JP2009082822A - Filter separation apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter separation apparatus of simple structure by simplifying piping structure of piping disposed in a drum type filter. <P>SOLUTION: In arrangement structure of a raw water supply pipe 32 and a trapped object discharge pipe 36 disposed in the drum type filter 26, the trapped object discharge pipe 36 is insertedly disposed through the raw water supply pipe 32, a hopper 34 of the trapped object discharge pipe 36 is disposed at an opening 32A formed on an upper face of the raw water supply pipe 32. Namely, the double pipe structure of the raw water supply pipe 32 and trapped object discharge pipe 36 with the former as an outer pipe, and the latter as an inner pipe, eliminates one train from two trains of the conventional piping system, to provide the filter separation apparatus 24 of simple structure. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a filter separation device, and more particularly to a filter separation device that separates and removes magnetic floc in raw water remaining without being collected by a magnetic separation device from raw water by collecting it with a drum type filter.

  2. Description of the Related Art Conventionally, a magnetic separation device is known as a device that removes pollutants present in raw water such as sewage and factory effluent. In this magnetic separation device, a flocculant and magnetic powder are added to raw water to produce a pollutant as a magnetic floc with magnetic properties, and this magnetic floc is adsorbed to a magnetic disk provided with a large number of magnets. This is a device for separating and removing.

  Patent Document 1 discloses a solid-liquid separation device incorporating a magnetic separation device. This magnetic separation device is a separation tank in which a plurality of magnetic disks with magnets attached are arranged at a predetermined interval around a rotating shaft, and a magnetic floc is attracted to the magnetic disk so that it is magnetic from raw water. Remove floc.

On the other hand, Patent Document 2 discloses a filter separation device that uses a drum filter to remove coarse dust in raw water. According to this filter separation device, when raw water is supplied into the drum type filter through the supply pipe, coarse dust remains in the drum type filter, and the coarse dust is removed from the raw water. In addition, a downstream end of the backwash water pipe is disposed above the drum filter, and a backwash water recovery pan is disposed at a position facing the downstream end of the backwash water pipe inside the drum filter. Is provided. With this configuration, when the backwash water is jetted from the lower end of the backwash water pipe, the coarse dust adhering to the drum filter is washed away by the backwash water. And this coarse garbage is collect | recovered by the backwash water collection | recovery pan with backwash water, and is discharged | emitted from a drum type filter.
Japanese Patent Laid-Open No. 10-244424 JP 2004-358343 A

  However, in the filter separation device described in Patent Document 2, in the drum type filter, the supply pipe for supplying raw water and the recovery pipe connected to the backwash water recovery pan are provided in different places. The piping system in the drum type filter is complicated, the structure of the filter separation device is complicated, and there are disadvantages that two waterproof seals for extracting the piping to the outside of the device are required.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a filter separation device having a simple structure by simplifying the piping system structure of the piping disposed in the drum filter. To do.

  In order to achieve the above object, the first aspect of the present invention provides a device main body formed in a box shape and a raw water supplied from the outside of the device main body while being horizontally installed in the device main body. A raw water supply pipe in which a large number of outflow holes are formed on the lower surface to flow out into the apparatus main body, and is rotatably attached to the raw water supply pipe so as to surround the raw water supply pipe, and collects collected material in the raw water. A drum-type filter, a drive unit that rotates the drum-type filter, and a raw water supply pipe that is inserted and disposed, and a collection inlet is disposed in an opening formed on the upper surface of the raw water supply pipe. The collected matter discharge pipe for discharging the collected collected matter to the outside of the apparatus main body, and the water level of the raw water in the apparatus main body is lower than the collected matter inlet of the collected matter discharge pipe. A water level control unit for controlling, The collected matter collected by the filter is dropped when the drum-type filter moves above the collected inlet of the collected discharge pipe, and passes through the collected inlet. It is characterized by being discharged from the collected discharge pipe.

  According to the first aspect of the present invention, in the arrangement structure of the raw water supply pipe and the collected matter discharge pipe arranged in the drum type filter, the collected matter discharge pipe is inserted into the raw water supply pipe and collected. The collected material intake of the material discharge pipe is arranged in an opening formed on the upper surface of the raw water supply pipe. That is, the pipe structure of the raw water supply pipe and the collected discharge pipe is a double pipe structure in which the raw water supply pipe is an outer pipe and the collected discharge pipe is an inner pipe. The system can be reduced to a system, thereby providing a filter separation device with a simple structure. By using one system, only one waterproof seal can be provided, and the risk of deterioration of treated water quality due to leakage can be reduced.

