Title of the invention: Energy gas refined wastewater treatment apparatus and energy gas refined wastewater treatment method
Technical field
[0001]
　The present disclosure relates to an energy gas refined wastewater treatment apparatus and a method for treating energy gas refined wastewater.
Background technology
[0002]
　Energy gas (gasified gas of hydrocarbon) obtained by gasifying hydrocarbons such as coal, biomass, and heavy oil includes carbon monoxide, hydrogen, and the like. Therefore, the energy gas can be used as a fuel for, for example, a gas turbine. However, with the gasification of hydrocarbons, the energy gas contains components such as ammonia. Therefore, for example, before using the energy gas as the fuel, it is preferable to purify the energy gas to remove components such as ammonia in the energy gas.
[0003]
　As a technique for purifying energy gas, the technique described in Patent Document 1 is known. Patent Document 1 describes that ammonia in an energy gas is removed by a washing tower (particularly, see paragraph 0015). Further, it is described that the wastewater in the washing tower is adjusted to the pH on the alkaline side in the pH adjusting tank and then supplied to the stripper (particularly, see paragraph 0018). Then, in the stripper, it is described that ammonia is separated as a gas by depressurizing and heating the waste water (see paragraph 0023 in particular).
Prior art literature
Patent documents
[0004]
Patent Document 1: Japanese Unexamined Patent Publication No. 2006-232904
Outline of the invention
Problems to be solved by the invention
[0005]
　Carbon dioxide in the air is usually dissolved in wastewater from an energy gas purification device such as a water washing tower. Therefore, wastewater contains carbonic acid. However, the technique described in Patent Document 1 does not consider carbonic acid in wastewater. Therefore, the pH of the wastewater becomes small due to the carbonic acid in the wastewater, and the amount of the alkaline agent added to make the pH of the wastewater alkaline increases.
[0006]
　At least one embodiment of the present invention relates to an energy gas refined wastewater treatment apparatus capable of reducing the amount of an alkaline agent added and a method for treating energy gas refined wastewater.
[0007]
　(1) The energy gas purified wastewater treatment apparatus according to at least one embodiment of the present invention is a wastewater treatment apparatus that is
　wastewater generated by energy gas purification and contains at least ammonium ions and chloride ions, and is
　described above. A decompression facility for depressurizing
　wastewater, an alkali agent addition facility for adding an alkaline agent to the wastewater after decompression , and
　an ammonia dissipation facility for dissipating ammonia in the wastewater after the addition of the alkali agent. ,
　It is characterized in that.
[0008]
　According to the configuration of (1) above, in the decompression equipment, carbonic acid in wastewater can be released to the gas phase as carbon dioxide. As a result, the pH of wastewater can be increased, and the amount of alkaline agent added for ammonia emission can be suppressed.
[0009]
　(2) In some embodiments, in the configuration of (1) above, the
　decompression facility includes a decompression vessel having an internal space for reducing the pressure of the wastewater to be lower than the pressure on the upstream side of the decompression facility.
　The decompression container has
　a drainage introduction port for introducing the drainage into the
　internal space, an alkaline agent introduction port for introducing the alkaline agent into the internal space, and the
　drainage after decompression containing the alkaline agent.
　It is characterized by being provided with a drainage outlet for extraction .
[0010]
　According to the configuration (2) above, an alkaline agent can be added to the wastewater after carbon dioxide is released by decompression in the internal space of the decompression container. This makes it easier to mix the wastewater and the alkaline agent in the internal space. In addition, it is possible to lengthen the time from the addition of the alkaline agent in the decompression vessel to the ammonia dissipation equipment arranged after the decompression equipment. As a result, it is possible to promote the mixing of the alkaline agent in the wastewater before reaching the ammonia emission facility.
[0011]
　(3) In some embodiments, in the configuration of (2) above, the
　decompression equipment is configured to reduce the pressure in the internal space to a target pressure equal to or higher than atmospheric pressure
　.
[0012]
　According to the configuration of (3) above, when the pressure is reduced from a high pressure above the target pressure to a target pressure set above the atmospheric pressure, gas and liquid can coexist in the internal space, and the wastewater after decompression containing an alkaline agent can be discharged. It can be easily pulled out.
[0013]
　(4) In some embodiments, in any one of the above (1) to (3), the
　alkaline agent addition equipment has the alkaline agent inside the connecting pipe between the decompression equipment and the ammonia dissipating equipment.
