JPH11207391A - Water purifying and treatment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water purifying and treatment device capable of obtaining a purified water having a cleanness in a level usable as a medical water even if river water, lake water, sea water, irrigation water, etc., are used as a raw water. SOLUTION: One or more magnetic treating means 7 are provided at a piping route 3 from an intake of the water purifying treatment device in which plural filter means such as coarse filter, precision filter and reverse osmotic membrane filter 13 and various kinds of pumps are combined and subjected to coupled piping to the reverse osmotic membrane filter 13, and magnetic field is applied to a passing water to subject the passing water to the magnetic treatment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to river water, lake water,
The present invention relates to a water purification treatment apparatus capable of directly obtaining purified water that can be used for medical use directly from raw water such as seawater or irrigation water. In particular, purified water obtained by the water purification treatment device according to the present invention has a level of cleanliness that can be used for adjustment of artificial dialysis water.

[0002]

2. Description of the Related Art Securing clean water means securing a human lifeline, making it possible for citizens to maintain a smooth daily life, and preventing stagnation in industrial activities. Various fields, such as a field of the electronics industry and a field of chemical chemistry, can be considered as fields that require highly clean water. Above all, water used for medical treatment is not tolerable to decrease the cleanliness of water as it relates to human life.

In general, relatively clean water such as tap water and well water is used as raw water for obtaining water used for medical purposes. For example, purified water used for artificial dialysis is pyrogen-free water, i.e., completely removed biologically active substances derived from microorganisms such as endotoxin and glucan, which are microbial contaminants. The stock solution as an electrolyte concentrate is diluted and mixed to prepare water for artificial dialysis. A large-scale purification treatment apparatus is used to treat and purify the purified water without fear of contamination.

However, in the event of a disaster such as an earthquake or a large-scale fire, in the stricken area, the water supply is cut off due to the rupture of water pipes.
Damage to the water purification facility makes it difficult to obtain tap water and well water with relatively low pollution such as tap water and well water to obtain water of a level that can be used for medical treatment, and it is possible to obtain purified water stably. It can be assumed that it will not be possible.

[0005] Further, many purification treatment apparatuses for obtaining water at a level that can be used for medical purposes are generally large and cannot be loaded on a moving body such as a truck.
On the other hand, those that are small and can be used at the laboratory level are:
Water purification treatment capacity is poor, and it is unreasonable that a large amount of medical water is needed in the event of a disaster.

[0006]

Therefore, the present invention is applicable to a case where river water, lake water, seawater, irrigation water, etc., which are highly contaminated and are not generally used as raw water for medical treatment, are used as raw water. It is an object of the present invention to provide a water purification treatment apparatus capable of obtaining purified water having a degree of cleanliness that can be directly used as target medical water from natural raw water.

[0007] Further, the water purification treatment apparatus according to the present invention comprises:
The aim is to provide a water purification treatment device that can be made small enough to be mounted on a moving body such as a truck.

[0008]

A water purifying apparatus according to the present invention is a water purifying apparatus capable of directly obtaining purified water that can be used as medical water from raw water,
It consists of a plurality of filtration means, a coarse filter, a microfilter, a reverse osmosis membrane filter, an activated carbon filter, an ultrafilter, and various pumps connected to each other. One or more magnetic processing means are provided in the piping route from the water intake to the reverse osmosis membrane filter out of the entire purification path to the discharge port, and the magnetic processing means flows into the reverse osmosis membrane filter. The method is characterized in that a magnetic field is applied in advance to the passing water before the magnetic treatment.

Among the filtration means, the coarse filter is used for the purpose of first filtering raw water pumped from a water intake port by a water intake pump and removing relatively large foreign substances contained in the raw water. As the coarse filter, a so-called rapid filter or high-speed filter is used. As used herein, the term "rapid filter" refers to a filter using anthracite and sand as a filter medium, and the term "high-speed filter" refers to a filter using a special fiber filter made of vinylidene chloride or the like. In actual use, either a quick filter or a high-speed filter is selectively used. It is conceivable to use a combination of a rapid filter and a high-speed filter. However, there is no large difference in filtration effect between the case where each is used alone and the case where these two filters are used together.

The microfiltration device is provided with a plurality of hollow cylindrical filter members having side walls made of a filter cloth capable of removing foreign matters having a diameter of at least 5 μm inside a casing made of metal or transparent plastic. The filter is a typical example of a filter in which the passing water flows from the outside of the cylindrical filter member and is filtered toward the hollow inside of the filter medium through the side wall of the cylindrical filter member. There are no restrictions. Using this microfilter, at least 5
By removing foreign substances larger than μm, damage to a pump disposed on the secondary side of the microfilter and a reverse osmosis membrane of a reverse osmosis membrane filter can be prevented and protected. When a transparent plastic casing is used, the flow of the solution can be easily visually checked from the outside, and the timing for replacing the filter can be easily determined.

