Title of the invention: Method of attaching / detaching the catalyst unit and catalyst reactor
Technical field
[0001]
　The present disclosure relates to a method for attaching and detaching a catalyst unit and a catalyst reactor.
Background technology
[0002]
　For example, in a denitration device installed in a thermal power plant or the like, a catalyst is housed in a reactor of the denitration device (see Patent Document 1).
　Further, for example, in a plant for purifying the product gas obtained by the gasification of coal or heavy oil, of sulfur compounds contained in the product gas, COS and (carbonyl sulfide) H 2 is converted to S (hydrogen sulfide) The catalyst is housed in the reactor for coal (see Patent Document 2).
Prior art literature
Patent documents
[0003]
Patent Document 1: Japanese Patent No. 4435964
Patent Document 2: Japanese Patent No. 3764568
Outline of the invention
Problems to be solved by the invention
[0004]
　In the denitration device described in Patent Document 1 described above, a catalyst having a honeycomb structure having a structure in which a plurality of flow paths extending in the axial direction are formed is used.
　The denitration device described in Patent Document 1 described above includes a catalyst unit filled with a plurality of catalysts having a honeycomb structure, and the catalyst is replaced for each catalyst unit during maintenance of the denitration device. There is.
　By using a catalyst having a honeycomb structure, the contact efficiency between the exhaust gas and the catalyst is increased, and denitration can be performed efficiently.
[0005]
　Therefore, the plant for purification of, for example, described in Patent Document 2, the product gas, the COS H 2 the catalyst for converting the S, by using a catalyst having a honeycomb structure, the COS H 2 to S conversion It is possible to improve the efficiency of
　For example, in a plant that is described in Patent Document 2, the COS H 2 when using a catalyst having a catalyst on a honeycomb structure for converting the S,
[0006]
　Here, for example, in the plant described in Patent Document 2, the pressure of the produced gas introduced into the reactor for converting COS to H 2 S is, for example, about 2 to 4 MPa in gauge pressure. Therefore, in the reactor, from the viewpoint of ensuring strength, it is desirable that the opening area of ​​the openings provided in the reactor is as small as possible, and it is desirable that the number of openings installed is also small.
[0007]
　As described above, when the opening provided in the container is restricted, the problem is from what place the catalyst unit is taken in and out of the container.
[0008]
　In view of the above circumstances, at least one embodiment of the present invention aims to provide a method for moving the catalyst unit in and out of the container when the opening provided in the container is restricted.
Means to solve problems
[0009]
(1) The method of attaching / detaching the catalyst unit according to at least one embodiment of the present invention is a method of attaching / detaching the catalyst unit
　housed in the reactor housing of the catalyst reactor,
　and exhibits a cylindrical shape extending in the vertical direction. When the catalyst unit is attached to or detached from the reactor housing, which is configured so that a gas having a gauge pressure of 0.2 MPa or more is introduced into the reactor housing, the top of the reactor housing is used. A step
of passing the catalyst unit through the formed gas flow port is provided.
[0010]
　According to the method (1) above, since the catalyst unit is passed through the gas flow port formed at the top of the reactor housing, a new opening for passing the catalyst unit is provided in the reactor housing. The catalyst unit can be taken in and out of the reactor housing without it. Therefore, there are restrictions on the openings provided in the reactor housing from the viewpoint of ensuring strength, such as a reactor housing in which a gas having a gauge pressure of 0.2 MPa or more is introduced into the reactor housing. Even in some cases, the catalyst unit can be taken in and out of the reactor housing.
[0011]
(2) In some embodiments, in the method of (1) above, the
　distribution port has a circular shape, the
　catalyst unit has a quadrangular prism shape, and
　is orthogonal to the extending direction of the quadrangular prism shape. The diagonal dimension in the cross section is smaller than the inner diameter of the distribution port.
[0012]
　According to the method (2) above, the catalyst unit having a quadrangular prism shape can pass through the distribution port.
[0013]
(3) In some embodiments, in the method (1) or (2)
　above, when the catalyst unit is attached to or detached from the reactor housing , the reaction with the upper outer periphery of the casing of the catalyst unit. A step
of attaching / detaching a seal plate that closes the inner circumference of the vessel housing is further provided.
[0014]
　According to the method (3) above, when the catalyst unit is attached to and detached from the reactor housing, the seal plate is also attached and detached, so that the catalyst unit can be easily attached and detached.
[0015]
(4) In some embodiments, the method of (3) above further includes a step of passing each of the plurality of divided seal plates through the distribution port.
[0016]
　According to the method (4) above, by passing the seal plate through the distribution port in a divided state, even if the size of the seal plate before division is larger than the size of the distribution port, the reactor housing can be used. Can be taken in and out.
[0017]
(5) In some embodiments, in any of the methods (1) to (4) above, the catalyst unit is used by using a lifting device suspended from a hanging metal fitting provided inside the catalyst reactor. Is further provided with a step of moving the.
[0018]
　According to the method (5) above, the catalyst unit can be easily moved inside the catalyst reactor, and the work of attaching and detaching the catalyst unit can be made more efficient.
[0019]
(6) In some embodiments, in the method of (5) above, in the step of moving the catalyst unit using the lifting device, the catalyst unit is moved up and down from the outside of the reactor housing. The reactor housing is provided with the catalyst unit suspended by the lifting device using the lifting device suspended from the hanging metal fittings provided on the radial outside of the reactor housing from the flow port. Move in the radial direction.
[0020]
　When the catalyst unit is attached to or detached from the reactor housing by moving the catalyst unit in and out from the flow port formed at the top of the reactor housing, the catalyst unit is mounted by an elevating device provided outside the reactor such as a crane. In the suspended state, the catalyst unit is moved between the flow port and the arrangement position of the catalyst unit. In this case, if the position of the flow port formed on the top of the reactor housing and the position of the catalyst unit to be attached / detached are deviated in the radial direction of the flow port (diameter direction of the reactor housing). , It is necessary to move the catalyst unit in the reactor housing in the radial direction of the reactor housing.
　In that respect, according to the method (6) above, the position of the flow port formed at the top of the reactor housing and the arrangement position of the catalyst unit to be attached / detached are displaced in the radial direction of the reactor housing. However, by using a lifting device suspended from a hanging bracket provided on the radial side of the reactor housing with respect to the flow port, it becomes easy to move the catalyst unit in the radial direction of the reactor housing. As a result, the work of attaching and detaching the catalyst unit can be made more efficient.
[0021]
(7) In some embodiments, in the method of (6) above, when the catalyst unit is installed in the reactor housing, in the step of moving the catalyst unit using the lifting device, the external By operating the lifting device and the lifting device in cooperation with each other, the catalyst unit is moved outward in the radial direction from the position below the vertical direction of the distribution port.
