JP2009285653A - Filtration and purification system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filtration and separation/purification system for water purification, solid-liquid separation, and the like, having a structure by which particularly separation by filtration of a substance to be separated using a filter can be performed so that the substance can be successfully separated in terms of leakage of the substance because of the filter trouble. <P>SOLUTION: Process water filtered through a filtrating separator (hereinafter, referred to as the former filtrating separator) is filtered again through a latter filtrating separator. The clogging state of the filter of the latter filtrating separator is monitored, so as to detect a substance to be separated that has leaked from the former filtrating separator, issue alerts, and thus enables collection by the former filtrating separator. During this process, the substance to be separated is separated and removed by the latter filtrating separator, so that the leakage problem of the substance to be separated into purified water that is discharged from the latter filtrating separator can be addressed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a filtration separation and purification device for the purpose of water purification, solid-liquid separation, and the like, and in particular, separation by separation of a substance to be separated by a filter is excellently separated against leakage of the substance to be separated due to a filter failure. The present invention relates to a filtration and purification device capable of separating substances.

  For the purpose of solid-liquid separation, a flocculant and magnetic powder are added to raw water with contaminated particles that are substances to be separated. There is a magnetic separation and purification device that collects high-concentration sludge by separating the magnetic flocs with a membrane and magnetically separating and removing the magnetic flocs collected with the membrane by a magnetic field generating means.

  The filtration separation and purification apparatus of Patent Document 1 includes a membrane molecular part having an opening with a mesh size of, for example, several tens of microns, which is formed of a stainless steel fine wire, polyester fiber, or the like. In order to separate fine pollutants smaller than the projected area and projected diameter of the opening, the raw water is mixed with, for example, coagulant vanous acid sulfate, polyaluminum chloride, polyiron sulfate and magnetic powder, A magnetic floc is formed by binding a small solid suspension of algae, algae, fungi, and microorganisms to a size of about several hundred microns with a condensing agent.

  This magnetic floc cannot pass through an opening having an opening of several tens of micrometers, and is captured and separated at a high removal rate. Water that has permeated the membrane becomes purified water with higher water quality. After the magnetic flocs collected on the membrane are washed away from the membrane with washing water, the magnetic flocs that remain in the vicinity of the water surface are magnetically separated by being attracted by the magnetic force of a magnet that is stationaryly placed near the water surface, It is transferred to the sludge collection tank by the sludge transfer means and eliminated. Ultimately, sludge is usually transported to a disposal site or incinerator by a truck for composting.

JP 2002-273261 A

  In the above conventional example, when a part of the filter filter is severely broken beyond the original film size due to corrosion or mechanical damage, the magnetic floc leaks into the purified water that has passed through the filter and the material to be separated is separated. As a result, leakage of added chemicals such as magnetic powder and coagulant added for coagulation and magnetic separation causes a problem of contaminating the water area from which purified water is discharged.

  It is an object of the present invention to provide a filtration and purification device that can separate and remove a substance to be separated well even if the substance to be separated leaks due to a problem such as a filter breakage with respect to a filtering function of the substance to be separated by a filter. It is to provide.

  The object is to filter the fluid to be processed including the object to be removed, the first filtering means having an opening through which most of the object to be removed cannot pass, and the first object to be removed filtered by the first filtering means. The first separation means for separating the first filtration means, the removal object detection means for detecting the removal object that has passed through the first filtration means, and the removal object that transmits detection information from the removal object detection means An object detection information transmitting means, a first peeling means for peeling the first object to be removed filtered by the first filtering means from the first filtering means, and the fluid to be treated filtered by the first filtering means again. This is achieved by having second filtering means for filtering and second peeling means for peeling the second object to be removed filtered by the second filtering means from the second filtering means.

