WO2019117479A1 - Feed spacer and reverse osmosis filter module including same - Google Patents

Abstract

The present invention relates to a feed spacer and a reverse osmosis filter module including the same and, more specifically, to: a feed spacer having multiple functions since strands are formed in one feed spacer at different angles along the flow direction of raw water such that a differential pressure reduction region and a recovery increase region are separated; and a reverse osmosis filter module including the same.

Description

Feed Spacer and Reverse Osmosis Filter Module Including It

This specification is based on Korean Patent Application No. 10-2017-0170395 filed on Dec. 12, 2017, and Korean Patent Application No. 10-2018-0137968 filed on November 12, 2018 with the Korean Intellectual Property Office The contents of which are incorporated herein by reference in their entirety.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feed spacer and a reverse osmosis filter module including the feed spacer, and more particularly, to a feed- Recovery area is separated so as to provide multifunctional supply spacers and reverse osmosis filter modules comprising the same.

Worldwide, water shortage due to global warming is intensifying, and water purification technology, a technology to secure alternative water resources, is drawing attention.

Therefore, it is expected that the water treatment process using reverse osmosis membrane, which is the core technology of next generation water service utilizing alternative water resources such as seawater desalination and water reuse, will lead the water industry.

The reverse osmosis membrane permeated by this reverse osmosis membrane has been used in a variety of fields such as sterile water for medical use, purified water for population dialysis, or water for the production of semiconductors in the electronic industry, since it becomes pure water or nearly pure water.

Here, the two solutions having the difference in reverse osmosis concentration are separated into semi-permeable membranes, and after a certain time, the solution having a low concentration moves to the higher concentration side to generate a constant water level difference, which is called osmotic phenomenon. In addition, the difference in water level that occurs during this process is called reverse osmosis. By using this principle, a device for purifying water by passing only water molecules through a semipermeable membrane is called a reverse osmosis device, and the semipermeable membrane incorporated therein is a reverse osmosis filter module.

Such a reverse osmosis filter module comprises a center tube, a feed spacer, an RO membrane, a tricot filtration furnace, and the like.

Of these, the supply spacers serve as passages through which the raw water flows. The supply spacers are formed into a net shape. When the raw water flows into the feed spacer having a single shape, a differential pressure is generated due to a flow disturbance caused by the feed spacer, which results in an increase in energy cost.

Concentration polarization is inevitably generated near the reverse osmosis membrane by the water permeation flux. As the phenomenon becomes worse, the osmotic pressure increases near the reverse osmosis membrane and the water permeability decreases.

In this connection, there is a need for a supply spacer that can increase the efficiency of the reverse osmosis filter module by reducing the occurrence of differential pressure and alleviating the concentration polarization phenomenon using one supply spacer.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems, and an object of the present invention is to provide an apparatus and a method for manufacturing a semiconductor device, which are capable of forming a region having a different crossing angle in one supply spacer, To thereby provide a feed spacer structure in which a region for reducing the differential pressure and a region for increasing the recovery rate are simultaneously formed.

A feed spacer according to an embodiment of the present invention includes a first set in which a plurality of warp strands are positioned in parallel; And a second set in which a plurality of warp yarns intersect and are disposed in parallel with the first set, wherein the crossing angles of the first and second sets increase along the flow direction of the raw water.

In one embodiment, the intersecting angles of the first and second sets increase stepwise along the flow direction of the raw water.

In one embodiment, the feed spacer is characterized in that the diameter of the non-intersecting point is different from the intersection of the first and second sets.

In one embodiment, the feed spacer is characterized in that the difference in diameter of the intersection of the first and second sets and the non-intersection point along the flow direction of the raw water is reduced.

In one embodiment, the feed spacer is formed with a first end and a second end, wherein the first end is characterized by a smaller crossing angle of the first set and the second set than the second end.

In one embodiment, the distance between the intersections of the first and second sets is characterized in that the second end is shorter than the first end.

In one embodiment, the feed spacer is characterized in that the diameter difference of the first end along the flow direction of the raw water is larger than the diameter difference of the second end.

In one embodiment, the warp diameters of the intersections of the first and second sets are the same.

In one embodiment, the warp diameter of the first and second sets of non-intersecting points is characterized in that the warp of the first set is thinner than the warp of the second set.

