JPH0975775A - Magnetic field moving type magnetic separator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To magnetically separate and easily remove magnetic matter from water to be treated without a rotary mechanism part by setting a magnetic field control means for individually and in point of time changing the intensity of a magnetic field generated by plural magnetic field generating means statically arranged on the anti-adsorptive surface side of static surface adsorbing a material to be removed on a magnetic separating part. SOLUTION: Magnetic flocs in water to be treated 12 are adsorbed and accumulated on the surface of magnetic separation plates 21 by the generated magnetic field of excited electromagnets. A group of magnetic flocs accumulated in the generated magnetic field of electromagnets 20d in the lowest part is at least partially moved to the magnetic field of electromagnets 20c of a larger generated magnetic field by demagnetizing the electromagnets 20d and is absorbed in a group of magnetic flocs accumulated in the magnetic field of the electromagnets 20c. After that, when the electromagnets 20c are demagnetized, at least a part of the group of the magnetic flocs is moved to the magnetic field side of electromagnets 20b of a large generated magnetic field and is absorbed in a group of magnetic flocs accumulated in the magnetic field of the electromagnets 20b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic separation device for water purification, and more particularly to a magnetic separation device for continuously removing magnetic separation products from treated water and a water purification device using this magnetic separation device.

[0002]

2. Description of the Related Art Conventionally, as an example of this type of magnetic separation device,
Chemical Engineering, Vol. 45, No. 4 (1981) pp. 226-231, magnetic field generating means, for example, a permanent magnet is fixed to a rotating disk, and a magnetic substance is adsorbed on the surface of the permanent magnet to be treated water. The structure for separating and removing is described.

[0003]

However, in the prior art, in order to remove the adsorbed magnetic substance, more than half of the rotating disk on which the permanent magnet is arranged is on the gas-liquid free interface of the water flow passage of the water to be treated. It is necessary to be exposed to the inside of the disk, and the flow path structure is required so that the water to be treated comes into uniform contact with the permanent magnet group arranged on the disk. Therefore, it is necessary to form a flow path along the outer peripheral shape of the rotating disk, which complicates the flow path.
Moreover, it is difficult to uniformly attract the magnetic substance to the permanent magnet group of the rotating disk, especially to the permanent magnets arranged on the inner peripheral side and the outer peripheral side of the rotating disk, and there is a problem that the magnetic separation performance is deteriorated.
In addition, there is a problem that the rotary shaft of the rotary disk is exposed to the water to be treated containing the magnetic substance, which lowers the reliability of the rotary mechanism. Further, even when the magnetic field generating means is stationary and the magnetic substance attracting face body moves relatively, a mechanism for rotating the attracting face body holding the magnetic substance in water is required, and the reliability of the rotating mechanism part is deteriorated. There was also. Further, since only the lower half of the rotating disk can be used for the magnetic separation part of the water to be treated, the flow passage cross section becomes narrow, and a double flow passage cross section is required to obtain a desired treatment flow rate, and the apparatus is large. There was a problem to turn.

An object of the present invention is to provide a magnetic separation device which magnetically separates and removes magnetic substances from water to be treated without a rotating mechanism.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and the object is to make the magnetic field generating means group stationary and to electrically generate the magnetic field of the magnetic field generating means group.
And it can be achieved by moving it relative to the water to be treated.

A first means of the present invention for solving the above-mentioned problems is to remove the water to be removed containing the substance to be removed having magnetism, from the water to be removed of the magnetic separation portion having the magnetic field generating means to the substance to be removed adsorption surface. In the purifying device for adsorbing and separating the object to be removed, a plurality of stationary magnetic field generating means are arranged on the non-water contact surface side of the material to be removed adsorption surface, which is the stationary water contact surface of the magnetic separation unit, The magnetic field movement type magnetic separation device having magnetic field control means for individually temporally changing the magnetic field strength generated by the magnetic field generation means.

