JPH09253631A - Water treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water treatment apparatus constituted by combining a novel hollow yarn membrane type filter excellent in filtering capacity and a filter tank having effective magnetizing treatment function and having heat resistance. SOLUTION: A water treatment apparatus consists of a prefilter B being an external pressure filter system wherein a bundle of a plurality of hollow yarn membranes folded back in the central parts thereof in a loop form are housed in a housing container 9 having a wedge-shaped projection 14 formed to the inner surface of one end thereof and the bonding surface of the projection with a potting material 13 is preliminarily subjected to corona discharge treatment in bundling the open end of the hollow yarn bundle to fix the same to the projection by the potting material 13 so that critical surface tension becomes 40dyn/cm or more and hydrophilicity is further imparted to the hollow yarn membranes and susceptible to backwashing and a filter tank C constituted so that granular activated carbon, sand or the like are accumulated in a cylindrical housing having a water inflow port and a water outflow port provided to one end and other end thereof in a bed form and magnets are arranged above and below a granular ceramic accumulated bed at least by one so that the directions of the lines of magnetic force coincide with each other and are set along the flow of water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment device,
More specifically, it relates to a water treatment device for purifying and activating tap water and hot water obtained by heating it.

[0002]

2. Description of the Related Art Conventionally, as a water treatment apparatus for treating tap water, activated carbon, a hollow fiber membrane or the like for removing residual chlorine and pollutants (first generation), and in addition to this Water quality (p
H), etc. have been adjusted (second generation), but in recent years, in addition to this, water molecules have been activated by far-infrared irradiation, magnetization treatment, etc. (third generation). ).

For example, JP-A-1-266892,
Japanese Patent Laid-Open No. 2-115094 and Japanese Patent Publication No. 4-70073.
The publication discloses a water treatment device in which a far-infrared radiator made of ceramic or the like is laid in a channel through which water passes and a magnetic field generator made of a permanent magnet or the like is provided in or around the channel. Has been done.

To briefly explain one example thereof, the conventional water treatment apparatus has a first sand layer in which a first sand layer is formed from an upper part having a water inlet in a cylindrical housing to a lower part having a water outlet. The activated carbon layer, the second sand layer, the magnetic layer and the ceramic layer are laminated via a nonwoven fabric filter or the like. Here, the first sand layer and the second sand layer are made of white sand obtained by specially treating igneous rock Shirasu, and the activated carbon layer is made of antibacterial granular activated carbon, which mainly contributes to residual chlorine, organic substances and harmful substances ( For example, trihalomethane), red rust, impurities, mold odor, etc. are removed. The magnetic layer is a mixture of fine particles of magnetite ore, ferrite magnets, quartz diorexite, and fine granite, and the heavy metals are removed by the magnetic field of the magnetite ore and the ferrite magnet, and the water molecules are removed. Is magnetized to be activated, and further, water quality (pH, etc.) is mainly adjusted by quartz diorite and shale and minerals are replenished. The ceramic layer is made of granular ceramic obtained by specially treating white sand obtained by specially treating igneous rock shirasu at a higher temperature (for example, 1100 ° C.), and activates water molecules by far-infrared irradiation and prevents water quality deterioration.

However, in the above-mentioned water treatment device, since the magnetite ore and the ferrite magnet are randomly mixed in the magnetic layer, the magnetic fields of the individual ferrite magnets cancel each other out, and the magnetic field acting on the water molecules becomes weak. There was a problem that it was difficult to perform activation sufficiently. Further, there is also a problem that the removal performance is deteriorated due to clogging of the filter material or the non-woven fabric filter, the flow rate is decreased, and the service life is shortened. To this problem, provision of an ordinary pleat type prefilter can be improved to some extent. , The same problem due to clogging of the prefilter remains.

On the other hand, a filter having a structure in which a large number of hollow fiber membranes are bundled, and the open ends thereof are gathered at one place and focused and fixed at one end inside the storage container with a potting material is an ultrafiltration, microfiltration or reverse osmosis. It is used for artificial dialysis, gas separation, etc. Generally, the hollow fiber membrane is excellent in the ability to remove fine impurities and microorganisms, but has a small water permeability coefficient, and in order to increase the flow rate, a large number of hollow fiber membrane bundles must be used, It has a drawback that the device becomes large. Therefore, in the domestic water purifier using the hollow fiber membrane, the flow rate is sacrificed to reduce the size at present. Further, when fluids having different temperatures are rapidly or alternately supplied to the hollow fiber type filter having such a structure, a temperature distribution is rapidly generated in the radial direction in the potting portion, and in a place where the temperature gradient is large, Large internal stress occurs, or the expansion rate or contraction rate of the container and the potting material are different, causing stress on the adhesive surface, and tensile stress and shearing stress parallel to the adhesive surface work intricately to bond. When the force is insufficient, peeling may occur at these adhesive surfaces, which may cause leakage.

Adhesion of thermosetting resin for potting, such as polyvinyl chloride, acrylonitrile / styrene copolymer resin (AS resin), polycarbonate, polysulfone, fiber reinforced resin (FRP), etc., to these storage containers and connecting members Although a plastic material having a relatively good property is used, the adhesiveness is not sufficient when hot water (about 80 ° C.) is passed through. In order to prevent this, conventionally, grooves or protrusions are provided on the inner surface of the storage container to increase the adhesive area or to provide an anchor effect to physically supplement the adhesive force. That is, a method of forming a groove on the surface of the storage container that is adhered to the potting material (for example, JP-A-53-102878) or a method of forming a wedge-shaped protrusion (for example, JP-A-6-106).
No. 296834) is known. In this case, in the method of providing the groove on the bonding surface, since the bubbles tend to remain in the groove, the wedge-shaped projection exhibits a more so-called anchor effect than the groove structure, but the heating and cooling are repeated. As a result, even if large peeling does not occur, minute peeling in which leakage can be recognized often occurs. There is also a method of using a so-called primer to supplement the adhesive force, but harmful components may be eluted from the primer.

On the other hand, polypropylene is a material excellent in heat resistance, chemical resistance, mechanical properties, safety, etc.
It has not yet been used as a case material due to its poor adhesion to the thermosetting resin for potting. Further, in the conventional hollow fiber membrane module, the same adhesive as the potting material is used to connect the case materials to each other, or adhesive and screws or welding are used in combination, but polypropylene is the case material for the same reason as above. Not used for.

As the potting material made of thermosetting resin, epoxy resin or urethane resin has been used so far, but it was especially developed as a potting material for hollow fiber type filters for repeatedly filtering liquids having different temperatures. Not a thing. In the case of epoxy resin, heat resistance and strength are improved by selecting alicyclic amine or aromatic amine as the curing agent, but on the contrary, since the flexibility becomes poor, the potting material is cut to open the hollow fiber membrane. When cutting it, it can not be cut sharply with a knife cutter etc., dust may be generated at the time of cutting and the opening of the hollow fiber membrane may be clogged, and the problem of peeling at the adhesive surface of the storage container and the potting material Still remains. In the case of urethane resin, a flexible material that can be sharply cut with a knife cutter is used for some medical applications at room temperature, but it has a tensile strength of several tens of kilograms even at room temperature.
Since it is less than / cm ² , there is a defect that the strength is insufficient when hot water of about 80 ° C. is filtered.

[0010]

When considering the heat resistance of the water treatment device, it is necessary to consider the heat resistance of the filter medium and the container that houses the filter medium. For the filter material itself, it is sufficient to select one with high heat resistance. Actually, heat resistance does not pose a problem at a temperature of about 80 ° C, but the adhesive surface between the storage container and the potting material and the storage container from multiple members. In that case, the heat resistance of the adhesive surface becomes a problem, and in this case, it is required not only to withstand a high temperature but also to withstand repeated heating and cooling. The present invention aims to provide a water treatment device having such heat resistance.

The reason why polypropylene is not used as a case material for hollow fiber membranes is that the adhesiveness with the thermosetting resin, which is a potting material, is poor and that the case materials are difficult to connect to each other as described above. by. Therefore, if these problems are solved, it can be used as an extremely excellent case material.

It is well known that the adhesive strength increases when the surface energies of the adhesive and the adherend are equal.
Epoxy resin or urethane resin is usually used as the potting material for the hollow fiber membrane, but these thermosetting resins are obtained by curing a mixed liquid of a liquid base material and a curing agent. In the case of polyamine and urethane resin, these mixed solutions have relatively large surface energy because polyol is used as a curing agent.
Therefore, other case materials such as polypropylene that do not have a strong adhesive force to a material with a small surface energy and that have a relatively good adhesiveness with the potting material,
When heating and cooling are repeatedly used, the adhesive strength is insufficient.

It is also well known that even a material having a small surface energy such as polypropylene undergoes corona discharge treatment or flame treatment to increase the surface energy and improve the adhesiveness. Therefore, it is possible to give polypropylene resin a strong adhesive force with respect to the potting material of the hollow fiber type filter by subjecting it to such a treatment so that it has an appropriate surface energy. It has never been applied to a thread filter, and the effect in this case is unknown. Also, by devising the shape of the adhesive surface of the storage container and the potting material and also using the anchor effect,
It is expected that the adhesive strength to heating and cooling will be further improved.
Further, as the potting material, it is necessary to employ a material which can be sharply cut with a knife cutter or the like, is durable against repeated heating and cooling, and has sufficient strength.

In view of the above situation, the present invention is to solve the problems by a novel hollow fiber membrane type filtration filter having a large water permeation coefficient, a large flow rate and excellent filtration performance, and a water quality adjusting function. Adhesive part that combines a filtration tank with a mineral replenishment function and an effective magnetization treatment function to make the best use of each feature, allows backwashing and has a long life, and also fixes and fixes the hollow fiber membrane with a potting material. The point is to provide a water treatment device having heat resistance capable of treating hot water of about 80 ° C. by devising the structure and the case material such as the storage container and the potting material.