The reverse osmosis filter module according to an embodiment of the present invention includes the supply spacer.

In one embodiment, the reverse osmosis filter module comprises: a tube including an opening for receiving permeate therethrough; And one or more reverse osmosis membranes extending outwardly from the tubes and wound around the tubes, wherein the spacers contact the one or more reverse osmosis membranes and are wound around the tubes.

According to the present invention, by forming a region having a different crossing angle in one supply spacer and by changing the ratio of diameters of the crossing region and the comparison region, the cross-sectional area of the flow path is increased to reduce the pressure difference, So that a plurality of effects are generated using one supply spacer.

1 is a top view of a supply spacer according to one embodiment of the present invention.

2 is a perspective view of a feed spacer according to one embodiment of the present invention.

Fig. 3 (a) is an enlarged view of the warp in Fig. 1, and Fig. 3 (b) is an enlarged view of the warp in Fig.

The present invention will now be described in detail with reference to the accompanying drawings. Hereinafter, a detailed description of known functions and configurations that may unnecessarily obscure the gist of the present invention will be omitted. The embodiments of the present invention are provided to fully explain the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

Hereinafter, preferred embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the following examples are provided only for the better understanding of the present invention, and the present invention is not limited by the examples.

<Supply Spacer >

FIG. 1 is a plan view of a supply spacer according to an embodiment of the present invention, FIG. 2 is a perspective view of a supply spacer according to an embodiment of the present invention, FIG. 3 (a) , And Fig. 3 (b) is an enlarged view of the warp in the portion B in Fig.

The feed spacer according to the present invention may be constituted of a first set and a second set in which a plurality of warp strands are positioned in parallel.

The first set may have one or more warps positioned in parallel, wherein the warp yarns may be positioned obliquely to the direction of the enemy. And, the second set can also be positioned more than one warp in parallel and positioned to intersect the first set. Also, the second set may be positioned opposite the first set and the tilting direction so that the first set and the second set 10, 20 may be provided in a lattice shape.

In addition, the first set 10 may be positioned at an angle of 10 ° to 80 ° from the flow direction of the raw water, and the second set 20 may be positioned at a slope of 100 ° to 170 ° from the flow direction of the raw water. For example, when the warp constituting the first set 10 is inclined at 30 from the flow direction of the raw water, the warp of the second set 20 can be positioned at an angle of 120 from the flow direction of the raw water.

At this time, when the angle formed between the first set 10 and the flow direction of the raw water is less than 10, the sectional area of the flow path formed by the warp decreases and the laminar flow velocity gradient does not occur in the central portion of the supply spacer, If the angle is more than 80, the cross-sectional area of the flow passage may be reduced and the flow of the raw water may actively occur in the up and down direction, thereby increasing the pressure loss. Here, the flow path may be formed by a warp constituting each set, and may mean an empty space between the reverse osmosis membrane and each set, which are located at the upper and lower portions of the supply spacers.

The supply spacers according to the present invention may have different angles at which the first and second sets 10 and 20 intersect along the flow direction of the raw water. More specifically, the area A for reducing the differential pressure and the area B for increasing the recovery may be separated according to the angle between the first and second sets. It should be noted that the area for reducing the differential pressure and the area for increasing the recovery rate are not limited as long as they can perform their functions.

Further, the area A for reducing the differential pressure can be located at the first contact with the raw water, and the area B for increasing the recovery rate along the flow direction of the raw water can be located. In other words, the crossing angles of the first and second sets 10, 20 along the flow direction of the raw water can increase along the flow direction of the raw water, and the angle increase can be made stepwise. Therefore, the supply space according to the present invention can be formed in two stages, and the region (A, first stage) in which the differential pressure is reduced can be formed in a region B (where the first and second set intersection angles a ₁ ) It may be smaller than the intersection angle (a ₂₎ of the second stage). That is, the area to reduce the pressure difference (A, first stage) is the distance between the intersection of the first and the distance between the intersection points which the second set is crossed formation area (B, the second stage) to (d ₁₎ to increase the recovery rate (d ₂ ). That is, the region where the differential pressure is decreased based on the same area can be formed such that the density of the intersection is low and the density of the intersection is high in the region where the recovery rate is increased.

