JPH1099658A - Method for bonding and fixing end parts of hollow yarn membranes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a hollow yarn membrane module with good productivity by easily and certainly injecting a potting agent into the end parts of hollow yarn membranes. SOLUTION: When a hollow yarn membrane module is produced by injecting a potting agent 5 into the end parts of a plurality of hollow yarn membranes 3 to bond and fix the end parts of the hollow yarn membranes, the supply liquid surface of the potting agent 5 is set to a high position generating liquid surface difference with respect to the potting agent injection position of the end parts of the hollow yarn membranes and the potting agent 5 is injected into the end parts of the hollow yarn membranes under its own wt. or under pressure through a communication tube 6. As the potting agent, one of which the viscosity at a time of the completion of injection is 50,000cPs or less is pref. used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for bonding and fixing an end portion of a hollow fiber membrane in manufacturing a hollow fiber membrane module.

[0002]

2. Description of the Related Art Conventionally, in a hollow fiber membrane module, for example, an end of a hollow fiber membrane bundle composed of a plurality of hollow fiber membranes filled in a cylindrical support such as a cylindrical housing is bonded and fixed with a potting agent. Injecting the potting agent into the end of the hollow fiber membrane using a centrifugal potting device, immersing the end of the hollow fiber membrane in the potting agent, or placing the potting agent on the end of the hollow fiber membrane Is applied.

However, in the method using a centrifugal potting device, a special centrifugal device must be used.
In addition, there is a problem that it takes a long time to set in the apparatus, and the method of dipping or applying the potting agent in the potting agent has a problem that the potting agent cannot be reliably injected into the end of the hollow fiber membrane.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to easily and surely inject a potting agent into the end of a hollow fiber membrane without using a special device, and to obtain a hollow fiber membrane module with high productivity. To get.

[0005]

According to the present invention, a potting agent is injected into the ends of a plurality of hollow fiber membranes, and the ends of the hollow fiber membranes are bonded and fixed to produce a hollow fiber membrane module. The supply liquid level of the potting agent is set at a higher position that causes a liquid level difference with the end position of the hollow fiber membrane where the liquid is injected,
A method of bonding and fixing an end of a hollow fiber membrane, wherein a potting agent is injected into the end of the hollow fiber membrane by its own weight or further pressurization through a communication pipe.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is applied to the production of a hollow fiber membrane module in which the ends of a plurality of hollow fiber membranes are adhered and fixed with a potting agent.

[0007] As the hollow fiber membrane in the present invention, any known hollow fiber membrane used as a liquid or gas filtration membrane or separation membrane is used. For example, polyolefin such as polyethylene and polypropylene, polysulfone, polyamide, polyimide, cellulose and the like. In the case of a hollow fiber membrane made of a material such as polytetrafluoroethylene or polyvinylidene fluoride, or a hollow fiber membrane made of a hydrophobic material, a hollow fiber membrane made more hydrophilic may be used. The hollow fiber membrane may be a homogeneous membrane, an asymmetric membrane, or a composite membrane.

In the present invention, when the potting agent is injected into the ends of the plurality of hollow fiber membranes, the supply liquid of the potting agent and the supply liquid of the potting agent are located at the end of the hollow fiber membrane where the potting agent is injected. The surface is provided with a higher liquid level difference, and using a communication pipe, a potting agent supplied from one end of the communication pipe via this communication pipe, preferably a potting agent having a viscosity at the end of injection of 50,000 cps or less is used. It is injected into the end of the hollow fiber membrane by its own weight or further pressure.

[0009] The potting agent may be injected from any direction below, laterally or obliquely below the end of the hollow fiber membrane.
Moreover, you may combine injection directions as needed. As the liquid level difference between the supply level of the potting agent and the end of the hollow fiber membrane into which the potting agent is injected increases, the injection time becomes shorter. Further, in the present invention, as the support of the hollow fiber membrane, a rod-shaped support or a cylindrical support capable of accommodating the hollow fiber membrane may be used, and the injection of the potting agent is performed in a state supported by the support. May be performed.

The communicating pipe used is preferably a U-shaped or J-shaped tubular body having a structure in which both ends are open and a potting agent supplied from one end flows down and flows out from the other end. Instead, it may be a flexible tubular body that forms a U-shape or a J-shape when the potting agent is injected into the end of the hollow fiber membrane. In addition, the size of the opening of the communication pipe may be different at both ends. In the present invention, a jig for fixing the support filled with the hollow fiber membrane and injecting it from the lower end of the end of the hollow fiber membrane is used, and the end of the hollow fiber membrane is filled through the jig. You may make it inject | pour into a part.

