KR102129667B1 - Filter assembly containing mesh sheet for internal spacer for water treatment and filter module containing the same - Google Patents

Abstract

The present invention relates to a filter assembly for water treatment comprising a mesh sheet for a spacer and a filter module for water treatment comprising the same, and more specifically, filtration by back pressure with a three-dimensional fluid flow through a mesh sheet for a water treatment filter assembly spacer The present invention relates to a filter assembly for water treatment and a filter module for water treatment including the same.

Description

Filter assembly containing mesh sheet for internal spacer for water treatment and filter module containing the same}

The present invention relates to a filter assembly for water treatment comprising a mesh sheet for a spacer and a filter module for water treatment comprising the same, and more specifically, filtration by back pressure with a three-dimensional fluid flow through a mesh sheet for a water treatment filter assembly spacer The present invention relates to a filter assembly for water treatment and a filter module for water treatment including the same.

The filter module for water treatment is manufactured by laminating in a roll form a first separation membrane, a filtered water flow path portion, a second separation membrane, and an inflow flow path portion sequentially stacked on a central pipe located in the center. Among them, the filtered water channel portion serves as a path through which the filtered water, which is transmitted through the separation membrane, can flow well to the filtered water central pipe, and a tricoat is conventionally used. However, the conventional tricoat has a problem in that a straight flow channel is formed, and thus, when the filtered water is moved, a loss of the filtered water due to back pressure occurs. In addition, since the tricoat used in the conventional filter module for water treatment has a high cost, it is necessary to reduce the material cost in order to commercialize the filter module for water treatment.

Republic of Korea Registered Patent No. 10-0464782

The present invention has been devised in view of the above points, and an object of the present invention is to provide a filter assembly for water treatment including a mesh sheet capable of minimizing loss of filtered water due to back pressure with a three-dimensional fluid flow.

In addition, another object of the present invention is to provide a filter module for water treatment having an excellent amount of filtered water and a salt rejection rate, which includes the filter assembly for water treatment according to the present invention.

In order to solve the above-described problems, the present invention is a first separation membrane, a second separation membrane and a plurality of first yarns interposed between the first separation membrane and the second separation membrane, and arranged to be parallel at predetermined intervals in the first direction and A mesh sheet including a plurality of second yarns arranged to be parallel to each other at a predetermined distance in a second direction so as to intersect each other at a predetermined angle with the first yarn, and wherein the intersection of the first yarn and the second yarn is bonded to the mesh sheet. Provided is a filter assembly for water treatment including an inner spacer.

According to an embodiment of the present invention, the thickness of the mesh sheet may be 0.2 to 0.6mm.

In addition, according to a preferred embodiment of the present invention, the thickness of the mesh sheet may be 0.25 ~ 0.4mm.

In addition, according to an embodiment of the present invention, the first yarn and the second yarn may be arranged to be parallel at intervals of 0.2 to 1.0 mm.

In addition, according to a preferred embodiment of the present invention, the first yarn and the second yarn may be arranged to be parallel at intervals of 0.2 to 0.5 mm.

In addition, according to an embodiment of the present invention, the second yarn may cross each other at an angle of 20 to 70° with the first yarn.

In addition, according to a preferred embodiment of the present invention, the second yarn may cross each other at an angle of 20-50° with the first yarn.

In addition, according to an embodiment of the present invention, the first yarn and the second yarn may be made of any one or a copolymer selected from polyethylene, polypropylene, polyester, and nylon.

In addition, according to an embodiment of the present invention, the filter assembly for water treatment may be processed such that the remaining edges except for one edge from which the filtered water is discharged among the four edges of the side portion are separated between the outside and the inside of the filter assembly for water treatment. have.

In addition, the present invention provides a filter module for water treatment including the filter assembly for water treatment according to the present invention.

According to an embodiment of the present invention, the filter module for water treatment may be any one selected from a microfiltration membrane module, an ultrafiltration membrane module, a nano separation membrane module, and a reverse osmosis membrane module.