The feed spacers according to the present invention can be provided with different diameter ratios of the warp yarns constituting the first and second sets depending on the region and the diameter of the intersection of the first and second sets 10 and 20 and the non- Can be provided differently. Referring to FIG. 2, the warp yarns forming the first and second sets 10, 20 can be formed asymmetrically in thickness, because the protruding portions are formed in the middle of the warp yarns to increase the diameter of the warp yarns , It can mean that the diameter of the protruded portion and the protruded portion can be formed asymmetrically.

 In one embodiment, the diameter ratio of the warp yarns forming the area A for decreasing the differential pressure may be greater than the diameter ratio of the warp yarns forming the area B for increasing the recovery. 3, the difference between the protruding portion diameter W2 and the non-protruding portion diameter W1 of the warp yarns forming the region A for decreasing the differential pressure is the ratio of the protruding portion diameter W2 of the warp portion May be formed larger than the difference between the diameter W2 and the non-protruding portion diameter W1 '. That is, the diameter difference between the intersection point and the non-intersecting point warp along the raw water flow direction can be reduced.

It is noted that the supply spacers according to the present invention have the same thickness regardless of the region. That is, the first and second sets 10 and 20 can intersect the protrusions to form the supply spacers. The diameter W2 of the protrusions can be formed to be the same in both the area for reducing the differential pressure and the area for increasing the collection ratio have. More specifically, the first and second sets 10 and 20 according to the present invention comprise a protruding portion of the warp forming the first set 10 and a protruding portion of the warp forming the second set 20 By intersecting, the thickness of the supply spacers can be determined. Therefore, the difference in the diameter ratio of the warp yarns forming each region can be controlled by the non-protruding portions W1 and W1 '.

The feed spacer according to the present invention has an angle a ₁ between the first and second sets 10, 20, a ₂ ) By adjusting the diameter and the ratio of the diameter of the warp, it is possible to generate a plurality of functions and effects by using one supply spacer.

More specifically, the area (A) to reduce the differential pressure is the diameter difference between the first and the projecting portion reduces through the angle (a ₁₎ 2 sets (10, 20) (W2) and the non-protruding portion (W1) The flow path of the supply spacers can be increased. Accordingly, when the raw water is introduced through the supply spacers, the supply spacers do not interfere with the flow of the raw water due to the wide flow path, so that the differential pressure may be reduced. By reducing the generation of differential pressure, it is possible to provide a supply spacer that can alleviate concentration polarization of the supply spacers and increase the efficiency of the reverse osmosis filter module.

And, by the area (B) to increase the recovery rate is reduced to the diameter difference between the first and the increase between the angle (a ₂₎ 2 sets (10, 20) and projecting portions (W2) and the non-protruding portion (W1 ') , The flow path of the supply spacer can be reduced to increase the permeation amount. That is, when raw water is supplied to the supply spacers with the same pressure, the pressure increases when the flow path of the supply spacers is reduced. Therefore, the effect of increasing the recovery rate depending on the increased pressure may occur.

At this time, the non-protruding portion W1 of the area A for reducing the differential pressure and the non-protruding portion W1 'of the area B for increasing the recovery rate may have different diameters. That is, the adjustment of the diameter ratio of the area A in which the differential pressure is reduced and the area B in which the recovery rate is increased can be adjusted by the non-protruding parts W1 and W1 '.

Therefore, the height of the supply spacer according to the present invention is characterized in that the area A in which the differential pressure is reduced is equal to the area B in which the recovery rate is increased.

<Reverse Osmosis Filter Module>

The reverse osmosis filter module is a component of a membrane separation device that performs the function of purifying water that is actually supplied using the reverse osmosis principle. The reverse osmosis filter module may include a reverse osmosis membrane, a supply spacer, a tube containing tricot filtrate water and an opening to receive permeate along its length. Further, a pair of telescoping prevention devices may be further included, but a detailed description thereof will be omitted.

One or more reverse osmosis membranes use osmotic phenomenon to filter foreign substances contained in water and to perform a role of a flow path so that purified water flows effectively. These one or more reverse osmosis membranes extend outwardly from the tube and are wound around the tube.

