JPS6365361B2 - - Google Patents

Description

[Detailed description of the invention] Hollow fiber filtration membranes (hereinafter referred to as hollow fibers) have a high membrane packing density and can make filtration equipment smaller and lighter, so they are widely used in pure water production, food processing, and other fields. It is used.

Normally, the undiluted liquid is forced into the inside of the hollow fiber, and the filtrated liquid is often taken out to the outside, but when removing trace amounts of fine particles from an extremely clear undiluted solution, the undiluted liquid is forced into the hollow fiber from the outside and inside the hollow fiber. The so-called external pressure method in which the filtrate is taken out is more advantageous because it can perform filtration more efficiently.

Normally, when carrying out the procedure using this method,
After bundling multiple hollow fibers and binding and sealing both ends with resin etc., cut off at least one end of the hollow fibers and leave the ends of the hollow fibers open.The module is placed in a cylindrical container and the inside and outside of the hollow fibers are sealed. The filtrate is attached so as to be liquid-tight, and the filtrate is forced into the outside of the hollow fiber from the side of the container, and the filtrate seeped into the inside of the hollow fiber is taken out from the open end of the hollow fiber for filtration.

In such a method, the excessive stock solution tightens the hollow fiber bundle due to its pressure, and as a result, the hollow fibers in the inside of the bundle are in close contact with adjacent hollow fibers and cannot contact the superstock solution, so that only the hollow fibers on the outside of the bundle are The drawback was that the efficiency decreased.

In order to improve these drawbacks, an overheater as shown in FIG. 1 was devised.

FIG. 1 schematically shows a cross section of the overpass device of the present invention. One end of the hollow fiber bundle 2 is sealed and bound by a resin 3, and the resin is provided with a predetermined number of through holes 5 that open to the inside of the hollow fiber bundle 2. The other end of the hollow fiber is left open with resin 6.
The module thus constructed is attached to the housing 4 so that the inside and outside of the hollow fibers are liquid-tight. A raw liquid pressure inlet 1 , an excess liquid outlet 7 and an air exhaust valve 8 are attached to the housing 4 .

When carrying out filtration with the filtration device constructed in this way, the stock solution is supplied from the inlet 1 to the inside of the hollow fiber bundle 2 through the through hole 5. Therefore, the hollow fiber bundle 2 is not tightened from the outside, but rather is spread out from the inside, so that adjacent hollow fibers do not come into close contact with each other and come into contact with the stock solution, so that the hollow fibers forming the bundle are Since all of the components contribute to the surplus without any wastage, the efficiency of the surplus can be dramatically improved. The filtrate that has seeped into the hollow fiber is taken out from the liquid outlet 7.

The through holes 5 are also useful when introducing air or the like to create bubbles inside the container 4 and vibrating the hollow fibers, if necessary.

In a device having such a structure, it is important to arrange the through holes 5 at regular predetermined positions inside the hollow fiber bundle 2, but this is an extremely difficult task and requires a lot of time and effort. It was hot.

As a result of intensive studies, the present inventors have completed the present invention, which facilitates the manufacture of such modules.

The present invention provides a predetermined number of pores at predetermined positions in a bottom plate of a container consisting of a peripheral wall and a bottom plate, and a rod or tube having the same cross-sectional shape as the pores and a non-adhesive surface. Insert one end of the hollow fiber bundle consisting of a predetermined number of hollow fibers into the container from the opening of the container, and fill the container with crosslinkable resin to a position below the top end without covering the rod or tube material. After cross-linking and curing the resin and binding and sealing the hollow fibers, the rod or tube is removed from the bottom side of the container to form a through hole, and then the cured cross-linkable resin molding is placed together with the bottom plate of the container. Manufacture of a hollow fiber membrane module characterized in that the hollow fibers are pulled out from the peripheral wall, the other end of the hollow fiber bundle is bound with a crosslinking resin, and then the end is cut to leave the hollow fibers in an open state. It's a method.

The present invention will be explained in detail below with reference to Examples.

As hollow fiber, inner diameter 1.0mm, outer diameter 1.6mm, length 1300
800 polysulfone hollow fibers with an initial water permeability of 1200 l/m ² hr atm were used.

