JP4794605B2 - Solid-liquid separation cleaning system - Google Patents

Description

  The present invention, for example, swirls sewage containing filter materials such as gravel and sand laid in a filter pond such as a water purification plant, and separates the dust and water contained in the sewage, and the filter media This is related to a solid-liquid separation and washing system that can be recycled and recycled.

  In general, a filtration pond provided in a water purification plant is a structure in which a filter medium is formed by laying a filter medium on the upper surface of a support layer, and raw water is permeated through the filter layer to remove turbidity (suspended substances, sludge, etc.) In the filtration pond, turbidity accumulates in the surface layer of the filtration layer, and therefore, regular cleaning such as air cleaning and backwashing is performed mainly on the surface layer.

  However, after a certain period of time, the turbidity will sink into the filtration layer, and the turbidity will adhere to the filtration layer itself, causing clogging and reducing the processing efficiency.・ It needs to be recycled and reused.

  Conventionally, as a solid-liquid separation and washing device for washing particulate matter such as filter media and solid-liquid separation, a spiral channel is formed from the inlet connected to the end of the transfer line toward the end of the spiral. And a solid-liquid separation and washing section in which the ceiling of the spiral flow path is shielded, a floor portion is formed at the bottom, and a separation hole is formed in the floor portion, and a spiral is formed extending vertically upward in communication with the end of the spiral flow path. An overflow section that overflows liquid at a position higher than the ceiling of the flow path; a storage tank that is provided below the solid-liquid separation and cleaning section as a lid, and communicates with the spiral flow path through the separation hole; It is provided in the discharge part that discharges the particulate matter that has settled inside, and at least a partial area of the spiral flow path, and disturbs the flow of the liquid and the particulate matter to turbulently flow the particulate matter and attach the surface of the particulate matter. A solid-liquid comprising a flow obstruction part that promotes peeling of the kimono Away cleaning apparatus has been proposed (see Patent Document 1.).

That is, when this solid-liquid separation and cleaning device is roughly outlined, the filter medium is washed by flowing sewage containing filter medium such as gravel and sand into a spirally formed pipe line, and the pipe line Through the separation hole formed in the bottom of the filter, only the filter medium is dropped to make a solid-liquid separation.
JP 2005-305304 A

  However, in the conventional solid-liquid separation and cleaning apparatus, the filter medium flowing in a large amount is likely to clog the separation hole, and not all the filter medium can be efficiently separated through the separation hole formed in the bottom of the pipe line. There is a problem that the working time is prolonged and the maintenance of the solid-liquid separation and washing apparatus needs to be frequently performed, which is extremely uneconomical.

  Moreover, in recent years when environmental issues are regarded as important, there are cases where the cleaning standard (cleaning accuracy) of the filter medium to be reused is strictly required. However, in the conventional solid-liquid separation and cleaning device, the flow of the liquid and the particulate matter is obstructed so that the flow is turbulent and the separation of the surface deposit on the particulate matter is promoted. When accuracy is required, there is a limit to the cleaning accuracy, and as a result, there has been a problem that reliable separation and cleaning operations cannot be performed.

  The present invention aims to solve such a problem, and it is simple and reliable in a short time while reliably washing gravel and sand filter materials laid in a filtration pond such as a water purification plant. Provided is a solid-liquid separation and cleaning system that separates and cleans and recycles filter media, and makes it recyclable.

To achieve the above object, the present invention is to separate the Filtration wood and water comprising a dust included in wastewater, a solid-liquid separation cleaning system for cleaning the filtering medium, including said filtering material A first solid-liquid separation and cleaning device to which the sewage is supplied, and a second solid-liquid separation and cleaning device for further cleaning the filter medium cleaned by the first solid-liquid separation and cleaning device. cleaning apparatus, the bottom of the cylindrical body is formed in a funnel shape, a hopper main body formed by a funnel-shaped lower end to the outlet, before Symbol hopper is fixed to the main body and the side walls of the open cylinder vertically, A swirl tube having an outlet for ejecting sewage containing the filtering material in the inner circumferential direction of the side wall, and collecting water in one direction by receiving water overflowing from the upper end of the hopper body at the outer periphery of the upper end of the hopper body. and trough receiving possible discharge of the hopper body Is connected to the mouth, and a feeding means for transporting the filter medium is discharged to the second solid-liquid separation cleaning apparatus through the exhaust port, the second solid-liquid separation cleaning apparatus, the outlet in the bottom of the cylindrical body And a swirl flow tank that is fixed to the upper portion of the cleaning tank and that contains the filtering material transported by the feeding means, and that separates water and the filtering material by centrifugation. And a sprinkling means for sprinkling water into the washing tank to wash the filter medium which is provided at the lower part of the washing tank and drops from the swirling flow tank and accumulates in the lower part of the washing tank. It is in.

