JP2009045562A - Filter type sludge dehydration treatment apparatus and sludge dehydration treatment method using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter type sludge dehydration treatment apparatus capable of acquiring a contamination-free clean liquid, and a filter type sludge dehydration treatment method. <P>SOLUTION: The filter type sludge dehydration treatment apparatus is constituted of a cyclone filter or intermittent backwashing type filter having a drain automatic valve for intermittently discharging a sludge liquid and a filter having a filter element. The filter type sludge dehydration treatment method comprises the intermittent discharge of the sludge liquid treated with the cyclone filter or intermittent backwashing type filter from the drain automatic valve to efficiently perform dehydration by the disc filter in the sludge dehydrator main body of the filter. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a filtration filter type sludge dewatering apparatus and method for obtaining a clean liquid free of dirt.

  Conventionally, as a method for efficiently separating and filtering impurities from waste liquid containing impurities such as sludge, for example, as disclosed in JP-A-2003-225515 (Patent Document 1), a fluid outlet is provided at the shaft core. And having a fluid inlet at a position displaced from the shaft core, supplying a fluid containing fines from the fluid inlet at a predetermined flow rate to generate a spiral, and moving the fines outward in a centrifugal state. A filter device having a filter unit that discharges a fluid from which fines have been separated from the fluid outlet, decelerates the vortex to settle the separated fines, and a sedimentation unit that sediments the fines that settle at the filter unit. Is provided.

  On the other hand, as disclosed in Japanese Patent Laid-Open No. 2000-202215 (Patent Document 2), in a conveyance type filtration apparatus provided with a rotationally driven filtration drum, a liquid to be filtered introduced from an upstream inlet is used. A storage-type filtration device including a storage tank that stores and forms a sloping portion over a discharge port disposed on the upper side on the downstream side, and a conveyor driven by a predetermined track, in a space surrounded by the predetermined track, There has been proposed a conveyance type filtration apparatus in which a filtration drum for allowing a liquid to be filtered to flow inside and a filtration drum and an injection pipe for washing the filtration filter are provided.

  The structure of the cyclone as described in Patent Document 1 generally sends a dirty liquid from the circumferential direction of the upper cylinder by pressure from a pump so that the liquid rotates around the outer circumference of the cylinder with centrifugal force. Moreover, the cylinder is configured such that the diameter of the cylinder decreases toward the lower part, dust having a specific gravity higher than that of the liquid is collected on the outer periphery, and finally falls to the lower part of the outer periphery. On the other hand, the clean liquid with no dust is discharged from the outlet at the top of the center. Further, the dust that has fallen in the lower part is configured to settle in a precipitation tank provided in the lower part.

On the other hand, Patent Document 2 is composed of a filtration drum for filtering dust liquid and a filtration filter. Usually, this filtration filter uses a filtration drum in order to enhance the filtration ability. This filtration drum is filtered by a filtration filter provided on the outer peripheral surface of the rotationally driven filtration drum, and the purified liquid filtered into the filtration drum is temporarily introduced. Then, it is configured to be taken out from the opening on the side surface of the filtration drum.
JP 2003-225515 A JP 2000-202215 A

  On the other hand, a disk filter is used as a filter in addition to the above filtration drum type filter. However, these sludges and sludges having a low specific gravity are difficult to discharge with a scraper of a conveyor. There is a problem that fine sludge floating in water and light specific gravity sludge cannot be taken out of the liquid by putting it on a scraping plate. That is, there is a problem that the sludge escapes into the water together with the liquid when the scraper does not get on the scraper and the scraper comes out of the liquid.

  In order to solve the above-described problems, in the cutting fluid treatment, a cyclone device that discharges intermittently concentrated sludge-containing liquid or an intermittent that uses compressed air pressure that discharges intermittently concentrated sludge-containing liquid or the like. The sludge-containing liquid is efficiently and solid-liquid separated with a backwash type filtration filter with high filtration performance. Moreover, in the cutting fluid treatment, it is an environmentally and economically important issue to circulate and use it as a clean fluid without being replaced and discarded when the cutting fluid becomes dirty. This is because the sludge-containing liquid that has been precisely processed and filtered in the angle cyclone device or intermittent backwash filter filter has low solid-liquid separation performance. As a result, various obstacles due to contamination of cutting fluid, cost increase due to periodic replacement of cutting fluid, and environmental problems are caused.