The second means of the present invention for solving the above-mentioned problems is to remove the substance to be removed from the water to be treated containing the substance to be removed having magnetism in the magnetic separation part having the magnetic field generating means. In a purifying device for adsorbing and separating a removal substance adsorption surface, a. The magnetic separation unit has a treated water flow path through which the treated water flows, and a plurality of magnetic field generating means are provided in an airtight casing arranged in the treated water flow passage, and the outer surface of the hermetic casing adsorbs a substance to be removed. A magnetic separation plate serving as a surface, and magnetic field control means for individually and temporally changing the magnetic field strengths generated by the plurality of magnetic field generation means, b. The magnetic separation plate is arranged such that at least a lower portion of the substance-to-be-removed substance adsorption surface is submerged in the water to be treated and the substance-to-be-removed substance adsorption surface extends vertically. C. The magnetic field generated by the plurality of magnetic field generating means is
Arranged in the magnetic separation plate so as to be lined up and down in order along the removal target adsorption surface, d. In the magnetic field control means, the magnetic field generated by the plurality of magnetic field generation means moves from a lower part to an upper part of the adsorption surface of the substance to be removed, and a magnetic field formed in contact with a lower position of the strong magnetic field. Is a magnetic field moving type magnetic separation device for controlling the plurality of magnetic field generating means so that a weak position of the magnetic field moves from the lower part to the upper part of the substance to be removed adsorption surface along with the movement of the strong magnetic field position. .

In the second means, the magnetic separator is
A recovery pipe having a suction port at a position facing at least a part of the surface of the substance to be removed that is above the water surface, and a recovery pipe having a suction port It may be provided with an exhaust means for exhausting the gas to a low pressure.

Further, in the second means, the water passage to be treated is a closed passage, and the magnetic separation plate is arranged such that the entire adsorption surface of the substance to be removed is below the water surface. It may be provided with a recovery pipe having a suction port at a position facing the upper end of the above and a suction means for sucking water in the recovery pipe.

[0010]

[Operation] The strength of the magnetic field generated by the plurality of magnetic field generation means
By individually changing the time, the position where a strong magnetic field is formed on the removal target substance adsorption surface can be sequentially and continuously moved. If the position where a strong magnetic field is formed is sequentially moved while the substance to be removed is adsorbed on the surface to be removed substance adsorbed, the substance to be adsorbed is moved to the position of the strong magnetic field on the surface to be adsorbed substance to be removed. Moves to a position where the magnetic field is strong. Therefore, the adsorbed substance to be removed can be collected at a desired position on the adsorbed substance to be removed surface without the mechanical operation of the device. When the substance to be removed is collected at a desired position on the surface to be adsorbed with the substance to be removed, a recovery pipe with a suction port facing it is arranged at that position, and the substance inside the recovery pipe is sucked to a low pressure to collect the substance to be removed into the recovery pipe. be able to.

When collecting the substance to be removed at a desired position on the adsorption surface of the substance to be removed, the desired position may be below the water surface or above the water surface. it can.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG. FIG. 1 shows an example of a purification device using a magnetic separation device when purifying raw water such as lakes, rivers, and sewage.

To the raw water such as lakes, rivers, and sewage to be treated with water, magnetic powder such as ferric tetroxide and vanadium sulfate or polyaluminum chloride as a coagulant are added as a pretreatment for the magnetic separation process. The solid suspension, algae, fungi, and microorganisms in the raw water are mixed with the magnetic powder by the aggregating agent to form a large number of colloidal magnetic aggregates having magnetism. These magnetic aggregates are adsorbed and captured by magnetic separation and separated from raw water. In the examples described below,
This magnetic aggregate (magnetic floc) will be explained as a substance to be removed. The magnetic aggregate is not limited to solid suspended matter in the raw water, algae, fungi, and microorganisms, but also impurities in the raw water as described later. The substances that can be magnetically separated, such as pollutants, are the substances to be removed in the present invention.

The water purifying apparatus shown in FIG. 1 has a pump 4 for pumping raw water from a reservoir 1 through a water conduit 2 having a filter 3 and a discharge pipe 2A connected to the discharge side of the pump 4. Raw water storage tank 5 for temporarily storing raw water 6,
A stirrer 11 which is rotationally driven by a motor 10 is internally provided, and a stirring tank 9 is connected to the raw water storage tank 5 by a water guiding tube 2A, a medicine adjusting device 7 connected by a conduit 8 to the water guiding tube 2A, and a stirring tank 9
A purifying magnetic separation container 15 connected to a purifying magnetic separation container 15 via a valve 13 and a water guiding pipe 16 having one end connected to the outlet side of the purifying magnetic separation container 15 and the other end connected to the reservoir 1.
And a sludge tank 18 connected to the purified magnetic separation container 15 by a suction pipe 17. A pump for moving the raw water and the treated water and a means for generating a negative pressure in the head difference and the suction pipe are not shown and described.

