JP2006281216A - Water purification device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water purification device using hydroxyapatite or ceramic, activated carbon and a hollow fiber membrane as filter media to effectively eliminate chlorine, trihalomethanes, agrochemicals, dissolved ionic harmful substances, bacteria, and particularly lead contained in raw water for city water etc., thus providing safe and nice water. <P>SOLUTION: The water purification device comprises a first water purification tank filled with filter media including the activated carbon and at least either hydroxyapatite particles or ceramic particles and a second water purification tank filled with filter media of a porous hollow fiber membrane and installed at the downstream of the first water purification tank. Alternatively, the first water purification tank is installed upright and the raw water is made to flow from below to above, or the first water purification tank is provided with a pre-filter and uses an ion exchange resin together with the above filter media. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a water purifier that removes substances that impair the safety and taste of water.

  Activated carbon adsorbs and removes residual chlorine contained in tap water, so in activated water purifiers for the purpose of purifying tap water, activated carbon is used as a filter material. When the water flow is stopped for a long time after use, there is a problem that germs propagate in the activated carbon layer and the germs flow out when the water flow is resumed.

In addition, since the porous hollow fiber membrane can capture bacteria by membrane filtration, there is also known a water purifier that uses a porous hollow fiber membrane in combination with activated carbon as a filtering material and has no problem of outflow of germs. Even in water purifiers that use such activated carbon and porous hollow fiber membranes as filter media, dissolved ionic harmful substances such as cations of heavy metals such as lead and anions such as nitrate nitrogen and nitrite nitrogen that are eluted from water supply pipes The current situation is that it is hardly effective for removing substances.

  The object of the present invention is to effectively remove chlorine, trihalomethane, agricultural chemicals, dissolved ionic toxic substances, bacteria, etc. contained in raw water such as tap water, using hydroxyapatite or ceramics, activated carbon and hollow fiber membranes as filtration media. Another object is to provide a water purifier that obtains safe and delicious water.

  The present invention relates to a purified water comprising a first water purification tank filled with at least one of hydroxyapatite particles and ceramic particles and activated carbon as a filtering material, and a second water purification tank disposed downstream thereof and containing a porous hollow fiber membrane as the filtering material. Or the first septic tank is erected in the vertical direction and water is passed from the lower side to the upper side of the septic tank, or the first septic tank is provided with a prefilter and an ion exchange resin is used in combination. There is a water purifier.

  The water purifier case includes a first water purification tank filled with at least one of hydroxyapatite particles and ceramic particles and activated carbon as a filter medium, and a second water purification tank disposed downstream thereof and containing a porous hollow fiber membrane as the filter medium. A water purifier having a raw water inlet at the bottom of the case that is rotatable in the horizontal direction communicating with the first water purification tank and that can be connected to a hose, and has a water pressure in the primary filtrate flow path downstream of the first water purification tank. A flow path switching pressure valve that can be opened and closed by the valve, and the flow path formed by closing the valve communicates with the primary filtered water inlet of the second water purification tank via a constant flow valve, flow rate detection means, preferably a flow rate sensor, It exists in the water purifier provided with the discharge port of the secondary filtrate from the 2nd water purification tank which provided the discharge port connection tool rotatable in the horizontal direction at the upper part of the case.

  The water purifier of the present invention can obtain safe and delicious water from which chlorine, trihalomethane, agricultural chemicals, dissolved ionic harmful substances, bacteria, etc. contained in raw water such as tap water are effectively removed, Since the flow rate can be stabilized and the life of the filter medium can be detected, it is easy to always maintain stable filtration efficiency. In addition, the water purifier of the present invention can reduce the restrictions on the installation place and improve the handling property because the water outlet attached to the water purifier raw water inlet and the outlet connector can be rotated in the horizontal direction. It has been done.