　It is characterized in that it is configured to add .
[0014]
　According to the configuration of (4) above, a pipe for supplying an alkaline agent can be connected to the connection pipe. As a result, the alkaline agent addition equipment can be easily retrofitted.
[0015]
　(5) In some embodiments, in the configuration of any one of (1) to (4)
　above, a pH meter for measuring the pH of the wastewater after the emission and the
　amount of the alkaline agent added are used. A control device for controlling is provided, and the
　control device is configured to control the addition amount of the alkaline agent based on the pH measured by the pH meter
　.
[0016]
　According to the configuration of (5) above, the time from the addition of the alkaline agent to the pH measurement can be lengthened. Thereby, the mixing of the alkaline agent in the wastewater can be promoted between the addition of the alkaline agent and the pH measurement, and the stability of the measurement can be improved.
[0017]
　(6) In some embodiments, in the configuration of (5) above, the
　control device controls the addition amount of the alkaline agent so that the pH measured by the pH meter is 8 or more and 12 or less.
　It is characterized by being configured to do so .
[0018]
　According to the configuration of (6) above, the pH of wastewater can be made alkaline to promote the emission of ammonia.
[0019]
　(7) In some embodiments, in any one of the above (1) to (6), the
　ammonia dissipating equipment includes a heating equipment for heating the wastewater after the addition of the alkaline agent.
　It is characterized by that.
[0020]
　According to the configuration of (7) above, the emission of ammonia can be promoted by heating.
[0021]
　(8) In some embodiments, in the above configuration (7),
　said heating equipment comprises a heat exchanger for performing heat exchange between the waste water and the heating gas after the addition of the alkali agent
　, characterized in that And.
[0022]
　According to the configuration of (8) above, the wastewater can be heated even when the drainage flow rate is large.
[0023]
　(9) In some embodiments, in the above configuration (7) or (8),
　said heating equipment comprises a steam injection device for injecting steam into the waste water after addition of the alkali agent
　, characterized in that And.
[0024]
　According to the configuration of (9) above, the wastewater can be quickly heated by contact with the steam injected into the heating equipment.
[0025]
　(10) In some embodiments, in the configurations (7) to (9), the
　heating facility includes a tower-shaped container, and the
　tower-shaped container
　introduces the wastewater after the addition of the alkaline agent. An introduction port for the
　purpose, a heating unit for heating the introduced drainage, a
　drainage outlet for extracting
　the heated drainage, and a gas outlet for extracting ammonia released by heating the drainage.
　It is characterized by being prepared .
[0026]
　According to the configuration (10) above, the amount of wastewater that can be heated at one time in the tower type container can be increased to promote the emission of ammonia.
[0027]
　(11) processing method energy gas purification wastewater according to at least one embodiment of the present invention,
　there is provided a method of processing at least including drainage and drainage in a by ammonium ions generated and chloride ions by energy gas purification,
　the a depressurizing step of depressurizing the effluent,
　and alkaline agent addition step of adding an alkali agent to the wastewater after the decompression,
　the ammonia stripping step of stripping ammonia in the waste water after the addition of the alkaline agent, including
　the feature that To do.
[0028]
　According to the method (11) above, carbonic acid in wastewater can be released to the gas phase as carbon dioxide by reducing the pressure. As a result, the pH of wastewater can be increased, and the amount of alkaline agent added for ammonia emission can be suppressed.
Effect of the invention
[0029]
　According to at least one embodiment of the present invention, it is possible to provide an energy gas purified wastewater treatment apparatus and a method for treating energy gas purified wastewater, which can reduce the amount of an alkaline agent added.
A brief description of the drawing
[0030]
FIG. 1 is a system diagram showing an energy gas purified wastewater treatment apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart showing a method for treating energy gas purified wastewater according to an embodiment of the present invention.
FIG. 3 is a system diagram showing a treatment apparatus for energy gas purified wastewater according to two embodiments of the present invention.
FIG. 4 is a system diagram showing an energy gas purified wastewater treatment apparatus according to three embodiments of the present invention.
FIG. 5 is a system diagram showing a treatment apparatus for energy gas purified wastewater according to four embodiments of the present invention.
FIG. 6 is a system diagram showing a treatment apparatus for energy gas purified wastewater according to five embodiments of the present invention.
