WO2014054799A1 - 磁性体再利用装置 - Google Patents
磁性体再利用装置 Download PDFInfo
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- WO2014054799A1 WO2014054799A1 PCT/JP2013/077144 JP2013077144W WO2014054799A1 WO 2014054799 A1 WO2014054799 A1 WO 2014054799A1 JP 2013077144 W JP2013077144 W JP 2013077144W WO 2014054799 A1 WO2014054799 A1 WO 2014054799A1
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- magnetic
- flow path
- magnetic force
- water
- magnetic body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/025—High gradient magnetic separators
- B03C1/031—Component parts; Auxiliary operations
- B03C1/032—Matrix cleaning systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/025—High gradient magnetic separators
- B03C1/031—Component parts; Auxiliary operations
- B03C1/033—Component parts; Auxiliary operations characterised by the magnetic circuit
- B03C1/034—Component parts; Auxiliary operations characterised by the magnetic circuit characterised by the matrix elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/28—Magnetic plugs and dipsticks
- B03C1/288—Magnetic plugs and dipsticks disposed at the outer circumference of a recipient
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/18—Magnetic separation whereby the particles are suspended in a liquid
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Definitions
- the present invention relates to a magnetic material recycling apparatus.
- a water purification system for purifying treated water such as wastewater is equipped with a coagulation magnetic separation device that adds a flocculant and magnetic powder to the treated water to generate a magnetic floc, and this magnetic floc is adsorbed and recovered by a magnetic force. There is something.
- the magnetic floc collected by the aggregating magnetic separation device is discarded as waste, and at this time, the magnetic powder is also discarded.
- Magnetic powder is a reusable resource and is preferably recovered and reused.
- sludge pressurized to 10 MPa or more by the slurry pressurizing pump 31 is discharged into the reaction tube 34, and heat recovery is performed from the heater 35 heated by the power source 36 and the treated sludge. It is heated to less than about 350 ° C. by the residual heat exchanger 37 to be in a subcritical state and led to the magnetic powder separator 38 ”(see paragraph 0013).
- the magnetic powder separator (magnetic material recovery device) provided in the sludge purification device disclosed in Patent Document 1 is configured to be able to recover magnetic powder from magnetic flocks contained in water to be treated (washing water).
- the magnetic powder separator disclosed in Patent Document 1 is configured to recover the magnetic powder from the magnetic floc contained in the pressurized and heated water to be treated. Therefore, energy for pressurizing and heating the water to be treated is required for collecting the magnetic powder.
- the floc and the magnetic powder can be effectively separated as the temperature and pressure increase, the amount of energy required for pressurizing and heating the water to be treated increases in order to improve the recovery amount of the magnetic powder.
- the aggregating performance of the aggregating agent that agglomerates the magnetic powder on the floc is lowered. That is, the aggregating performance of the aggregating agent adhering to the magnetic powder contained in the magnetic floc is reduced by heating the magnetic floc. Therefore, when the recovered magnetic powder is reused, a new aggregating agent is required.
- this invention makes it a subject to provide a magnetic body reuse apparatus provided with the magnetic body collection
- the present invention provides two magnetic body circulation portions each having a flow path through which magnetic flocs generated by adding magnetic powder and a flocculant to the water to be treated circulate with the water to be treated; And a magnetic material recycling device having a magnetic material recovery device having a magnetic force generation part for generating a magnetic force and having a wire mesh made of a ferromagnetic material disposed in a flow path.
- the magnetic force generation part is provided so as to be able to reciprocate between one and the other of the two adjacent magnetic substance circulation parts, and the magnetic substance recovery device passes through the flow path of the magnetic substance circulation part on the side where the magnetic force generation part has moved.
- At least a part of the magnetic floc that circulates with the water to be treated is attracted by the magnetic force generated by the magnetic force generating part and adsorbed to the tube wall of the flow path, and is disposed in the flow path of the magnetic material circulating part on the side that has moved.
- the magnetic floc By magnetizing the wire mesh, at least a part of the magnetic floc is adsorbed to the wire mesh, and further, shearing force is applied to the magnetic floc adsorbed on the pipe wall of the flow channel or the wire mesh with the washing water flowing through the flow channel.
- the magnetic powder is separated from the magnetic floc.
- a magnetic material recycling apparatus including a magnetic material recovery device that can separate and recover magnetic powder from magnetic flock without pressurizing and heating water to be treated containing magnetic flock.
- FIG. 1 It is a figure which shows the water purification system with which the magnetic body collection
- FIG. 1 is a view showing a water purification system equipped with a magnetic material recovery apparatus of the present embodiment.
- the water purification system S ⁇ b> 1 of this embodiment feeds water to be treated such as waste water stored in the raw water tank 1 to the rapid stirring tank 6 by the raw water pump 2.
- the flocculant stored in the flocculant tank 3 is injected into the rapid agitation tank 6 to which the water to be treated is fed by the flocculant injection pump 23, and the water to be treated into which the flocculant has been injected is agitated by the agitator 6a. Is done.
- the flocculant As the flocculant, PAC (polyaluminum chloride), ferric sulfate, ferric chloride, aluminum sulfate and the like are used.
- the to-be-removed object such as floating substance having a negatively charged surface or emulsion such as oil contained in the water to be treated is aggregated by neutralizing the surface charge by the injected flocculant.
- micro flocs are formed in the rapid stirring tank 6.
- Water to be treated containing flocs generated by rapid stirring in the rapid stirring tank 6 is sent to the slow stirring tank 7.
- magnetic powder such as magnetite particles stored in the magnetic powder tank 4 is injected by the magnetic powder injection pump 24, and the polymer flocculant stored in the polymer flocculant tank 5 is stored. Injected by the polymer flocculant injection pump 25.
- the slow stirring tank 7 the water to be treated is slowly stirred by the stirring device 7a, and aggregation in a state including the magnetic powder is promoted to generate the magnetic floc FL.
- the slow stirring tank 7 is comprised by the tank of 2 steps
- the polymer flocculant injected from the polymer flocculant tank 5 into the slow agitation tank 7 is desirably anionic, and for example, polyacrylamide is suitable.
- polyacrylamide is used as the polymer flocculant, the polyacrylamide is stored in a powder state, and a required amount is injected into the polymer flocculant tank 5 by a feeder (not shown), and the polymer flocculant tank 5 is stirred. What is necessary is just to set it as the structure stirred with the apparatus 5a.
