KR20080069829A - Method for manufacturing of membrane module using hollow-fiber supporting material and device for manufacturing of tubular supporting material - Google Patents

Abstract

A method for forming a membrane using a tubular supporting body for the membrane is provided to improve productivity of the membrane by forming the tubular supporting body efficiently by using yarns, zonal nonwoven fabrics, or zonal fabrics woven with yarns, and a structure for forming the tubular supporting body is provided. A method for forming a membrane using a tubular supporting body comprises: a supporting body forming step of forming a tubular supporting body by disposing dropped yarns in a tubular shape; a membrane production step of producing a membrane by spinning an undiluted spinning solution onto the tubular supporting body while transferring the tubular supporting body; and a membrane solidification step of solidifying the membrane. A method for forming a membrane using a tubular supporting body comprises: a supporting body forming step of forming a tubular supporting body by disposing a zonal nonwoven fabric in a tubular shape; a membrane production step of producing a membrane by spinning an undiluted spinning solution onto the tubular supporting body while transferring the tubular supporting body; and a membrane solidification step of solidifying the membrane.

Description

Separation method and tubular support formation structure using tubular support {Method for manufacturing of membrane module using hollow-fiber supporting material and device for manufacturing of tubular supporting material}

1 and 3, 9 to 11, 14 and 15 is a view schematically showing the configuration of a separator manufacturing apparatus to which the present invention is applied.

2 and 8 is a diagram illustrating a configuration of a yarn feeder 100 of the separator manufacturing apparatus to which the present invention is applied.

4 to 6 are cross-sectional views showing the state of the support disposed in the central nozzle 210 of the spinneret 200.

7 is a cross-sectional view of the separator P discharged from the spinneret 200.

12 is an external perspective view of the tube forming member 700 shown in FIG.

13A and 13B are views for explaining the bonding method of the nonwoven fabric S shown in FIG.

******* Brief description of the main parts of the drawing *******

100: yarn feeder, 200: spinneret,

210: center nozzle, 220: spinning solution nozzle,

230: wire, 300: water tank,

400: winding means, 410: roller,

420: bobbin, 500, 800, 910: fusion processor,

600: plasma processor, 700: tube forming member,

900: reinforcement feeder.

A: spinning stock solution, P: membrane,

S: non-woven fabric, T: fabric,

K: Stiffener.

The present invention enables the formation of a tubular support using a yarn, a band-shaped nonwoven fabric, or a band-woven fabric woven with yarn, thereby forming a separator using a tubular support for the separation membrane to improve productivity of the separation membrane. A method and a tubular support forming structure.

Generally, separation membrane technology is one of separation technologies using a material selective permeation property of a polymer material, and is classified into a flat membrane, a tubular membrane, and a hollow fiber membrane according to its form.

The separation membrane has been actively applied because of the advantages of large membrane surface area and easy modularization compared to other membranes having the same volume. For example, separators are commonly used for advanced water treatment, water treatment, effluent treatment, and air purification.

The separation membrane is usually completed by weaving yarns to form a support, and spinning the spinning stock solution on the support to coagulate with the support. Here, the support serves to maintain the coagulated spinning solution in a specific form and to improve the strength of the separator. The formation of the separator using the support is performed by forming a support using a yarn and forming the separator using the support through a series of continuous processes.

However, the weaving of the support using the yarn takes a very long time, and thus there is a problem in that the productivity of the separator is very low because it takes a long time to form the separator.

Accordingly, the present invention has been made in view of the above circumstances, and provides a separation membrane formation method and a tubular support forming structure using a tubular support, which can improve the productivity by forming a tubular support more efficiently. There is this.

Separator forming method using a tubular support according to the first aspect of the present invention for achieving the above object is a support forming step of forming a tubular support by arranging the stretched yarn to be tubular, and spinning stock solution while transferring the tubular support It characterized in that it comprises a membrane generation step of producing a separator by spinning to the tubular support, and the membrane coagulation step of solidifying the separator.

In addition, the separation membrane forming method using the tubular support of the present invention is a support forming step of forming a tubular support by rolling the band-shaped nonwoven fabric in a tubular form, and spinning the spinning stock solution while transporting the tubular support to form a separation membrane It characterized in that it comprises a separator generation step to produce, and a membrane coagulation step of coagulating the separator.

In addition, the separator forming method using another tubular support of the present invention Strip Includes a membrane coagulation step of forming the non-woven fabric into a tubular form while feeding the the support forming step of constituting the tubular support, the tubular support clotting the membrane generation step and the separation membrane by radiation the spinning solution in the tubular support to produce a membrane Characterized in that the configuration.