According to the present invention, through the mesh sheet for the filter assembly spacer for water treatment that enables a three-dimensional fluid flow, it is possible to minimize the loss of filtration water due to the back pressure of the filter assembly for water treatment, thereby providing excellent filtration water volume and material cost. The filter assembly for water treatment of the present invention can be widely used in a filter module for water treatment, such as a microfiltration membrane module, an ultrafiltration membrane module, a nano separation membrane module, and a reverse osmosis membrane module.

1 is a schematic diagram of a filter assembly for water treatment according to an embodiment of the present invention.
2 is a schematic diagram of a mesh sheet for a spacer inside a filter assembly for water treatment according to an embodiment of the present invention.
3 is a perspective view of a filter assembly for water treatment according to an embodiment of the present invention.
4 is an exploded perspective view of a filter module for water treatment according to an embodiment of the present invention.

A spacer used in a conventional water treatment filter usually uses a tricoat, and the tricoat forms a straight flow channel, which causes back pressure in the flow channel to cause loss of filtered water. There was.

In order to solve the above-mentioned problem, the filter assembly for water treatment according to the present invention uses a mesh sheet that enables three-dimensional fluid flow to minimize loss of filtration water due to back pressure in the channel.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains can easily practice. The present invention can be implemented in many different forms and is not limited to the embodiments described herein.

The filter assembly for water treatment according to the present invention will be described.

The filter assembly for water treatment of the present invention includes a first separation membrane, a second separation membrane, and a plurality of first yarns interposed between the first separation membrane and the second separation membrane, and arranged to be parallel at predetermined intervals in the first direction. It includes a plurality of second yarns arranged to be parallel to each other at a predetermined distance in a second direction so as to intersect each other at a predetermined angle, and includes a mesh sheet in which the intersection between the first yarn and the second yarn is bonded. Includes internal spacers.

The first separation membrane and the second separation membrane may vary depending on the size of particles that can be filtered for each purpose of the filter assembly for water treatment. As an example of this, the first separation membrane and the second separation membrane are microfiltration membranes, reverse osmosis membranes, ultrafiltration membranes, or It may be a nano-separation membrane.

The specific structure, material, pore size, porosity, thickness, etc. of the microfiltration membrane, ultrafiltration membrane, nano-separation membrane, and reverse osmosis membrane may be known, and the present invention is not particularly limited thereto. Hereinafter, the case where the first separation membrane and the second separation membrane are reverse osmosis membranes will be described.

When the first separation membrane and the second separation membrane are reverse osmosis membranes, the first separation membrane and the second separation membrane may be separation membranes in which an active layer, a polymer support layer, and a porous support layer are sequentially stacked.

The porous support is not particularly limited as long as it usually serves as a support for the reverse osmosis membrane, but may preferably be a fabric. Specifically, the fabric refers to a fabric, a knitted fabric, or a non-woven fabric, and the fabric has a directionality as it is woven with warp and weft yarns, and a knitted fabric may have a specific directionality depending on the knitting method, but in a broad sense, it may be in either direction. Can have a directionality of In addition, the nonwoven fabric has no vertical and horizontal directionality, unlike the fabric or knitted fabric.

When the fabric is a fabric, physical properties such as porosity, pore size, strength, and permeability of a desired porous support can be controlled by adjusting the type of fibers, fineness, density of the warp yarns, and tissues of the fabrics.

In addition, when the fabric is knitted, it is possible to control the properties of porosity, pore size, strength, permeability, etc. of the desired porous support by controlling the type, fineness, tissue, gauge, cut, etc. of fibers included in the knitted fabric. .

In addition, when the fabric is a nonwoven fabric, the type, fineness, fiber length, basis weight, density, etc. of fibers included in the nonwoven fabric can be adjusted to control physical properties such as porosity, pore size, strength, and permeability of the desired porous support. .

The material of the porous support can usually serve as a porous support of the reverse osmosis membrane, and can be used without limitation as long as it is used for the porous support of the normal reverse osmosis membrane. As a non-limiting example of this, synthetic fibers selected from the group consisting of polyester, polypropylene, nylon, and polyethylene or natural fibers including cellulose may be used.

