Art
[1]The statement claims the benefit of priority based on the Korea Patent Application No. 10-2017-0136495 submitted to the Korea Intellectual Property Office on October 20 2017, and all information disclosed in the literature of the Korea patent application is included as part of the disclosure do.
[2]
The present invention relates to a feed spacer, and more specifically, by forming the set constituting the feed spacer in a three-layer structure, are set in contact with the reverse osmosis membrane and convection of the raw water into the middle of the feed spacer structure in the central laminar sex flow rate gradient is generated to reduce the polarization of the reverse osmosis filter module, to a reverse osmosis membrane filter module which comprises supplying a spacer having a three-layer structure that can minimize the pressure loss, and it.
[3]
BACKGROUND
[4]
Before getting the attention of alternative water resources technology, water purification technology that is globally intensifying water shortage due to global warming.
[5]
Thus, there is a water treatment process using a sea water desalination, the next generation may be utilized to replace the water, including water reuse core technology, reverse osmosis (Reverse osmosis membrane) of the project is expected to lead the water industry market.
[6]
Be transmitted through the reverse osmosis membrane by this reverse osmosis membrane is near the water in a pure water to infinitely pure water has been used in various fields such as sterile water or of a medical dialysis population of purified water, or the water for the electronics industry for manufacturing semiconductor.
[7]
Here, to generate a constant water level difference and separate the two solution in the semipermeable membrane, and the concentration difference Turan reverse movement after a certain period of time, the low concentration of the solution towards a higher concentration and this is called osmosis. In addition, the difference in water level resulting from this process is called reverse osmosis. Using this principle, only the water molecules to pass through the semipermeable membrane, and that the reverse osmosis plant apparatus for purifying water, the semipermeable membrane into herein is a reverse osmosis filter module.
[8]
The reverse osmosis filter module is configured to include a central tube, the spacer feed (Feed spacer), a reverse osmosis membrane (RO membrane), tricot filtered water.
[9]
Among these, the feed spacer performs the role that the raw water flows into the passage. When raw water is the pressure difference in the flow disturbance by the feed spacer in the case that flows generated through the feed spacer, which results in increase in energy costs, since, thereby, the lower is this pressure difference increases the efficiency of the reverse osmosis filter module.
[10]
On the other hand, the near inevitably reverse osmosis membrane by permeation and flux to the concentration polarization is generated to be the more severe, this phenomenon increases the osmotic pressure can transmittance is reduced in the vicinity of the reverse osmosis membrane.
[11]
In this regard, the situation is supplied to the spacer, which can increase the efficiency of the reverse osmosis filter module by mitigating the concentration polarization decreases the generation of the pressure difference necessary.
[12]
Detailed Description of the Invention
SUMMARY
[13]
The present invention has been conceived to solve the above problems, an object of the present invention, being composed of layers that are not in contact with the layer to be in direct contact with the reverse osmosis membrane, the thickness of the warp yarns to cause the pressure loss of the fluid decreases 3F to provide a feed spacer structure of the structure.
[14]
It is also an object of the present invention, three of the raw water is by convection to the center of the spacer structure, the only layer that is in direct contact with the reverse osmosis membrane is locally turbulent convection occurs and the spacer structure center is laminar St. velocity gradient occurs reducing the polarization to provide a feed spacer structure of a layer structure.
[15]
Problem solving means
[16]
Feed spacer having a three-layer structure in accordance with one embodiment of the present invention comprises a plurality of warp yarns (Strand) that is parallel to the first set; The second set is provided intersecting with the first set being constituted by a plurality of parallel warp yarns; And being parallel to the raw water direction, a third set consisting of a plurality of parallel warp yarns; any of including and the third set, the first between the first and second set, or said first and second sets one It characterized in that positioned on one side.
[17]
In one embodiment, the feed spacer, the number of warp yarns per unit length (Strand per inch, SPI) may be a 5 to 9.