[0022]
　According to the method (7) above, the catalyst unit is operated in cooperation with an external lifting device such as a crane and a lifting device suspended from a hanging metal fitting in the reactor housing to operate the catalyst unit in the reactor housing. It becomes easy to move in the radial direction of. As a result, the work of attaching and detaching the catalyst unit can be made more efficient.
[0023]
(8) The catalyst reactor according to at least one embodiment of the present invention has a
　catalyst unit and
　a cylindrical shape extending in the vertical direction, so that a gas having a gauge pressure of 0.2 MPa or more is introduced therein. The gas flow port is formed at the top of the reactor housing, and the reactor housing for accommodating the catalyst unit and the reactor housing
　above the catalyst unit and above the flow port. A hanging metal fitting provided on the outer side in the radial direction of the reactor housing is
provided.
[0024]
　According to the configuration of (8) above, a lifting device such as a chain block is suspended from the hanging metal fitting, and by using this lifting device, the catalyst unit can be easily moved in the radial direction of the reactor housing. .. As a result, when attaching / detaching the catalyst unit, the attachment / detachment work can be made more efficient.
[0025]
(9) In some embodiments, in the configuration of (8) above, the hanging metal fittings are provided on the top of the reactor housing and the peripheral wall of the reactor housing.
[0026]
　According to the configuration of (9) above, the installation position of the hanging bracket provided on the top of the reactor housing and the installation position of the hanging bracket provided on the peripheral wall of the reactor housing are the positions of the reactor housing. The radial position is different. As described above, by appropriately using the hanging metal fittings having different installation positions in the radial direction of the reactor housing, the catalyst unit can be easily moved in the radial direction of the reactor housing. As a result, when the catalyst unit is attached / detached, the attachment / detachment work can be made more efficient.
The invention's effect
[0027]
　According to at least one embodiment of the present invention, the catalyst unit can be easily taken in and out of the container even when the opening provided in the container is restricted.
A brief description of the drawing
[0028]
FIG. 1 is a diagram showing an example of a plant including a catalyst reactor to which the method of attaching and detaching a catalyst unit according to some embodiments is applied.
FIG. 2 is a diagram showing a schematic structure of a catalytic reactor according to some embodiments.
FIG. 3 is a schematic perspective view of a catalyst unit.
FIG. 4 is a schematic perspective view of a connected body in which catalyst units are connected.
FIG. 5 is a perspective view of a conversion unit in which connections are arranged in a grid pattern.
6 is a cross-sectional view taken along the line BB of FIG. 2. FIG.
7 is a cross-sectional view taken along the line AA of FIG. 2. FIG.
FIG. 8 is a flowchart showing a processing procedure in a method of attaching / detaching a catalyst unit according to some embodiments.
FIG. 9 is a diagram for explaining a moving process and an elevating process.
FIG. 10 is a diagram for explaining a moving process and an elevating process.
FIG. 11 is a diagram for explaining a moving process and an elevating process.
Mode for carrying out the invention
[0029]
　Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention to this, but are merely explanatory examples. Absent.
　For example, expressions that represent relative or absolute arrangements such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric" or "coaxial" are exact. Not only does it represent such an arrangement, but it also represents a state of relative displacement with tolerances or angles and distances to the extent that the same function can be obtained.
　For example, expressions such as "same", "equal", and "homogeneous" that indicate that things are in the same state not only represent exactly the same state, but also have tolerances or differences to the extent that the same function can be obtained. It shall also represent the state of existence.
　For example, the expression representing a shape such as a quadrangular shape or a cylindrical shape not only represents a shape such as a quadrangular shape or a cylindrical shape in a geometrically strict sense, but also an uneven portion or chamfering within a range where the same effect can be obtained. The shape including the part and the like shall also be represented.
　On the other hand, the expressions "equipped", "equipped", "equipped", "included", or "have" one component are not exclusive expressions that exclude the existence of other components.
[0030]
　FIG. 1 is a diagram showing an example of a plant including a catalyst reactor to which the method of attaching and detaching the catalyst unit according to some embodiments is applied, and is a diagram showing a configuration of a pretreatment unit which is a part of a gas purification plant. Is.
　The gas refining plant according to FIG. 1 is a plant that refines the produced gas obtained by gasifying coal as a raw material.
[0031]
　In the gasification furnace (not shown), for example, coal is gasified using air or oxygen as a gasifying agent, and a produced gas A containing carbon monoxide and hydrogen as main components is generated.
　As described above, the generated gas A using coal as a raw material and air or oxygen as a gasifying agent usually contains H 2 S (sulfur compound) of about 1000 to 1500 ppm and COS (sulfur compound) of about 100 to 1000 ppm. It is contained.
　As shown in FIG. 1, the generated gas A is first introduced into the cyclone 1 and the porous filter 2 in sequence, and has a configuration in which relatively large-diameter dust and fine dust are separated and removed.
[0032]
　A heat exchanger 3 (heat exchanger for reheating) is provided in the wake of the porous filter 2, and the gas A4 after being purified by the heat of the gas A1 derived from the porous filter 2 is heated to heat the gas A5. It is configured to be discharged as. The gas A1 is configured to be cooled by being deprived of heat by the heat exchanger 3.
[0033]
　On the downstream of the heat exchanger 3, COS and H 2 S is a catalytic reactor 10 in which the catalyst is loaded to convert provided, most COS in product gas A2 after being cooled by the heat exchanger 3 It is converted to H 2 S by the catalyst reactor 10 and discharged as gas A 3 containing almost no COS.
[0034]
　A heat exchanger 11 (heat exchanger for preheating) is provided in the wake of the catalyst reactor 10, and the gas A4 after being purified by the heat of the gas A3 derived from the catalyst reactor 10 is heated. It has a structure of On the contrary, the gas A3 is cooled by being deprived of heat by the heat exchanger 11.
[0035]
　A cooling tower 12 is installed in the wake of the heat exchanger 11 to bring the gas A3 into gas-liquid contact with the coolant B1 before introducing the gas A3 into a desulfurization portion (not shown) described later.
　In this case, the cooling tower 12 is a so-called filling type gas-liquid contact tower, and the cooling liquid B1 containing water stored in the bottom of the tower as a main component is sucked up by the circulation pump 13 and is sucked up from the spray pipe 14 at the top of the tower. It is injected, flows down through the filler 15 while in gas-liquid contact with the gas A3, returns to the bottom of the tower again, and circulates.
[0036]
　The circulation line of the circulation pump 13 is provided with a cooler 16 that cools the coolant B1 using industrial water or the like as a refrigerant, and the heat of the gas A3 is indirectly recovered here. Further, in the cooling tower 12, the gas A3 is cooled by contact with the coolant B.
[0037]
　Further, in the pretreatment section of this example shown in FIG. 1, a heater 17 is provided in addition to the heat exchanger 11 described above as the preheating means of the present invention. The heater 17 is arranged on the wake side of the heat exchanger 11 in the discharge line of the gas A4 after the purification treatment, and the gas A4 is generated by heat energy such as high-temperature steam supplied from outside the system of the apparatus configuration shown in FIG. Is to heat further.