  That is, in the first solid-liquid separation and cleaning device, a cylindrical swivel cylinder that is opened up and down is disposed in the hopper body, and sewage containing filtering material such as dust is swirled in the swirl cylinder. Thus, while washing the filter medium, the filter medium having a predetermined particle size or more can get on the flow of water swirling in the swirl cylinder by its own weight (hereinafter referred to as “swirling flow”). Instead, it is structured so as to be naturally dropped below the cylinder.

  As described above, according to the first solid-liquid separation and cleaning device, all filter media having a particle size larger than a predetermined size that cannot be swirled flow fall naturally due to their own weight while being cleaned, and easily and reliably with water. To be separated.

  Further, since the swivel cylinder is a cylinder opened up and down, the separated filter medium having a particle diameter of a predetermined size or more does not cause clogging of the swivel cylinder, and the work time can be shortened. In addition, since it is not necessary to frequently perform maintenance and management, it is extremely economical.

  Further, the second solid-liquid separation and cleaning device of the present invention cleans the filter medium cleaned in the first solid-liquid separation and cleaning device while separating it from water by the swirl flow tank, and drops it below the swirl flow tank. . The fallen filter medium is stored in the lower part of the washing tank, and the stored filter medium is further washed with water sprayed from the sprinkling means.

  Further, in the second solid-liquid separation and cleaning apparatus of the present invention, the filter medium falls while rotating from the swirling flow tank, so that the filter medium does not clog the swirl cylinder, and the working time is short. This is very economical because it is not necessary to frequently perform maintenance and management.

  Thus, the filter medium can be reliably washed through the first solid-liquid separation and washing device and the second solid-liquid separation and washing device, and can be regenerated and recycled.

  In the solid-liquid separation and cleaning system, the water sprayed from the water spraying means into the cleaning tank is overflowed from the cleaning tank, and the filter medium is back-washed until the overflowing water reaches a set turbidity.

  Thus, since the filter medium is back-washed until the water overflowing in the cleaning tank reaches the set turbidity, the filter medium can be improved in cleaning accuracy and can be a stable and good quality filter medium as a recycled product.

On the upstream side of the first solid-liquid separation and cleaning device, a mesh formed in a predetermined size is provided and a filter medium containing gravel, sand and dust is passed, so that gravel and sand having a size larger than a predetermined size are passed. A sieving means for classifying is provided, and the water collected at the receiving part and the water discharged from the swirl tank are supplied to a filtering means for filtering fine dust contained in the water. In addition, the filtered water after filtration is supplied to a predetermined device in the present system so that it can be reused.

  That is, the filter medium contained in the sewage pumped up from the filter pond or the like often contains coarse filter medium such as pebbles or gravel, specifically, gravel or sand having a size of 2 mm or more. It is included.

  Such coarse filter media can be separated and washed by the swivel cylinder of the first solid-liquid separation and washing apparatus of the present invention, but these coarse filter media use the first solid-liquid separation and washing apparatus. Even if not, it can be easily eliminated by existing sieving means.

  Moreover, if these coarse filter media are swirled together with fine filter media in the swivel cylinder of the present apparatus, there is a possibility that the flow of the swirling flow is not smoothly performed.

  For this reason, the solid-liquid separation and cleaning system of the present invention can remove only grammage, sand, etc. of a predetermined size from the sewage pumped up from the filtration pond, etc., by preliminarily classifying them with a sieving means. The sewage containing water can be smoothly swirled by the swivel cylinder, and a reliable separation and cleaning operation is performed.

  Furthermore, as described above, the filter medium that naturally falls without being swirled in the swirl flow is dropped and separated by its own weight, but the light weight of its own weight is very fine and difficult to identify with the naked eye. Dust) is drained together with water while riding on the swirling flow.

