JPH02303595A - Feed water cleaning device - Google Patents

Abstract

PURPOSE:To effectively remove the magnetic fine particles in a feed water-flow passage by providing a magnetic separating unit which attracts and removes the magnetic fine particles suspended in city water and a magnetic treating device which introduces the city water into a magnetic field and executes a magnetic treatment and disposing the former before the latter. CONSTITUTION:The magnetic separating unit MSU is provided in the front stage of the feed water-flow passage and the ferromagnetic fine particles which suspend in city water and adsorb on the magnetic pole of a magnet included in the magnetic treating unit MTU behind the above mentioned unit to degrade the performance thereof are efficiently and selectively removed by the high-grade magnetic field formed around ferromagnetic fine wires. The city water is then passed into the magnetic field of the magnetic treating unit MTU provided in the rear stage and the state of the water molecules or the materials dissolved in the water is changed to prevent the corrosion of the pipings and apparatus installed downstream and the sticking of scale thereto. The magnetic fine particles in the feed flow passage are effectively removed in this way while the performance of the magnetic treating unit MTU is maintained continuously over a long period of time. The generation of red water according to the use points at the terminal is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a water supply purification device that can effectively remove magnetic particles in a water supply flow path, that is, effectively take measures against red water.

(b) Conventional technology Conventionally, the following methods have been known as countermeasures against red water.

The first method is to use a water purifier filled with a precision filtration membrane made of porous resin, ceramic, etc., and an adsorbent such as activated carbon.

The second method is to use a phosphoric acid-based or silicic acid-based rust preventive agent on the inner surface of the water supply pipe.

The third method is a pipe rehabilitation method in which rust bumps are removed by mixing abrasives with compressed air and feeding it into water pipes at high speed, and then coating the inner surface of the pipes with epoxy resin.

(C) Problems to be Solved by the Invention However, all of the above-mentioned conventional methods have the following problems to be solved.

That is, in the first method, since activated carbon is used in the water purifier, there is no residual chlorine in the treated tap water, which eliminates the bactericidal action and allows bacteria to grow. In addition, magnetic particles in tap water can be removed using a general piping strainer (40 to 60
Meshes cannot be used for filtration, and precision filtration membranes with small pore sizes have a large pressure loss and cannot provide a sufficient flow rate.Furthermore, since filtration membranes and activated carbon are disposable, maintenance costs are high.

In the second method, phosphoric acid-based and silicic acid-based rust preventives are allowed to be used as an emergency measure, but they are often used on a regular basis, and the herbal medicine is added to drinking water. Adding it also poses a safety problem.

In the third method, dibenzofuran, which is considered to be carcinogenic, may be eluted, which may have an adverse effect on water quality, and there are safety problems.

An object of the present invention is to provide a water supply purification device that can solve the above problems.

(d) Means for Solving the Problems The present invention introduces tap water into a water supply flow path within a magnetic field generated and formed by a permanent magnet, an electromagnet, a superconducting magnet, etc., and contains a large number of ferromagnetic thin wires in the tap water. Or a magnetic separator that adsorbs and removes magnetic particles suspended in tap water using a high gradient magnetic field equipped with a filter element made of small pieces of ferromagnetic material, and permanent magnets, electromagnets, superconducting magnets, etc. This relates to a water supply purification device characterized in that a magnetic treatment device that introduces tap water into a magnetic field and performs magnetic treatment is installed, and a magnetic separation device is placed upstream of the magnetic treatment device. .

(e) Functions and Effects In the present invention, the fluid first passes through the magnetic separation device, that is, the magnetic separation channel through the fluid inlet, then flows into the magnetic processing channel, and finally, from the fluid outlet. It will be delivered to the desired location.

In this way, the feed water purification system uses a magnetic separator in the first stage to effectively adsorb ferromagnetic fine particles suspended in water within the high gradient magnetic field formed around the ferromagnetic wires, and then By passing the fluid through the magnetic field formed in the magnetic processing device MTtl, the state of water molecules constituting the fluid, dissolved substances dissolved in the water, or fine particles and colloidal substances suspended in the water is measured. By changing the temperature, it is possible to prevent corrosion and scale build-up of downstream piping and equipment.

