KR20070088293A - Magnetic separating purification apparatus and magnetic separating purification method - Google Patents

Abstract

A magnetic separation cleaning apparatus discharging high density sludge stably by well separating magnetic substance even if the water level of a magnetic separating section varies. The magnetic separation cleaning apparatus comprises a rotary filter having a tubular filtration mesh and filtering sludge and magnetic substance from fluid to be treated and containing magnetic substance, a tubular sludge collection rotator opposing to the rotary filter in close proximity thereto in the horizontal direction and conveying sludge and magnetic substance on its surface as the rotator rotates, a magnetic rotator which has an axis in the sludge collection rotator and is composed of a rotator and a plurality of magnets fixed to the circumference of the rotator, where at least the surface on the rotary filter side is arranged in close proximity to the inner circumferential surface of the sludge collection rotator and the sludge is transferred onto the surface of the sludge collection rotator by magnetically holding the magnetic substance filtered by the rotary filter on the surface of the sludge collection rotator, and a scraper for scraping the sludge and magnetic substance being conveyed on the surface of the sludge collection rotator.

Description

Magnetic Separation Purification Device and Magnetic Separation Purification Method {MAGNETIC SEPARATING PURIFICATION APPARATUS AND MAGNETIC SEPARATING PURIFICATION METHOD}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic separation and purification apparatus for the purpose of water purification, solid-liquid separation, and the like. Particularly, the magnetic substance is separated by the membrane and the magnetic separation of the trapped substance is separated against the fluctuation of the water surface of the magnetic separator. The present invention relates to a structure of a magnetic separation and purification device capable of stably discharging high density sludge.

For the purpose of solid-liquid separation or the like, a fine metal mesh or a mesh woven from polymer fibers is used as a water separator, and a flocculant and a magnetic component are added to raw water having foul particles (called) to form a magnetic floc. The magnetic floc is separated into a membrane, and the magnetic floc collected from the membrane is magnetically separated and removed by magnetic field generating means to recover high concentration sludge. This structure is described, for example in Unexamined-Japanese-Patent No. 2002-273261. The membrane separation and purification apparatus constitutes a net from fine lines of stainless steel, polyester fibers, and the like, and has, for example, an opening of a scale of several tens of microns. In order to separate fine contaminants smaller than the projection area and the projection diameter of the opening, for example, alumina, alumina sulfate, polyaluminum chloride, iron polysulfate, and magnetic powder, which are coagulants, are previously added to the raw water and stirred. Magnetic flocs are formed by binding algae, fungi and microorganisms to a size of several hundred microns by flocculants. This magnetic floc cannot pass through an opening with a scale of several tens of microns and is captured and separated with high removal rate, and the water passing through the membrane becomes purified water with higher water quality.

The magnetic flocs collected on the membrane are washed from the membrane by washing water, and the magnetic flocs rectifying near the water surface are magnetically separated by suction by the magnetic force of the magnet stationarily placed near the water surface, and the sludge recovery tank is transported to the sludge recovery tank. Transferred and excluded.

The sludge is finally transported to a disposal site or an incineration plant, or composted, usually by truck.

Japanese Patent No. 3282430 discloses a sewage treatment apparatus for adsorbing and separating magnetic particles in sewage flowing into a sewage treatment tank from a sewage by a magnetic plate disposed in the sewage treatment tank and discharging them out of the sewage treatment tank. A sewage treatment tank provided with an inlet and a discharge outlet of the treated water at the top thereof, a plurality of disc-shaped magnetic bodies arranged in parallel in the sewage of the sewage treatment tank at a predetermined interval on a rotating shaft, and the surfaces of the respective disc-shaped magnetic bodies And a plurality of permanent magnet pieces disposed so as to have opposing magnetic poles become different poles between opposing disk-shaped magnetic bodies, and an endless belt with a scraper, which are rotated and adsorbed onto the surface of the permanent magnet piece. At the same time, scrape off the sludge from above the disc-shaped magnetic material. A sludge scraping device to be installed in the wastewater of the wastewater treatment tank, and a sludge discharge passage which surrounds the scraping device and guides the sludge scraped off by the scraper to the sludge discharge port, and is formed in communication with the sludge discharge passage. The wastewater treatment apparatus which consists of the first-class opening overflowing the process water in the discharge passage is described.

Japanese Laid-Open Patent Publication No. 2002-79353 discloses an apparatus for separating an apparatus comprising a non-magnetic rotating drum having an inner cylinder in which a magnet is arranged at a required position on an outer circumferential surface thereof, and having a throttling roller and a scraper in contact with the rotating drum. A rotating drum type magnetic separation device is described in which all or required portions of the surface of a rotating drum are magnetized to a required depth.