The operation of the apparatus having the above structure is carried out as follows. Raw water in the reservoir 1 is temporarily stored in a raw water storage tank 5 by a pump 4 through a filter 3 for removing large dust from the water conduit 2. A magnetic powder of ferric tetroxide and an aggregating agent such as polyaluminum chloride are added to the raw water 6 from a chemical adjusting device 7 through a conduit 8 and sent to a stirring tank 9. The raw water 6 sent to the stirring tank 9 is supplied to the motor 10 in the stirring tank 9.
The solid suspended matter, algae, fungi, and microorganisms in the raw water, which are agitated by the agitator 11 that rotates at, are combined with the magnetic powder by the aggregating agent to form a large number of colloidal magnetic aggregates having magnetism.
The pretreated water 12 containing magnetic aggregates passes through the valve 13 and the water conduit 14 and flows into the purified magnetic separation container 15. In the purification magnetic separation container 15, the magnetic aggregates are separated and removed, and the purified treated water passes through the water conduit 16 and returns to the water source. on the other hand,
The magnetic agglomerates separated and removed in the purification magnetic separation container 15 are taken out by suction through the suction pipe 17, and the sludge tank 1
8 is stored. The magnetic agglomerates stored in the sludge tank 18 are then subjected to dewatering and then incinerated, or the magnetic powder is recovered and then disposed of in landfill or the like for final disposal.

FIG. 2 shows the structure of a purification magnetic separation container 15 which is a magnetic field moving type magnetic separation device. The purified magnetic separation container 15 includes a pretreatment water channel 19 having an open upper portion, and a plurality of magnetic separation plates 21 which are a flat plate-like and airtight housing in which the pretreatment water channel 19 is submerged and a majority of which is submerged. , Electromagnets 20A, 20B, 20C and 20D which are racetrack-shaped magnetic field generating means installed in each magnetic separation plate 21, and a power source 22 which is magnetic field control means connected to the electromagnets 20A to 20D by wirings 23A and 23B. , A recovery pipe 25 having a suction port 26 arranged so as to face the water surface of each of the magnetic separation plates 21, and a suction pipe 1 connected to the recovery pipe 25.
7 is included.

The flat surface of the magnetic separation plate 21 serves as a surface for adsorbing the substance to be removed, and the magnetic separation plate 21 has a thickness surface perpendicular to the flow of the pretreatment water (the surface for adsorbing the substance to be removed is pretreated). It is arranged so as to be parallel to the flow of water) and the adsorption surface of the substance to be removed is substantially vertical, and the upper end portion is above the upper end of the pretreatment water channel 19. The suction port 26 of the recovery pipe 25 is arranged so as to face the portion where the substance-to-be-removed adsorbing surface is located above the upper end of the pretreatment water flow path 19, and where the substance-to-be-removed substance adsorbing surface is present on both sides. Suction ports 26 are provided on both sides of the pipe 25.

As described above, the electromagnets 20A to 20D are each formed in a racetrack shape (elliptical shape), and are arranged such that the straight line portions are vertically arranged.
The interiors are stacked inside one another in a vertically stacked manner (electromagnet 20D is at the bottom and electromagnet 20A is at the top). The electromagnets 20A to 20D symmetrically form magnetic fields on the surfaces of the magnetic separation plate that face each other, and both outer surfaces of the magnetic separation plate are adsorption surface for the substance to be removed. The power supply 22 supplies power to the electromagnets 20A to 20D and can individually change the strength of the generated magnetic field. Based on a preset pattern, the excitation and demagnetization timings of each electromagnet, the excitation, and the increase. Controls the length of magnetism, demagnetization, and demagnetization.

The sludge tank 18 has a suction pipe 17
The vacuum exhaust device 30 connected to the
Sludge tank 27 connected to 0 and vacuum exhaust device 3
It is configured to include an air discharge pipe 28 connected to 0 and a take-out pipe 29 connected to the sludge tank 27.