  Therefore, the solid-liquid separation and cleaning system of the present invention further filters fine dust floating along with the swirling flow with a filtering means, and supplies filtered water, which is clean water after filtration, to a predetermined device in the system. The water is circulated by a pump or the like and supplied for reuse.

  As described above, in the solid-liquid separation and washing system of the present invention, the swirling flow can be smoothly swirled to perform reliable separation and washing work, and the filter medium can be reused, and filtered water is also used in this system. By reusing as a large amount of water, a significant cost reduction can be achieved.

  Further, in the solid-liquid separation and cleaning system described above, there is a configuration in which bubbles are generated in a cleaning tank of the second solid-liquid separation and cleaning apparatus. In such a case, the cleaning effect at the time of reverse cleaning can be enhanced, and as a result, the cleaning ability can be improved and the cleaning operation time can be shortened.

  Since the present invention is configured to wash the filter medium with the first solid-liquid separation and washing apparatus and the second solid-liquid separation and washing apparatus, the filter medium is easily and reliably separated from the water to more reliably wash the filter medium. Can be recycled and recycled.

  In addition, the swirl cylinder of the first solid-liquid separation and washing apparatus and the swirl flow tank of the second solid-liquid separation and washing apparatus are cylindrical, and the filter medium is separated because it falls while rotating the swirl cylinder and the swirl flow tank. The filter medium having a particle size of a predetermined size or more does not cause clogging in the swirl cylinder and swirl flow tank, can be performed in a short time, and does not require frequent maintenance management. It is extremely economical.

  In addition, the present invention classifies only a predetermined size of gravel, sand, etc. from the sewage pumped up from the filter pond, etc., by classifying in advance by sieving means, thereby smoothly swirling the swirl flow to ensure reliable separation and cleaning work. It can be performed. Moreover, by further filtering the fine dust floating along with the swirling flow with the filtering means, the filtered water, which is clean water after the filtration, can be reused, and the cost can be greatly reduced.

  Hereinafter, a solid-liquid separation cleaning system according to the present invention will be described with reference to the drawings.

  FIG. 1 is an overall system diagram schematically illustrating an embodiment of a solid-liquid separation and cleaning system according to the present invention. Such a solid-liquid separation and cleaning system includes a primary sieve A, a secondary sieve B, a first solid-liquid separation and cleaning device C, a second solid-liquid separation and cleaning device D, a solid-liquid separation processing device E, and a tertiary sieve F. And.

  The primary sieving machine A includes a mesh (not shown) formed in a predetermined size, and is configured to be able to classify gravel, sand, etc. having a size larger than the predetermined size through the mesh. That is, the primary sieving machine A allows the filter medium P transported by a backhoe or human power from a filter pond such as a water purification plant to pass through a mesh formed in a size of 30 mm, thereby allowing the filter medium P of 30 mm or more. (Pebbles, gravel, etc.) can be classified and removed.

  Below the primary sieving machine A, a hopper 7 into which the filter medium P that has passed through the mesh of the primary sieving machine A is placed. A jet pump 9 is provided at the lower portion of the hopper 7 as a feeding means for feeding the filtering material P in the hopper that has passed through the mesh of the primary sieve to the secondary sieve B through the transport pipe 8. It has been.

  The secondary sieving machine B is disposed above the first solid-liquid separation and cleaning device C, and has a mesh formed to have a size of 2 mm, for example, and allows only sewage W containing a filter medium P of 2 mm or less to pass through. Filter media P (pebbles, gravel, etc.) of 2 mm to 30 mm can be classified and removed.

  As shown in FIGS. 6 and 7, the first solid-liquid separation and cleaning apparatus C includes a hopper body 1 in which a bottom portion 11 of a cylindrical body is formed in a funnel shape, and a lower end of the funnel shape is used as a discharge port 12. A jet pump 13 connected to the discharge port 12 of the hopper body 1 and capable of transporting sand or the like discharged through the discharge port 12 forward, and a connecting arm 21 in the hopper body 1 A swivel cylinder 2 formed by opening, on a fixed cylindrical side wall 22 opened vertically, a spout 23 for injecting sewage W containing filtering material P such as dust in the inner circumferential direction of the side wall 22 through a pump; The hopper main body 1 includes a ridge receiving portion 3 that receives water W1 overflowed from the upper end of the hopper main body 1 and collects water in one direction.

