JPH0999222A - Hollow fiber membrane module unit and filtering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a hollow fiber membrane module unit easy in the change of membrane surface area and maintenance working by inserting each hollow fiber embrane module element in a guide groove formed in the main body casing to fix to the main body casting. SOLUTION: The hollow fiber membrane module unit is constituted so as to arrange plural hollow fiber membrane module element 4 formed by arraying the hollow fiber membrane in sheet-like form and fixing one end of the hollow fiber membrane in opening stage. And each hollow fiber membrane module element 4 is inserted in the guide groove 11 formed in the main body casing 5 to respectively fix to the main body casing 5. A bottom plate to fix the hollow fiber membrane module element 4 to a prescribed position is fitted in the guide groove 11. As the hollow fiber membrane for the hollow fiber membrane module element 4, a polyolefin based material such as polyethylene, polypropylene having high strength and elongation is preferably used from the view point of easiness of working into the sheet like from and durability against air scrubbing cleaning.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a hollow fiber membrane module unit and a filtration device using the hollow fiber membrane module unit.

[0002]

2. Description of the Related Art Conventionally, hollow fiber membrane modules have been used not only for precision filtration such as purification of tap water and purification of air, but also for higher-order treatment and solid-liquid separation in various highly polluted wastewater treatments. And, in the hollow fiber membrane module used in the field of this highly polluted water treatment, in addition to the cylindrical type that bundles the hollow fiber membranes that are frequently used in the field of conventional microfiltration, the hollow fiber membrane becomes a sheet shape. A sheet-shaped type hollow fiber membrane module is used in which the hollow fiber membranes are arranged in such a manner that one end of the hollow fiber membrane is fixed in an open state. This sheet-shaped type hollow fiber membrane module can easily recover the membrane function by air scrubbing cleaning.

In addition, when treating a large amount of raw water in use, it is necessary to increase the membrane area, but if the membrane area of the hollow fiber membrane module alone is increased, its production and handling are difficult. In addition, since it is difficult to uniformly perform air scrubbing cleaning, it has been adopted to use a single hollow fiber membrane module as an element and use it as a hollow fiber membrane module unit in which a plurality of hollow fiber membrane module elements are arranged.

However, when arranging a plurality of hollow fiber membrane module elements in a required membrane area, each element is connected and fixed to form a unit, so that the work is complicated and the element installation space is reduced to reduce the module unit. There is also a limit to increasing the volumetric efficiency, and it is not possible to take out the element from the hollow fiber membrane module unit in use, so it is necessary to remove and dismantle the hollow fiber membrane module unit after every maintenance. It was

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a hollow fiber membrane module unit in which the membrane area can be easily changed and maintenance work can be easily performed. Another object of the present invention is to provide a hollow fiber membrane module unit. An object of the present invention is to provide a filtration device using a hollow fiber membrane module unit.

[0006]

According to the present invention, a hollow fiber membrane module unit is provided in which hollow fiber membranes are arranged in a sheet form, and a plurality of hollow fiber membrane module elements in which one end of the hollow fiber membrane is fixed in an open state are arranged. In the hollow fiber membrane module unit, each hollow fiber membrane module element is fitted into a guide groove provided in the main body casing and fixed to the main body casing,

Also, there is provided a filtration device including the hollow fiber membrane module unit and an air diffuser.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a perspective view of an example of a hollow fiber membrane module element, and FIG. 2 shows a perspective view of an example of a hollow fiber membrane module unit of the present invention. In FIG. 1, the sheet-shaped hollow fiber membrane 1 is made up of a supporting member 3 made of a fixing resin 2.
The hollow fiber membrane module element 4 is formed by fixing one end of the hollow fiber membrane 1 inside the support member 3 in an open state. In FIG. 2, a plurality of hollow fiber membrane module elements 4 are fixed to a main body casing 5 to form a hollow fiber membrane module unit 6.