  Further, the object is to filter the fluid to be processed including the object to be removed, the first filtering means having an opening through which most of the object to be removed cannot pass, and the first object filtered by the first filtering means. Detection information is transmitted from the first peeling means for peeling the removed substance from the first filtration means, the removal object detection means for detecting the removal object that has passed through the first filtration means, and the removal object detection means. To-be-removed object detection information transmitting means, first separating means for separating the first object to be removed filtered by the first filtering means from the first filtering means, and first draining means for draining from the first filtering means. A second filtering means for re-filtering the fluid to be treated filtered by the first filtering means, a second draining means for the downstream of the first draining means to bypass the second filtering means, To the second drainage means by the information of the removed matter detection information sending means A conduction control means for controlling the implementation of conduction is achieved by having a second peeling means for peeling the second-be-removed substance is filtered in the second filtering means from said second filtering means.

  According to the present invention, there is provided a filtration and purification device capable of separating and removing a substance to be separated satisfactorily even if the substance to be separated leaks due to a filter breakage or the like regarding the filtration function of the substance to be separated by the filter. it can.

It is a flow figure of the magnetic separation purification apparatus provided with one example of the present invention. It is sectional drawing of the magnetic separation part provided with one Example of this invention. It is AA sectional drawing of FIG. It is sectional drawing of the magnetic separation part provided with the other Example of this invention. It is BB sectional drawing of FIG.

  An embodiment of the present invention will be described below with reference to FIGS.

FIG. 2 is an enlarged cross-sectional view of the filtration separation device 14 of FIG.
3 is a cross-sectional view taken along the line AA in FIG.
In the figure, large millimeters of several millimeters are removed from the raw water storage tank 1, raw water 2 which is a water to be treated having fine substances to be separated, such as oil particles, organic matter, and microorganisms, is stored. A predetermined amount of water is sent to the pipe 4. Coagulant and polymer reinforcement that provide aluminum ions and iron ions such as magnetic powder such as iron tetroxide and pH adjuster, aqueous solution such as polyaluminum chloride, iron chloride and ferric sulfate from seeding agent adjusting device 5 An agent or the like is added into the pipe 4 through the conduit 6 and stirred at a high speed by a stirring blade 9 that is rotationally driven by a motor 8 in a stirring tank 7 to generate a magnetic micro floc of several hundreds of micrometers. Thereafter, a polymer reinforcing agent or the like is added from the polymer agent adjusting device 11 into the pipe 10 through the conduit 12, and is slowly agitated at a low speed with the stirring blade 15 rotated by the motor 14 of the agitation tank 13, A pretreated water 17 containing a magnetic floc 16 (not shown in FIG. 1) having a size of several millimeters is generated.

  The pretreated water 17 thus generated is passed through a conduit 18 to a filtration / separation device 19. The structure of the magnetic membrane separator 19 will be described with reference to FIGS. On the outer peripheral surface of the rotary drum 20 is provided a net 21 serving as a filtration filter having an opening having openings of several micrometers to several tens of micrometers made of stainless steel fine wires, copper fine wires, polyester fibers, or the like.

  The pretreated water 17 flowing into the water tank 22 passes through the net 21 and flows into the drum 121. At this time, the magnetic floc 16 in the pretreated water is captured by the inner surface of the net 21, and the water that has passed through the net 21 and separated from the magnetic floc 16 becomes purified water that is discharged from the opening 23, passes through the pipe 24, and is purified water tank. It collects in 25 and is discharged out of the system. The power that the pretreated water 17 passes through the net 21 is a liquid level difference between the pretreated water 17 and the purified water in the drum 20.

On the other hand, the magnetic floc 16 is filtered and attached to the outer surface of the mesh 21 rotating counterclockwise in FIG. 2, and becomes a deposit and exposed to the atmosphere on the liquid surface.
The purified water in the purified water tank 25 is pressurized by the pump 26 and sent from the conduit 27 to the shower pipe 28, and shower water is blown from the inner surface of the net 21 to the outer surface side through the hole. The magnetic floc 16 accumulated on the outer surface of the net 21 is peeled off by shower water, and the surface of the net 21 is regenerated. The washed-out magnetic floc 16 stays on the surface of the pretreated water 17 in the water tank 22.