[0038]
　In the desulfurization section (not shown), H 2 S is removed from the gas A3 by bringing the gas A3 cooled in the cooling tower 12 into gas-liquid contact with the absorbing liquid . The gas A4 after the H 2 S is removed is heated by the above-mentioned heat exchanger 11, the heater 17, and the heat exchanger 3 to become the treated gas A5. The treated gas A5 is supplied to, for example, a gas turbine of a combined cycle system.
[0039]
　In the gas refining plant described above, the pressure of the produced gas A2 introduced into the catalyst reactor 10 is, for example, about 2 to 4 MPa in gauge pressure. Therefore, a pressure of about 2 to 4 MPa acts as an internal pressure on the catalyst reactor 10 according to some embodiments. Therefore, in the catalyst reactor 10, from the viewpoint of ensuring the strength of the catalyst reactor 10, it is desirable that the opening area of ​​the opening is as small as possible, and it is desirable that the number of openings installed is also small. Hereinafter, the structure of the catalyst reactor 10 according to some embodiments will be described.
[0040]
　FIG. 2 is a diagram showing a schematic structure of the catalyst reactor 10 according to some embodiments. FIG. 3 is a schematic perspective view of the catalyst unit 104. FIG. 4 is a schematic perspective view of a connecting body 105 to which the catalyst unit 104 is connected. FIG. 5 is a perspective view of the conversion unit 106 in which the connecting bodies 105 are arranged in a grid pattern.
[0041]
　The catalytic reactor 10 according to some embodiments has a reactor housing 101 having a cylindrical shape extending in the vertical direction and a honeycomb structure having a structure in which a plurality of flow paths extending in the axial direction are formed. It includes a catalyst unit 104 (see FIG. 3) including a catalyst 102.
　Here, the axial direction refers to the extending direction of the flow path (cell) 102a (see FIG. 3) in the catalyst 102 having a honeycomb structure. In some embodiments, the catalyst 102 is arranged in the reactor housing 101 such that the extending direction of the flow path 102a coincides with the direction of the main flow of gas in the reactor housing 101, as described below. Will be done. Therefore, in some embodiments, when the catalyst 102 is arranged in the catalyst reactor 10, the axial direction is the same as the extending direction of the reactor housing 101 having a cylindrical shape, that is, the vertical direction. Further, for convenience of explanation, the vertical direction is defined as shown in each figure. When the constituent members of the catalyst reactor 10 shown in each figure are arranged in the catalyst reactor 10, the vertical direction defined in each figure is the same as the vertical direction.
[0042]
　As shown in FIG. 2, in the catalytic reactor 10 according to some embodiments, a gas flow port (inlet opening) 151 is provided in the end plate portion 101b at the top of the reactor housing 101. In the catalytic reactor 10 according to some embodiments, the inlet opening 151 is a circular opening coaxial with the central axis CL of the reactor housing 101 having a cylindrical shape.
[0043]
　In the catalytic reactor 10 according to some embodiments, the introduction pipe 191 of the generated gas A2 is connected to the inlet opening 151 at the top of the reactor housing 101. The generated gas A2 containing COS is introduced into the reactor housing 101 from the inlet opening 151.
　A rectifier 152 for suppressing the flow of the generated gas A2 into the conversion unit 106 while being biased is connected to the tip portion on the downstream side of the introduction pipe 191. The rectifier 152 has, for example, a bottomed cylindrical shape, and a plurality of openings for blowing out the generated gas A2 supplied to the inner circumference are formed in the cylindrical portion.
　The generated gas A2 introduced into the reactor housing 101 via the rectifier 152 passes through the conversion unit 106, which will be described later, arranged in a plurality of stages from above to below, and is generated by the catalyst 102. COS contained in A2 is H 2 is converted into S.
[0044]
　In the catalytic reactor 10 according to some embodiments, the discharge pipe 192 of the generated gas A2 is connected to the gas flow port (outlet opening) 153 at the bottom of the reactor housing 101.
　The gas A3 containing H 2 S converted from COS by the conversion unit 106 is discharged from the outlet opening 153 to the discharge pipe 192.
[0045]
　In the catalytic reactor 10 according to some embodiments, a manhole 154 is provided in the cylinder portion of the reactor housing 101.
[0046]
　In the catalyst reactor 10 according to some embodiments, the catalyst reactor 10 is suspended above the catalyst unit 104 arranged in the reactor housing 101 and radially outside the reactor housing 101 from the inlet opening 151. The metal fitting 200 is attached. Specifically, the hanging metal fittings 200 include a first hanging metal fitting 201 attached to the top of the reactor housing 101 and a second hanging metal fitting 202 attached to the peripheral wall (inner peripheral surface 101a) of the reactor housing 101. And include.
[0047]
　A plurality of the first hanging metal fittings 201 are attached to a region of the end plate portion 101b at the top of the reactor housing 101 on the radial side of the reactor housing 101 with an interval in the circumferential direction from the inlet opening 151. There is.
　A plurality of the second hanging metal fittings 202 are attached in the vicinity of the upper end of the inner peripheral surface 101a of the cylindrical portion of the reactor housing 101 at intervals in the circumferential direction.
　If the circumferential position of the reactor housing 101 to which the first hanging bracket 201 is attached and the circumferential position of the reactor housing 101 to which the second hanging bracket 202 is attached are different, as will be described later. When the catalyst unit 104 (connecting body 105) is moved to an arbitrary position in the horizontal direction in the reactor housing 101, the catalyst unit 104 (connecting body 105) can be easily moved.
[0048]
　For example, as shown in FIG. 11 described later, the first hanging metal fitting 201 may be further provided at different positions in the radial direction. That is, the first hanging metal fittings 201 are a plurality of first hanging metal fittings 201a provided along a virtual first circumference (not shown) centered on the central axis CL of the reactor housing 101, and the reactor housing. It may include a plurality of first hanging metal fittings 201b provided along a virtual second circumference (not shown) having a diameter different from that of the first circumference, centered on the central axis CL of 101. In this case, if the first hanging metal fittings 201a provided along the first circumference and the first hanging metal fittings 201b provided along the second circumference are different in the circumferential direction, the catalyst unit 104 (Connector 105) can be easily moved to an arbitrary position in the horizontal direction in the reactor housing 101.
　The second hanging metal fitting 202 does not necessarily have to be provided.
[0049]
　As shown in FIG. 3, the catalyst unit 104 according to some embodiments has a quadrangular prism shape extending in the axial direction. In the catalyst unit 104 according to some embodiments, the diagonal dimension (diagonal dimension) D3 in the cross section orthogonal to the extending direction of the square pillar shape is smaller than the inner diameter D2 of the inlet opening 151. Therefore, as will be described later, the catalyst unit 104 can pass through the inlet opening 151.