The hollow fiber membranes of the hollow fiber membrane module element 4 are, for example, cellulose type, polyolefin type,
Hollow fiber membranes made of various materials such as polyvinyl alcohol, polymethylmethacrylate, and polysulfone are used, but polyethylene with high strength and elongation is easy to process into a sheet and durable against air scrubbing. Hollow fiber membranes made of polyolefin materials such as polypropylene are preferably used. The hollow fiber membrane is
The pore diameter, the film thickness, the outer diameter, etc. are not particularly limited as long as they have a membrane filtration function.

The hollow fiber membrane is used in a state where the hollow fiber membranes are arranged in a sheet form, and the sheet-like material in which the hollow fiber membranes are arranged is formed by arranging the hollow fiber membranes as wefts of a woven fabric or a knitted fabric, Moreover, a woven or knitted fabric having a hollow fiber membrane array is preferably used as the sheet-shaped article having a hollow fiber membrane array. The sheet-shaped hollow fiber membrane obtained by arranging the hollow fiber membranes in a sheet shape may be a single sheet or may be used as a laminated body in which a plurality of sheets are laminated. When it is used as a laminated body, the upper limit of the number of laminated layers is about 5, although it depends on the thickness of the hollow fiber membranes and the number of arranged fibers.

Further, the supporting member 3 of the hollow fiber membrane module element 4 functions as a member for supporting and fixing the sheet-shaped hollow fiber membrane 1 to form the entire hollow fiber membrane module element. In addition to having an open end of the fiber membrane, it has a permeate liquid flow path, and a flow path port 7 is provided at the end of the support member 3. The support member 3 is made of a material having mechanical strength and durability, and for example, polycarbonate, polysulfone, polypropylene, acrylic resin, ABS resin, vinyl chloride resin or the like is used as the material.

The support member 3 is preferably in the form of a plate having a thickness of 30 mm or less, preferably 15 mm or less. In the case of a plate-like member, the open end of the hollow fiber membrane and the permeate flow channel are secured. The width of the sheet-shaped hollow fiber membrane 1 is 100 to 20
There is no particular limitation on the width and length of the support member 3 as long as the sheet width of 00 mm can be fixed.

The sheet-shaped hollow fiber membrane 1 and the supporting member 3 are fixed by the fixing resin 2 at the slit portion of the supporting member 3,
Moreover, the slit portion is sealed by the fixing resin 2. As the fixing resin 2, epoxy resin, unsaturated polyester resin, polyurethane resin or the like is used.

The hollow fiber membrane module unit is constructed by arranging a plurality of hollow fiber membrane module elements. In the present invention, as shown in FIG. The hollow fiber membrane module unit 6 is configured by being inserted into the provided guide groove 11 and fixed to the main body casing 5, respectively. FIG.
In the above, the guide groove 11 is provided with a bottom plate for fixing the hollow fiber membrane module element 4 at a predetermined position, but the shape of the guide groove and the position fixing means are not particularly limited.

In the hollow fiber membrane module unit 6,
The permeated liquid flow passage port 7 of each hollow fiber membrane module element 4 fixed to the main casing 5 is connected to a suction pipe 9 by a pipe 8 as shown in FIG. Although the liquid is collected and discharged, it is preferable that the permeated liquid can be allowed to flow and be blocked, and that the permeated liquid can be easily facilitated. The insertion port of the pipe 8 at the connecting portion 10 of the suction pipe 9 has a detachable fitting structure, and A check valve is provided in the connecting portion 10.

The hollow fiber membrane module unit of the present invention comprises:
Not only can a desired number of hollow fiber membrane module elements be easily inserted and arranged, but also the hollow fiber membrane module elements can be easily taken out, and when the permeated liquid can be passed and blocked, It is possible to increase or decrease or replace the hollow fiber membrane module element when the fiber membrane module unit is in use.