As described above, in the conventional example, since the magnetic suction is carried out from the static magnetic field distribution of the magnet, which is washed from the membrane and rectified near the surface of the magnetic flocs, the surface of the water fluctuates up and down and the magnetic force at the surface is weak. In this case, the removal performance of a large number of magnetic flocs present near the water surface is reduced, the magnetic floc density in the water to be treated is increased, the purification speed by the membrane is lowered, and the purification performance is reduced.

On the other hand, when transporting sludge to a disposal site or incinerator by truck or when composting, the water content is set to about 85% so that water does not leak from the sludge during transportation, and the moisture content is set to activate the microorganisms that decompose organic matter during composting. The water content of the sludge must be made small before transportation and composting so as to be 75%.

Here, when the rate of purification by the membrane decreases and the surface of the water to be treated rises, the water to be treated with the magnetic flocs is subjected to a sludge recovery tank which magnetically separates, removes and recovers the magnetic flocs adjacent to the filtered water tank as high concentration sludge. There is a problem that the dehydration cost increases when the treated water overflows, the sludge recovered at a high concentration is drastically thinned by the treated water into which the sludge becomes low, and the sludge volume increases significantly to decrease the water content.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic separation purification apparatus capable of stably separating magnetic flocs containing magnetic material and stably discharging high-density sludge against fluctuations in the water surface of the magnetic separation unit.

In addition, the present invention prevents the sludge recovered at high concentration from being thinned due to overflow of the treated water when the surface of the treated water rises.

By rotating the magnet used to magnetically separate the magnetic flocs, the magnetic force at the surface position is periodically strong even if the surface fluctuates up and down. As a result, the magnetic flocs existing in the vicinity of the water surface are attracted well. Thereby, the problem that the removal performance of a magnetic floc falls is solved.

In addition, by installing a sewage collecting layer for collecting sewage between the sludge recovery tank and the water tank for filtering the treated water, the surplus treated water flows into the sewage recovery tank when the surface of the treated water rises and flows into the sludge recovery tank. To prevent them. This structure can prevent thin sludge in the sludge recovery tank from being thinned by the water to be treated, so that an increase in sludge volume can be prevented and the dewatering cost required when the water content of the recovered sludge is made smaller. Can solve the problem of increase.

As described above, in the conventional example, since the magnetic suction is carried out from the static magnetic field distribution of the magnet, which is washed from the membrane and rectified near the surface of the magnetic flocs, the surface of the water fluctuates up and down and the magnetic force at the surface is weak. In this case, the removal performance of a large number of magnetic flocs present near the water surface is reduced, the magnetic floc density in the water to be treated is increased, the purification speed by the membrane is lowered, and the purification performance is reduced.

On the other hand, when transporting sludge to a disposal site or incinerator by truck or when composting, the water content is set to about 85% so that water does not leak from the sludge during transportation, and the moisture content is set to activate the microorganisms that decompose organic matter during composting. The water content of the sludge must be made small before transportation and composting so as to be 75%.

Here, when the rate of purification by the membrane decreases and the surface of the water to be treated rises, the water to be treated with the magnetic flocs is subjected to a sludge recovery tank which magnetically separates, removes and recovers the magnetic flocs adjacent to the filtered water tank as high concentration sludge. There is a problem that the dehydration cost increases when the treated water overflows, the sludge recovered at a high concentration is drastically thinned by the treated water into which the sludge becomes low, and the sludge volume increases significantly to decrease the water content.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic separation purification apparatus capable of stably separating magnetic flocs containing magnetic material and stably discharging high-density sludge against fluctuations in the water surface of the magnetic separation unit.

In addition, the present invention prevents the sludge recovered at high concentration from being thinned due to overflow of the treated water when the surface of the treated water rises.

By rotating the magnet used to magnetically separate the magnetic flocs, the magnetic force at the surface position is periodically strong even if the surface fluctuates up and down. As a result, the magnetic flocs existing in the vicinity of the water surface are attracted well. Thereby, the problem that the removal performance of a magnetic floc falls is solved.

In addition, by installing a sewage collecting layer for collecting sewage between the sludge recovery tank and the water tank for filtering the treated water, the surplus treated water flows into the sewage recovery tank when the surface of the treated water rises and flows into the sludge recovery tank. To prevent them. This structure can prevent thin sludge in the sludge recovery tank from being thinned by the water to be treated, so that an increase in sludge volume can be prevented and the dewatering cost required when the water content of the recovered sludge is made smaller. Can solve the problem of increase.