In addition, the separation membrane forming method using another tubular support of the present invention is a support forming step of forming a tubular support by rolling the strip-like fabric in a tubular form, and spinning the spinning stock solution to the tubular support while transporting the tubular support to form a separation membrane It characterized in that it comprises a separator generation step to produce, and a membrane coagulation step of coagulating the separator.

In addition, the separation membrane formation method using another tubular support of the present invention is a support forming step of forming a tubular fabric to form a tubular support to form a tubular support, and spinning the spinning stock solution to the tubular support while transporting the tubular support membrane It characterized in that it comprises a membrane generation step of generating a, and a membrane coagulation step of coagulating the separator.

Further, the tubular support forming structure according to the second aspect of the present invention is a tubular support forming structure in which a band-shaped nonwoven fabric or fabric is rolled in a tubular form to form a tubular support to provide a spinneret for forming a separator. The inner circumferential surface of the one side is provided with a rotation preventing jaw for rotating the other end while preventing the rotation of one end of the belt-shaped nonwoven or fabric flowing from the upper side along the longitudinal direction, the rotation preventing jaw is the inner peripheral diameter of the body It is characterized in that it is configured to be inclined toward the inner center of the body to be narrowed toward the lower side.

That is, according to the above, it is possible to produce a separation membrane in a shorter time by spinning the spinning stock solution while transferring the tubular support in a state where the yarns are arranged in a tubular form or the yarns arranged in tubular form are superimposed.

In addition, it is possible to produce a separation membrane in a shorter time by transferring a strip-like support made of a nonwoven fabric or a fabric previously woven by yarn to make a tubular shape, and spinning the spinning stock solution on the support.

Hereinafter, embodiments according to the present invention will be described.

1 is a cross-sectional view schematically showing the configuration of a membrane manufacturing apparatus to which a membrane forming method using a tubular support according to the present invention is applied.

As shown in FIG. 1, the separator manufacturing apparatus to which the present invention is applied is provided with a yarn feeder 100 for arranging a plurality of yarns 101 to provide a tubular support, and a yarn disposed under the yarn feeder 100. A spinneret 200 for spinning the spinning solution (A) to a support supplied from the feeder 100 to form a separator P, and a water tank 300 for solidifying the separator P discharged from the spinneret 200. And, it comprises a winding means 400 for winding the separation membrane (P) generated via the water tank (300).

The yarn feeder 100 is a plurality of weaving cones 120, the yarn 101 is wound on the upper surface of the body 110 of the circular plate shape of the center hollow with a certain thickness as shown in Figure 2 Is provided, the hollow portion of the body 110 may be configured to be coupled to the yarn inlet 130 having a plurality of holes 131 through which the yarn 101 is introduced. In addition, the yarn supplier 100 may be configured in a structure that radiates the yarn. Here, the yarn 101 provided from the yarn feeder 100 may be a mono-filament such as polyester or nylon, or multi-filament, or a mixture of mono-filament and multi-filament. have.

The spinneret 200 extends along a central longitudinal axis and includes a central nozzle 210 having a support inlet 201 and a membrane discharge port 202 into which a support provided from the yarn feeder 100 is introduced, and the central nozzle ( It is configured to include a spinning solution nozzle 220 is formed in communication with the intermediate side of the 210 to join the spinning solution (A) to the support. Here, the spinning solution (A) is composed of a polymer, an additive and a solvent, for example, the polymer is polyvinylidene fluoride (PVDF), ECTFG, polyacrylonitrile, polyacrylonitrile copolymer, polysulfone ), Sulfonated polysulfone, polyestersulfone, cellulose acetate, cellulose triacetate, polymethyl methacrylate and mixtures thereof Can be configured. In addition, the additive may be composed of a group consisting of water, methyl alcohol, ethyl alcohol, ethylene glycol, polyethylene glycol, polypropylene glycol, glycerin, polyvinyl pyrrolidone (PVP), and mixtures thereof. In addition, the solvent is N-methyl-2-pyrrolidone (NMP: N-methyl-2-pyrrolidone), dimethyl formamide (DMF: dimethyl formamide), dimethyl acetamide (DMAc: dimethyl acetamide), chloroform (chloroform) , Tetrahydrofuran (tetrahhydrofuran) and mixtures thereof. In addition, the spinneret 200 is disposed to extend along the central longitudinal axis of the central nozzle 210 while having a diameter smaller than the inner diameter of the central nozzle 210 as shown in Figure 3 spinneret 200 It may be configured to further include a rod-shaped wire 230 to maintain the shape of the separation membrane (P) discharged from the stable.