[18]
In one embodiment, the distance between the intersection point of the first and second sets, characterized in that the 3,800㎛ to 12,000㎛.
[19]
In one embodiment, the angle between the first and the second set is characterized in that it is, 50 ° to 90 °.
[20]
In one embodiment, the warp yarns is characterized in that a diameter of 167㎛ to 300㎛.
[21]
In one embodiment, the feed spacer is characterized in that the 500㎛ to 900㎛ thickness.
[22]
Reverse osmosis filter module including a feed spacer having a three-layer structure in accordance with one embodiment of the present invention
[23]
In one embodiment, the reverse osmosis filter module comprising a tube opening for receiving the permeate sluggish in the longitudinal direction; And it extends outwardly from said tube at least one reverse osmosis membrane that is wound in the tube circumference; said spacer comprises a, is in contact with the one or more reverse osmosis membrane, characterized in that the take-up in the tube circumference.
[24]
In one embodiment, the spacer, the first to be formed of a third set, the first and second set, and the one in contact with the above reverse osmosis membrane, and the third set is characterized in that the at least one reverse osmosis membrane and the non-contact It shall be.
[25]
Effects of the Invention
[26]
According to the invention, the feed spacer is a by being composed of layers that are not in contact with the layer to be in direct contact with the reverse osmosis membrane, to concentrate the turbulent flow of the raw water to the center of the spacer structure is generated, the effect of minimizing the pressure loss.
[27]
According to the present invention, the effect of the raw water is by convection to the center of the spacer structure, the only layer that is in direct contact with the reverse osmosis membrane is locally turbulent daeryo occurs and to a laminar flow property velocity gradient occurs in the spacer structure center reduce polarization It is generated.
[28]
Brief Description of the Drawings
[29]
1 is a perspective view of a reverse osmosis filter module according to one embodiment of the present invention.
[30]
2 (a) is a plan view of a feed spacer having a three-layer structure in accordance with one embodiment of the present invention, FIG. 2 (b) is a reverse osmosis membrane on one side and the other side of the feed spacer of a three-layer structure in accordance with one embodiment of the present invention a cross-sectional view of the position of the reverse osmosis filter module.
[31]
3 is a cross-sectional view of the feed spacer of a three-layer structure according to another embodiment of the present invention.
[32]
4 (a) is a three-layer structure SPI 7 in accordance with one embodiment of the present is 4 (b) a plan view, a diagram of a feed spacer having a three-layer structure SPI 9 in accordance with one embodiment of the present invention invention a plan view of the feed spacer.
[33]
Mode for the Invention
[34]
Described in detail with reference to the accompanying drawings, the present invention. Here, the detailed description of the repeated description, known functions and configurations may unnecessarily obscure the subject matter of the present invention will be omitted. Embodiment of the invention is provided in order to fully describe the present invention to those having ordinary skill in the art. Therefore, the shape and size of the elements in the drawings may be exaggerated for more clear explanation.
[35]
In the specification, assuming that any part "includes" a certain component, which is not to exclude other components not specifically described against which means that it is possible to further include other components.
[36]
Or less, presents a preferred embodiment for better understanding of the present invention. However, the following examples are not limited to the context of the present invention by the intended addition, the examples provided in order to understand more easily the invention.
[37]
[38]

[39]
[40]
* 2 (a) is on one side and the other side of the feed spacer of a three-layer structure in accordance with one embodiment of a plan view of the feed spacer, and Fig. 2 (b) having a three-layer structure in accordance with one embodiment of the present invention, the present invention a cross-sectional view of the reverse osmosis membrane, the reverse osmosis filter module position. 3 is a cross-sectional view of the feed spacer of a three-layer structure according to another embodiment of the present invention. 4 (a) is a three-layer structure SPI 7 in accordance with one embodiment of the present is 4 (b) a plan view, a diagram of a feed spacer having a three-layer structure SPI 9 in accordance with one embodiment of the present invention invention a plan view of the feed spacer. Feed spacer in accordance with the present invention can be of a first set 10, second set 20 and the third set 30, which is a plurality of warp yarns (Stand) in parallel position.
