JP2721393B2 - Water purification system - Google Patents

Description

The present invention relates to a feedwater purification apparatus capable of effectively removing magnetic fine particles in a feedwater flow path, that is, taking measures against red water.

(B) Conventional technology Conventionally, the following method has been known as a measure against the red water.

The first method is to use a microfiltration membrane formed of a porous resin, ceramic, or the like, and a water purifier filled with an adsorbent such as activated carbon.

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

The third method is a pipe rehabilitation method in which an abrasive is mixed with compressed air and sent into a water pipe at a high speed to remove rust nodules and then coat the inner surface of the pipe with an epoxy resin.

(C) Problems to be Solved by the Invention However, each of the conventional methods described above has the following problems to be solved.

That is, in the first method, since the water purifier uses activated carbon, residual chlorine disappears in the treated tap water, and the bactericidal action is lost, so that various bacteria grow. Magnetic fine particles in tap water cannot be filtered by a general pipe strainer (40 to 60 mesh), and a fine filtration membrane having a small pore size has a large pressure loss and cannot flow. Further, since the filtration membrane and activated carbon are disposable, maintenance costs are high.

In the second method, the use of phosphoric acid-based and silicic acid-based rust preventive agents as an emergency measure has been approved,
It is often used constantly, and adding drugs to drinking water poses safety issues.

In the third method, water quality may be adversely affected, for example, elution of dibenzofuran, which is considered to be carcinogenic, and there is a problem in safety.

An object of the present invention is to provide a feedwater purification device that can solve the above-mentioned problems.

(D) Means for Solving the Problems The present invention provides a high-gradient magnetic separation device that arranges a water storage tank in a water supply flow path and purifies the water supply by adsorbing and capturing suspended magnetic particles in tap water by magnetic force. Is attached to the water storage tank, and the high gradient magnetic separation device stores a ring-shaped permanent magnet and an iron ring alternately in an axially stacked state in a holding cylinder body having upper and lower openings, and has a ferromagnetic material inside the permanent magnet. The present invention relates to a water supply purification device comprising a filter cartridge filled with a filter made of a thin wire or a ferromagnetic strip.

Further, the water supply purification device according to the present invention is a filter cartridge for disposing a water purifier in a water supply flow path, and purifying the water supply by adsorbing and capturing suspended magnetic particles in tap water by magnetic force in the water purification device. It is also characterized in that the high gradient magnetic separation device having the above is housed and arranged, and that a water faucet is provided in the water supply channel and the above high gradient magnetic separation device is attached to the water faucet. Having.

(E) Function and Effect In the present invention, the magnetic force generated by the high gradient magnetic separation device, more specifically, a magnetic field generating section for generating a magnetic field, and the magnetic fine particles are adsorbed and captured by being magnetized in the magnetic field. With such a filter, magnetic fine particles as a component of red water can be effectively adsorbed and captured, and so-called solid-liquid can be magnetically separated.

Accordingly, there is no need to use a pipe rehabilitation method of coating the inner surface with a phosphoric acid-based or silicic acid-based rust inhibitor or epoxy resin, which has a problem in safety, and the safety of drinking water can be remarkably improved.

Further, if the magnetic force is removed, the magnetic fine particles adhering 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.

Further, since the magnetic filter has a small space occupation rate and a smaller pressure loss than a membrane having a small pore size such as a microfiltration membrane or an ultrafiltration membrane, a large flow rate processing can be performed.

(F) Example Hereinafter, a water supply purification device according to the present invention will be specifically described with reference to an example illustrated in the accompanying drawings.

The high gradient magnetic separation apparatus A according to the present invention can be installed in a detached house B as shown in FIG. 1, but is installed in a building C as shown in FIGS. 2 to 6. It is characterized by the tank system. In FIG. 1, 11
Is a water supply pipe branched from the water main 10, and is connected to a use point in the house B through a water tap 12, a water stopcock 13, and a water meter 14, and a high gradient magnetic field is provided downstream of the water meter 14. The separation device A is connected.

A high gradient magnetic separation device A according to the present invention will be described with reference to FIGS.

In the figure, reference numeral 21 denotes a first water supply pipe. The first water supply pipe 21 is connected to a water receiving tank 24 through a water stopcock 22 and a water meter 23. The water receiving tank 24 is connected by a pump 25 to an elevated tank 27 installed on the roof of the building C via a second water supply pipe 26. Further, the elevated tank 27 is provided with a third water supply pipe.
The building 28 is connected to a use point on each floor of the building C.

Then, in FIG. 2, the high gradient magnetic separation device A
It is installed on the secondary side (downstream side) of the water receiving tank 24, and is installed on the secondary side (downstream side) of the elevated tank 27 in FIG.