The physical properties of the membrane can be controlled according to the porosity and hydrophilicity of the porous support. In addition, the porous support may have an air permeability of 2 cc/cm ² ㆍsec or more, preferably an air permeability of 2 to 20 cc/cm ² ㆍsec, and an average pore size of the porous support is 1 It may be from 600 to 600㎛, preferably 5 to 300㎛. When the air permeability and the pore size of the average pore are satisfied, smooth inflow of water and water permeability can be improved.

In addition, the thickness of the porous support may be 20 ~ 150㎛, if less than 20㎛, the strength of the entire film may be lowered, if it exceeds 150㎛, it may cause the flow rate decreases.

The polymer support layer is not limited as long as it is a material used as a polymer support layer in the art, but is preferably a polysulfone-based polymer compound, a polyamide-based polymer compound, a polyimide-based polymer compound, a polyester-based polymer compound, an olefin-based polymer compound, At least one selected from polyvinylidene fluoride and polyacrylonitrile, and more preferably a polysulfone-based polymer compound.

The thickness of the polymer support layer may be 30 to 250 μm, and if it is less than 30 μm, durability of the reverse osmosis membrane may be reduced, and when it exceeds 250 μm, the flow rate of the reverse osmosis membrane may be reduced.

The hydrophilic selective layer can be used without limitation as long as it can be used as a hydrophilic selective layer of a reverse osmosis membrane in the art, but preferably, a polyamide-based polymer compound, a polypiperazine-based polymer compound, a polyphenylene diamine-based polymer compound , It may include at least one selected from polychlorophenylene diamine-based polymer compound and polybenzidine-based polymer compound, more preferably a polyamide-based polymer compound.

The method of forming the hydrophilic selective layer may be different depending on the type of material included in the selected hydrophilic selective layer, but the method may be based on a conventional method of forming a hydrophilic selective layer according to the type of material. As an example, a method of forming a hydrophilic selective layer made of a polyamide-based polymer compound among materials that can be included in the hydrophilic selective layer will be described below.

In order to form a hydrophilic selective layer made of a polyamide-based polymer compound on a polymer support layer, a membrane formed with a polymer support layer on a porous support is immersed in an aqueous solution containing a polyfunctional amine, and then contacted with an organic solution containing a polyfunctional acid halide compound. To form a hydrophilic selection layer.

Specifically, the polyfunctional amine is a material having 2 to 3 amine functional groups per monomer and may be a primary amine or a polyamine containing a secondary amine. At this time, as the polyamine, aromatic primary diamine is used as metaphenylenediamine, paraphenylenediamine, orthophenyldiamine, and substituents, and cycloaliphatic primary diamine such as aliphatic primary diamine and cyclohexenediamine is another example. , Cycloaliphatic secondary amines such as piperazine, aromatic secondary amines, and the like. More preferably, metaphenylenediamine is used among the multifunctional amines, and the concentration is preferably an aqueous solution containing metaphenylenediamine in an amount of 0.5 to 10% by weight, more preferably metaphenylenediamine 1 To 4% by weight, more preferably 1.5 to 2.5% by weight may be included, through which there is an advantage that can express an improved permeate flow rate.

When forming the hydrophilic selective layer, the polyfunctional amine-containing aqueous solution may be immersed on the polymer support layer for 0.1 to 10 minutes, more preferably 0.5 to 1 minute.

In addition, a substance that reacts with the polyfunctional amine used in forming the hydrophilic selective layer is a polyfunctional acid halide compound, preferably a polyfunctional acyl halide, more preferably trimethoyl chloride, isophthaloyl chloride, 5-methoxy At least one selected from -1,3-isophthaloyl chloride and terephthaloyl chloride can be used. The polyfunctional acyl halide may be dissolved in an aliphatic hydrocarbon solvent at 0.01 to 2% by weight, wherein the aliphatic hydrocarbon solvent is a mixture of n-alkanes having 5 to 12 carbon atoms and structural isomers of saturated or unsaturated hydrocarbons having 8 carbon atoms, or Cyclic hydrocarbons having 5 to 7 carbon atoms can be used. Preferably, the polyfunctional acyl halide-containing solution may be dissolved in an aliphatic hydrocarbon solvent at 0.01 to 2% by weight, more preferably 0.05 to 0.3% by weight of the polyfunctional acyl halide. At this time, the polyfunctional acid-halogen compound may be immersed in a membrane treated with a polyfunctional ami-containing aqueous solution for 0.1 to 10 minutes, more preferably 0.5 to 1 minute.