The yarn coagulated liquid stored in the water tank 300 may be water (W), the water tank 300 is the size of the pores formed in the separation membrane (P) through the temperature control of the water (W) stored therein Will be adjusted. Here, various methods may be applied to a technique for forming pores in the separator P.

The winding means 400 includes a roller 410 for transferring the separation membrane via the water tank 300 and a bobbin 420 for winding the separation membrane transferred through the roller 410.

Next, a method of forming a separator according to the present invention using the separator manufacturing apparatus shown in FIG. 1 will be described.

First, one end of the yarn 101 provided from the yarn feeder 100 is formed on the central nozzle 210 of the spinneret 200 to form a tubular support, and then the bobbin 420 through the water tank 300. To At this time, the tubular yarn 101 constituting the support is longitudinally disposed inside the central nozzle 210 as shown in FIG. In addition, in the separator manufacturing apparatus as shown in FIG. 3, the tubular yarn 101 constituting the support is longitudinally disposed outside the wire 230 as shown in FIG. 5. In this case, the tubular support may be formed by forming a multilayer of yarns 101 arranged in a tubular shape as shown in FIG.

In the above state, the spinning solution (A) is injected into the central nozzle 210 of the spinneret 200 through the spinning solution nozzle 220 of the spinneret 200. At the same time, the bobbin 420 is operated to transfer the support downward in the longitudinal direction of the central nozzle 210. At this time, the membrane discharge port 202 of the spinneret 200 discharges the separation membrane P in a state where the radiation source solution A is coated on the tubular yarn 101 constituting the support as shown in FIG. do.

Thereafter, the separation membrane P discharged from the spinneret 200 forms a separation membrane in a state in which pores are formed through the yarn coagulation liquid 300, that is, the water tank 300 in which the water W is stored, and the roller 410. The bobbin 420 is wound around.

According to the above embodiment, a simple method of spinning the spinning stock solution (A) on the tubular support while forming the tubular support by forming the tubular support on the central nozzle 210 of the spinneret 200 without weaving the yarn 101 separately. By manufacturing the separation membrane P, the separation membrane can be produced in a short time.

On the other hand, in the present invention, there may be a method of forming a tubular support by overlapping the yarn 101 hanged down to the spinneret 200 to enhance the strength of the separator.

First, a state in which one end of the yarn 101 arranged in a tubular shape provided by the yarn feeder 100 passes through the central nozzle 210 of the spinneret 200 and is coupled to the bobbin 420 through the water tank 300. In the yarn feeder 100, the yarn 101 is shaken in the S direction, the Z direction or the SZ direction to drive the bobbin 420 while the yarns 101 overlap. Here, the technique of shaking the yarn 101 in the S direction, the Z direction or the SZ direction is the same as the method of forming the twist of the optical fiber, and thus its detailed description is omitted. At this time, the yarn feeder 100 has a predetermined rotating member 140 to rotate the yarn inlet 130 or the body 110 left or right or rotate in one direction as shown in FIG. It can be configured to automatically shake the yarn 101 (cross-sectional view of Figure 2). For example, the rotating member 140 is a coil 141 wound around the yarn inlet 130, a magnet 142 formed on the body 120 side of the coil 141 facing the yarn 141, and a yarn inlet ( It may be configured to rotate the yarn inlet 130 or the body 120 by providing a current to the coil 141 having a bearing 143 to facilitate the transfer of 130. In addition, in the present invention, as shown in Figure 9 in order to stably maintain the overlap state between the yarn 101 provided from the yarn supplier 100, fusion fusion using, for example, heat or ultrasonic wave 101 After performing the fusion process through the processor 500 may be configured to provide to the spinneret 200.

In addition, as a method of forming the tubular support by overlapping the yarns 101, as shown in FIG. 10, the plasma processor 500 is placed on the yarns 101 hanging from the yarn feeder 100 to the spinneret 200. As shown in FIG. There is a method of performing a plasma treatment through. That is, since static electricity is generated in the yarn 101 by the plasma, the yarn 101 automatically forms a spaghetti type twist and overlaps each other. At this time, the plasma treatment also provides a function of fusing the overlapped yarn 101. In the present exemplary embodiment, the yarn 101 in the superposed state, which is plasma-processed, may be fused more stably through the above-described separate apparatus, that is, a fusion processor (not shown) using heat or ultrasonic waves.

On the other hand, in the present invention, in order to strengthen the separation membrane, instead of the yarn 101, the band-shaped nonwoven fabric S may be rolled to form a support to form a support.

