KR20160076718A - osmosis membrane aggregates having improved adhesiveness and spiral wound type osmosis membrane module comprising the same - Google Patents

Abstract

The present invention relates to an osmotic membrane assembly with outstanding adhesiveness and an osmotic membrane module including the same. More specifically, the osmotic membrane assembly of the present invention ensures excellent adhesiveness on a portion where a separation membrane and an inner spacer are bonded together, thereby preventing leakage occurring in a gap of the bonding portion.

Description

[0001] The present invention relates to an osmotic membrane assembly having excellent adhesive strength and a bamboo osmotic membrane module comprising the osmotic membrane aggregate and a spiral wound type osmosis membrane module,

The present invention relates to an osmotic membrane assembly having excellent adhesive strength and a bare-shaped osmotic membrane module comprising the same, and more particularly to an osmotic membrane assembly and an osmotic membrane assembly having excellent adhesive strength capable of preventing a clearance leak, To an osmotic membrane module comprising the same.

If a semi-permeable membrane that transmits water but does not substantially permeate the solute (ions and molecules) dissolved in water is installed between the high concentration solution and the low concentration solution, the solvent of the low concentration solution moves to the high concentration solution to achieve the concentration equilibrium Natural phenomena occur and are called "osmotic" or "osmotic phenomena". The osmotic phenomenon was discovered by German chemist M. Traube in 1867, and the osmotic pressure caused by osmosis was first measured by Pepper in 1877.

Such osmosis is the core of desalination using seawater, which is one of the ways to solve the serious water shortage due to climate change due to global warming, increase in industrial use due to industrialization, and increase in water demand due to population growth.

To obtain fresh or heavy water from seawater or wastewater, dissolved or suspended components must be removed to meet drinking water standards. At present, a water treatment method using reverse osmosis (RO), pressure retarded osmosis (PRO), and forward osmosis (FO) is widely used as a method of desalinating or dehydrating seawater or wastewater have.

The application of such an osmosis membrane to an industrial scale liquid separation requires a considerably large membrane area. Various types of membrane module types such as a flat plate module, a tubular module, a hollow fiber module, and a spiral module have been developed, and in particular, have recently been commercialized Spiral wound type modules are mainly used for osmotic membrane modules. 1, a first separator 4, an internal spacer 3, and a second separator 2 are stacked in this order to form an outflow tube (not shown) 1) is adhered to the surface of the osmotic membrane assembly, and the osmotic membrane assembly is rolled into a central outlet pipe 1 to form an osmotic membrane module.

In the function of the osmosis membrane module, the inflow water to which a constant pressure is applied passes through the first separator 4 and the second separator 2 through the inner spacer 3, which is an inlet channel, , 4) dissolved salts and organic substances are excluded during the passage, and only pure water is separated. The separated water flows along the outer spacer 5, which is a permeate spacer located between the osmotic membrane aggregates. The separated water is collected in the outflow pipe 1 located at the center and discharged to the outside of the separation membrane module.

Korean Patent Application No. 2011-0057036 discloses an antimicrobial tricot permeable water passage, a method for manufacturing the same, and a bare wound membrane module having the same, and Korean Patent Application No. 2000-0021020 discloses a bare membrane membrane module manufacturing method .

One of the requirements for the osmotic membrane assembly is that the inner spacer is placed inside and the separating membrane is enveloped in both sides of the inner spacer and the adhesive portion partially bonded along the edge has high strength so that the influent water outside the osmotic membrane assembly It should not enter the osmosis membrane aggregate. In addition, the hydraulic pressure generated by the flow of the fluid moving into the envelope from the inside of the outflow pipe must withstand the separator adhesion portion.

However, the conventional osmotic membrane aggregate is not stable in its bonding state at the bonding site, and the adhesive ability between the separating membrane and the internal spacer is lowered due to the pressure, resulting in a clearance leak so that the influent water outside the osmotic membrane aggregate There has been a problem of influx.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems as described above, and it is an object of the present invention to solve the above- Thereby providing an excellent osmotic membrane aggregate.

A second problem to be solved by the present invention is to provide an osmotic membrane module having excellent adhesion and maximized osmotic action by using an osmotic membrane aggregate formed of a bain-shaped oven.

In order to solve the above-described first problem,

The first separator, the inner spacer, and the second separator are stacked in this order, and the first separator, the inner spacer, and the second separator are stacked in this order on the outer surface of the outflow tube, Wherein the first separation membrane and the second separation membrane are stacked in this order on the support, the polymer support layer and the support layer, and the second separation membrane has a support, a polymer support layer and an active layer stacked in order, And the polymer support layer is formed inside the end of the other surface except the surface where the end of the surface except the surface connected to the outflow pipe is connected to the outflow pipe of the support, 2 separation membrane includes an adhesion portion formed between the end of the polymer support layer and the end of the support, It provides an osmotic membrane aggregate having excellent adhesive strength, characterized in that formed between the sealing region and the inner spacer group.

According to a preferred embodiment of the present invention, the adhesion of the osmotic membrane assembly having excellent adhesive strength of the present invention is carried out between the adhesion portion of the first separation membrane and the second separation membrane and the internal spacer, But also between the adhesion sites of the second separation membrane.