Hereinafter, the operation of the apparatus having the above structure will be described.
The raw water 6 pumped from the reservoir 1 by the pump 4 is
After being temporarily stored in the raw water storage tank 5, it is sent to the stirring tank 9. Magnetic powder (ferric tetroxide) and a flocculant (polyaluminum chloride) are mixed into the raw water 6 sent to the stirring tank 9 from the chemical regulator 7 and stirred in the stirring tank 9 to obtain a solid suspension in the raw water. The algae, fungi, and microorganisms are bound to the magnetic powder by the aggregating agent to form a large number of colloidal magnetic aggregates having magnetism. Raw water in which solid suspended matter, algae, fungi, and microorganisms become magnetic aggregates is called pretreated water 12. Pre-treated water 12
Is sent from the stirring tank 9 to the purification magnetic separation container 15 and flows through the pretreatment water channel 19 in the direction perpendicular to the paper surface.

Magnetic agglomerates (hereinafter also referred to as magnetic flocs) in the pretreated water 12 are adsorbed and accumulated on the surface (adhesion surface of the object to be removed) of the magnetic separation plate 21 by the magnetic field generated by the excited electromagnet. . As shown in FIG. 3, the magnetic flock group 24D accumulated in the magnetic field generated by the lowermost electromagnet 20D is
By demagnetizing the electromagnet 20D, at least a part of the electromagnet 20C moves to the magnetic field side of the electromagnet 20C having a larger generated magnetic field, and is absorbed by the magnetic floc group 24C accumulated in the magnetic field of the electromagnet 20C. Thereafter, if the electromagnet 20C is demagnetized, at least a part of the magnetic floc group 24C moves to the magnetic field side of the electromagnet 20B having a large generated magnetic field, and the electromagnet 20C
It is absorbed by the magnetic floc group 24B accumulated in the magnetic field of B. After that, the electromagnet 20D is magnetized and the magnetic flocs in the treated water are adsorbed again. In this way, the magnetic floc group moves to the gas-liquid interface side of the pretreated water 12 and moves into the magnetic field generated by the electromagnet 20A in the gas phase.

When the magnetic floc group has moved into the magnetic field generated by the electromagnet 20A in the vapor phase portion, the magnetic floc recovery means in the sludge tank 18, for example, the vacuum exhaust device 30, makes the inside of the recovery pipe 25 a negative pressure through the suction pipe 17. The electromagnet 20A is demagnetized or demagnetized. As a result, the magnetic flock group, which has moved into the magnetic field generated by the electromagnet 20A, becomes
Is sucked into the recovery pipe 25, separated from the surface of the magnetic separation plate 21 (adsorption surface of the object to be removed), and collected in the recovery pipe 25. The magnetic floc group collected in the collection pipe 25 is then guided to the vacuum exhaust device 30 through the suction pipe 17, where it is separated from air and collected in the sludge tank 27. The separated air is discharged to the atmosphere through the air discharge pipe 28. The magnetic flocs collected in the sludge tank 27 are taken out through the take-out pipe 29, subjected to dehydration treatment and magnetic powder collection treatment, and then subjected to final disposal such as incineration and landfill.

Each electromagnet is cooled by the pretreated water 12 via the magnetic separation plate 21.

According to the present embodiment, the magnetic floc group can be moved by stopping the magnetic field generating means of the magnetic separation unit and electrically and periodically changing the strength of the generated magnetic field, so that the magnetic floc group can be moved. Since a mechanism for moving the magnetic field generating means for moving the magnetic field is not required, the reliability of the magnetic separation part is significantly improved.

Further, since most of the magnetic field generating means can be arranged below the surface of the pretreatment water, the pretreatment water can flow over most of the cross section of the passage of the pretreatment water. it can. Further, since the magnetic field of the magnetism generating means can be made long in the pre-treatment water flow direction and can be uniformly arranged in the depth direction of the water depth,
Even in a rectangular fluid channel, magnetic flocs can be evenly adsorbed at any position on the channel cross section, and the flow pressure loss due to the channel shape can be reduced.

In the present embodiment, the case where one magnetic separation plate is provided in the fluid flow direction has been described, but a plurality of magnetic separation plates are provided in the flow direction and are arranged at the same depth in the depth direction. If the demagnetizing and magnetizing timings of the electromagnets are made different so that the electromagnets in the magnetized state are constantly present in at least one stage in the flow direction, the trapping efficiency of the magnetic flocs can be further improved.

