JPS6084106A - Preparation of spiral type fluid separating apparatus - Google Patents

Abstract

PURPOSE:To prevent the generation of leak, by folding a permeable membrane member, formed by connecting a pair of permselective membranes at the membrane surface sides thereof by a sticky tape, at the taping place. CONSTITUTION:A pair of asymmetric permselective membranes 1 are connected at the membrane surface sides thereof by a sticky tape 2. This permeable membrane member is folded at the place of the tape 2 so as to bring the sticky tape 2 to the inside to hold a stock solution flowline between folded segments. In the next step, one side of a material group E, which is formed by placing the folded permeable membrane member on a porous sheet like permeated liquid flowline material 4, is communicated with a permeated liquid collecting pipe 5 having a large number of small holes and adhesive 6 is applied to the residual sides. This material group E is wound around the permeated liquid collecting pipe 5 in a spiral form to adhere each part.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a spiral-type fluid separation system that performs separation of fluids using a selectively permeable membrane.

In general, in a spiral type fluid separation device, the open end of a membrane envelope made of a selectively permeable membrane with a permeate channel material arranged inside is communicated with a permeate collection tube, and the membrane envelope and the raw solution channel material are connected to each other as described above. It is wound in a spiral around the permeate collection tube.

Conventionally, as shown in FIG. 1, as a method of manufacturing such a fluid separation device, a selectively permeable membrane 11 having an asymmetrical structure is bent so that the membrane surface side is inward, and a stock solution channel material 1 is formed.
2, and place the selective permeable membrane 11 on the permeate channel material 13 to form a material group A. One side of the material group A is connected to the permeate collection l'14, and the remaining material is A method is used in which the material group A is spirally wound around the permeated liquid collection tube 14 after applying adhesive 15 on three sides of the tube. Transparent? Since the ll is forcibly bent using a jig or the like, the membrane surface at the bend may be damaged and the stock solution may leak to the permeate side, resulting in a decrease in separation performance. As a means to solve this problem, as shown in FIG.
There is a known method for preventing leakage by pasting the adhesive tape 6 on the permeable membrane 11 and the adhesive tape 1 at the bent portion.
Due to the difference in curvature or elastic modulus with 6, the p-permeable membrane 11 and the adhesive tape 16 are partially peeled off, forming a gap, and the undiluted solution enters the gap, resulting in membrane damage caused by bending. There was a drawback that leakage from the point 11' to the permeate side occurred. Another known method is to attach adhesive tape to the back side of the bent part of the selectively permeable membrane, but generally the back side of the membrane is lined with a porous sheet such as non-woven fabric or woven fabric. However, there was a problem in that the stock solution entered from the damaged part of the membrane, passed through the porous sheet, and leaked to the permeate side at the part where there was no tape.

The present invention has been made in order to solve the drawbacks of the prior art, and uses a permeable membrane member formed in a specific shape to produce a safe spiral-type fluid dispensing FiI device that does not cause leakage. The present invention provides a method.

That is, in the present invention, a permeable membrane member formed by connecting the membrane surface sides of a pair of asymmetric selective permeable membranes with an adhesive tape is bent at the tape location so that the vas deferens tape is on the inside, and the permeable membrane member is After sandwiching the material for the undiluted solution flow path and attaching it to the material for the permeate flow path, connect one side of the material group to the permeate collection pipe, apply adhesive to the remaining three sides, and then attach the material group to the permeate flow path material. This is a spiral-type fluid that is wound spirally around a permeate collection tube.

Hereinafter, examples of the present invention will be described based on the drawings.

FIG. 3 shows an example of a permeable membrane member used in the method for manufacturing a fluid separation device of the present invention, in which the membrane surface side of a pair of asymmetric selective permeable membranes 1 is supported by, for example, polyethylene, polypropylene, etc. They are connected with adhesive tape 2.

In the present invention, as shown in FIG. 4, the above-mentioned permeable membrane member is bent at the adhesive tape 2 so that the adhesive tape 2 extends inward, and a net-like plastic sheet, for example, is attached to the permeable membrane part. During the operation of sandwiching the undiluted solution channel material 3, the adhesive tape 2 is bent at the f, t, and i positions, so the above operation can be easily performed without using a jig or the like. Next, one side of the fifth material I￥E is connected to a permeated liquid collection pipe 5 having a plurality of small holes, and after applying an adhesive 6 such as epoxy or urethane to the remaining three sides. , the above material group E? 7. Wrap the filtrate material group E in a spiral around the circumference of the liquid tube 5 and adhere each part, and if necessary, cut both end surfaces of the material group E along the P-P' line and the Q-Q' line. A spiral-type fluid separator is obtained in which both end faces are completely sealed and KLKl does not leak to the permeate side - As described above, a single-leaf type fluid separator in which a set of materials is wound around a permeate collection pipe is obtained. Although the spiral has been described, the present invention can of course be implemented in the same manner with a double confection type spiral.

According to the present invention, the permeable+VS S material formed by connecting the membrane surface sides 1 of a pair of selectively permeable membranes with adhesive tape is bent at the tape location, so that the permeable membrane and the viscous T-tape are not connected to each other as in the conventional method. A safe spiral-type fluid separation device with no leakage can be obtained since no gap is formed between the membranes and the membrane is not damaged when the permeable V member is bent. Also, when bending the permeable membrane member, it is necessary to stretch the handle etc.≠:
*(i) It has the advantage that the work can be done easily and that the material for the raw solution flow path does not sink into the membrane surface and damage to the membrane surface can be prevented.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an example of a material group before winding in a conventional manufacturing method for a fluid separation device, FIG. 2 is an enlarged cross-sectional view of the bent portion of the selectively permeable membrane in FIG. The figure is a simplified diagram of an example of a permeable membrane member used in the manufacturing method of the fluid content 1iVi device of the present invention, FIG. 4 is an enlarged sectional view of the folded part of the permeable membrane member of FIG. It is an explanatory view showing an example before winding of a material group in a manufacturing method of fluid separation device 1τ of the invention. 1... Selective permeable membrane, 2... Adhesive tape, 3...
Material for raw solution flow path, 4... Moon for permeate flow path, 5... Permeated liquid collection pipe, 6... Adhesive, E... Material group Patent applicant Hijikata, representative of Nitto Electric Industries Co., Ltd. Three parts

Claims (1)

[Claims] A permeable membrane member formed by connecting the membrane surface sides of a pair of asymmetric selective permeable membranes with adhesive tape is bent at the tape point so that the adhesive tape is on the inside, and a stock solution channel material is sandwiched between the permeable membrane member. One side of the material group placed on the permeate flow path material is connected to the permeate collection pipe, and after applying adhesive to the three remaining sides, the material group is placed around the permeate collection pipe. A method of manufacturing a spiral type fluid separation device that is wound in a spiral shape.