According to another preferred embodiment of the present invention, the adhesion of the osmotic membrane assembly having excellent adhesive strength of the present invention is made between the adhesion portion of the first separation membrane and the second separation membrane and the inner spacer, And the end of the adhesion portion of the second separation membrane.

According to another preferred embodiment of the present invention, the adhesion of the highly adhesive osmotic membrane assembly of the present invention can be made between the adhesion site and the internal spacer with an average width of 10 mm to 200 mm.

According to another preferred embodiment of the present invention, the adhesion of the osmotic membrane assembly having excellent adhesive strength of the present invention can be achieved through an adhesive containing at least one selected from urethane-based adhesive, epoxy-based adhesive and acetate-based adhesive.

According to another preferred embodiment of the present invention, the osmosis membrane assembly having excellent adhesion of the present invention has a square shape in which the first separator, the inner spacer, and the second separator are rectangular, and three surfaces except for the surface connected to the outflow tube are bonded And the polymeric support layer may be formed inside the end of three surfaces except for the surface of the polymeric support layer where the end of three surfaces except the surface connected to the outflow pipe is connected to the outflow pipe of the support .

According to another preferred embodiment of the present invention, the inner spacers of the osmotic membrane assembly having excellent adhesion of the present invention may comprise a tricot filtrate or a mesh sheet.

According to another preferred embodiment of the present invention, the mesh sheet of the osmotic membrane assembly having excellent adhesion of the present invention may have an average pore size of 6 mm 2 to 20 mm 2.

According to another preferred embodiment of the present invention, the average thickness of the inner spacer of the osmotic membrane assembly having excellent adhesive strength of the present invention may be 0.2 mm to 3.0 mm.

According to another preferred embodiment of the present invention, the supports of the first membrane and the second membrane of the osmotic membrane assembly having excellent adhesive strength of the present invention may include a nonwoven fabric or a fabric.

According to another preferred embodiment of the present invention, the average thickness of the support of the osmotic membrane assembly having excellent adhesive strength of the present invention may be 30 탆 to 160 탆.

According to another preferred embodiment of the present invention, each of said nonwoven fabric and fabric of an omepocouple assembly having excellent adhesive strength of the present invention is composed of polyester, polypropylene, nylon and polyethylene, acrylic, rayon, acetate and cellulose Synthetic fibers selected from the group; Or cellulose-based pulp-containing natural fibers; . ≪ / RTI >

According to another preferred embodiment of the present invention, the nonwoven fabric of the osmotic membrane assembly having excellent adhesive strength of the present invention has an average pore of 2 cc / cm ² / sec to 200 cc / cm ² / sec, 50 cc / cm ² / sec to 650 cc / cm ² / sec.

According to another preferred embodiment of the present invention, the fabric of the osmotic membrane assembly having excellent adhesion of the present invention includes weft and warp yarns, and the fabric has weft yarns in the width (2.54 cm) x length (2.54 cm) The number of intersections of carpenters (carpenters) may be from 150 to 500, and the fineness may be from 5 denier to 25 denier.

According to another preferred embodiment of the present invention, each of the first separator and the second separator of the osmotic membrane assembly having excellent adhesive strength of the present invention may independently have an average thickness of 70 μm to 250 μm.

Furthermore, in order to solve the second problem described above, the present invention provides an osmotic membrane module comprising a plurality of osmotic membrane assemblies wound in a spiral wound form.

The osmotic membrane assembly and the osmotic membrane module including the osmotic membrane module according to the present invention have excellent adhesive strength between the separating membrane and the internal spacer, thereby preventing the leakage of clearance from the bonded portion.

Figure 1 is a cut-away plan view showing the internal construction of a conventional bare osmosis membrane module.
2 is a perspective view of an osmotic membrane assembly according to a preferred embodiment of the present invention.
3 is a cross-sectional view of a separation membrane according to a preferred embodiment of the present invention.
4 is a perspective view of a separation membrane according to a preferred embodiment of the present invention.
5 is an exploded perspective view of a separation membrane having a bonding site according to a preferred embodiment of the present invention.
6 to 8 are exploded perspective views of an osmotic membrane assembly according to a preferred embodiment of the present invention.
9 is a perspective view of an osmosis membrane module including a pressure case according to a preferred embodiment of the present invention.
10 is an exploded perspective view of an osmosis membrane module according to a preferred embodiment of the present invention.

Hereinafter, the present invention will be described in more detail.

As described above, in the conventional osmotic membrane assembly, the adhesion state is not stable at the bonding site between the separation membrane and the inner spacer, and the bonding ability is lowered due to the pressure, resulting in a clearance leak. As a result, influent water outside the osmotic membrane- There is a problem that it flows into the inside.

