JPH07251166A - Water purifier - Google Patents

Abstract

PURPOSE:To increase the contact area of permeated water and to improve the packing density by using a pressure cylindrical vessel as a cartridge to be loaded in the water purifier, packing a granular activated carbon having a specified grain size at a specified density and compressing the cartridge from the upper and/or lower parts to increase the internal pressure of the cartridge. CONSTITUTION:A flat filter plate 1 consisting of a porous fluororesin is stuck to a substrate 2 consisting of nonwoven fabric and formed into the shape of an envelop to wrap the outer side face of a pressure cylinder 3. The lower activated-carbon bed 10 is packed with the activated carbon for rough adsorption having a relatively large grain size, and a partition filter cloth 12 is set between the bed 10 and the upper activated-carbon bed 11 for precision adsorption. An upper wire net 14 is interposed between an upper lid 13 and the upper activated-carbon bed 11, plural upper filter cloths 15 are arranged, and the bed is compressed at all times by the elasticity of the cloths. A 30 to 70-mesh main adsorption activated-carbon bed is packed in the cylinder 3 at the packing density of 0.4 to 0.7g/cm<3>.

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. However, by adsorbing and removing hypochlorous acid, an organic chlorine compound, etc., which have a low sterilization effect, various bacteria are easily proliferated in the activated carbon layer and the residual water, and there is a drawback that various bacteria are mixed at the time of water discharge. Therefore, a resin material such as polyester or polysulfone is molded into an extremely thin small-diameter tube (hereinafter referred to as a hollow fiber), and 0.0 is formed on the entire surface thereof.
In order to form fine pores of 1 μm to several μm and to secure a necessary and sufficient amount of filtered water, hundreds of them are bundled and installed after the adsorption step of activated carbon, and water is passed from the outer circumference of the hollow fiber to the inner part or from the inner part to the outer part. It has been proposed that it is configured to obtain filtered water, most of the bacteria are separated by filtration, and that the bacteria are prevented from leaking into the water discharge, and are widely put to practical use.

[0003]

However, since the proportion of the hollow fiber filtration portion in the water purifier container is large,
Due to the constitution, the volume occupied by activated carbon becomes small, and as a result, the time until breakthrough is shortened, the replacement frequency is increased, and the running cost is sometimes increased.

[0004]

Therefore, the present invention aims to eliminate the drawbacks of the combined structure of the resin hollow fiber filter and the activated carbon and to maximize the adsorption function of the activated carbon. Improved lifespan and new and old filtration,
In order to improve the remarkable difference in adsorption characteristics, a fine porous film such as fluorine resin and polysulfone is used for polypropylene,
Woven or non-woven fabric such as Tetoron, acrylic or glass is used as a support to cover by adhesion, welding, etc. to form a flat membrane, which is formed into a cylindrical shape that encloses the entire outer circumference of a cylindrical pressure-resistant activated carbon container to be loaded into the water purifier. By providing a filter membrane structure in which the upper and lower parts in contact with a container are sealed, a water purifier capable of minimizing the space for installing a filter medium is provided.

Another object of the present invention is to:
For the purpose of improving the contact area of the permeated water and the packing density, reducing the activated carbon particle size increases the filtration pressure loss, and even if the internal pressure rise close to the primary water pressure is seen, damage to the container itself can be seen. Not a water purifier.

Further, another object of the present invention is to fill the space with no gap and keep the compressed state at all times so as not to reduce the chance of the activated carbon floating and contacting with water.
A water purifier that can improve adsorption efficiency.

Still another object of the present invention is to provide a particle size of 30-70 mesh and a packing density of 0.4-.
The present invention provides a water purifier capable of increasing the contact area with water to 0.7% / cm ³ and improving the adsorption efficiency.

Still another object of the present invention is to allow the activated carbon layer to completely pass through the side surface of the activated carbon layer filled in the cylindrical container without directly permeating to the outside of the container, and to discharge the activated carbon layer only from the upper portion of the container. By doing so, a water purifier that can complete the adsorption process is provided.

Still another object of the present invention is to make the bottom part of the cylindrical activated carbon container to be almost entirely open so that the permeated water does not form a local route and is locally adsorbed and deteriorated. It is intended to provide a water purifier capable of preventing formation.

Still another object of the present invention is to provide a water purifier capable of easily removing iron rust by using a woven fabric or a non-woven fabric which is a support for a flat membrane, to which iron rust easily adheres. It is provided.

Still another object of the present invention is to prevent peeling even by permeation pressure exceeding the adhesive strength by using a flat membrane as a filtration membrane on the inner surface and a support on the outer surface. A water purifier having a filtration membrane is provided.