Mode for carrying out the invention
[0031]
　Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the contents described as the embodiments below or the contents described in the drawings are merely examples, and can be arbitrarily modified and implemented without departing from the gist of the present invention. In addition, each embodiment can be implemented in any combination of two or more. Further, in each embodiment, the common members shall be designated by the same reference numerals, and duplicate description will be omitted for simplification of description.
[0032]
　Further, the dimensions, materials, shapes, relative arrangements, etc. of the components described as the 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 existing state.
　For example, an 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 in which 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.
[0033]
　FIG. 1 is a system diagram showing an energy gas purified wastewater treatment device 100 (hereinafter, simply referred to as a treatment device 100) according to an embodiment of the present invention. The treatment device 100 is for treating wastewater generated by energy gas purification and containing at least ammonium ions and chloride ions. The energy gas referred to here includes a gasified gas obtained by gasifying hydrocarbons such as coal, biomass, and heavy oil. Further, the wastewater generated by the energy gas refining is discharged from the energy gas refining apparatus 1 composed of, for example, a scrubber, and is usually acidic.
[0034]
　The processing device 100 includes a depressurizing facility 10, an alkaline agent adding facility 20, and an ammonia dissipating facility 30. The decompression equipment 10 is for decompressing the waste water discharged from the energy gas purification device 1. Further, the alkaline agent addition equipment 20 is for adding an alkaline agent to the wastewater after the depressurization. The ammonia dissipating facility 30 is for dissipating ammonia in the waste water after adding the alkaline agent. Of these, the alkaline agent addition equipment 20 is connected to the alkaline agent introduction port 13 (described later) of the decompression equipment 10. Further, the ammonia dissipating equipment 30 is connected to the drainage outlet 14 (described later) of the decompression equipment 10.
[0035]
　The decompression equipment 10 includes a decompression vessel 11 having an internal space 11a for decompressing the pressure of the waste water discharged from the energy gas purification device 1 with respect to the pressure on the upstream side of the decompression equipment 10. The decompression container 11 is composed of, for example, a decompression drum.
[0036]
　The pressure on the upstream side of the decompression equipment 10 is the pressure inside the pipes constituting the drainage introduction system 2 (described later), and is, for example, 2 MPaG to 4 MPaG. Therefore, the pressure in the internal space 11a of the decompression equipment 10 is lower than the pressure inside the pipe (the pressure on the upstream side of the drainage introduction port 12 described later). Specifically, although details will be described later, the pressure in the internal space 11a is, for example, about 0.01 MPaG to 0.1 MPaG. As a result, the drainage introduced into the internal space 11a through the pipe is depressurized. By reducing the pressure of the wastewater in the internal space 11a, carbonic acid contained in the liquid wastewater is easily released to the gas phase as carbon dioxide, and carbonic acid can be easily removed from the wastewater.
[0037]
　The decompression container 11 has a drainage introduction port 12 for introducing drainage into the internal space 11a, an alkaline agent introduction port 13 for introducing an alkaline agent into the internal space 11a, and a drainage after decompression containing the alkaline agent. The drainage outlet 14 and the gas outlet 23 for extracting the gas containing carbon dioxide to the outside of the decompression container 11 are provided.
[0038]
　The drainage introduction port 12 is connected to the energy gas purification device 1 by, for example, a drainage introduction system 2 composed of pipes. The drainage introduction system 2 includes an opening degree adjusting valve 3 for controlling the amount of drainage introduced into the decompression equipment 10, and a flow meter 5 for measuring the flow rate of the drainage flowing through the drainage introduction system 2. Then, a control device (not shown) controls the opening degree of the opening degree adjusting valve 3 so that the flow rate measured by the flowmeter 5 becomes constant. As a result, the wastewater is introduced into the decompression equipment 10 so that the amount of the wastewater introduced into the decompression equipment 10 becomes constant. The drainage inlet 12 is composed of, for example, a nozzle (not shown).
[0039]
　The alkaline agent introduction port 13 is connected to the alkaline agent addition equipment 20 by, for example, an alkaline agent introduction system 22 composed of pipes. Therefore, in the decompression equipment 10, the wastewater is decompressed and the alkaline agent is added to the decompressed wastewater. By adding an alkaline agent to the wastewater, the pH of the wastewater can be made alkaline. As a result, the ammonium ions in the wastewater can be changed to ammonia, and the emission of ammonia to the gas phase can be promoted in the ammonia emission facility 30 in the subsequent stage. The alkaline agent introduction port 13 is composed of, for example, a nozzle (not shown) arranged below the liquid surface of the internal space 11a.