[41]
[42]
There the first set 10 has one or more, a plurality of warp yarns can be positioned parallel to, in which warp yarns can be positioned obliquely with raw direction. A second set 20 may be positioned to cross the first set (10). The second set 20 includes a first set 10 and the inclination direction is located opposed to the first set 10 and second set 20 may be provided in a grid pattern.
[43]
In addition, the first set 10 may be located in 10 ° to 80 ° angle (a) from the direction of flow of the raw water, the second set 20 may be positioned in 100 ° to 170 ° inclination from the direction of flow of the raw water can. And, between the first set 10 and second set 20 angle (a) may be formed of a 50 ° to 90 °.
[44]
For example, a when tilted 60 ° formed from the flow direction of the warp are the raw water that comprise the first set (10), the warp yarns of the second set 20 will be positioned inclined with 110 ° to 150 ° from the flow direction of the raw water can.
[45]
That is, if the first set 10 and second set 20 between the angle of 50 ° one time, the turned 60 ° inclined from the flow direction of the warp are the raw water that comprise the first set (10) forming a second set ( 20) warp yarns can be positioned turned 110 ° from the inclined direction of flow of the raw water.
[46]
At this time, the first set 10 and second set 20, if the angle is less than 50 ° between, as the distance between the third set 30 to be described later becomes smaller, reducing the cross sectional area of ​​the flow path formed by the warp yarns and feed spacer may be a problem that polarization increases occur not a laminar flow property velocity gradient to occur in the central part, 90 ° greater than one if the third set (30) by a larger with distance, increasing the flow path cross-sectional area to the flow of the raw water up and down up briskly in the direction may cause a problem that the pressure loss increases. Here, the flow path may refer to the gap between the reverse osmosis membrane and of each set being located on the top and bottom of the feed spacers to be formed by the warp yarns that make up each set.
[47]
[48]
The third set 30 according to the present invention may be located at the top of and parallel to the direction of flow of the raw water between the first set 10 and second set 20, or three sets. That it is, can be set to any position of one of the one first set (10) side and a second set (20). When more specifically, a set of stacking sequence is a second set (20) positioned above the first set 10, a third set 30 is one of the second set 20, i.e., located at the upper It can be. And, a set of stacking sequence may be a third set (30) located at an upper first set (10) when the first set (10) positioned above the second set 20.
[49]
First, Referring to FIG. 1 (b), a third set (30) when positioned in the one side of the first set 10 and second set 20 another side, supplying a spacer is not in contact with the set that is in direct contact with the reverse osmosis membrane, in that the set can be configured. More specifically, the third set 30 is not in direct contact with the reverse osmosis membrane. A first set 10 and second set 20 is a structure that is in contact with the reverse osmosis membrane.
[50]
A first set 10 and second set 20 is in contact with the reverse osmosis membrane, and can serve for supporting the feed spacer structure, can be periodically convection to the center of the feed spacer structure the interface flow between the raw water with a reverse osmosis membrane, have. That is, the feed spacer in accordance with the present invention by convection to surface flow of the raw water in the third set (30) to generate a third set (30) is laminar St. velocity gradient of the surface flow (Flow Velocity Gradient) to reduce the polarization You may experience effects.
[51]
In addition, a third set 30 may be provided in any position of 1/5 to 4/5 point between the intersection or the junction and the junction of the first set 10 and second set 20.
[52]
Feed spacer in accordance with the present invention can be produced by a fusion method. The first set 10, second set 20 and the third set (30) or extruded to a bonded state, the first set 10 and the third set 30 or second set 20 and the after the third set (30) is extruded from a bonded state, and a second or a first set can be produced by the method to be laminated and bonded.