  A rotary magnet 29 used as a magnetic field generating means for magnetic separation has a permanent magnet body 31 fixed to a plurality of grooves on an outer surface of a rotating body 30 made of a non-magnetic material with an adhesive or the like. 30 has a structure in which the number of rotations is controlled by a motor 32 to rotate.

  On the other hand, the sludge transfer rotating body 33 made of a non-magnetic material used for transferring the magnetically separated magnetic floc is rotated by a motor 35 via a shaft 34 and rotated. At the end, the shaft 34 is supported by the wall of the water tank 22 by the water-tight rotating support 36, and at the other end, the outer periphery of the rotating body 33 is connected to the water tank through the water-tight rotating support 37. 22, and the inside of the rotating body 33 is open to the atmosphere.

  The magnets 29 are inserted from the air release surface of the rotator 33 into the rotator 33, and are installed so that the magnetic flocs 16 group washed away with washing water stops, that is, approaches the position on the rotating drum side. The Here, in this embodiment, the axis of the rotator 33 and the axis of the rotator 30 are shifted from each other. Although not shown in the drawing, the magnet 29 is fixed to a part of the water tank 22 with a bolt or the like so as to be located at a predetermined place. The rotation direction of the rotator 33 and the rotator 30 is the same direction and rotates in the direction in which the magnetically attracted magnetic flocks 16 group are moved to the atmosphere side. Both rotation speeds may be the same or different. In the case of the present embodiment, the rotational speed of the rotating body 30 on the magnet side is larger than the rotational speed of the rotating body 33. That is, the rotation speed is fast.

  The magnetic flocs 16 group that is washed off and stays in the vicinity of the water surface is attracted and moved to the magnet side by the magnetic field of the magnet 29 and adheres to the outer surface of the rotating body 33 that rotates outside the magnetic field 29. As it rotates, it is exposed to the atmosphere. In the atmosphere, excess water in the magnetic floc 16 group flows down on the surface of the rotating body 33 due to gravity, and the magnetic floc 16 group is further concentrated. Here, the moisture content of the magnetic floc decreases to about 97%.

  The concentrated magnetic flock 16 group on the surface of the rotator 33 is moved by the rotation of the rotator 33. At this time, since the axis of the rotator 33 and the axis of the rotator 30 are arranged so as to deviate from each other, they gradually move away from the magnet 29, whereby the magnetic attractive force is rapidly reduced as the distance from the magnet increases. The group of magnetic flocs 16 is peeled off from the surface of the rotating body 33 by a spatula 38 partially supported by the water tank 22 so as to be scraped off, dropped into the sludge recovery tank 39 by gravity, and separated and collected as sludge. .

  The discharged sludge is introduced into a dewatering device 41 such as a centrifuge or a belt press through a pipe 40, the water content is reduced to about 85% or less so that water does not leak from the sludge during transportation, and organic substances during composting are decomposed. The high-concentration sludge concentrated to about 75% of the moisture content capable of activating the microorganisms to be activated is stored in the sludge tank 43 through the pipe 42. The sludge is transported by truck to a disposal site, incineration plant or composting plant.

The treated sewage dewatered by the dehydrator enters the treated sewage tank 45 through the pipe 44, is pressurized by the pump 46, returns to the raw water tank 1 through the pipe 47, and is again introduced into the pretreatment process. In the operation control device 48, raw water, liquid level, turbidity, temperature, pH value and the like are measured by the sensor 49, and the information is transmitted to the operation control device 48 through the signal line 50. Based on the information, it is the best for producing good magnetic floc. ・ Addition amount of chemicals (pH adjusting agent, magnetic powder, flocculant),
Is calculated by the optimum amount calculation program inputted in advance, and the control information is transmitted to the medicine tank 5 via the signal line 51 to add the optimum amount. At the same time,
The rotation speed of the stirring motor and the stop time in the stirring tank are calculated in the operation control device 48, and the control information is transmitted to the motor 8 via the signal line 52, and the stirring blade 9 is rotated at the optimum rotation speed. , And transmitted via the signal line 53 to control the discharge amount of the pump 3 for determining the stopping time in the stirring tank.