  In order to solve the problems as described above, the inventor has intensively developed and, as a result, has a cyclone or intermittent backwashing filter that intermittently discharges sludge-containing liquid in the cutting fluid treatment, and a filtration filter having a filtration element. Provides a filter-filter type sludge dewatering treatment device and its treatment method that can dehydrate sludge liquid with a low sludge concentration using a filter-type filter and separate the sludge from the liquid and discharge it outside the liquid. To do.

The gist of the invention is that
(1) A filtration filter type sludge dewatering apparatus comprising a cyclone filter having an automatic drain valve for intermittently discharging sludge liquid or an intermittent backwashing filtration filter, and a filtration filter having a filtration element.

(2) The filtration filter type sludge characterized in that the clean liquid discharge port can be disposed as close as possible to the bottom plate of the sludge dewatering machine main body of the filtration type filter by the configuration of the filtration filter described in (1). Dehydration processing equipment.
(3) Install the drain liquid receiving port from the bottom of the cyclone filter or intermittent backwashing filter with the drain automatic valve that intermittently discharges sludge liquid as described in (1) on the opposite side farthest from the sludge discharge port. In addition, a partition plate for preventing splashing of liquid when discharging from the drain automatic valve is disposed in the drain liquid receiving port as far as the bottom plate of the sludge dewatering machine main body of the filtration filter having a filtration element. A filtration filter type sludge dewatering treatment device.

(4) An air exhaust chamber is provided at the drain liquid receiving port described in (3), and the air exhaust chamber is provided with at least two exhaust chamber partition plates for preventing the liquid from scattering, and only air is provided. The disc filter type sludge dewatering apparatus is configured to discharge the gas from the exhaust port.
(5) In order to prevent splashing during sludge discharge from the conveyor discharge portion on the conveyor inclined portion in the sludge dewatering machine main body of the filtration filter according to any one of (1) to (4) above A filtration filter type sludge dewatering treatment apparatus, wherein an elastic member is suspended and disposed near the bottom plate of the sludge dewatering machine main body of the filtration type filter.

(6) The sludge scraper disposed on the conveyor chain in the sludge dehydrator body of the filtration filter having the filtration element according to any one of (1) to (5) is an elastic member. A filtration filter type sludge dewatering apparatus characterized by the above.
(7) A sludge scraping scraper is disposed in the sludge discharge part at the upper part of the sludge dewatering machine main body of the filtration filter having the filtration element according to any one of (1) to (6). A filtration filter type sludge dewatering treatment device.

(8) A liquid level switch or an overflow port for detecting the liquid level is provided in the sludge dewatering machine main body of the filtration filter having the filtration element according to any one of (1) to (7). A filtration filter type sludge dewatering treatment device.
(9) A filtration filter type sludge dewatering apparatus, wherein the filtration filter according to any one of (1) to (8) is rotated in synchronism with rotation of a sludge scraping plate conveyor.

(10) The sludge liquid processed by the cyclone filter or the intermittent backwash filter is intermittently discharged from the drain automatic valve and efficiently dewatered by the filter in the sludge dehydrator body of the filter. A filtration filter type sludge dewatering method.
(11) The clean liquid discharge port is arranged as close as possible to the bottom plate of the sludge dewatering machine main body of the filtration filter by the filter filter configuration described in (10), thereby improving the sludge scraping efficiency. A filtration filter type sludge dewatering method, wherein both the high sludge is conveyed to a sludge discharge port by a conveyor scraper, drained after being drained on an inclined drainage plate.

  (12) It has a filtration filter which has a filtration element which can obtain the processing accuracy not limited to the processing accuracy of the cyclone filter or intermittent backwashing filter according to the above (10) or (11), and the filtration speed is the above cyclone A filtration filter type sludge dewatering treatment method, characterized in that the filter or the intermittent backwash filtration filter has a filtration area sufficient to process within the time when the next automatic drain valve is opened.

  (13) In the method according to any one of (10) to (12) above, when the drain automatic valve is opened and closed intermittently, the drain automatic valve is opened, the conveyor is operated, and the air from the air pipe is opened. A filtration filter type sludge dewatering treatment method is characterized in that the backwashing by spraying and the operation stoppage of the conveyor are intermittently performed.