[0040]
　The alkaline agent supplied by the alkaline agent addition equipment 20 includes, for example, an aqueous solution of sodium hydroxide, an aqueous solution of potassium hydroxide, and the like. The alkaline agent addition equipment 20 includes an alkaline agent tank 21 and an alkaline agent introduction system 22 for storing the alkaline agent introduced into the decompression equipment 10, and a pump for flowing the alkaline agent into the alkaline agent introduction system 22 (not shown). )including.
[0041]
　The drainage outlet 14 is connected to the ammonia emission facility 30 by, for example, a drainage drainage system 33 composed of pipes. The drainage extraction system 33 includes an opening degree adjusting valve 34 for controlling the amount of drainage extracted from the decompression equipment 10. Further, the decompression equipment 10 includes a liquid level gauge 15 for measuring the liquid level of the wastewater existing in the internal space 11a. Then, a control device (not shown) controls the opening degree of the opening degree adjusting valve 34 so that the liquid level measured by the liquid level gauge 15 becomes constant. As a result, drainage is extracted from the decompression equipment 10 so that the amount of drainage extracted from the decompression equipment 10 becomes constant.
[0042]
　The gas outlet 23 is connected to the outside of the processing device 100 by, for example, a gas extraction system 16 composed of pipes. Therefore, the gas generated in the internal space 11a of the decompression container 11 is supplied to, for example, a combustor (not shown) through the gas extraction system 16 and burned in the combustor. The gas generated in the internal space 11a contains carbon dioxide released to the gas phase by decompression and ammonia in the waste water also released to the gas phase by decompression.
[0043]
　Since it is difficult for the alkaline agent to spread throughout the wastewater immediately after the alkaline agent is added in the internal space 11a, the pH of the wastewater in the internal space 11a may vary greatly depending on the location. Therefore, the amount of ammonia emitted from the wastewater existing in the internal space 11a is usually not so large. On the other hand, in the ammonia dissipation facility 30 in which the wastewater in a state in which the alkaline agent is sufficiently mixed is introduced, the pH of the wastewater is generally high (for example, about 8 to 12), so that ammonium ions to ammonia (molecules) Conversion to is promoted, and heating promotes the emission of ammonia in wastewater. Therefore, most of the ammonia in the wastewater from the energy gas purification device 1 is usually dissipated in the ammonia dissipating facility 30.
[0044]
　The gas extraction system 16 includes an opening degree adjusting valve 17 for controlling the amount of gas extracted from the decompression equipment 10. Further, the decompression equipment 10 includes a pressure gauge 19 for measuring the pressure in the internal space 11a. Then, a control device (not shown) controls the opening degree of the opening degree adjusting valve 17 so that the pressure measured by the pressure gauge 19 becomes constant. As a result, gas is extracted from the decompression equipment 10 so that the pressure in the internal space 11a of the decompression equipment 10 becomes constant.
[0045]
　The decompression equipment 10 is configured to reduce the pressure in the internal space 11a to a target pressure equal to or higher than the atmospheric pressure (for example, about 0.01 MPaG to 0.1 MPaG as described above). The pressure can be adjusted to the target pressure by, for example, adjusting the opening degree of the opening degree adjusting valve 17. If necessary, a decompression pump (not shown) or the like may be used. By reducing the pressure in the internal space 11a to the target pressure, the pressure is reduced from a high pressure above the target pressure (for example, 2 MPaG to 4 MPaG) to a target pressure set above the atmospheric pressure (for example, 0.01 MPaG to 0.1 MPaG). Occasionally, gas and liquid can coexist in the internal space 11a, and drainage after decompression containing an alkaline agent can be easily extracted.
[0046]
　When the decompression equipment 10 includes the decompression container 11, an alkaline agent can be added to the wastewater after carbon dioxide is released by decompression in the internal space 11a of the decompression container 11. This makes it easier to mix the wastewater and the alkaline agent in the internal space 11a. Further, the time (residence time) from the addition of the alkaline agent in the decompression vessel 11 to the ammonia dissipation equipment 30 arranged after the decompression equipment 10 can be lengthened. As a result, the mixing of the alkaline agent in the wastewater can be promoted by the time the ammonia dissipating equipment 30 is reached.