[0015]

In order to solve the above problems, the present invention is a water treatment apparatus comprising a prefilter and a filtration tank, wherein the prefilter has wedge-shaped projections formed on the inner surface at one end. A bundle of a plurality of hollow fiber membranes folded back in a loop at the center is stored in a storage container made of a thermoplastic resin, and the open ends of the bundles of hollow fiber membranes are focused on the protrusions with a potting material made of a thermosetting resin. When fixing, the adhesive surface of the protrusion with the potting material has a critical surface tension of 40d in advance.
It is a hollow fiber type filter that is subjected to corona discharge treatment so as to be yn / cm or more, hydrophilicity is imparted to the hollow fiber membrane, and can be backwashed by an external pressure filtration method. The filtration tank has one end and the other end, respectively. Granular activated carbon, sand, etc. are deposited in layers in a cylindrical housing having a water inlet and outlet, and at least one magnet is provided above and below the layer in which the granular ceramics are deposited, and the direction of the magnetic field lines. Are arranged in such a way that they match each other and the direction is along the flow of water, and after filtering the raw water with the pre-filter, the filtered liquid is filtered by the filtration tank and activated. A processing unit was constructed.

In this case, the storage container is one in which a ring having wedge-shaped protrusions on its inner surface is adhered, heat-sealed or ultrasonically welded to one end of the porous cylindrical container, or the storage container is a porous cylinder. In a preferred embodiment, one end of the container is heated to a temperature not lower than the heat distortion temperature and then pressure-molded to form wedge-shaped protrusions on the inner surface.

Further, at least one end on the potting material side of the storage container has a connecting member forming a fluid passage bonded, heat-sealed, or ultrasonically melted.

More preferably, the storage container is made of polypropylene or polyvinyl chloride, and the connecting member is made of polypropylene.

Further, the potting material contains an aromatic polyisocyanate having an NCO content of 13 to 18% by weight as O.
It is a urethane resin obtained by curing a mixed liquid in which 100 to 105% of a stoichiometric amount is added to a polyether polyol having an H value of 700 mg-KOH / g or more, and in addition, the viscosity of the mixed liquid is 2000 to 8000 cps. It is preferable that the potting material has a maximum tensile stress at 120 ° C. of 30 to 200 kg / cm ² and an elongation at break of 10% or more.

Further, it is preferable that a layer in which magnetite ore is deposited is provided on at least one of the upper and lower sides of the layer in which granular ceramics are deposited.

More specifically, as the filtration tank, sand, granular activated carbon, sand, taiseki stone, magnetite ore, granular ceramics, magnetite ore and barley stone are deposited in layers from the top to form a first sand layer, Activated carbon layer, 2nd sand layer, Taiseki stone layer, 1st
A magnetite ore layer, a ceramic layer, a second magnetite ore layer, and a barley stone layer, and between the activated carbon layer and the second sand layer, the first magnetite ore layer and the ceramic layer, and the second layer.
Between the magnetite layer and the boiled iron layer, at least one magnet is arranged such that the directions of the lines of magnetic force thereof coincide with each other and the direction is along the flow of water.

Alternatively, as the filtration tank, sand from the top,
Granular activated carbon, sand, Taiseki stone, magnetite ore, granular ceramic,
Magnetite ore and barley stone are deposited in layers to form a first sand layer, an activated carbon layer, a second sand layer, a Taiseki stone layer, a first magnetite ore layer, a ceramic layer, a second magnetite ore layer and a barley stone layer. At least one magnet is formed between the second sand layer and the Taiseki stone layer, between the first magnetite ore layer and the ceramic layer, and between the ceramic layer and the second magnetite layer, respectively. The magnetic field lines are arranged such that the directions of the lines of magnetic force coincide with each other and the directions are along the flow of water.

Alternatively, as the filter tank, sand,
Granular activated carbon, sand, Taiseki stone, magnetite ore, granular ceramic,
Magnetite ore and barley stone are deposited in layers to form a first sand layer, an activated carbon layer, a second sand layer, a Taiseki stone layer, a first magnetite ore layer, a ceramic layer, a second magnetite layer and a barley stone layer. At least one magnet is formed between the first sand layer and the activated carbon layer, between the Taiseki stone layer and the first magnetite layer, and between the second magnetite layer and the barite stone layer. Is used so that the directions of the magnetic force lines thereof coincide with each other and the direction is along the flow of water.

Then, in the above-mentioned concrete filtration tank,
The distance between at least one magnet arranged between layers is substantially the same in the direction orthogonal to each layer, and the magnets arranged between the layers are centered on the central axis of the housing. It is more preferable to use at least two magnets arranged at positions where the central angle on the same circle is equally divided, and to reverse the direction of magnetic force lines of the magnets and the direction of water flow.

[0025]

The water treatment apparatus of the present invention having the above contents has the following actions. As for the pre-filter consisting of hollow fiber type filters, since the hollow fiber membranes have hydrophilicity and the minimum osmotic pressure is low, it can be used immediately by the water pressure of ordinary tap water, and the external pressure filtration is also possible. Since it is possible to backwash with the formula, if the filtration performance is lowered, its function can be restored by backwashing,
It has a long life. In addition, regarding the filtration tank, the magnetic fields of the magnets respectively arranged above and below the layer on which the granular ceramics are deposited will combine with each other to reinforce each other, and since the direction is along the flow of water, Can be effectively magnetized, and since the magnetic field passes through the layer in which the granular ceramics are deposited, the activation effect of water molecules by far infrared irradiation of the granular ceramics is improved.

In the water treatment apparatus in which the prefilter and the filtration tank are combined, the clogging substance in the tap water is captured by the hollow fiber membrane of the prefilter.
There is no problem of clogging of the filter material in the filtration tank,
Since the clogging substance trapped in the hollow fiber membrane is backwashed, the backwashing effect is very high, and as a result, the life of the water treatment device is extended. In addition, in the water receiving tank installed in condominiums such as condominiums, even if microorganisms propagate due to poor water quality due to insufficient management, all can be removed by the hollow fiber membrane, so the filtered liquid that has passed through the prefilter is filtered. By sending it to the tank, it is possible to prevent the growth of microorganisms in the filtration tank. Moreover, residual chlorine, organic substances, harmful substances (such as trihalomethane), red rust, impurities, musty odor, etc. are removed in the filtration tank, water quality (pH, etc.) is adjusted, minerals are replenished,
Furthermore, since water molecules are activated by magnetizing treatment and irradiation with far infrared rays, clean and delicious water can be obtained.

More specifically, in the prefilter, in order to focus and fix the hollow fiber membrane in the synthetic resin container with a potting material made of a thermosetting resin, the adhesive surface of the container to which the potting material is adhered is preliminarily critical. Corona discharge treatment is performed so that the surface tension is 40 dyn / cm or more, and the surface energy of the adhesive surface of the storage container is increased, greatly improving the adhesiveness with potting materials with large surface energy, such as epoxy resin and urethane resin. To do. Thereby, of course, when the storage container is made of a material having relatively excellent adhesiveness to the potting material,
Even when made of polypropylene, which has poor adhesion to the potting material, the storage container and the potting material adhere strongly, and even if heating and cooling are repeated many times, the potting material and the hollow fiber membrane storage container No peeling occurs between them. Furthermore, if a wedge-shaped protrusion is provided on the adhesive surface of the storage container with the potting material to supplement the adhesive strength,
The storage container and the potting material are structurally intertwined with each other, and a large adhesive strength is obtained by the anchor effect.

On the other hand, when ultrasonic welding is performed in a state where the joint surfaces of the storage container and the connecting member to be connected to the end thereof are joined, the fused surface contacts the connecting member and the ultrasonic energy transmitting member. If the distance between the surfaces is set to less than 20 mm, ultrasonic energy is intensively transmitted to the fusion surface, and a strong connection can be achieved by fusion, and if the distance is less than 10 mm, the fusion surface is superposed. Since the sonic energy is more concentrated, even when the storage container and the connecting member are both made of polypropylene, which is not suitable for ultrasonic fusion, they can be firmly ultrasonically fused to each other.

In the potting material made of urethane resin, the heat resistance and strength of the cured product are almost determined by the NCO content and the OH value. FIG. 11 shows a JIS-1 cured product obtained by mixing a polyol-modified MDI and a polyol-modified polymeric MDI to control the NCO content and blending with a trimethylolpropane-based polyether polyol having an OH value of 850 mg-KOH / g. It shows the maximum tensile strength at 120 ° C. measured using a No. dumbbell at a tensile speed of 50 mm / min. Assuming that the vapor pressure of 120 ° C is applied to the potting material as it is, it is considered that at this temperature, a tensile strength of at least 30 kg / cm ² or more is required. Therefore, from this figure, the NCO content must be 13% by weight or more. I understand that it will not happen. A similar relationship is obtained for a mixture of MDI and polymeric MDI, which is almost uniquely determined by the NCO content. On the other hand, if the NCO content exceeds 18% by weight, the cured product becomes too hard and it becomes difficult to cut it sharply with a knife cutter. Therefore, polyisocyanate having an NCO content of 13 to 18% by weight is particularly preferably used in the present invention.

Many types of polyether polyols obtained by adding alkylene oxides such as propylene oxide to sugars, polyhydric alcohols and polyamines are known as curing agents for polyisocyanates, and any of them can be used in the present invention. However, ester-based polyols have drawbacks in chemical resistance and hydrolysis resistance, and are not preferred in the present invention. Further, among polyhydric alcohols, those of glycerin type are also relatively inferior in chemical resistance and hydrolysis resistance. Therefore, a polyether polyol obtained by adding an alkylene oxide to a polyhydric alcohol excluding glycerin, a sugar and a polyvalent amine is preferably used in the present invention. Amine-based polyether polyols such as ethylenediamine have a fast reaction and are suitable for mixing with other polyols to control the reaction rate.

FIG. 12 shows the results of the same measurement as described above in which polyisocyanate having an NCO content of 16% by weight and trimethylolpropane-based polyether polyol having different OH values were blended. The same relationship can be obtained for a polyol to which a sugar and glycerin type polyether polyol or a polyvalent amine type polyether polyol is added. Therefore, it can be seen from this figure that the OH value needs to be approximately 700 mg-KOH / g or more in order to obtain appropriate strength. From the viewpoint of safety, the mixing ratio of the polyisocyanate and the polyether polyol is adjusted within ± 10% of the stoichiometric amount, more preferably within ± 5% of the stoichiometric amount.

The potting of the hollow fiber membrane is performed by centrifugal casting or dipping. When the hollow fiber membrane has large pores, if the viscosity of the potting material at the time of molding is low, the potting of the hollow fiber membrane is possible. Material may penetrate and lose openings. On the contrary, if the potting material has too high a viscosity, it may not be completely filled between the hollow fiber membranes, which may cause leakage. Therefore, the viscosity of the potting material at the time of potting is 2000 by appropriately selecting the molecular weight of the polyisocyanate or polyol and the temperature thereof.
It is necessary to adjust it to be ~ 8000 cps.