Accordingly, in the present invention, an osmosis membrane aggregate comprising an osseous membrane wound on an outer circumferential surface of an outflow tube with a surface other than a surface connected to the outflow tube adhered thereto is characterized in that a first separation membrane, an inner spacer and a second separation membrane are stacked in order, Wherein the first separation membrane is stacked with an active layer, a polymer support layer and a support in order, and the second separation membrane has a support, a polymer support layer and an active layer stacked in order, and the polymer support layer of the first separation membrane and the second separation membrane, Wherein the polymer support layer is formed inside the end of the other surface excluding the surface where the end of the surface except the surface connected to the outflow pipe is connected to the outflow pipe of the support, 1 separation membrane and the second separation membrane have a bonding portion formed between the end of the polymer support layer and the end of the support, And the adhesive was sought to solve the problems described above through the osmosis membrane assembly is excellent in adhesive strength, characterized in that formed between the inner spacer and the sealing region.

Accordingly, the osmotic membrane assembly of the present invention and the osmotic membrane module including the osmotic membrane module of the present invention have an excellent adhesive force of the adhesive portion between the separation membrane and the inner spacer, thereby preventing a clearance leak occurring in the adhesive portion.

FIG. 2 is a perspective view of the osmotic membrane assembly according to a preferred embodiment of the present invention. The osmotic membrane assembly is bonded to the outer surface of the outflow tube 300 except for the surface connected to the outflow tube 300, And the first separator 100, the internal spacer 200, and the second separator 100 'are sequentially stacked.

2, the first separator 100, the inner spacer 200, and the second separator 100 'have a quadrangular shape, and three surfaces except the surface connected to the outflow tube 300 are bonded The present invention is not limited thereto and the osmotic membrane assembly may be formed by winding the first separator 100, the internal spacer 200, and the second separator 100 ' And may be wound on the outer circumferential surface of the outflow pipe 300 in a spiral shape.

The first separator 100 and the second separator 100 'are stacked in order on the active layer, the polymer support layer, and the support. The osmotic membrane aggregate of the present invention includes the active layer of the first separator 100, the first separator 100, The support of the first separation membrane 100, the inner spacer 200, the support of the second separation membrane 100 ', the polymer support layer of the second separation membrane 100', and the active layer of the second separation membrane 100 ' Are stacked in order. In other words, the support of the first separation membrane 100 is stacked on the lower part of the inner spacer 200 based on the inner spacer 200, and the support of the second separation membrane 100 'is stacked on the upper part of the inner spacer 200 do.

In other words, the lower surface of the inner spacer 200 and the support of the first separation membrane 100 are adhered to each other, and the outer surface of the inner spacer The upper surface of the first separator 200 and the support of the second separator 100 'are adhered to each other and have an envelope shape.

Such an envelope shape fluidly isolates the solution flowing into the osmotic membrane assembly and the solution flowing out of the osmotic membrane assembly, thereby forming a gap between the two solutions having different concentrations at the boundary of the membranes 100 and 100 ' Osmotic pressure can be graded.

First, the inner spacer 200 will be described.

The inner spacer 200 has a structure in which the lower surface of the inner spacer 200 and the support of the first separation membrane 100 are bonded together and the upper surface of the inner spacer 200 and the support of the second separation membrane 100 ' And the formation of a flow path in the separation membranes 100 and 100 'as feed channels can be greatly improved.

The inner spacers 200 may comprise tricot filtrate or a mesh sheet.

The tricot filtration water has a function of forming a flow path of the osmosis membrane aggregate and additionally preventing deformation of the separation membranes 100 and 100 '. As the tricot filtrate, any of tricot which can be used as the inner spacer 200 of the osmotic membrane aggregate can be used, and preferable examples thereof include polypropylene, polyethylene, poly-4-methylpentene, propylene- At least one resin selected from the group consisting of a crystalline copolymer, a polyethylene terephthalate, a polybutylene terephthalate, a polyamide and a polycarbonate, or a polyolefin modified with a polyethylene terephthalate resin copolymerized with nylon, polypropylene or an epoxy resin An ester (low melting polyethylene terephyhalate (LMP) can be used.

The mesh sheet has a flow path forming function of the osmosis membrane aggregate. The mesh sheet may be any mesh sheet that can be used as the inner spacer 200 of the osmosis membrane aggregate. Preferably, the mesh sheet is made of a polypropylene, polyethylene or a mixture of polypropylene and polyethylene Coalescence can be used as the material of the mesh sheet.

Mesh sheet has a mean pore be 6mm ² ~ 20mm ^2, preferably 9mm ² ~ 17mm ² in order to facilitate the flow path. If the air gap is 6 mm ² , There may be a problem that the flow path formation may be hindered, and if it is more than 20 mm ² , the deformation and fouling of the separation membranes 100 and 100 'may be deteriorated at a high pressure operation.

The average thickness of the inner spacer 200 may be 0.2 mm to 3 mm, preferably 0.2 mm to 2.0 mm. If the thickness of the inner spacer 200 is less than 0.2 mm, a sufficient flow passage can not be ensured and fouling may occur in the osmosis membrane module, thereby deteriorating the performance of the osmosis membrane module. It is possible to reduce the effective membrane area per unit volume in the processing of the osmosis membrane module, thereby affecting the deterioration of the module performance.

Next, the separation membranes 100 and 100 'will be described.

The first separation membrane 100 and / or the second separation membrane 100 'of the present invention may be a reverse osmosis membrane, a pressure retarded osmosis membrane, or a forward osmosis membrane.