The magnetic separation purifying apparatus constituted by the present invention chemically reacts with a magnetic substance, a flocculant, or a substance to be treated in a fluid to be treated containing a magnetic substance of a substance to be removed, or a fluid containing a non-magnetic substance, and is magnetic Rotatable filtration means having a graduated scale through which the substance or magnetic substance cannot pass, for filtering the substance to be treated containing the magnetism which caused the object to be magnetized by adding an additive which generates an object; and Rotatable magnetic field generating means for magnetically attracting the magnetic material filtered by the filtering means by magnetic force, and magnetic flocs including the magnetic material and sludge on the surface when the magnetically attracted magnetic material moves in the direction of the magnetic field generating means. Rotatable sludge recovery means for loading and recovering, and magnetic field rotating means for rotating the magnetic field generating means. The sludge collection means is configured to move between spaces of the magnitude of the magnetic field strength of the magnetic field generating means, and a scraping means for scraping off the deposit on the sludge collecting means is provided. Moreover, it has the sludge collection means which collect | recovers the said to-be-removed material and a magnetic substance.

In addition, the magnetic separation and purification apparatus constituted by the present invention has a chemical reaction with a magnetic substance and a flocculant, or a substance to be removed, in a fluid to be treated containing a magnetic substance of a substance to be removed, or a fluid containing a pizza substance to be removed. Rotatable filtration means having a scale through which the substance to be removed or the magnetic substance cannot pass, for filtering the object to be treated containing the magnetic substance which has made the object to be magnetic by adding an additive which generates a magnetic object. And magnetic field generating means for magnetically attracting the magnetic material filtered by the filtering means with magnetic force, and sludge recovery means for loading and recovering a magnetic floc on the surface when the magnetically attracted magnetic material moves in the direction of the magnetic field generating means. The sludge collecting means has a structure capable of moving a space having a large magnetic field strength of the magnetic field generating means. Further comprising a scraping means for scraping off the deposit on the sludge collecting means, and collecting the sludge collecting means for recovering the substance to be removed or the magnetic substance, the tank having the filtering means, and the filtering means between the sludge collecting means. It has a overflow water collection means which overflows the said to-be-processed fluid before flowing into.

The above-described magnetic separation purifying apparatus has a deposit conveying means for conveying the deposit on the sludge collecting means in the deposit conveying direction by the scraping means.

According to the present invention, magnetic flocs (including sludge and magnetic material) are separated from each other in a good way against the water fluctuations of the magnetic separator formed between the filtration net [mesh 21] and the sludge recovery rotor 33. There is provided a magnetic separation purifying apparatus which stably generates sludge and can be discharged.

In addition, according to the present invention, since the overflow water collecting device 60 is provided in the water tank 22 even when the surface of the water to be treated rises, the sludge recovered at a high concentration becomes thinned due to the overflow of the water to be treated. none.

1 is a block diagram of a magnetic separation purification system according to an embodiment of the present invention.

2 is a cross-sectional view of a magnetic separation purification apparatus of an embodiment of the present invention.

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a cross-sectional view of a magnetic separation purification apparatus of another embodiment of the present invention.

5 is a cross-sectional view taken along the line A-A of FIG.

6 is a sectional view of a magnetic separation purification apparatus of another embodiment of the present invention.

A magnetic separation purifying apparatus for separating sludge contained in the fluid to be treated by using a magnetic force and purifying the fluid to be processed has a cylindrical filter net installed in a water tank, and the sludge and magnetic material from the fluid to be treated containing magnetic materials. A rotary sludge collecting rotator for filtering the sludge, a cylindrical sludge recovery rotator for placing and transporting sludge and a magnetic substance on a surface thereof in a horizontal direction with respect to the rotary filter, and rotating the sludge and magnetic material; The rotating filter body having a shaft in the whole and consisting of a plurality of magnets provided on the circumference of the rotating body and the rotating body, and at least the side located in the rotary filtration is disposed close to the inner peripheral surface of the sludge recovery rotating body. The sludge is returned to the table of the sludge recovery rotating body by magnetically sucking the magnetic material filtered by And the total magnetic rotor to transfer onto the sludge raking bet scraping the sludge and magnetic substance being conveyed on the surface of the total number of times is configured to include a device.

Further, the magnetic rotating body is disposed eccentric with respect to the sludge collecting rotating body.

In addition, the magnetic rotating body may be arranged concentrically with respect to the sludge collecting rotating body, and in this case, a rotating blade which is rotationally driven by a drive source is provided above the surface of the sludge collecting rotating body.

In addition, the sludge collection rotating body and the magnetic rotating body can be integrated to make the rotation drive source common.

Moreover, the overflow water collection device which flows in the to-be-processed fluid from the said water tank can be provided.