  In the present embodiment, a donut-shaped partition plate 14 that is inclined downward from the wall surface toward the center is provided above the bottom portion 11 of the hopper body 1. Even if the filter material P is affected and scattered, the filter medium P dropped on the upper surface of the partition plate 14 is guided to the center along the inclination of the partition plate 14 and smoothly falls toward the discharge port 12. .

  In addition, the partition plate 14 prevents the filter medium P, which has been dropped and precipitated, from rising upward due to the water flow in the hopper body 1.

  The swivel cylinder 2 is fixedly installed at substantially the center of the hopper body 1. Specifically, one end of the connecting arm 21 is fixed near the upper end of the inner surface of the side wall of the hopper body 1 and the other end of the connecting arm 21. Is fixed to the outer surface of the side wall of the swivel cylinder 2.

  Further, the swivel cylinder 2 may be a simple cylinder opened up and down, but if the lower end of the cylinder is formed in a funnel shape as shown in the figure, the filter medium P that naturally falls without getting on the swirl flow, It is preferable because the filter medium P can be easily collected by concentrating at the approximate center of the swivel cylinder 2.

  In the present embodiment, a conical jammer plate 4 that is pointed upward is disposed between the swivel cylinder 2 and the discharge port 12 of the hopper body 1. The material P can be smoothly dropped.

  Note that the position of the upper end surface of the swivel cylinder 2 is positioned lower than the position of the upper end surface of the hopper body 1. A spout 23 is formed in the side wall 22 of the swivel cylinder 2 installed in this manner, and the sewage W containing the filter medium P such as dust is ejected in the inner peripheral direction of the side wall 22 through an existing pump (not shown). is doing.

  The eaves receiving part 3 is formed in a groove shape capable of receiving the water W1 overflowing from the upper end of the hopper body 1 and is inclined in one direction. Therefore, the water W1 that has overflowed from the upper end of the hopper body 1 is collected in one direction through the gutter receiving portion 3. The water W1 collected in this way is discharged through a discharge pipe 25 connected to the eaves receiving part 3 shown in FIG.

  The second solid-liquid separation and cleaning device D is disposed on the downstream side of the first solid-liquid separation and cleaning device C. As shown in FIG. 2, the second solid-liquid separation and washing apparatus D is a reverse washing tank as a washing tank in which a bottom 31 of a cylindrical body is formed in a funnel shape and the lower end of the funnel shape is a discharge port 32. 30, a swirl flow tank 40 fixed to the upper part of the reverse cleaning tank 30 via a support 33, and watering means 50 provided in the lower part of the reverse cleaning tank 30.

  The swirl flow tank 40 is formed of a cylindrical body (sand separator) having a lower portion 40a tapered and tapered, and the lower end faces the upper portion of the backwash tank 30 and the center. The cylindrical peripheral wall 41 of the swirling flow tank 40 is provided with a slurry inlet 43 that communicates the inside and outside of the swirling flow tank 40. The slurry inlet 43 and the jet pump 13 are connected via a transport pipe 44.

  Therefore, the filter medium P at the bottom 11 of the hopper body 1 is collected at the discharge port 12 at the center of the bottom 11 of the hopper body 1, and the swirl flow tank 40 is passed through the discharge port 12 by the jet pump 13 via the transport pipe 44. To be sent to.

  The upper wall 40b of the swirling flow tank 40 is provided with a discharge port portion 45 that communicates the inside and outside of the swirling flow tank 40. A discharge pipe 46 is connected to the discharge port 45, and the water W 2 separated by centrifugal separation in the swirling flow tank 40 is discharged through the discharge pipe 46.

  On the inner periphery of the upper part of the reverse cleaning tank 30a, there is provided a bottle receiving part 35 that receives water overflowing from the reverse cleaning tank 30 and collects water in one direction. The bowl receiving portion 35 is provided in the reverse cleaning tank upper portion 30a and has a horizontal annular plate 36 having an open central portion, and an upper surface of the annular plate 36 has a distance L from the inner peripheral surface of the reverse cleaning tank upper portion 30a. The cylindrical portion 37 is fixed, and the annular guide portion 38 is extended from the upper end of the cylindrical portion 37 toward the center of the reverse cleaning tank.