[0012]

[Function] That is, a filter formed by forming an activated carbon container having a large open bottom with a sufficient pressure resistant structure of resin, metal, etc., and adhering a porous membrane such as Teflon to the surface of a non-woven fabric or the like on the outer periphery thereof to form a cylindrical shape. By covering and fixing and covering the top and bottom, the space occupied by the filter part can be minimized and the amount of activated carbon filled can be increased.
The gist of the present invention is that the packed activated carbon has a feature that the packing density is improved, the contact area of the permeated water is increased, and the adsorption efficiency of the object can be improved by reducing the particle size of the packed activated carbon.

[0013]

EXAMPLE An adsorption filter cartridge and a water purifier mechanism constituted by an activated carbon container and a filtration membrane according to the present invention will be described according to an example. FIG. 1 is a cross-sectional view of a water purifier, in which a filter flat membrane 1 made of a porous fluorine resin having an average pore diameter of 0.5 μm is attached to a support 2 made of polypropylene non-woven fabric to form an envelope. It 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, the stainless wire 6
The binding and sealing structure is used so that an object having a pore diameter larger than that of the flat filter membrane 1 does not pass through. The stepped lower portion 7 is almost entirely opened, and the water and hot water that permeate the bottom wire netting 8 and the roughing filter cloth 9 are not limited to the local passages, but permeate from almost the entire cylindrical cross-sectional area. It will be. 10 is the grain size 8 to 3
It is a lower activated carbon layer of 5 mesh and a capacity of 300 g, and is filled with activated carbon of a relatively large particle size for rough adsorption, and a particle size of 40 to 60 mesh and a capacity of 700 g for the purpose of precision adsorption.
Upper activated carbon layer 11 having a packing density of 0.57 g / cm ³
In order to prevent it from mixing with each other, partition filter cloth 1
2 are 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. Filtrated water collects in the cylindrical groove 16, passes through the lid opening 17 and the cylindrical opening 18, and in the figure, the flat filter membrane 1 in close contact with the pressure resistant container 3, the gap between the support 2 and the pressure resistant container 3. Adsorption filter cartridge 1 with the above configuration
9, a water purification passage 21 that forms a space around the water purifier container 20,
It is discharged from the discharge fitting 22 to the outside. The seal ring (bottom) 23 seals the inflow water with the seal ring (top) 2
Reference numeral 4 measures the sealing between the water purifier container 20 and the water purifier container lid 25. Further, the tightening knob 26 is screwed into the upper threaded portion 28 of the shaft 27 to simultaneously crimp and seal the seal ring (lower) 23 and the seal ring (upper) 24. 29
Is a connection fitting that serves as a water inlet. Lifting tool 3
0 is formed in a semi-circular shape, and is an adsorption filter cartridge 1
This facilitates the withdrawal of 9.

FIG. 3 is a table summarizing the transition of discharge water assuming a normal usage amount of one year and a half for total trihalomethane removal in this example. As shown in the table, the total trihalomethanes of 4 kinds exceeded 10,000 liters and the removal rate of 98% or more could be maintained.

[0015]

As described above, according to the present invention, the porous resin film is a woven fabric such as polypropylene, a non-woven fabric is coated, a flat film is formed into a cylindrical shape, and the outer circumference of a cylindrical pressure resistant container of activated carbon is wrapped, Further, by sealing the top and bottom, there is a practical advantage that the installation space of the permeation filtration membrane can be minimized. Further, according to the present invention, a pressure-resistant cylindrical container is filled with a main adsorption activated carbon layer having a particle size of 30 to 70 mesh at a packing density of 0.4 to 0.7 g / cm ³ , and is constantly compressed, and The internal pressure is improved by discharging the entire amount of permeated water only from a predetermined upper part of the pressure-resistant container without opening it on the side surface of the cylindrical container, and permeation of the entire area regardless of the local route, and the loss of adsorption. Has a real benefit that can be minimized.

[Brief description of drawings]

FIG. 1 is a product sectional view illustrating a structure.

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

FIG. 3 is a chart showing the transition of adsorption removal of total trihalomethanes.

[Explanation of symbols]

 1 Filtration flat membrane 2 Support 3 Pressure vessel 4 Upper groove 5 Lower groove 6 Wire 7 Stepped lower 8 Bottom wire net 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 Circumferential 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 Water inlet 30 Lifting tool

Claims (2)

[Claims] 1. A cartridge having activated carbon and a filtration membrane, which is loaded in a water purifier, is a cylindrical container having a pressure resistance of metal, resin, etc., and 0.4 to 0.7 g of granular activated carbon having a grain size of 30 to 70 mesh. Water is packed at a density of / cm ³ and compressed from the upper and / or lower part to increase the permeation loss of filtered water from the lower part or the upper part of the cylindrical pressure vessel and improve the internal pressure of the cartridge, thereby making the water flow in a local route. A water purifier characterized by being able to permeate the activated carbon layer on the entire surface and improve the adsorption efficiency regardless of the temperature. 2. The purified water according to claim 1, wherein the opening of the upper or lower water inlet is 30% or more of the diameter of the water purifier in order to prevent reduction of filtration efficiency due to formation of water supply and premature deterioration of the local activated carbon. vessel.