In other words, by arranging a magnetic separation device capable of forming a high gradient magnetic field before the magnetic processing device, ferromagnetism that attracts the magnetic poles of the magnet contained in the magnetic processing device and degrades the performance of the magnetic processing device Fine particles can be efficiently and selectively removed, and the performance of the magnetic processing device MTU can be maintained continuously over a long period of time.

Therefore, there is no need to use a pipe rehabilitation method in which the inner surface is coated with a phosphoric acid-based or silicic acid-based rust preventive agent or an epoxy resin, which poses a safety problem, and the safety of drinking water can be significantly improved.

Moreover, if the magnetic force is removed, the magnetic particles attached to the magnetic separation filter can be easily backwashed, the magnetic separation filter can be used any number of times, and the cost required for maintenance can be reduced.

Furthermore, the magnetic filter has a small space occupation factor and has less pressure loss than membranes with small pore sizes such as microfiltration membranes and ultrafiltration membranes, so it is possible to process large flow rates.

(f) Example Hereinafter, the water supply purification device mA according to the present invention will be specifically described with reference to the example shown in the attached drawings.

[First Embodiment 1] As shown in FIG.
This is an example in which the system is installed in detached house B (direct water connection system).

As shown in the figure, a water supply pipe 11 branched from a water main 10
12. Water stop valve 13. It is connected to a usage location in house B through a water meter 14.

In the above configuration, the magnetic separation device MSU according to the present invention
and the magnetic processing unit MTU are connected to the water supply pipe 11 that forms the secondary side (downstream side) of the water meter 14.

Is there a magnetic separation device here? As described later, in ISU, tap water is introduced into a magnetic field generated by a permanent magnet, an electromagnet, a superconducting magnet, etc., and a filter element made of many fine ferromagnetic wires or small ferromagnetic pieces is placed in the tap water. A magnetic separation channel is formed inside, and magnetic fine particles floating in the tap water can be adsorbed and removed by the high gradient magnetic field formed in the magnetic separation channel P2.

On the other hand, the magnetic processing unit MTU performs magnetic processing by introducing tap water into a magnetic processing channel P1 generated and formed by a permanent magnet, an electromagnet, a superconducting magnet, etc., as will be described later.

In other words, in the first stage, is there a magnetic separation device? Using ISU, ferromagnetic fine particles suspended in water are effectively adsorbed in the high gradient magnetic field formed around the ferromagnetic thin wire, and in the subsequent stage,
By passing the fluid through the magnetic field formed inside the magnetic treatment bag afMTIJ, the state of water molecules constituting the fluid, dissolved substances dissolved in the water, or fine particles and colloidal substances suspended in the water is changed. By doing so, it is possible to prevent corrosion and scale adhesion of pipes and equipment installed downstream.

In other words, a magnetic processing device? By installing a magnetic separation device MSII capable of forming a high gradient magnetic field in the front stage of ITtl, it is possible to efficiently remove ferromagnetic fine particles that are attracted to the magnet contained in the magnetic processing device MTU and reduce the performance of the magnetic processing device MTυ. It is possible to remove it selectively and maintain the performance of the magnetic processing unit MTU continuously over a long period of time, and it is possible to prevent red water from coming out from the end point of use.

[Second Example 1 This example describes the magnetic separation device n constituting the feed water purification device A.
This is an example in which su and one magnetic processing device 1' are installed in building C as shown in FIGS. 2 to 6 (tank type).

In the figure, 21 is a first water supply pipe, and the first water supply pipe 21 is
Main faucet 22. It is connected to a water receiving tank 24 through a water meter 23. Further, the water receiving tank 24 is connected to an elevated tank 27 installed on the roof of the building C by a pump 25 via a second water supply pipe 26. Further, the elevated tank 27 is connected to the usage locations on each floor of the building C through a third water supply pipe.

In FIG. 2, the magnetic separation device [Mstl] and the magnetic treatment device MTU are installed on the secondary side (downstream side) of the water receiving tank 24, and in FIG. It is installed on the next side (downstream side).

With this configuration, suspended magnetic fine particles (which cause red water) contained in tap water flowing in from a water main (not shown) are removed.
For example, Fezes + FeO(OH), etc.) are magnetically separated and adsorbed by a magnetic separator MSυ, and
Thereafter, by performing magnetic treatment using the magnetic treatment device U, it is possible to prevent red water from coming out from the end use location provided in the building C.