At this time, the upper side of the spinneret 200 is provided with a tube forming member 700 for rolling a strip of nonwoven fabric (S) in a tubular shape, as shown in FIG. As shown in FIG. 12, the tube forming member 700 rotates the other end of the nonwoven fabric S while preventing the rotation of one end of the nonwoven fabric S introduced from the upper side in the longitudinal direction on one side of the inner circumferential surface of the tubular body. The anti-rotation jaw 701 for forming a portion overlap is formed. At this time, the anti-rotation jaw 701 is formed to be inclined toward the inner center of the body becomes narrower as the inner peripheral diameter of the body toward the lower side. Therefore, the strip-shaped nonwoven fabric S is introduced into the spinneret 200 while being rolled in a tubular shape by the tube forming member 700.

In addition, in order to maintain the tubular shape of the nonwoven fabric S stably, it can carry out so that an overlapping part may be bonded. Accordingly, as shown in FIG. 13A, an adhesive inlet hole (not shown) is formed at a position where one side of the tube forming member 700, more specifically, a portion forming an inner side of the nonwoven fabric S, is disposed. , The adhesive supply unit 710 for discharging the adhesive in a fixed amount to the adhesive inlet hole can be configured. That is, the band-shaped nonwoven fabric (S) is curled by the tube forming member 700, the adhesive flowing through the adhesive inlet hole is buried in one end of the nonwoven fabric (S), one end of the nonwoven fabric (S) buried adhesive Rotating inside the tube forming member 700 and overlaps with the other end of the nonwoven fabric S caught on the anti-rotation jaw 701, the tubular nonwoven fabric S is discharged in a state where the overlapping portion is firmly bonded. In addition, as a method for bonding the overlapping portion of the nonwoven fabric S, as shown in FIG. 13B, the fusion processor 800 using heat, ultrasonic waves, or plasma may be used as the overlapping portion of the nonwoven fabric S discharged from the tube forming member 700. It is also possible to bond using). In addition, the band-shaped nonwoven fabric (S) is not shown, but may be carried out so as to enter the spinneret 200 after forming the tubular support by sewing in a tubular shape in advance.

On the other hand, in the present invention, it is also possible to form a tubular support by wrapping the belt-shaped fabric produced by weaving the yarn instead of the belt-shaped nonwoven fabric S in a tubular form or sewing in a tubular form in advance. At this time, since the method of forming the tubular support using the band-shaped fabric is the same as the method of forming the tubular support of the nonwoven fabric (S), a detailed description thereof will be omitted.

In addition, in the present invention, as shown in Figure 14a is provided with a support rod 250 having a diameter less than the inner diameter along the central longitudinal axis of the central nozzle 210 of the spinneret 200, The yarn feeder 100 for discharging the fabric is configured to rotate around the support rod 250 at a constant speed at the top of the spinneret 200, so that the support P having a shape as shown in FIG. 14B is discharged. can do. At this time, the rotational speed of the yarn feeder 100 is set to correspond to the speed moved downward by the bobbin 420 so that the belt-shaped nonwoven or fabric overlaps a certain portion. 14B illustrates a shape in which the strip-shaped fabric T discharged from the yarn supply unit 100 flows into the spinneret 200. Although not shown, the yarn feeder 100 is provided with a fusion processor using heat, ultrasonic waves or plasma to bond the overlapping portions of the band-shaped nonwoven fabric S or the fabric T to the spinneret 200. It is also possible to carry out to supply).

On the other hand, in the present invention, it is possible to carry out to form a tubular support by wrapping the outer side of the yarn 101 that is hung in a tubular shape with a band-shaped reinforcing material in order to enhance the strength of the separation membrane.

At this time, the upper side of the spinneret 200, as shown in Figure 15a is a reinforcing material supplier for discharging the band-shaped reinforcement (K) It is arranged to rotate the periphery of the yarn 101 arranged in a tubular shape. The reinforcing material (K) may be composed of a fabric produced by weaving a band-shaped nonwoven fabric or yarn. That is, the reinforcing material supplier 900 is the yarn 101 is introduced into the spinneret 200 by the bobbin 420 in a state in which the start end of the reinforcing material (K) is fixed in a state formed inclined at a predetermined angle to the yarn 101. The periphery of the yarn 101 is rotated to correspond to the speed. At this time, the rotational speed of the reinforcing material supplier 900 may be set to overlap a portion of the band-shaped reinforcing material (K) as shown in Figure 15b. 15B illustrates the shape of the support flowing into the spinneret 200. In addition, in the above embodiment, as shown in FIG. 15C, a fusion processor 910 using heat, ultrasonic waves or plasma is provided below the reinforcing material supply 900, and the tubular yarn 101 and the yarn 101 are provided. It is also possible to adhere | attach the overlapping part of the reinforcement K and the reinforcement K which surround the outer side of the inside, and it can also implement so that the shape of a tubular support may be maintained more stably.