- the magnetic separation unit 8 includes, for example, a magnetic drum 8 a that generates a magnetic force with a permanent magnet such as a neodymium magnet, a scraper 8 b that peels off the magnetic floc FL adsorbed around the magnetic drum 8 a, and water supplied from the slow stirring tank 7. And a water storage tank 8c for storing treated water.
- the magnetic drum 8a is formed in a cylindrical shape and rotates about an axis connecting the centers of both ends of the circle, and the treated water in which a part of the side surface formed between both ends is accumulated in the water storage tank 8c. Configured to soak in.
- the magnetic drum 8a is configured such that a magnetic force is generated on the side surface, and the magnetic floc FL is adsorbed on the side surface immersed in the water to be treated in the water storage tank 8c.
- the scraper 8b is configured such that, for example, a blade-shaped member is in sliding contact with the side surface of the magnetic drum 8a.
- the magnetic floc FL adsorbed on the side surface of the magnetic drum 8a is pulled up from the water to be treated by the rotation of the magnetic drum 8a, and peeled off from the side surface by the scraper 8b.
- the magnetic floc FL peeled off from the side surface of the magnetic drum 8a is sent to the magnetic material recycling apparatus 50 through the magnetic floc collecting pipe 8d together with the water to be treated.
- the treated water from which the magnetic floc FL has been removed in the water storage tank 8c of the magnetic separation unit 8 flows into the purified water tank 10 and is stored as purified water which is the final product.
- the magnetic material reuse device 50 includes a magnetic material recovery device 9, a magnetic flock pump 26 (first pump), a water purification pump 27 (second pump), an inlet switching valve 30, and an outlet switching valve 31. Consists of.
- the magnetic body recovery device 9 is provided with a flow path 9a through which treated water including the magnetic floc FL and purified water sent from the water purification tank 10 are circulated, and uses the magnetic force generated by the magnetic force generator 51 to pass the flow path 9a.
- the magnetic powder is configured to be separated and recovered from the magnetic floc FL circulating with the water to be treated. Details of the magnetic body recovery device 9 will be described later.
- the magnetic floc pump 26 removes the water to be treated including the magnetic floc FL collected from the magnetic drum 8 a of the magnetic separation unit 8 by the scraper 8 b and collected by the magnetic floc collecting pipe 8 d through the inlet switching valve 30.
- This is a pump (first pump) for feeding water to the flow path 9a of the recovery device 9.
- the purified water pump 27 is a pump (second pump) that sends purified water stored in the purified water tank 10 to the flow path 9a of the magnetic body recovery device 9 through the inlet switching valve 30 as cleaning water.
- the inlet switching valve 30 is provided in the inlet part 92a of the flow path 9a of the magnetic substance recovery device 9, and the outlet switching valve 31 is provided in the outlet part 92b of the flow path 9a.
- the inlet switching valve 30 is, for example, an electromagnetic valve that is driven by an actuator such as a motor M, and a first switching state (take-in state) in which the magnetic flock pump 26 (first pump) is connected to the inlet portion 92a of the flow path 9a. ) And the second switching state (cleaning state) in which the water purification pump 27 (second pump) is connected to the inlet portion 92a of the flow path 9a is configured to be selectively switched.
- the water to be treated containing the magnetic flock FL flows from the magnetic floc collecting pipe 8d into the magnetic body recovery device 9, and when the inlet switching valve 30 is switched to the cleaning state, the water purification tank 10
- the purified water cleaning water is configured to flow into the magnetic body recovery device 9.
- the outlet switching valve 31 is, for example, an electromagnetic valve that is driven by an actuator such as a motor M.
- the switching state in which the magnetic body recovery tank 13 is connected to the outlet portion 92b of the flow path 9a and the sludge tank 11 are connected. It is configured to selectively switch to either one of the switching state (discarding state) connected to the outlet portion 92b of the flow path 9a.
- the outlet switching valve 31 is switched to the recovery state, the magnetic powder separated from the magnetic floc FL by the magnetic body recovery device 9 flows into the magnetic body recovery tank 13 and is stored.
- the outlet switching valve 31 is switched to the disposal state, the magnetic body The cleaning liquid or the like that has cleaned the recovery device 9 is configured to flow into the sludge tank 11 and be stored.
- the water purification system S1 is provided with a recovered magnetic substance return line 12 for returning the magnetic powder stored in the magnetic substance recovery tank 13 to the rapid stirring tank 6.
- the recovered magnetic body return line 12 is provided with a recovered magnetic body pump 29, and the magnetic powder stored in the magnetic body recovery tank 13 is sent to the recovered magnetic body return line 12 by the recovered magnetic body pump 29, and the recovered magnetic body is recovered. It flows through the return line 12 and is supplied to the rapid stirring tank 6.
- FIG. 2 is a perspective view showing the configuration of the magnetic body recovery device
- FIG. 2 (a) is a diagram showing a state in which the magnetic force generation unit has moved to one of the magnetic body circulation units
- FIG. It is a figure which shows the state which the part moved to the other magnetic body distribution
- the magnetic body recovery apparatus 9 has two plates 90a and 90b in which a groove-like flow passage 9a is formed on one flat surface 90S. Between the two plates 90a and 90b facing each other in parallel, and the flat plate-like magnetic force generation unit 51 disposed in parallel with the plane 90S of the plates 90a and 90b. Consists of.
- the magnetic force generator 51 is disposed such that a plane for generating a magnetic force (magnetic force generation surface 51S) is substantially parallel to the plane 90S of the two plates 90a and 90b. Further, the magnetic body recovery device 9 is provided with a moving mechanism for moving the magnetic force generating part 51, and the magnetic force generating part 51 is configured to be movable in a direction (predetermined moving direction) parallel to the two plates 90a and 90b. Is done.
- an XYZ coordinate system is virtually set such that the plane 90S of the plates 90a and 90b is the XY plane and the plates 90a and 90b are opposed to each other in the Z-axis direction.
- the magnetic force generator 51 is configured to move in the X-axis direction. That is, the X-axis direction is a predetermined moving direction of the magnetic force generation unit 51.
- the structure of the moving mechanism that moves the magnetic force generation unit 51 is not limited.
- a roller 51b that fits on a guide rail 51a extending in the X-axis direction and moves while rotating is attached to the magnetic force generation unit 51.
- the magnetic force generator 51 may be configured to include a drive device 52 such as an actuator that can move in the X-axis direction.
- the configuration of the driving device 52 is not limited.