With this configuration, suspended magnetic fine particles (for example, Fe ₂ O ₃ , FeO (OH), etc.) that cause red water contained in tap water flowing from a water main (not shown) are separated by the high gradient magnetic separation device A. By magnetically separating and adsorbing, it is possible to prevent red water from flowing out from the end use point provided in the building C.

FIG. 4 shows that a fourth water supply pipe 29 is connected to one end of a fourth water supply pipe 29 to a third water supply pipe 28 in the building C, and the other end is connected to an elevated tank 27 through a pump 30 to form a circulation flow path. A high gradient magnetic separation device A is mounted in the middle of the circulation channel.

With this configuration, magnetic particles such as Fe ₂ O ₃ and FeO (OH) generated by corrosion of the inner surface of the water supply pipe in the building C are separated and adsorbed, as well as suspended magnetic particles on the primary side such as a water main. be able to.

Further, the stability of the magnetic separation performance can be achieved by adjusting the circulation flow rate to an optimum condition (for example, a flow rate) for magnetic separation.

The embodiment shown in FIG. 5 is an example in which stored water 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 high gradient magnetic separation device A is connected on the way. is there.

FIG. 6 is a modification (pressure tank method) of FIG.
A pressure tank 33 is installed on the secondary side (downstream side) of the pump 25,
A high gradient magnetic separator A is attached to the second water supply pipe 26 located on the secondary side of the pressure tank 33.

Here, the configuration of the high gradient magnetic separation device A will be described below with reference to an example in which the high gradient magnetic separation device A is incorporated in a water purifier D.

7 and 8, a container 42 having a lower end connected to a drinking water inflow pipe 40 and an upper end connected to a drinking water outflow pipe 41 has a high gradient magnetic separation filter cartridge F concentrically disposed therein. doing. 42a is an adsorbent such as activated carbon filled in the container 42.

In the present embodiment, as shown in FIG. 9, the high gradient magnetic separation filter cartridge F has a plurality of ring-shaped permanent magnets 44 and iron rings 44a alternately arranged in an axial direction in a holding cylinder 43 having upper and lower openings. Then, as shown in FIG. 10, a filter 45 made of a ferromagnetic thin wire or a ferromagnetic strip is filled in the permanent magnet 44 as shown in FIG.

With this configuration, a magnetic field is generated in the high gradient magnetic separation filter cartridge F incorporated in the purifier D, and suspended magnetic fine particles (for example, Fe ₂ O ₃₎ contained in tap water flowing from a water supply pipe (not shown). , FeO (OH), etc.) by magnetic separation and adsorption, it is possible to prevent red water from being emitted depending on the end use location.

Further, when the adsorption capturing performance of the high gradient magnetic filter 45 is deteriorated, the cover 42b and the fixed portion 42c are removed, the cartridge F is pulled out, the filter 45 is removed from the permanent magnet 44, and the magnetic field is eliminated, thereby removing the magnetic field. From 45, suspended magnetic particles can be easily washed.

FIG. 11 is a perspective view showing an assembling procedure of the high gradient magnetic separation filter cartridge F.

In addition, although the case where the water purifier D is directly connected to the water supply pipe is shown, an indirect connection method such as a desktop type may be used.

12 and 13 show an example in which the high gradient magnetic separation device A is incorporated in the water outlet 50 of the faucet fitting E shown as a hot and cold water mixing tap.

With this configuration, a magnetic field is generated in the high gradient magnetic separation device A, and suspended magnetic fine particles (for example, Fe ₂ O ₂ , FeO (OH), etc.) contained in tap water flowing from a water supply pipe (not shown).
Is magnetically separated and adsorbed, so that red water does not come out of the faucet fitting E.

The high gradient magnetic separation device A can be installed on the legs of the faucet fitting E or other places.

Further, FIG. 14 shows an example in which the high gradient magnetic separation device A shown in FIG. 7 is installed on a hose 51 connected to a kitchen faucet fitting G.

With this configuration, a magnetic field is generated in the high gradient magnetic separation apparatus A, and suspended magnetic fine particles (for example, Fe ₂ O ₃ , FeO (OH)) contained in tap water flowing from a water main pipe (not shown).
) Can be prevented from flowing out from the faucet fitting G to the kitchen sink 52 by magnetic separation and adsorption.

As described above, the present invention has been described focusing on the installation location of the high gradient magnetic separation device A, but the installation location of the high gradient magnetic separation device A according to the present invention is not limited to the location in the above-described embodiment. Instead, for example, the high gradient magnetic separation device A may be provided integrally with a pump, a water meter, a valve, a strainer, and the like, and may be incorporated in a washing machine, a bathtub, a water heater, and the like.

Further, the configuration of the high gradient magnetic separation apparatus A is not limited to the configuration shown in FIG. 7 at all, and may be, for example, the following configuration.