  In addition, if the number of outflow holes (density) formed along the raw water supply pipe is evenly provided, there is a problem that the raw water is supplied to the outflow holes on the back side due to the inertia of the flow. It is desirable to reduce the number (density) from the upstream side to the downstream side of the raw water supply pipe and supply the raw water evenly from the entire outflow hole.

  A second aspect of the present invention is characterized in that, in the first aspect, a bucket is provided inside the drum-type filter to lift up the collected material by rotation of the drum-type filter.

  According to the second aspect of the present invention, of the collected matter collected by the drum filter, coarse solids (solid matter that cannot be agglomerated, organisms having mobility, etc.) are efficiently scraped by the bucket. Then, it is dropped and collected from the upper part of the drum type filter to the collected material intake of the collected material discharge pipe. Without a bucket, coarse solids cannot be lifted up to the collected intake and accumulate at the bottom of the drum filter, but according to the present invention, accumulation of coarse solids inside the drum filter is prevented. The life of the drum type filter can be extended. On the other hand, the fine magnetic flocs that could not be collected by the magnetic separation device are lifted in a clogged form in the filter, and fall to the collected matter inlet by the jet of spray water and are collected.

  Invention of Claim 3 is arrange | positioned in Claim 1 or 2, The said water level control part is arrange | positioned on the outer side of the water level sensor which detects the water level of the said raw | natural water in the said drum type filter, and the said drum type filter, A spray nozzle that eliminates filter clogging by spraying water toward the drum-type filter, and a control unit that controls the amount of water sprayed from the spray nozzle based on water level information from the water level sensor. Features.

  According to the third aspect of the present invention, when the water level detected by the water level sensor exceeds a specified water level, the control unit recognizes that filter clogging has occurred in the drum filter, and the amount of water sprayed from the spray nozzle Control more. Thereby, filter clogging is eliminated and the water level returns to the original good water level. The spray nozzle is preferably disposed at a position where the sprayed water falls to the collected matter inlet of the collected matter discharge pipe. As a result, together with the water sprayed from the spray nozzle, the collected matter causing the filter clogging is discharged through the collected matter discharge pipe.

  By constantly injecting water from the spray nozzle, clogging due to the growth of the collected matter attached to the filter can be prevented, but the water injection operation from the spray nozzle is turned on / off based on the water level detected by the water level sensor. You may perform OFF control. If the water level rises, the raw water containing the collected matter is drained from the collected matter intake port of the collected matter discharge pipe, which is not preferable. Therefore, the specified water level recognized by the control unit is set to a water level slightly below the collected material intake of the collected material discharge pipe.

  It should be noted that even if the rotational speed of the drum-type filter is increased, the cleaned filter surface is fed one after another quickly, so that the water level on the raw water side can be lowered. That is, the rotational speed of the drum filter may be controlled based on the detected water level.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, there is provided a filtered water circulating means for injecting filtered water that has passed through the drum filter from the spray nozzle.

  According to the fourth aspect of the present invention, the filtered water circulating means is provided in the drum type filter, and the filtered water that has passed through the drum type filter is used as water sprayed from the spray nozzle. Thereby, water for spray nozzles can be saved.

  According to a fifth aspect of the present invention, in the first, second, third, or fourth aspect, the magnetic powder and the flocculant are injected into the raw water containing the object to be removed before the filter separation device and stirred. The aggregating device for generating magnetic flocs containing magnetic powder and the magnetic separating device for separating the magnetic flocs generated by the aggregating device by magnetic force are arranged, and the filter separating device is the magnetic separating device The magnetic floc that remains without being separated in step 1 is collected by the drum filter.

  The invention according to claim 5 relates to an invention for a polluted water purification system comprising a coagulation device and a magnetic separation device arranged in front of a drum type filter. That is, the drum type filter collects the magnetic floc remaining without being separated by the magnetic separator using the drum type filter. Thereby, a magnetic floc can be reliably removed from raw | natural water.

  The invention according to claim 6 is the invention according to claim 5, wherein the collected matter discharge pipe of the filter separation device is connected to a front stage portion of the aggregating device, and the magnetic floc collected by the drum filter is It is returned to the aggregating apparatus through a collected matter discharge pipe.