[0047]
　The ammonia dissipating equipment 30 connected to the wastewater extraction system 33 includes a heating equipment 31 for heating the wastewater after the addition of the alkaline agent. Since the ammonia emission equipment 30 includes the heating equipment 31, the ammonia emission can be promoted by heating. The heating facility 31 is configured in a kettle type, for example, and includes a heat exchanger 32 for exchanging heat between the drainage after adding the alkaline agent and the heating gas. The heating gas includes, for example, steam. Since the heating facility 31 includes the heat exchanger 32, the drainage can be heated even when the drainage flow rate is large.
[0048]
　The heating facility 31 has a drainage introduction port 26 for introducing drainage after adding an alkaline agent, a gas outlet 25 for extracting gas containing ammonia released by heating the drainage, and a drainage outlet 25 for extracting the drainage after heating. Includes drainage outlet 24. The drainage introduction port 26 is connected to the drainage outlet 14 of the decompression equipment 10 through the drainage extraction system 33.
[0049]
　Further, the gas outlet 25 is composed of, for example, piping, and is connected to the outside of the processing device 100 by the gas extraction system 36. Therefore, the gas containing ammonia and the like generated in the heating facility 31 is supplied to, for example, a combustor (not shown) through the gas extraction system 36, and is burned in the combustor.
[0050]
　Further, the drainage outlet 24 is connected to the outside of the treatment device 100 by, for example, a drainage extraction system 37 composed of pipes. Therefore, the wastewater after heating in the heating equipment 31 (including, for example, anions such as chloride ions) is supplied to the wastewater treatment equipment (not shown) through the wastewater extraction system 37. At this time, the drainage after heating flows through the drainage extraction system 37 by driving the pump 38 included in the drainage extraction system 37. Further, the heated wastewater is radiated by the heat exchanger 39 included in the wastewater extraction system 37, and then supplied to the wastewater treatment facility.
[0051]
　According to the above-mentioned processing apparatus 100, in the decompression equipment 10, carbonic acid in wastewater can be released to the gas phase as carbon dioxide. As a result, the pH of wastewater can be increased, and the amount of alkaline agent added for ammonia emission can be suppressed.
[0052]
　The ammonia dissipating equipment 30 may be provided with a bubbling device (not shown) for dissipating ammonia by, for example, bubbling, instead of the heating equipment 31 described above.
[0053]
　FIG. 2 is a flowchart showing a method for treating energy gas purified wastewater according to an embodiment of the present invention. The flowchart shown in FIG. 2 is executed, for example, in the processing device 100 described above. Therefore, FIG. 2 will be described with reference to FIG. 1 as appropriate.
[0054]
　The method for treating energy gas purified wastewater according to an embodiment of the present invention (hereinafter, simply referred to as the treatment method for this embodiment) is wastewater generated by energy gas purification and containing at least ammonium ions and chloride ions. It is a processing method of. The treatment method of the present embodiment includes a depressurization step S1, an alkaline agent addition step S2, and an ammonia emission step S3.
[0055]
　The depressurization step S1 decompresses the waste water discharged from the energy gas purification apparatus 1 composed of, for example, a scrubber. The decompression step S1 is performed in the decompression equipment 10. By reducing the pressure, carbonic acid contained in the liquid wastewater is easily released to the gas phase as carbon dioxide, and carbonic acid can be easily removed from the wastewater. In addition, ammonia (molecules) contained in wastewater can be easily released into the gas phase. The emitted gas such as carbon dioxide and ammonia is burned in, for example, a combustor (not shown).
[0056]
　In the alkaline agent addition step S2, the alkaline agent is added to the waste water after depressurization. The alkaline agent addition step S2 can be performed, for example, by adding an alkaline agent to the decompressed wastewater in the internal space 11a of the decompression equipment 10. By adding an alkaline agent to the wastewater, the pH of the wastewater can be made alkaline. As a result, the ammonium ions in the waste water can be changed to ammonia (molecules), and the emission of ammonia to the gas phase can be promoted in the ammonia emission step S3 described later.
[0057]
　Ammonia release step S3 dissipates ammonia in the waste water after adding the alkaline agent. Ammonia can be dissipated, for example, by heating the waste water in the heating facility 31. By heating, ammonia in wastewater can be easily dissipated to the gas phase. The emitted gas such as ammonia is burned in, for example, a combustor (not shown).
[0058]
　According to the treatment method of the present embodiment, carbonic acid in wastewater can be released to the gas phase as carbon dioxide by reducing the pressure. As a result, the pH of wastewater can be increased, and the amount of alkaline agent added for ammonia emission can be suppressed.