The container is made of acrylic resin with an inner diameter of 74 as shown in Figure 2.
Peripheral wall part 9 of a cylindrical container with an outer diameter of 78 mm and a height of 30 mm.
Pores 10 with a diameter of 3 mm are radially arranged 9 in the bottom plate 12 of the
An individual rod 11 made of Teflon (tetrafluoroethylene resin, trade name of DuPont) and having a diameter of 3 mm was inserted into the pore. The container is not limited to a cylindrical shape, but can be box-shaped or other shapes as necessary. Alternatively, the bottom surface may be attached to one end of the housing 4 shown in FIG. 1 and used as a container. Further, the rod material may be a tube material, and the material is not limited to Teflon, but polyolefins having a non-adhesive surface or other materials subjected to mold release treatment can be used.

After trimming one end of the hollow fiber bundle, it was inserted uniformly into a container as shown in FIG. Since the position of the through hole 5 is already defined by the rod 11, the hollow fiber bundle 2
It was extremely easy to insert the tube evenly. After insertion, epoxy resin is filled into the container from the opening of the container, cross-linked and cured, and the hollow fiber bundle is bound and sealed.
The rod 11 was removed from the bottom side of the container (lower side in the drawing) to form a through hole 5. At this time, since the holes penetrate through the resin layer, when filling the container with epoxy resin, it is important that the resin does not cover the rod 11 to a position below the upper end of the rod 11.

The other end of the hollow fiber bundle was trimmed to a predetermined length, and with the hollow fibers open, the hollow fibers were shaped into a cylinder with a diameter of 78 mm and a height of approximately 30 mm using epoxy resin, and then bound together using an epoxy resin. The total length of the module is 1060mm.

The module manufactured in this way has an inner diameter of 80
It was mounted inside a vinyl chloride housing with an outer diameter of 88 mm, and both ends were glued to the housing with epoxy resin to make it liquid-tight.

A raw liquid pressure inlet, a filtrate outlet, and an air discharge valve are attached to both ends of the housing configured in this way.
A superconductor having a configuration similar to that shown in FIG. 1 was manufactured.

It was observed that such a filter had through holes in a predetermined arrangement and hollow fibers were uniformly distributed. As described above, according to the method of the present invention, it is possible to easily obtain a hollow fiber membrane module in which through-holes and hollow fibers, which serve as inlets for filtration stock solution, are evenly distributed, using an extremely simple mold, and This method is useful as a method for producing hollow fiber membrane modules because no unnecessary pulling force is applied to the hollow fibers when the rod or tube material is removed or demolded after resin molding.

[Brief explanation of drawings]

FIG. 1 is a diagram schematically showing a cross section of a superconductor according to the present invention. In the figure, 1...excess stock solution inlet, 2...hollow fiber bundle, 3...
Crosslinkable resin for binding and sealing the hollow fiber, 4...Housing, 5...Through hole, 6...Crosslinking resin for binding and sealing the opening end of the hollow fiber, 7...Excess stock solution outlet, 8...Air discharge valve, Figure 2 is a drawing schematically showing the acrylic resin container used in this example, where A is a side sectional view and B is a bottom view. In the figure, 9...peripheral wall part, 10...pore, 11...pore 10
A Teflon round rod inserted into the 12 bottom plate. Figure 3 shows a round rod inserted into the pore of an acrylic resin container, one end of the hollow fiber inserted uniformly into the container, and the crosslinkable resin filled into the container. FIG. 3 is a diagram schematically showing the state and the state in which the round rod is removed after crosslinking and curing to form a through hole.

Claims (1)

[Claims] 1. A pore is provided in the bottom plate of a container consisting of a peripheral wall and a bottom plate, and a plastic rod or tube having the same cross-sectional shape as the pore and a non-adhesive surface is inserted into the pore to form a hollow fiber. One end of the bundle is inserted into the container through the opening of the container, and the container is filled with crosslinkable resin to a position below the upper end of the rod or tube material, and the resin is crosslinked and cured to bind and seal the hollow fibers. After stopping, the rod or tube is removed from the bottom side of the container to form a through hole, and then the cured crosslinkable resin molded product is removed from the peripheral wall along with the bottom plate of the container, while the hollow fiber bundle is removed from the bottom of the container. A method for manufacturing a hollow fiber membrane module, characterized in that the other end is bound with a crosslinkable resin and then the end is cut to leave the hollow fiber in an open state.