The first separation membrane 100 and the second separation membrane 100 'may be the same or different, and at least one of the first separation membrane 100 and the second separation membrane 100' may be a pressure-delayed osmosis membrane, May all be pressure delayed osmotic membranes.

3 is a cross-sectional view of a separation membrane according to a preferred embodiment of the present invention.

Referring to FIG. 3, the first separator 100 and the second separator 100 'are formed by sequentially stacking the supports 30 and 30', the polymer support layers 20 and 20 ', and the active layers 10 and 10' As shown in FIG.

First, the support bodies 30 and 30 'can support the separation membranes 100 and 100' and impart high hydrophilicity to the support bodies 30 and 30 ', thereby allowing a flow of water flowing through the osmotic membrane assembly of the present invention It can play a role of smoothness.

The supports 30 and 30 'may have an average thickness of 80 to 160 탆, preferably 70 to 130 탆, and if the average thickness is less than 80 탆, the strength of the separator 100 and 100' If it exceeds 160 탆, flow resistance may be generated in the fluid flow, which may cause the flow rate to decrease.

The supports 30 and 30 'may be nonwoven fabrics which are intertwined with each other and have no longitudinal or transverse directionality, or fabrics woven in such a manner that they are oriented in the longitudinal and transverse directions.

Wherein each of the nonwoven and fabric is independently selected from the group consisting of polyester, polypropylene, nylon and synthetic fibers selected from the group consisting of polyethylene, acrylic, rayon, acetate, and cellulose; Natural fibers including cellulose-based pulp; . ≪ / RTI > However, the material of the nonwoven fabric and the fabric is not limited to the above description.

If the supports 30 and 30 'are nonwoven fabrics, the physical properties of the separators 100 and 100' can be controlled according to the porosity and hydrophilicity of the material. The nonwoven fabric may have an average pore of 2 to 200 cc / cm ² / sec, preferably 4 to 180 탆. When the average pore size of the nonwoven fabric satisfies 2 to 200 cc / cm ² / sec, smooth permeation of water and water permeability required for the separation membranes 100 and 100 'can be enhanced. However, the present invention is not limited to the above description.

If the support body (30, 30 ') and the average pore fabric can be ^{50 ~ 650 cc / cm 2 /} sec, it may preferably be ^{80 ~ 400 cc / cm 2 /} sec. When the average pore size of the fabric satisfies 50 to 650 cc / cm ² / sec, the pressure is within the optimum range that can exhibit the high performance of the delayed osmosis membrane. However, the present invention is not limited to the above description.

Wherein the weft and warp yarns in the support (30, 30 ') are weft yarns and warp yarns in the width (2.54 cm) x length (2.54 cm) The fineness may be between 5 and 25 denier.

Specifically, the fabric is woven with weft and warp weaving, and the intersection of weft and warp is formed. At this time, the fabric has 150 to 500, preferably 200 to 350, and preferably 5 to 25 denier crossing points of weft and warp in the width (2.54 cm) × length (2.54 cm) Can be 12 to 20 denier. As described above, when the fabric satisfies the above-mentioned physical properties, the physical properties of the separator 100, 100 'can be remarkably increased.

Average area of the interstitial space between the weft and the inclination of the fabric is 400㎛ ² ~ 8000㎛ may be ² days, and preferably it may be advantageous to improve physical properties when 2500㎛ ² ~ 7500㎛ ^2.

Next, the polymer support layers 20 and 20 'formed on the supports 30 and 30' will be described.

The polymeric support layers 20 and 20 'serve to secure a high flow rate due to the porous structure. The polymer support layers 20 and 20 'may be formed of any one or more selected from the group consisting of a polysulfone polymer, a polyamide polymer, a polyimide polymer, a polyester polymer, an olefin polymer, a halogenated polymer and a polyacrylic polymer Among them, polysulfone and polyether sulfone may be used as the polysulfone-based polymer, and polypropylene and polyethylene may be used as the olefin-based polymer. Of the halogenated polymers, polybenzimidazole polymers and polyvinylidene dipoles It can be rolled into a film. However, the present invention is not limited to the above description.

The polymer support layer may preferably have an average thickness of 20 to 100 탆. If the thickness is less than 20 탆, it may be insufficient to maintain the pressure resistance of the separation membranes 100 and 100 '. If the thickness exceeds 100 탆, . However, the present invention is not limited to the above description.

Next, the active layers 10 and 10 'formed on the polymer support layers 20 and 20' will be described.

The active layer 10, 10 'includes a polyamide-based polymer and plays a role in securing a high salt rejection rate that can remove univalent ions that are difficult to remove in a single membrane structure. Furthermore, since the physical properties required for the positive osmosis method are optimized, it is also suitable for the high concentration of seawater desorption in the osmosis membrane assembly of the present invention.

In particular, the formation of the active layer 10, 10 'is carried out in an aqueous solution containing a polyfunctional amine selected from metaphenyldiamine, paraphenyldiamine, orthophenyldiamine, piperazine or alkylated phepyridine and an alkylated aliphatic amine A polyfunctional acyl halide, a polyfunctional sulfonyl halide, or a polyfunctional isocyanate, in the presence of an organic solvent.