  According to the sixth aspect of the present invention, the collected matter collected by the drum type filter of the filter separation device, that is, the magnetic floc remaining without being separated by the magnetic separation device is returned to the aggregating device. The magnetic powder contained in the floc can be reused as the core of aggregation.

  A seventh aspect of the present invention is characterized in that, in the fifth or sixth aspect, the collected matter discharge pipe is provided with a crushing means for crushing the magnetic floc.

  According to the seventh aspect of the present invention, by providing the crushing means, it is possible to prevent the re-accumulation of coarse solids on the drum-type filter, and the magnetic floc is crushed and refined to agglomerate. It becomes easy to work as a nucleus of aggregation in the apparatus.

  According to the filter separation device of the present invention, the pipe structure of the raw water supply pipe and the collected product discharge pipe in the drum type filter is a double pipe in which the raw water supply pipe is an outer pipe and the collected product discharge pipe is an inner pipe. Since the structure is adopted, the piping system can be reduced from the conventional two systems to one system, whereby a filter separation device having a simple structure can be provided.

  Hereinafter, preferred embodiments of a filter separation device according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a block diagram illustrating a flow in which the filter separation device 24 according to the embodiment is incorporated in the polluted water purification system 10. FIG. 2 is a conceptual diagram of the aggregating device 14, the magnetic separation device 20, and the filter separation device 24 that constitute the contaminated water purification system 10.

  As shown in FIG. 1, in the polluted water purification system 10, raw water is fed by a raw water pump 12 to a rapid stirring tank 14 </ b> A of the aggregating device 14. In addition, a magnetic powder adding device 16 for adding magnetic powder and a flocculant adding device 18 for adding a flocculant are provided in the middle of the pipe connecting the raw water pump 12 and the rapid stirring tank 14A. A flocculant is added to the raw water flowing in the pipe. For example, triiron tetroxide can be preferably used as the magnetic powder. As the flocculant, water-soluble inorganic flocculants such as polyaluminum chloride, iron chloride, ferric sulfate and the like can be preferably used. Although not shown, it is preferable to provide a strainer before the addition of the magnetic powder and the flocculant to the raw water, and remove relatively large dust of about several millimeters with this strainer.

  In the rapid stirring tank 14A, the raw water, the added magnetic powder, and the flocculant are rapidly stirred by the stirring blade 19 that rotates at high speed. Thereby, minute magnetic floc F (also referred to as magnetic micro floc) having a size of about several tens of μm is generated in the rapid stirring tank 14A. The rotational peripheral speed at the tip of the stirring blade 19 is preferably about 1 to 2 m / second. Magnetic micro floc takes in magnetic powder, solid suspended particles in raw water, bacteria, plankton, and the like.

  The raw water containing magnetic micro flocs is sent to the slow stirring tank 14B of the aggregating device 14. Further, a polymer flocculant addition device 21 for adding a polymer flocculant is provided in the vicinity of the communication chamber 14C that communicates the rapid stirring tank 14A and the slow stirring tank 14B, and the raw water flowing through the communication chamber 14C is provided in the raw water. A polymer flocculant is added. As the polymer flocculant, anionic and nonionic ones can be preferably used.

  The slow stirring tank 14B has a stirring blade 19 that rotates the magnetic micro floc and the polymer flocculant at a low speed. By gently stirring the magnetic micro floc and the polymer flocculant by the stirring blade 19, a large magnetic floc F of about several hundred μm to several mm is generated. As shown in FIG. 2, the slow stirring tank 14B is configured as a multistage continuous multistage stirring tank (A, B, C). In this case, the rotation speed of the stirring blades 19 provided in each is set to become lower as it goes from the slow stirring tank A on the upstream side to the slow stirring tank C on the downstream side. As a result, the magnetic micro flocs grow from the slow stirring tank A on the upstream side toward the slow stirring tank C on the downstream side, and the grown magnetic floc F is prevented from being destroyed by the stirring blades 19. it can. For example, as the rotational peripheral speed at the tip of the stirring blade 19, the slow stirring tank A is about 0.5 to 1 m / sec, the slow stirring tank B is about 0.3 to 0.7 m / sec, and the slow stirring is performed. It is preferable that the tank C is about 0.1 to 0.3 m / second.

  As shown in FIG. 2, the aggregating device 14 is preferably configured as a device having an integral structure of a rapid stirring tank 14A, a communication chamber 14C, and a slow stirring tank 14B, but can also be configured by communicating each with a pipe.