- any configuration may be used as long as the rod 52a connected to the magnetic force generation unit 51 is displaced in the X-axis direction by a ball screw mechanism using an electric motor (not shown) as a drive source.
- the rod 52a may be displaced in the X-axis direction by a linear actuator that uses air pressure or hydraulic pressure as a drive source.
- the shape of the flow path 9a formed in the plate 90a (90b) is not limited.
- one end of each of a plurality of parallel straight portions 9L extending in the X-axis direction along the plane 90S is adjacent to one side.
- the other end of each straight line portion 9L is connected to one end of the straight line portion 9L adjacent to the other to form a single flow path 9a formed in a zigzag shape.
- the opening side of the flow path 9a formed in a groove shape in the plane 90S is formed by a flat plate having the same shape as the plate 90a (90b). What is necessary is just to set it as the structure by which it obstruct
- One end of the flow path 9a formed in one plate (for example, plate 90b) is an inlet portion 92a, and one end of the flow path 9a formed in the other plate (for example, plate 90a) is an outlet portion 92b.
- One end where the inlet portion 92a is not formed in the flow path 9a of the plate (for example, the plate 90b) and one end where the outlet portion 92b is not formed in the flow path 9a of the other plate (for example, the plate 90a) are the connecting portion (the connecting pipe 91).
- the flow path 9a of the plate 90a and the flow path 9a of the plate 90b are connected by the connecting pipe 91, and a single flow path 9a that communicates from the inlet portion 92a to the outlet portion 92b is formed in the magnetic body circulation portion 90.
- circulation part 90 similarly comprised is arrange
- the driving device 52 moves the magnetic force generating part 51 in the X-axis direction, so that the magnetic force generating part 51 can reciprocate between the two magnetic material circulation parts 90.
- the magnetic body recovery device 9 formed in this way attracts the magnetic floc FL contained in the water to be treated flowing through the magnetic body circulation section 90 by the magnetic force generated by the magnetic force generation section 51, and the wall surface (pipe) of the flow path 9a.
- the magnetic floc FL is adsorbed on the wall 9a1), and the magnetic floc FL is adsorbed on the tube wall 9a1 of the flow path 9a, the washing water flows through the flow path 9a.
- a shearing force acts on the magnetic floc FL adsorbed on the tube wall 9a1 of the flow path 9a by the washing water flowing through the flow path 9a, and the magnetic powder is separated from the magnetic floc FL by this shearing force.
- the magnetic powder separated from the magnetic floc FL is in a state of being attracted by the magnetic force generated by the magnetic force generation unit 51 and adsorbed to the tube wall 9a1 of the flow path 9a.
- the washing water be circulated through the flow path 9a to flow and collect the magnetic powder.
- the two magnetic body circulation portions 90 are disposed adjacent to each other in the X-axis direction, and the magnetic force generation portion 51 moves between the two magnetic body circulation portions 90.
- the magnetic floc FL contained in the water to be treated is attracted by the magnetic force generated by the magnetic force generation part 51 and adsorbed to the tube wall 9a1 of the flow path 9a, and the other In the magnetic material circulation part 90, the step of eliminating the magnetic force in the flow path 9a and recovering the magnetic powder can proceed simultaneously.
- FIG. 3 is a diagram showing the structure of the magnetic force generation unit
- FIG. 3 (a) is a perspective view showing the configuration of the magnetic force generation unit
- FIG. 3 (b) is a positional relationship between the flow path of the magnetic material circulation unit and the magnetic force generation unit.
- FIG. FIG. 4 is a view showing a wire mesh disposed in the flow path.
- the magnetic force generator 51 is configured by a plurality of permanent magnets 510 having a rectangular planar shape (square or rectangular) and laid in a planar shape parallel to the XY plane.
- the permanent magnet 510 is configured such that one of the rectangular planes is an S pole (S), and the other plane facing the plane of the S pole is an N pole (N).
- S S
- N N
- the permanent magnets 510 aligned in the X-axis direction and the Y-axis direction are preferably arranged so that the S poles and the N poles are alternately arranged on one magnetic force generation surface 51S of the magnetic force generation unit 51. That is, it is preferable that the permanent magnet 510 that directs the south pole and the permanent magnet 510 that faces the north pole are alternately arranged on the same magnetic force generation surface 51S.
- the two magnetic force generation surfaces 51 ⁇ / b> S forming both surfaces of the magnetic force generation unit 51 are reversed in polarity at the positions of the permanent magnets 510. That is, when one magnetic force generation surface 51S is at the position of the S pole (N pole), the other magnetic force generation surface 51S becomes the N pole (S pole).
- the method of fixing the permanent magnet 510 to the magnetic force generator 51 is not limited.
- the permanent magnets 510 are arranged side by side inside a rectangular frame forming the magnetic force generating part 51, and the permanent magnets 510 and the frame in the peripheral part and the adjacent permanent magnets 510 are fixed by an adhesive or the like. There may be.
- each end side along the X-axis direction of the permanent magnet 510 constituting the magnetic force generation unit 51 is a flow path of the magnetic material circulation unit 90 (see FIG. 2A).
- a configuration in which the permanent magnet 510 is provided so as to be disposed at a substantially central portion in the Y-axis direction of the linear portion 9L extending in the X-axis direction in 9a is preferable.
- the position of the end side in contact with the permanent magnet 510 adjacent in the Y-axis direction becomes the position of the straight line portion 9L of the flow path 9a, and further, It is preferable that the permanent magnet 510 is arranged so that the position is substantially the center position of the linear portion 9L in the Y-axis direction.
- the substantially central portion of the flow path 9a is a portion having a strong magnetic force. It becomes. Therefore, the magnetic floc FL contained in the water to be treated flowing through the flow path 9a can be attracted with a strong magnetic force, and the magnetic floc FL can be effectively applied to the tube wall 9a1 (see FIG. 2A) of the flow path 9a. Can be adsorbed.
- circulation part 90 may be sufficient.
- the wire mesh 93 is preferably made of a magnetic material (ferromagnetic material) such as a steel material. With this configuration, the wire mesh 93 can be magnetized by the magnetic force generated by the magnetic force generation unit 51. Moreover, the surface area of the flow path 9a is expanded by providing the wire mesh 93.
- produces magnetic force expands by magnetizing the metal-mesh 93 arrange
- At least a part of the magnetic floc FL contained in the water to be treated flowing through the flow path 9a is attracted to the tube wall 9a1 of the flow path 9a by being attracted by the magnetic force generated by the magnetic force generation unit 51, and the flow path 9a is At least a part of the magnetic floc FL contained in the water to be treated can be configured to be adsorbed to the wire mesh 93 that is magnetized by the magnetic force generated by the magnetic force generation part 51.