At least one hydrophilic functional group selected from the group consisting of a hydroxyl group, a sulfonate group, a carbonyl group, a trialkoxysilane group, an anion group and a tertiary amino group is added to an aqueous solution containing the polyfunctional amine- or alkylated aliphatic amine Group, that is, a hydrophilic amino compound may be further added.

More specifically, preferred examples of the hydrophilic compound having a hydroxy group include 1,3-diamino-2-propanol, ethanolamine, diethanolamine, 3-amino-1-propanol, Butanol, 2-amino-1-butanol. The hydrophilic compound having a carbonyl group is selected from the group consisting of aminoacetaldehyde dimethylacetal,? -Aminobutylolactone, 3-aminobenzamide, 4-aminobenzamide and N- (3-aminopropyl) -2-pyrrolidinone .

Further, as the hydrophilic compound containing trialkoxysilane group, (3-aminopropyl) triethoxysilane or (3-aminopropyl) trimethoxysilane may be selectively used.

Further, the hydrophilic compound having an anionic group may be selected from the group consisting of glycine, taurine, 3-amino-1-propylselphenic acid, 4-amino-1-butenesulfonic acid, 2-aminoethylhydrogensulfate, Amino-4-hydroxybenzoylsulfoxide, 3-amino-4-hydroxybenzenesulfonic acid, 4-aminobenzenesulfonic acid, 3-aminopropylphosphonic acid, Aminobutyric acid, 4-amino-2-hydroxybutyric acid, 4-aminobutyric acid, and glutamic acid, which may be selected from the group consisting of hydroxybenzoic acid, have.

Further, hydrophilic compounds having one or more tertiary amino groups include 3- (dimethylamino) propylamine, 3- (diethylamino) propylamine, 4- (2-aminoethyl) -Aminoethyl) piperazine, 3,3'-3,3'-diamino-N-methyldipropylamine and 1- (3-aminopropyl) imidazole.

The active layers 10 and 10 'are formed as dense surface layers of the separators 100 and 100' to form a structure resistant to the pressure resistance. At the same time, the active layers 10 and 10 ' Chemical properties and high salt rejection rate can be secured.

Accordingly, the separation membranes 100 and 100 'of the present invention are ensured of stain resistance and chemical resistance. The membrane staining property is a factor that deteriorates the performance of the osmotic membrane assembly of the present invention. However, the osmotic pressure gradient may be lowered due to membrane contamination and the filtration flux may be decreased through the membrane. However, the membrane 100, 100 ' There is an advantage in that the contamination resistance can minimize the conventional filtration plus reduction problem.

In addition, although the single membrane structure has a large pore size, it is difficult to remove a small salt such as monovalent ions, but when the polyamide-based active layer 10 or 10 'is provided, monovalent ions can be removed, And it is possible to prevent reverse solubility of the solute of the induction solution in the reverse osmosis direction.

Further, each of the first separation membrane 100 and the second separation membrane 100 'may independently have an average thickness of 70 to 250 μm, and preferably an average thickness of 80 to 200 μm. If the average thickness of the first and second separation membranes 100 and 100 'is less than 70 탆, the membrane is insufficient in strength and support of the whole membrane. If the average thickness exceeds 250 탆, And may interfere with the fluid flow and cause the flow rate to decrease. In addition, the average thickness of the first separation membrane 100 and the second separation membrane 100 'may be different from each other.

4 is a perspective view of a separation membrane according to a preferred embodiment of the present invention.

Referring to FIG. 4, the polymer support layers 20 and 20 'of the first and second separation membranes 100 and 100' have a smaller planar area than the supports 30 and 30 '. Further, the polymer supporting layers 20 and 20 'are formed inside the other surface except the surface where the end of the surface except the surface connected to the outflow pipe is connected to the outflow pipe of the support 30 or 30'.

The first separating membrane 100 and the second separating membrane 100 'of FIG. 4 are rectangular and the ends of three sides of the polymer supporting layers 20 and 20' except the surface connected to the outflow pipe are connected to the supporting bodies 30 and 30 ' ', But the present invention is not limited thereto. The first and second separation membranes 100 and 100' may have a polygonal shape. Except that a surface of the polymer supporting layer 20 or 20 'that is connected to the outflow pipe is connected to the outflow pipe of the support 30 or 30' .

The active layers 10 and 10 'stacked on the polymer supporting layers 20 and 20' may have the same area or a smaller area than those of the polymer supporting layers 20 and 20 'in plan view.

5 is an exploded perspective view of a separation membrane having a bonding site according to a preferred embodiment of the present invention.

5, the first separation membrane 100 and the second separation membrane 100 'are formed by bonding portions 35 and 35' formed between the ends of the polymer support layers 20 and 20 'and the ends of the supports 30 and 30' , And preferably includes adhesive portions 35, 35 'formed to include the surfaces of the supports 30, 30' that meet the ends of the polymeric support layers 20, 20 '. In other words, as described above, the polymer support layers 20 and 20 'are formed such that the ends of the surfaces except the surface connected to the outflow pipe (300 in FIG. 1) are connected to the outflow pipe (300 in FIG. 1) Except that the surface of the polymer supporting layer 20 or 20 'other than the surface connected to the outflow pipe (300 in FIG. 1) and the polymer supporting layer 20 or 20' ) Are laminated on the supports 20 and 20 'to form bonding portions 35 and 35' including a surface contacting the ends of the polymer support layers 20 and 20 'and the supports 20 and 20'.