For the hollow fiber membrane storage container, a polypropylene perforated cylindrical container is preferably used for the reasons described above. The hollow fiber membrane is usually bundled and fixed together with these storage containers with a potting material having an appropriate thickness. Repeated heating and cooling heat cycles on such a hollow fiber filter may cause internal stress due to temperature distribution inside the potting material, and this stress may exceed the adhesive force at the interface between the storage container and the potting material, causing delamination. is there. Further, when the adhesive strength is strong, the potting material itself may be cracked. In order to avoid such a problem, the potting material must have appropriate flexibility and not generate excessive internal stress during heat cycle.As a measure of such flexibility, when the potting material breaks in the operating temperature range. It was found that the elongation of 10% or more is required. It was also found that this elongation is preferable because it can be cut sharply with a knife cutter.

[0034]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention; FIG. 1 shows a water treatment apparatus of the present invention, in which A is a main case, B is a prefilter, and C is a filter tank.

The pre-filter B in the present invention is for removing fine impurities or microorganisms mixed in the stock solution, and its performance is, for example, a logarithmic removal rate of polymer particles of 0.1 μm of 5 or more, or that of Pseudomonas. The logarithmic removal rate is 7 or more. Further, the filtration tank C removes residual chlorine and the like, adjusts the water quality, replenishes minerals, magnetizes the water molecules to activate them, and activates the water molecules by far-infrared irradiation to prevent water quality deterioration. It is a thing.

The body case A is a pre-filter B which will be described later.
And a filtration tank C are built in to form a water treatment apparatus, and are composed of a base member 1 for fixing the pre-filter B and the filtration tank C in a standing state, and a cover 2 for covering them. . The base member 1 is provided with mounting bases 3 and 4 for fitting and holding the lower ends of the pre-filter B and the filtration tank C, respectively, on the upper surface thereof, and the through holes 5 are formed in the center of the mounting bases 3 and 4. , 6 are formed, and a plurality of leg portions 7, ... Are projectingly provided on the lower surface. And the cover 2 is
It has a box-like shape with the lower part open, and the lower opening 8 is fitted onto the base member 1 and is integrated by an appropriate fixing means.

The prefilter B has a water permeability coefficient of 300.
0 (l / m ² · hr · kg / cm ² ) (however, “l” in the unit represents liter. The same applies hereinafter) is filled with a large number of hollow fiber membranes and the flow rate is 6 (l / l). min) or more, and is composed of a hollow fiber type filter having a heat resistant temperature of 80 ° C. and capable of backwashing by an external pressure filtration method. Specifically, the pre-filter B is composed of a hollow fiber cartridge filter B1 having the above-described filtration performance and a loading case B2 in which the hollow fiber cartridge filter B1 is replaceably mounted.

The hollow fiber type cartridge filter B1
As shown in FIG. 1 and FIG. 2, each is a porous cylindrical container 9a made of a heat-resistant synthetic resin, a header 10 and a bottom 11, and the header 1 is attached to the upper and lower ends of the porous cylindrical container 9a.
0 and the bottom 11 are connected by adhesion, fusion bonding or ultrasonic fusion to form the container 9, and a large number of hollow fiber membranes 12, ... Are loaded inside the container 9.
The hollow fiber membrane 12 is formed by folding it back in a U-shape at the center, and the tip is potted with the storage container 9 with a thermosetting resin. Wedge-shaped projections 14 are formed on the inner peripheral portion of the end of the storage container 9 in contact with the potting material 13 in order to supplement the adhesive force. The wedge-shaped protrusion 14 of this embodiment has a shape in which the inner edge is widened so as to have a tapered surface in the upper and lower portions. In addition, the adhesive surface 15 of the wedge-shaped protrusion 14 has a critical surface tension of 40 after corona discharge treatment.
Potting material 13 with dyn / cm or more
The adhesive strength with is improved.

The undiluted solution introduced into the inside of the storage container 9 from the introduction holes 16 formed in the bottom 11 passes through the hollow fiber membrane 12 and is filtered. The flow passage 1 provided in the header 10 overflows from the end opened through the potting material 13 into the space formed by the potting material 13 and the header 10.
It is discharged to the outside through 7. Here, the introduction hole 16 formed around the storage container 9 is small, and the introduction hole 16 formed in the bottom 11 is set large, and the straight portion 12a of the hollow fiber membrane 12 is the small introduction hole 1 of the storage container 9.
6, the loop portion 12b of the hollow fiber membrane 12 is close to the large introduction hole 16 of the bottom 11. The header 10 has a cylindrical opening having a flow passage 17, around which a single or a plurality of O-rings 18 are attached, and the O-ring 18 seals a loading case B2 described later. Be worn.

In the loading case B2, in this embodiment, the upper lid 20 is fitted to the upper end of the outer cylinder 19 with the O-ring 21 interposed, and the ring-shaped tightening is screwed to the upper end of the outer cylinder 19. The structure is such that the upper lid 20 is detachably attached with the attachment 22. Then, an inflow pipe 24 having a threaded portion on the outer periphery is provided in a protruding manner at the central portion of the bottom surface 23 of the outer cylinder 19,
With the bottom surface 23 part fitted to the mount 3 and the inflow pipe 24 inserted in the through hole 5, the base 25 is fixed to the base member 1 by screwing the base 25 into the inflow pipe 24, and the inflow is performed. The hose 26 is connected. Also, the upper lid 2
A cylindrical portion 27 into which the mouth portion of the header 10 is fitted is formed inside 0, and when the hollow fiber cartridge filter B1 is housed inside the loading case B2, the O
The ring 18 is in close contact. Further, a plurality of ribs 28, ... Are vertically provided below the inside of the outer cylinder 19 to hold the lower portion of the storage container 9 without rattling. And
An outflow pipe 29 is projected from the upper end of the upper lid 20, and one end of a connection hose 30 is connected to the outflow pipe 29.
1 is connected.

Here, the hollow fiber membrane 12 must withstand not only the filtration pressure but also the vibration and the tensile load to the hollow fiber generated when a large amount of fluid is filtered. Therefore, the tensile strength per hollow fiber needs to be 100 g or more, more preferably 150 g or more. The maximum elongation is required to be 20%, more preferably 30% or more. Moreover, it is possible to analytically set the inner diameter that maximizes the water permeation rate of the pre-filter B while maintaining the strength of the hollow fiber membrane 12. If the hollow fiber is made thin, the effective filtration area of the hollow fiber that can be stored can be increased, but when water is filtered from the outside of the hollow fiber like the ordinary pleated cartridge filter, the filtered water flowing inside the hollow fiber is filtered. Pressure loss increases. Therefore, there is an optimum value of the dimension of the hollow fiber that maximizes the water permeation rate of the prefilter B corresponding to the water permeability coefficient of the hollow fiber.

For example, the water permeability coefficient of the hollow fiber is 1000,
5000 and 10000 (l / m ² · hr · kg / cm ²
In the case of (1), the water permeation rate when the pre-filter B is used depends to some extent on the wall thickness of the hollow fiber required to maintain the strength, but it becomes maximum at approximately 300 μm, 400 μm and 500 μm, respectively. At this time, the water permeation rate as a standard size cartridge filter corresponding to the pleated cartridge filter is 0.1 kg / cm.
^At a filtration pressure of ² , approximately 4, 11, 17 (l /
min).

As a material for such a hollow fiber membrane 12,
Polyethylene, polypropylene, polycarbonate, polyacrylonitrile, polytetrafluoroethylene, polyvinylidene fluoride, polyfluorinated ethylene, cellulose acetate, regenerated cellulose, polysulfone, polyether sulfone, polyester, aromatic polymers, etc. It is possible to use a fibrillated product. Further, among the aromatic polymers, aromatic polyether, aromatic polyester, aromatic polyamide, aromatic polyimide, and aromatic polysulfone can be mentioned. Of these, chemical resistance, mechanical strength, heat resistance,
Aromatic polysulfones such as polyether sulfone and polyallyl ether sulfone having excellent basic properties such as filtration properties are particularly preferable, and polysulfones can also be preferably used.

By the way, in order to filter water through a membrane having a finite contact angle with respect to water, it is necessary to pressurize above a certain fixed pressure, which is usually called minimum osmotic pressure. In the case of the hydrophobic hollow fiber membrane made of the above-mentioned material, this contact angle is large and the minimum osmotic pressure is accordingly large. If the membrane is completely hydrophilic, or if it is completely wet with water and the contact angle is 0, then the minimum osmotic pressure will also be 0, but in practice the membrane will not have a practically problematic minimum osmotic pressure. It must be hydrophilic or wet.

To impart hydrophilicity to the above-mentioned aromatic polymer-based hydrophobic membrane, it is carried out by irreversibly adsorbing the hydrophilic cellulose derivative which is previously separated by separating out the one which is not completely dissolved in the solvent. As a result, a hydrophilic film containing very little eluate can be obtained. Here, as the hydrophilic cellulose derivative, methyl cellulose, carboxymethyl cellulose, low-substituted hydroxypropyl cellulose, and hydroxypropyl methyl cellulose are preferable, and these can be used alone or in combination of two or more kinds. These hydrophilic cellulose derivatives are easy to handle because they dissolve in water or an alkaline aqueous solution. Further, the solvent used for separating the insoluble portion from these cellulose derivatives is not particularly limited, but for example, water, ethanol, aqueous ethanol solution, ethanol / alkali aqueous solution and the like can be preferably used. Further, as is well known, the molecular weight cutoff can be adjusted by changing the solubility of the fractionation solvent. A large aggregate containing an insoluble portion precipitated by fractionation can be filtered with a filter paper or the like, but in the case of spontaneous precipitation, a component containing no insoluble portion can be obtained only by collecting the supernatant solution.

The number average molecular weight of commonly available cellulose derivatives is about 10,000 to 300,000 (for example, refer to the section on hydroxypropylmethylcellulose in the Japanese Pharmacopoeia).
Since the proportion of the insoluble portion increases as the molecular weight increases, it is preferable to select a raw material having a molecular weight as small as possible before fractionation. When the insoluble portion was separated from such a raw material by the above method, the number average molecular weight was 2000.
~ 8000 cellulose derivatives are obtained.