  The present invention is described in detail below. The water purifier of the present invention includes a first water purification tank and a second water purification tank disposed downstream thereof, and the first water purification tank is filled with hydroxyapatite particles and / or ceramic particles and activated carbon as a filter medium. And the hollow fiber membrane is accommodated in the 2nd water purification tank as a filter medium.

  In the first water purifier of the water purifier of the present invention, chlorine, trihalomethane, dissolved ionic toxic substances, agricultural chemicals, etc. are removed with hydroxyapatite particles and / or ceramic particles and activated carbon, and in the second water purifier, a hollow fiber membrane Remove bacteria and fine harmful substances.

  The hydroxyapatite particles used in the first water purification tank of the water purifier of the present invention are inorganic substances mainly composed of calcium phosphate, preferably 200 to 20 mesh particles, and the hydroxyapatite particles are heavy metals such as lead. By using hydroxyapatite particles that are extremely excellent in cation adsorption, safer filtered water can be obtained.

  Moreover, examples of the ceramic particles include fluorite, synthetic fluorite ceramics, alumina ceramics, silica ceramics, and the like. In particular, synthetic fluorite ceramics are porous and thus have an excellent ability to adsorb heavy metals. Of these ceramics, particles having a particle size of 200 to 20 mesh are preferably used. In particular, molecular sieve 5A is preferably used because of its excellent adsorption of heavy metal cations such as lead. By using ceramic particles together with activated carbon, extremely delicious filtered water can be obtained.

  In addition, the activated carbon used in the water purifier of the present invention is not particularly limited, and may be normally used in water purifiers, such as natural activated carbon such as coconut shell, bone, wood, pitch system, petroleum coke system, resin Alternatively, synthetic activated carbon such as rubber is used, and activated carbon may be activated by an arbitrary method such as a steam activation method or a chemical activation method. Moreover, any form, such as a powder form, a granular form, and a fibrous form, may be sufficient. Furthermore, the activated carbon may be attached with an antibacterial metal such as silver by plating or the like. Activated carbon removes residual chlorine in raw water and adsorbs harmful substances such as trihalomethane and agricultural chemicals.

  In the first water purification tank of the water purifier of the present invention, the hydroxyapatite particles or ceramic particles and activated carbon may be filled as a mixture in the tank as long as the packed bed is passed through, or each layered. It may be filled.

  In the water purifier of the present invention, a porous hollow fiber membrane is used as a filter medium in the second water purification tank, but the porous hollow fiber membrane used in the water purifier of the present invention is a porous material that can be normally used in a water purifier. The hollow fiber membrane is not particularly limited, and a polyolefin fiber such as polyethylene, a polysulfone hollow fiber membrane or the like is used, and a hydrophilic such as ethylene-vinyl alcohol copolymer, polyvinyl alcohol, polyvinyl pyrrolidone, etc. It is preferable that the hollow fiber membrane is hydrophilized in order to improve water permeability.

  Each water purification tank in the present invention may be provided with a prefilter on both or one side, and an ion exchange resin, natural stone, or the like may be used in combination with the filter medium to be used.

  Furthermore, the water purifier of the present invention is rotatable in the horizontal direction communicating with the first water purifier at the lower part of the water purifier case provided with the first water purifier and the second water purifier disposed downstream thereof, and raw water. A raw water inlet that can be connected to a hose that supplies water is provided.

  The primary filtered water flow path downstream of the first water purification tank is provided with a flow path switching pressure valve that can be opened and closed by water pressure, and the flow path formed by closing the pressure valve by passing water is a fixed path provided in the middle of the flow path. It communicates with the primary filtered water inlet of the second water purification tank via the flow rate valve and the flow rate detection means. In a state where the water flow is stopped, the residual water is drained out of the water purifier from a drain hole provided in an arbitrary part of the bottom of the water purifier from the flow path formed by opening the pressure valve.

  In addition, a discharge port connector that is rotatable in the horizontal direction for discharging the secondary filtrate from the second water purification tank is provided at the upper part of the water purifier case downstream of the second water purification tank, and is directly connected to or attached to this. Equipped with a discharge outlet attached by such means.