  As described above, the filtration filter type sludge dewatering apparatus comprising a cyclone filter having an automatic drain valve for intermittently discharging sludge liquid or an intermittent backwashing filtration filter and a filtration filter having a filtration element according to the present invention. By using it intermittently, it is possible to use a disk filter with a filter element. As a result, the clean liquid discharge port is placed at a low position near the bottom plate of the sludge dehydrator body of the filter filter. It becomes possible to increase the sludge concentration by discharging the clean liquid, and it is possible to discharge only this increased sludge. On the other hand, by recirculating and reusing the clean liquid (generally about 10 μm) that has been separated into solid and liquid, the cutting fluid is not exchanged and the generation of bacteria can be suppressed, and it can be used only by replenishment. In this way, the sludge discharge efficiency is increased, and the industrially excellent effect that can be reduced in equipment and reduced in equipment cost can be achieved.

  The present invention will be described below with reference to the drawings. FIG. 1 is an overall schematic view of a sludge dewatering machine of a disc type filter having a cyclone filter or intermittent backwashing filter for intermittently discharging sludge liquid and a filter element for intermittently treating sludge liquid according to the present invention. is there. Hereinafter, a disk type filter will be mainly described as a filtration filter in the present invention. However, although the present invention will be described mainly focusing on the disk type filter, the present invention is not limited to the disk type filter, and includes a filtration filter such as a filtration drum type filtration filter. As shown in FIG. 1, a cyclone filter or an intermittent backwashing filtration filter chamber 1 made of a sealed cylindrical container is provided, and dirty waste liquid such as waste liquid containing impurities such as sludge is removed from a dirty liquid inlet pipe 2 through a cyclone filter or The filter is allowed to flow into the intermittent backwash filter chamber 1.

  The inflowing waste liquid is moved to the lower part of the cyclone chamber while generating a cyclone flow in the cyclone filter or the intermittent backwashing filter chamber 1, for example, if it is a cyclone filter, and sludge with a high specific gravity is removed to remove the cyclone chamber. Precipitate at the bottom. On the other hand, the filtered clean liquid flows out from the clean liquid discharge pipe 3 provided in the upper part of the cyclone filter or the intermittent backwash type filtration filter chamber 1.

  On the other hand, the sludge from the lower part of the cyclone filter or the intermittent backwashing filter chamber 1 is sludge dehydrator main body of the filtration filter provided intermittently from the drain automatic valve 4 to the lower part of the drain automatic valve 4 from the sludge liquid discharge pipe 5. 6 is sent. In this manner, a certain volume of sludge is discharged intermittently from the drain automatic valve 4. The capacity of the sludge dewatering machine main body 6 of the filtration type filter having the disk filter 7 in this case needs a capacity that can sufficiently accept the sludge content discharged per time.

  That is, the processing accuracy of the cyclone or the intermittent backwashing filter is composed of a disk filter 7 having a filter element that can obtain the same processing accuracy as much as possible, and the filtration speed of the disk filter 7 is the cyclone or the intermittent backwashing filter. Design a filtration area with sufficient margin for processing within the time to open the next drain automatic valve 4.

  In this way, it has a volume that can sufficiently accept a certain amount of discharged liquid, and sludge liquid does not leak from the outside of the sludge dehydrator main body 6 of the filtration filter even if there is a malfunction at a liquid level higher than the certain liquid. An overflow port 8 is provided. This prevents the liquid level from rising due to some failure and overflowing the sludge dehydrator body of the filtration filter. Further, an upper liquid level switch 9 and a lower liquid level switch 10 for detecting the upper limit of the liquid level for electrical detection are provided. If the liquid level in the sludge dewatering machine main body 6 of the filtration filter does not decrease even when it is time for the cyclone or intermittent backwashing filtration filter to perform the next discharge cycle, the above-mentioned liquid level switch 9 issues an alarm. The drain automatic valve 4 is not opened. On the other hand, if the lower limit of the liquid level is detected in the sludge dewatering machine main body 6 of the filtration filter by the sub-surface switch 10, the cyclone filter or the intermittent backwash filtration filter transmits a signal that may perform the next discharge cycle as scheduled. Like that.