That is, according to the above embodiment, the tubular support can be efficiently formed using a yarn, a band-shaped nonwoven fabric, or a band-woven fabric woven with yarn, thereby improving the productivity of the separator.

On the other hand, the present invention is not limited to the above embodiments and can be carried out in various modifications without departing from the technical spirit of the present invention.

As described above, according to the present invention, the tubular support can be efficiently formed using a yarn, a band-shaped nonwoven fabric, or a band-woven fabric woven with yarn, thereby improving the productivity of the separator.

Claims (18)

A support forming step of forming the tubular support by arranging the stretched yarn to be tubular; Separation membrane generating step of generating a separator by spinning the spinning stock solution to the tubular support while transporting the tubular support, Separator forming method using a tubular support, characterized in that it comprises a separator coagulation step of solidifying the separator. The method of claim 1, The support forming step is a membrane forming method using a tubular support, characterized in that to form a tubular support by overlapping the yarns. The method of claim 2, The tubular support is a separation membrane forming method using a tubular support, characterized in that for forming the overlap between the yarn by shaking the yarn arranged in a tubular form. The method of claim 3, The tubular support is a membrane forming method using a tubular support, characterized in that formed by fusing the overlapping yarns. The method of claim 2, The tubular support is a membrane forming method using a tubular support, characterized in that the yarn formed in a tubular arrangement arranged in a plasma process. The method of claim 1, The tubular support is a membrane forming method using a tubular support, characterized in that the outer side of the yarn arranged in a tubular configuration is configured to be wrapped in a band-shaped reinforcement. The method of claim 6, The reinforcing material is a membrane forming method using a tubular support, characterized in that one of the fabric formed by weaving a nonwoven fabric or yarn. The method according to any one of claims 1 to 7, The tubular support is a membrane-forming method using a tubular support, characterized in that the yarn is formed in a multi-layer arranged in the form of tubular. A support forming step of forming a strip-shaped nonwoven in a tubular shape to form a tubular support; Separation membrane generating step of generating a separator by spinning the spinning stock solution to the tubular support while transporting the tubular support, Separator forming method using a tubular support, characterized in that it comprises a separator coagulation step of solidifying the separator. The method of claim 9, The support forming step is a membrane forming method using a tubular support, characterized in that to form a tubular support by bonding the overlapping portion of the nonwoven fabric rolled in a tubular form. The method of claim 9 or 10, The support forming step is a separation membrane forming method using a tubular support, characterized in that formed by sewing a band-shaped nonwoven fabric in the form of a tube. A support forming step of forming a tubular fabric to form a tubular support, Separation membrane generating step of generating a separator by spinning the spinning stock solution to the tubular support while transporting the tubular support, Separator forming method using a tubular support, characterized in that it comprises a separator coagulation step of solidifying the separator. The method of claim 12, The fabric is a membrane forming method using a tubular support, characterized in that formed by weaving yarn. The method according to claim 12 or 13, Separating method using a tubular support characterized in that the belt-shaped fabric is sealed in the form of a tubular support. A support forming step of forming a tubular support by rotating the upper portion of the rod extending from the upper side of the spinneret to the longitudinal axis while transferring the strip-shaped nonwoven fabric at a constant speed; Separation membrane generating step of generating a separator by spinning the spinning stock solution to the tubular support while transporting the tubular support, Separator forming method using a tubular support, characterized in that it comprises a separator coagulation step of solidifying the separator. A support forming step of forming a tubular support by rotating the upper band of the rod extending from the upper side of the spinneret to the longitudinal axis while transferring the strip-shaped fabric to the bottom of the spinneret at a constant speed; Separation membrane generating step of generating a separator by spinning the spinning stock solution to the tubular support while transporting the tubular support, Separator forming method using a tubular support, characterized in that it comprises a separator coagulation step of solidifying the separator. The method of claim 16, The strip-shaped fabric is a membrane forming method using a tubular support, characterized in that formed by weaving yarn. In the tubular support forming structure in which a band-shaped nonwoven fabric or fabric is rolled in a tubular form to form a tubular support and provided as a spinneret for forming a separator, One end of the inner circumferential surface of the tubular body is provided with a rotation prevention jaw for rotating the other end while preventing the rotation of one end of the belt-shaped nonwoven or fabric flowing from the upper side along the longitudinal direction, The anti-rotation jaw is tubular support forming structure, characterized in that configured to be inclined toward the inner center of the body so that the inner peripheral diameter of the body becomes narrower toward the lower side.

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