JPH07256240A - Water purifier - Google Patents

Abstract

PURPOSE:To prevent pores from being choked due to adhesion of iron rust to tetrafluoroethylene thin film surface and prevent considerble change of the quantity of permeating water from the initial stage to the final stage. CONSTITUTION:A tetrafluoroethylene flat film 1 is sandwiched between a felt 2a and a Tetron supporting body 2b, a pressure-resistant container 3 is sealed and covered and put in a water purifier container 20. Iron rust which passes a roughly filtering cloth 9 is adsorbed and filtered by the felt 2a. Consequently, the iron rust which passes through the roughly filtering cloth 9 can be adsorbed and filtered by the felt, so that the filter thin film is prevented from being choked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is generally used for filtering water, hot water,
The present invention relates to a water purifier that is used for adsorption and removes and separates water, solids contained in hot water, and soluble organic substances.

[0002]

2. Description of the Related Art Conventional filters and water purifiers consisted of an activated carbon layer for adsorbing organic wastes, a resin for removing components such as dust, sand and iron rust, and a rough filter for pulp. By adsorbing and removing hypochlorous acid, a chlorine compound, etc., which has a reduced sterilization effect, an activated carbon layer,
In the residual water, various bacteria were prone to be proliferated, and there was a defect that various bacteria were mixed in at the time of water discharge. Therefore, a resin material such as polyester or polysulfone is formed into an extremely thin small-diameter tube (hereinafter referred to as a hollow fiber), and the entire surface thereof is 0.01 μm.
To form fine pores of several μm to secure a necessary and sufficient amount of water, hundreds are bundled and installed after the adsorption step of activated carbon, and permeate water from the outer circumference of the hollow fiber to the inside or from the inner circumference to the outer circumference. A proposal has been made to prevent filtered bacteria from leaking into the water discharge by filtering and separating most of the contaminants, which has been put to practical use.

[0003]

However, iron rust adheres particularly to the fine pores of the hollow fiber, and the pores are easily blocked,
Rust on iron pipes appears indefinitely every day, and when water is passed again after inspection, repair, and other water interruptions, the accumulated rust peels off and flows into the water purifier all at once. Or, the iron rust that has passed therethrough has a drawback that it blocks the hollow fiber filter and sometimes cannot be used for a very short period of time.

[0004]

Therefore, the present invention eliminates the drawbacks of the combined structure of a resin hollow fiber filter and activated carbon, improves the effective filtration life, and does not cause a significant difference in the amount of filtered water between old and new. In order to improve so, it has a roughing ability that responds to the adsorption life of activated carbon, and a felt and mat that can be roughed for a long time are overlaid as a unit, and iron rust etc. is preventively before passing through the flat filter membrane. It is intended to provide a water purifier that can be attached to felt or the like to prevent clogging of a flat filter membrane.

Another object of the present invention is to:
By providing a support on the secondary side of a porous membrane such as a tetrafluoroethylene resin to be a filtration membrane, the permeation pressure is large,
It is intended to provide a water purifier having a flat membrane capable of preventing the membrane from expanding and breaking, or exceeding the adhesive strength with the rough-sided support on the primary side and peeling off.

Still another object of the present invention is to use a tetrafluoroethylene resin for the flat film,
A water purifier with a flat membrane that can be expected to have non-adhesiveness and peeling property due to low friction, can prevent membrane filtration residue from adhering, can suppress the growth of various bacteria on the flat membrane, and can prevent clogging easily. It is provided.

That is, a porous membrane such as tetrafluoroethylene sandwiched with a polyester non-woven fabric is used as a filtration flat membrane, and the outer periphery of an activated carbon container having a sufficient pressure resistant structure with resin, metal, etc. is wrapped to form a filtration filter. Sealing the top and bottom of the activated carbon container to form a filtration adsorption cartridge, which is loaded into the water purifier body container and adsorbs the iron rust from iron pipes and tanks proactively to prevent iron rust from adhering to the flat membrane and blocking pores. The gist is that it was configured with the feature that it was possible to prevent.

[0008]

EXAMPLES A mechanism of a water purifier equipped with an adsorption filter cartridge composed of an activated carbon container and a flat filter membrane according to the present invention will be described according to examples. FIG. 1 is a cross-sectional view of a water purifier, in which a porous tetrafluoroethylene flat membrane 1 having a thickness of 85 μm and an average pore diameter of 3.0 μm is sandwiched between a polyester felt 2a having a thickness of 2 mm and a tetron support 2b, It has a cylindrical shape and encloses the outer side surface of the pressure resistant container 3 formed of a hard vinyl chloride resin cylinder. In the upper groove 4 and the lower groove 5, a stainless wire 6 is used for bundling and sealing, so that an object having a pore diameter of the tetrafluoroethylene flat membrane 1 or more does not pass through. The stepped lower portion 7 is opened to almost the entire surface, and water and hot water that have permeated through the bottom wire net 8 and the roughing filter cloth 9 are not limited to the local passages, and permeate from almost the entire cylindrical cross-sectional area. Will come. 10 is the grain size 8 ~
A lower activated carbon layer of 35 mesh and a capacity of 300 g, which is filled with a relatively large activated carbon for rough adsorption, and has a particle size of 40 to 60 mesh, a capacity of 700 g, and a packing density of 0.57 g / cm ³ for the purpose of fine adsorption filtration. In order to prevent mixing with the upper activated carbon layer 11, a partition filter cloth 12
Has been installed. The upper lid 13 has a plurality of upper filter cloths 15 disposed between the upper activated carbon layer 11 and the upper activated carbon layer 11, and the elasticity of the upper activated filter cloth 15 allows the filled activated carbon to float and prevent permeated water from passing through. The compressed state is always maintained. In the figure, the filtered water collects in the cylindrical groove 16, passes through the lid opening 17 and the circumferential opening 18, and in the figure, the tetrafluoroethylene flat membrane 1 and the felt 2a tetron support 2 which are in close contact with the pressure resistant container 3. -2 and the pressure-resistant container 3, and is discharged to the outside from the water purification passage 21 and the discharge metal fitting 22 that form a space around the adsorption filter cartridge 19 and the water purifier container 20 having the above-described configuration. The seal ring (bottom) 23 seals the inflow water, and the seal ring (top) 24 seals the water purifier container 2
0 and the clean water container lid 25 are sealed. Further, the tightening knob 26 is screwed into the upper screw portion 28 of the shaft 27, and the seal ring (bottom) 23 and the seal ring (top) 24
Are crimped and sealed at the same time. The filtration adsorption port 29 is a passage port to the adsorption filter cartridge 19.