In addition, it is optimal for producing good magnetic floc.
Is calculated by the optimum amount calculation program inputted in advance, and the control information is transmitted to the medicine tank 11 via the signal line 54 to add the optimum amount. At the same time,
The rotation speed of the stirring motor is calculated in the operation control device 48, and the control information is transmitted to the motor 14 via the signal line 55 to rotate the stirring blade 15 at the optimal rotation speed.

  On the other hand, in the filtration / separation device 19, the liquid level of the pretreated water 17 in the water tank 22 is measured by the sensor 56, and the information is transmitted to the operation control device 48 through the signal line 57. Based on the information, the optimal position of the rotary drum 20 is set so that the liquid surface position of the pretreatment water is substantially in the center of the installation position of the magnet 29, that is, the average value of the magnetic field generated by the magnet 29 is at the maximum position. The rotation speed and the appropriate recovery speed of the magnetic flock 16 group are calculated by the optimum amount calculation program inputted in advance, and the control signal is transmitted to the rotation motor (not shown) of the rotary drum via the signal line 58. In addition, the signal is transmitted to the motor 35 via the signal line 59, and each is controlled to an optimum rotational speed.

  In order to magnetically attract the cleaned magnetic flocs 16 group by the magnetic field of the magnet 29, the surface of the pretreated water in the water tank 22 is substantially at the center of the magnetic field of the magnet 29, that is, at the position of the AA cross section in FIG. It is desirable to be. When the water surface is lower than the position of the AA cross section, the magnetic flock 16 group can be attached to the surface of the rotating body 33 only at a position lower than the water surface. Here, when the magnets 29 are stationary, the magnetic field distribution generated by the magnets 29 is not uniform on the magnet surface because each of the arranged permanent magnets has a non-uniform magnetic field distribution. The magnetic field distribution is also non-uniform and the magnetic attractive force is non-uniform.

  Accordingly, when the water surface where a large number of the washed magnetic flocs 16 stays is in a portion where the magnetic attractive force is weak, the processing performance of magnetically separating and recovering the magnetic flocs 16 is deteriorated. However, in the present embodiment in which the magnet 29 rotates, a magnetic field portion having a strong magnetic field distribution is always passed through the water surface portion with a short period. Therefore, a large number of magnetic flocks 16 on the water surface portion are magnetically attracted to rotate the rotating body. By adhering to the outer surface of 33 and making the magnetic field substantially the same as the moving speed of the rotating body 33, the magnetic flocs 16 group can be transferred by the rotating body 30 while maintaining the magnetic attraction force in the moving method. It is possible to prevent the recovery processing performance from deteriorating.

  On the other hand, when the water surface is higher than the position of the AA cross section, a large number of magnetic flocs 16 groups stay at a position higher than the water surface, but adhere to the surface of the rotator 33 because the magnetic field is weak. Hard to do. Here, when the magnet 29 is stationary, the magnetic field distribution generated by the magnet 29 becomes non-uniform and the magnetic attraction force becomes non-uniform as in the case described above. Therefore, when the water surface is at a site where the magnetic attractive force is weak, the collection performance of the magnetic flock 16 group is lowered. However, in the present embodiment in which the magnet 29 rotates, a magnetic field portion having a strong magnetic field distribution is always passed through the water surface portion with a short period, so that the magnetic flocs 16 group on the high water surface portion are magnetically attracted to the rotating body 33. By attaching the magnetic field to the outer surface and making the magnetic field substantially the same as the moving speed of the rotating body 33, the magnetic flocs 16 group can be transferred by the rotating body 30 while maintaining the magnetic attraction force in the moving method. It can prevent that processing performance falls.