  The inner peripheral diameter of the guide portion 38 is set to be equal to the inner peripheral diameter of the annular plate 36, and an opening 39 is formed at the center of the annular plate 36 and the guide portion 38. The lower end of the swirling tank 40 is inserted into the opening 30, and the water overflowing from the upper end of the backwash tank 30 flows through the guide portion 38 through the opening 39 and is collected in the cradle 35. The

  Further, the upper part 30a of the reverse cleaning tank is provided with a discharge port part 34 communicating with the bowl receiving part 35. The water collected in the gutter receiving portion 35 is discharged through a discharge pipe 49 connected to the discharge port portion 34.

  The water sprinkling means 50 is capable of washing the filter medium P dropped from the swirling flow tank 40 by sprinkling washing water into the back washing tank 30 and is installed in the back washing tank lower part 30b. . The watering means 50 includes a main watering pipe 51 arranged in the diameter direction of the backwash tank 30 and a plurality of branch watering pipes 52 connected in a direction perpendicular to the main watering pipe 51.

  The branch water spray pipes 52 are parallel to each other with a predetermined interval, and the lengths of the branch water spray pipes 52 are set such that the tips of the branch water spray pipes approach the inner peripheral surface of the reverse cleaning tank. Each branch water spray pipe 52 is formed with a plurality of nozzle ports (not shown) downward from the base to the tip. Thus, by forming the nozzle port downward, the cleaning water can be jetted downward, and the filter medium P accumulated in the lower portion of the reverse cleaning tank 30 can be stirred and floated.

  One end of the main sprinkling pipe 51 is provided with a sprinkling pipe inlet 54 that protrudes to the outside from the reverse cleaning tank 30, and this sprinkling pipe inlet 54 is connected to the pump P <b> 1 through a cleaning water supply pipe 55. . The pump P1 is controllable so that the amount of cleaning water supplied to the watering means 50 can be adjusted. Therefore, by supplying a large amount of cleaning water to the watering means 50, the filter medium P is floated and the reverse cleaning operation becomes possible.

  It is also possible to perform the cleaning operation while sprinkling a smaller amount of cleaning water from the sprinkling means 50 and allowing the water to overflow from the reverse cleaning tank 30 than in the reverse cleaning operation. This operation is not necessary until the reverse cleaning operation, but is performed when the filter medium P is appropriately cleaned. In addition, after performing the reverse cleaning operation, it is possible to perform a cleaning operation other than the reverse cleaning operation.

  A transport pipe 58 is connected to a discharge port 32 provided in the lower part of the backwash tank 30 via a jet pump 57 as a feeding means. Therefore, the filter medium P washed in the back washing tank 30 is supplied to the solid-liquid separation processing apparatus E through the transport pipe 58 by the jet pump 57.

  The solid-liquid separation processing apparatus E further divides the filter medium P washed by the second solid-liquid separation and washing apparatus D into fine sand and dehydrates it, and the soot of the first solid-liquid separation and washing apparatus C. And a filtering means 61 for filtering the water W1 collected by the receiving unit 3 and the water W2 discharged from the swirling flow tank 40 of the second solid-liquid separation and washing apparatus D. In addition, the water W1 collected by the trough receiving portion 3 is supplied to the filtering means 61 through the discharge pipe 25. Further, the water W2 discharged from the swirling flow tank 40 is supplied to the filtering means 61 through the discharge pipe 46.

  The solid-liquid separation / cleaning system according to the present embodiment has the above-described configuration, and next, the case where the filter medium P transported from a filtration pond such as a water purification plant is processed using the solid-liquid separation / washing system will be described. To do.

  First, the filter medium P carried out by a suitable means such as a backhoe or human power from a filter pond such as a water purification plant is put into the primary sieving machine A by a belt conveyor or the like. By passing a mesh formed in a size of 30 mm, the primary sieving machine A classifies and removes the filtering material P (pebbles, gravel, etc.) of 30 mm or more.

  The filter medium P that has passed through the primary sieving machine A is fed to the secondary sieving machine B installed above the first solid-liquid separation and cleaning device C through the transport pipe 8. By passing the mesh formed in the size of 2 mm of the secondary sieve B, the filter medium P (pebbles, gravel, etc.) of 2 mm to 30 mm is classified and removed by the secondary sieve B.