  Further, the drain liquid receiving port 11 in the sludge liquid discharge pipe 5 from the drain automatic valve 4 is positioned on the opposite side farthest from the sludge discharge port 12, so that the liquid is scattered when discharged from the drain liquid receiving port 11. A partition plate 13 for preventing scattering is disposed near the bottom plate of the sludge dewatering machine main body 6 of the filtration filter. Further, the disk filter 7 is back-washed by air from an air injection port 15 provided at the tip of the air pipe 14 in the disk filter 7. In addition, a cleaning baffle plate 16 is provided in order to prevent scattering and scattering from the backwash disk filter by air.

  On the other hand, an air exhaust chamber 17 is provided in the drain liquid receiving port 11, and a partition plate 13 is provided in the air exhaust chamber 17 to prevent the liquid from scattering. Further, the air exhaust chamber 17 is disposed above the drain liquid receiving port 11 and is provided with at least two exhaust chamber partition plates 18 having a sealed structure to prevent the liquid from being scattered, so that only air is discharged from the exhaust port 19. Configured.

  After the sludge liquid is sent to the sludge dewatering machine main body 6 of the filtration filter of the disk filter 7, the disk filter 7 is filtered from the disk filter 7 by the natural weight without moving the backwash and the conveyor 20, and the liquid surface is the bottom surface of the disk. Wait until the clean liquid discharge port 21 drops. It is desirable to provide the clean liquid discharge port 21 at the lowest possible point (near the outer periphery of the disk filter) as much as possible. For this purpose, a drum type filter can be considered, but the height of the dehydrated liquid is lowered, the sludge concentration is increased, and the effect of discharging the sludge is increased. The disc filter shown in 1 is better. Further, in order to increase the sludge concentration, the sludge liquid discharged by the intermittent automatic drain valve 4 is made a sludge liquid concentrated to about 20% or less, and then the scraper 22 can be easily discharged. To do.

  The sludge dewatering machine main body 6 of the filtration filter is scraped cleanly in a state where the sludge concentration is high, and the sludge is scraped off by a conveyor 20 with a scraper and conveyed to a slant sludge discharge port 12 and further sludge. Temporary sludge is stagnated on the inclined draining plate 23 slanted obliquely upward at the discharge port 12, and further drained after draining the sludge. Thus, the sludge discharge port 12 can perform further draining of the sludge by installing the inclined draining plate 23 whose tip is inclined upward. Further, the elastic member 26 for preventing splashes at the time of discharging the sludge from the conveyor discharging portion is suspended from the conveyor inclined portion to the vicinity of the bottom plate of the sludge dehydrator main body of the filter. As this elastic member, elastic sandals such as rubber and urethane resin are used.

  Also, since the conveyor scraping plate 22 is likely to adhere to sludge, providing a scrubber 24 that scrapes off the sludge on the surface of the scraping plate 22 at the discharge port makes it easier to scrape off the sludge from the scraping plate. This conveyor scraping plate 22 has a contact portion with the bottom plate to smooth the contact surface with the bottom plate 25 in order to cleanly clean the bottom plate of the sludge dehydrator main body 6 of the filtration filter in order to improve sludge discharge efficiency. A spring plate or an elastic material such as rubber or urethane resin is used.

  Further, the disk filter 7 is rotated in synchronization with the rotation of the conveyor 20. During this rotation, for example, an element clogged with a cleaning nozzle capable of cleaning the upper semicircle of the disk filter 7 by rotation is continuously or intermittently backwashed while the conveyor is rotating to prepare for the next cycle. The backwashing may be either cutting fluid or compressed air, but the disc filter 7 is backwashed by the air from the air injection port 15 provided at the tip of the air pipe 14 at the same time as the operation that does not generate excess cutting fluid and the sludge scraping operation. Is effective. At this time, sludge peeled off from the surface of the disk filter 7 is also discharged by the conveyor scraping plate 22.

  FIG. 2 is an enlarged view of a disk filter portion in the disk filter type sludge dewatering apparatus according to the present invention. As shown in this figure, the disk filter 7 comprises a disk filter drive shaft 27, a disk filter drive wheel 28, and a conveyor idler wheel 29. The conveyor idler wheel 29 is connected to a drive sprocket 31 integral with the drive shaft 30, The drive shaft 30 is rotated by a drive motor 36, and the disk filter 7 is rotated by rotation of the disk filter drive shaft 27 via the conveyor idler wheel 29.