Moreover, the magnetic separation purification method of purifying a to-be-processed fluid by isolate | separating the sludge contained in a to-be-processed fluid using a magnetic force is a feature installed in a water tank and containing a magnetic material by the rotating filter body which has a cylindrical filter network. The sludge and the magnetic material are filtered from the liquid body, and at least a side having an axis in the cylindrical sludge collection rotating body is disposed close to the inner circumferential surface of the sludge collecting rotating body, and the plurality of magnets are arranged circumferentially. The magnetic material filtered by the magnetic rotating body and the rotary filter body and rectified on the water surface of the fluid to be treated between the rotating filter bodies is magnetically sucked onto the surface of the sludge recovery rotating body. A person comprising sludge and magnetic material conveyed onto the surface of the recovered rotating body and conveyed on the surface of the sludge recovered rotating body. Scrape the flag floc.

Further, by arranging the magnetic rotator eccentrically with respect to the sludge recovery rotator, the sludge recovery rotator rotates a large and small space of magnetic strength.

(First embodiment)

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1, 2 and 3. FIG. 2 is an enlarged cross-sectional view of the membrane separation device 14 of FIG. 1, and FIG. 3 is an A-A cross-sectional view of FIG.

In the raw water tank 1, raw water 2, which is the water to be treated containing sludge from which a few millimeters of large dust is removed, is stored, and the raw water 2 is pumped to the pipe 4 by a pump 3 for a predetermined amount. do. A flocculant or a polymer reinforcing agent for providing aluminum ions or iron ions, such as a magnetic component such as iron tetraoxide, a pH adjuster, an aqueous solution such as polyaluminum chloride, iron chloride or ferric sulfate, etc., from the seeding adjusting device 5 Is added to the pipe 4 through the conduit 6, and in the stirring vessel 7, the stirring is carried out at high speed by the stirring blade 9 which is rotationally driven by the motor 8. Floc). Subsequently, a polymer reinforcing agent or the like is added from the polymer adjusting device 11 into the pipe 10 through the conduit 12, and the stirring blade 15 is driven to rotate by the motor 14 of the stirring vessel 13. Slowly stirring at low speed produces treated water 17 before treatment, including magnetic flocs 16 (not shown in FIG. 1) of the order of a few millimeters in size. The to-be-processed fluid is not added but may contain the magnetic substance of the to-be-removed object from the beginning.

The water to be treated 17 thus generated is passed through the conduit 18 to the magnetic separation purification apparatus 19. 2 and 3, the structure of the membrane magnetic separation purification apparatus 19 will be described. On the outer circumferential surface of the rotating drum 20 which is rotated by a driving source (not shown), a filtration filter having an opening having a scale of several micrometers to several tens of micrometers is made of fine wire of stainless steel, fine wire of copper, polyester fiber, or the like. Install the net (21). That is, the filtering net of a cylindrical formation is provided. The rotary filter body is formed by the rotary drum 20 and the net 21.

The water to be treated 17 introduced into the water tank 22 is introduced into the drum 20 through the network 21. At this time, the magnetic floc 16 including sludge and magnetic material in the water to be treated is captured on the inner surface of the net 21, and the water from which the magnetic floc 16 is separated through the net 21 becomes purified water and becomes an opening ( 23, accumulated in the clarification tank 25 through the pipe 24, and discharged out of the system. The power through which the water to be treated 17 passes through the net 21 is a liquid level difference between the water to be treated 17 and the purified water in the drum 20.

On the other hand, in Fig. 2, the magnetic floc 16 is attached to the outer surface of the net 21 that rotates in the counterclockwise direction, is attached, and becomes a deposit and is exposed to the atmospheric portion on the liquid surface.

Purified water in the purification tank (refer to the water tank) 25 is pressurized by the pump 26 to be transferred from the conduit 27 to the shower tube 28, and the shower water is discharged from the inner surface of the mesh 21 to the outer surface side from the hole. . The magnetic flocs 16 accumulated on the outer surface of the net 21 are peeled off by shower water, and the net 21 surface is regenerated. The washed magnetic floc 16 is rectified on the surface of the water 17 to be treated in the water tank 22 between the sludge recovering body described later.

The rotary magnet rotor 29 used as a magnetic field generating means for magnetic separation is bonded to the permanent magnet 31 in a plurality of grooves on the outer circumference, for example, on the circumference of the rotor 30 made of a nonmagnetic material. The rotating body 30 is fixed by the back and the like, and has a structure in which the rotation speed is controlled by the motor 32. The permanent magnet 31 is regularly arranged with a small gap in the circumferential direction and the cylindrical surface direction, and is securely fixed to the rotating body 30.

On the other hand, the sludge conveyance rotating body 33 made of a nonmagnetic material used for conveying magnetically separated magnetic flocs is rotated by controlling the rotational speed by the motor 35 via the shaft 34. At the end, the shaft 34 is supported by the watertight rotation support member 36 to the wall of the water tank 22, and at the other end, the outer periphery of the rotor 33 is watertight via the watertight rotation support member 37. Supported by the wall of 22, the inside of the rotation support member 36 is open | released to the atmosphere. The sludge recovering body 33 is disposed close to the rotational furnace hardness in the horizontal direction. The horizontal direction includes a horizontal type.

