JPS61192310A - Hollow yarn filter membrane module - Google Patents

Abstract

PURPOSE:To enhance filtering efficiency by uniformizing the flow of a raw solution to be filtered inside and outside hollow yarn bundles, by adhering and fixing a tubular body having a large number of fine pores provided to the side surface thereof in the central side of hollow yarn bundles along with said hollow yarn bundles. CONSTITUTION:A large number of hollow yarns 1 each sealed at one end thereof and opened at the other end thereof and a tubular body 2 sealed at one end thereof and opened at the other end thereof and having a large number of fine pores 4 provided to the side surface thereof are converged at the end parts thereof to adhere and fix said end parts by a resin 3. In this external pressure filtering type filter apparatus using a hollow yarn filter membrane module, a raw solution to be filtered is injected to the surfaces of the hollow yarn membranes through the fine pores 4 of the tubular body 2 to generate the fluctuation of the hollow yarn membranes and penetrated into the parts where the membranes are mutually contacted and, because the membranes function effectively and fine particles adhered to the surfaces of the membranes are washed off, filtering efficiency is enhanced.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a hollow fiber P-filtration membrane module, and more particularly, to a hollow fiber V-filtration membrane module for external pressure filtration with excellent filtration efficiency and cleaning efficiency. It is something.

[Prior art]

Hollow fiber filtration membrane modules have a high membrane packing density and can make filtration devices smaller and lighter, making them ideal for pure water production,
Widely used in food processing and other fields.

Typically, hollow fiber filtration membranes are made by bundling multiple hollow fibers, sealing both ends with resin, etc., and then cutting the ends to open both ends of the hollow fibers. In many cases, the filtered stock solution is forced into the opening of the hollow fiber, and the furnace filtrate is taken out to the outside.

This hollow fiber filtration membrane module has the effect of washing away dirt on the membrane surface caused by filtration with the flow of the filtration stock solution2.

In addition, when removing minute amounts of fine particles from extremely clear filtration stock solution, a so-called external pressure filtration method is used, in which the filtration stock solution is pressurized from the outside of the hollow fiber and the filtrate is taken out inside the hollow fiber. P-filtration type modules generally have hollow fibers with one end open, and in this case, it has been observed that as the number of hollow fibers increases, the amount of filtration due to the membrane area tends to decrease. . This is because the hollow fiber bundle is tightened (due to the pressure of the filtration stock solution), and therefore, the hollow fibers in the inside of the bundle are in close contact with the adjacent hollow fibers and cannot come into contact with the filtration stock solution, so only the hollow fibers on the outside of the bundle are This is because the conventional module contributes to filtration, and even if conventional modules were used for external pressure filtration, there was a drawback that the filtration efficiency would actually decrease.

Further, when cleaning the membrane module after filtration, the cleaning liquid flows outside the hollow fiber bundle, resulting in a problem of poor cleaning efficiency. In order to overcome this drawback, a module in which the hollow fiber bundle is divided into several small unit bundles has been proposed, but it takes time and effort to create a module, and it is difficult to say that the effect is sufficient.

Furthermore, a module having a water guide hole opening at the inside of one end of the hollow fiber bundle has been proposed, but the effect cannot be said to be sufficient when the length of the module becomes long.

[Purpose of the invention]

As a result of research aimed at obtaining a module suitable for an external pressure filtration method with good filtration efficiency, the present invention resulted in a module with good filtration efficiency by making the flow of the filtration solution uniform inside and outside the small raw silk bundle. The purpose is to provide an external pressure filtration type hollow fiber filtration membrane module suitable for removing minute amounts of fine particles from extremely clear filtration stock solutions.

[Structure of the invention]

The present invention provides a hollow fiber filtration membrane module in which one end of the hollow fiber is sealed and the other end is opened, in which a tubular body having a plurality of pores inside the hollow fiber bundle is opened at one end. This is a hollow fiber v membrane module characterized in that both ends are fixed to the hollow fiber bundle.

An embodiment of the hollow fiber filtration membrane module of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of the hollow fiber v membrane module of the present invention. This module consists of a large number of hollow fibers 1 with one end sealed and the other end open, a tubular body 2 having a plurality of pores 4 on the side surface with one end sealed and the other end open, and the hollow fibers. It is made of resin 3 with the ends of a tubular body converged and fixed by adhesive.

One end of the hollow fiber 1 is liquid-tightly sealed with polyurethane resin or polyurethane resin, and the other end is open for taking out the filtrate.

Materials for hollow fibers include polyacrylonitrile, polyvinyl alcohol, and sulfone. Liamide series, -
Polymers such as rietherimide, polyvinyl chloride, preolefin, and cellulose acetate, or ceramics are generally used.

The number of hollow fibers per module is appropriately determined depending on the outer diameter of the hollow fibers and the diameter of the module, but the greater the volume of the hollow fiber portion in the module volume, the greater the effect of the present invention.

Like the hollow fibers, the tubular body 2 has one end liquid-tightly sealed with Nyxy resin, polyurethane resin, etc., and the other end is open for press-fitting the filtered stock solution, and furthermore, pores 4 are provided throughout the tubular body 2. It is being Materials for the tubular body include polymers such as polyvinyl chloride, presulfone 1, polycarbonate, fluorocarbon resins, and silicone resins, stainless steel pipes, and ceramics, but are not particularly limited.

The inner diameter of the tubular body is not particularly limited, but if the inner diameter is too large, the number of hollow fibers per module will decrease, and if the inner diameter is too small, the pressure applied to the membrane surface will decrease relative to the operating pressure. It is preferable that the cross-sectional area of the opening of the tubular body is 0.5 to 2 times the cross-sectional area of the opening of the tubular body.

The pores provided in the tubular body are determined by the module diameter, the number of hollow fibers,
The pore area of the entire pores is preferably about 0.5 to 2 times the opening area of the tubular body, although it is determined as appropriate depending on the filtration capacity.

Also, even if multiple tubular bodies are used, there will be no difference. As the resin for adhesively fixing the ends of the hollow fiber and the tubular body, epoxy resin,
Resins such as polyurethane and unsaturated esters are preferred, but inorganic materials such as clay, talc, and silica may also be added to these resins.

FIG. 2 shows an example of a filtration device using the above-mentioned hollow fiber filtration membrane module, which includes a filtration stock solution press-in lower, a modineal container 5 having a concentrate outlet 8 and an air vent 9, and a cap 6 having a filtrate outlet 10. Become.

In the filtration process, υ stock solution is supplied to the filtration stock solution pressure inlet, passes through the pores of the tubular body and comes into contact with the hollow fiber membrane surface, and the ν filtrate that has passed through the hollow fibers is taken out from the fc filtrate outlet provided in the cap. [Effects of the Invention] As described above, in the present invention, by attaching a tubular body having pores within a hollow fiber bundle, the filtration stock solution is ejected onto the membrane surface.
This causes the membrane to fluctuate and penetrate into the areas where the membranes come into contact with each other, allowing the membrane to work effectively and at the same time washing away fine particles attached to the membrane surface, improving filtration efficiency and being extremely useful in practice. It is.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a hollow fiber filtration membrane module of the present invention, and FIG. 2 is a sectional view of a filtration device using the above module.

Claims (1)

[Claims] In a hollow fiber filtration membrane module in which one end of the hollow fibers is sealed and the other end is open, a tubular body having a plurality of pores on the side surface is located inside the hollow fiber bundle, and is located opposite to the open side of the hollow fibers. A hollow fiber filtration membrane module characterized in that the hollow fiber filtration membrane module is adhesively fixed together with the hollow fiber bundle with one end thereof being open.