According to the research conducted by the present inventors, hydroxypropyl cellulose having a methyl cellulose content or hydroxypropyl group content of about 1/10 of that of hydroxypropyl cellulose and hydroxypropyl cellulose having a low degree of substitution adsorb more strongly than hydroxypropyl cellulose. Therefore, the aromatic residue, that is, the hydrophobic binding group for polysulfone is the glucose residue itself which is a cellulose skeleton, and the hydroxypropyl group imparts hydrophilicity like the methoxy group, but reverses the hydrophobic binding for polysulfone. Based on the finding that it interferes with the use of a cellulose derivative, the amount of these substituents is about 40% or less in order to exert a strong irreversible bond, and about 10% or more in order to impart hydrophilicity. Have been found to be preferable. When such a cellulose derivative is used, even if the molecular weight is less than 10,000, it can be strongly irreversibly adsorbed to polysulfone and can be imparted with hydrophilicity. However, when the molecular weight is less than 2000, the binding force also decreases.

Although the above-mentioned cellulose derivative solution is impregnated into the hydrophobic membrane to irreversibly adsorb it, a small amount of alcohol such as ethanol may be added to the solution for rapid impregnation. The concentration of the cellulose derivative is about 50 to 1000 ppm, and the hydrophobic membrane is brought into contact with the solution of the cellulose derivative within 10 minutes to 2 hours. Here, in the case of impregnation, if the hydrophobic membrane is wet with water in advance, it may be simply immersed in the solution of the cellulose derivative, and if it is dry, it is forcibly pressed.

An example of specifically producing the hydrophilic hollow fiber membrane by this method will be described below. A solution of 20 parts by weight of polyallyl ether sulfone (P-3500, Teijin Amoco Engineering Plastics Co., Ltd.) and 80 parts by weight of dimethylsulfoxide is kept at 70 ° C. in air from a double tubular nozzle together with a propylene glycol aqueous solution containing a small amount of water. To about 10 cm below the nozzle, infiltrate it into warm water, and then wind it up.
m hollow fibers were prepared. After bundling the hollow fibers, the hollow fibers were washed with hot water until the remaining amount of dimethyl sulfoxide was about 1 ppm. Then, the average molecular weight of the hollow fiber bundle is 25
500p of 00 hydroxypropylmethylcellulose
After impregnating the pm aqueous solution with showering at 40 ° C. for 1 hour, water was immediately showered at 50 ° C. for 1 hour to wash away the aqueous solution of hydroxypropylmethyl cellulose. This hollow fiber bundle was dried at 90 ° C. to prepare a desired hydrophilic hollow fiber membrane.

As a method for wetting the hydrophobic membrane with water, a solution having a small contact angle with the membrane may be brought into contact with the membrane, the entire membrane may be wet with the solution, and then the solution may be replaced with water. As the solution, a so-called organic solvent, a mixed solution of two or more kinds of organic solvents, an aqueous solution of an organic solvent, an aqueous solution of an organic substance, or the like can be used. As the organic solvent, various alcohols such as methanol and ethanol and acetone are preferable. Further, the organic substance is preferably a surfactant or the like. As a method for wetting the entire hollow fiber membrane with these solutions, a usual method can be used. The method of passing the solution through the hollow fiber membrane is preferable to the method of immersing the hollow fiber membrane in the solution. Then, it is washed with water to replace the substance attached to the membrane with water. Even if the hydrophobic membrane is simply wetted with water by such a method, the hydrophilicity can be imparted, and if the wet state can be maintained without being dried until actually used, the tentative purpose can be achieved. In this way, the membrane has hydrophilicity because more than a certain amount of water molecules are attached to the membrane surface and the pores of the hydrophobic membrane,
The required amount of water depends on the material and structure of the membrane,
It is usually 5 to 30% of the membrane weight. The effect does not change even if it contains more water, and there is no problem.

Further, the hollow fiber type cartridge filter B
It is preferable that the whole of No. 1 is sterilized. Specific examples of the sterilization method include ethylene oxide gas sterilization, autoclave sterilization, γ-ray sterilization and the like. In order to prevent recontamination after the sterilization operation and maintain the desired effect until the time of use, it is necessary to seal the cartridge filter with a sterilizable film material having a high gas barrier property depending on the environment. is there. Various commercially available sterilization bags can be used for this. Further, it may be sealed in a plastic container for the purpose of reinforcing the maintenance of the effect.

For example, a hollow fiber type cartridge filter B1 having a hollow fiber membrane made of polysulfone is immersed in a 30% ethanol aqueous solution for 10 minutes, and then water is passed through to remove ethanol, and at the same time, the membrane is wetted with water to immediately sterilize the bag. And sealed under reduced pressure, then at 121 ° C under pressurized steam 1
Time processed. After leaving at room temperature for 1 week, the hollow fiber cartridge filter was taken out from the sterilization bag and filtered with water. Immediately after expelling the air on the raw water side, 20
(1 / min) and the filtration pressure was 150 mmHg, and the minimum osmotic pressure did not exceed the filtration pressure. No bacteria were detected in the filtrate.

Next, the filtration tank C will be described in detail.
As shown in FIGS. 1 and 3, the filtration tank C is a housing 32 made of a heat-resistant synthetic resin filled with a special filtration material, and the housing 32 has a cylindrical filtration tank main body 33. A cap 34 is hermetically attached to the upper end of the cap 34, and the other end of the connecting hose 30 is connected to the threaded inflow pipe 35 projecting from the cap 34 by screwing a cap 36, and the primary passage passes through the pre-filter B. The filtrate is further filtered with a filter material. And the bottom surface 3 of the housing 32
7 is fitted to the mounting base 4, and a threaded outflow pipe 38 projecting from the bottom surface 37 is inserted into the through hole 6, and a cap 39 is screwed into the outflow pipe 38 so that the filtration tank C
Is attached to the base member 1 in a standing state, and at the same time, the outflow hose 40 is connected. In the figure, 35a is an inlet, 3
8a is an outlet.

FIG. 3 shows a main part of a typical embodiment of the filtration tank C. In the figure, 32 is a housing, 41 is a first sand layer, 42 is an activated carbon layer, 43 is a second sand layer, 44 Is a Taiseki stone layer, 45 is a first magnetite layer, 46 is a ceramic layer, 4
Reference numeral 7 is a second magnetite layer, 48 is a barley stone layer, 51 is a perforated filter, 52 is a non-woven filter, 53 is a partition net, and 60-1, 60-2 and 60-3 are magnet plates.

The first sand layer 41 and the second sand layer 43 are layers of white sand obtained by specially treating igneous rock Shirasu, and the activated carbon layer 42 is a layer of granular activated carbon. By these, residual chlorine, organic substances, harmful substances (eg trihalomethane), red rust, impurities, musty odor, etc. are mainly removed. Further, the Taisekiseki layer 44 and the Bakuhanseki layer 48 are formed by depositing fine pieces of Taisekiseki and Bakuhanseki, respectively, and mainly adjust water quality (pH and the like) and supply minerals. The activated carbon layer 42 is not limited to granular activated carbon, and fibrous activated carbon can be used as appropriate.

The first magnetite ore layer 45 and the second magnetite ore layer 47 are formed by depositing pieces of magnetite ore in layers.
It is magnetized by the magnetic field of a magnet described later, removes heavy metals and magnetizes water molecules to activate them.
The ceramic layer 46 is formed by layering granular ceramics obtained by specially treating white sand obtained by specially treating igneous rock shirasu at a high temperature (for example, 1100 ° C.), activating water molecules by far infrared irradiation and deteriorating water quality. Prevent.

The perforated filter 51 is composed of a plastic plate having a large number of fine holes formed on almost the entire surface thereof, and separates and holds the above-mentioned layers together with a well-known nonwoven fabric filter 52 and a partition net 53.

The magnet plates 60-1 to 60-3 all have the same structure, and as shown in FIG. 4, three coin-shaped magnets 61 and a plastic plate provided with a large number of fine holes (not shown) on substantially the entire surface. Each of the three magnets 61 is composed of a spacer 62 made of, for example, three magnets 61. It is designed to be held in a position divided into three equal parts at an angle of 120 °. The magnet 61 is a strong magnet whose surface is coated with plastic or the like (for example, residual magnetic flux density 12000 gauss),
It is magnetized in the axial direction.

Thus, in the main body 11 of the housing 32, the layers, the filters and the plates described above are denoted by reference numerals 51, 52, 41, 52, 53, downward from the upper part thereof.
42, 52, 60-1, 52, 43, 52, 53, 4
4, 53, 52, 45, 52, 60-2, 46, 53,
52, 47, 52, 60-3, 48, 52, 51 are stacked in this order to form a filtration tank. At this time, the magnet plates 60-1 to 60-3 are the magnet plates 6
0-1 and 60-2 spacing and magnet plate 60-
2 and 60-3 are substantially the same in distance, and the respective magnets 61 are positioned so that the positions thereof match in the vertical direction.
All of the magnets 0 to 3 are arranged such that their magnetic lines of force are aligned with each other, in particular, so that they are opposite to the flow of water, and the lines of magnetic force are aligned with the flow of water.

According to this filtration tank, the magnetic lines of force of the magnets 61 of the magnet plates 60-1 to 60-3 are combined with each other to reinforce each other, particularly in the upward direction, that is, along the flow of water and in the opposite direction. Uniform and strong magnetic field 63
Further, since the magnetic field 63 strongly magnetizes the entire first magnetite ore layer 45 and the second magnetite ore layer 47, water molecules are generated between the magnet plate 60-1 and the magnet plate 60-3. , In particular the first magnetite ore layer 45 and the second
When passing through the magnetite ore layer 47, the magnetism is effectively magnetized. Further, the magnetic field 63 and the first magnetite ore layer 45 and the second magnetite ore layer 4 magnetized by the magnetic field 63.
Since the magnetic field generated by 7 passes through the ceramic layer 46, the activation of water molecules by far-infrared irradiation is further enhanced. The operation of each of the other layers is the same as in the case of the conventional filtration tank.