  In the water purifier according to the present invention, the horizontally movable raw water introduction port and the discharge water port attached to the horizontally movable discharge water port connector are rotatable in the horizontal direction, so that the degree of freedom in the hose connection direction and the discharge direction is given. .

  In the water purifier of the present invention, the raw water is supplied from a water supply flow path switching valve that is detachably attached to the faucet faucet, is supplied to the raw water inlet at the lower part of the water purifier by a hose, and is filtered by the first water purifier. The primary filtered water passes through the primary filtered water channel formed by the blockage by the water pressure of the channel switching pressure valve provided in the channel downstream of the first water purification tank, A constant flow valve provided in the middle of the flow path leading to the second water purification tank, the flow rate detecting means, the primary filtered water introduction port of the second water purification tank, and the hollow fiber membrane of the filter material of the second water purification tank is out-in or Water is passed in and out, and this secondary filtered water is discharged as filtered water from a discharge port attached to a discharge port connector that is rotatable in the horizontal direction above the water purifier.

  The flow rate detection means between the first water purification tank and the second water purification tank in the water purifier of the present invention is for detecting the life of the filter medium based on the water flow rate. A flow valve and pressure switch are used, but preferably a flow sensor is used. The flow rate sensor is preferably provided downstream of the constant flow valve that makes the variable flow rate due to a change in water pressure constant. The constant flow valve prevents variations in filtration efficiency by setting a constant flow rate. If the flow rate detecting means is provided upstream of the first water purification tank, it is difficult to detect a satisfactory flow rate due to pressure loss due to the filtering material of both the first water purification tank and the second water purification tank.

  As the flow rate sensor, an impeller type flow rate sensor is more preferably used in terms of accuracy of flow rate integration. The flow rate sensor integrates the flow rate and generates an output signal when the set integrated flow rate is reached. The output signal from the flow rate sensor is purified by any alarm display control means such as lighting, flashing or sound. Inform the life of filter media of the vessel.

  Since the porous hollow fiber membrane of the filter material of the second water purification tank performs microfiltration of bacteria and the like compared with the filter material of the first water purification tank, the porous hollow fiber membrane of the filter material of the second water purification tank captured it. The filter life due to clogging of the pores with bacteria will determine the filter life of the filter material of the water purifier, so the filter service life of the porous hollow fiber membrane of the filter material of the second water purification tank is detected based on the integrated flow rate. It is extremely meaningful to maintain the filtration effect in the water purifier.

  The present invention will be described with reference to embodiments shown in the drawings. FIG. 1 is a cross-sectional view of an example of the water purifier of the present invention, where 1 is a water purifier case, 2 is a first water purifier, 3 is a resin frame, 4 is a filter medium (hydroxyapatite or ceramics / activated carbon), and 5 is Resin frame, 6 is a horizontally movable raw water introduction port, 7 is a second water purification tank, 8 is a filter medium (porous hollow fiber membrane), 9 is a flow sensor, 10 is a display control unit, 11 is a discharge water port, and 12 is a display. Battery box for control, 13 is a constant flow valve, 14 is a switchable channel tube, 15 is a channel switching pressure valve, 16 is a faucet faucet, 17 is a water supply channel switching valve, 18 is a hose, and 19 is horizontally movable A discharge port connector is shown.

  The first water purification tank 2 has a structure in which a water pipe is provided at the center and raw water that has passed through the water pipe from below passes the filter medium 4 downward from above, and the water pipe and the inside of the tank are closely separated by an O-ring. A resin frame 5 with a 150 mesh nylon mesh attached is provided at the bottom, a mixture of 250 g of hydroxyapatite particles and 450 g of activated carbon is filled as a filter medium 4, and a resin frame 3 with a nylon mesh similar to the above is provided at the top. .