The hollow fiber membrane module unit of the present invention is also placed in a closed container and used for pressure filtration.
It is preferably used for suction filtration in which it is disposed in an activated sludge tank or a sedimentation tank and the treated water that has permeated the hollow fiber membrane is sucked and discharged.
In particular, in so-called intermittent suction filtration in which suction is temporarily stopped, there is no infiltration of film surface deposits into the film surface, and it is effectively used.

The filtration device of the present invention comprises the hollow fiber membrane module unit constructed as described above and an air diffuser. The air diffuser not only gives an aeration action by releasing air, but also recovers the membrane function by air scrubbing and cleaning the hollow fiber membranes of each element in the hollow fiber membrane module unit. By combining the above, the membrane function of the hollow fiber membrane of each element is effectively exhibited.

The air diffuser has an air discharge hole,
There are no particular restrictions on the shape, number, arrangement, etc. of the holes. Further, an arbitrary number of air diffusers are installed and arranged below the hollow fiber membrane module unit so that air hits the hollow fiber membrane surface of each hollow fiber membrane module element.

The air diffuser is made of any material, such as polycarbonate, polysulfone, polyethylene,
Synthetic resin such as polypropylene, acrylic resin, ABS resin, vinyl chloride resin, metal, wood or the like is used, but it is preferable to use synthetic resin from the viewpoints of corrosion resistance, easiness of processing and light weight.

FIG. 5 shows a schematic diagram of the configuration of an example in which the filtration device of the present invention is installed in an activated sludge tank. In the activated sludge tank 17 containing the water to be treated, the hollow fiber membrane module unit 6 and the air diffuser 1
8 is installed, and the air from the blower 14 is diffuser 18
The permeated liquid which is discharged from the filter unit and filtered and separated by the hollow fiber membrane module unit 6 is discharged as treated water 13 by the vacuum pump 12 through the suction pipe 9. In the suction system,
A vacuum gauge 15 and a suction pressure adjusting valve 16 are provided. This suction filtration can be performed without stirring the water to be treated, but can also be performed with stirring or under convection.

[0022]

In the hollow fiber membrane module unit of the present invention, since the hollow fiber membrane module element can be easily inserted and arranged, a hollow fiber membrane module unit having a desired membrane area can be easily obtained. Not only
The filtration device equipped with the hollow fiber membrane module unit of the present invention makes it easy to take out the hollow fiber membrane module element, and when permeation and circulation of the permeated liquid are possible, the hollow fiber membrane module unit in use is removed. The hollow fiber membrane module element can be taken out or the number of hollow fiber membrane module elements can be increased, and the maintenance work of the hollow fiber membrane module unit during the filtration operation is facilitated.

[Brief description of drawings]

FIG. 1 is a perspective view of an example of a hollow fiber membrane module element.

FIG. 2 shows a perspective view of an example of a hollow fiber membrane module unit of the present invention.

FIG. 3 shows a partially enlarged view of an example of the hollow fiber membrane module unit of the present invention.

FIG. 4 is a schematic view of the connection of the hollow fiber membrane module unit of the present invention with a suction pipe.

FIG. 5 is a schematic configuration diagram of an example in which the filtration device of the present invention is installed in an activated sludge tank.

[Explanation of symbols]

 1 Sheet-shaped hollow fiber membrane 2 Fixing resin 3 Support member 4 Hollow fiber membrane module element 5 Main body casing 6 Hollow fiber membrane module unit 7 Permeate flow passage port 8 Piping 9 Suction pipe 10 Connection part 11 Guide groove 12 Vacuum pump 13 Treated water 14 Blower 15 Vacuum gauge 16 Suction pressure control valve 17 Activated sludge tank 18 Air diffuser

Claims (2)

[Claims] 1. A hollow fiber membrane module unit in which a plurality of hollow fiber membrane module elements in which hollow fiber membranes are arranged in a sheet shape and one end of the hollow fiber membrane is fixed in an open state are arranged. Is inserted into a guide groove provided in the main body casing and fixed to the main body casing, respectively. 2. A filtration device comprising the hollow fiber membrane module unit according to claim 1 and an air diffuser.