　The catalyst unit 104 according to some embodiments comprises at least one catalyst 102. In the example shown in FIG. 3, the catalyst 102 has a quadrangular prism shape extending in the axial direction, that is, in the same direction as the extending direction of the flow path 102a of the catalyst 102. In the example shown in FIG. 3, the catalyst 102 has a regular tetrahedron shape whose both end faces are square, but the catalyst 102 does not necessarily have to have a regular tetrahedron shape.
[0050]
　In the example shown in FIG. 3, the catalyst unit 104 includes, for example, nine catalysts 102. In the catalyst unit 104 according to some embodiments, nine catalysts 102 are integrally held by the casing 107. In the catalyst unit 104 according to some embodiments, the catalyst 102 is housed in the catalyst unit 104 so that its axial direction coincides with the extending direction (vertical direction) of the square cylinder of the casing 107.
[0051]
　As shown in FIG. 4, in the catalyst reactor 10 according to some embodiments, a connecting body 105 in which a plurality of catalyst units 104 are connected in the vertical direction is formed. Then, as shown in FIG. 5, in the catalytic reactor 10 according to some embodiments, a plurality of the coupling bodies 105 shown in FIG. 4 are arranged in a grid pattern in a direction orthogonal to the vertical direction (axial direction) and converted. Part 106 is formed.
　FIG. 6 is a cross-sectional view taken along the line BB in FIG. 2, which schematically shows the arrangement of the catalyst unit 104 (connecting body 105) in the reactor housing 101.
[0052]
　As shown in FIG. 2, in the catalytic reactor 10 according to some embodiments, the conversion unit 106 is arranged in the reactor housing 101 so that the vertical direction of the connecting body 105 coincides with the vertical direction. In the catalytic reactor 10 according to some embodiments, a plurality of conversion units 106 are arranged vertically spaced apart in the reactor housing 101.
[0053]
　As described above, the catalyst 102 is housed in the catalyst unit 104 so that its axial direction coincides with the vertical direction of the catalyst unit 104. Then, in the connecting body 105 in which a plurality of catalyst units 104 are connected in the vertical direction, the conversion unit 106 is arranged in the reactor housing 101 so that the vertical direction coincides with the vertical direction. Therefore, the catalyst unit 104 is housed in the reactor housing 101 so that the axial direction, which is the extending direction of the flow path 102a of the catalyst 102, is aligned with the vertical direction.
[0054]
　In the catalyst reactor 10 according to some embodiments configured in this way, for example, when there is a gap between the outer circumference of the catalyst unit 104 and the inner circumference (inner peripheral surface 101a) of the reactor housing 101, it is generated. The gas A2 flows by bypassing the catalyst 102 through the gap, and the generated gas A2 cannot be efficiently brought into contact with the catalyst 102.
　Therefore, the catalyst reactor 10 according to some embodiments is provided with a seal plate 130 that closes between the upper outer circumference of the casing 107 of the catalyst unit 104 and the inner circumference of the reactor housing 101. In the catalyst reactor 10 according to some embodiments, the seal plate 130 is the outer periphery of the catalyst unit 104 at the upstream end of the flow of the fluid (generated gas A2) flowing in the reactor housing 101 of the catalyst unit 104. And the inner circumference of the reactor housing 101 are closed.
[0055]
　As a result, the seal plate 130 suppresses the flow of the generated gas A2 that tries to bypass between the outer circumference of the catalyst unit 104 and the inner circumference of the reactor housing 101, so that the fluid is efficiently brought into contact with the catalyst 102. Can be done.
[0056]
(Regarding the Seal Plate 130) The
　seal plate 130 will be described below.
　FIG. 7 is a cross-sectional view taken along the line AA of FIG. In some embodiments, as shown in FIG. 7, among the seal plates 130, the first seal plate 131 and the second seal plate 132, which will be described later, are located at the outermost peripheral positions of the plurality of arranged catalyst units 104. It is fixed to the casing 107 of the catalyst unit 104 and the reactor housing 101.
[0057]
　Specifically, for example, a support ring 161 (see FIG. 2) for fixing the seal plate 130 is attached to the inner peripheral surface 101a of the reactor housing 101. The support ring 161 is a plate-shaped member having an annular shape, and a nut (not shown) is fixed to the lower surface by welding, for example.
[0058]
　The seal plate 130 is arranged on the upper surface of the support ring 161 and the upper surface of the upper flange portion 116 of the casing 107 of the catalyst unit 104. The seal plate 130 is fixed to the upper surface of the support ring 161 by, for example, by connecting a bolt (not shown) to a nut (not shown) on the lower surface of the support ring 161. Further, the seal plate 130 is fixed to the upper surface of the upper flange portion 116 by the bolt, for example, by connecting a bolt to a nut (not shown) fixed to the lower surface of the upper flange portion 116 of the casing 107 of the catalyst unit 104. Ru.
[0059]
　In some embodiments, the seal plate 130 is divided into a plurality. For example, the seal plate 130 includes a first seal plate 131 having a substantially bow shape, a second seal plate 132 having a substantially triangular shape in which one of the three sides has an arc shape, a rectangular third seal plate 133, and the like. Includes a fourth seal plate 134.
　In some embodiments, the conversion unit 106 excludes, for example, the four corners in the arrangement of 5 rows and 5 columns, that is, the 1st row 1st column, the 1st row 5th column, the 5th row 1st column, and the 5th row 5th column. The catalyst units 104 are arranged in a grid pattern at 21 locations. For example, the first seal plate 131 is linearly arranged at the outermost peripheral position of the catalyst units 104 arranged in a grid pattern at 21 places excluding one place at each of the four corners in the arrangement of 5 rows and 5 columns. It is configured to seal the gap 108 between the three catalyst units 104 and the reactor housing 101.
　The second seal plate 132 is configured to seal the gap 108 between the catalyst unit 104 and the reactor housing 101, for example, at positions corresponding to the four corners in the above-mentioned 5 rows and 5 columns arrangement.
　For example, the third seal plate 133 and the fourth seal plate 134 are configured to seal the gap between two adjacent catalyst units 104. For example, the third seal plate 133 provides a gap between the three catalyst units 104 arranged linearly and the three catalyst units 104 arranged linearly adjacent to the three catalyst units 104. It is configured to be sealed by one third seal plate 133. For example, the fourth seal plate 134 is configured to seal the gap between two adjacent catalyst units 104 except in the region where the first seal plate 131 to the third seal plate 133 seal. The third seal plate 133 and the fourth seal plate 134 also play a role of connecting adjacent catalyst units 104 (connecting bodies 105) at the upper ends. The third seal plate 133 and the fourth seal plate 134 are fixed to each of the adjacent catalyst units 104 with bolts (not shown) on the upper surface of the upper flange portion 116 of the casing 107.
[0060]
　As described above, in some embodiments, the seal plate 130 is fixed to the casing 107 of the catalyst unit 104 at the outermost peripheral position of the plurality of arranged catalyst units 104 and the reactor housing 101 to seal the seal. The sealing effect of the generated gas A2 by the plate 130 can be enhanced.