The magnet rotor 29 is inserted into the sludge recovery rotor 33 from the atmospheric opening surface of the sludge recovery rotor 33 so that the group of magnetic flocs 16 washed with washing water is rectified, that is, It is installed to approach the position of the rotating drum side. Here, in this embodiment, the shaft center of the sludge collection | recovery rotating body 33 and the shaft center of the rotating body 30 of the magnet rotating body 29 are arrange | positioned alternately. That is, the shaft center of the sludge collection body and the shaft center of the magnet rotating body 29 are eccentric. Although not shown in the figure, the magnet rotor 29 is fixed to a part of the water tank 22 by bolts or the like so as to be located at a predetermined place. The rotation direction of the sludge collection | recovery rotating body 33 and the rotating body 30 is the same direction, and it rotates in the direction which moves the magnetically attracted magnetic floc 16 group to an atmospheric side. The rotation speed of both may be the same or different. In the present embodiment, the rotational speed of the rotating body 30 on the magnet side is greater than that of the recovery rotating body 33. That is, the rotation speed is fast.

In this way, since the magnet rotor 2 placed close to the sludge collection rotor 33 is rotated, the magnetic force at the surface position periodically becomes strong even when the surface of the water to be treated fluctuates up and down, so that it is near the water surface. A large number of magnetic flocs present are preferably magnetically attracted.

The group of magnetic flocs 16 rectified near the washed-out water surface are attracted and moved to the magnet side by the magnetic field of the magnet rotor 29, and rotate the outside of the magnet rotor 29 so as to rotate the outer side of the sludge recovery rotor 33. After being attached to the outer surface, it is exposed to the atmosphere with the rotation of the sludge collection rotating body 33. In the atmosphere, excess moisture in the magnetic floc 16 group flows down the surface of the rotor 33 by gravity, and the magnetic floc 16 group is further concentrated. Here, the moisture content of the magnetic flocs falls to about 97%.

The concentrated magnetic flocs 16 on the sludge recovery rotor 33 surface move by the rotation of the sludge recovery rotor 33. At this time, since the shaft center of the sludge collection rotating body 33 and the shaft center of the rotating body 30 are arranged to be displaced, that is, the magnetic flocs are strongly attracted in the small space because the space of the magnitude of the magnetic field strength is moved, the magnetic rotating body is strongly attracted. Gradually away from (29), the magnetic attraction force rapidly decreases as it is spaced apart from the magnet rotor (29). The magnetic floc 16 group is peeled off on the sludge recovery rotating body 33 surface by the spatula 38 partially supported by the water tank 22 so as to scrape off, and is dropped by gravity to the sludge recovery tank 39 as sludge. Are collected separately.

The discharged sludge is introduced into a dehydration device 41 such as a centrifuge or a belt press through the pipe 40, and the water content is about 85% or less so as not to leak water from the sludge during transportation, and the organic matter at the time of composting is decomposed. High concentration sludge concentrated in a water content of about 75% so as to promote the activation of microorganisms is stored in the sludge tank 43 through the pipe 42. The sludge is transported by truck to a disposal site, an incinerator or a composting plant.

The treated sewage dewatered from the dehydration apparatus enters the treatment sewage tank 45 through the pipe 44, pressurized by the pump 46, and then returns to the raw water tank 1 through the pipe 47, and again to be treated. Is introduced into the process.

In the operation control device 48,

ㆍ Face

Turbidity

ㆍ Temperature

Ph value

Etc. are measured by the sensor 49, and the information is transmitted to the operation control device 48 by the signal line 50. Suitable for generating good magnetic flocs based on that information

ㆍ Addition amount of medicine (pH regulator, magnetic ingredient, flocculant)

Is calculated by the optimum amount calculation program input in advance, and the control information is transmitted to the chemical | medical agent tank 5 via the signal line 51, and an optimal amount is added. At the same time,

ㆍ Rotational Speed of Stirring Motor

ㆍ Commutation time in stirring

Is calculated in the driving control device 48, the control information is transmitted to the motor 8 via the signal line 52, the stirring blade 9 is rotated at the optimum rotational speed, and the signal line 53 is passed. To control the discharge amount of the pump 3 to determine the rectifying time in the stirring vessel.

Also suitable for producing good magnetic flocs

ㆍ Addition amount of medicine (polymer polymer)

Is calculated by the optimum amount calculation program input in advance, and the control information is transmitted to the chemical | medical agent tank 11 via the signal line 54, and an optimal amount is added. At the same time,

ㆍ Rotational Speed of Stirring Motor

Is calculated in the driving control device 48, the control information is transmitted to the motor 14 via the signal line 55, and the stirring blade 15 is rotated at the optimum rotational speed.