[0011] Reverse osmosis membrane filters are used for the purpose of removing impurities and contaminants in the passing water. The filtration by the reverse osmosis membrane filter determines whether or not purified water having a cleanliness that can be used as medical water can be directly obtained. As the reverse osmosis membrane filter, any commonly used type such as a spiral type and a hollow fiber type can be used.

[0012] In order to maximize the performance of the reverse osmosis membrane filter, impurities or contaminants contained in concentrated wastewater discharged from the reverse osmosis membrane generated as the filtration progresses adhere to the surface of the reverse osmosis membrane. Need to be prevented. In particular, as in the present invention, when considering the use of river water, lake water, seawater, irrigation, and the like as raw water, the progress of contamination of all filters is fast, and the cost of reverse osmosis membrane filters is particularly high. Extending the life of the reverse osmosis membrane greatly contributes to a reduction in running cost.

The present inventor has proposed that to extend the life of a reverse osmosis membrane,
The inventor considered that a magnetic field was applied to the passing water flowing into the reverse osmosis membrane filter in advance to perform magnetic treatment, thereby preventing impurities or contaminants from adhering to the reverse osmosis membrane surface. The magnetic processing means will be described later in detail.

The activated carbon filter is used for deodorizing and decolorizing passing water and removing adsorbed contaminants, and any type of activated carbon that can be used in a solution according to the target processing capacity. Anything can be used.

At this time, if an ion exchange filter, which is a filter filled with an ion exchange resin, is used after the treatment of the activated carbon, it is possible to effectively remove the impurity ions remaining in the passing water.

In the present invention, it is preferable to use an ultrafilter as the final filtration. This is because this ultrafilter can finally remove trace impurities, foreign substances, bacteria, organic contaminants and the like mixed in the passing water. Purified water is obtained by successively treating with the various filters described above.

The water purification apparatus according to the present invention is provided with the magnetic treatment means because the passing water is subjected to magnetic treatment to thereby remove impurities and pollutants contained in the raw water. It is possible to reduce the adhesion to the inside and the adhesion of impurities and contaminants contained in the concentrated wastewater discharged from the reverse osmosis membrane generated as the filtration proceeds in the reverse osmosis membrane filter to the reverse osmosis membrane surface. It is.

The magnetic processing means according to the present invention includes a method of arranging a so-called magnet around a pipe, a method of arranging a magnet in passing water in a pipe, and a method of enclosing a pipe around an energized coil and applying a magnetic field by energizing the pipe. Various methods can be adopted. Above all, it is desirable to use a magnet in consideration of reduction of running cost. As the magnet used at this time, any magnet such as a normal ferrite, an alloy represented by a spinodal type, and a rare earth magnet can be used. The required magnetic force varies depending on the desired purification capacity, flow rate, pipe cross-sectional area, etc., and as a result of various studies, the proposed water purification apparatus of the present invention has a magnetic force of 60%.
A sufficient magnetic processing effect could be obtained if the magnetic force was at least 00 Gauss.

The magnetized water retains its magnetized effect for a certain period of time after passing through the magnetic field. This magnetized effect is as follows. Impurities and contaminants present in raw water exist in water in ionic, molecular, suspended, and the like. The interface between these surfaces and water is constituted by a double ion layer composed of an ion adsorption layer and an ion diffusion layer surrounding the ion adsorption layer. The potential difference between the ion-adsorbing layer and the ion-diffusion layer is called zeta potential, and a phenomena occurs in which the zeta potential decreases when subjected to porcelain treatment.

When the zeta potential decreases, the potential difference between the inner wall of the pipe and the surface of the reverse osmosis membrane and the water decreases, and the solid existing in the water having a larger total surface area than the adsorption on the inner wall of the pipe and the surface of the reverse osmosis membrane. Adsorption to particles, molecules, and the like is promoted, crystallization proceeds in water, and gradually coarsens, until precipitates of impurities and contaminants are formed. The fact that these precipitates are formed means that impurities and contaminants can be easily removed by a filter, and that the adhesion of impurities and contaminants to the inner wall of the pipe and the surface of the reverse osmosis membrane can be effectively performed. It can be prevented and reduced.