Usually, the microfiltration and ultrafiltration filters are
When it becomes blocked, backwashing is performed to recover the filtration flow rate. However, it is difficult to install a backwashing mechanism for households, especially large ones. It is either disposable or tries to filter iron rust with a rough mat that is clogged, the filtration area cannot be made large and the filtration flow rate decreases immediately, but it is an eye that filters iron rust of the same area as the flat membrane. By installing the felt 2a filled with iron, iron rust does not penetrate to the tetrafluoroethylene flat film 1.

Further, in the case of a structure in which the pores of the membrane are laminated in multiple layers, iron rust, etc. which is supposed to pass through the pores of the surface and be filtered by the smaller pores in the backwash, is backwashed. Also, since it is difficult to come out of the membrane, it is necessary to install a separate filter adsorbent that adsorbs in advance, especially in the case where the pores have a laminated structure.

[0011]

As described above, according to the present invention, a thin film of tetrafluoroethylene resin or the like is sandwiched between felts such as polyester and polypropylene or a mat-like support to form a flat film, and a pressure resistant container of activated carbon is sealed and wrapped. With the structure, iron rust or the like can be preventively attached to the felt-like support, and the object to be filtered can reach the thin film and can be prevented from adhering to the surface to block the pores.

Further, according to the present invention, since the filtration thin film is formed of a low friction material such as tetrafluoroethylene resin, the film surface has non-adhesiveness and peeling property, so that strong adhesion and iron rust Etc. has the practical benefit of not covering the surface and closing the pores.

Furthermore, according to the present invention, a flat film is formed by combining a flat film and a felt such as polyester for adsorbing iron rust. It has a practical advantage that the volume of the filter part can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view illustrating the structure of a water purifier.

FIG. 2 is a schematic sectional view illustrating a structure.

FIG. 3 is a layered structure diagram illustrating a flat sheet membrane filter.

[Explanation of symbols]

 1 Tetrafluoroethylene flat membrane 2a Felt 2b Tetoron support 3 Pressure vessel 4 Upper groove 5 Lower groove 6 Wire 7 Stepped lower 8 Bottom wire mesh 9 Rough filter cloth 10 Lower activated carbon layer 11 Upper activated carbon layer 12 Partition filter cloth 13 Upper Lid 14 Upper wire mesh 15 Upper filter cloth 16 Circular groove 17 Lid opening 18 Circular opening 19 Adsorption filter cartridge 20 Water purifier container 21 Water purification passage 22 Discharge metal fitting 23 Seal ring (bottom) 24 Seal ring (top) 25 Water purification container lid 26 Tightening knob 27 Shaft 28 Upper thread 29 Filter suction port

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location C02F 1/44 A 9153-4D

Claims (4)

[Claims] 1. A porous membrane made of a material such as tetrafluoroethylene resin or polysulfone is sandwiched between a plurality of woven or non-woven fabric supports such as polyester, polypropylene, tetron, acrylic, and glass fiber without any adhesion. It is formed into a flat membrane, and it is formed into a cylindrical shape that encloses the entire outer circumference of the cylindrical pressure-resistant activated carbon container to be loaded into the water purifier. By making the flat membrane and the upper and lower parts of the pressure-resistant container into a sealed structure, adhesion of iron rust etc. A water purifier with a flat filter membrane that can improve the filtration life by roughly picking up and adsorbing substances that are strong and that easily close the pores of the porous membrane with the backing and backing support. 2. A porous membrane such as tetrafluoroethylene resin,
The water purifier according to claim 1, wherein a flat membrane integrated by woven cloth or non-woven cloth made of polypropylene or the like is sandwiched as a support and welded. 3. To prevent intrusion of a clogging material into a flat membrane such as tetrafluoroethylene resin, which has a thickness of 20 μm or more and pores are laminated and multiplexed so that a filtered material is easily deposited and trapped in the middle of the membrane. The water purifier according to claim 1, wherein the water purifier has a filter flat membrane in which felt or mat such as polyester capable of being adhered is adhered or not adhered. 4. The water purifier according to claim 1, wherein iron rust and the like are less likely to adhere by forming a flat film of tetrafluoroethylene resin having low friction, non-adhesiveness, and peelability.