  Further, the liquid level of the pretreatment water in the water tank 22 is generated when the amount of filtration in the net 21 is lower than the inflow due to insufficient rotation of the net 21 or the like. When the water rises, an overflow water recovery tank 61 is provided in the sludge recovery tank 39 from the pretreatment water side in the water tank 22 so that the pretreatment water does not overflow the wall 60, and the overflow water passes through the pipe 62. Then, after entering the treated wastewater tank 45 and being pressurized by the pump 46, it returns to the raw water tank 1 through the pipe 47.

  Here, when the mesh 21 is cracked or peeled off due to corrosion, mechanical or stress fatigue, and a gap exceeding the mesh size of the conventional mesh is generated, the magnetic flock passes inside the mesh 21, Leak into purified water. The purified water flows into the optical contaminant detection device 63 through the pipe 24. Here, the magnetic floc in the purified water is detected, and the detection signal is transmitted to the device 48 having the operation control function via the wiring 64. The operation control device 48 recognizes that there is an abnormality in the network 21, notifies the driver of an alarm, sends a control signal to the valve switching device 66 via the wiring 65, and purified water leaked by the magnetic floc. Is guided to the pipe 68 via the control valve 67 in the valve switching device 66 and is sent to the subsequent filtration device 69.

  Here, when the magnetic floc does not leak, the magnetic floc in the purified water is not detected, and the signal is transmitted to the operation control device 48 via the wiring 64. The operation control device 48 recognizes that there is no abnormality in the net 21, sends a control signal to the valve switching device 66 via the wiring 65, and supplies purified water without leakage of magnetic flocs in the valve switching device 66. The water is guided to the pipe 71 via the control valve 70 and discharged outside the system.

  The latter-stage filtration device 69 mainly has a rotary filter 72 in which a net is arranged on the outer surface of the rotating drum, a liquid level detector 73 inside the rotary drum, and a liquid level control function for measuring signals from the liquid level detector 73. Wiring 74 to be transmitted to the operation control device 48, a purified water tank 75 for temporarily storing purified water filtered through a net, a pressurizing pump 76 for pressurizing a part of the purified water, and pressurized purified water Through the piping 77, a cleaning water supply valve switching device 78 for controlling the supply location, a cleaning nozzle 79 for injecting the cleaning water from the outside of the net, a scissor 80 for collecting the cleaning water, and the collected recovery cleaning A recovery washing water tank 82 for collecting water through a pipe 81 and a pump 84 for feeding the recovered washing water to the raw water tank through a pipe 83 are configured.

  The purified water mixed with the magnetic floc flows into the rotary filter 72 through the pipe 68. Here, the purified water is filtered by the rotary filter 72, and the magnetic floc in the purified water is filtered. The filtered purified water is accumulated in the water tank 86, stored in the purified water tank 75, and then discharged out of the system through the pipe 87.

  When magnetic flocs accumulate on the mesh surface of the rotary filter 72, the water flow resistance increases, and the level of the purified water 88 before filtration inside the rotary drum increases. An increase in the level of the purified water 88 is detected by the operation control device 48. When the water level exceeds a predetermined level, the motor (not shown) of the rotary filter 72 is moved, the pump 76 is operated, and cleaning is performed by a control signal from the signal line 90. The valve 89 of the water supply valve switching device 78 is opened, and the wash water is discharged from the nozzle 79.

  When the magnetic floc leaks, the valve 91 is opened under the control of the operation control device 48 and supplied to the shower pipe 28 of the filtration / separation device 19 through the pipe 92. This is because when the purified water mixed with magnetic flocs is used as the washing water, the magnetic flocs cause clogging of the shower tube 28. In this case, the operation of the pump 26 is automatically stopped by a control signal from the operation control device 48. A check device 93 is provided on the AC side of the pump 26 in order to prevent backflow of the washing water.