FIG. 4 also shows that one end of the fourth water supply pipe 29 is connected to the third water supply pipe 28 in the building C, and the other end is connected to the pump 3.
0 to the elevated tank 27 to form a circulation channel, and a magnetic separation device MSU and a magnetic processing device fl'lTU are installed in the middle of the circulation channel.

With this configuration, not only suspended magnetic particles on the primary side of water mains, etc., but also magnetic particles such as E'exOs and Fe0(OH) generated due to corrosion on the inner surface of the water supply pipes in Building C can be magnetically separated and adsorbed. After that, it can be magnetically treated.

Furthermore, by adjusting the circulating flow rate to optimal conditions (eg, flow rate) for magnetic treatment and magnetic separation, it is possible to improve the stability of magnetic treatment performance and magnetic separation performance.

In the embodiment shown in FIG. 5, the water stored in a storage tank such as a water receiving tank 24 or an elevated tank 27 is constantly circulated through a circulation pipe 31 by a pump 32, and a magnetic separator MSII that constitutes a water purification device A is installed in the middle. This is an example in which a magnetic processing unit MTU and a magnetic processing unit MTU are connected.

Figure 6 is a modification of Figure 2 (pressure tank system), in which a pressure tank 33 is installed on the secondary side (downstream side) of the pump 25, and a second water supply located on the secondary side of the pressure tank 33 is installed. tube 26
It is characterized in that a magnetic separation layer 'znsu and a magnetic treatment bag fMTtl constituting the water supply purification device A are attached to the water purification device A.

(Third Embodiment) Furthermore, FIGS. 7 and 8 are examples in which the magnetic processing device old υ and the magnetic processing device MTU are incorporated into the spout portion 40 of a faucet fitting E shown as a hot water mixing faucet. .

By such configuration, magnetic separation device? A magnetic field is generated in the ISO and the magnetic processing unit MTU, and suspended magnetic fine particles (for example, F
e1nt, Pea (OH), etc.), and then magnetically treat it.
E can prevent red water from coming out.

Note that the magnetic separation device nsu and the magnetic treatment device MTU can be installed at the leg portion of the faucet fitting E or at other locations.

[Fourth Embodiment] Furthermore, FIG. 9 shows a magnetic processing device υ and a magnetic processing device attached to a hose 61 connected to a faucet fitting G for a kitchen sink. 1T
This is an example in which the II is installed.

With this configuration, a magnetic field is generated in the magnetic separation device nsu and the magnetic treatment device MTU, and suspended magnetic fine particles (for example, F
By magnetically separating and adsorbing the components (e, Oj, Pea (OH), etc.) and then magnetically treating them, it is possible to prevent red water from flowing from the faucet fitting G into the kitchen sink 52.

The above is the magnetic separation device MStl that constitutes the water supply purification device A.
Although the present invention has been explained with a focus on the installation location of the magnetic processing device MTU, the magnetic separation device 115 according to the present invention
The installation locations of υ and the magnetic processing device 11TU are not limited to the locations in the above-described embodiments, and include, for example, a purifier, a pump, an I-water device, and a valve.

It may be provided integrally with a strainer etc., and furthermore, a washing machine,
It may also be incorporated into a bathtub, water heater, etc.

[Fifth Example] Next, the 10th rj! The specific configuration and operation of the magnetic separation device 11SU and magnetic treatment device MTU that can be effectively used in the feed water purification device fA according to the present invention including the above embodiments will be explained with reference to FIGS. .

First, with reference to FIGS. 10 to 14, one specific example of the magnetic separation device MStl forming the front stage of the feed water purification device A according to the present invention will be described.

In FIGS. 1O and 11, 80 is a return frame made of soft iron or the like, and permanent magnets 81.
Together with 82, a magnetic circuit can be formed.

In this embodiment, the return frame 8° is composed of upper and lower walls 80a, 80b, and left and right side walls 80c, 80d.

The turn frame 80 also has upper and lower walls 80a.
.

Upper and lower rectangular plate-shaped permanent magnets 8 are provided on the inner surface of the magnet 80b, respectively.
1.82 is attached, and a magnetic field generating section M is formed between both permanent magnets 81 and 82 as shown in FIG.