[0059]
　FIG. 3 is a system diagram showing an energy gas purified wastewater treatment device 200 (hereinafter, simply referred to as a treatment device 200) according to two embodiments of the present invention. The ammonia dissipating equipment 30 of the treatment apparatus 200 includes a heating equipment 31 for heating the waste water after adding the alkaline agent, similarly to the ammonia dissipating equipment 30 in the processing apparatus 100 described above. However, the heating equipment 31 of the processing apparatus 200 includes a tower-shaped container 40 made of, for example, an ammonia stripper or the like. The tower-shaped container 40 has an internal space 40a for heating the waste water by the heating unit 47 (described later).
[0060]
　The tower-shaped container 40 has an introduction port 41 for introducing drainage after addition of an alkaline agent, a heating unit 47 for heating the introduced drainage, a drainage outlet 42 for extracting the heated drainage, and drainage. It is provided with a gas outlet 43 for extracting ammonia released by heating. Of these, the heating unit 47 is composed of, for example, a heat exchanger, and is adapted to exchange heat between the drainage after the addition of the alkaline agent and the heating gas. The heating gas includes, for example, steam. Since the tower-shaped container 40 includes a heat exchanger, the wastewater can be heated even when the drainage flow rate is large.
[0061]
　Further, a gas outlet system 36 is connected to the gas outlet 43 of the tower container 40. The gas extraction system 36 includes an opening degree adjusting valve 45 for controlling the amount of gas extracted from the heating equipment 31. Further, the tower type container 40 includes a pressure gauge 44 for measuring the pressure in the internal space 40a. Then, a control device (not shown) controls the opening degree of the opening degree adjusting valve 45 so that the pressure measured by the pressure gauge 44 becomes constant. As a result, gas is extracted from the tower-shaped container 40 so that the pressure in the internal space 40a of the tower-shaped container 40 becomes constant. It is preferable that the pressure in the internal space 40a is in the same pressure range as the internal space 11a of the decompression equipment 10 and is higher than the pressure in the gas extraction system 36.
[0062]
　When the heating facility 31 includes the tower-shaped container 40, the amount of wastewater that can be heated at one time in the tower-shaped container 40 can be increased, and the emission of ammonia can be promoted.
[0063]
　FIG. 4 is a system diagram showing the energy gas purified wastewater treatment device 300 (hereinafter, simply referred to as the treatment device 300) according to the three embodiments of the present invention. The heating equipment 31 of the processing device 300 includes a steam injection device 51 for injecting steam into the wastewater after the addition of the alkaline agent. The steam produced in the steam injection device 51 is injected into the internal space 40a of the tower container 40 through the steam injection system 52.
[0064]
　Since the heating equipment 31 includes the steam injection device 51, the wastewater can be quickly heated by contact with the steam injected into the internal space 40a of the heating equipment 31.
[0065]
　FIG. 5 is a system diagram showing a treatment device 400 (hereinafter, simply referred to as a treatment device 400) for energy gas purified wastewater according to four embodiments of the present invention. The treatment device 400 includes a pH meter 61 for measuring the pH of waste water after ammonia emission and a control device 60 for controlling the amount of the alkaline agent added. Then, the control device 60 is configured to control the amount of the alkaline agent added based on the pH measured by the pH meter 61.
[0066]
　By doing so, the drainage after the addition of the alkaline agent flows through the drainage outlet 14, the drainage extraction system 33, the heating facility 31 and the drainage extraction system 37 in this order, and the drainage flowing through the drainage extraction system 37 The pH is measured. Therefore, the time (residence time) from the addition of the alkaline agent to the pH measurement can be lengthened. Thereby, the mixing of the alkaline agent in the wastewater can be promoted between the addition of the alkaline agent and the pH measurement, and the stability of the measurement can be improved.
[0067]
　The wastewater extraction system 37 includes a pH meter 61 for measuring the pH of the wastewater after the emission of ammonia. Further, the alkaline agent introduction system 22 included in the alkaline agent addition equipment 20 includes an opening degree adjusting valve 62 for controlling the amount of the alkaline agent added to the pressure reducing equipment 10.
[0068]
　The control device 60 is configured to control the amount of the alkaline agent added by adjusting the opening degree of the opening degree adjusting valve 62 so that the pH measured by the pH meter 61 is 8 or more and 12 or less. By doing so, the pH of the waste water can be made alkaline and the emission of ammonia can be promoted.