[0061]
　In some embodiments, as described above, at least two of the casings 107 arranged in the vertical direction are connected to form the connecting body 105 of the catalyst unit 104. In some embodiments, the connecting body 105 has a seal plate 130 on the upper end of the connecting body 105, that is, the upper surface of the upper flange portion 116 of the casing 107 in the catalyst unit 104 located on the uppermost side of the connecting body 105. It is fixed to the reactor casing 101 via (first seal plate 131 and second seal plate 132).
　Further, as shown in FIG. 2, in some embodiments, the lower end of the connecting body 105 (converting unit 106) is supported from below by the support member 171 fixed to the reactor housing 101.
　As a result, for example, without forming the connecting body 105, each of the plurality of catalyst units 104 arranged in the vertical direction is fixed to the reactor housing 101 via the seal plate 130 and supported by the support member 171 from below. Compared with the case, the fixed portion above the catalyst unit 104 and the supporting portion from below can be reduced.
[0062]
　In some embodiments, as shown in FIG. 2, a plurality of connectors 105 are arranged vertically spaced apart from each other. The upper end of each of the plurality of connecting bodies 105 is fixed to the reactor housing 101 via the seal plate 130, and the lower end is lowered by the support member 171 fixed to the reactor housing 101. Is supported by.
　As a result, the upper end of each of the connecting bodies 105 arranged apart from each other in the vertical direction is fixed to the reactor housing 101, so that the posture of the connecting body 105 can be stabilized. Further, since each of the connecting bodies 105 arranged apart from each other in the vertical direction is supported from below by the support member 171, the plurality of connecting bodies 105 are further connected in the vertical direction, and the lowermost connecting body 105 is supported by the supporting member 171. As compared with the case of supporting by, the load acting on each connecting body 105 can be reduced, and the load acting on the reactor housing 101 can be dispersed.
[0063]
　In some embodiments, the seal plate 130 is fixed on top of the connector 105 to restrict the horizontal movement of the connector 105 through the seal plate 130. Further, in some embodiments, the lower end of the connecting body 105 is supported by the supporting member 171 to support the load of the connecting body 105 and the downward force received by the connecting body 105 from the generated gas A2 during plant operation. I am paying at 171. As described above, in some embodiments, the seal plate 130 has a function of restricting the horizontal movement of the connecting body 105 and a function of sealing the gap 108 to support a load function such as a load acting on the connecting body 105. It is provided on the member 171. That is, the structure of the seal plate 130 can be simplified by causing the support member 171 to bear a force acting on the connecting body 105 in the vertical direction.
[0064]
　The support member 171 is a beam-shaped member, and is detachably fixed to, for example, a support lug 176 fixed to the inner peripheral surface 101a of the reactor housing 101. Each connecting body 105, that is, the conversion unit 106 is placed on the upper surface of the support member 171 and its lower end is supported by the support member 171.
[0065]
(Regarding the number of catalyst units 104 connected in the connector 105) As
　shown in FIG. 2, in the catalyst reactor 10 according to some embodiments, except for the conversion unit 106 at the uppermost stage, the catalyst 105 has three catalysts. The units 104 are connected in the vertical direction. However, the number of connected catalyst units 104 in the connecting body 105 is not limited to 3, and may be 2 or 4 or more. Hereinafter, the number of connected catalyst units 104 in the connected body 105 is also simply referred to as the number of connected members.
[0066]
　In the catalyst reactor 10 according to some embodiments, in the conversion unit 106 at the uppermost stage, the connector 105 has two catalyst units 104 connected in the vertical direction. However, in the conversion unit 106 at the uppermost stage, the number of connections is not limited to 2, that is, the catalyst unit 104 may not be connected in the vertical direction. Further, in the conversion unit 106 at the uppermost stage, the number of connections may match the number of connections in the conversion unit 106 other than the uppermost stage. For example, as shown by the alternate long and short dash line in FIG. 2, the number of connections in the conversion unit 106 in the uppermost stage may be set to 3 and match the number of connections in the conversion unit 106 other than the uppermost stage.
　Thus, with the configuration capable of changing the connection number of the catalyst unit 104 in the uppermost converter unit 106, H of COS in the catalytic reactor 10 2 can change the conversion capability of the S.
　The support rings 161 are positioned at a plurality of positions in the height direction so that the seal plate 130 can be fixed to the support ring 161 (see FIG. 2) even if the number of connected catalyst units 104 in the uppermost conversion unit 106 is changed. May be provided respectively.
[0067]
　In the catalytic reactor 10 according to some of the above-described embodiments, the opening having the largest opening diameter is the inlet opening 151. The entrance opening 151 is provided above the conversion unit 106 at the uppermost stage. Further, as described above, the diagonal dimension D3 of the catalyst unit 104 according to some embodiments is smaller than the inner diameter D2 of the inlet opening 151.
　Therefore, in the catalyst reactor 10 according to some embodiments, when the catalyst reactor 10 is installed or when the catalyst 102 is replaced, the catalyst unit is passed through the inlet opening 151 at the top of the reactor housing 101. The 104 is to be taken in and out of the reactor housing 101.
　As described above, in the catalyst reactor 10 according to some embodiments, a connecting body 105 in which a plurality of catalyst units 104 are connected in the vertical direction is formed, and the diagonal dimension thereof is a pair of the catalyst unit 104. Equal to square dimension D3.
　Therefore, in the catalyst reactor 10 according to some embodiments, the catalyst unit is installed through the inlet opening 151 at the top of the reactor housing 101 when the catalyst reactor 10 is installed or when the catalyst 102 is replaced. The 104 is to be taken in and out of the reactor housing 101 as the connector 105.
[0068]
(Method of attaching / detaching the catalyst unit)
　Hereinafter, the method of attaching / detaching the catalyst unit according to some embodiments will be described.
　The method of attaching / detaching the catalyst unit according to some embodiments includes an introduction pipe attachment / detachment step S1, a support member passing step S2, a support member attaching / detaching step S3, a connecting body passing step S4, a connecting body attaching / detaching step S5, and a seal plate. The passage step S6 and the seal plate attachment / detachment step S7 are included.
　Note that FIG. 8 is a flowchart in which the processing procedures in the method of attaching / detaching the catalyst unit according to some embodiments are arranged in the order of being carried out when the catalyst unit 104 is carried into the reactor housing 101 and attached. Although not shown, when the catalyst unit 104 is removed from the reactor housing 101 and carried out of the reactor housing 101, each step is performed in the reverse order of the order shown in FIG.
[0069]
　The introduction tube attachment / detachment step S1 is a step of attaching / detaching the introduction tube 191 and the rectifier 152 to / from the inlet opening 151 at the top of the reactor housing 101. In the introduction pipe attachment / detachment step S1, the worker attaches / detaches the introduction pipe 191 and the rectifier 152 to / from the inlet opening 151 at the top of the reactor housing 101. The introduction pipe 191 and the rectifier 152 are suspended by an elevating device provided outside the reactor housing 101, such as a crane, and move between the top of the reactor housing 101 and the ground.