Based on the above, in the water purification treatment apparatus according to the present invention, the position where the magnetic treatment device as the magnetic treatment means is attached is considered as follows.
Considering the prevention of scale adhesion of impurities and contaminants,
It is better to install it closer to the intake. On the other hand, in consideration of the prevention of adhesion of impurities and contaminants on the reverse osmosis membrane, it is desirable to mount the filter at a position closer to the reverse osmosis membrane filter. Therefore, depending on the device, not only a single magnetic processing device but also a structure having a plurality of magnetic processing devices can be used to make the inside of the pipe of the purification processing device longer than a single magnetic processing device. In addition, the reverse osmosis membrane can be kept clean.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a specific embodiment of the present invention will be described, and the water purification apparatus according to the present invention will be described in detail.

First Embodiment FIG. 1 shows a flow of water purification processing by a water purification apparatus 1 according to a first embodiment. In the purification process of the raw water 2, the raw water 2 passes through a path 3 through which the raw water 2 flows from left to right in FIG. 1, and the raw water 2 is purified by various filters disposed in the path. Therefore, the following description will be made in the order of the purification process.

A strainer 5 is attached to the water intake port 4, and a liquid from which bulky debris has been removed from the raw water 2 is taken in by a water intake pump 6 through a path 3 and sent to a magnetic processing device 7 as a first purification device. In this case, seawater was used as the raw water 2, and the magnetic treatment device 7 used was a type in which a rare earth magnet having a magnetic force of 6,500 gauss was arranged around the piping.

The liquid that has passed through the magnetic processing device 7 is applied with an appropriate pressure by a pressure pump 8 and supplied to a high-speed filter 9 which is the next filter. The high-speed filter 9 is filled with a resin filter medium 10, which is made of vinylidene chloride and capable of capturing fine particles having a particle diameter of 25 microns or more. .

Next to the high-speed filter 9, there is provided a microfilter 11, which is used to remove fine particles having a particle size of 5 microns or more in the liquid having passed through the high-speed filter 9. It is. This microfilter 11 is the next high pressure pump 1
2 and also serves to protect the reverse osmosis membrane filter 13.

The high-pressure pump 12 is for applying a pressure exceeding the osmotic pressure. Dissolved ionic substances, microorganisms, Escherichia coli and other general bacteria, their dead bodies (debris), and organic impurities including pyrogen were removed. The spiral osmosis membrane used here was a spiral type.

An activated carbon filter 14 was provided on the secondary side of the reverse osmosis membrane filter 13. A conductivity sensor 15 and an automatic three-way valve 16 are arranged in the path 3 between them. The liquid (permeated water) passed through the reverse osmosis membrane filter 13 was guided to the activated carbon filter 14, and the activated carbon filter 17 was used to adsorb organic substances, glucan, and other contaminants.

On the secondary side of the activated carbon filter 14, an ultrafilter 18 is provided as a final purifier. Here, as a final treatment, a very small amount of fine particles, colloidal substances, pyrogens and other organic impurities which may remain in the liquid passed through the activated carbon filter 14 are removed.

On the secondary side of the ultrafilter 18, a take-out port 19 for taking out purified water passed through the ultrafilter 18 and a washing / draining passage 20 are provided. The properties of the purified water thus obtained are as shown in FIG. When the magnetic treatment device 7 is not provided, chemical cleaning of the reverse osmosis membrane is required about three months from the start of operation, whereas in the present embodiment, chemical cleaning is not required until about six months from the start of operation. Was.

Second Embodiment Next, a second embodiment will be described with reference to FIG. This second embodiment is similar to the first embodiment.
Since there is some overlap with the first embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the duplicate description will be omitted.

The difference between the first embodiment and the second embodiment is that
While the first embodiment uses a single magnetic processing device,
In the second embodiment, the first and second magnetic processing devices 7 and 7 'are used. This first magnetic processing device 7
Is disposed at the same position as the first embodiment, and furthermore, the second magnetic processing device 7 ′ is connected to the security filter 11 and the high-pressure pump 12.
Arranged between. By purifying the water in this way, the period before the chemical cleaning of the reverse osmosis membrane is required is about 8 hours.
It extended to about a month. The properties of the purified water thus obtained are as shown in FIG.

The third embodiment will be described with reference to the third embodiment further FIG. This third embodiment is similar to the first embodiment.
Since there are some overlaps with the embodiment and the second embodiment, the same parts as those in the first embodiment and the second embodiment are indicated by the same reference numerals, and the duplicate explanation is omitted.

The water purification apparatus according to the third embodiment is obtained by adding an ion exchange filter 21 to the configuration of the water purification apparatus described in the second embodiment. here,
The ion exchange filter 21 was disposed between the activated carbon filter 14 and the ultrafilter 18.