[0069]
　FIG. 6 is a system diagram showing the energy gas purified wastewater treatment device 500 (hereinafter, simply referred to as the treatment device 500) according to the five embodiments of the present invention. In the treatment device 500, unlike the above treatment devices 100 to 400, the alkaline agent introduction system 22 is connected to the wastewater extraction system 33. Therefore, the alkaline agent addition equipment 20 in the processing device 500 is configured to add the alkaline agent to the inside of the connection pipe (drainage extraction system 33) between the decompression equipment 10 and the ammonia dissipation equipment 30.
[0070]
　By adding an alkaline agent to the inside of the connecting pipe (drainage extraction system 33) between the decompression equipment 10 and the ammonia dissipating equipment 30, the alkaline agent is supplied to the connecting pipe when the alkaline agent adding equipment 20 is installed later. Can be connected to the piping for. As a result, the alkaline agent addition equipment 20 can be easily retrofitted.
Code description
[0071]
1 Energy gas purification device
2 Drainage introduction system
3,17,34,45,62 Opening adjustment valve
5 Flowmeter
10 Decompression equipment
11 Decompression vessels
11a, 40a Internal space
12,26 Drainage introduction port
13 Alkaline agent introduction port
14,24 , 42 Drainage outlet
15 Liquid level gauge 16,36
Gas extraction system
19,44 Pressure gauge
20 Alkaline agent addition equipment
21 Alkaline agent tank
22 Alkaline agent introduction system
23,25,43 Gas outlet
30 Ammonia emission equipment
31 Heating equipment
32, 39 Heat exchanger
33 , 37 Drainage extraction system
38 Pump
40 Tower type container
41 Introductory port
47 Heating unit
51 Steam injection device
52 Steam injection system
60 Control device
61 pH meter
100, 200, 300, 400, 500 processing equipment
The scope of the claims
[Claim 1]
　A wastewater treatment device that is wastewater generated by energy gas purification and contains at least ammonium ions and chloride ions.
　A decompression facility for decompressing the
　wastewater and an alkaline agent added to the wastewater after decompression. An 　energy gas purified wastewater treatment apparatus
　comprising an alkali agent addition facility for the purpose of adding an alkali agent, and an ammonia dissipating facility for dissipating ammonia in the wastewater after the addition of the alkali agent
.
[Claim 2]
　The decompression facility includes a vacuum vessel having an interior space for vacuum to the upstream side pressure of said pressure drainage vacuum equipment,
　said vacuum vessel,
　draining the introduction for introducing the waste water into the inner space The 　first aspect of the present invention is characterized 　by including a
　port, an alkaline agent introduction port for introducing the alkaline agent into the internal space, and a
drainage outlet for extracting the drainage after depressurization containing the alkaline agent.
The energy gas purified wastewater treatment apparatus according to.
[Claim 3]

　The energy gas refined wastewater treatment apparatus according to claim 2, 　wherein the decompression facility is configured to reduce the pressure in the internal space to a target pressure equal to or higher than atmospheric pressure .
[Claim 4]
　The invention according to
　any one of claims 1 to 3, wherein the alkaline agent adding equipment is configured to add the alkaline agent to the inside of a connecting pipe between the depressurizing equipment and the ammonia dissipating equipment. Energy gas refined wastewater treatment equipment.
[Claim 5]
　A pH meter for measuring the pH of the wastewater after the emission and
　a control device for controlling the amount of the alkaline agent added are provided, and the
　control device is based on the pH measured by the pH meter.
　The energy gas purified wastewater treatment apparatus according to any one of claims 1 to 4 , wherein the amount of the alkaline agent added is controlled .
[Claim 6]
　The control device according to claim 5, wherein the control device is configured to control the addition amount of the alkaline agent so that the pH measured by the pH meter is 8 or more and 12 or less
　. Energy gas refined wastewater treatment equipment.
[Claim 7]

　The energy gas purified wastewater treatment apparatus according to any one of claims 1 to 6, 　wherein the ammonia dissipating equipment includes a heating equipment for heating the wastewater after the addition of the alkaline agent. ..
[Claim 8]

　The energy gas refined wastewater treatment apparatus according to claim 7, 　wherein the heating equipment includes a heat exchanger for heat exchange between the wastewater and the heating gas after the addition of the alkaline agent .
[Claim 9]

　The energy gas refined wastewater treatment apparatus according to claim 7 or 8, 　wherein the heating equipment includes a steam injection device for injecting steam into the wastewater after the addition of the alkaline agent .