As shown in FIGS. 10 and 12, inside the magnetic field generating section M, there are a tap water inlet 83 and a tap water outlet 8, respectively.
4, a non-magnetic cell 8 consisting of a long rectangular box body comprising
A plurality of magnetic separation tanks 86 are formed in parallel in the non-magnetic cell 85.

The plurality of magnetic separation layers 86 are connected in series while being bent to form a long magnetic separation channel P2 within the magnetic separation tank 86.

Further, as shown in FIGS. 12 and 13, a large number of ferromagnetic thin wires 87 that act as filter elements are arranged in each magnetic separation tank 86 in parallel to the flow direction of tap water.

These ferromagnetic thin wires 87 are spaced at equal intervals,
They are densely arranged and parallel to each other.

The principle of forming a high gradient magnetic field in the magnetic separation layer fiNsU described above will be explained below.

In Figure 14, a ferromagnetic thin wire 8 is shown perpendicular to the direction of the magnetic field.
7 shows a conceptual configuration of a magnetic separation device MSU in which 7 is arranged.

That is, in FIG. 14, a cross section of the magnetic separation device MSIJ in a direction perpendicular to the ferromagnetic thin wire 87 is shown, and Nff1 magnets 81 . ! :S pole magnet 8
2, the tap water will flow perpendicular to the paper from the front to the back (or from the back to the front).

In the magnetic field generated by the magnetic separation device MSIJ, the lines of magnetic force 88 flow as shown by solid lines including arrows.

That is, the magnetic field lines 88 go from the N8iff stone 81 to the S pole magnet S2, but the ferromagnetic thin wire 87 placed in the middle
Since the magnetic field is distorted near the ferromagnetic wire 87, a high gradient magnetic field is formed near the ferromagnetic wire 87.

Therefore, the magnetic fine particles 89 floating in the tap water are attracted to the ferromagnetic thin wire 87 along the arrow shown by the broken line.

In this way, in the magnetic processing device U, the magnetic fine particles 89 can be attracted to the ferromagnetic striped wires 87, and the adsorption ability of the ferromagnetic thin wires 87 is greater than that of the ferromagnetic fine particles 89 with large magnetization. becomes significantly larger.

Therefore, by arranging a large number of ferromagnetic thin wires 87 between the north pole magnet 81 and the south pole magnet 82, the attracting area can be increased, and a large amount of ferromagnetic fine particles S9 can be efficiently and reliably attracted and removed. I can do seven things.

Next, the magnetic treatment device M that constitutes the latter stage of the water supply purification device A
The TU will be explained with reference to FIGS. 15 to 18. In FIGS. 15 and 16, 70 is a return frame made of soft iron or the like, and a permanent magnet 71, which will be described later, is
．． Together with 72, a magnetic circuit can be formed.

In this embodiment, the return frame 70 is composed of upper and lower walls 70a, 70b, and left and right side walls 70c, 70d.

Further, the return frame 70 has upper and lower walls 70a.

Rectangular plate-shaped upper and lower permanent magnets 7 are provided on the inner surface of the magnet 70b, respectively.
1.72 is attached, and a magnetic field generating portion M is formed between both permanent magnets 71 and 72 as shown in FIG.

In the magnetic field generating section M, as shown in FIGS. 15 and 17, there is a non-magnetic self-container 5 made of a long rectangular box having a tap water inflow lower 3 and a tap water outflow lower 4, respectively. A plurality of magnetic treatment tanks 76 are formed in parallel in the nonmagnetic self 5.

The plurality of magnetic processing layers 76 are connected in series while being bent to form a long magnetic processing channel P within the magnetic processing tank 76.

With this configuration, the magnetic processing device MT[l can ensure a sufficient magnetic processing length, and can effectively perform magnetic processing while maintaining a compact shape.

Next, the above-mentioned magnetic separation device MSU and magnetic processing device MTI
A method for treating tap water by the water supply purification device A consisting of I will be described.

The treated water first passes through the fluid inlet 83 to the magnetic separator? It passes through the LSU, that is, the plurality of magnetic separation channels P8 forming a bent processing channel, then flows into the magnetic processing channel P1 via the tap water outlet 84 and the tap water inflow lower 3, and finally , the fluid is delivered to a desired location from the fluid outflow lower 4.