15 and 16, reference numeral 60 denotes a return frame made of soft iron or the like, which can form a magnetic circuit together with permanent magnets 61 and 62 described later.

In the present embodiment, the return frame 60 is formed by disk-shaped upper and lower walls 60a and 60b and a cylindrical peripheral wall 60c.

The return frame 60 has upper and lower walls 60a, 60b.
Inside, donut-shaped upper and lower permanent magnets 61, 6 respectively
2, and a columnar filter cartridge 63 for adsorbing and removing magnetic fine particles is interposed between the permanent magnets 61 and 62.

Also, an opening 6 is provided at the center of the upper wall 60a of the return frame 60.
4, a fluid inflow pipe 65 extends vertically through the opening 64 into the inside of the return frame 60, and an opening 65a formed at the extension end thereof is formed on the upper surface of the filter cartridge 63. It is in communication with the central part.

On the other hand, a plurality of fluid outlet pipes 66 are connected to the peripheral wall of the filter cartridge 63.

Further, in the above configuration, the filter cartridge 63
As shown in FIG. 17, a hollow cylindrical container 67 composed of thin disk-shaped upper and lower walls and a thin peripheral wall, and a number of disc-shaped filters disposed in a stacked state in the hollow cylindrical container 67 And an element (or a filter module) 68.

As shown in FIGS. 17, 18, and 19, each filter element 68 has a large number of magnetic wires 69 radially arranged in 360 degrees in all directions, and is formed between the magnetic wires 69. The cross-sectional area of the flow path P gradually increases from the center of the filter element 68 toward the outer peripheral edge.

With such a configuration, the velocity of the processing fluid flowing into each filter element 68 gradually decreases as it flows from the center of the filter element 68 toward the outer peripheral edge.

In other words, in the flow of the treated water in the filter cartridge 63, the flow velocity in each of the filter elements 68 in which the ferromagnetic thin wires 69 are arranged radially changes constantly, and the flow velocity near the outer periphery is inversely proportional to the radius as compared with the flow velocity near the center. And will decrease. Therefore, by gradually decreasing the flow rate, the performance of adsorbing and capturing magnetic fine particles is significantly improved.

However, in order to make the space occupancy of the ferromagnetic wires 69 per unit volume of the filter element 68 substantially the same in the radial direction, the ferromagnetic wires 69 are radially arranged in multiple stages. That is, the density per unit central angle of the ferromagnetic thin wire 69 is
The central portion is coarsely arranged gradually toward the outer peripheral edge.

With such a configuration, the processing fluid flows into the filter cartridge 63 from the fluid inlet 65, and flows from the center to the outer periphery in the container 67 in which a number of filter elements 68 are installed. Will be more spilled.

Then, in the flow of the processing fluid, the magnetic fine particles can be adsorbed and removed with high efficiency over a wide flow rate range.

The filter element 68 may be manufactured by knitting or manufacturing a thin wire, or may be manufactured by etching or punching a thin plate, and the shape may be flat, wavy, or uneven.

20 to 22 show another embodiment of the high gradient magnetic separation apparatus A.

As shown in FIG. 20, a high gradient magnetic separation filter cartridge F for adsorbing and removing magnetic fine particles is arranged in a space between a permanent magnet (N magnetic pole) 71 and a permanent magnet (S magnet) 72. I have.

Such a high gradient magnetic separation filter cartridge F includes a non-magnetic material cell 75 composed of a long rectangular box having a fluid inlet 73 and a fluid outlet 74, respectively.
It is formed from a magnetic separation processing tank 76 formed in 75.

In the present embodiment, the magnetic separation processing tank 76 described above is substantially composed of a plurality of divided processing tanks 76a to 76d connected in series,
It has the feature that a bending treatment channel is formed in the non-magnetic cell 75.

That is, as shown in FIGS. 21 and 22, the magnetic separation tank 76 formed in the non-magnetic material cell 75 having a long box shape is
The partition plates 77, 78, and 79 partition the tank into four compartmental processing tanks 76a to 76d.

And, among the partitioned processing tanks 76a to 76d, the partitioned processing tank 76a located at one end side is provided with a fluid inlet 73 on its upper surface, while the partitioned processing tank 76d located at the other end side is
A fluid outlet 74 is provided on the upper surface.

21. Further, as shown in FIG.
Has an upper end connected to the upper surface of the non-magnetic material cell 75 and communication channels 80 and 82 formed between the lower end and the lower surface of the non-magnetic material cell 75. On the other hand, the center partition plate 78 has a lower end connected to the lower surface of the non-magnetic material cell 75 and forms a communication channel 81 between the upper end and the upper surface of the non-magnetic material cell 75.