On the other hand, in the magnetic separation and purification apparatus 19, the liquid level of the to-be-processed water 17 in the water tank 22 is measured by the sensor 56, and the information is transmitted to the operation control device 48 to the signal line 57. FIG. Based on the information, the rotating drum 20 is positioned so that the liquid level of the water to be treated is approximately the center of the installation position of the magnet rotor 29, that is, the average value of the magnetic field generated by the magnet rotor 29 is at its maximum position. The appropriate rotational speed and the proper speed of the recovery speed of the magnetic floc group 16 are calculated in advance by the optimum amount calculation program, and the control signal is passed through the signal line 58 by a rotating motor (not shown) of the rotating drum. And the transmission to the motor 35 via the signal line 59, and control at the optimum rotation speed.

In order to magnetically attract the group of magnetic flocs 16 cleaned by the magnetic field of the magnet rotor 29, the surface of the water to be treated in the water tank 22 is approximately at the center of the magnetic field of the magnet rotor 29, that is, in FIG. It is preferable to be in the position of AA cross section in it. When the water surface is lower than the position of the A-A cross section, the magnetic floc group 16 can be attached to the surface of the sludge recovery rotor 33 only at the position lower than the water surface. Here, when the magnet rotor 29 is stopped, the magnetic field distribution generated by the magnet rotor 29 is such that the magnetic field distribution of the permanent magnets lined up is nonuniform on the magnet surface, so that the magnetic group provided is generated. The distribution also becomes nonuniform, and nonuniformity of magnetic attraction force occurs.

Therefore, when the said water surface which a large number of the magnetic floc groups 16 wash | cleaned is in the site | part with weak magnetic attraction force, the processing performance which magnetically isolates and collects the magnetic floc 16 group falls. However, in the present embodiment in which the magnet rotor 29 rotates, the magnetic field portion having the strong magnetic field distribution passes through the water section in a short cycle, so that the magnetic flocks 16 of the water surface portion are attracted to the magnetic field. By attaching to the outer surface of the whole 33 and making the magnetic field approximately the same as the moving speed of the sludge recovery rotor 33, the magnetic floc 16 group is rotated while maintaining the magnetic attraction force in the movement method. Since it can be transferred to, it is possible to prevent the recovery performance of the magnetic flocs from deteriorating.

On the contrary, when the water surface is higher than the position of the AA cross section, a large number of magnetic flocs 16 are rectified at the position higher than the water surface, but because the magnetic field is weak, it is difficult to adhere to the surface of the sludge recovery rotating body 33. . Here, when the magnet rotor 29 is stopped, the magnetic field distribution generated by the magnet rotor 29 becomes nonuniform as in the case described above, and nonuniformity of magnetic attraction force occurs. Therefore, when water surface is in the site | part with weak magnetic attraction force, the collection | recovery performance of the magnetic floc group 16 falls. However, in this embodiment in which the magnet 29 rotates, the magnetic field portion having a strong magnetic field distribution passes through the short period at a time corresponding to the shape of the magnet, so that the magnetic flocs 16 of the high sleeping portion are magnetically attracted. By attaching to the outer surface of the sludge collection rotating body 33 and making the magnetic field approximately equal to the moving speed of the sludge collecting rotating body 33, the magnetic floc 16 group is rotated while maintaining the magnetic attraction force in the moving method. 30), it is possible to prevent the magnetic floc recovery processing performance from being lowered.

Further, the liquid level of the water to be treated in the water tank 22 that occurs when the liquid level of the water to be treated in the water tank 22 is lower than the inflow amount due to the lack of the rotational speed of the network 21 or the like When it rises, the overflow water recovery tank 61 is installed in the sludge recovery tank 39 from the treated water side in the water tank 22 so that the to-be-processed water does not overflow the wall 60, and the overflow water is processed wastewater through the piping 62. It enters the tank 45, pressurizes with the pump 46, and returns to the raw water tank 1 through the piping 47.

By this structure, the liquid level of the to-be-processed water in the water tank 22 rises, and the to-be-processed water 17 which crossed the wall 60 does not flow into the sludge tank 39, but flows into the overflow water collection tank 61. FIG. Therefore, the high concentration of sludge recovered in the sludge tank 39 increases the water content due to the inflow of the water to be treated, and the concentration becomes low so that the sludge volume is increased, thereby preventing the increase of the sludge treatment cost.

As apparent from the above description, according to the present embodiment, the magnetic body made of magnet can rotate inside the sludge recovery sludge recovery rotating body 33, so that the magnetic floc group's recovering ability is caused by the nonuniform magnetic attraction force of the magnet. The uniformity is eliminated by eliminating the nonuniformity, and the purification performance can be maintained to improve the purification performance. In particular, according to this structure, it is effective also to avoid the phenomenon which was easy to occur between the rotary filter body and the sludge collection | recovery rotating body 33.