FIG. 5 shows another embodiment of the filter tank C. In the figure, the same components as those of the embodiment of FIG. 3 are designated by the same reference numerals. That is, 32 is a housing, 41 is a first sand layer, 42 is an activated carbon layer, 43 is a second sand layer, 44 is a Taisekiseki layer, 45 is a first magnetite ore layer, 46 is a ceramic layer, 4
Reference numeral 7 is a second magnetite layer, 48 is a barley stone layer, 51 is a perforated filter, 52 is a non-woven filter, 53 is a partition net, and 60-1, 60-2 and 60-3 are magnet plates.

The structure of the present embodiment is basically the same as that of the embodiment of FIG. 3, but the thickness of the activated carbon layer 42 is expanded to about 1/2 of the entire housing, that is, the magnet plate 60-1.
Is disposed between the second sand layer 43 and the Taiseki stone layer 44, and the magnet plate 60-3 is connected to the ceramic layer 46 and the second layer.
Of the magnetite ore layer 47, the point except the partition member between the Taiseki stone layer 44 and the first magnetite ore layer 45, and the partition member between the second magnetite ore layer 47 and the barley stone layer 48. The difference is that it is excluded.

According to this filter tank, residual chlorine, organic substances, harmful substances, red rust, impurities, mold odor, etc. can be more strongly removed by the thickness of the activated carbon tank 42, and each magnet plate 60-1 As the interval of ~ 60-3 became narrower,
A stronger magnetic field is formed, and the magnetic field and the first and second magnetite ore layers 45 and 4 magnetized thereby
The magnetic field of 7 further enhances the magnetization treatment of water molecules and the activation of water molecules by far-infrared irradiation of the ceramic layer 46.

FIG. 6 shows still another embodiment of the filtration tank C. In the figure, the same components as those of the embodiment of FIG. 3 are designated by the same reference numerals. That is, 32 is a housing, 41 is a first sand layer, 42 is an activated carbon layer, 43 is a second sand layer, 44 is a Taisekiseki layer, 45 is a first magnetite ore layer, 46 is a ceramic layer, 4
Reference numeral 7 is a second magnetite layer, 48 is a barley stone layer, 51 is a perforated filter, 52 is a non-woven filter, 53 is a partition net, and 60-1, 60-2 and 60-3 are magnet plates.

The constitution of this embodiment is basically the same as that of the embodiment of FIG. 3, but the thickness of the activated carbon layer 42 is expanded to about 1/2 of the entire housing, that is, the magnet plate 60-1.
Is arranged between the first sand layer 41 and the activated carbon layer 42, and the magnet plate 60-2 is arranged between the Taisekiseki layer 44 and the first magnetite ore layer 45.

According to this filtration tank, residual carbon, organic substances, harmful substances, red rust, impurities, mold odor, etc. can be removed more strongly because the activated carbon layer 42 becomes thicker, and the magnet plate 60-1 can be removed. Since it is arranged at the upper portion, an average magnetic field is formed in the entire filtration tank, and the magnetic field magnetizes water molecules in the entire filtration tank.

In the water treatment apparatus of the present invention as described above, when the raw water supplied from the inflow hose 26 connected to the water pipe is poured into the loading case B2 constituting the prefilter B from the inflow pipe 24 at the lower end. The raw water enters the storage container 9 through the introduction holes 16, ... Of the hollow fiber type cartridge filter B1 and is permeated from the outside of the hollow fiber membranes 12 ,. The filtrate passing through the inside of the hollow fiber membrane 12 overflows from the end of the hollow fiber membrane 12 opened on the upper surface of the potting material 13, and passes through the connection hose 30 connected to the outflow pipe 29 at the upper end, Water is poured into the housing 32 from the inflow pipe 35 at the upper end of the filter tank C arranged in parallel with the pre-filter B, and various treatments are internally performed as described above and treated by the outflow hose 40 connected to the outflow pipe 38 at the lower end. Water is discharged. Here, since the pre-filter B and the filtration tank C are connected to each other at the upper end portion by the connection hose 30, the length of the connection hose 30 can be shortened, thereby reducing the pressure loss in the connection hose 30. It can be suppressed to the minimum.

Next, concrete examples of the respective parts of the hollow fiber type cartridge filter B1, particularly the joints between members will be described. First, the wedge-shaped projections 1 projecting from the inner circumference of one end of the perforated cylindrical container 9a constituting the storage container 9
A method for forming 4 will be illustrated. Of course, it is possible to integrally form the wedge-shaped protrusions 14 in the porous cylindrical container 9a, but it is not possible to integrally form the porous cylindrical container 9a and the bottom 11 or depending on the shape and arrangement of the introduction hole 16. In some cases. The following exemplifies the method by which the wedge-shaped protrusions 14 can be formed in that case as well.

FIG. 7 (a) shows one end of the perforated cylindrical container 9a,
The ring member 70 having the wedge-shaped projections 14 projecting from the inner circumference is heat-sealed. In the figure, reference numeral 71 denotes a heat fusion portion (joint portion) between the porous cylindrical container 9a and the ring member 70, and reference numeral 72 denotes a heat fusion portion (joint portion) between the ring member 70 and the header 10 as a connecting member. In addition, when heat fusion is difficult or when adhesion is easy, it is also possible to use an adhesive to bond them. In this case, the joints 71 and 72 are shown in FIG.
It is preferable to form a concavo-convex fitting structure as shown in (b) and form a joint surface 73 to increase the adhesion area.

The storage container 9 or the perforated cylindrical container 9a
The ring member 70 having the wedge-shaped protrusions 14 is formed of a thermoplastic synthetic resin. For example, suitable materials for heat fusion include polyethylene, polypropylene,
There are acrylonitrile / styrene copolymer (AS resin), polycarbonate, and the like. Among them, polypropylene is particularly preferable, and preferable materials for adhesion are polyvinyl chloride, chlorinated polyvinyl chloride, polysulfone,
There are polyvinylidene fluoride and the like, and among them, polyvinyl chloride is particularly preferable. The thermal fusion bonding is a more preferable method than the adhesive bonding because it does not cause the solvent to be eluted and will be described in more detail.

Ring members 70 are heat-sealed to both ends of the cylindrical container 2 by the processing method shown in FIG. The porous cylindrical container 9a and the ring member 70 formed by cutting or injection molding are brought into contact with a heater 74, heated to a melting temperature or higher of these, and then removed from the heater 74, and heated surfaces are brought to each other before the temperature falls below the melting temperature. While pressing, hold until the temperature falls below the heat distortion temperature. For example, when polypropylene is used as these materials, the surface temperature is 250
The porous cylindrical container 9a and the ring member 70 are brought into contact with the heater 74 at 280 ° C. for 5 to 10 seconds to melt the tips of the respective containers, and then heat deformation is performed while pressing the respective heating surfaces before reaching the melting temperature or lower. The temperature is maintained below the temperature, for example, below 100 ° C. Even when the materials are different, the same processing can be performed by selecting an appropriate melting temperature.

FIG. 9 shows a method for processing the wedge-shaped protrusions 14 by heat / press molding on the inner surface of one end of the porous cylindrical container 9a. In step 1 of FIG. 9 (a), a perforated cylindrical container into which a right core 75 having a wedge mold 75a on one end and a left core 76 having a wedge mold 76a on the other half can be inserted at the tip is inserted. 9a is attached to a female mold 77 that has a heater and can be opened and closed. In the figure, 16 is a large number of holes (introduction holes). Next, in step 2 of FIG. 9 (b), the processed portion of the porous cylindrical container 9a is heated to a temperature not lower than the thermal deformation temperature by a heater, for example, 17 when the cylindrical container is polypropylene.
While heating to 0 to 250 ° C., the wedge-shaped molds 75a and 76a of the cores 75 and 76 are pushed in so that the tip of the softened cylinder is filled. Finally, after cooling to below the heat deformation temperature, the female mold 77 is opened, the left and right cores 75, 76 are removed, and the perforated cylindrical container 9 having the wedge-shaped projections 14 at the tips thereof.
a is formed.

FIG. 10 is a perspective view of a cross section of the ring member 70 having the wedge-shaped protrusions 14, and an air vent hole 78 (FIG. 10) for preventing bubbles from remaining on the wedge surface when the potting material is filled. (a)) or notch 79 (Fig. 10)
(b)) is formed. Incidentally, the through hole 78 or the notch 7
9 is the case where the porous cylindrical container 9a and the ring member 70 having the wedge-shaped protrusions 14 are separately molded and adhered or heat-sealed to each other, or the wedge-shaped protrusions 14 are heated and pressed at one end of the porous cylindrical container 9a. In either case, it can be integrally formed at the time of molding, or can be formed by perforation or cutting as a post-process.

Epoxy resin or urethane resin is usually used for the potting material 13. In order to withstand repeated heating and cooling, these potting materials are required to have a maximum tensile strength of several tens of kg / cm ² or more and an elongation at break of approximately 10% or more in the range of operating temperature. As an example of such a potting material, a bisphenol A epoxy resin using a curing agent in which an acrylonitrile-butadiene copolymer oligomer whose end is aminated is added to an alicyclic polyvalent amine as a flexibility-imparting agent, or , NC
Examples of the urethane resin include a polyisocyanate having an O content of 13% by weight or more and a polyether having an OH value of 700 mg-KOH / g or more.

More specifically, the urethane resin used in the potting material 13 has an NCO content of 13 to 18 based on the above consideration made based on the results of FIGS. 11 and 12.
OH value of 700% by weight of aromatic polyisocyanate
It is preferable that a mixed solution obtained by adding 100 to 105% of a stoichiometric amount to mg-KOH / g or more polyether polyol is cured, and the viscosity of the mixed solution is 2000 to
More preferably, it is 8000 cps, the maximum tensile stress at 120 ° C. is 30 to 200 kg / cm ² , and the elongation at break is 10% or more. By providing these characteristics, the filling operation when the hollow fiber membrane 12 is focused and fixed by the potting material 13, the potting material 13
The workability, heat resistance, and other properties when the hollow fiber membrane 12 is opened by cutting the hollow fiber satisfy all the properties required for the potting material 13 of the hollow fiber cartridge filter B1.

Regarding the safety of the urethane resin described above,
3 mm thick so that the same curing temperature and time as the potting material 13 of the hollow fiber type cartridge filter B1 are obtained.
Made of a urethane resin plate of "Food Sanitation Law / Foods, Standards of Additives, etc. (Showa 34 Ministry of Health and Welfare Notification 370)" Ministry of Health and Welfare Notification No. 20) Operating temperature is 100 ° C
Or more ”(hereinafter referred to as the Food Sanitation Act) or“ Japanese Pharmacopoeia, Infusion Plastic Container Testing Method ”(hereinafter referred to as the Pharmacopoeia).