　In the work of carrying the catalyst unit 104 into the reactor housing 101 and attaching it, the introduction pipe attachment / detachment step S1 is a step of connecting the rectifier 152 and the introduction pipe 191 to the inlet opening 151 at the top of the reactor housing 101. ..
　In the work of removing the catalyst unit 104 from the reactor housing 101 and carrying it out of the reactor housing 101, the introduction pipe attachment / detachment step S1 involves the rectifier 152 and the introduction pipe 191 from the inlet opening 151 at the top of the reactor housing 101. This is the process of removing and.
　Hereinafter, a series of operations for carrying the catalyst unit 104 into the reactor housing 101 and mounting the catalyst unit 104 is simply referred to as a carry-in work, and the catalyst unit 104 is removed from the reactor housing 101 and carried out to the outside of the reactor housing 101. The series of work for doing this is simply called the carry-out work.
[0070]
　The support member passing step S2 is a step of passing each support member 171 through the inlet opening 151. In the support member passing step S2, the operator who operates the elevating device provided outside the reactor housing 101 and the worker who entered the reactor housing 101 from the manhole 154 cooperate with each other to reach the inlet opening 151. Each support member 171 is passed through.
　In the case of the carry-in operation, the support member passing step S2 is a step of carrying the support member 171 into the reactor housing 101 from the inlet opening 151. In the case of the carry-in operation, in the support member passing step S2, the support member 171 is carried into the reactor housing 101 from the inlet opening 151 by using an elevating device provided outside the reactor housing 101.
　In the case of the carry-out operation, the support member passing step S2 is a step of carrying out the support member 171 from the inlet opening 151 to the outside of the reactor housing 101. In the case of carrying-out work, in the support member passing step S2, the support member 171 is carried out of the reactor housing 101 from the inlet opening 151 by using an elevating device provided outside the reactor housing 101.
[0071]
　The support member attachment / detachment step S3 is a step of attaching / detaching the support member 171 to / from the support lug 176 fixed to the inner peripheral surface 101a of the reactor housing 101. In the support member attachment / detachment step S3, a worker in the reactor housing 101 attaches / detaches the support member 171 to / from the support lug 176.
　In the case of the carry-in work, the support member attachment / detachment step S3 is a step of attaching the support member 171 to the support lug 176.
　In the case of carrying-out work, the support member attachment / detachment step S3 is a step of removing the support member 171 from the support lug 176.
[0072]
　The connecting body passing step S4 is a step of passing the connecting body 105, that is, a plurality of catalyst units 104 connected in the vertical direction through the inlet opening 151. In the connecting body passing step S4, the operator who operates the elevating device provided outside the reactor housing 101 and the worker in the reactor housing 101 cooperate to pass the connecting body 105 through the inlet opening 151. Let me.
　In the case of the carry-in operation, the connecting body passing step S4 is a step of carrying the connecting body 105 into the reactor housing 101 from the inlet opening 151. In the case of the carry-in operation, in the connecting body passing step S4, the connecting body 105 is carried into the reactor housing 101 from the inlet opening 151 by using an elevating device provided outside the reactor housing 101.
　In the case of the unloading operation, the connecting body passing step S4 is a step of carrying out the connecting body 105 from the inlet opening 151 to the outside of the reactor housing 101. In the case of the carry-out operation, in the connecting body passing step S4, the connecting body 105 is carried out from the inlet opening 151 to the outside of the reactor housing 101 by using an elevating device provided outside the reactor housing 101.
[0073]
　As described above, the method of attaching / detaching the catalyst unit according to some embodiments is a method of attaching / detaching the catalyst unit 104 housed in the reactor housing 101 of the catalyst reactor 10 with respect to the reactor housing 101. When the catalyst unit 104 is attached or detached, a step of passing the catalyst unit 104 through the inlet opening 151, which is a gas flow port formed at the top of the reactor housing 101 (connector passing step S4), is provided.
　According to this method of attaching / detaching the catalyst unit, the catalyst unit 104 is passed through the inlet opening 151 formed at the top of the reactor housing 101, so that a new opening for passing the catalyst unit 104 is provided in the reactor housing. The catalyst unit 104 can be taken in and out of the reactor housing 101 without being provided in 101. Therefore, even when there are restrictions on the opening provided in the reactor housing 101 from the viewpoint of ensuring strength, as in the reactor housing 101 according to some embodiments, the catalyst unit 104 can be mounted on the reactor housing 101. It can be taken in and out of the body 101.
[0074]
　The connecting body attachment / detachment step S5 is a step of attaching / detaching the connecting body 105 to / from the reactor housing 101. In the connecting body attachment / detachment step S5, the worker in the reactor housing 101 mainly performs the work of attaching / detaching the connecting body 105 to / from the reactor housing 101.
　In the case of the carry-in operation, in the connecting body attachment / detachment step S5, the connecting body 105 suspended by an elevating device provided outside the reactor housing 101 and located below the inlet opening 151 is brought into the connecting body 105. The moving step S51 moved above the arrangement position 209 (see FIG. 9) in the reactor housing 101 and the connecting body 105 moved above the arrangement position 209 are lowered and arranged at the arrangement position 209. The elevating step S52 is included.
　In the case of the carrying-out work, in the connecting body attachment / detachment step S5, the connecting body 105 arranged at the arrangement position 209 is lifted upward in the elevating step S52, and the connection is lifted above the arrangement position 209 in the moving step S51. The body 105 is moved to a position below the entrance opening 151.
　Details of the moving step S51 and the elevating step S52 will be described later.
[0075]
　The seal plate passing step S6 is a step of passing the divided seal plate 130 through the inlet opening 151, that is, a step of passing each of the seal plates 131 to 134 in a separated state. In the seal plate passing step S6, the operator who operates the elevating device provided outside the reactor housing 101 and the worker in the reactor housing 101 cooperate to open the divided seal plate 130 at the entrance. Pass through 151.
　In the case of the carry-in operation, the seal plate passing step S6 is a step of carrying the divided seal plate 130 into the reactor housing 101 from the inlet opening 151. In the case of the carry-in operation, in the seal plate passing step S6, the seal plate 130 divided by using the elevating device provided outside the reactor housing 101 is carried into the reactor housing 101 from the inlet opening 151.
　In the case of the carry-out operation, the seal plate passing step S6 is a step of carrying out the divided seal plate 130 from the inlet opening 151 to the outside of the reactor housing 101. In the case of the carry-out operation, in the seal plate passing step S6, the seal plate 130 divided by using the elevating device provided outside the reactor housing 101 is carried out from the inlet opening 151 to the outside of the reactor housing 101.