2, in this embodiment, the water treatment device fA uses a magnetic separation device nsu at the front stage, and the ferromagnetic material suspended in the water is The fine particles are effectively adsorbed, and in the latter stage, the fluid passes through the magnetic field formed in the magnetic processing device MTLI, thereby removing water molecules constituting the fluid, dissolved substances dissolved in the water, or suspended substances in the water. By changing the state of fine particles and colloidal substances, corrosion and scale adhesion of downstream piping and equipment can be prevented.

That is, by disposing the magnetic separation device 115υ capable of forming a high gradient magnetic field in the front stage of the magnetic processing device MTII, it is attracted to the magnetic pole of the magnet included in the magnetic processing device-TO, and the magnetic separation device-↑U It is possible to efficiently and selectively remove ferromagnetic fine particles that degrade the performance of the magnetic processing unit MTU, and to maintain the performance of the magnetic processing unit MTU continuously over a long period of time.

[Sixth Example 1 This example is based on the magnetic processing apparatus described above. The present invention relates to a water supply purification device characterized by integrally forming an ITU and a magnetic separation device MSIJ.

The structure of the water supply purification device A will be described in further detail with reference to FIGS. 19 to 22vlJ.

In the figure, 90 is a return frame made of soft iron or the like, and can form a magnetic circuit together with permanent magnets 91 and 92, which will be described later.

In this embodiment, the return frame 90 is composed of upper and lower walls 90a, 90b, and left and right side walls 90c, 90d.

Further, the return frame 90 has upper and lower walls 90a.

Rectangular plate-shaped upper and lower permanent magnets 9 are provided on the inner surface of the magnet 90b.
1.92 is attached, and a magnetic field generating portion M is formed between both permanent magnets 91.92 as shown in FIG.

As shown in FIGS. 19 and 21, inside the magnetic field generating section M, there are a tap water inlet 94 and a tap water outlet 9, respectively.
3. A non-magnetic cell 9 consisting of a long rectangular box body comprising:
5, a magnetic separation tank 97 which is formed in parallel in the same non-magnetic cell 95 and functions as a magnetic separation device MSU, and a magnetic treatment device which functions as a magnetic treatment device MTtl! ! 96.

and a plurality of magnetic components M forming a magnetic separation device nsu.
The tanks 97 each form a magnetic separation channel Pg therein, and a magnetic separation channel M located in the most upstream section.
l? The i91 is provided with a tap water inlet 94 on its front surface.

On the other hand, the magnetic processing tank 96 forming the magnetic processing device MT[I has a magnetic processing channel P1 formed therein and a tap water outlet 93 on the front surface thereof.

Further, as shown in FIGS. 21 and 22, a large number of ferromagnetic thin wires 98 that act as filter elements are arranged in each magnetic separation tank 97 in parallel to the flow direction of tap water.

These ferromagnetic thin pieces 4198 are arranged densely and parallel to each other at equal intervals.

Furthermore, the performance of the magnetic separation device MStl is generally expressed by the following equation (1) using the effective length Le.

Le-(L/a)(Vm/Vo) ・ ・ ・ ・
・ ・ (1) Here, L and a are each ferromagnetic thin 1
In the effective length and radius of 1A98, Vo is the tap water flow velocity, and ■■ is the magnetic velocity given by the following equation (2).

Vm-(2/9) (zp ・ Ms-Ho -b
' / yy ・ a) ・ ・ (2)
In the above equation (2), χ and b are the specific magnetic susceptibility and radius of the magnetic fine particles, h is the saturation magnetic flux density of the ferromagnetic wire, Ho is the strength of the applied magnetic field, and η is the viscosity coefficient of tap water for the magnetic fine particles. be.

In other words, the larger the value of Le, the better the performance of high-gradient magnetic separation.In order to improve the adsorption and removal performance of SU magnetic fine particles in a magnetic separation device, the tap water flow rate shown by equation (2) is required. All that is required is to lower Vo.

From this, the magnetic component 1llI flow path P formed in each magnetic separation tank 97 constituting the magnetic separation device MStl has a cross-sectional area larger than that of the magnetic treatment flow path P1, so tap water It is possible to reduce the flow rate and provide smaller magnetic separation performance, and in this embodiment, the magnetic separation device MSU and the magnetic treatment device MTtl are formed in the same feed water purification device A. Therefore, the structure of the water supply purification device can be kept compact, saving installation space and reducing device costs.