  Although the disk filter 7 is a one-sided disk, a double-sided disk is adopted according to the amount of sludge liquid treatment, but a drum-type filtration filter is also possible. Further, this disk filter uses a filter cloth made of a resin such as a wire mesh, nylon, tetron, or polyester, and an elastic filter cloth is particularly preferable for the release of sludge. Further, a mesh of about 200 to 400 is used for the disk filter. By using such a disk filter, it becomes possible to reduce the residual height of the concentrated liquid collected on the sludge dewatering machine main body bottom plate 25 of the filtration filter as compared with the filtration drum. As a result, the concentrated liquid accumulated in the sludge dewatering machine main body bottom plate 25 of the filtration filter is sufficiently scraped, and the concentration of the concentrated liquid collected in the sludge dewatering machine main body bottom plate 25 of the filtration filter is reduced. This makes it possible to reduce the cost in terms of equipment and size.

                                                                  Further, a baffle plate 16 and a protection box 32 for blocking splashes due to air backwashing are provided on the outer periphery of the air filter disc filter 7 to prevent splashing of the sludge from the conveyor outlet. Further, a rotation seal 33 is provided at the baffle plate 16, the disk filter drive shaft 27 and the processing liquid outlet to prevent the disk filter 7 from leaking. Reference numeral 34 denotes a liquid level when the drain valve is discharged, and reference numeral 35 denotes a lowered liquid level after the drain valve is discharged.

  As described above, in FIG. 1 and FIG. 2, the filter filter type sludge dewatering device has been described, particularly the disk filter type sludge dewatering device as an example. However, this disk filter type sludge dewatering device has a sludge treatment capability and facilities. Although it is extremely excellent, it is not particularly limited to this disk filter type sludge dewatering apparatus, and it is also used in a filter drum type filter or the like, and any filter filter similar to this can be used in the present invention. Is within the range.

Hereinafter, the present invention will be specifically described with reference to examples.
As shown in FIG. 1, a dirty liquid containing impurities such as sludge is caused to flow from a dirty liquid inlet pipe 2 into a cyclone filter or an intermittent backwashing filter chamber 1. In the case of a cyclone filter, for example, in the case of a cyclone filter, sludge moves to the lower part of the cyclone filter chamber while the cyclone flow is generated in the cyclone filter chamber. The drain solution is opened and closed every 5 to 30 minutes. For example, after 5 seconds of natural filtration after the drain valve is opened for 5 seconds, the conveyor is turned on and the filtration filter is continuously or intermittently applied by air from the air outlet provided at the tip of the air pipe. After the cleaning, the sediment is intermittently sent to the sludge dewatering apparatus at a rate of 15 minutes / cycle when the conveyor is turned off. As a result, it is possible to filter with a small filter without using a large sludge dewatering device, and by adopting a disk-type filter, the height of the dewatered liquid can be lowered and the sludge concentration can be increased. As a result, the sludge discharge efficiency can be further increased, and the function as a sludge dehydrator in the filtration type filter can be sufficiently exhibited.

  As described above, the sludge liquid is intermittently discharged by intermittently opening and closing the drain valve by the control by a small sequencer by a series of operations. As a result, it is possible to use a filtration filter type sludge dewatering treatment device that can fully function as a sludge dewatering device, which can be used as a sludge dewatering device, and as a result, the sludge dewatering device of the filtering type filter has no limit on the clean liquid discharge port The sludge concentration is increased by discharging the clean liquid by disposing it at a low position near the bottom plate of the main body. On the other hand, the clean liquid separated into solid and liquid is circulated and reused so that the cutting liquid is not exchanged and the bacteria are removed. Occurrence is suppressed and it can be used. Such a sludge discharge efficiency is enhanced, and the equipment is downsized and equipment costs can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall schematic diagram of a sludge dewatering machine of a disk type filter having a cyclone filter or a filter for intermittently discharging sludge liquid and a filter element for intermittently processing sludge liquid according to the present invention. It is an enlarged view of the disk filter part in the disk filter type sludge dehydration processing apparatus concerning the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cyclone filter or intermittent backwash type filtration filter room 2 Dirty liquid inlet pipe 3 Clean liquid discharge pipe 4 Drain automatic valve 5 Sludge liquid discharge pipe 6 Sludge dehydrator body of filter filter 7 Disc filter 8 Overflow port 9 Switch above liquid level DESCRIPTION OF SYMBOLS 10 Liquid level switch 11 Drain liquid receiving port 12 Sludge discharge port 13 Partition plate 14 Air piping 15 Air injection port 16 Cleaning baffle plate 18 Exhaust chamber partition plate 19 Exhaust port 20 Conveyor 21 Clean liquid discharge port 22 Conveyor scraping plate 23 Inclined water drain Plate 24 Sludge scraping scraper 25 Bottom plate 26 Resilient member 27 Disk filter drive shaft 28 Disk filter drive wheel 29 Conveyor idler wheel 30 Drive shaft 31 Drive sprocket 32 Protection box 33 Rolling seal 34 drain valve discharge when liquid level 35 Drain valve discharge after lowering the liquid surface 36 drive motor