Further, in this embodiment, the portion corresponding to the field of the racetrack-shaped electromagnet is hollow, but if an iron core is arranged in this portion, the strength of the magnetic field on the surface of the magnetic separation plate is increased. Has the effect of averaging.

A second embodiment according to the present invention is shown in FIG.
This drawing is different from the embodiment shown in FIG. 3 in that the magnetic separation plate 21
Of the ferromagnetic protrusions 30 having different heights from the surface of the
A (height H) and 30B (height L) and non-magnetic protrusions 31A (height H) and 31B (height L), which also have different heights from the surface of the magnetic separation plate 21, have the same height. This is the point in which the magnetic field separation plates 21 are alternately laminated to generate a larger magnetic field gradient on the surface of the magnetic separation plate 21. As a result, the pretreated water 12
By increasing the adsorption force to the magnetic flocs in the inside, improving the trapping efficiency, increasing the force to move the magnetic flocs, and making unevenness on the surface to create a vortex part of the flow of pretreatment water, By accumulating the magnetic flocs in the bottom portion, it is possible to prevent the accumulated magnetic flocs from being separated from the magnetic separation plate 21 by the force of the flow of the pretreatment water.

Further, the surface of the magnetic separation plate 21 of FIG. 2 is subjected to corrugation, ridge, plateau, etc., in the direction of pretreatment water flow, so that the surface of the magnetic separation plate 21 has a vortex portion. Therefore, it is possible to prevent the magnetic flocs accumulated by the flow of the pretreatment water from being separated from the magnetic separation plate 21.

Further, the surface of the magnetic separation plate 21 shown in FIG. 2 is provided with holes such as a ferromagnetic or non-magnetic wire net or a perforated plate, which is corrugated in the direction of the pretreatment water, such as a corrugated shape, a mountain shape, or a plateau shape. By attaching the perforated concave-convex plate, a vortex portion is also formed in the vicinity of the surface of the magnetic separation plate 21, and magnetic flocs are accumulated between the surface of the magnetic separation plate 21 and the perforated concave-convex plate, and are accumulated by the flow of pretreatment water. This has an effect of preventing the magnetic flocs from peeling off from the magnetic separation plate 21.

Further, in FIG. 3, ferromagnetic protrusions 30A and 30B are provided.
Even if metal wool of a ferromagnetic metal is used instead of the non-magnetic protrusions 31A and 31B, a large magnetic gradient can be obtained, so that the trapping efficiency of magnetic flocs can be improved.

FIG. 5 shows a third embodiment according to the present invention.
This embodiment differs from the embodiments shown in FIGS. 2 and 3 in that the electromagnets 20A, 20B, 20C, 20D in the magnetic separation plate 21 are
The electromagnets 20E, 20F and 20G are arranged beside each other with a half pitch shift. With this structure, when the magnetic flock group on the surface of the magnetic separation plate 21 is moved, the electromagnet 20D,
By demagnetizing in order of 20G, 20C, and 20F, the magnetic field on the surface of the magnetic separation plate 21 can be changed more smoothly, and the magnetic flocs are less likely to be separated due to the flow of pretreatment water.

FIG. 6 shows a fourth embodiment according to the present invention.
The present embodiment is different from the embodiment shown in FIG. 2 in that the magnetic separation plate 21, the suction port 26, and the recovery pipe 25 are arranged in a sealed pretreatment water channel 19 which is isolated from the atmosphere. With this structure, the pretreated water flows in the pretreated water channel 19 in a full state (full state), and the magnetic floc group has the suction port 26.
Is recovered in the recovery pipe 25 together with part of the pretreated water.
Therefore, even if the inside of the pretreatment water flow path 19 is in a high pressure state, the magnetic floc group can be eliminated in the recovery pipe 25 having a lower pressure, and the line from the discharge side of the pump 4 to the outlet of the water guiding pipe 16 of the purifying device of FIG. It can be operated as a pipe, and the pump for circulating water in the equipment can be minimized. Also,
It is possible to prevent the pretreated water from overflowing from the pretreated water channel 19. Although the recovery pipe 25 is arranged above the pretreatment water channel 19 in this embodiment, the recovery pipe 25 may be arranged at any position, and the electromagnet is moved so that the magnetic floc group moves to the suction port 26. 20A, 20B, 20C, 20D
It suffices to control the magnetic field.