  The rotary filter 72 rotates, and the magnetic floc accumulated inside is washed away with the washing water from the nozzle 79, and the washing water is collected in the basket 80. The cleaning water is temporarily stored in the recovered cleaning water tank 82 through the pipe 81, and the recovered cleaning water passes through the pipe 83 and is sent to the raw water tank by the pump 84, and returns to the purification system again.

  When the rotary filter 72 is washed and regenerated, the water flow resistance of the rotary filter 72 is reduced, the level of the purified water 88 before filtration inside the rotary drum is lowered, and when the level is below a predetermined level, the operation control device 48 The rotation of the rotary filter 72 is automatically stopped by this control signal.

  The purification system is temporarily stopped, and the mesh 21 is cracked or peeled off due to corrosion, mechanical or stress fatigue, etc., and a portion having a gap exceeding the mesh opening size of the conventional mesh is collected or replaced with a new mesh. When the countermeasure for the cause of leakage of the magnetic floc is completed and the normal purification operation is started, the magnetic floc does not leak into the purified water. The purified water flows into the optical contaminant detection device 63 through the pipe 24. Here, the magnetic floc in the purified water is not detected, and the detection signal is transmitted to the device 48 having the operation control function via the wiring 64. The operation control device 48 recognizes that there is no abnormality in the net 21, sends a control signal to the valve switching device 66 via the wiring 65, and supplies purified water free from leakage of magnetic flocs in the valve switching device 66. It is guided to the pipe 71 via the control valve 70 and discharged out of the purification system, and the operation of the post-stage filtration device 69 is stopped.

  According to this embodiment, the mesh 21 is cracked or peeled off due to corrosion, mechanical or stress fatigue, a gap exceeding the mesh size of the conventional mesh is created, and the magnetic floc passes through the mesh 21. Magnetic floc trapping means that detects leakage of magnetic flocs and allows normal operation even after leakage into the purified water and the purified water quality does not reach the specified value. For example, since the treated water is guided to the filtering device and the magnetic floc can be removed again by the filtering device, the magnetic floc can be prevented from leaking out of the purification system.

  4 and 5 show another embodiment according to the present invention. FIG. 5 is a BB cross section of FIG. 2 and 3 is different from FIGS. 2 and 3 in that a nozzle 96 is provided as a subsequent filter in the opening 23 of the rotary drum 20 serving as an outlet of the purified water filtered by the mesh 21, and the outer periphery of the nozzle 96. The structure is provided with a net 94 for filtering the purified water.

  Here, when the mesh 21 is cracked or peeled off due to corrosion, mechanical or stress fatigue, a gap larger than the mesh opening size of the conventional mesh is generated, and the magnetic floc leaks into the purified water. Purified water containing water flows into the nozzle 96 from the opening 23. The magnetic floc is filtered through the net 94 and the purified water purified again has a high water quality from which the magnetic floc has been removed, and the magnetic floc does not contaminate the environment where the purified water is discharged. The magnetic floc filtered inside the mesh 94 accumulates in the mesh 94. The nozzle 96 rotates integrally with the rotary drum 20 and is washed away with washing water sprayed from a washing nozzle 97 disposed outside the nozzle 96. The washing water that has washed the magnetic floc is disposed inside the nozzle 96. It flows down to 98 and is collected. The cleaning water sprayed from the cleaning nozzle 97 is supplied when the magnetic floc leaks and the filtration resistance of the net 94 increases.

The purified water filtered by the net 94 is dropped and stored in the purified water collection tank 100 and discharged from the piping 99 to the outside of the system. Although not shown in the figure, the cleaning water collected by the tub 98 is returned to the raw water tank 1 through the pipe 101.
The cleaning water supplied to the nozzle 97 is supplied by pressurizing the purified water in the purified water collecting tank 100 with a pump (not shown). The washing water is also supplied to the nozzle 28.