6 to 8 are exploded perspective views of an osmotic membrane assembly according to a preferred embodiment of the present invention.

Referring to FIG. 6, the adhesive 37 is formed between the bonding portions 35 and 35 'of the first and second separation membranes 100 and 100' and the inner spacer 200. In other words, the adhesive 37 is formed between the bonding portion (35 in FIG. 5) formed on one surface of the support 30 of the first separation membrane 100 and one surface of the inner spacer 200, and the second separation membrane 100 ' (35 'in FIG. 5) formed on one surface of the support 30' of the inner spacer 200 and the other surface of the inner spacer 200.

The adhesion 37 between the adhesion regions 35 and 35 'and the inner spacer 200 may have an average width of 15 mm to 200 mm, preferably an average width of 25 mm to 100 mm. If the average width of the adhesive 37 is less than 15 mm, adhesive leakage may easily occur. If the average width of the adhesive 37 is more than 200 mm, the effective area of the separation membrane of the osmosis membrane module may be reduced.

Through this adhesion 37, the osmotic membrane assembly of the present invention is excellent in adhesion of the adhesion sites 35 and 35 'between the separation membranes 100 and 100' and the inner spacer 200, 5, 35, 35 ').

7, the adhesive 37 is formed between the bonding portions 35 and 35 'of the first separating film 100 and the second separating film 100' and the internal spacers 200, 1) separation membrane 100 (FIG. 5) 35 and the second separation membrane 100 '(FIG. 5) 35'.

In other words, the adhesive 37 is formed between the bonding portion (35 in FIG. 5) formed on one surface of the support 30 of the first separation membrane 100 and one surface of the inner spacer 200, and the second separation membrane 100 ' (35 'in FIG. 5) formed on one surface of the support 30' of the first separator 100 and the other surface of the inner spacer 200, and the end of the support 30 of the first separator 100 and the end of the second separator 100 ') Of the support 30'.

8, the adhesive 37 is formed between the adhesive portions 35 and 35 'of the first and second separation membranes 100 and 100' and the inner spacer 200, 1) separation membrane 100 (35 in FIG. 5) and the second separation membrane 100 (35 'in FIG. 5).

In other words, the adhesive 37 is formed between the bonding portion (35 in FIG. 5) formed on one surface of the support 30 of the first separation membrane 100 and one surface of the inner spacer 200, and the second separation membrane 100 ' (35 'in FIG. 5) formed on one surface of the support 30' of the first separator 100 and the other surface of the inner spacer 200, And the adhesive portion 35 'formed on one side of the support 30' of the second separation membrane 100 '.

The adhesive 37 may be formed through an adhesive containing at least one selected from an urethane-based adhesive, an epoxy-based adhesive, and an acetate-based adhesive.

The urethane-based adhesive may include a urethane prepolymer synthesized from a polyol and a polyisocyanate, the epoxy-based adhesive may include a bisphenol-A type epoxy, and the acetate-based composition may include a polyvinyl acetate- .

However, the present invention is not limited thereto, and a variety of materials usable in the sugarbath system can be used as an adhesive.

FIG. 9 is a perspective view of an osmosis membrane module including a pressure case according to a preferred embodiment of the present invention, and FIG. 10 is an exploded perspective view of an osmosis membrane module according to a preferred embodiment of the present invention.

9 and 10, there is shown an osmosis membrane module including a plurality of osmotic membrane assemblies of the present invention wound in a bobbin shape, wherein a plurality of osmotic membrane assemblies in the osmotic membrane module are wound around the outflow tube 300 And may be wound and positioned inside the pressure case 400. [

As described above, the osmotic membrane assembly is wound in a spiral wound around the outlet pipe 300, and wound in a spiral shape, thereby increasing the surface area of the membrane 100, 100 'of the osmotic membrane assembly contained in the pressure case 400 per unit volume So that an effective area capable of osmotic action is increased and an osmotic gradient can be formed well.

The pressure case 400 may be sized and shaped to accommodate an osmosis membrane module disposed therein. Preferably, the plurality of osmosis membrane assemblies are wound in a spiral shape. The shape of the pressure case 400 may be a cylindrical shape. However, the shape of the pressure case 400 is not limited thereto. The material of the pressure case 400 can be used without limitation in the case of the pressure case 400 used in the osmosis membrane module.

As described above, the osmosis membrane module includes a plurality of osmotic membrane assemblies wound in a spiral wound around the outlet tube 300. The cross-sectional diameter of the osmotic membrane module is determined by the diameter of the outlet tube, the number of osmotic membrane assemblies, And the like.

The outflow pipe 300 has a plurality of holes 305 formed therein and the fluid flowing through the outflow pipe 300 flows into the separation membranes 100 and 100 'of the osmosis membrane aggregate through the holes 305. Specifically, the solution A of the two solutions A and B having different concentrations flows into the pressure case 400 and the separation membrane 100, 100 'of the osmosis membrane aggregate, and the solution B flows through the holes 305 ) Into the interior of the membrane 100, 100 'of the osmotic membrane assembly. As a result, two solutions (A, B) having different concentrations are placed inside and outside the membranes 100, 100 'of the osmotic membrane assembly, thereby generating osmotic pressure. However, the two solutions A and B may be injected in the same direction as shown in FIG. 5, but this is an example. Alternatively, the solutions A and B may be injected in different directions.