  Here, only the sewage W containing the filter medium P of 2 mm or less is the target of the first solid-liquid separation and cleaning device C. The sewage W containing the fine filter medium P of 2 mm or less is surely solid-liquid separated. This is because the conventional solid-liquid separator is difficult, but the size is not particularly limited.

  In the present embodiment, the filter medium P (pebbles, gravel, etc.) of 2 mm or more removed by the secondary sieve B is washed by a conventional solid-liquid separation and washing device (tertiary sieve F), and then given a predetermined amount. If the mesh formed in size is passed through, for example, sorted into 2 to 5 mm, 5 to 10 mm, 10 to 20 mm, and 20 to 30 mm, and these filter media P (pebbles, gravel, etc.) are washed, regenerated and recycled. good.

  And only the sewage W containing the filter medium P of 2 mm or less which is not removed by the secondary sieve B is supplied to the 1st solid-liquid separation washing | cleaning apparatus C. The first solid-liquid separation / cleaning apparatus C operates as follows.

  First, when the hopper body 1 is filled with water W1, the swivel cylinder 2 is submerged in water, and the pump (not shown) is driven, the filter medium P such as sand dust of 2 mm or less that is not removed by the secondary sieving machine B is used. The sewage water W containing water is ejected from the outlet 23 of the swirl tube 2 and swirls in the inner circumferential direction along the side wall 22 of the swirl tube 2 as shown by solid line arrows in FIG. Occurring and cleaning the filter medium P.

  The swirling flow has a high flow velocity in the vicinity of the jet outlet 23, but the flow velocity gradually decreases as the swirling cylinder 2 is swung. Therefore, the filter medium P contained in the sewage W does not get on the swirling flow. The natural weight gradually falls below the swivel cylinder 2 due to its own weight and is separated from the water W1.

  The fallen filter medium P is collected at the discharge port 12 at the center of the bottom 11 of the hopper body 1, and is sent to the downstream second solid-liquid separation and cleaning device D by the jet pump 13 through the discharge port 12.

  On the other hand, the water W1 from which the filter medium P has fallen and separated overflows from the upper surface of the swivel cylinder 2 and is filled into the hopper body 1, as indicated by the white arrow in FIG. When the water is full, it overflows from the upper end of the hopper body 1 and is received by the hook receiving portion 3.

  The dredge receiving portion 3 collects water in one direction, and the collected water W <b> 1 is supplied to the filtering means 61 through the discharge pipe 25. Through the filtering means 61, fine dust contained in the water W1 can be removed, and the dust can be reused as a filtering material.

  According to the first solid-liquid separation and cleaning apparatus C, all the filter media P that cannot get on the swirl flow are easily and reliably separated from the water W by their own weights while being cleaned. Can be recycled.

  Further, since the filter medium P is not clogged in the revolving cylinder 2 and the working time can be performed in a short time, it is not necessary to frequently perform maintenance management, which is extremely economical.

  Next, the operation of the second solid-liquid separation and cleaning apparatus D will be described.

  When the sewage W containing the filter medium P is fed from the first solid-liquid separation and cleaning apparatus C to the swirl flow tank 40 of the second solid / liquid separation and cleaning apparatus D, the filter medium P is included from the slurry inlet 43. Sewage W is ejected. The sewage W is swirled in the inner circumferential direction along the side wall of the swirl flow tank 40 as shown by solid arrows in FIG. Similarly to the above, the filter medium P contained in the sewage W is naturally dropped gradually below the swivel cylinder 2 by its own weight by the centrifugal separation action, and separated from the water W2.

  The filter medium P that sequentially falls from the swirl flow tank 40 is accumulated at the bottom of the backwash tank 30. After the filter medium P reaches a predetermined amount, the accumulated filter medium P is back-washed. Specifically, once the flow of the filter medium P from the first solid-liquid separation and cleaning device C is stopped and the cleaning water is supplied to the sprinkling means 50 by the pump P1, the nozzle port 53 of the branch sprinkling pipe 52 is used. Wash water spouts downward. The washing water gradually increases while stirring the filter medium P accumulated at the bottom of the reverse washing tank 30 and floating it upward.