With such a configuration, all the processing tanks 76a to 76d are connected in series and in a bent manner through the communication passages 80, 81, and 82, thereby forming a bent processing channel.

Next, the internal configuration of each of the compartmentalized processing tanks 76a, 76b, 76c, 76d will be described.

As shown in FIGS. 21 and 22, it is made of a ferromagnetic material,
Also, a number of ferromagnetic fine wires 83 acting as filter elements are arranged parallel to the direction of flow of the processing fluid.

And these ferromagnetic fine wires 83 are spaced at equal intervals,
They are dense and juxtaposed to each other.

With such a configuration, each compartment processing tank 76a, 76b, 76c, 76d
By forming a high gradient magnetic field inside, it is possible to adsorb and remove very small particles.

The space occupation rate of the ferromagnetic thin wire 83 may be the same in each section processing, or, for example, may be increased in the order of 76a, 76b, 76c, 76d, and the particles having a large particle size in the upstream and May be used to capture particles having a small particle size.

Next, a fluid treatment method using the high gradient magnetic separation device A having the above configuration will be described.

First, the processing fluid is supplied to the partitioned processing tank through the fluid inlet 73.
76a, and then through the communication channels 80, 81, 82
Gradually, the liquid is fed from the partition processing tank 76b, which forms the bending processing channel, to the partition processing tank 76c, and then to the partition processing tank 76d, and finally, from the fluid outlet 74 to a desired location.

And in such a bending processing flow path, each processing tank
Since the high gradient magnetic field is formed in each of 76a, 76b, 76c, and 76d as described above, the magnetic fine particles in the processing fluid can be adsorbed to the ferromagnetic fine wire 23 over a long distance or a long time. .

Therefore, even with the high gradient magnetic separation device A, the removal efficiency of the magnetic fine particles can be significantly improved.

In addition, since the high gradient magnetic separation processing is performed using the bending processing flow path, the overall configuration of the high gradient magnetic separation filter cartridge F, and hence the high gradient magnetic separation device, while ensuring high removal efficiency of the magnetic fine particles. The entire configuration of A can be made compact and can be manufactured at low cost.

In addition, in some embodiments described above, a permanent magnet is used to form a magnetic field. However, the present invention is not limited to this, and a magnetic field can be formed using an electromagnet, a superconducting magnet, or the like.

In addition, the magnetic wire is preferably a ferromagnetic stainless steel wire in consideration of corrosion and the like, but is not limited to a stainless steel wire at all.
Lines made of other materials can also be used.

In addition, the ferromagnetic thin wire is a concept including not only a linear linear body but also a filament, a strip, or a magnetic small piece.

[Brief description of the drawings]

FIG. 1 to FIG. 14 are explanatory views of the installation state of a feedwater purification device provided with a high gradient magnetic separation device according to the present invention (FIG. 8 is a sectional view taken along the line II of FIG. 7), and FIG. The figure is a cross-sectional front view of a high gradient magnetic separation apparatus applicable to the present invention, FIG. 16 is a plan view of the same, FIG. 17 is a cross-sectional view taken along the line II-II of FIG.
FIG. 19 is a perspective view of the filter element, FIG. 19 is a partially enlarged perspective view of the filter element, FIG. 20 is a perspective view of another high gradient magnetic separation device applicable to the present invention, and FIG. FIG. 22 is a longitudinal sectional front view of the separation device, and FIG. 22 is a transverse sectional view taken along the line III-III of FIG. In the figure, A: High gradient magnetic separator B: House C: Building D: Water purifier E: Water faucet F: High gradient magnetic separation filter G: Kitchen faucet fitting 10: Water main 11: Water supply pipe 12: water tap 13: water stopcock 14: water meter

Claims (3)

(57) [Claims] 1. A water storage tank is provided in a water supply passage, and a high gradient magnetic separation device for adsorbing and capturing suspended magnetic particles in tap water by magnetic force to purify water supply is attached to the water storage tank. The magnetic separation device contains a ring-shaped permanent magnet and an iron ring alternately housed in an axially stacked state in a holding cylinder body with upper and lower openings, and a filter made of a ferromagnetic thin wire or a ferromagnetic band-like thin plate inside the permanent magnet. A water supply purification device comprising a filter cartridge filled with a water. 2. A water purifier is provided in a water supply channel,
A feed water purifying apparatus, wherein a high gradient magnetic separation device including a filter cartridge for adsorbing and capturing suspended magnetic particles in tap water by magnetic force and purifying the feed water is housed and arranged in the water purifier. 3. A high gradient filter having a water faucet provided in a water supply channel and a filter cartridge for adsorbing and capturing suspended magnetic particles in tap water by magnetic force to purify the water supply. A feedwater purifier equipped with a magnetic separation device.