　In the seal plate passing step S6, a plurality of seal plates 130 may be collectively passed through the inlet opening 151 in a size that allows them to pass through the inlet opening 151.
[0076]
　As described above, the method of attaching and detaching the catalyst unit according to some embodiments includes a step of passing each of the seal plates 130 divided into a plurality of portions through the inlet opening 151 (seal plate passing step S6).
　As a result, the seal plate 130 whose size before division is larger than the size of the inlet opening 151 can be taken in and out of the reactor housing 101.
[0077]
　The seal plate attachment / detachment step S7 is a step of attaching / detaching the seal plate 130 to / from the support ring 161 and the upper flange portion 116 of the casing 107 of the catalyst unit 104, or to the upper flange portion 116 of the catalyst unit 104. In the seal plate attachment / detachment step S7, a worker in the reactor housing 101 attaches / detaches each of the seal plates 131 to 134, respectively.
　In the case of carrying-in work, the seal plate attachment / detachment step S7 is a step of attaching the seal plate 130.
　In the case of carrying-out work, the seal plate attachment / detachment step S7 is a step of removing the seal plate 130.
[0078]
　As described above, the method of attaching / detaching the catalyst unit according to some embodiments is a step of attaching / detaching the seal plate 130 that closes between the upper outer circumference of the casing 107 of the catalyst unit 104 and the inner circumference of the reactor housing 101 (seal). The plate attachment / detachment step S7) is provided.
　As a result, when the catalyst unit 104 (connecting body 105) is attached to and detached from the reactor housing 101, the seal plate 130 is also attached and detached, so that the catalyst unit 104 (connecting body 105) can be easily attached and detached.
[0079]
　The steps from the support member passing step S2 to the seal plate attachment / detachment step S7 are carried out for each of the conversion units 106 provided in a plurality of stages. In the case of the carry-in work, the carry-in work is performed in order from the lowermost conversion unit 106, and in the case of the carry-out work, the carry-out work is performed in order from the uppermost conversion unit 106.
[0080]
(Movement Step S51) The
　movement step S51 will be described. In the following description, the moving step S51 in the carrying-in work will be mainly described. The work content carried out in the moving step S51 in the carry-out work is the same as the work content carried out in the moving step S51 in the carry-in work.
　9, 10, and 11 are diagrams for explaining the moving step S51 and the elevating step S52.
　As shown by the broken lines in FIGS. 9 and 10, the connecting body 105 is suspended by, for example, a sling wire 206 or a hanging jig 205 suspended by an elevating device (not shown) provided outside the reactor housing 101. In this state, it is carried into the reactor housing 101.
　Although not shown, the hanging jig 205 is attached to the catalyst unit 104 (connecting body 105) by connecting a bolt to a nut (not shown) fixed to the lower surface of the upper flange portion 116 of the casing 107 of the catalyst unit 104. Can be fixed.
[0081]
　When the connecting body 105 is attached to and detached from the reactor housing 101 by moving the connecting body 105 in and out from the inlet opening 151 of the reactor housing 101, the connecting body 105 is moved by an elevating device provided outside the reactor housing 101. In the suspended state, the connecting body 105 is moved between the inlet opening 151 and the arrangement position 209 of the connecting body 105. In this case, if the position of the inlet opening 151 and the arrangement position 209 of the connecting body 105 to be attached / detached are displaced in the radial direction of the reactor housing 101, the connecting body 105 is reacted in the reactor housing 101. It is necessary to move the reactor housing 101 in the radial direction, that is, in the horizontal direction.
[0082]
　In the carry-in operation, if the arrangement position 209 of the connecting body 105 in the reactor housing 101 is a position vertically below the inlet opening 151 or a position in the vicinity thereof, the worker 220 in the reactor housing 101 is the reactor. By appropriately adjusting the horizontal position of the connecting body 105 suspended in the housing 101, the connecting body 105 can be moved vertically above the arrangement position 209.
　However, as the arrangement position 209 approaches the outside of the reactor housing 101 in the radial direction, it becomes difficult to adjust the horizontal position of the connecting body 105 suspended in the reactor housing 101. In particular, as the position of the conversion unit 106 rises upward, the tendency becomes remarkable.
[0083]
　Therefore, in the moving step S51 according to some embodiments, the connecting body 105 is moved by using the lifting device 210 suspended from the hanging metal fitting 200 provided inside the catalyst reactor 10.
　As a result, the connecting body 105 can be easily moved within the reactor housing 101, and the work of attaching and detaching the connecting body 105 can be made more efficient.
　The lifting device 210 used here may be any of various lifting devices such as a chain block, a lever hoist, and an electric hoist.
[0084]
　In the moving step S51 according to some embodiments, specifically, the connecting body 105 suspended by an external lifting device that raises and lowers the connecting body 105 from the outside of the reactor housing 101 is more than the inlet opening 151. The reactor housing 101 is moved in the radial direction by using a lifting device 210 suspended from a hanging metal fitting 200 provided on the outer side in the radial direction of the reactor housing 101.
　As a result, even if the position of the inlet opening 151 formed at the top of the reactor housing 101 and the arrangement position 209 of the connecting body 105 to be attached / detached are displaced in the radial direction of the reactor housing 101, the inlet opening 151 By using the lifting device 210 suspended from the hanging metal fitting 200 provided on the outer side of the reactor housing 101 in the radial direction, the connecting body 105 can be easily moved in the radial direction of the reactor housing 101. As a result, the work of attaching and detaching the connecting body 105 can be made more efficient.
[0085]
　In the moving step S51 according to some embodiments, in the case of carrying-in work, by operating the external lifting device and the lifting device 210 in cooperation with each other, the inlet opening 151 is radially outside the position below the vertical direction. The connecting body 105 is moved to.
　As a result, the connecting body 105 is moved in the radial direction of the reactor housing 101 by operating the external lifting device and the lifting device 210 suspended from the hanging metal fitting 200 in the reactor housing 101 in cooperation with each other. It becomes easy to move. As a result, the work of attaching and detaching the connecting body 105 can be made more efficient.
[0086]
　The catalyst reactor 10 according to some of the above-described embodiments is provided in the reactor housing 101 above the catalyst unit 104 and radially outside the reactor housing 101 with respect to the inlet opening 151. The hanging metal fitting 200 is provided.
　As a result, a lifting device 210 such as a chain block is suspended from the hanging metal fitting 200, and by using this lifting device 210, the connecting body 105 can be easily moved in the radial direction of the reactor housing 101. As a result, when the connecting body 105 is attached / detached, the attachment / detachment work can be made more efficient.
[0087]
　In the catalyst reactor 10 according to some of the above-described embodiments, the hanging metal fittings 200 are provided on the top of the reactor housing 101 and the peripheral wall (inner peripheral surface 101a) of the reactor housing 101.