The step of injecting a potting agent into the end of the hollow fiber membrane in the present invention will be described with reference to the drawings. FIG.
Is a process diagram of an example in a case where a potting agent is injected into the end portion of the hollow fiber membrane by its own weight, and FIG. 2 is a process diagram of an example in a case where the potting agent is injected into the end portion of the hollow fiber membrane by pressurization. is there. In the figure, 1 is a cylindrical housing, 2 is a hollow fiber membrane,
3 is a potting jig, 4 is a potting agent pot, 5
Represents a potting agent, 6 represents a communication tube, 7 represents a pot lid, and 8 represents a pressurizing port.

In FIG. 1, a cylindrical housing 1 is filled with a hollow fiber membrane bundle composed of a plurality of hollow fiber membranes 2, and the potting end of the cylindrical housing 1 is mounted on a potting jig 3. The potting jig 3 has a connection port at the bottom thereof that can be connected to the communication pipe 6, and has a receiving portion that fits into the lower end of the cylindrical housing 1 on the filling side of the hollow fiber membrane end. Potting jig 3 and potting agent pot 4
Are connected by a communication pipe 6 at their bottoms, and the receiving portion of the potting jig 3 forms an immersion tank for the potting agent 5.

The potting agent pot 4 is located at a position where the liquid level of the supplied potting agent 5 in the potting agent pot 4 is higher than the position of the end of the hollow fiber membrane 2 where the potting agent 5 is adhered and fixed. It is installed in.
When the potting agent 5 is supplied to the potting agent pot 4, the potting agent 5 flows down in the communication pipe 6 by its own weight and becomes hollow from the lower end of the potting end of the cylindrical housing 1 attached to the potting jig 3. It is injected into the end of the fibrous membrane and the operation is completed.

Further, in FIG. 2, the potting agent 5
Is pressure-fed through the communication pipe 6 by pressurization from the pressurizing port 8 of the pot lid 7 of the potting agent pot 4, and the end of the hollow fiber membrane of the cylindrical housing 1 mounted on the potting jig 3 has its own weight only. Is injected in a shorter time than in the case of As a pressurizing method, an arbitrary method such as a method using a compressed gas such as air or a method using a syringe is used. When the potting agent 5 is injected by pressurization, the potting agent pot 4 can be placed in the potting agent pot 4 even when the difference in liquid level between the supply liquid level of the potting agent and the end position of the hollow fiber membrane into which the potting agent is injected is smaller than in the case of only the own weight. Well, the injection is more effective. Further, when the potting agent 5 is injected into the end of the hollow fiber membrane, vibration may be applied to the cylindrical housing 1 or the potting jig 3.

Examples of the potting agent include urethane resins, glycidyl ethers and glycidyl esters obtained from polyisocyanate components such as tolylene diisocyanate, diphenylmethane diisocyanate and polyphenylmethane diisocyanate and polyester polyols, castor oil, castor oil derivatives, amines and diamines. , Glycidylamine, aliphatic epoxides, epoxy resins such as alicyclic epoxides and epoxy resins obtained from alicyclic amines, polyamides, aromatic polyamines, acid anhydrides and the like. May be contained.

In the present invention, the potting agent has a viscosity of 50,000 at the end of injection into the end of the hollow fiber membrane.
Potting agents having cps or less are preferably used. During the injection into the end of the hollow fiber membrane, the viscosity becomes 50,000.
When a potting agent exceeding cps is used, it is difficult to inject a required amount of the potting agent, and problems such as generation of a potting agent unfilled portion and insufficient strength are likely to occur. The potting agent is preferably selected according to the size of the hollow fiber membrane module other than the viscosity.

[0017]

The present invention will be described below in more detail with reference to examples.

Example 1 A three-layer composite hollow fiber membrane MHF (manufactured by Mitsubishi Rayon Co., Ltd., nonporous homogeneous layer: segmented polyurethane, porous layer: polyethylene) was used as the hollow fiber membrane. A knitted fabric having a length of 8,400 mm and a number of 122,000 was knitted. This knitted fabric is spirally wound into a wound layer, and has an inner diameter of 147 mm and an outer diameter of 165 m.
m, and was inserted into a cylindrical housing made of polyvinyl chloride resin having a length of 500 mm and filled so that both ends of the wound body slightly protruded. Next, a potting jig was attached to both ends of the cylindrical housing, and the potting jig was set on a gantry in an upright state.
From the lower potting jig and this potting jig
The potting agent pot placed at a height of 50 mm was connected with a communicating pipe made of polyvinyl chloride resin having an inner diameter of 15 mm, an outer diameter of 17 mm, and a length of 600 mm.