The thickness of the hydrophilic selective layer may be 0.1 to 1 μm, and if the thickness is less than 0.1 μm, the salt removal ability may be reduced, and if it exceeds 1 μm, the permeate flow rate of the reverse osmosis membrane may be reduced.

The mesh sheet will be described with reference to FIG. 2. The mesh sheet 110 is characterized in that a plurality of first yarns 111 and a plurality of second yarns 112, which are arranged to be parallel at predetermined intervals, cross each other at a predetermined angle θ, and Unlike the conventional tricoat forming the fluid flow of the bed, it is possible to form a three-dimensional fluid flow.

The three-dimensional fluid flow includes a fluid flow (A) in a straight line and a fluid flow (B) bypassing the three-dimensional space present in the mesh sheet when the straight fluid flow (A) is obstructed by back pressure. can do. Through this three-dimensional fluid flow, it is possible to minimize the decrease in the amount of filtered water due to back pressure.

The first yarn and the second yarn may be made of any one or a copolymer thereof selected from polyethylene, polypropylene, polyethylene terephthalate, polyester, and nylon. The manufacturing cost can be lowered.

The thickness of the mesh sheet may be 0.2 to 0.6 mm, more preferably 0.25 to 0.4 mm, and when the thickness of the mesh sheet is less than 0.2 mm, three-dimensional fluid flow may be disturbed and a decrease in the amount of filtered water may be reduced. When it exceeds 0.6mm, damage to the first separation membrane and the second separation membrane may occur and the salt removal rate may be lowered. In addition, when the thickness of the mesh sheet is 0.25 ~ 0.4mm, the filtered water amount and salt removal rate may be more excellent.

The diameter of the first yarn and the second yarn included in the mesh sheet may be 0.1 to 0.3 mm, more preferably 0.125 to 0.2 mm, and when the diameter of the first yarn and the second yarn is less than 0.1 mm, 3 The dimensional fluid flow may be disturbed and the decrease in the amount of filtered water may be reduced, and if it exceeds 0.3 mm, damage to the first and second separators may occur, and the salt removal rate may be reduced. In addition, when the diameters of the first and second yarns are 0.125 to 0.2 mm, the filtered water amount and the salt removal rate may be more excellent.

The first yarn and the second yarn included in the mesh sheet may be arranged to be parallel at intervals of 0.2 to 1.0 mm, more preferably 0.2 to 0.5 mm, and if the first yarn and the second yarn are arranged, If it is less than 0.2mm, the three-dimensional fluid flow may be disturbed and the decrease in the amount of filtered water may be lowered. If it exceeds 1.0mm, the first membrane and the second membrane are compressed by pressure to reduce the amount of filtered water and the salt removal rate. It may be difficult to achieve the object of the present invention, such as lowering. In addition, when the batch spacing is 0.2 to 0.5 mm, a smooth three-dimensional fluid flow can be realized, and accordingly, the amount of filtered water and the salt removal rate can be further improved.

The first yarn and the second yarn may cross each other at an angle θ of 20 to 70°, more preferably 20 to 50°, and if the angle θ is less than 20°, module manufacturing may be difficult. There may be problems such as deterioration in salt removal rate due to defects, and when it exceeds 70°, the three-dimensional fluid flow may be disturbed by the first and second yarns and the amount of filtered water may be reduced. . In addition, when the angle (θ) is 20 to 50°, it is possible to implement an easy and smooth three-dimensional fluid flow for normal module production, and accordingly, the amount of filtered water may be further improved.

The shape of the filter assembly for water treatment of the present invention will be described.