- the wire mesh 93 may be arranged along the tube wall 9a1 on the magnetic force generation part 51 side of the flow channel 9a, or may be arranged over the entire peripheral wall of the tubular flow channel 9a. It may be a configuration.
- the present invention is not limited to the wire mesh 93, and the same effect as that of the wire mesh 93 is obtained as long as the member is made of a magnetic material (ferromagnetic material) with a structure that increases the surface area of the flow path 9a.
- FIGS. 5 and 6 are diagrams illustrating a process of recovering magnetic powder with a magnetic material recovery apparatus.
- the collection of the magnetic powder in the magnetic body collecting apparatus 9 will be described (hereinafter, refer to FIGS. 1 to 4 as appropriate).
- recovery apparatus 9 may be sufficient. It may be configured to be executed manually by a person.
- the case where the magnetic substance collection device 9 is controlled by the control device C1 to collect magnetic powder will be described as an example.
- one of the two magnetic body circulation portions 90 provided in the magnetic body recovery device 9 is referred to as a first magnetic body circulation portion 901, and the other as a second magnetic body circulation portion 902. Called.
- the inlet switching valve 30 of the first magnetic body circulation unit 901 is referred to as a first inlet switching valve 301
- the outlet switching valve 31 is referred to as a first outlet switching valve 311
- the inlet switching valve 30 of the second magnetic body circulation unit 902 is referred to as a first.
- the two inlet switching valve 302 and the outlet switching valve 31 are referred to as a second outlet switching valve 312.
- the inlet switching valve 30 (first inlet switching valve 301, second inlet switching valve 302) and outlet switching valve 31 (first outlet switching valve 311, second outlet switching valve 312) are blackened.
- the non-opening state of the flow channel indicates the open state.
- the arrow of the magnetic floc pump 26 indicates the flow of the water to be treated including the magnetic floc FL
- the arrow of the water purification pump 27 indicates the flow of the purified water (wash water)
- the pump without the arrow indicates that the pump is stopped.
- the control device C1 moves the magnetic force generation unit 51 to the first magnetic body circulation unit 901 side as an initial state. Further, the control device C1 switches the first inlet switching valve 301 to the intake state, connects the magnetic flock pump 26 to the inlet portion 92a of the first magnetic body circulation portion 901, and puts the second inlet switching valve 302 into the cleaning state. It switches and connects the purified water pump 27 to the inlet part 92a of the 2nd magnetic body distribution
- the control device C1 drives the magnetic flock pump 26 to supply water to be treated including the magnetic flock FL from the magnetic flock collecting pipe 8d to the flow path 9a of the first magnetic body circulation unit 901.
- the magnetic floc FL contained in the water to be treated flowing through the flow path 9a of the first magnetic body circulation part 901 is disposed on the tube wall 9a1 or the flow path 9a of the flow path 9a by the magnetic force generated by the magnetic force generation part 51. Adsorbed to the wire mesh 93.
- the control apparatus C1 drives the water purification pump 27, and supplies the purified water stored in the water purification tank 10 (Ta.) To the flow path 9a of the 2nd magnetic body distribution part 902 as washing water.
- the magnetic force generation part 51 is located at the position of the first magnetic body circulation part 901, the first inlet switching valve 301 is in the intake state, the second inlet switching valve 302 is in the cleaning state, and the first outlet switching valve 311 is discarded.
- the state where the second outlet switching valve 312 is switched to the recovery state and the magnetic flock pump 26 and the water purification pump 27 are driven is the first state.
- the controller C1 stops the magnetic flock pump 26 when a suitable time has elapsed after driving the magnetic flock pump 26, and the controller C1 stops the purified water pump 27 when a suitable time has elapsed after driving the purified water pump 27.
- the time until the control device C1 stops the magnetic floc pump 26 is until the magnetic floc FL is suitably adsorbed on the tube wall 9a1 of the flow path 9a of the first magnetic body circulation portion 901 or the wire mesh 93.
- the time may be a time set in advance by measurement by experimental measurement or the like.
- the time until the control device C1 stops the water purification pump 27 is the time until all the magnetic powder remaining in the flow path 9a of the second magnetic body circulation unit 902 is washed away by the washing water, and is experimentally measured in advance. What is necessary is just to set it as the time measured and set by.
- the control device C1 switches the first inlet switching valve 301 to the cleaning state and causes the water purification pump 27 to flow through the first magnetic body as shown in FIG. It connects with the entrance part 92a of the part 901. And the control apparatus C1 drives the water purification pump 27, and supplies the purified water stored in the purified water tank 10 to the flow path 9a of the 1st magnetic body distribution part 901 as washing water.
- a shearing force acts on the magnetic floc FL adsorbed on the tube wall 9a1 of the flow path 9a of the first magnetic body flow part 901 or the wire mesh 93 by the washing water flowing through the flow path 9a by the magnetic force generated by the magnetic force generation part 51.
- the magnetic powder is separated from the magnetic floc FL.
- the magnetic powder separated from the magnetic floc FL remains adsorbed on the tube wall 9a1 or the wire mesh 93 of the flow path 9a, and the floc from which the magnetic powder has been separated flows through the flow path 9a together with the washing water and is discharged from the outlet 92b. .
- the first outlet switching valve 311 is in a discarded state, and the floc from which the magnetic powder is separated and the washing water flow into the sludge tank 11.
- the magnetic force generation part 51 is located at the position of the first magnetic body circulation part 901, the first inlet switching valve 301 and the second inlet switching valve 302 are in the cleaning state, the first outlet switching valve 311 is in the discarded state, and the second The state where the outlet switching valve 312 is switched to the recovery state, the magnetic flock pump 26 is stopped and the water purification pump 27 is driven (the state shown in FIG. 5B) is the second state.
- the control device C1 stops the water purification pump 27.
- the time until the control device C1 stops the water purification pump 27 is that the magnetic powder is separated from the magnetic floc FL adsorbed on the tube wall 9a1 of the flow path 9a of the first magnetic body circulation part 901 or the wire mesh 93.
- the time required for the measurement may be set to a time that is measured and set in advance by experimental measurement or the like.