  Hydroxyapatite particles are obtained by pulverizing crystals obtained by firing with a pulverizer and using mixed particles of 100 mesh and 48 mesh particle sizes. Kuraray Chemical T-SB48 / 100 manufactured by Kuraray Chemical Co., Ltd. is used as the activated carbon. It was.

  The second water purification tank 7 is fixed with a two-component polyurethane resin with a polyethylene porous hollow fiber membrane made hydrophilic as a filter material 8 with its end kept open, and stored in the tank. However, it was set as the structure which allows the filter medium 8 to pass water by an out iron.

  A switchable flow path pipe 14 having a flow path switching pressure valve 15 is provided downstream of the first water purification tank 2, and the flow path toward the second water purification tank 7 formed by opening and closing the flow path switching pressure valve 15 is 4 liters / The minute constant flow valve 13 and the impeller flow sensor 9 were provided. A horizontal movable raw water inlet 6 for supplying water to the first water purification tank 2 is provided at the lower part of the water purifier 1, and a horizontal movable discharge water outlet connector 19 is provided at the upper part of the water purifier case 1 to supply filtered water from the second water purification tank 7. The discharge water port 11 to be discharged was inserted.

  The water test results of this water purifier are shown below. The water pressure was set at 2 kg / cm 2, the time when the integrated flow rate by the flow rate sensor was 8 m 3 was set as the filter media life, and the indicator lamp was turned on by a signal from the flow rate sensor.

  (1) Residual chlorine removal capacity 2.0 ± 0.2ppm Residual chlorine-containing water was passed through and the residual chlorine concentration of filtered water was measured by the o-tolidine method. The concentration was 0.01 ppm or less.

  (2) Sterile capacity Pseudomonas diminuta IFO 14213 Water containing 1.7 × 10 7 cells / milliliter was passed through 6 liters, and the number of bacteria in the filtrated water was measured. there were.

  (3) Lead removal ability As a lead concentration, 150 ppb of lead chloride aqueous solution was passed through, and the lead concentration of filtrated water when 8 m3 was passed through was measured. The lead concentration of filtrated water was 5 ppb or less.

  (4) Trihalomethane removal ability An aqueous solution prepared with 60 ppb of chloroform was passed through, and the chloroform concentration of filtered water was measured when 8 m 3 was passed through. The chloroform concentration of filtered water was 5 ppb or less.

  (5) Filter media lifetime display The lifetime of the filter media of the water purifier was confirmed using a commercially available integrated flow meter. The measured cumulative flow rate at the time of the lifetime display was 7.88 m 3.

  Further, a mixture of ceramic particles and activated carbon is used in place of the filter medium 4 of the first water purification tank, and a rod-shaped molecular sieve 5A having a diameter of 1 mm and a length of 2 to 5 mm made by Union Showa is pulverized as ceramic particles. A water purifier using a mixed particle having a particle size of 100 mesh and 48 mesh pulverized and classified by a vessel was tested, and the same excellent results as described above were shown.

It is sectional drawing of the example of the water purifier of this invention.

Explanation of symbols

1 Water purifier case 2 1st water purification tank 4 Filter material (hydroxyapatite or ceramics / activated carbon)
6 Horizontal movable raw water inlet 7 Second water purification tank 8 Filter material (porous hollow fiber membrane)
9 Flow sensor 11 Discharge water port 13 Constant flow valve 14 Switchable flow channel 15 Flow channel switching pressure valve 19 Horizontal movable discharge water port connector

Claims (3)

  A water purifier comprising a first water purification tank filled with at least one of hydroxyapatite particles and ceramic particles and activated carbon as a filter medium, and a second water purification tank disposed downstream thereof and containing a porous hollow fiber membrane as the filter medium.   The water purifier according to claim 1, wherein the first septic tank is erected in the vertical direction and water is passed from below to above the septic tank.   The water purifier according to claim 1 or 2, wherein a prefilter is provided in the first septic tank and an ion exchange resin is used in combination.

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