  A water level sensor 102 is disposed in the nozzle 96. When the magnetic floc is captured by the net 94, the resistance of the line clean water increases, and the water level in the nozzle 96 rises. If the water level exceeds a predetermined value, the controller supplies the cleaning nozzle 97 to the cleaning nozzle 97, although not shown. The supply of the cleaning water is automatically started, the cleaning water is jetted from the cleaning nozzle 97, the magnetic floc inside the net 94 is cleaned, the water flow resistance is reduced, and the water level is lowered. When the water level falls below a predetermined level, the supply of cleaning water to the cleaning nozzle 97 is automatically stopped. When the supply of the washing water to the washing nozzle 97 is delayed and the water level in the nozzle 96 further rises, it flows out of the nozzle 96 from the opening 95 of the nozzle 96, and the overflow water of the purified water containing magnetic flocs The water flows down to the overflow water storage tank 103 disposed at the lower part of the opening 95, joins the pipe 101 through the pipe 104, and returns to the raw water layer 1.

  According to the present embodiment, as in the first embodiment, the mesh 21 is cracked or peeled off due to corrosion, mechanical or stress fatigue, and a gap larger than the mesh opening size of the conventional mesh is generated. Passes through the net 21, leaks into the purified water, and even if the quality of the purified water cannot reach a predetermined value, the magnetic floc is provided in the apparatus discharge part of the purified water and is integrated with the net 21. Therefore, the magnetic flocs can be removed again and the magnetic flocs can be prevented from leaking out of the purification system.

  Further, since most of the magnetic floc is filtered and removed by the net 21, the resistance of the purified water through the net 94 is extremely smaller than the resistance of the net 21. Therefore, the net for filtering the purified water is used. The required area of 21 may be much smaller than that of the net 21, and the integration of the nets 21 and 94 has the effect of achieving downsizing of the apparatus.

  Further, by reducing the opening size of the mesh 94 of the mesh 94, it is possible to filter magnetic flocs and objects to be removed that are smaller than the mesh 21, so that even if there is no leakage of the magnetic floc, purified water This has the effect of further improving the water quality.

  DESCRIPTION OF SYMBOLS 20 ... Rotary drum, 21 ... Net, 22 ... Water tank, 30 ... Rotating body, 31 ... Permanent magnet, 94 ... Net, 96 ... Nozzle, 98 ... Spear, 100 ... Purified water collection tank, 102 ... Water level sensor, 103 ... Overflow water storage tank.

Claims (2)

  A first filtering means for filtering a fluid to be treated containing a material to be removed and having an opening through which most of the material to be removed cannot pass, and a first material to be removed that has been filtered by the first filtering means. A first peeling means for peeling from the filtering means; a removal object detecting means for detecting a removal object that has passed through the first filtering means; and a removal object detection information transmission for transmitting detection information from the removal object detection means. Means for separating the first object to be removed filtered by the first filtering means from the first filtering means, and for filtering again the fluid to be treated filtered by the first filtering means. 2. A filtration and purification apparatus, comprising: a second filtration means; and a second peeling means for peeling the second object to be removed filtered by the second filtration means from the second filtration means. A first filtering means for filtering a fluid to be treated containing a material to be removed and having an opening through which most of the material to be removed cannot pass, and a first material to be removed that has been filtered by the first filtering means. A first peeling means for peeling from the filtering means; an object detecting means for detecting an object that has passed through the first filtering means;
To-be-removed object detection information transmitting means for transmitting detection information from the to-be-removed object detecting means, a first peeling means for peeling the first to-be-removed object filtered by the first filtering means from the first filtering means, First drainage means for draining from the first filtration means, second filtration means for filtering again the fluid to be treated filtered by the first filtration means, and downstream of the first drainage means is the second filtration A second drainage means for bypassing the means, a conduction control means for controlling the conduction to the second drainage means based on the information of the removal object detection information transmitting means, and a second object filtered by the second filtration means. A filtration and purification apparatus comprising a second peeling means for peeling the removed substance from the second filtration means.

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