The supply spacers may be provided with the supply spacers according to the present invention described above. More specifically, the feed spacers may be comprised of a first and a second set in which a plurality of warp yarns are positioned in parallel, and may be separated into one or more regions due to differences in angle and diameter ratio between the first and second sets have. Since the supply spacers according to the present invention are the same as the supply spacers described above, a detailed description thereof will be omitted.

The supply spacers form a passage through which the raw water flows from the outside, and serve to maintain a gap between one reverse osmosis membrane and another reverse osmosis membrane. To this end, the feed spacer is configured to contact upstream and downstream with one or more reverse osmosis membranes and to be wound around the tube, such as one or more reverse osmosis membranes.

Here, the material of the supply spacers is not particularly limited, but is preferably composed of any one of polyethylene, polyvinyl chloride, polyester, and polypropylene.

The tricot filtration water generally has a fabric-like structure and acts as a channel for making purified water flow through the reverse osmosis membrane 10.

At this time, the tricot filtration water generally has a fabric-like structure and acts as a channel for making purified water flow through the reverse osmosis membrane (10).

The tube is located at the center of the water treatment reverse osmosis filter module and serves as a passage through which the filtered water flows.

To this end, it is preferable that a space (or an opening) of a predetermined size is formed on the outside of the tube so that the filtered water flows in. At this time, it is preferable that the pores are formed more than one so that the filtered water can be introduced more efficiently.

<Comparative Example>

Conventional feed spacers were made in the form of a single mesh having the same first and second set angles, the distance of the warp yarns (the distance between the cross points) and the difference in diameter of the warp yarns.

<Examples>

An embodiment is a feed spacer according to the present invention, which has two different forms in which the set angle, the distance of the warp (the distance between the intersections) and the difference in the diameter of the warp are different.

First stage Second stage Pa / 탆 0.0144 0.0205

Comparative Example Example Pa / 탆 0.123 0.105

Table 1 shows the differential pressure (Pa / 占 퐉) with respect to the unit length of each of the first and second stages of the embodiment, and Table 2 shows the differential pressures (Pa / 占 퐉) with respect to the unit lengths of each of the comparative example and the example will be.

First, it can be seen that the differential pressure (Pa / 占 퐉) is reduced by 70% in the region (A, first stage) where the differential pressure is decreased in the embodiment (B, second stage) where the recovery rate is increased. It can be seen that the differential pressure per unit length of the comparative example is 0.123 Pa / 占 퐉, and the differential pressure per unit length of the embodiment is 0.105 Pa / 占 퐉, which is 85% lower than that of the comparative example.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

Claims (11)

A first set in which a plurality of warp strands are positioned in parallel; And And a second set in which a plurality of warp yarns intersect and are positioned in parallel with the first set, The intersecting angles of the first and second sets, And increases along the flow direction of the raw water. Supply Spacer. The method according to claim 1, The intersecting angles of the first and second sets, And gradually increases along the flow direction of the raw water. The method according to claim 1, The supply spacers Characterized in that the diameters of the intersection points of the first and second sets are different from the diameters of the non-intersection points. 3. The method of claim 2, The supply spacers Wherein a difference in diameter of the intersection of the first and second sets and the non-intersection point along the flow direction of the raw water is reduced. The method according to claim 1, The supply spacers The first end being formed at a first end and the second end, wherein the first end has a smaller crossing angle than the second end of the first set and the second set. 6. The method of claim 5, The distance between the intersection points of the first and second sets may be, And the second end is shorter than the first end. 6. The method of claim 5, The supply spacers Wherein the difference in diameter of the first end along the flow direction of the raw water is greater than the difference in diameter of the second end. The method according to claim 1, Wherein the warp diameters of the intersections of the first and second sets are the same. The method according to claim 1, The warp diameter of the first and second sets of non- Wherein said first set of warp yarns is thinner than said second set of warp yarns. A device according to any one of the preceding claims, comprising a supply spacer according to any one of claims 1 to 9, Reverse Osmosis Filter Module. 11. The method of claim 10, Wherein the reverse osmosis filter module comprises: A tube including an opening for receiving a permeate liquid along a longitudinal direction; And And one or more reverse osmosis membranes extending outwardly from the tubes and wound around the tubes, The spacer Wherein the at least one reverse osmosis membrane is in contact with the at least one reverse osmosis membrane and is wound around the tube.

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