In the above embodiments, the case where the normal conducting magnet is used as the electromagnet has been described. However, when the superconducting magnet is used as the electromagnet, the generated magnetic field can be further increased, and the magnetic floc trapping efficiency, This has the effect of further improving the movement power. In this case, the magnetic separation plate 21 serves as a vacuum heat insulating container, and the superconducting magnet is directly or indirectly cooled by a refrigerant such as liquid helium or liquid nitrogen or a mechanical or electronic refrigerator.
The shape of the electromagnet may be, for example, a cylindrical shape other than the race track, or a combination thereof, as long as it is an arbitrary magnet shape that can move the magnetic floc group to the vicinity of the suction port.

Further, in the above embodiment, the case where the magnetic separation part by the electromagnet is used as the main magnetic separator has been described. However, this magnetic separation part is used as the sub magnetic separation element, and the latter stage of this magnetic separation part is used. Even when a high-gradient magnetic separation element, for example, a high-gradient magnetic filter is combined with, a similar effect can be obtained as a primary adsorption / removal device for the magnetic floc group as the preceding magnetic separation element.

Further, by applying a peeling promoting film such as a fluororesin on the surface of the magnetic separation plate 21, it is possible to facilitate the movement of the magnetic floc group adsorbed on the surface due to the change in the magnetic field and improve the removal efficiency.

Further, if the electromagnet group arranged in the airtight magnetic separation plate is cooled by guiding and flowing purified water into the plate, the cooling of the electromagnet can be further promoted.

The raw water mentioned above is water containing impurities such as rivers, dams, lakes, seawater, reservoirs, industrial wastewater, sewage, rainwater, etc. The impurities are organic substances, inorganic substances, microorganisms and the like. Object, metal, non-metal, soil, radioactive material,
For example, metal ions. In particular, divalent iron ions such as ferrous sulfate and alkali are added to raw water containing heavy metal ions to coprecipitate heavy metal ions with the precipitate of ferrous hydroxide, and then oxidized with air to precipitate the precipitates with ferrite. Turn into. This ferritization allows the heavy metal to be magnetically separated. In this case, if the purpose is to separate only the heavy metal ions, the aggregating agent becomes unnecessary. Therefore, in this case, ferrous sulfate, an alkaline solution, and air are injected into the raw water as pretreatment and treated in a stirring tank, and then the pretreated water may be introduced to the magnetic separation unit.

[0039]

According to the present invention, the magnetic field generating means of the magnetic separation section is made stationary, and the strength of the magnetic field generated by the plurality of magnetic field generating means arranged in order is electrically and periodically changed. Since the magnetic floc group can be moved on the removal target substance adsorbing surface, a mechanism for moving the magnetic field generating means for moving the magnetic floc group is not required, and the reliability of the magnetic separation unit is improved.

[Brief description of drawings]

FIG. 1 is a system diagram showing a main configuration of a purifying device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the configuration of a magnetic separation unit of the embodiment shown in FIG.

FIG. 3 is a perspective view showing a structure of a portion of the embodiment shown in FIG.

FIG. 4 is a perspective view showing a second embodiment of the present invention.

FIG. 5 is a sectional view showing a third embodiment of the present invention.

FIG. 6 is a sectional view showing a fourth embodiment of the present invention.

[Explanation of symbols]

1 Reservoir 2,2
A, 2B Water conduit 3 Filter 4 Pump 5 Raw water storage tank 6 Raw water 7 Chemical agent adjusting device 8 Conduit tank 9 Stirring tank 10 Motor 11 Stirrer 12 Pretreatment water 13 Valve 14 Water guiding pipe 15 Purification magnetic separation container (magnetic separation type magnetic separation device) 16 Water Transfer Pipe 17 Suction Pipe 18 Sludge Tank 19 Pretreatment Water Flow Path 20A-20G Electromagnet (Magnetic Field Generating Means) 21 Magnetic Separation Plate 22 Power Supply (Magnetic Field Controlling Means) 23A,
23B Wiring 24B, 24C, 24D Magnetic Flock Group (Magnetic Aggregate) 25 Recovery Pipe 26 Suction Port 27 Sludge Tank 28 Air Outlet Pipe 29 Extraction Pipe 30 Vacuum Evacuation Device

Claims (11)

