JPH08173773A - Hollow fiber membrane module - Google Patents

Abstract

PURPOSE: To prevent miscellaneous bacteria from propagating in hollow fiber membranes and the hollow fiber membranes from clogging by wrapping the filter part of the hollow fiber membranes with antifungal fabric constituted of filament yarns in a module wherein the hollow fiber membranes are stored. CONSTITUTION: A hollow fiber membrane module used for cleaning municipal water, etc., is constituted by a method wherein the hollow fiber membranes 3 are wrapped with antifungal fabric 4 and stored in a module case 1 with a raw water inlet 6 and a cleaned water outlet 8 and then, an intermediate partition plate 5 is mounted and active carbon 2 is stored and a partition plate 7 of the raw water inlet side is mounted. The antifungal fabric 4 is constituted of filament yarns to provide its antifungal properties by constituting a part of or the whole fabric by a antifungal treatment or with filament yarns with antifungal properties. In addition, the antifungal fabric 4 has a shape which can wraps the whole part to be the filter part of the hollow fiber membranes 3 in the module case 1 and the end part thereof is pref. fixed on the fixed part of the hollow fiber membrane 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow fiber membrane module used for purification of tap water and the like.

[0002]

2. Description of the Related Art Conventionally, as a method of obtaining safer or tastier drinking water, a method of using activated carbon to remove sterilizing chlorine and odor dissolved in raw water has been known. Since it is difficult to remove contaminants, it is used in combination with a hollow fiber membrane capable of capturing contaminants. It is also known that the use of activated charcoal, which is coated with silver to impart antibacterial properties, suppresses the propagation of various bacteria trapped in the activated charcoal layer.

However, various bacteria that cannot be completely captured by the activated carbon layer or the antibacterial activated carbon layer are captured by the hollow fiber membrane, but the captured various bacteria are present in the state without a bactericide, and in some cases. Is proliferated by a small amount of dissolved organic matter, and there is a risk of causing clogging of the hollow fiber membrane and generation of odor.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hollow fiber membrane module which does not cause the propagation of various bacteria in the hollow fiber membrane and does not cause clogging of the hollow fiber membrane. .

[0005]

According to the present invention, in a module containing a hollow fiber membrane, an antibacterial cloth made of filament yarn is used to wrap the filtration portion of the hollow fiber membrane. In module.

The present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway sectional view of an example of a hollow fiber membrane module of the present invention, where 1 is a module case, 2 is activated carbon,
3 is a hollow fiber membrane, 4 is an antibacterial cloth, 5 is a middle partition plate, 6 is a raw water inlet port, 7 is a raw water inlet side partition plate, and 8 is a purified water outlet port.

The antibacterial cloth 4 in the present invention is composed of filament yarn, and the antibacterial property may be imparted to the cloth by subjecting the cloth to an antibacterial treatment, but the filament having the antibacterial property. It is preferable that antibacterial properties are imparted by constructing a part or the whole of the cloth with threads. Further, the filament yarn constituting the cloth or the filament yarn having an antibacterial property may be either a monofilament or a multifilament, or a processed filament yarn such as a crimped yarn of the multifilament.

As the filament yarn having antibacterial property,
Although not particularly limited, for example, an antibacterial agent or an antibacterial metal in which an antibacterial metal ion such as silver, copper or zinc is carried on an inorganic substance such as zeolite is kneaded into a polyester fiber, a polypropylene fiber, a polyamide fiber or the like. A filament yarn held by stuffing or coating, or a filament yarn held by coating on cellulose fiber, ceramics fiber, glass fiber or the like is used.

When the filament yarn having the antibacterial property is used, the cloth may be composed only of the filament yarn having the antibacterial property, and the filament which is mixed and twisted with other filaments has the antibacterial property as a whole. It may be composed of yarns, or may be woven or knitted with other filament yarns. By thus forming the fabric with the filament yarn, no fluff is generated from the fabric, and the hollow fiber membrane is not clogged with the fallen fluff. The fineness and the cloth density of the constituent filament yarns of the antibacterial cloth 4 are not particularly limited as long as the pressure loss does not occur during water passage.

When the filament yarn having the antibacterial property is used for a part of the cloth, the filament yarn having the antibacterial property needs to be present so that the cloth exhibits the antibacterial effect, and the antibacterial property of the filament yarn having the antibacterial property itself. Depending on the fabric structure and the like, for example, when a polyamide filament yarn is coated with silver antibacterial filament yarn as a part of the weft yarn of the woven fabric, when using a normal polyamide filament yarn as the warp and other weft yarns, 5m antibacterial filament yarn
By arranging them at intervals of m or less, the fabric is provided with an antibacterial property effective for suppressing the growth of various bacteria.

Further, the shape of the antibacterial cloth 4 may be any shape as long as it can cover the entire portion of the hollow fiber membrane 3 that serves as the filtration portion in the module case 1.
When the activated carbon 2 coexists in the module, the size of the activated carbon 2 should be such that the activated carbon 2 can be stored in the case 1 while the activated carbon 2 is stored. Good.

The antibacterial cloth 4 may be of a structure such that it is wrapped as close as possible to the portion of the hollow fiber membrane 3 which will be the filtration portion, and its end reaches the fixed portion of the hollow fiber membrane 3. It is desirable to fix the end portion of the antibacterial cloth 4 to the fixing portion of the hollow fiber membrane 3.

When activated carbon is coexisted in the module, the activated carbon 2 is the same activated carbon or antibacterial activated carbon that is usually used in a water purifier, and is not particularly limited.

[0014]

FIG. 1 shows an embodiment of the present invention. The embodiment shown in FIG. 1 shows an example of a hollow fiber membrane module that also uses activated carbon, in which a cylindrical case 1 having a raw water inlet 6 is provided.
After storing the hollow fiber membrane 3 by covering the entire portion of the hollow fiber membrane that serves as the filtration portion with a bag-shaped body of the antibacterial woven fabric 4 configured by using silver-plated nylon filaments as wefts,
A hollow fiber membrane module is constructed by mounting a middle partition plate 5, accommodating activated carbon 2, and mounting a raw water inflow side partition plate 7.

[0015]

In the hollow fiber membrane module of the present invention, since the filtration portion of the hollow fiber membrane is covered with the antibacterial cloth, the germs captured by the hollow fiber membrane do not propagate,
Further, even in a hollow fiber membrane module that also uses activated carbon or the like, it suppresses the propagation of various bacteria that pass without being captured by the layer of activated carbon or the like and are captured by the hollow fiber membrane, resulting in clogging of the hollow fiber membrane, odor, etc. It does not tend to come out and is useful as a hollow fiber membrane module in a purifier for tap water or the like.

[Brief description of drawings]

FIG. 1 is a partially cutaway cross-sectional view of an example of a hollow fiber membrane module of the present invention.

[Explanation of symbols]

 1 Module Case 2 Activated Carbon 3 Hollow Fiber Membrane 4 Antibacterial Cloth 5 Middle Partition 6 Raw Water Inlet 7 Raw Water Inflow Side Partition 8 Purified Water Outlet

Claims (2)

[Claims] 1. A hollow fiber membrane module, in which a hollow fiber membrane is housed in a module in which a filtration portion of the hollow fiber membrane is covered with an antibacterial cloth made of filament yarn. 2. The hollow fiber membrane module according to claim 1, wherein the antibacterial fabric is a fabric partially or wholly composed of filament yarn having antibacterial properties.