- the control device C1 moves the magnetic force generation unit 51 to the second magnetic body circulation unit 902 side, switches the first outlet switching valve 311 to the recovery state, and magnetic material recovery tank 13 Is connected to the outlet 92b of the first magnetic body circulation part 901. And the control apparatus C1 drives the water purification pump 27, and supplies the purified water stored in the water purification tank 10 to the flow path 9a of the 1st magnetic body distribution part 901 as washing water.
- the control device C1 switches the second inlet switching valve 302 to the intake state, connects the magnetic flock pump 26 to the inlet portion 92a of the second magnetic body circulation portion 902, and discards the second outlet switching valve 312.
- the control device C1 drives the magnetic floc pump 26 to feed water to be treated including the magnetic floc FL from the magnetic floc collecting pipe 8d to the flow path 9a of the second magnetic body circulation portion 902.
- the position of the flow path 9a of the first magnetic body circulation part 901 is lost due to the movement of the magnetic force generation part 51, and the magnetic powder in the flow path 9a is not adsorbed to the tube wall 9a1 or the wire net 93 and is washed together with the cleaning water. Circulate. And magnetic powder is discharged
- the magnetic force generation unit 51 is located at the second magnetic body circulation unit 902, the first inlet switching valve 301 is in the cleaning state, the second inlet switching valve 302 is in the intake state, and the first outlet switching valve 311 is recovered.
- the state where the second outlet switching valve 312 is switched to the discarded state and the magnetic flock pump 26 and the water purification pump 27 are driven is the third state.
- the control device C1 stops the purified water pump 27 when a suitable time has elapsed since the purified water pump 27 was driven. Further, the control device C1 stops the magnetic flock pump 26 when an appropriate time has elapsed since the magnetic flock pump 26 was driven. At this time, the time until the control device C1 stops the magnetic floc pump 26 is until the magnetic floc FL is suitably adsorbed on the tube wall 9a1 of the flow path 9a of the second magnetic body circulation portion 902 or the wire mesh 93. The time may be a time set in advance by measurement by experimental measurement or the like.
- the time until the control device C1 stops the water purification pump 27 is the time until all the magnetic powder remaining in the flow path 9a of the first magnetic body circulation unit 901 is washed away by the washing water, and is experimentally measured in advance. What is necessary is just to set it as the time measured and set by.
- control apparatus C1 switches the 2nd inlet switching valve 302 to a washing
- the control device C1 drives the water purification pump 27 to send the purified water stored in the water purification tank 10 to the flow path 9a of the second magnetic body circulation unit 902 as washing water.
- a shearing force acts on the magnetic floc FL adsorbed on the tube wall 9a1 of the flow path 9a or the wire net 93 of the second magnetic material circulation portion 902 by the washing water flowing through the flow path 9a, and the magnetic powder is separated from the magnetic floc FL.
- the magnetic powder separated from the magnetic floc FL remains adsorbed on the tube wall 9a1 or the wire mesh 93 of the flow path 9a, and the floc from which the magnetic powder has been separated flows through the flow path 9a together with the washing water and is discharged from the outlet 92b. .
- the second outlet switching valve 312 is in a discarded state, and the floc from which the magnetic powder has been separated and the washing water flow into the sludge tank 11.
- the magnetic force generation unit 51 is located at the second magnetic body circulation unit 902, the first inlet switching valve 301 and the second inlet switching valve 302 are in the cleaning state, the first outlet switching valve 311 is in the recovery state, and the second The state where the outlet switching valve 312 is switched to the discarding state, the magnetic flock pump 26 is stopped and the water purification pump 27 is driven (the state shown in FIG. 6B) is the fourth state.
- the control device C1 stops the water purification pump 27.
- the time until the control device C1 stops the water purification pump 27 is that the magnetic powder is separated from the magnetic floc FL adsorbed on the tube wall 9a1 of the flow path 9a of the second magnetic body circulation part 902 or the wire mesh 93.
- the time required for the measurement may be set to a time that is measured and set in advance by experimental measurement or the like.
- the control device C1 moves the magnetic force generation unit 51 to the first magnetic body circulation unit 901 side, switches the second outlet switching valve 312 to the recovery state, and recovers the magnetic body.
- the tank 13 is connected to the outlet part 92b of the second magnetic body circulation part 902. Further, the control device C1 drives the water purification pump 27 to send the purified water stored in the water purification tank 10 to the flow path 9a of the second magnetic body circulation unit 902 as washing water.
- the magnetic field of the flow path 9a of the second magnetic material circulation part 902 disappears due to the movement of the magnetic force generation part 51, and the magnetic powder of the flow path 9a flows through the flow path 9a together with the washing water without being adsorbed on the tube wall 9a1 or the wire mesh 93. To do. And magnetic powder is discharged
- control device C1 switches the first inlet switching valve 301 to the intake state, connects the magnetic flock pump 26 to the inlet portion 92a of the first magnetic body circulation portion 901, and discards the first outlet switching valve 311. And the sludge tank 11 is connected to the outlet part 92b of the first magnetic body circulation part 901. Then, the control device C1 drives the magnetic floc pump 26 to feed water to be treated including the magnetic floc FL from the magnetic floc collecting pipe 8d to the flow path 9a of the first magnetic body circulation portion 901. That is, the control device C1 sets the magnetic body recovery device 9 to the first state.
- the magnetic floc FL flowing through the flow path 9a of the first magnetic body circulation part 901 is attracted to the tube wall 9a1 or the wire net 93 of the flow path 9a by the magnetic force generated by the magnetic force generation part 51.
- control device C1 appropriately switches the inlet switching valve 30 (first inlet switching valve 301, second inlet switching valve 302) and outlet switching valve 31 (first outlet switching valve 311, second outlet switching valve 312). Then, the magnetic force generator 51 is appropriately moved, and the magnetic floc pump 26 and the water purification pump 27 are appropriately set to be driven and stopped, so that the magnetic body recovery device 9 is in the first state, the second state, the third state, and The fourth state is sequentially set, and the magnetic powder is separated and collected from the magnetic floc FL by the magnetic material circulation unit 90 (the first magnetic material circulation unit 901 and the second magnetic material circulation unit 902).
- the magnetic body recovery apparatus 9 (see FIG. 2A) of the present embodiment has the water to be treated containing the magnetic floc FL by the magnetic force generated by the magnetic force generating unit 51 (see FIG. 2A).
- the magnetic powder can be separated and recovered without heating. Therefore, the recovered magnetic powder can be reused without deteriorating the performance of magnetic separation, and the amount of new magnetic powder used can be reduced.