Furthermore, in this example, as shown in FIG. 22, the cross-sectional area of the magnetic processing channel P and the magnetic separation channel P! In other words, the cross-sectional area of the magnetic processing channel P is made smaller than the cross-sectional area of the magnetic separation channel P2.

Therefore, in the magnetic processing channel P with a narrow channel cross-sectional area,
While it is possible to set the flow velocity to the most suitable speed for magnetic treatment, and the efficiency of the magnetic treatment effect can be significantly improved, in the magnetic separation channel Pt with a large channel cross-sectional area,
It becomes possible to lower the flow velocity considerably compared to that in the magnetic processing channel P, and the performance of magnetic separation can be significantly improved.

Therefore, the effect of removing the magnetic fine particles described above can be further improved.

Furthermore, in the above-described embodiments, permanent magnets were used to form the magnetic field, but the present invention is not limited to this, and the magnetic field may also be formed using electromagnets, superconducting magnets, or the like.

In addition, the ferromagnetic thin wire is preferably a ferromagnetic stainless steel wire in consideration of corrosion, but is not limited to stainless steel wire in any way, and can be made from other materials as long as it has ferromagnetism. You can also use a line like

Furthermore, ferromagnetic fine wires may be those woven into a rope or original shape, those formed into glass wool, those processed so that thin wire portions remain by etching or punching a thin plate of magnetic material, or those made of non-magnetic material. It is also possible to use a thin plate printed with a ferromagnetic material.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the installed state of the feed water purification device according to the first embodiment of the present invention, FIGS. 2 to 9 are explanatory diagrams of the installed state of the feed water purification device according to the second to fourth embodiments, Figure 1O is the 5th
A perspective view of the magnetic separation device according to the embodiment, FIG. 11 is a sectional front view of the same, FIG. 12 is an enlarged sectional plan view of the same main part, FIG. 13 is a cross sectional view taken along the line 1-1 in FIG. 15 is a perspective view of the magnetic processing apparatus according to the fifth embodiment, FIG. 16 is a sectional front view of the same, FIG. 17 is an enlarged sectional plan view of the same essential parts, and FIG. 18 is a cross-sectional view taken along the line ■-■ in FIG. 17, FIG. 19 is a perspective view of the magnetic separation device according to the sixth embodiment, FIG. 20 is a front view of the same cross-section, and FIG. 21 is an enlarged cross-section of the same essential parts The plan view and FIG. 22 are cross-sectional views taken along the line ■--■ in FIG. 21. In the diagram, A: Water purification device B: House C: Building E: Faucet fitting G: Kitchen sink faucet fitting MTU: Magnetic treatment device MSU: Magnetic separation device 10: Water main 11: Water supply pipe 12: Min. Faucet 13: Stop valve 14: Water meter

Claims (1)

[Claims] 1. Tap water is introduced into a water supply channel into a magnetic field generated by a permanent magnet, an electromagnet, a superconducting magnet, etc., and a large number of ferromagnetic wires or small pieces of ferromagnetic material are mixed in the tap water. A magnetic separation unit (MSU) that adsorbs and removes magnetic particles suspended in tap water using a high gradient magnetic field equipped with a filter element, and a magnetic field generated by permanent magnets, electromagnets, superconducting magnets, etc. A water supply purification system characterized by installing a magnetic treatment unit (MTU) that introduces tap water and performs magnetic treatment, and installing a magnetic separation unit (MSU) before the magnetic treatment unit (MTU). Device 2, magnetic separation unit (MSU) and magnetic processing unit (MTU)
2. The water supply water purification device according to claim 1, wherein the water supply water purification device is integrated with or connected directly or indirectly to water supply equipment provided in the middle or at the end of the water supply channel. 3. The water supply channel is connected to a storage tank from the end or halfway, and is circulated by a circulation pump, and the circulation channel is equipped with a magnetic separation unit (MSU) and a magnetic treatment unit (MTU). The water supply purification device according to claim 1. 4. The water supply purification device according to claim 1, wherein the faucet fitting is provided with a magnetic separation unit (MSU) and a magnetic separation unit (MTU).