  The washing water overflows from the opening 39 provided in the upper part of the reverse washing tank 30, flows on the upper surface of the guide part 38, and is collected in the cradle receiving part 35 (see FIG. 5). The water W <b> 3 collected in the bottle receiving part 35 is discharged through the discharge pipe 49 connected to the discharge port part 34.

  At the time of backwashing, the filter medium P floats upward, and even if it may reach the upper part of the backwash tank 30, the annular plate 36 functions as a baffle plate. Inadvertent overflow with W3 can be prevented.

  Thus, the reverse cleaning is continued for a predetermined time while sprinkling the cleaning water, and the reverse cleaning operation is stopped when the overflowing water W3 reaches a predetermined turbidity (for example, the cleaning drainage turbidity is less than 2 degrees). .

  Further, the filter medium P washed by the second solid-liquid separation and washing apparatus D is sent to the downstream solid-liquid separation processing apparatus E by the jet pump 57 through the discharge port 32 and the transport pipe 58. Then, the sand removed from the flowed filter medium P by the drum screen 60 is dehydrated and appropriately discharged.

  Further, when the reverse cleaning operation is not performed, the amount of the cleaning water sprayed is adjusted so that the cleaning water (water W3) overflows. In such a case, the cleaning operation can be performed continuously, and there is no need to temporarily stop the flow of the filtering material P from the first solid-liquid separation and cleaning device C. A series of processing operations from the machine A to the solid-liquid separation processing apparatus E can be continuously performed.

  In the reverse cleaning, air may be mixed with the cleaning water to generate bubbles together with the cleaning water. In such a case, fine algae or dust floating at the time of cleaning can be adsorbed to the bubbles and drained together with water efficiently, so that the cleaning capability can be improved and the cleaning operation time can be shortened.

  As shown in FIG. 1, air is provided with a bubble generator 62 in the lower part of the backwash tank 30 separately from the watering means 50, and air is pumped to the bubble generator 62 from an air supply means 63 such as a blower. By doing so, bubbles may be generated.

  The water W2 discharged from the swirling tank 40 is discharged through the discharge pipe 46 and supplied to the filtering means 61 of the solid-liquid separation processing apparatus E, and fine dust contained in the water W2 is removed through the filtering means 61. Thus, the dust can be reused as a filter medium.

  Further, since the water passing through the filtering means 61 is clean water from which fine dust has been removed (hereinafter referred to as “filtered water”), the filtered water is appropriately pumped up and subjected to primary sieving through a water pipe. It is fed to any one of the machine A, the secondary sieve B, the first solid-liquid separation and cleaning apparatus C, the second solid-liquid separation and cleaning apparatus D, the solid-liquid separation processing apparatus E, and the tertiary sieve F and reused. be able to.

  According to the solid-liquid separation / cleaning system of the present embodiment, only the predetermined size of gravel, sand, etc., out of the sewage pumped up from the filtration pond, etc. is preliminarily primary sieve A, secondary sieve B, tertiary. Since classification is performed by the sieving machine F, the swirl flow in the first solid-liquid separation and cleaning device C and the second solid-liquid separation and cleaning device D can be smoothly swirled, and a more reliable separation and washing operation can be performed.

  Moreover, by filtering the fine dust suspended along with the swirling flow with the filtering means 61, the filtered water, which is clean water after filtration, can be reused, and the cost can be greatly reduced.

  Moreover, the 1st solid-liquid separation washing | cleaning apparatus C forms the lower end of the swirl cylinder 2 in the shape of a funnel, and the filter medium P that has fallen naturally without getting on the swirl flow is collected at the approximate center of the swirl cylinder. Therefore, the filter medium P can be easily recovered.

  Moreover, since the 1st solid-liquid separation washing | cleaning apparatus C provides the cone-shaped jammer board 14 pointed upwards between the turning cylinder 2 and the discharge port of the hopper main body 1, it cannot ride on a turning flow. Since the filter material that falls naturally hits the jammer plate 14, the filter material P can be dropped smoothly, and the working time can be further shortened.

  In addition, although the solid-liquid separation washing system which concerns on this Embodiment is generally installed in the vicinity of filtration ponds, such as a water purification plant, it can also be installed and moved, for example in the loading platform of a vehicle.