The osmosis membrane module may include an outer spacer 500 between a plurality of osmotic membrane assemblies. The outer spacer 500 may be a permeate spacer and may form a flow path through which fluids such as A solution flow smoothly between different osmotic membrane aggregates.

As a result, the osmotic membrane module of the present invention includes an osmotic membrane assembly capable of preventing a clearance leak occurring in the adhesive portion due to the excellent adhesive force of the adhesive portion between the separator 100 (100 ') and the inner spacer 200 Therefore, the osmotic action can be maximized.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various changes and modifications may be made without departing from the scope of the present invention. For example, each component specifically illustrated in the embodiments of the present invention can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

The present invention will now be described more specifically with reference to the following examples. However, the following examples should not be construed as limiting the scope of the present invention, and should be construed to facilitate understanding of the present invention.

Example

Example  One

(1) Prepare first and second separators in which a support made of a PET nonwoven fabric having an average pore of 4.81 cc / cm ² / sec, a polysulfone mixed polymer support layer and a polyamide active layer are stacked in this order. In this case, the total thickness of the first and second separation membranes is 160 μm, the supports of the first and second separation membranes have a length and a length of 1000 mm, respectively, and the polymer support layer and the polyamide active layer have a width of 900 mm, The ends of the polymer support layer and the polyamide active layer are laminated so as to be formed inside the end of the support.

(2) An epoxy-impregnated PET material is injected between the support of the first separation membrane and the support layer of the second separation membrane. At this time, the transverse and longitudinal lengths to the tricot filtered water are 900 mm and 1.22 mm, respectively.

(3) The first separation membrane and the second separation membrane include an adhesion portion formed between the end of the polymer support layer and the end of the support, and the adhesion portion and the internal spacer are bonded to each other through a polyurethane adhesive to prepare an osmotic membrane assembly. At this time, the adhesive width is 50 mm.

Example  2

An osmotic pressure aggregate was prepared in the same manner as in Example 1. However, the fabric of the first and second separation membranes was made of a polyester material (350 neck, 15 denier, air permeability 84.1 cc / cm ² / sec).

Example  3

An osmotic pressure aggregate was prepared in the same manner as in Example 1. However, the inner spacers were made of a polypropylene mesh sheet having an average pore size of 6.25 mm ² .

Example  4

An osmotic pressure aggregate was prepared in the same manner as in Example 1. However, the support of the first and second separation membranes is made of polyester fabric (350 neck, 15 denier, air permeability 84.1 cc / cm ² / sec) and the inner spacer is made of polypropylene with an average pore of 6.25 mm ² Mesh sheet was used.

Comparative Example  One

An osmotic pressure aggregate was prepared in the same manner as in Example 1. However, the support, the polymer support layer and the polyamide active layer of the first and second separation membranes are 1000 mm in length and 1000 mm in length, respectively, and the ends of the support, the polymer support layer and the polyamide active layer are laminated together.

Comparative Example  2

The osmotic pressure aggregate was prepared in the same manner as in Example 2. However, the support, the polymer support layer and the polyamide active layer of the first and second separation membranes are 1000 mm in length and 1000 mm in length, respectively, and the ends of the support, the polymer support layer and the polyamide active layer are laminated together.

Comparative Example  3

The osmotic pressure aggregate was prepared in the same manner as in Example 3. However, the support, the polymer support layer and the polyamide active layer of the first and second separation membranes are 1000 mm in length and 1000 mm in length, respectively, and the ends of the support, the polymer support layer and the polyamide active layer are laminated together.

Comparative Example  4

An osmotic pressure aggregate was prepared in the same manner as in Example 4. However, the support, the polymer support layer and the polyamide active layer of the first and second separation membranes are 1000 mm in length and 1000 mm in length, respectively, and the ends of the support, the polymer support layer and the polyamide active layer are laminated together.

Experimental Example  1 - Adhesive strength test

The adhesive strength between the adhesion region of the first and second separation membranes and the inner spacer of the osmotic pressure aggregates prepared in the above Examples and Comparative Examples was measured through the following experiment and the results are shown in Table 1.

The adhesion strength test was conducted using a tensile strength measuring device (tensile tester (LLOYD INSTRUMENTS, LF-plus, USA)) and the adhesion of the first or second separation membrane of the osmotic pressure aggregates prepared in the above- (N / _mm ) at which the adhesive between the inner spacer and the inner spacer is torn off is measured. The measurement sample is 20 mm in width and 100 mm in length, and the sample is torn off when a certain amount of force is applied at both ends .

Experimental Example  2 - Module Leak  Judgment experiment

When the osmosis membrane module including four osmotic membrane assemblies manufactured in the above-described Examples and Comparative Examples was wound in a spiral wound form, the performance of the module was evaluated as to whether the osmotic membrane module exhibited stable adhesion, and the results are shown in Table 1 Respectively. The modulus criterion can be judged by evaluating the salt removal rate of the module. The evaluation conditions are 1000 ppm of NaCl and 150 psi of pressure. The salt removal rate result can be calculated by the following equation (1).