- the collected magnetic powder has a flocculant attached thereto, the surface potential remains positive because it is not heated when the magnetic powder is collected. Therefore, the recovered magnetic powder, like the new flocculant, maintains the flocculation function that neutralizes the suspended solids and the emulsified oil surface (minus potential), and the amount of the new flocculant to be added. Can be reduced.
- this invention is not limited to an above-described Example.
- the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.
- a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of a certain embodiment.
- the shape of the flow path 9a formed in the magnetic body circulation part 90 (see FIG. 2 (a)) of the present embodiment is a plurality formed in parallel with the X-axis direction.
- this shape is not limited.
- it may have a zigzag shape in which a plurality of parallel flow paths extending in the Y-axis direction are connected, or a flow path extending in the X-axis direction and a flow path extending in the Y-axis direction
- the channels 9a may be alternately connected and formed in a rectangular shape or a spiral shape.
- a shearing force is applied to the magnetic floc FL adsorbed on the pipe wall 9a1 (see FIG. 2 (a)) or the wire mesh 93 (see FIG. 4) of the flow path 9a with purified water (wash water) flowing through the flow path 9a.
- purified water wash water
- the structure which makes shear force act with an air flow instead of purified water (washing water) may be sufficient, and even if it is the structure which makes shear force act with a high-speed jet, microbubble, and an ultrasonic wave Good.
- the driving device 52 that moves the magnetic force generator 51 (see FIG. 2A) in the X-axis direction is not limited to the ball screw mechanism or the linear actuator.
- the roller 51b (refer FIG. 2 (a)) fitted to the rail 51a itself may be the structure which rotates with the motive power provided from an electric motor etc. (not shown). Or the structure which the magnetic force generation part 51 is fixed and the magnetic body distribution
- it may be a magnetic force generation unit 51 (see FIG. 2A) composed of an electromagnet.
- the magnetic force generated in the flow path 9a (see FIG. 2A) of the magnetic body circulation unit 90 can be turned on / off by turning on / off the excitation current supplied to the magnetic force generation unit 51.
- the guide rail 51a (see FIG. 2 (a)), the roller 51b (see FIG. 2 (a)), and the driving device 52 (see FIG. 2 (a)) constituting the moving mechanism that moves the section 51 are not necessary.
- the magnetic force generating part 51 is not limited to the one having a planar shape formed by a rectangular permanent magnet 510 (see FIG. 3A).
- the permanent magnet (not shown) of the shape may be spread and configured. Also in this case, it is preferable that the permanent magnet that directs the S pole toward the magnetic force generation surface 51S (see FIG. 3A) and the permanent magnet that directs the N pole toward the magnetic force generation surface 51S are alternately arranged. .
- positioned in the position of the flow path 9a (refer FIG.3 (b)) is preferable.
- FIG. 2 (a) there is a magnetic body circulation part 90 (see FIG. 2 (a)) in which the flow path 9a (see FIG. 2 (a)) is formed only on one side of the magnetic force generation part 51 (see FIG. 2 (a)).
- the two magnetic body circulation portions 90 adjacent in the X-axis direction instead of the two magnetic body circulation portions 90 adjacent in the X-axis direction, only one magnetic body circulation portion 90 may be provided.