  In addition, the rapid agitation tank 14A, the communication chamber 14C, and the slow agitation tank 14B of the aggregating apparatus 14 are evacuated and the raw water is full. Thereby, even if this polluted water purification system 10 is mounted on a ship and the ship is shaken by waves, the raw water does not swell in each tank 14A, 14C, 14B of the agglomeration apparatus 14, and the rapid stirring tank 14A The fluid smoothly flows into the slow stirring tank 14B through the communication chamber 14C.

  The raw water containing the magnetic floc F grown to a predetermined size is sent to the magnetic separation device 20. The magnetic separation device 20 adsorbs and separates the magnetic floc F in the raw water by magnetic force. About 95% of the magnetic floc F in the raw water is separated and removed by the magnetic separation device 20.

  The magnetic floc F removed by the magnetic separation device 20 is reduced to a water content of about 80% by a dehydration device 25 such as a centrifugal separator or a belt press machine, and then disposed in a landfill disposal site, an incineration site, or a compost manufacturing factory, etc. It is transported to a truck and processed.

  On the other hand, the treated water treated by the magnetic separation device 20 is sent to the filter separation device 24.

  In the filter separation device 24, treated water (raw water) is supplied to the inside of the drum filter 26 via the raw water supply pipe 32. The treated water supplied to the inside of the drum filter 26 is filtered by flowing out of the drum filter 26 from the inside to the outside, and the collected matter such as the magnetic floc F remaining in the treated water is about It is removed by a 25 μm mesh filter. As a result, raw water containing contaminants such as garbage, solid suspended particles, bacteria, and plankton is purified.

  The collected matter such as the magnetic floc F attached to the inside of the drum type filter 26 is sprayed from the spray nozzle 28 disposed above the drum type filter 26 toward the drum type filter 26, whereby the drum It falls to a hopper (collected matter intake port of the collected matter discharge pipe) 34 in the mold filter 26 and is discharged out of the filter separation device 24 through the collected matter discharge pipe 36. In this case, part of the treated water purified by the drum filter 26 is returned to the spray nozzle 28 by a circulation pump (filtrated water circulation means) 29 and used as water sprayed from the spray nozzle 28. Further, the collected matter such as the magnetic floc F and the water sprayed from the spray nozzle 28 are returned to the front stage of the raw water pump 12 by the pump 30 connected to the collected matter discharge pipe 36.

  Next, the configuration and characteristics of the filter separation device 24 will be described in detail.

  3 is a cross-sectional view of the filter separation device 24, FIG. 4 is a perspective view showing two piping structures disposed in the filter separation device 24, and FIG. 5 is a cross-sectional view of the drum filter 26. 6 is an enlarged perspective view showing the bucket 64 of the drum type filter 26.

  As shown in FIG. 3, the filter separation device 24 includes a device main body 38, a raw water supply pipe 32, a drum filter 26, a motor (see FIG. 1: drive unit) 40, a collected product discharge pipe 36, a water level control unit 42, and the like. Consists of

  The apparatus main body 38 is formed in a box shape, and the raw water supply pipe 32 is installed in the apparatus main body 38 so as to penetrate in the horizontal direction. 1 are formed in the lower surface of the raw water supply pipe 32 along the axial direction of the raw water supply pipe 32 so that the raw water supplied from the magnetic separation device 20 of FIG. Yes.

  One end of the drum type filter 26 is rotatably attached to the raw water supply pipe 32 via a bearing 44 so as to surround the raw water supply pipe 32 as shown in FIG. 3, and a shaft 46 fixed to the other end is attached to the apparatus main body 38. It is rotatably mounted via a bearing 48. A sprocket 50 is fixed to the shaft 46 as shown in FIG. 1, and a chain 52 wound around the sprocket 50 is wound around a sprocket 54 on the motor 40 side. Therefore, when the motor 40 is driven, the drum-type filter 26 is rotated by the chain drive.

  As shown in FIGS. 3 and 4, the collected discharge pipe 36 is inserted into the raw water supply pipe 32, and a hopper 34 protrudes from a rectangular opening 32 </ b> A formed on the upper surface of the raw water supply pipe 32. Yes.

  As shown in FIG. 3, the water level control unit 42 detects the water level of the raw water in the drum filter 26 from the outside of the apparatus main body 38 using the raw water supply pipe 32, the above-described spray nozzle 28, the water level. And a control unit 60 that controls the amount of water ejected from the spray nozzle 28 based on the water level information from the sensor 56 by controlling the opening degree of the electromagnetic valve 58. The controller 60 controls the raw water level in the apparatus main body 38 to be lower than the upper opening of the hopper 34 of the collected product discharge pipe 36.