1 is an overall system diagram schematically illustrating an embodiment of a solid-liquid separation and cleaning system according to the present invention. It is a longitudinal cross-sectional view of the 2nd solid-liquid separation washing | cleaning apparatus used for the solid-liquid separation washing | cleaning system. (A) is a top view of a 2nd solid-liquid separation washing | cleaning apparatus, (b) is a cross-sectional top view of a 2nd solid-liquid separation washing | cleaning apparatus. It is sectional drawing which shows the state which isolate | separates a filter medium and sewage with a 2nd solid-liquid separation washing | cleaning apparatus. It is sectional drawing which shows the state which backwashes with a 2nd solid-liquid separation washing | cleaning apparatus. It is a schematic perspective view of the one part broken state which shows one Example of the 1st solid-liquid separation washing | cleaning apparatus used for the solid-liquid separation washing | cleaning system which concerns on this invention. It is a longitudinal cross-sectional view of the 1st solid-liquid separation washing | cleaning apparatus shown in FIG.

Explanation of symbols

A Primary sieving machine (sieving means)
B Secondary sieve machine (sieving means)
C 1st solid-liquid separation washing | cleaning apparatus D 2nd solid-liquid separation washing | cleaning apparatus E Solid-liquid separation processing apparatus F Tertiary sieving machine (sieving means)
W Sewage W1 Water W2 Water W3 Water 1 Hopper body 11 Bottom 12 Discharge port 13 Jet pump (feeding means)
2 Swivel cylinder 22 Side wall 23 Spout 3 Receptor 4 Jammer plate 30 Reverse cleaning tank (cleaning tank)
31 Bottom 32 Discharge port 35 Receptor 40 Swivel tank 47 Jet pump (feeding means)
50 Watering means 51 Main watering pipe 52 Branch watering pipe 57 Jet pump (feeding means)
60 drum screen

Claims (4)

While separating the Filtration wood and water comprising a dust contained in the wastewater, a solid-liquid separation cleaning system for cleaning the filtering material,
A first solid-liquid separation and cleaning device to which sewage containing the filtering material is supplied; and a second solid-liquid separation and cleaning device that further cleans the filtering material cleaned by the first solid-liquid separation and cleaning device,
The first solid-liquid separation cleaning apparatus, the bottom of the cylindrical body is formed in a funnel shape, a hopper main body formed by a funnel-shaped lower end to the outlet, open to the top and bottom before SL is fixed to the hopper body and the cylinder inner wall, receiving the a filtering material to become a wastewater containing opened a spout for ejecting the side wall in the circumferential direction turning cylinder, the water overflowing from the hopper body upper end to the upper end outer periphery of the hopper body And a feeding part that is connected to a discharge port of the hopper body and transports the filter medium discharged through the discharge port to a second solid-liquid separation and cleaning device ,
In the second solid-liquid separation and cleaning apparatus, a cleaning tank having a discharge port at the bottom of a cylindrical body, and sewage containing the filter medium fixed to the top of the cleaning tank and transported by the feeding means are ejected. And a swirl flow tank that separates water and the filter medium by centrifugal separation, and the filter medium that is provided at a lower portion of the washing tank and falls from the swirl flow tank and accumulates at the lower portion of the wash tank is washed. Therefore, a solid-liquid separation and washing system comprising a watering means for spraying water into the washing tank.   2. The solid-liquid separation and cleaning system according to claim 1, wherein the water sprayed from the spraying means is overflowed from the cleaning tank into the cleaning tank, and the filter medium is back-washed until the overflowing water reaches a set turbidity. Solid-liquid separation cleaning system characterized by that. 3. The solid / liquid separation and cleaning system according to claim 1 or 2, wherein a filter medium containing gravel, sand and dust is provided on the upstream side of the first solid / liquid separation and cleaning device by providing a mesh formed in a predetermined size. A gravel having a size larger than a predetermined size by passing the water, a sieving means for classifying the sand , and the water collected in the cradle and the water discharged from the swirl tank are Water is supplied to a filtering means for filtering fine dust contained in water, and the filtered water after filtration is supplied to a predetermined device in the system so that it can be reused. Liquid separation cleaning system.   3. The solid-liquid separation and washing system according to claim 2, wherein bubbles are generated in a washing tank of the second solid-liquid separation and washing apparatus.

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