In addition, by installing a overflow water recovery tank between the water treatment tank and the adjacent high concentration sludge recovery tank, when the water level of the water treatment tank rises, the treated water flows into the overflow water recovery tank, and the overflow water does not flow into the high concentration sludge recovery tank. The high concentration sludge recovered in the high concentration sludge recovery tank is thinned by the water to be treated and the sludge volume is increased to prevent an increase in the sludge treatment cost.

(2nd Example)

4 and 5 show another embodiment of the present invention. The same configuration as the previous embodiment is given the same number so as not to duplicate the description. The same applies to other embodiments. 2 and 3 differ from those in FIGS. 2 and 3 in that the outer surface of the rotor 66 of the magnet rotor (corresponding to 29 in the first embodiment) 68 is made larger inside the sludge recovery rotor 33, The magnetic center of the sludge recovery tank 39 on the sludge recovery rotating body 33 by the spatula 38 is made to substantially match the shaft center of the magnet rotor 68 and the sludge recovery rotor 33. The rotary blade 63, which is a mechanical discharge means, is provided at the point. The rotary blade 63 made of a hard-to-attach material such as a fluorinated compound rotates the shaft 65 provided with the sludge discharge blade 64 by a drive source, that is, a motor (not shown). The rotation direction of the sludge collection | recovery rotating body 33 and the magnetic rotating body 68 is the same direction, and it rotates in the direction which moves the magnetically attracted magnetic floc 16 group to an atmospheric side. The rotation speed of both may be the same or different. In the case of this embodiment, since the rotation speed of the magnet rotor 68 on the magnet side is slightly higher than the rotation speed of the recovery rotor 33. That is, the rotation speed is made to be slightly faster.

According to the present embodiment, the magnet 67 constituting the magnet rotor 68 can be disposed in close proximity over the entire circumference inside the sludge recovery rotor 33, so that the water surface described in the first embodiment is Even if the position of the cross section is higher or lower than the position of the AA cross section, the magnet 67 is located near the water surface in contact with the outer surface of the sludge recovery rotating body 33 and the magnet 67 further rotates, so that the magnetic attraction force is strong and uniform. It works. Therefore, the magnetic field portion having a strong magnetic field distribution passes through the water surface in a short period even with respect to the vertical fluctuation of the water surface, so that a large number of magnetic flocs 16 of the surface portion are magnetically attracted to the outer surface of the collecting body 33. The magnetic flocs 16 group can be satisfactorily moved by adhering the magnetic field to approximately the same as the moving speed of the sludge recovery rotor 33 or by advancing the magnetic force in the moving direction first.

In addition, since the part of the spatula 38 of the scraping-out part and the magnet 67 are in a close position, a large magnetic attraction force acts on the magnetic floc 16 on the sludge collection rotating body 33 scraped with the spatula 38. In this state, since the magnetic floc 16 group cannot move on the spatula 38 by its own weight, the magnetic floc 16 moves to the sludge recovery tank 39 side with the sludge discharge blade 64 so as to be spaced apart from the magnet 31, and the magnetic attraction force is reduced. The effect is to make it small and move to its own weight.

Therefore, in the present embodiment, even when the water surface of the water to be treated in the water tank 22 fluctuates, the magnetic flocs can be satisfactorily removed to prevent the deterioration of the purification performance.

(Third Embodiment)

6 shows another embodiment of the present invention. 4 and 5 are different from those in FIGS. 4 and 5 to enlarge the cylindrical magnet rotating body 69 inside the sludge collecting rotating body 33, and the sludge collecting rotating body 33 and the cylindrical magnetic rotating body ( 69 is formed by integrating the bolt 70.

According to this embodiment, since the cylindrical magnet rotor 69 can be rotated by integrating with the sludge recovery rotor 33, the motor for rotating the cylindrical magnet rotor 69 can be omitted, thereby reducing the apparatus cost. There is an effect that can be further reduced.

Moreover, although the case where a permanent magnet was used as a magnetic field generating means was shown, the same effect also arises when using the superconducting electromagnet cooled by the phase conduction electromagnet, a freezer, etc.

In the above embodiment, the case in which the mesh 21 is formed in a drum shape has been described. However, the same effect is obtained even when the network 21 is configured in a disk shape and a plurality of disks are arranged in the longitudinal direction to form an apparatus. Occurs.

(Example 4)

In the first to third embodiments described above, the rotary filter was used, but magnetic sludge, that is, sludge was sucked and loaded on the surface of the sludge recovery rotating body 33 without using the rotary filter. It is also possible.