[53]
Next, the second by the third set 30 are parallel to the raw water flow direction flow Referring to FIG 3, the third set (30) which, located at the top when located at one side of the second set 20 in half It may serve to separate. Thus, the first set 10 to be in direct contact with the reverse osmosis membrane is and the convection of the raw water surface flows into the second set 20, a third set (30) to separate the raw water in half by convection to the second set 20 convection in the vicinity of the reverse osmosis membrane interface it is possible to minimize the pressure drop of the feed spacer in accordance with the present invention occurs on a periodic basis.
[54]
Distance between the warp yarns for forming the first to third sets (10, 20, 30) according to the present invention may be 4㎜ to 12㎜. Here, when the distance between the warp yarns is less than 4㎜, may cause problems that a pressure loss is increased by increasing the flow path cross-sectional area and reduce the gap between the warp yarns of each layer to the turbulent flow of the raw water occurs more than necessary. And, if the distance between the warp yarns 12㎜ exceeded, and to increase the spacing between the warp yarns and the upper and lower region the flow is not generated in the raw water occurs may result in a problem that laminar flow rate property gradient does not occur.
[55]
First to third sets (10, 20, 30) and the diameter of the warp yarns forming each set can be provided in 167㎛ to 300㎛, therefore, the thickness of the feed spacer in accordance with the present invention to 500㎛ 900㎛ characterized in that. The diameter of the warp yarns constituting the feed spacer in accordance with the present invention reduces the size of the warp in contact with the fluid may be provided narrower than the diameter of the warp yarns constituting a conventional feed spacer, the feed to the feed spacer by the diameter of the warp is narrowed and it may result in an effect that the pressure loss of the fluid can be reduced due to friction.
[56]
And the diameter of the warp yarns under 167㎛, if the feed spacer thickness 500㎛ less, can cause a problem that can not support the feed spacer structure. And, wherein the diameter of the warp threads exceeds 300㎛, supply if the spacer thickness 900㎛ exceeded, there is a problem that increase in the resistance and increase the pressure loss of the feed spacer may occur due to increased surface area in contact with the supplied raw water.
[57]
And, it is possible to secure a void ratio (Void Fraction) and an effective reverse osmosis membrane area (Effective Membrane Area) of being the present invention the diameter of the warp yarns in accordance with the decrease than the diameter of the warp yarns constituting a conventional feed spacer, the channel that the enemy can flow as well as improving foreclosure can cause effects on the improvement of the physical properties can be produced.
[58]
Feed spacer in accordance with the present invention may be from 5 to 9, the number of warp yarns per unit length (Strand per inch, SPI). In other words, the first set 10 and a distance (L) between a second set of intersection points (20) are formed to intersect the may be 3,800㎛ to 12,000㎛. Here, the number (SPI) of the warp per unit length may indicate the number of warp yarns per inch, corresponding to one side of the flow path. That is, the first set 10 and second set 20 and the third set (30) may mean the number of intersections between the warp yarns to form the cross.
[59]
If the SPI is greater than a distance between less than 5, the intersection 12,000㎛, reducing the cross sectional area of ​​the flow path and may cause a problem that the polarization does not occur a laminar St. velocity gradient increases from the central part supply spacer, SPI is greater than 9, If the distance between the intersections is less than 3,800㎛, increasing the cross sectional area of ​​the flow path and the flow of the raw water it may result in problems to get up vigorously in the vertical direction increases the pressure loss.
[60]
[61]

[62]
1 is a perspective view of a reverse osmosis filter module according to one embodiment of the present invention. Reverse osmosis filter module is a component of the membrane separation device that will serve to purify water using a practical reverse osmosis principle to be supplied with. Reverse osmosis filter module may include a reverse osmosis membrane 200, the feed spacer 100 and tube 400 for a tricot filtrate 300 and the length in a direction including the opening for receiving the permeate. Also, it may further include a pair of (not shown) anti-telescoping device, but detailed description thereof will be omitted.