Patent Applicant F-Cist
Attorney: Attorney Shiina

Claims (13)

A filtration filter type sludge dewatering apparatus comprising a cyclone filter having an automatic drain valve for intermittently discharging sludge liquid or an intermittent backwashing type filtration filter, and a filtration filter having a filtration element. A filtration filter type sludge dewatering treatment apparatus characterized in that the clean liquid discharge port can be disposed as close as possible to the bottom plate of the sludge dewatering machine main body of the filtration type filter by the filter filter constitution according to claim 1. A drain receiving port from the bottom of a cyclone filter or intermittent backwashing filter having an automatic drain valve for intermittently discharging sludge liquid according to claim 1 is installed on the opposite side farthest from the sludge discharge port, and the drain Filtration characterized in that a partition plate for preventing splashing of liquid when discharging from the drain automatic valve is disposed near the bottom plate of a sludge dehydrator main body of a filtration filter having a filtration element at a liquid receiving port. Filter sludge dewatering equipment. An air exhaust chamber is provided in the drain liquid receiving port according to claim 3, and the air exhaust chamber is provided with at least two exhaust chamber partition plates for preventing the liquid from scattering, and only air is supplied from the exhaust port. A filtration filter type sludge dewatering apparatus characterized by being configured to discharge. The elastic member is used to prevent splashing during sludge discharge from the conveyor discharge portion on the conveyor inclined portion in the sludge dewatering machine main body of the filtration filter according to any one of claims 1 to 4. A filtration filter type sludge dewatering apparatus, wherein the sludge dewatering apparatus main body of the filter is suspended and arranged near the bottom plate. 6. A filtration comprising a sludge scraper disposed on a conveyor chain in a sludge dewatering machine main body of a filtration filter having the filtration element according to claim 1 as an elastic member. Filter sludge dewatering equipment. A filtration filter type sludge, characterized in that a sludge scraping-off swing scraper is disposed in the sludge discharge part at the top of the sludge dewatering machine main body of the filtration type filter having the filtration element according to any one of claims 1 to 6. Dehydration processing equipment. A filtration filter type sludge, characterized in that a liquid level switch or an overflow port for detecting the liquid level is provided in the sludge dehydrator body of the filtration type filter having the filtration element according to any one of claims 1 to 7. Dehydration processing equipment. A filtration filter type sludge dewatering apparatus, wherein the filtration filter according to any one of claims 1 to 8 is rotated in synchronization with rotation of a sludge scraping plate conveyor. Filtration characterized in that sludge liquid treated with a cyclone filter or intermittent backwash filter is intermittently discharged from the drain automatic valve and efficiently dewatered with a disk filter in the sludge dehydrator body of the filter. Filter sludge dewatering method. By arranging the clean liquid discharge port as close as possible to the bottom plate of the sludge dewatering machine main body of the filter by the filter filter structure according to claim 10, it is possible to improve the sludge scraping efficiency and A filtration filter type sludge dewatering method, wherein the sludge is conveyed to a sludge discharge port by a conveyor scraper, drained after being drained by an inclined drainage plate. It has a filtration filter which has a filtration element which can obtain the processing accuracy not limited to the processing accuracy of the cyclone filter or intermittent backwashing filter of Claim 10 or 11, and the filtration speed is the cyclone filter or intermittent reverse washing A filtration filter type sludge dewatering treatment method, wherein the washing filtration filter has a filtration area sufficient to process within a time when the next drain automatic valve is opened. In the method of any one of Claims 10-12, in opening and closing a drain automatic valve intermittently, opening a drain automatic valve, operation | movement of a conveyor, backwashing by the air injection from an air piping, A filtration filter type sludge dewatering method characterized by intermittently performing an operation stop cycle.

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