  According to the filter separation device 24 configured as described above, the collected matter (including the magnetic floc F remaining without being separated by the magnetic separation device 20) 62 collected by the drum type filter 26 is the drum type filter. It is dropped when it moves above the hopper 34 of the collected matter discharge pipe 36 due to the rotation of 26, and is discharged from the collected matter discharge pipe 36 via the hopper 34.

  Further, the filter separation device 24 is configured such that the collected water discharge pipe 36 is inserted into the raw water supply pipe 32 in the arrangement structure of the raw water supply pipe 32 and the collected material discharge pipe 36 disposed in the drum filter 26. Then, the collected matter inlet 34 of the collected matter discharge pipe 36 is disposed in an opening 32 </ b> A formed on the upper surface of the raw water supply pipe 32. That is, the piping structure of the raw water supply pipe 32 and the collected matter discharge pipe 36 is a double pipe structure in which the raw water supply pipe 32 is an outer pipe and the collected matter discharge pipe 36 is an inner pipe. The number of systems can be reduced from two to one, which can provide a filter separation device 24 with a simple structure, and by using one system, there is only one waterproof seal, reducing the risk of deterioration of treated water quality due to leaks. can do.

  It is preferable to reduce the number (density) of the outflow holes 33 formed along the raw water supply pipe 32 from the upstream side to the downstream side of the raw water supply pipe 32. This is because if the number (density) of the outflow holes is evenly provided, there is a problem that the raw water is supplied to the outflow holes on the back side due to the inertia of the flow.

  On the other hand, as shown in FIGS. 5 and 6, buckets 64, 64... For sweeping coarse solids out of the collected collected matter 62 by rotation of the drum type filter 26 are predetermined inside the drum type filter 26. Are provided in the circumferential direction at intervals of. Thereby, the coarse solid matter out of the collected matter 62 collected by the drum type filter 26 is efficiently lifted up by the buckets 64, 64... And the hopper of the collected matter discharge pipe 36 from the upper part of the drum type filter 26. It falls to 34. By the scraping action of the buckets 62, 62..., Accumulation of coarse solid matter on the drum filter 26 can be prevented, and the life of the drum filter 26 can be extended.

  Further, according to the water level control unit 42 shown in FIG. 3, when the water level in the drum filter 26 detected by the water level sensor 56 exceeds a specified water level, the control unit 60 causes the drum type filter 26 to be clogged with a filter. The opening of the electromagnetic valve 58 is controlled so that the amount of water sprayed from the spray nozzle 28 is increased. Thereby, filter clogging is eliminated and the water level returns to the original good water level. The spray nozzle 28 is preferably disposed at a position where the sprayed water falls to the collected matter inlet 34 of the collected matter discharge pipe 36. As a result, together with the water sprayed from the spray nozzle 28, the collected matter 62 causing the filter clogging is discharged through the collected matter discharge pipe 36.

  It should be noted that even if the rotational speed of the drum-type filter 26 is increased, the cleaned filter surface is fed one after another quickly, so that the water level on the raw water side can be lowered. That is, the rotational speed of the drum filter 26 may be controlled based on the detected water level. For example, the normal rotation speed of the drum filter 26 is 2 to 5 rpm.

  By constantly injecting water from the spray nozzle 28, clogging due to the growth of the collected matter 62 attached to the drum filter 26 can be prevented, but the water injection operation from the spray nozzle 28 is detected by the water level sensor 56. The ON / OFF control may be performed based on the water level. If the water level in the drum filter 26 starts to rise as shown in FIG. 5, the raw water is drained from the hopper 34 of the collected matter discharge pipe 36, which is not preferable. Therefore, the specified water level recognized by the control unit 60 is set to a water level located slightly below the hopper 34 of the collected matter discharge pipe 36.

  In addition, the filter separation device 24 according to the embodiment includes a circulation pump (filtrated water circulation means) 29 that ejects filtered water that has passed through the drum-type filter 26 from a spray nozzle 28. That is, since the filter separation device 24 uses filtered water as water to be sprayed from the spray nozzle 28, the water for the spray nozzle 28 can be saved.