[Claim 10]
　The heating equipment includes a tower type container,
　the tower type container,
　and the alkali agent inlet for introducing the waste water after the addition port,
　and a heating unit for heating the waste water introduced,
　and heated above 　The energy gas according to any one of claims 7 to 9 , further
　comprising a drainage outlet for extracting wastewater and a gas outlet for extracting ammonia released by heating the wastewater.
Purified wastewater treatment equipment.
[Claim 11]
　A method for treating wastewater generated by energy gas purification and containing at least ammonium ions and chloride ions, which is
　a depressurization step for
　depressurizing the wastewater and an alkaline agent for adding an alkaline agent to the wastewater after decompression. A 　method for treating energy gas purified wastewater
　, which comprises an addition step and an ammonia emission step for dissipating ammonia in the wastewater after the addition of the alkaline agent
.
Scope of amended claims (Article 19 of the Convention)
[December 11, 2019 (11.12.2019) Accepted by the International Bureau]
[1]
　A wastewater treatment device that is wastewater generated by energy gas purification and contains at least ammonium ions and chloride ions.
　A decompression facility for decompressing the
　wastewater and an alkaline agent added to the wastewater after decompression. An 　energy gas purified wastewater treatment apparatus
　comprising an alkali agent addition facility for the purpose of adding an alkali agent, and an ammonia dissipating facility for dissipating ammonia in the wastewater after the addition of the alkali agent
.
[2]
　The decompression facility includes a vacuum vessel having an interior space for vacuum to the upstream side pressure of said pressure drainage vacuum equipment,
　said vacuum vessel,
　draining the introduction for introducing the waste water into the inner space The 　first aspect of the present invention is characterized 　by including a
　port, an alkaline agent introduction port for introducing the alkaline agent into the internal space, and a
drainage outlet for extracting the drainage after depressurization containing the alkaline agent.
The energy gas purified wastewater treatment apparatus according to.
[3]

　The energy gas refined wastewater treatment apparatus according to claim 2, 　wherein the decompression facility is configured to reduce the pressure in the internal space to a target pressure equal to or higher than atmospheric pressure .
[Four]
[After correction]
　The energy gas according to claim 1, wherein the alkaline agent adding equipment is configured to add the alkaline agent to the inside of a connection pipe between the decompression equipment and the ammonia dissipating equipment. Purified wastewater treatment equipment.
[Five]
　A pH meter for measuring the pH of the wastewater after the emission and
　a control device for controlling the amount of the alkaline agent added are provided, and the
　control device is based on the pH measured by the pH meter.
　The energy gas purified wastewater treatment apparatus according to any one of claims 1 to 4 , wherein the amount of the alkaline agent added is controlled .
[6]
　The control device according to claim 5, wherein the control device is configured to control the addition amount of the alkaline agent so that the pH measured by the pH meter is 8 or more and 12 or less
　. Energy gas refined wastewater treatment equipment.
[7]

　The energy gas purified wastewater treatment apparatus according to any one of claims 1 to 6, 　wherein the ammonia dissipating equipment includes a heating equipment for heating the wastewater after the addition of the alkaline agent. ..
[8]

　The energy gas refined wastewater treatment apparatus according to claim 7, 　wherein the heating equipment includes a heat exchanger for heat exchange between the wastewater and the heating gas after the addition of the alkaline agent .
[9]

　The energy gas refined wastewater treatment apparatus according to claim 7 or 8, 　wherein the heating equipment includes a steam injection device for injecting steam into the wastewater after the addition of the alkaline agent .
[Ten]
　The heating equipment includes a tower type container,
　the tower type container,
　and the alkali agent inlet for introducing the waste water after the addition port,
　and a heating unit for heating the waste water introduced,
　and heated above 　The energy gas according to any one of claims 7 to 9 , further
　comprising a drainage outlet for extracting wastewater and a gas outlet for extracting ammonia released by heating the wastewater.
Purified wastewater treatment equipment.
[11]
　A method for treating wastewater generated by energy gas purification and containing at least ammonium ions and chloride ions, which is
　a depressurization step for
　depressurizing the wastewater and an alkaline agent for adding an alkaline agent to the wastewater after decompression. A 　method for treating energy gas purified wastewater
　, which comprises an addition step and an ammonia emission step for dissipating ammonia in the wastewater after the addition of the alkaline agent
.