[63]
One or more reverse osmosis membrane 200 functions as a flow path at the same time to filter the foreign substances contained in the water by using osmosis purified water so that the flow effectively. One or more reverse osmosis membrane this is to extend outward from the tube is wound into a tube circumference.
[64]
Feed spacer 100 may be provided with a feed spacer 100 in accordance with the present invention described above. A little more detail, feed spacer 100 may be provided in a three-layer structure, in which a third layer is a dog warp yarns 3 constituting the feed spacer 100 in the laminated structure, a plurality of warp yarns are located in parallel constructing a set of layers, and may refer to a form in which the three sets of stacked.
[65]
Feed spacer 100 may be provided by being divided into, and set that are not in contact with the set of reverse osmosis membrane 200, which is in contact with the reverse osmosis membrane 200, a three-layer structure. In one embodiment, the claim can be in contact with the first and second set of one or more reverse osmosis membrane 200, a third set may be non-contact and at least one reverse osmosis membrane (200). The set of contact with the reverse osmosis membrane 200 can convection to the direction of flow of the raw water fed to the reverse osmosis filter module, a central, i.e., the set that is not in contact with the reverse osmosis membrane 200 of the feed spacer 100. Thus, the polarization of the reverse osmosis membrane is laminar St. velocity gradient occurs, and the reverse osmosis membrane, only a set portion in contact with 200 to topically turbulent convection occurs feed spacer 100 in the portion of the non-contact set and the 200 position a can be reduced and by reducing the pressure loss increased the efficiency of the reverse osmosis filter module.
[66]
Feed spacer 100 forms a passage through which the raw water flows in from the outside, and performs a role of maintaining the interval between the one of the reverse osmosis membrane 200 and one of the reverse osmosis membrane (200). To this end, the feed spacer 100 is configured so as to contact at least one reverse osmosis membrane 200 and the upper and lower sides, and like the one or more reverse osmosis membrane (200) wound around the tube.
[67]
Here, the feed material for the spacer 100 is preferably though not specifically limited, polyethylene (Polyethylene), poly (vinyl chloride) composed of any one of (Polyvinyl chloride), polyester (Polyseter) and polypropylene (Polypropylene).
[68]
A tricot filtered water 300 generally has the structure of a fabric type, and performs the flow path serves to create an area with the purified water through a reverse osmosis membrane 200, can flow out.
[69]
At this time, a tricot filtered water 300 generally has the structure of a fabric type, and performs the flow path serves to create an area with the purified water through a reverse osmosis membrane (10) can flow out.
[70]
Tube 400 is positioned in the center of the reverse osmosis filter module, it is that the filtered water inlet passage and performs the role discharged.
[71]
To this end, it is preferable that the air gap (or opening) of a predetermined size formed in the outer side of the tube 400 is such that the filtrate flows. At this time, the air gap is preferably formed of one or more so that it can be efficiently introduced into the more the filtrate.
[72]
[73]

[74]
A conventional feed spacer was made of only the first set and the second set in a two-layer structure. Comparative Example 1 SPI 9, and the passage distance 3889㎛ flow direction and the first and the second angle is set forms is supplied to the spacer of the two-layer structure is 90 °, Comparative Example 2, SPI 7, the distance between the intersection point between the intersection 5000㎛ and the flow path direction of flow and the first and the second angle is set forms is supplied to the spacer of the two-layer structure is 90 °.
[75]
[76]

[77]
Examples 1 to 4 is a structure located in the middle (Middle) between a feed spacer having a three-layer structure, of Examples 1 to 3 is a third set of the first set and second set in accordance with the present invention. The flow path direction of flow and the first and the second angle is set forming a feed spacer was changed to SPI 9, 7 and 5 to the three-layer structure is 50 °, 55 ° and 90 °. Example 4 is a structure in which the third set is located at the top feed spacer. SPI passage 9 and the direction of flow and the first and the second angle is set forming a feed spacer is formed of 90 °.