As a potting agent, coronate C4
403 (manufactured by Nippon Polyurethane Industry Co., Ltd., diphenylmethane diisocyanate / polyethylene glycol prepolymer) and Nipporan N4276 (manufactured by Nippon Polyurethane Industry Co., Ltd., castor oil derivative) were mixed at a weight ratio of 62:38, and defoamed. Potting agent (total weight 12
00g) was used.

The operation of injecting the potting agent into the end of the wound body inserted into the cylindrical housing is performed at 25 ° C. immediately after the preparation.
Of the potting agent was put into the potting agent pot, but the injection was completed in about 30 minutes. In addition,
The viscosity of the potting agent at the end of the injection is 6,000 cps
Met. Thereafter, it was left at 25 ° C. for 15 hours to complete the adhesive fixation, and the same procedure was applied to the other end of the wound layer inserted into the cylindrical housing to perform the adhesive fixation.

After removing the potting jig, both ends of the wound layer body protruding from the cylindrical housing were cut to obtain a hollow fiber membrane module in which both ends of the three-layer composite hollow fiber membrane were open. The obtained hollow fiber membrane module was set in a water pressure leak inspection apparatus, and the pressure was 1 kg / cm ² , the time was 10 minutes, and the pressing direction was the water from the adhesive fixing portion under the condition of out-in to the hollow fiber membrane. Was inspected for the presence or absence of leakage, and the results are shown in Table 1.

(Example 2) In Example 1, the potting agents were Coronate C4403 (manufactured by Nippon Polyurethane Industry Co., Ltd., diphenylmethane diisocyanate / polyethylene glycol prepolymer) and Nipporan N4.
221 (manufactured by Nippon Polyurethane Industry Co., Ltd., castor oil derivative) was mixed at a weight ratio of 58:42, and a hollow fiber membrane module was obtained in the same manner as in Example 1 except that the potting agent was prepared by defoaming. Was. The viscosity of the potting agent at the end of the injection was 10,000 cps. Table 1 shows the result of the water pressure leak test of the obtained hollow fiber membrane module.

Example 3 In Example 1, the potting agent was changed to BPA-328 (manufactured by Nippon Shokubai Co., Ltd., acrylic rubber fine particle dispersed bisphenol A type epoxy resin),
Epikote 834 (manufactured by Yuka Shell Epoxy Co., Ltd., bisphenol A glycidyl ether type epoxy resin), FLEP 60 (manufactured by Toraythiol Co., Ltd., modified epoxy resin), PACM (manufactured by ACI Japan Co., Ltd., alicyclic polyamine) Was mixed in a weight ratio of 50: 25: 25: 22, and a hollow fiber membrane module was obtained in the same manner as in Example 1 except that the potting agent prepared by defoaming was used. The viscosity of the potting agent at the end of the injection was 6,000 cps. Table 1 shows the result of the water pressure leak test of the obtained hollow fiber membrane module.

(Example 4) A hollow fiber membrane module was obtained in the same manner as in Example 1, except that the potting agent pot was pressurized with compressed air during the potting agent injection operation. The viscosity of the potting agent at the end of the injection was 3,000 cps. Table 1 shows the result of the water pressure leak test of the obtained hollow fiber membrane module. The pressurizing pressure is 0.5 kg / cm ² , and the injection time is about 10
Minutes.

Example 5 A three-layer composite hollow fiber membrane MHF (manufactured by Mitsubishi Rayon Co., Ltd., non-porous homogeneous layer) as a hollow fiber membrane:
Segmented polyurethane, porous layer: polyethylene)
245mm width, 1,500mm length knitted using
22,000 knitted fabrics, inner diameter 64 mm, outer diameter 72 m
Using a cylindrical housing made of polycarbonate resin having a length of 215 mm and a length of 215 mm, a potting jig was attached to an end of the housing in the same manner as in Example 1, and the housing was set.
Next, the lower potting jig and the potting agent pot placed at a height of 120 mm from the potting jig were placed with an inner diameter of 15 mm, an outer diameter of 17 mm, and a length of 290.
mm with a communicating pipe made of polyvinyl chloride resin.