  Further, the filter separation device 24 connects the collected matter discharge pipe 36 of the drum type filter 26 to the front stage portion of the aggregating device 14, and the collected matter 62 collected by the drum type filter 26 is collected. It is configured to return to the aggregating device 14 via 36. Thereby, since the collected matter 62 such as magnetic powder remaining without being separated by the magnetic separation device 20 is returned to the aggregating device 14, the magnetic powder can be reused as an agglomeration nucleus.

  Furthermore, the collected matter discharge pipe 36 is provided with a pump 30 having a crushing function for crushing the collected matter 62.

  The pump 30 with the crushing function can prevent re-accumulation of coarse solids on the drum filter 26 and crush the collected material 62 to make it finer, so that the agglomeration device 14 can agglomerate the nucleus. It will be easier to work as.

Block diagram of a polluted water purification system incorporating the filter separation device of the embodiment Conceptual diagram of the devices that make up the polluted water purification system Cross section of filter separator The perspective view which showed two piping structures arrange | positioned by the filter separation apparatus Cross section of drum type filter Enlarged perspective view showing a drum-type filter bucket

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Polluted water purification system, 12 ... Raw water pump, 14 ... Coagulation apparatus, 14A ... Rapid stirring tank, 14B ... Slow stirring tank, 16 ... Magnetic powder addition apparatus, 18 ... Coagulant addition apparatus, 19 ... Agitation blade, 20 DESCRIPTION OF SYMBOLS ... Magnetic separator, 24 ... Filter separator, 25 ... Dehydrator, 26 ... Drum type filter, 28 ... Spray nozzle, 29 ... Circulation pump, 30 ... Pump, 32 ... Raw water supply pipe, 33 ... Outflow hole, 34 ... Hopper 36 ... Collector discharge pipe, 38 ... Device main body, 40 ... Motor, 42 ... Water level controller, 44 ... Bearing, 46 ... Shaft, 48 ... Bearing, 50 ... Sprocket, 52 ... Chain, 54 ... Sprocket, 56 ... Water level sensor, 58 ... electromagnetic valve, 60 ... control unit, 62 ... collected matter, 64 ... bucket, F ... magnetic floc

Claims (7)

A device body formed in a box shape;
A raw water supply pipe that is installed in the apparatus body in the horizontal direction and has a plurality of outflow holes formed on the lower surface for allowing raw water supplied from the outside of the apparatus body to flow into the apparatus body.
A drum-type filter that is rotatably attached to the raw water supply pipe so as to surround the raw water supply pipe, and collects the collected matter in the raw water;
A drive unit for rotating the drum filter;
A trap that is inserted into the raw water supply pipe and that has a collected material inlet disposed at an opening formed in the upper surface of the raw water supply pipe, and discharges the collected collected material to the outside of the apparatus main body. Waste discharge pipe,
A water level control unit that controls the water level of the raw water in the apparatus main body to be lower than the collected matter intake port of the collected matter discharge pipe,
The collected matter collected by the drum type filter falls when it moves above the collected matter inlet of the collected matter discharge pipe by the rotation of the drum type filter, and passes through the collected matter inlet. The filter separation device is discharged from the collected discharge pipe.   The filter separation device according to claim 1, wherein a bucket is provided inside the drum-type filter to scrape the collected material by rotating the drum-type filter. The water level control unit
A water level sensor for detecting the level of the raw water in the drum filter;
A spray nozzle that is disposed outside the drum-type filter and eliminates filter clogging by spraying water toward the drum-type filter;
A control unit that controls the amount of water sprayed from the spray nozzle based on water level information from the water level sensor;
The filter separation device according to claim 1, comprising:   The filter separation apparatus according to claim 3, further comprising filtered water circulation means for spraying filtered water that has passed through the drum-type filter from the spray nozzle. In the previous stage of the filter separation device,
By injecting and stirring the magnetic powder and the flocculant into the raw water containing the material to be removed, the aggregating apparatus that generates the magnetic floc containing the magnetic powder, and the magnetic floc generated by the aggregating apparatus And a magnetic separation device to be separated by
5. The filter separation device according to claim 1, wherein the filter separation device collects the magnetic floc remaining without being separated by the magnetic separation device by the drum filter. .   The collected matter discharge pipe of the filter separation device is connected to a front stage portion of the aggregating device, and the magnetic floc collected by the drum filter is returned to the aggregating device through the collected matter discharge tube. The filter separator according to claim 5.   The filter separation device according to claim 5 or 6, wherein the collected matter discharge pipe is provided with a crushing means for crushing the magnetic floc.

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