The strength of the urethane resin is expressed by the maximum tensile stress (unit: kg / cm ² ), and a JIS-1 dumbbell cut out from the above plate is used, and 50 mm / mm at a predetermined temperature using an autograph. It was measured at a pulling speed of minutes and the elongation at break (%) was also measured.

Further, the chemical resistance of the urethane resin is: water, an aqueous solution of sodium hypochlorite having an effective chlorine concentration of 1000 ppm,
1% hydrogen peroxide aqueous solution, 3% formalin aqueous solution, pH 1 aqueous solution adjusted with nitric acid, p adjusted with caustic soda
The dumbbells were dipped in each of the aqueous solutions of H14 at 30 ° C. for 1 week, washed with water, and the strength was measured by the above method without drying, and the strength before dipping was evaluated.

As an example, a polyol-modified MDI is shown.
NCO by mixing and polyol modified Polymeric MDI
Content is 13.4% (wt%, the same below), 16.0%, 1
3 types of polyisocyanate adjusted to 8.0% are OH
A trimethylolpropane-based polyether polyol having a valency of 850 mg-KOH / g was added at a stoichiometric amount of 10 at 50 ° C.
Degas the compounded solution containing 5% under reduced pressure for 2 minutes, then pour it into a mold to cure it, make plates with a thickness of 3 mm, cut out JIS-1 dumbbells from these plates, and pull at a maximum of 120 ° C. As a result of measuring the strength (kg / cm ² ), they were 55, 135, and 196, respectively, and the elongations (%) at break were 51, 31, and 13, respectively.

In addition, polyol modified polymeric MDI having an NCO content of 16.0% has an OH value of 720, 850,
1000 mg-KOH / g of three types of trimethylolpropane-based polyether polyols were blended, a dumbbell was prepared in the same manner as described above, and the maximum tensile strength (kg / cm ² ) at 120 ° C. was measured.
The elongations at break (%) were 135, 174 and 38, 31, 22, respectively.

Further, a small amount of ethylenediamine-propylene oxide-modified polyol was added to polyol-modified MDI having an NCO content of 15% and trimethylolpropane-based polyether polyol to give an OH value of 820 mg-K.
A urethane resin plate was prepared in the same manner as above by blending OH / g of polyether polyol. The maximum strength and elongation at 120 ° C of this urethane resin are 97 kg /
It was cm ² and 42%. Further, the results of the food hygiene law and the pharmacopoeia test of this urethane resin were all acceptable. In addition, as a result of conducting a chemical resistance test on this dumbbell,
Although no difference was observed depending on the test solution, the maximum tensile strength was reduced by about 30% compared to before the test, and the elongation was unchanged.

Next, the adhesiveness between the wedge-shaped projections 14 and the storage container 9 will be described. As described above, the potting material 13 is usually made of thermosetting resin such as epoxy resin or urethane resin. These are used by injecting a liquid mixture of a so-called liquid main agent and a curing agent into a mold equipped with a hollow fiber membrane and a container for accommodating the same by dipping or centrifugal casting, followed by curing. The curing agent of the epoxy resin has a secondary or tertiary amine or carboxylic acid anhydride as a reactive group, and these react with the epoxy group of the main component to form a cured product. The urethane resin curing agent has a hydroxyl group or an amino group as a reactive group, and these react with the main component isocyanate to form a cured product.

Therefore, if these reactive groups are present in the polymer on the surface of the container for accommodating the hollow fiber membrane (adhesive surface 15 of the wedge-shaped projections 14), a strong adhesive force is obtained by chemically bonding with the main agent. It is known that oxygen in the air, mainly in various molecular forms, is introduced when corona discharge treatment is performed on the surface of a synthetic resin, and it is presumed that some of them react with the main agent. It

FIG. 13A shows a part of an apparatus for corona discharge treatment of the adhesive surface 15 of the storage container 9 to the potting material 13 including the surface of the wedge-shaped projection 14. The diameter of the illustrated ring-shaped electrode 80 is smaller than the inner diameter of the wedge-shaped protrusion 14 by about 2 mm, and the bonding surface 15 is subjected to corona discharge treatment while the storage container 9 moves up and down to move in and out of the ring-shaped electrode 80. In addition, the electrodes are linear electrodes 81 as shown in FIG. 13 (b).
Alternatively, the storage container 9 is rotated around the linear electrode 81, and the adhesive surface 15 is moved along the linear electrode 81 to perform the corona discharge treatment. The change in surface energy of the surface treated by corona discharge is evaluated by measuring the critical surface tension with a commercially available standard solution of wetting index.

FIG. 14 is a surface analysis before the corona discharge treatment, and FIG. 15 is a surface analysis of polyvinyl chloride after the corona discharge treatment by X-ray photoelectron spectroscopy. After the corona discharge treatment, a large amount of oxygen element is found on the surface molecules of polyvinyl chloride.
16 is a surface analysis of polypropylene before corona discharge treatment, and FIG. 17 is a surface analysis of polypropylene after corona discharge treatment. Similar to polyvinyl chloride, a large increase in the oxygen element, which was hardly present before the treatment, is observed. Similar changes are observed in polyethylene, polycarbonate, chlorinated polyvinyl chloride, polysulfone, polyvinylidene fluoride, acrylonitrile / styrene copolymer, etc., and are considered to be changes that occur in synthetic resins in general.

On the other hand, as is well known in the art, the maximum physical adhesive strength can be obtained when the surface energies of the adhesives are almost equal to each other. The potting material has a functional group with a large polarity and has a relatively large surface energy, but when the surface of the container of the hollow fiber membrane made of synthetic resin is subjected to corona discharge treatment, the surface energy becomes large and the physical adhesion Power also improves. The increase in surface energy due to the corona discharge treatment can be confirmed by its critical surface tension (surface tension of liquid at which the contact angle becomes 0).

In the case of the epoxy resin or urethane resin used in the hollow fiber type cartridge filter B1, the adhesive strength of the hollow fiber membrane 12 with the storage container 9 is more preferably when the critical surface tension is about 40 dyn / cm or more. 60d
It becomes strong at yn / cm or more. As described above, corona discharge treatment not only increases the surface energy, but also introduces a functional group that chemically reacts with the potting material, so that the physical effect and the chemical effect are overlapped, resulting in a stronger adhesive force. It is thought to occur. The adhesive strength in this case may exceed the breaking strength of the potting material itself.

Next, with reference to FIG. 18, the ultrasonic welding of the container 9 and the header 10 and the bottom 11 as the connecting member having the passage for the fluid will be described. The storage container 9 of the hollow fiber cartridge filter B1 of the present embodiment is
A porous cylindrical container 9a, a header 10 and a bottom 11 connected to the porous cylindrical container 9a.
The bottom 11 is made of polypropylene. The hollow fiber membranes 12 to be loaded in the storage container 9 are formed by folding a large number of U-shaped membranes in the central portion, and the tips are potted together with the storage container 9 with a thermosetting resin. The wedge-shaped projection 14 provided to supplement the adhesive force is provided on the inner peripheral portion of the end of the porous cylindrical container 9a that is in contact with the potting material 13.
It has a shape in which the inner edge is widened so as to have tapered surfaces on the top and bottom.

Normally, polypropylenes are melted by heating the bonding surface at about 300 ° C. for a few seconds and connected by heat fusion. However, in the hollow fiber type cartridge filter B1, the bonding part is near the potting part. When heated at such a high temperature for a short time, the potting material 13
There is a possibility that the adhesive force between the container 9 and the storage container 9 may be reduced and peeling may occur between them.

Ultrasonic energy transmission member (horn) 8
2 is a flat contact surface 83 formed above the ultrasonic fusion-bonded portion 72 (joint portion) of the header 10.
It makes contact with and transfers its energy. Similarly, the bottom 11 makes contact with the flat contact surface 83 formed below the ultrasonic fusion bonding portion 72 (joint portion) to transmit energy.

FIG. 19 shows the header 10 before fusion,
The fusion-bonded surface 84 of the header has a protrusion 85 for concentrating ultrasonic energy. The bottom 11 also has a similar protrusion. The bottom side of the projection 85 is 1/3 to 1 of the width of the fusion bonding surface 84.
/ 5 is preferable, and the height is preferably 0.3 to 1.0 mm. If these dimensions are too large, excessive ultrasonic energy is required to melt the protrusions 85, and the hollow fiber membrane 1
2 may be damaged. On the other hand, if it is too small, the entire surface is not fused and the adhesive strength may be low, or leakage may occur.

The contact surface 83 and the fusion bonding surface 84 of the horn 82.
The distance between them is less than 20 mm, more preferably 10 mm
Less than is better. Since polypropylene is a relatively flexible material, ultrasonic energy is easily absorbed by the material itself, and if this distance is long, excessive ultrasonic energy will be required,
The hollow fiber membrane 4 may be damaged or the contact surface 83 with the horn 82 may be damaged. It is preferable that this distance is small, but it is usually required to be 4 mm or more in view of the strength of the header 10 itself.

The ultrasonic fusing equipment is not limited, but the frequency is preferably about 20 kHz in order to effectively transfer the fusing energy to polypropylene. Regarding the transmission condition of ultrasonic energy, it is preferable to lengthen the fusion time, because the transmission efficiency of ultrasonic energy is relatively poor as compared with the case where the pressing force of the horn 82 is increased.

Finally, the results of examining the heat resistance of each hollow fiber type cartridge filter B1 manufactured by the following manufacturing method will be illustrated.