[78]
[79]
TABLE 1
characteristic △ P / length (Pa / ㎛) Recovery / Length Cross_L(㎛) △P
Structure and mistakes me Flow direction angle
Example 1 9SPI 50 0.01442 7.81.E-05 6507 68% decrease
55 0.0156 7.75.E-05 5955 67% reduction
90 0.02051 7.77.E-05 3889 55% decrease
Example 2 7SPI 50 0.01107 7.91.E-05 8366 76% decrease
55 0.01140 7.95.E-05 7657 75% reduction
90 0.01504 7.88.E-05 5000 67% reduction
Example 3 5SPI 50 0.00856 8.04.E-05 111712 81% decrease
55 0.00878 8.06.E-05 10720 81% decrease
90 0.0109 8.10.E-05 7000 76% decrease
Example 4 9SPI 90 0.0280 7.73.E-05 3889 39% decrease
Comparative Example 1 9SPI 90 0.0456 7.90.E-05 3889 Reference
Comparative Example 2 7SPI 90 0.0335 7.90.E-05 5000 27% reduction

[80]
[81]
Example 1 Comparative Example 1 was the differential pressure of the feed spacers per unit length as compared to (Pa / ㎛) is reduced than in Comparative Example 1 0.02051 0.0456, thus supplying the entire spacer pressure it is decreased 55% compared to Comparative Example 1. Fig. That is, the three-layer structure may be seen that the pressure generated between the raw water and supply a spacer in comparison with the two-layer structure decreases.
[82]
Then, the SPI can be the same as the pressure difference per length decreased with decrease in the flow direction angle and found that the increase in the differential pressure reduction in the total feed spacer.
[83]
[84]
Wherein in a preferred embodiment has been with reference to describe, to vary the invention within the scope not departing from the spirit and scope of the invention as set forth in the claims below are those skilled in the art modifications and variations of the present invention it will be appreciated that it can be.

Claims

[Claim 1]A plurality of warp yarns (Strand) that is parallel to the first set; The second set is provided intersecting with the first set being constituted by a plurality of parallel warp yarns; And being parallel to the raw water direction, a third set consisting of a plurality of parallel warp yarns; any of including and the third set, the first between the first and second set, or said first and second sets one of which being positioned in the one side, supplying a spacer having a three-layer structure.
[Claim 2]
The method of claim 1 wherein the feed spacer, the number of warp yarns per unit of length (Strand per inch, SPI) are supplied to a spacer of a three-layer structure, characterized in that from 5 to 9.
[Claim 3]
The method of claim 1 wherein the feed spacer of the distance between the intersection point of the first and second sets, characterized in that the 3,800㎛ to 12,000㎛, 3-layer structure.
[Claim 4]
The method of claim 1 wherein the feed spacer of the first and second sets of the forming angle, characterized in that the 50 ° to 90 °, 3-layer structure.
[Claim 5]
The method of claim 1, wherein the warp yarns are supplied spacer having a three-layer structure, characterized in that the diameter of 167㎛ to 300㎛.
[Claim 6]
The method of claim 1 wherein the feed spacer, the spacer supply having a three-layer structure, characterized in that the 500㎛ to 900㎛ thickness.
[Claim 7]
Claim 1 to claim 6 wherein the reverse osmosis filter module including a feed spacer having a three-layer structure according to any of the preceding.
[Claim 8]
The method of claim 7, wherein the reverse osmosis filter module, tubes containing the permeate lazy receiving opening along the longitudinal direction; And extends outwardly from said tube at least one reverse osmosis membrane that is wound in the tube circumference; including, and the spacer is in contact with the one or more reverse osmosis membrane, characterized in that the take-up in the tube periphery, the reverse osmosis filter module, .
[Claim 9]
The method of claim 8, wherein the spacer, the first to be formed of a third set, the first and second set, and the one in contact with the above reverse osmosis membrane, and the third set is characterized in that the at least one reverse osmosis membrane and the non-contact , reverse osmosis filter module of.