3 is a perspective view of a filter assembly for water treatment according to an embodiment of the present invention, the first separation membrane 12, the second separation membrane 13 and the mesh sheet 11 interposed between the first separation membrane and the second separation membrane The filter assembly 10 for water treatment includes the filter assembly for water treatment except for one edge from which the filtered water is discharged among the four edges of the side portion in order to prevent external inflow water from flowing into the filter assembly for water treatment. It can be treated to separate between the outside and inside of.

The treatment method for separating the outside and the inside of the filter assembly for water treatment is a method of bonding the remaining edges except for one edge from which the filtered water is discharged among the four edges of the side surface of the filter assembly for water treatment, or of the present invention. The first separation membrane or the second separation membrane is folded in a sandwich manner so as to sandwich the inner spacer mesh sheet in the center of the separation membrane to form a filter assembly for water treatment, and filtered water is discharged among the three unbonded edges of the side surface of the filter assembly for water treatment. A method of bonding the edges except one edge with an adhesive may be used.

The edge side portion of the bonding may be used without limitation adhesives known in the art, for example, it may be any one selected from urethane-based adhesives, epoxy-based adhesives and acetate-based adhesives.

Meanwhile, the mesh sheet included as the inner spacer of the filter assembly for water treatment of the present invention can also be used as a mesh sheet for the outer spacer of the filter assembly.

The mesh sheet for spacers inside the filter assembly for water treatment of the present invention will be described. Since the configuration of the mesh sheet is the same as that of the mesh sheet included in the above-described filter assembly for water treatment, a detailed description thereof will be omitted.

When the mesh sheet according to the present invention is used as the inner and outer spacers used in the filter module for water treatment, it is possible to smoothly flow the fluid of the filtered water and the influent water, and also to obtain a material cost reduction effect through unifying the original member.

Next, a filter module for water treatment including the filter assembly for water treatment according to the present invention will be described.

The filter module for water treatment may be any one selected from a microfiltration membrane module, an ultrafiltration membrane module, a nano-membrane module, and a reverse osmosis membrane module, and may have different configurations depending on the water treatment field. The filter module for water treatment may employ a configuration commonly used in the field of water treatment in the industry. However, as one example, the reverse osmosis membrane module of the filter module for water treatment will be described below.

4 is an exploded perspective view of a reverse osmosis membrane module according to an embodiment of the present invention.

4, as a reverse osmosis membrane module including a plurality of filter assemblies for water treatment of the present invention wound in a spiral wound, a plurality of filter aggregates are wound in a spiral wound around the outlet pipe to be provided inside the pressure case. have.

The filter assembly is wound in a spiral wound around the outlet pipe, and thus wound in a spiral wound to further increase the surface area of the membrane of the filter assembly included per unit volume of the pressure case, and accordingly, the effective area of the membrane can be increased.

The size and shape of the pressure case may not be limited within the range in which the reverse osmosis membrane module can be accommodated, but preferably, the shape may be a cylinder because a plurality of filter assemblies are wound in a spiral shape. However, the shape of the pressure case is not limited to this. The material of the pressure case may be used without limitation in the case of a pressure case material commonly used in reverse osmosis membrane modules in the art.

As described above, the reverse osmosis membrane module includes a plurality of filter assemblies wound around the outlet tube in a spiral shape, and the cross-sectional diameter of the reverse osmosis membrane module depends on the diameter of the outlet tube, the number of osmosis membrane assemblies, and the thickness. It may vary.

The outlet pipe 150 is formed with a plurality of holes, and the fluid flowing through the outlet pipe 150 flows into the separation membranes 120 and 130 of the filter assembly through the hole. Specifically, the C solutions of the two solutions C and D having different concentrations flow inside the pressure case and outside the separation membranes 120 and 130 of the filter assembly, and the D solution separates the filter assembly through the hole in the outlet pipe 150 ( 120, 130) will flow into the interior. Through this, two solutions (C, D) having different concentrations are located inside and outside the separation membranes 120 and 130 of the filter assembly, whereby osmotic pressure is generated and acts. However, the two solutions of C and D may be injected in the same direction as shown in FIG. 4, but this is an example, differently, the C and D solutions may be injected in different directions according to purposes.