[Equation 1]

(C ₁ : influent water Conductivity [㎲ / cm], C ₂ : treated water Conductivity [㎲ / cm]

Osmotic pressure aggregate Example 1 Example 2 Example 3 Example 4 Adhesion
(N / cm) 13.2 16.0 11.2 11.5 Rej. [%] 97.8 96.4 95.3 97.5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Adhesion
(N / cm) 5.7 2.0 4.8 4.5 Rej. [%] 93.2 88.7 51.4 73.5

As shown in Table 1, it was confirmed that the osmotic pressure aggregates of the examples according to the present invention had better adhesion than the osmotic pressure aggregates of the comparative examples. In other words, it was confirmed that the osmotic pressure aggregates of the examples according to the present invention can prevent the gap leakage from the osmotic pressure aggregates of the comparative examples.

10, 10 ': active layer
20, 20 ': Polymer support layer
30, 30 ': Support
35, 35 ': Adhesion site
37: Adhesion
100: first separator
100 ': second separator
200: inner spacer
300: outflow pipe
305: Hall
400: Pressure Case
500: External Spacer

Claims (15)

And an outer surface of the outflow pipe (300) is bonded (37) to the outer surface of the outflow pipe (300) except for the surface connected to the outflow pipe (300)
The first separator 100, the inner spacer 200 and the second separator 100 'are stacked in order,
The first separation membrane 100 has an active layer 10, a polymer support layer 20, and a support 30 laminated in order,
The second separation membrane 100 'has a support 30', a polymer support layer 20 'and an active layer 10'
The polymer support layers 20 and 20 'of the first and second separation membranes 100 and 100' have a smaller planar area than the supports 30 and 30 '
The ends of the polymer supporting layer 20 and 20 'except for the surface connected to the outflow pipe 300 are connected to the end of the other surface except for the surface connected to the outflow pipe 300 of the support 30 and 30' Respectively,
The first separation membrane 100 and the second separation membrane 100 'are provided with adhesive portions 35 and 35' formed between the ends of the polymer support layers 20 and 20 'and the ends of the supports 30 and 30'≪ / RTI &
Characterized in that the adhesive (37) is made between the adhesive portion (35, 35 ') and the inner spacer.
The method according to claim 1,
Wherein the bonding is performed between an adhesion portion of the first separation membrane and the second separation membrane and the inner spacer and also between an adhesion portion of the first separation membrane and an adhesion portion of the second separation membrane.
The method according to claim 1,
Characterized in that the adhesion is made between the bonding site and the inner spacer with an average width of 10 mm to 200 mm.
The method according to claim 1,
Characterized in that the adhesion is carried out through an adhesive containing at least one selected from an urethane-based adhesive, an epoxy-based adhesive and an acetate-based adhesive.
The method according to claim 1,
The osmosis membrane module according to claim 1, wherein the first separator, the inner spacer, and the second separator are rectangular in shape, and three surfaces except for a surface connected to the outflow tube are adhered to each other and wound around the outer circumferential surface of the outflow tube,
Wherein the polymeric support layer is formed inside the end of three surfaces except the surface of the three surfaces except the surface connected to the outflow tube, the surface of which is connected to the outflow pipe of the support.
The method according to claim 1,
Characterized in that the inner spacer comprises tricot filtrate or a mesh sheet.
The method according to claim 6,
Wherein the mesh sheet has an average pore size of 6 mm < 2 > to 20 mm < 2 >.
The method according to claim 6,
Wherein the inner spacer has an average thickness of 0.2 mm to 3.0 mm.
The method according to claim 1,
Wherein the support of the first and second separation membranes comprises a nonwoven fabric or a fabric.
10. The method of claim 9,
Wherein the support has an average thickness of 30 탆 to 160 탆.
10. The method of claim 9,
Wherein each of the nonwoven and fabric is independently selected from the group consisting of polyester, polypropylene, nylon and synthetic fibers selected from the group consisting of polyethylene, acrylic, rayon, acetate, and cellulose; Or cellulose-based pulp-containing natural fibers; Wherein the osmotic membrane assembly has an excellent adhesion.
12. The method of claim 11,
Wherein the nonwoven fabric has an average pore of 2 cc / cm ² / sec to 200 cc / cm ² / sec, and the fabric has an average pore of 50 cc / cm ² / sec to 650 cc / cm ² / This excellent osmotic membrane aggregate.
12. The method of claim 11,
The fabric includes weft yarns and warp yarns and the fabric has a number of intersections (carpenters) of between 150 and 500 weft yarns and a warp yarn within a range of width (2.54 cm) x length (2.54 cm) To about 25 denier. ≪ RTI ID = 0.0 > 25. < / RTI >
The method according to claim 1,
Wherein each of the first separator and the second separator has an average thickness of 70 mu m to 250 mu m independently.
15. An osmotic membrane module comprising a plurality of osmotic membrane assemblies according to any one of claims 1 to 15 wound in a spiral wound.

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