That is, in this embodiment, a magnetic separation and purification apparatus for separating sludge contained in a processing fluid by using a magnetic force and purifying the processing fluid is provided in a water tank, disposed in a horizontal direction, and on the surface with rotation. And a cylindrical sludge recovery rotator for sucking, stacking and transporting sludge and magnetic material to the sludge recovery rotator, and a plurality of magnets provided on the circumference of the rotator and the rotator at least. A side disposed on the rotary filter body is disposed close to the inner circumferential surface of the sludge recovery rotating body, and the magnetic material filtered by the rotary filter body is magnetically sucked onto the surface of the sludge recovery rotating body to recover the sludge. Magnetic rotating body to be transferred onto the whole surface, scraping off scraping sludge and magnetic material conveyed on the surface of the sludge recovery rotating body It constitutes value.

Also in this structure, since the sludge collection | recovery rotating body 33 and the magnetic body arrange | positioned and rotated in this are comprised not separately but since the magnetic force acting on a magnetic material becomes uniform, adsorption control becomes easier. Moreover, according to this structure, the rotational phase of the sludge collection | recovery rotating body 33 and a magnetic body can be changed easily, and it is convenient for the suction and scraping-out of magnetic sludge.

According to the present invention, it is possible to provide a magnetic separation and purification apparatus capable of separating magnetic flocs containing magnetic material well against fluctuations in the water surface of the magnetic separation unit and stably discharging high density sludge.

Claims (8)

A magnetic separation purifying apparatus for separating sludge contained in a fluid to be treated by using a magnetic force to purify the fluid to be processed, A rotary filter body installed in the water tank and having a cylindrical filtration net for filtering sludge and magnetic material from a fluid to be treated containing magnetic material; A cylindrical sludge recovery rotator which is placed in close proximity to the rotary filter body in a horizontal direction and loads and transports sludge and magnetic material on the surface with rotation; It is composed of a plurality of magnets having a shaft in the sludge recovery rotating body and installed on the circumference of the rotating body, and at least the side positioned on the rotary filter body is disposed close to the inner peripheral surface of the sludge collecting rotating body. A magnetic rotating body for transferring the sludge onto the surface of the sludge collecting rotating body by magnetically sucking the magnetic material filtered by the rotary filtering body onto the surface of the sludge collecting rotating body; And a scraping device for scraping off sludge and magnetic material conveyed on the surface of said sludge recovering rotating body. The magnetic separation purifying apparatus according to claim 1, wherein the magnetic rotating body is disposed eccentrically with respect to the sludge collecting rotating body. The magnetic rotating body according to claim 1, wherein the magnetic rotating body is disposed concentrically with respect to the sludge collecting rotating body, and a rotating blade which is driven to rotate by a driving source is provided on the upper side near the surface of the sludge collecting rotating body. Separation purification device. 4. The magnetic separation and purification device according to claim 3, wherein the sludge collection rotating body and the magnetic rotating body are integrated so that a rotation drive source is common. The magnetic separation purification apparatus according to any one of claims 1 to 4, wherein a overflow water collection device is provided, in which the to-be-processed fluid from said water tank overflows. A magnetic separation purifying apparatus for separating sludge contained in a fluid to be treated by using a magnetic force to purify the fluid to be processed, A cylindrical sludge recovery rotator which is installed in a water tank and is disposed in a horizontal direction and sucks, loads and transports sludge and magnetic material on the surface with rotation; It is composed of a plurality of magnets having a shaft in the sludge recovery rotating body and installed on the circumference of the rotating body, and at least the side positioned on the rotary filter body is disposed close to the inner peripheral surface of the sludge collecting rotating body. A magnetic rotating body for transferring the sludge onto the surface of the sludge collecting rotating body by magnetically sucking the magnetic material filtered by the rotary filtering body onto the surface of the sludge collecting rotating body; And a scraping device for scraping off sludge and magnetic material conveyed on the surface of said sludge recovering rotating body. In the magnetic separation purification method of separating the sludge contained in the fluid to be treated using a magnetic force, and purifying the processing fluid, Filtering sludge and magnetic material from the object to be processed containing the magnetic material by means of a rotary filter body disposed in the water tank and having a cylindrical filtering net; The rotary filter body is formed by a magnetic rotor from a plurality of magnets arranged circumferentially with a shaft center in a cylindrical sludge recovery rotating body, and at least the side positioned at the rotary filter body close to an inner circumferential surface of the sludge recovery rotating body. Magnetic material is filtered by the magnetic material and rectified on the surface of the fluid to be treated with the rotary filter body on the surface of the sludge collection rotating body to transfer the sludge onto the surface of the sludge collecting rotating body. , And a magnetic floc containing a sludge and a magnetic material conveyed on the surface of said sludge recovery rotating body. 8. The magnetic separation purification method according to claim 7, wherein the sludge recovery rotor rotates a space having a large magnetic strength by eccentrically arranging the magnetic rotor with respect to the sludge recovery rotor.

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