The reverse osmosis membrane module may include an external spacer 140 between a plurality of filter assemblies. The outer spacer 140 is an inflow channel, and can form a channel through which fluid flowing between different filter assemblies, for example, a C solution, can flow smoothly.

Meanwhile, the precision filtration membrane module, the ultrafiltration membrane module, and the nano-separation membrane module including the filter assembly for water treatment according to the present invention may be configured by different materials of the separation membrane included in the filter assembly used for each module. Since the material can adopt the configuration of a microfiltration membrane, an ultrafiltration membrane, and a nano-separation membrane, which are commonly used in the art, detailed description is omitted.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments presented herein, and those skilled in the art to understand the spirit of the present invention can add elements within the scope of the same spirit. However, other embodiments may be easily proposed by changing, deleting, adding, or the like, but this will also be considered to be within the scope of the present invention.

(Example 1)

A separation membrane (horizontal length: 260 mm, vertical length: 2000 mm, thickness: 120 µm) comprising a PET nonwoven fabric, a polysulfone formed on the PET nonwoven fabric, and a polyamide hydrophilic layer formed on the porous support was first membrane and It was used as a separation membrane.

As the inner spacer, the polypropylene mesh sheet of the same size as the separator (thickness: 0.12 mm, spacing of the first and second yarns: 0.3 mm, crossing angle of the first yarn and the second yarn: 60°) was applied to the first. It was interposed between the separator and the second separator. At this time, the first separator and the second separator were stacked so that the hydrophilic select layers faced outward, and three edges of the stacked membrane were joined to prepare a filter assembly.

After laminating an outer spacer having the same material and specifications as the inner spacer on the manufactured filter assembly, winding the roll into the outlet tube starting with the unbonded surface of the filter assembly, and both ends and outlet tubes of the unbonded surface. Was bonded to prepare a filter module for water treatment.

(Examples 2 to 18)

At least one of the thickness of the mesh sheet, the distance between the first and second yarns, and the crossing angle of the first and second yarns, performed in the same manner as in Example 1, as shown in Table 1 below. A filter module for water treatment was produced by changing any one.

(Comparative Example 1)

The same procedure as in Example 1 was carried out, but instead of a mesh sheet, a tricot made of polyethylene terephthalate having a thickness of 0.25 mm was used as an internal spacer to produce a filter module for water treatment.

(Experimental Example 1)

The flow rates and salt removal rates of the filter modules for water treatment prepared in Examples 1 to 18 and Comparative Example 1 were measured.

Specifically, the NaCl aqueous solution (temperature 25°C, pressure 60 psi) at a concentration of 200 ppm was used as the influent water, and the flow rate and salt removal rate were measured by receiving the filtered water after passing through the filter for 30 minutes under a 1:1 ratio of filtered water and concentrated water. It is shown in Table 1 below.

division Inner spacer Filter module for water treatment Material Thickness(mm) Spacing of first and second yarns (mm) Crossing angle of first and second yarns (°) Flow rate (GPD) Salt removal rate
(%) Comparative Example 1 Tricot 0.25 0.4 - 80.9 96.7 Example 1 Mesh sheet 0.12 0.3 60 85.2 96.8 Example 2 Mesh sheet 0.22 0.3 60 91.2 96.8 Example 3 Mesh sheet 0.27 0.3 60 96.2 96.8 Example 4 Mesh sheet 0.33 0.3 10 98.5 95.1 Example 5 Mesh sheet 0.33 0.3 25 105.1 96.7 Example 6 Mesh sheet 0.33 0.3 45 104.9 96.7 Example 7 Mesh sheet 0.33 0.3 60 99.9 96.9 Example 8 Mesh sheet 0.33 0.3 85 96.9 96.8 Example 9 Mesh sheet 0.38 0.3 60 102.1 96.7 Example 10 Mesh sheet 0.44 0.3 60 105.2 96.1 Example 11 Mesh sheet 0.57 0.3 60 108.2 95.2 Example 12 Mesh sheet 0.66 0.3 60 110.2 94.5 Example 13 Mesh sheet 0.33 0.1 60 80.2 96.8 Example 14 Mesh sheet 0.33 0.4 60 102.2 96.6 Example 15 Mesh sheet 0.33 0.65 60 99.5 95.8 Example 16 Mesh sheet 0.33 0.9 60 95.2 94.9 Example 17 Mesh sheet 0.33 1.3 60 90.2 94.1 Example 18 Mesh sheet 0.33 6 60 88.2 95.7

As shown in Table 1, it can be seen that a module having a tricoat as an inner spacer (Comparative Example 1) has a lower flow rate than a module having a mesh sheet as an inner spacer (Example 1).