[Claims] 1. A purifying apparatus for adsorbing and separating the substance to be removed from the water to be treated containing the substance to be removed, which is adsorbed on a surface of the substance to be removed adsorbing surface of a magnetic separation unit having a magnetic field generating means, wherein A plurality of stationary magnetic field generating means are arranged on the side opposite to the surface to be adsorbed of the substance to be removed which is stationary in the separation section,
A magnetic field moving type magnetic separation device comprising magnetic field control means for individually temporally changing the magnetic field strengths generated by the plurality of magnetic field generation means. 2. A purifying apparatus for separating the substance to be removed containing the substance to be removed having magnetism by adsorbing the substance to be removed on the substance-to-be-removed substance adsorbing surface of the magnetic separation unit having a magnetic field generating means, a. The magnetic separation unit has a treated water flow path through which the treated water flows, and a plurality of magnetic field generating means are installed in an airtight casing arranged in the treated water flow passage, and the outer surface of the casing is an adsorption surface of a substance to be removed. And a magnetic field control means for individually and temporally changing the magnetic field strengths generated by the plurality of magnetic field generation means, b. The magnetic separation plate is arranged such that at least a lower portion of the substance-to-be-removed substance adsorption surface is submerged in the water to be treated and the substance-to-be-removed substance adsorption surface extends vertically. C. The magnetic field generated by the plurality of magnetic field generating means is
Arranged in the magnetic separation plate so as to be lined up and down in order along the removal target adsorption surface, d. In the magnetic field control means, the magnetic field generated by the plurality of magnetic field generation means moves from a lower part to an upper part of the adsorption surface of the substance to be removed, and a magnetic field formed in contact with a lower position of the strong magnetic field. Of the plurality of magnetic field generating means so that the weak position of the magnetic field moves from the lower part to the upper part of the adsorption target substance adsorbing surface along with the movement of the strong magnetic field position. Magnetic separation device. 3. The magnetic separation plate is arranged such that at least a part of the surface to be adsorbed of the substance to be removed is on the water surface, and a suction port is provided at a position facing the part of the surface to be adsorbed on the substance to be removed which is on the water surface. The magnetic field moving type magnetic separation apparatus according to claim 2, further comprising: a recovery pipe provided and an exhaust unit configured to exhaust the inside of the recovery pipe to a low pressure. 4. The treated water flow path is a closed flow path, and the magnetic separation plate is arranged such that the entire adsorption surface of the substance to be removed is below the surface of the water, and the magnetic separation plate faces the upper end of the adsorption surface of the substance to be removed. The magnetic field transfer type magnetic separation device according to claim 2, further comprising: a recovery pipe having a suction port, and a suction means for sucking water in the recovery pipe. 5. The magnetic separation plate is internally provided with a plurality of vertical magnetic field generating means, and adjacent magnetic field generating means are arranged so as to be vertically displaced from each other. 2. The magnetic field transfer type magnetic separation device according to any one of 1. 6. The magnetic field transfer type magnetic separation device according to claim 1, wherein the removal target substance adsorption surface is provided with irregularities. 7. The magnetic field transfer type magnetic separation device according to claim 1, wherein a Teflon treatment is performed on the surface to be adsorbed of the substance to be removed. 8. The magnetic field transfer type magnetic separation device according to claim 1, wherein a ferromagnetic substance is intermittently arranged on the surface of the substance to be removed to be adsorbed. 9. The magnetic separation plate is formed in a flat plate shape, and the built-in magnetic field generating means symmetrically forms magnetic fields on the surfaces of the magnetic separation plate facing each other. 5. The magnetic field transfer type magnetic separation device according to any one of 1 to 4. 10. A pump for pumping raw water from a water source,
A raw water storage tank for temporarily storing the pumped raw water, a means for mixing magnetic powder and a flocculant into the raw water in the raw water storage tank, and stirring the raw water mixed with the magnetic powder and a flocculant to form magnetic aggregates in the raw water. Means for producing and pretreating water, magnetic separating means for separating and removing the magnetic aggregates contained in the pretreated water, and means for refluxing the treated water from which the magnetic aggregates have been separated and removed to the water source. A water purification apparatus comprising: a magnetic field separation type magnetic separation apparatus according to any one of claims 1 to 9; 11. The water purifying apparatus according to claim 10, wherein the magnetic separating means includes a high gradient magnetic filter arranged on the downstream side of the magnetic field moving type magnetic separating apparatus.