By using the ion exchange filter 21, impurity ions remaining and dissolved in the passing water can be removed by the first method.
As compared with the purified water obtained in the embodiment and the second embodiment, the water could be removed very efficiently. The properties of the purified water thus obtained are as shown in FIG. The period until the chemical cleaning of the reverse osmosis membrane was required was about 8 months as in the second embodiment.

[0036]

As described above, the use of the water purification apparatus according to the present invention makes it possible to completely remove organic impurities and inorganic impurities, and to use rivers, lakes and marshes that are more polluted than tap water or well water as raw water. Even if water, seawater, or the like is selected, purified water that can be used as medical water with high purity as intended from these raw waters can be generated directly.

Further, when the configuration of the water purification treatment apparatus according to the present invention is adopted, it becomes possible to make the apparatus extremely compact as compared with a conventional apparatus for producing medical water. Therefore, it can be mounted on trucks and other moving objects, and it is possible to transport this water purification device to the stricken area and directly obtain medical water from rivers, lakes, marshes, seawater, etc., and facilitate medical activities. Become.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a purification flow of a water purification treatment device.

FIG. 2 is a conceptual diagram of a purification flow of a water purification treatment device.

FIG. 3 is a conceptual diagram of a purification flow of a water purification treatment device.

FIG. 4 is a comparison list of raw water (seawater), purified water, and dialysis water quality standard values.

[Explanation of symbols]

 2 Raw water 3 paths 7 Magnetic treatment device 9 High speed filter 13 Reverse osmosis membrane filter 14 Activated carbon filter 18 Ultrafilter 21 Ion exchange filter

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI C02F 9/00 502 C02F 9/00 502L 503 503B 504 504B B01D 61/04 B01D 61/04 61/16 61/16 65/08 65 / 08 C02F 1/00 C02F 1/00 U 1/48 1/48 A

Claims (4)

[Claims] An apparatus for purifying water that can directly obtain purified water that can be used as medical water from raw water, comprising a plurality of filtration means, a coarse filter, a fine filter,
It consists of a reverse osmosis membrane filter, activated carbon filter, ultrafilter and various pumps connected and connected, and the water is taken out of the entire purification path from the raw water intake to the purified water intake. The pipe route from the mouth to the reverse osmosis membrane filter is provided with one or more magnetic processing means, and the magnetic processing means applies a magnetic field to the passing water before flowing into the reverse osmosis membrane filter to perform magnetic processing. A water purification treatment device characterized by the above-mentioned. 2. A magnetic processing apparatus as a magnetic processing means for magnetically processing raw water collected by an intake pump from an intake port on a primary side, and a relatively large foreign substance contained in the raw water on a secondary side of the magnetic processing apparatus. A coarse filter for removing fine particles is provided with a pressure pump interposed, and a fine filter for removing microparticles in the passing water is provided on the secondary side of the coarse filter, and on the secondary side of the fine filter. A reverse osmosis membrane filter for removing impurities and contaminants in passing water is installed with a high-pressure pump interposed, and organic impurities and organic contaminants in the passing water are adsorbed and removed on the secondary side of the reverse osmosis membrane filter. And an ultrafiltration device for performing final filtration on the secondary side of the activated carbon filtration device, and an outlet for removing purified water from the ultrafiltration device. The water purification treatment according to claim 1. apparatus. 3. A first magnetic treatment apparatus which is a magnetic treatment means for magnetically treating raw water collected by a water intake pump from an intake port on a primary side, and raw water is included on a secondary side of the first magnetic treatment apparatus. A coarse filter for removing relatively large foreign matter is provided with a pressure pump interposed, and a fine filter for removing microparticles in passing water is provided on the secondary side of the coarse filter or the high-speed filter. A second magnetic treatment device, which is a magnetic treatment means for further magnetically treating the passing water, is provided on the secondary side of the microfilter, and impurities and contaminants in the passing water are removed on the secondary side of the second magnetic treatment device. A reverse osmosis membrane filter is provided with a high-pressure pump interposed, and an activated carbon filter for adsorbing and removing organic impurities and organic contaminants in the passing water is provided on the secondary side of the reverse osmosis membrane filter. Perform the final filtration on the secondary side of the activated carbon filter The water purification treatment device according to claim 1, comprising an ultrafiltration device, and an outlet for removing purified water from the ultrafiltration device. 4. An ion-exchange filter, which is a filter filled with an ion-exchange resin, is disposed in a piping path between the activated carbon filter and an ultrafilter that performs final filtration. The water purification treatment device according to claim 3.