In addition, it can be seen that the flow rate of the module (Example 2) with a mesh sheet having a thickness of 0.22 mm is significantly superior to that of the module (Example 1) with a mesh sheet having a thickness of 0.12 mm. It can be seen that the flow rate of the module having the thickness of the mesh sheet (Example 3) is more excellent. On the other hand, it can be seen that the module (Example 12) with a mesh sheet having a thickness of 0.66 mm has excellent filtration water, but the salt removal rate is lowered to less than 95%.

On the other hand, it can be seen that the flow rate and salt removal rate of Example 5 having a crossing angle of 25° is better than that of a module (Example 4) having a mesh sheet having a crossing angle of 10° between the first yarn and the second yarn. In addition, Example 7 in which the cross angle is 60° can be confirmed that the flow rate is significantly lower than in Example 6 in which the cross angle is 45°, and in Example 8 in which the cross angle is 85°, the cross angle is 60°. It can be seen that the flow rate is lowered even more than in Example 7.

On the other hand, it can be seen that the permeation flow rate of Example 7 having a spacing of 0.3 mm is significantly superior to that of the module (Example 13) having a mesh sheet having a spacing of 0.1 mm between the first yarn and the second yarn.

It can be seen that the flow rate of Example 16 with the spacing of 0.9 mm is significantly higher than that of Example 17 with the spacing of 1.3 mm, and Example 15 with the spacing of 0.65 mm is superior to the flow rate as well as the salt removal rate. It can be seen that Example 14 with a spacing of 0.4 mm is more excellent in flow rate and salt removal rate.

10: filter assembly for water treatment
11: mesh sheet
12: first separator
13: second separator
14: outer spacer
15: outlet pipe
100: filter module for water treatment
110: mesh sheet
111: 1st yarn
112: second yarn
120: first separation membrane
130: second separator
140: outer spacer

Claims (11)

A first separator;
A second separator; And
Interposed between the first separation membrane and the second separation membrane, a plurality of first yarns arranged in parallel with a predetermined interval in the first direction and a predetermined direction in the second direction to cross each other at a predetermined angle with the first yarn It includes; a plurality of second yarns arranged to be parallel to each other at intervals, and an inner spacer including a mesh sheet in which an intersection point between the first yarn and the second yarn is bonded.
The first yarn and the second yarn are made of any one or a copolymer selected from polyethylene, polypropylene, polyester and nylon,
The thickness of the mesh sheet is 0.2 ~ 0.6mm, the first yarn and the second yarn are arranged to be parallel with a spacing of 0.2 ~ 0.65mm, the second yarn is an angle of 20 ~ 70 ° with the first yarn Filter aggregate for water treatment, characterized in that crossing each other.
delete According to claim 1,
The thickness of the mesh sheet is a filter assembly for water treatment of 0.25 ~ 0.4mm.
delete According to claim 1,
The first yarn and the second yarn are filter aggregates for water treatment, which are arranged to be parallel at intervals of 0.2 to 0.5 mm.
delete According to claim 1,
The second yarn is a filter assembly for water treatment that crosses each other at an angle of 20-50° with the first yarn.
delete According to claim 1,
The filter assembly for water treatment is a filter assembly for water treatment in which the remaining edges of the four edges of the side portion except for one edge from which the filtered water is discharged are separated between the outside and the inside of the filter assembly for water treatment.
A filter module for water treatment, comprising the filter assembly for water treatment according to claim 1.
The method of claim 10,
The filter module for water treatment is any one selected from a microfiltration membrane module, an ultrafiltration membrane module, a nano-membrane module, and a reverse osmosis membrane module.

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