The inner surface of one end of a polyvinyl chloride pipe having an inner diameter of about 77 mm and a length of about 22 cm was set to about 20 mm from the tip.
mm, so that the critical surface tension is 70 dyn / cm,
Uses a ring-shaped electrode with a diameter of about 73 mm and a frequency of about 3
Corona discharge treatment was performed at 0 kHz and an output of 0.3 kW. Inside the pipe, looped back, the outside diameter was 0.8,
1250 hollow fiber membranes made of polysulfone having a cut-off molecular weight of about 20000 and a NCO content of 15% by weight
Using a potting material composed of a mixed solution of the polyol-modified 4,4-diphenylmethane diisocyanate with OH value of 850 mg-KOH / g of trimethylolpropane-based polyether polyol, the thickness of the potting portion is corona by centrifugal casting. After potting so that the length was equal to or less than the electric discharge treated length, the potting portion was cut at the tip of the pipe to open the hollow fiber. Next, a polyvinyl chloride header and a bottom were bonded to the ends by an adhesive for connecting a polyvinyl chloride pipe for water supply to connect them to produce a hollow fiber type cartridge filter. About 60 liters of hot water at about 60 ° C and about 20 liters of water at this filter
The flow was alternated for 1 hour each minute. Even when this heating and cooling was repeated 50 times, peeling did not occur between the potting material and the polyvinyl chloride cylindrical container.

The inner surface of one end of a polypropylene pipe having an inner diameter of about 60 mm and a length of 22 cm is about 15 m from the tip.
m, and corona discharge treatment was performed so that the critical surface tension was 70 dyn / cm. Inside the pipe folded back in a loop, the outer diameter was 0.5 and the average hole diameter of 0.8 mm was about 0.2.
Put 1700 micron polysulfone hollow fiber membranes,
The same potting material as in Example 1 was used to focus and fix the end portion subjected to the corona discharge treatment, and then the potting portion was cut at the tip of the pipe to open the hollow fiber. In this module, peeling did not occur even if the autoclave at 121 ° C. for 1 hour and the heating and cooling in which water was immersed at 20 ° C. for 30 minutes were repeated 10 times.

The critical surface tension of the portion (adhesion surface) that comes into contact with the potting material by corona discharge is 70 dyn / cm.
In the polypropylene storage container, the average pore size is 0.2μ
3400 hollow fiber membranes made of polysulfone having an inner diameter of 0.5 mm and an outer diameter of 0.8 mm and an NCO content of 15% by weight
After potting by a centrifugal casting method using a potting agent consisting of a mixed solution of the polyol-modified 4,4-diphenylmethane diisocyanate with OH and an OH value of 850 mg-KOH / g trimethylolpropane-based polyether polyol, the potting portion was cut off. The hollow fiber membrane was opened. Next, the contact surface 83 of the horn 82 and the fusion surface 8
The distance between 4 is 8 mm, the width of the fused surface is 3 mm, and the protrusion 85
The header 10 and the bottom 11 each having a bottom side of 0.6 mm and a height of 0.5 mm have a frequency of 20 KHz, a pressing force of 18 lbs / in 2 (124110 Pa), and a fusion time of 0.8.
It was fused to the storage container in seconds. This hollow fiber cartridge filter has a filtration rate of water of 3 kg / cm ² before and after a heat cycle test in which an autoclave treatment at 121 ° C. for 60 minutes and a treatment soaked in water at about 20 ° C. are repeated 10 times or more.
The diffusion flow rate of air in each is JIS-K383
1. The measurement was carried out by the method of JIS-K3833, but the filtration flow rate of water and the diffusion flow rate of air did not change, and no leakage occurred.

Outer diameter 89 mm, inner diameter 77 mm, length about 22
cm of chlorinated polyvinyl chloride pipe was cut at one end and made with chlorinated polyvinyl chloride.
mm, the angle of the wedge is 45 degrees, the width of the strip is 10 mm
With an outer diameter of 89 mm, an inner diameter of 77 mm,
A ring member having a total length of 25 mm was bonded using a commercially available adhesive (Sekisui Chemical Co., Ltd., heat resistant adhesive, No. 100). After the inner surface of the ring member was subjected to corona discharge treatment, this container was filled with a polysulfone hollow fiber membrane folded at the center, and one end was filled with a polyol-modified 4,4-diphenylmethane diisocyanate having an NCO content of 15% by weight and a small amount. The OH value obtained by adding a polypropylene oxide-modified polyol of ethylenediamine is 820 mg-KOH / g.
A urethane resin consisting of trimethylolpropane-based polyether polyol with a potting length of about 20
It was focused and fixed so as to have a size of mm. Next, the header made by cutting chlorinated polyvinyl chloride was bonded to the ring member, and the bottom was bonded to the end of the storage container with the above adhesive. In this hollow fiber type cartridge filter, peeling does not occur between the potting material and the ring member even when the heat cycle test in which hot water of about 90 ° C. and cold water of about 20 ° C. are alternately flowed for 30 minutes each time is repeated 100 times, No leak occurred.

Outer diameter 70 m with rectangular holes of about 3 mm square formed
A polypropylene extrusion-molded porous pipe with a length of 70 m and a length of about 70 cm is injection-molded with polypropylene at one end. The protrusion has a height of 3 mm, a wedge angle of 45 degrees, and a wedge-shaped protrusion with a width of 10 mm. Diameter 70 mm, inner diameter 6
A ring member having a length of 3 mm and a length of 20 mm was simultaneously brought into contact with a heater having a surface temperature of 270 ° C. for 10 seconds respectively by the method shown in FIG. After the corona discharge treatment on the inner surface of the ring member, it is filled with a polysulfone hollow fiber membrane,
Potting part with urethane resin consisting of trimethylolpropane-based polyether polyol having an OH value of 820 mg-KOH / g obtained by adding a polyol-modified 4,4-diphenylmethane diisocyanate having an NCO content of 15% by weight and a small amount of a polypropylene oxide-modified polyol of ethylenediamine. It was focused and fixed so that the length was about 15 mm. Then, a polypropylene injection-molded header was heat-sealed to the ring member, and the bottom was heat-sealed to the other end of the pipe in the same manner as above. In this hollow fiber type cartridge filter, peeling did not occur between the ring 23 and the potting material 5 even if the autoclave treatment at 121 ° C. for 60 minutes and the heat cycle test of soaking in water at about 20 ° C. for 30 minutes were repeated 50 times, No leak occurred.

[0100]

The water treatment apparatus of the present invention as described above is
The following remarkable effects are achieved.

According to the first aspect, the raw water is directly passed through the hollow fiber membrane of the prefilter to remove fine impurities and microorganisms from the raw water, and then the filtrate is sent to the filtration tank so that the microorganisms in the filtration tank are discharged. Can prevent clogging of the filter tank, and also remove residual chlorine, organic substances, harmful substances (eg trihalomethane), red rust, impurities, mold odor, etc. in the filter tank to improve water quality (pH, etc.). Adjustment, replenishment of minerals, and more effective magnetizing treatment and activation of water molecules by far-infrared irradiation, so delicious water can be obtained. In particular, since the prefilter has hydrophilicity imparted to the hollow fiber membrane and the minimum osmotic pressure is low, it can be immediately used by the normal water pressure of tap water. Further, since it is possible to backwash with the external pressure filtration type, when impurities are trapped on the outer surface of the hollow fiber membrane and the filtration performance is deteriorated, the backwashing removes impurities from the outer surface of the hollow fiber membrane and The function can be restored and the life of the water treatment device can be extended (3-5
Year) can be achieved. Further, in the filtration tank, the magnetic fields of the magnets arranged above and below the layer on which the granular ceramics are deposited combine with each other to reinforce each other, and moreover, because the direction is along the flow of water, water molecules are removed. Magnetization can be effectively performed, and since the magnetic field passes through the layer in which the granular ceramics are deposited, activation of water molecules by far infrared irradiation of the granular ceramics can be further enhanced. Further, the water treatment device of the present invention has heat resistance capable of treating not only drinking water and cooking water but also a large treatment flow rate and hot water of about 80 ° C., so that it can be used for hot water in a bath or shower. it can.

According to the second or third aspect, the potting material and the container for housing the hollow fiber membrane have a high adhesive strength, the adhesive portion does not peel off even after repeated heating and cooling, and the heat resistance is further excellent.

According to the present invention, after the potting material is cut, the storage container and the connecting member can be reliably joined together, and particularly when ultrasonic fusion is performed, the potting material and the hollow fiber membrane are thermally deformed. Can be joined without doing.

According to the fifth or sixth aspect, the adhesive strength of each member is high, and the case material itself has heat resistance. Particularly when the case material is polypropylene, chemical resistance,
It has characteristics such as safety and robustness.

According to claims 7 to 9, heat resistance, safety,
It is most preferable as a potting material because it satisfies all the characteristics of strength, chemical resistance, compatibility and cuttability.

According to the tenth aspect, the whole layer of the magnetite ore is magnetized by the magnetic field of the magnet, and the magnetic field is effectively applied to all the water molecules passing through the layer of the magnetite ore. be able to.

According to claim 11, it is arranged between the activated carbon layer and the second sand layer, between the first magnetite ore layer and the ceramic layer, and between the second magnetite ore layer and the barleystone layer. The magnetic field lines of the magnets are coupled with each other and reinforce each other, forming a strong magnetic field in the vertical direction, that is, along the flow of water, and
Since the entire first and second magnetite ore layers are strongly magnetized by the magnetic field, it is possible to effectively apply a magnetic field to water molecules when passing through the first and second magnetite ore layers, and
Since the magnetic field described above and the magnetic fields generated by the first and second magnetite ore layers magnetized by the magnetic field pass through the ceramic layer, activation of water molecules by far-infrared irradiation can be further enhanced.

According to the twelfth aspect, it is arranged between the second sand layer and the Taiseki stone layer, between the first magnetite layer and the ceramic layer, and between the ceramic layer and the second magnetite layer. Magnetic field lines of the magnets combine with each other to reinforce each other,
That is, a strong magnetic field is formed along the flow of water, and the magnetic field strongly magnetizes the entire first and second magnetite ore layers. As it passes, it can effectively apply a magnetic field to the water molecules,
In addition, the above-mentioned magnetic field and the first magnetized by this
Further, since the magnetic field generated by the second magnetite ore layer passes through the ceramic layer, the activation of water molecules by far infrared irradiation can be further enhanced.

According to the thirteenth aspect, it is arranged between the first sand layer and the activated carbon layer, between the Taiseki stone layer and the first magnetite ore layer, and between the second magnetite ore layer and the barley stone layer. The magnetic lines of force of the generated magnets are coupled with each other to reinforce each other, forming a strong magnetic field in the vertical direction of the entire filtration tank, that is, along the flow of water, and the magnetic fields also cause the first and second magnetite ores. Since the entire layer is strongly magnetized, it is possible to effectively apply a magnetic field to the water molecules as it passes through the entire filter tank, especially the first and second layers of magnetite ore. Since the magnetic fields of the magnetized first and second magnetite ore layers pass through the ceramic layer, the activation of water molecules by far-infrared irradiation can be further enhanced.