　The installation position of the first hanging bracket 201 provided on the top of the reactor housing 101 and the installation position of the second hanging bracket 202 provided on the peripheral wall of the reactor housing 101 are the diameters of the reactor housing 101. The position of the direction is different. As described above, by appropriately using the hanging metal fittings 201 and 201 having different installation positions in the radial direction of the reactor housing 101, the connecting body 105 can be easily moved in the radial direction of the reactor housing 101. As a result, when the connecting body 105 is attached / detached, the attachment / detachment work can be made more efficient.
[0088]
　For example, as shown in FIG. 9, the connecting body 105 suspended by an external lifting device is moved in the radial direction of the reactor housing 101 by using the lifting device 210 suspended from the first suspension fitting 201. You may. For example, as shown in FIG. 10, the connecting body 105 suspended by an external lifting device is moved in the radial direction of the reactor housing 101 by using the lifting device 210 suspended from the second hanging bracket 202. You may.
　Further, for example, as shown in FIG. 11, the reactor housing is formed by using the lifting device 210 suspended from the first hanging metal fitting 201 and the lifting device 210 suspended from the second hanging metal fitting 202. It may be moved in the radial direction of 101.
[0089]
(Elevating Step S52) The
　elevating step S52 will be described. In the following description, the elevating step S52 in the carrying-in work will be mainly described. The work content carried out in the elevating step S52 in the carry-out work is the same as the work content carried out in the elevating step S52 in the carry-in work.
　In the elevating step S52, the connecting body 105, which is located vertically above the arrangement position 209 by carrying out the moving step S51, is lowered and placed on the support member 171.
　For example, as shown in FIGS. 9 and 10, when the connecting body 105 is suspended by the external lifting device and the lifting device 210, the external lifting device and the lifting device 210 are operated in cooperation with each other. Then, the connecting body 105 is lowered.
　For example, as shown in FIG. 9, when the hanging metal fitting 200 is located substantially vertically above the arrangement position 209, the connecting body 105 is connected by using only the lifting device 210 suspended from the hanging metal fitting 200. You may want to lower it down.
　Further, for example, as shown in FIG. 11, when the connecting body 105 is suspended by two lifting devices 210, the connecting body 105 can be lowered by operating the two lifting devices 210 in cooperation with each other. Take it down to.
[0090]
　The present invention is not limited to the above-described embodiment, and includes a modification of the above-described embodiment and a combination of these embodiments as appropriate.
　For example, in some of the above-described embodiments, a pressure of about 2 to 4 MPa acts as an internal pressure on the catalyst reactor 10. Therefore, the catalyst reactor 10 according to some embodiments can be used in a state where a pressure of about 2 to 4 MPa acts as an internal pressure at a gauge pressure. However, the method of attaching and detaching the catalyst unit according to at least one embodiment of the present invention is, for example, a reactor housing configured so that a gas having a gauge pressure of 0.2 MPa or more is introduced into the inside. From the viewpoint of ensuring strength, the catalyst unit may be applied to a method of taking in and out of the container when the opening provided in the container is restricted.
[0091]
　In some of the above-described embodiments, the shape of the catalyst unit 104 when viewed from above and below is rectangular. However, the shape of the catalyst unit 104 when viewed from above and below may be a polygon other than a rectangle. That is, the catalyst unit 104 may have a polygonal column shape other than a quadrangular prism. For example, the catalyst unit 104 may have a triangular prism shape or a hexagonal prism shape. Further, the shape of the catalyst unit 104 when viewed from above and below may be circular or elliptical. That is, the catalyst unit 104 may have a cylindrical shape or an elliptical pillar shape.
[0092]
　In some of the above-described embodiments, the conversion unit 106 includes a plurality of connections 105, but the number of connections 105 included in one conversion unit 106 may be at least one.
Description of the sign
[0093]
10 Catalyst reactor
101 Reactor housing
102 Catalyst
104 Catalyst unit
105 Connector
106 Converter
107 Casing
130 Seal plate
151 Flow port (inlet opening)
152 Rectifier
153 Flow port (outlet opening)
154 Manhole
171 Support member
191 Introductory tube
200 Hanging bracket
201 1st hanging bracket
202 2nd hanging bracket
210 Lifting device
The scope of the claims
[Claim 1]
　It is a method of attaching and detaching the catalyst unit housed in the reactor housing of the catalyst reactor so that it has
　a cylindrical shape extending in the vertical direction and a gas having a gauge pressure of 0.2 MPa or more is introduced inside. relative to the reactor housing is configured to, when said mounting and demounting the catalyst unit, the step of passing said catalyst unit in said reactor housing flow port of the gas formed in the top portion of
provided with a
catalyst unit How to put on and take off.
[Claim 2]
　The flow port exhibits a circular shape,
　wherein the catalyst unit has a quadrangular prism shape,
　the dimensions of the diagonal in a cross section perpendicular to the extending direction of the quadrangular prism shape is smaller than an inner diameter of the flow port
claims Item 2. The method for attaching / detaching a catalyst unit according to Item 1.
[Claim 3]
　A claim
further comprising a step of attaching / detaching a seal plate that closes between the upper outer periphery of the casing of the catalyst unit and the inner circumference of the reactor housing when the catalyst unit is attached / detached to / from the reactor housing.
The method for attaching / detaching a catalyst unit according to 1 or 2.
[Claim 4]
　The method for attaching / detaching a catalyst unit according to claim 3,
further comprising a step of passing each of the seal plates divided into a plurality of parts through the distribution port
.
[Claim 5]
　The method for attaching / detaching a catalyst unit according to any one of claims 1 to 4,
further comprising a step of moving the catalyst unit using a lifting device suspended from a hanging metal fitting provided inside the catalyst reactor.
..
[Claim 6]
　In the step of moving the catalyst unit using the lifting device, the catalyst unit suspended by an external lifting device that raises and lowers the catalyst unit from the outside of the reactor housing is moved from the flow port to the above. The
method for attaching / detaching a catalyst unit according to claim 5, wherein the catalyst unit is moved in the radial direction of the reactor housing by using the lifting device suspended from the hanging metal fittings provided on the outer side in the radial direction of the reactor housing .
[Claim 7]
　When the catalyst unit is installed in the reactor housing, in the step of moving the catalyst unit using the lifting device, the external lifting device and the lifting device are operated in cooperation with each other. The
method for attaching / detaching a catalyst unit according to claim 6, wherein the catalyst unit is moved outward in the radial direction from a position below the vertical direction of the distribution port .
[Claim 8]
　The catalyst unit
　has a cylindrical shape extending in the vertical direction, and is configured so that a gas with a gauge pressure of 0.2 MPa or more is introduced inside, and a flow port for the gas is formed at the top of the catalyst. a reactor enclosure for housing units,
　the is above a than the catalyst unit in the reactor housing, and, a hanger disposed radially outwardly of said reactor housing than said flow port
to Equipped with a
catalytic reactor.
[Claim 9]

The catalytic reactor according to claim 8, 　wherein the hanging metal fitting is provided on the top of the reactor housing and the peripheral wall of the reactor housing .