As a potting agent, coronate C4
403 (manufactured by Nippon Polyurethane Industry Co., Ltd., diphenylmethane diisocyanate / polyethylene glycol prepolymer) and Nipporan N4224 (manufactured by Nippon Polyurethane Industry Co., Ltd., castor oil derivative) were mixed at a weight ratio of 60:40 and defoamed. Potting agent (total weight 11
0g), and the injecting operation was performed in the same manner as in Example 1.
The injection was completed in about 15 minutes. The viscosity of the potting agent at the end of the injection was 6,000 cps. Thereafter, the same operation as in Example 1 was performed to obtain a hollow fiber membrane module. Table 1 shows the result of the water pressure leak test of the obtained hollow fiber membrane module.

(Example 6) A three-layer composite hollow fiber membrane MHF (manufactured by Mitsubishi Rayon Co., Ltd., non-porous homogeneous layer) as a hollow fiber membrane:
Segmented polyurethane, porous layer: polyethylene)
110mm width, 30mm length, 4 pieces knitted using
00 knitted fabric, inner diameter 9 mm, outer diameter 13 mm, length 100
A potting jig was attached to the end of the housing in the same manner as in Example 1 using a cylindrical housing made of a polycarbonate resin having a thickness of 2 mm and set on a gantry. Next, the lower potting jig and 60 mm from this potting jig
Was connected to a potting agent pot placed at a height of 4 mm by a communicating pipe made of polyvinyl chloride resin having an inner diameter of 4 mm, an outer diameter of 6 mm, and a length of 140 mm.

As a potting agent, Coronate C4
403 (manufactured by Nippon Polyurethane Industry Co., Ltd., diphenylmethane diisocyanate / polyethylene glycol prepolymer) and Nipporan N4223 (Nippon Polyurethane Industry Co., Ltd., castor oil derivative) were mixed at a weight ratio of 52:48 and defoamed. Potting agent (total weight 10
Using g), the injection operation was performed in the same manner as in Example 1, but the injection was completed in about 5 minutes. The viscosity of the potting agent at the end of the injection was 4,000 cps. Thereafter, the same operation as in Example 1 was performed to obtain a hollow fiber membrane module. Table 1 shows the result of the water pressure leak test of the obtained hollow fiber membrane module.

(Example 7) A hollow fiber membrane module was obtained in the same manner as in Example 1 except that the potting agent used in Example 5 was replaced with the same potting agent. The viscosity of the potting agent at the end of the injection was 7
It was 0000 cps. Table 1 shows the result of the water pressure leak test of the obtained hollow fiber membrane module.

Example 8 A hollow fiber membrane module was obtained in the same manner as in Example 5, except that the potting agent used in Example 6 was replaced with the same potting agent. At the end of the injection, the viscosity of the potting agent is 1
It was 00,000 cps. Table 1 shows the result of the water pressure leak test of the obtained hollow fiber membrane module.

[0031]

[Table 1]

[0032]

According to the present invention, an adhesive having a slow viscosity is used and its permeability due to its own weight is used. The operation of injecting a potting agent is easy, and a hollow material can be used without using a special device. The potting agent can be easily and reliably injected into the end of the yarn membrane. Further, the hollow fiber membrane module can be obtained with high productivity by the easy potting operation.

[Brief description of the drawings]

FIG. 1 is a process diagram of an example in a case where a potting agent is injected into an end of a hollow fiber membrane by its own weight.

FIG. 2 is a process diagram of an example in a case where a potting agent is injected into an end of a hollow fiber membrane by pressurization.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical housing 2 Hollow fiber membrane 3 Potting jig 4 Potting agent pot 5 Potting agent 6 Communication pipe 7 Pot lid 8 Pressure port

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kenji Watari 4-160 Sunadabashi, Higashi-ku, Nagoya City, Aichi Prefecture Inside Mitsubishi Rayon Co., Ltd. Product Development Laboratory (72) Inventor Masaru Ishihara 2-8 Akebono, Higashi-ku, Hiroshima City, Hiroshima Prefecture No.3 Inside Hiromite Co., Ltd.

Claims (2)

[Claims] 1. A hollow fiber membrane end to which a potting agent is injected when a potting agent is injected into ends of a plurality of hollow fiber membranes and the hollow fiber membrane ends are bonded and fixed to manufacture a hollow fiber membrane module. Setting the supply liquid level of the potting agent at a higher position where a liquid level difference occurs with the position, and injecting the potting agent into the end of the hollow fiber membrane by its own weight or further pressurization through a communication pipe; Adhesive fixing method of the end of the thread film. 2. The method according to claim 1, wherein a potting agent having a viscosity at the end of the injection of 50,000 cps or less is used as the potting agent.