According to the fourteenth aspect, the magnetic field generated by the magnets arranged between the layers becomes uniform, and the water molecules are more effectively activated by the magnetizing treatment of the water molecules and the far infrared irradiation of the granular ceramics. Done.

According to the fifteenth aspect, a substantially uniform magnetic field can be generated over the entire layer, and the water molecule is magnetized and the far-infrared irradiation of the granular ceramic is more effectively activated.

According to the sixteenth aspect, the magnetization treatment of water molecules and the activation of water molecules by far-infrared irradiation of the granular ceramic are more effectively performed.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a partial cross section of a water treatment device of the present invention.

FIG. 2 is a front view showing a partial cross section of a hollow fiber type cartridge filter used in the present invention.

FIG. 3 is a cross-sectional view showing a typical embodiment of the filtration tank used in the present invention.

FIG. 4 is an exploded perspective view of a magnet plate.

FIG. 5 is a sectional view showing another embodiment of the filtration tank.

FIG. 6 is a sectional view showing still another embodiment of the filtration tank.

FIG. 7 is a schematic cross-sectional view showing another example of a hollow fiber cartridge filter, (a) is an example in which a ring member having wedge-shaped protrusions is heat-sealed to the end of a porous cylindrical container, (b) is An example of the same adhesion is shown.

FIG. 8 is an explanatory diagram showing a method for heat-sealing a porous cylindrical container and a ring member.

FIG. 9 is an explanatory view showing a method for forming wedge-shaped projections by heating / pressurizing the tip of a porous cylindrical container.

10A and 10B are explanatory diagrams in which an air vent is provided when the potting material is bonded to the wedge-shaped protrusions, FIG. 10A shows a structure in which a through hole is penetrated, and FIG. 10B shows a structure in which a notch is provided.

FIG. 11 is a graph showing the relationship between the NCO content and the maximum tensile strength when the OH value is constant.

FIG. 12 is a graph showing the relationship between the OH value and the maximum tensile strength when the NCO content is constant.

FIG. 13 is a partial cross-sectional view showing a part of an apparatus for performing corona discharge treatment on the bonding surface of the wedge-shaped protrusions provided on the inner circumference of the storage container, where (a) shows the case where a ring-shaped electrode is used. (B) shows the case where a linear electrode is used.

FIG. 14: X of polyvinyl chloride surface before corona discharge treatment
It is a wide spectrum obtained by line electron spectroscopy.

FIG. 15: X of polyvinyl chloride surface after corona discharge treatment
It is a wide spectrum obtained by line electron spectroscopy.

FIG. 16: X on polypropylene surface before corona discharge treatment
It is a wide spectrum obtained by line electron spectroscopy.

FIG. 17: X on polypropylene surface after corona discharge treatment
It is a wide spectrum obtained by line electron spectroscopy.

FIG. 18 is a side view showing a partially broken view of the relationship with a horn that is a member for transmitting ultrasonic energy when the header is ultrasonically fused to the end of the porous cylindrical container.

FIG. 19 is a cross-sectional view showing a header before ultrasonic welding.

[Explanation of symbols]

 A main body case B pre-filter B1 hollow fiber cartridge filter B2 loading case 1 base member 2 cover 3 mounting base 4 mounting base 5 through hole 6 through hole 7 leg 8 lower opening 9 storage container 9a porous cylindrical container 10 header 11 bottom 12 Hollow Fiber Membrane 12a Straight Part 12b Loop Part 13 Potting Material 14 Wedge-Shaped Protrusion 15 Adhesive Surface 16 Introduction Hole 17 Flow Path 18 O-ring 19 Outer Cylinder 20 Upper Lid 21 O-ring 22 Clamping Tool 23 Bottom 24 Inlet Pipe 25 Mouth 26 Inflow Hose 27 Cylindrical part 28 Rib 29 Outflow pipe 30 Connection hose 31 Base 32 Housing 33 Filter tank body 34 Cap 35 Inflow pipe 35a Inlet 36 Base 36 Bottom 38 Outflow pipe 38a Outlet 39 Base 40 Outflow hose 41 First sand layer 42 Activated carbon Layer 43 second Sand layer 44 Taiseki stone layer 45 First magnetite ore layer 46 Ceramic layer 47 Second magnetite ore layer 48 Bourneishi layer 51 Perforated filter 52 Nonwoven filter 53 Partition net 60-1, 60-2, 60-3 Magnet plate 61 Magnet 62 Spacer 62a Storage Hole 63 Magnetic Field 70 Ring Member 71 Joining Part 72 Joining Part 73 Joining Surface 74 Heater 75 Right Core 75a Wedge Type 76 Left Core 76a Wedge Type 77 Female 78 Through Hole 79 Cutout 80 Ring Electrode 81 Linear Electrode 82 Horn 83 Contact Surface 84 Fusion Surface 85 Protrusion

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical indication location C02F 1/48 C02F 1/48 A 1/68 510 1/68 510B 520 520P 520V 530 530B 540 540A 540B 540D 540F 540Z

Claims (16)

[Claims] 1. A water treatment device comprising a pre-filter and a filtration tank, wherein the pre-filter is folded back into a loop at the center in a storage container made of a thermoplastic resin having a wedge-shaped protrusion formed on the inner surface at one end. When a plurality of hollow fiber membrane bundles are housed and the open ends of the hollow fiber membrane bundles are focused and fixed to the protrusions with a potting material made of thermosetting resin, the adhesion surface of the protrusions with the potting material is preliminarily critical. Corona discharge treatment is performed so that the surface tension is 40 dyn / cm or more, hydrophilicity is further imparted to the hollow fiber membrane, and an external pressure filtration type backwashable hollow fiber type filter is used. Granular activated carbon, sand, etc. are deposited in layers in a cylindrical housing having water inlets and outlets at the ends, and at least 1 layer is provided above and below the layer in which the granular ceramics are deposited. The magnets are arranged such that the directions of their magnetic lines of force coincide with each other and the directions are along the flow of water, and after filtering the raw water with the pre-filter, the filtrate is filtered by the filtration tank and activated. A water treatment device characterized by: 2. The storage container at one end of a perforated cylindrical container,
The water treatment device according to claim 1, wherein a ring having wedge-shaped protrusions is adhered, heat-sealed, or ultrasonically welded on the inner surface. 3. The water treatment apparatus according to claim 1, wherein the storage container is one in which a wedge-shaped protrusion is formed on the inner surface by heating one end of a porous cylindrical container to a temperature equal to or higher than a thermal deformation temperature and then pressure-molding the container. . 4. The connection member for forming a fluid passage is adhered, heat-sealed, or ultrasonic-sealed to at least one end of the storage container on the potting material side. Water treatment equipment. 5. The water treatment device according to claim 1, wherein the storage container is made of polypropylene or polyvinyl chloride. 6. The water treatment device according to claim 4, wherein the connection member is made of polypropylene. 7. The potting material has an NCO content of 1
A urethane resin obtained by curing a mixed solution of 3 to 18% by weight of an aromatic polyisocyanate added in a stoichiometric amount of 100 to 105% to a polyether polyol having an OH value of 700 mg-KOH / g or more. Item 1. The water treatment device according to item 1. 8. The viscosity of the mixed solution is 2000 to 8000 cp.
The water treatment device according to claim 7, which is s. 9. The water treatment device according to claim 1, wherein the potting material has a maximum tensile stress at 120 ° C. of 30 to 200 kg / cm ² and an elongation at break of 10% or more. . 10. The water treatment apparatus according to claim 1, wherein a layer of magnetite ore is provided on at least one of the upper and lower sides of the layer of granular ceramics. 11. The filtration tank is formed by depositing sand, granular activated carbon, sand, taiseki stone, magnetite ore, granular ceramics, magnetite ore and barley stone in layers from the top to form a first sand layer, an activated carbon layer and a first layer. The second sand layer, the Taiseki stone layer, the first magnetite layer, the ceramic layer, the second magnetite layer and the barley stone layer are formed, and the first magnetite layer is between the activated carbon layer and the second sand layer. And at least one magnet between the ceramic layer and the second magnetite ore layer and the barley stone layer, respectively, so that the directions of their magnetic lines of force coincide with each other and the directions are along the flow of water. The water treatment device according to claim 1. 12. The filtration tank is formed by depositing sand, granular activated carbon, sand, taiseki stone, magnetite ore, granular ceramics, magnetite ore and barley stone in layers from the top to form a first sand layer, activated carbon layer, and The second sand layer, the Taiseki stone layer, the first magnetite ore layer, the ceramic layer, the second magnetite ore layer and the barley stone layer are formed, and the first magnetite ore is formed between the second sand layer and the Taiseki stone layer. Between the ceramic layer and the ceramic layer, and between the ceramic layer and the second magnetite layer, at least one magnet is arranged such that the magnetic lines of force thereof are aligned with each other and the direction is along the flow of water. The water treatment device according to claim 1. 13. The above-mentioned filtration tank deposits sand, granular activated carbon, sand, taiseki stone, magnetite ore, granular ceramics, magnetite ore and barley stone in layers from the top to form a first sand layer, activated carbon layer, and 2 sand layers, Taiseki stone layer, 1st magnetite ore layer, ceramic layer, 2nd magnetite ore layer and barley stone layer are formed, and between the 1st sand layer and activated carbon layer, Taiseki stone layer and 1st layer Between the second magnetite layer and the second magnetite layer, and at least one magnet is arranged so that the directions of the lines of magnetic force thereof coincide with each other and the direction is along the flow of water. The water treatment device according to claim 1, which is a water treatment device. 14. The water treatment device according to claim 11, wherein at least one magnet arranged between the layers has substantially the same distance in a direction orthogonal to each layer. 15. A magnet arranged between layers, wherein at least two magnets arranged at positions equally dividing a central angle on the same circle centered on the central axis of the housing are used. Item 15. The water treatment device according to any one of items 1, 10, 11, 12, 13 and 14. 16. The method according to claim 1, wherein the direction of magnetic force lines of the magnet and the direction of water flow are reversed.
14. The water treatment device according to either 14 or 15.