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
Description
磁性粉は再利用可能な資源であり、回収して再利用されることが好ましい。
そして、磁力発生部は、隣接する2つの磁性体流通部の一方と他方の間を往復動可能に備わり、磁性体回収装置は、磁力発生部が移動した側の磁性体流通部の流路を被処理水とともに流通する磁性フロックの少なくとも一部を、磁力発生部が発生する磁力で吸引して流路の管壁に吸着させるとともに、移動した側の磁性体流通部の流路に配設される金網を磁化して磁性フロックの少なくとも一部を金網に吸着させ、さらに、流路を流通する洗浄水で、流路の管壁または金網に吸着している磁性フロックにせん断力を作用させて磁性粉を磁性フロックから分離するという特徴を有する。
緩速攪拌槽7では、攪拌装置7aによって被処理水がゆっくりと攪拌され、磁性粉を含んだ状態での凝集が促進されて磁性フロックFLが生成される。
なお、緩速攪拌槽7が2段の槽で構成され、それぞれの槽で被処理水が攪拌装置7aで攪拌されることによって磁性フロックFLを効果的に成長させることができる。
磁気ドラム8aは、例えば、円筒状に形成されて円形の両端部の中心を結ぶ軸線を回転中心として回転し、両端部の間に形成される側面の一部が貯水槽8cに溜まる被処理水に浸るように構成される。
さらに、磁気ドラム8aは、側面に磁力が発生するように構成され、貯水槽8cで被処理水に浸る側面に磁性フロックFLが吸着するように構成される。また、スクレーパ8bは、例えば、ブレード状の部材が磁気ドラム8aの側面に摺接するように構成される。そして、磁気ドラム8aの側面に吸着した磁性フロックFLは磁気ドラム8aの回転によって被処理水から引き上げられ、スクレーパ8bによって側面から剥がされる。磁気ドラム8aの側面から剥がされた磁性フロックFLは、被処理水とともに磁性フロック収集管8dを介して磁性体再利用装置50に送られる。
一方、磁気分離部8の貯水槽8cで磁性フロックFLが取り除かれた被処理水は、最終生成物である浄水として浄水タンク10に流入して蓄えられる。
磁性体回収装置9は、磁性フロックFLを含む被処理水および浄水タンク10から送水される浄水が流通する流路9aが配管され、磁力発生部51が発生する磁力を利用して流路9aを被処理水とともに流通する磁性フロックFLから磁性粉を分離回収するように構成される。磁性体回収装置9の詳細は後記する。
入口切替弁30は、例えば、モータMなどのアクチュエータで駆動する電磁弁であり、磁性フロックポンプ26(第1ポンプ)が流路9aの入口部92aに接続される第1切替状態(取込状態)と、浄水ポンプ27(第2ポンプ)が流路9aの入口部92aに接続される第2切替状態(洗浄状態)と、のいずれか一方に選択的に切り替わるように構成される。入口切替弁30が取込状態に切り替わると磁性フロック収集管8dから磁性体回収装置9に磁性フロックFLを含んだ被処理水が流入し、入口切替弁30が洗浄状態に切り替わると、浄水タンク10から磁性体回収装置9に浄水(洗浄水)が流入するように構成される。
図2(a),図2(b)に示すように、磁性体回収装置9は、一方の平面90Sに溝状の流路9aが形成される2枚のプレート90a,90bが平行に対峙して配置される磁性体流通部90と、平行に対峙する2枚のプレート90a,90bの間に、プレート90a,90bの平面90Sと平行に配置される平板状の磁力発生部51と、を含んで構成される。磁力発生部51は、磁力を発生する平面(磁力発生面51S)が2枚のプレート90a,90bの平面90Sと略平行になるように配設される。また、磁性体回収装置9には、磁力発生部51を移動させる移動機構が備わり、磁力発生部51は、2枚のプレート90a,90bと平行な方向(所定の移動方向)に移動可能に構成される。
また、駆動装置52の構成は限定されるものではない。例えば、図示しない電動機等を駆動源とするボールねじ機構で、磁力発生部51と連結されるロッド52aをX軸方向に変位させる構成であればよい。または、空気圧や油圧を駆動源とするリニアアクチュエータでロッド52aをX軸方向に変位させる構成であってもよい。
なお、図2には説明を容易にするために図示省略してあるが、例えば、プレート90a(90b)と同じ形状の平板等によって、平面90Sに溝状に形成される流路9aの開口側が閉塞されて、プレート90a(90b)に管状の流路9aが形成されている構成とすればよい。
そして、本実施例の磁性体回収装置9には、同様に構成される2つの磁性体流通部90がX軸方向、つまり、プレート90a,90bの平面90Sと平行な方向に隣接して配設される。また、駆動装置52が磁力発生部51をX軸方向に移動させることによって、磁力発生部51が、2つの磁性体流通部90の間で往復動可能となる。
また、磁力発生部51の両面をなす2つの磁力発生面51Sは、それぞれの永久磁石510の位置で極性が反転している。つまり、一方の磁力発生面51SがS極(N極)の位置では、他方の磁力発生面51SはN極(S極)になる。
換言すると、永久磁石510において、Y軸方向(移動方向と直交する方向)に隣接する永久磁石510と接する端辺の位置が流路9aの直線部9Lの位置になり、さらに、当該端辺の位置が、直線部9LのY軸方向の略中央部の位置になるように、永久磁石510が配置されていることが好ましい。
金網93は鋼材などの磁性体(強磁性体)を素材とすることが好ましく、この構成によって、磁力発生部51が発生する磁力で金網93を磁化させることができる。
また、金網93が配設されることによって流路9aの表面積が拡大する。そして、流路9aに配設された金網93が磁化することによって磁力を発生する部分の表面積が拡大し、これによって、流路9aを流通する被処理水に含まれる磁性フロックFLが吸着される表面積が拡大する。したがって、効率よく磁性フロックFLを吸着させることができる。
なお、金網93は、流路9aの磁力発生部51の側の管壁9a1に沿って配設される構成であってもよいし、管状を呈する流路9aの全周壁に亘って配設される構成であってもよい。
また、金網93に限定されず、流路9aの表面積を拡大させる構造で磁性体(強磁性体)の物質を素材とする部材であれば、金網93と同等の効果を奏する。
図5,6を参照して、磁性体回収装置9での磁性粉の回収について説明する(以下、適宜図1~4参照)。
なお、磁性体回収装置9における磁性粉の回収は、浄水システムS1に備わる制御装置C1(Cont.)が磁性体回収装置9を制御して自動的に実行する構成であってもよいし、作業者が手動で実行する構成であってもよい。以下は、制御装置C1によって磁性体回収装置9が制御されて磁性粉を回収する場合を例にして説明する。
また、図5,6において、入口切替弁30(第1入口切替弁301,第2入口切替弁302)および出口切替弁31(第1出口切替弁311,第2出口切替弁312)の黒塗りの流路は非開通の状態を示し、白塗りの流路は開通した状態を示す。
また、図5,6において、磁性フロックポンプ26の矢印は磁性フロックFLを含む被処理水の流れ、浄水ポンプ27の矢印は浄水(洗浄水)の流れを示し、矢印が付されたポンプは駆動し、矢印が付されないポンプは停止していることを示す。
このように、磁力発生部51が第1磁性体流通部901の位置にあり、第1入口切替弁301が取込状態、第2入口切替弁302が洗浄状態、第1出口切替弁311が廃棄状態、第2出口切替弁312が回収状態、にそれぞれ切り替わり、磁性フロックポンプ26と浄水ポンプ27が駆動している状態(図5(a)に示す状態)を第1の状態とする。
このときに、制御装置C1が磁性フロックポンプ26を停止するまでの時間は、磁性フロックFLが第1磁性体流通部901の流路9aの管壁9a1または金網93に好適に吸着されるまでの時間とし、あらかじめ実験計測等で計測されて設定されている時間とすればよい。また、制御装置C1が浄水ポンプ27を停止するまでの時間は、第2磁性体流通部902の流路9aに残存している磁性粉が洗浄水によって全て流されるまでの時間とし、あらかじめ実験計測等で計測されて設定されている時間とすればよい。
このように、磁力発生部51が第1磁性体流通部901の位置にあり、第1入口切替弁301と第2入口切替弁302が洗浄状態、第1出口切替弁311が廃棄状態、第2出口切替弁312が回収状態、にそれぞれ切り替わり、磁性フロックポンプ26が停止して浄水ポンプ27が駆動している状態(図5(b)に示す状態)を第2の状態とする。
また、制御装置C1は、第2入口切替弁302を取込状態に切り替えて、磁性フロックポンプ26を第2磁性体流通部902の入口部92aに接続し、第2出口切替弁312を廃棄状態に切り替えて汚泥タンク11を第2磁性体流通部902の出口部92bに接続する。そして、制御装置C1は磁性フロックポンプ26を駆動して、磁性フロックFLを含む被処理水を磁性フロック収集管8dから第2磁性体流通部902の流路9aに送水する。
また、第2磁性体流通部902の流路9aを流れる被処理水に含まれる磁性フロックFLは、磁力発生部51が発生する磁力によって、流路9aの管壁9a1または金網93に吸着する。
このように、磁力発生部51が第2磁性体流通部902の位置にあり、第1入口切替弁301が洗浄状態、第2入口切替弁302が取込状態、第1出口切替弁311が回収状態、第2出口切替弁312が廃棄状態、にそれぞれ切り替わり、磁性フロックポンプ26と浄水ポンプ27が駆動している状態(図6(a)に示す状態)を第3の状態とする。
このときに、制御装置C1が磁性フロックポンプ26を停止するまでの時間は、磁性フロックFLが第2磁性体流通部902の流路9aの管壁9a1または金網93に好適に吸着されるまでの時間とし、あらかじめ実験計測等で計測されて設定されている時間とすればよい。また、制御装置C1が浄水ポンプ27を停止するまでの時間は、第1磁性体流通部901の流路9aに残存している磁性粉が洗浄水によって全て流されるまでの時間とし、あらかじめ実験計測等で計測されて設定されている時間とすればよい。
このように、磁力発生部51が第2磁性体流通部902の位置にあり、第1入口切替弁301と第2入口切替弁302が洗浄状態、第1出口切替弁311が回収状態、第2出口切替弁312が廃棄状態、にそれぞれ切り替わり、磁性フロックポンプ26が停止して浄水ポンプ27が駆動している状態(図6(b)に示す状態)を第4の状態とする。
つまり、制御装置C1は磁性体回収装置9を第1の状態に設定する。
第1磁性体流通部901の流路9aを流れる磁性フロックFLは磁力発生部51が発生する磁力によって、流路9aの管壁9a1または金網93に吸着する。
また、回収された磁性粉には凝集剤が付着しているが、磁性粉の回収時に加熱されないため表面電位がプラスのままとなる。したがって、回収した磁性粉は新たな凝集剤と同様に、浮遊物質やエマルジョン化した油分の表面(マイナス電位)を中和させる凝集機能が維持された状態にあり新たな凝集剤を追加する量を軽減できる。
また、ある実施例の構成の一部を他の実施例の構成に置き換えることも可能であり、また、ある実施例の構成に他の実施例の構成を加えることも可能である。
9a1 管壁
9L 直線部
26 磁性フロックポンプ(第1ポンプ)
27 浄水ポンプ(第2ポンプ)
30 入口切替弁
51 磁力発生部
51a ガイドレール(移動機構)
51b ローラ(移動機構)
52 駆動装置(移動機構)
90 磁性体流通部
90a,90b プレート
90S 平面
91 連結管(連結部)
92a 入口部
92b 出口部
93 金網
510 永久磁石
N N極
S S極
S1 浄水システム
Claims (3)
- 処理すべき被処理水に磁性粉と凝集剤が添加されて生成された磁性フロックが前記被処理水とともに流通する流路が平面に沿って形成される2枚のプレートが平行に対峙し、2枚の前記プレートのそれぞれの前記流路が連結部で連結されてなる磁性体流通部と、
対峙する2枚の前記プレートの間に、磁力を発生する磁力発生面が当該プレートの平面と平行になるように配設される磁力発生部と、
前記磁力発生部を所定の移動方向に移動させる移動機構と、を有し、
2つの前記磁性体流通部が前記プレートの平面と平行な方向に隣接して配設され、
前記移動方向は、2つの前記磁性体流通部が隣接する方向であって、隣接する2つの前記磁性体流通部の一方と他方の間で前記磁力発生部が往復動可能に前記移動機構が構成され、
前記流路が、前記プレートの平面に沿って前記移動方向に延設される複数の平行な直線部のそれぞれの一端が一方に隣接する前記直線部の一端と接続され、前記直線部のそれぞれの他端が他方に隣接する前記直線部の一端と接続されて、つづら折り状に形成されるとともに強磁性体の素材からなる金網が前記流路に配設される磁性体回収装置と、
2つの前記磁性体流通部の前記流路の入口部にそれぞれ配設され、前記磁性フロックを含む前記被処理水を前記流路に送水する第1ポンプを前記入口部に接続する第1切替状態、または洗浄水を前記流路に送水する第2ポンプを前記入口部に接続する第2切替状態を選択的に切り替える2つの入口切替弁と、を備え、
前記磁性体回収装置は、
前記磁力発生部が移動している側の前記磁性体流通部に形成されている前記流路の前記入口部に配設されている前記入口切替弁が前記第1切替状態に切り替わっているときに、前記第1ポンプによって前記流路に送水される前記被処理水とともに当該流路を流通する前記磁性フロックの少なくとも一部を、前記磁力発生部が発生する前記磁力で吸引して当該流路の管壁に吸着させるとともに、前記磁性フロックの少なくとも一部を前記磁力で磁化する前記金網に吸着させ、
前記磁力発生部が移動している側の磁性体流通部に形成されている前記流路の前記入口部に配設されている前記入口切替弁が前記第2切替状態に切り替わっているときに、前記第2ポンプで前記流路に送水される洗浄水で前記管壁または前記金網に吸着している前記磁性フロックにせん断力を作用させて、前記磁性粉を前記管壁または前記金網に吸着させたまま前記磁性フロックから分離し、
前記磁力発生部が移動していない側の前記磁性体流通部に形成されている前記流路の前記入口部に配設されている前記入口切替弁が前記第2切替状態に切り替わっているときに、前記第2ポンプで前記流路に送水される前記洗浄水で、前記流路に残留している前記磁性粉を前記洗浄水とともに前記流路の出口部から排出するように構成されていること、を特徴とする磁性体再利用装置。 - 前記磁力発生部は、
複数の永久磁石が前記磁力発生面に沿って、前記移動方向および当該移動方向と直交する方向に整列し、同一の前記磁力発生面にS極を向ける前記永久磁石とN極を向ける前記永久磁石が交互に配置されていることを特徴とする請求項1に記載の磁性体再利用装置。 - 前記永久磁石は、前記移動方向と直交する方向に隣接する他の前記永久磁石と接する端辺の位置が、前記磁性体流通部に形成されている前記流路の前記直線部の位置になるように配置されていることを特徴とする請求項2に記載の磁性体再利用装置。
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JPS51126572A (en) * | 1975-01-09 | 1976-11-04 | Asea Ab | Circular filter plate for magnetic separators |
JP2010149103A (ja) * | 2008-11-26 | 2010-07-08 | Sumitomo Electric Ind Ltd | 水処理装置 |
JP2012040536A (ja) * | 2010-08-23 | 2012-03-01 | Hitachi Plant Technologies Ltd | 凝集磁気分離装置 |
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JPS51126572A (en) * | 1975-01-09 | 1976-11-04 | Asea Ab | Circular filter plate for magnetic separators |
JP2010149103A (ja) * | 2008-11-26 | 2010-07-08 | Sumitomo Electric Ind Ltd | 水処理装置 |
JP2012040536A (ja) * | 2010-08-23 | 2012-03-01 | Hitachi Plant Technologies Ltd | 凝集磁気分離装置 |
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