A multi-stage high-efficiency solid-liquid separation device

Abstract

The present invention relates to the technical field of sewage filtration treatment, and specifically to a multi-stage high-efficiency solid-liquid separation device, comprising a pipeline, filter plates arranged in sequence in the pipeline, and the filter hole diameter of each filter plate gradually decreasing along the water flow direction, a cleaning brush arranged on the plate surface of each filter plate for relative sliding, and an emptying branch pipe for discharging scraped debris arranged on each filter plate in the pipeline that can be opened and closed; the present invention can effectively remove debris attached to the filter plate, keep the filter holes unobstructed, and thus smoothly carry out the sewage filtration work.

Description

Technical Field

[0001] The invention relates to the technical field of sewage filtration treatment, in particular to a multi-stage high-efficiency solid-liquid separation device. Background Art

[0002] Sewage is generally collected at sewage treatment plants through sewers and then centrally treated. Sewage is often mixed with large and small debris. Before the sewage reaches the sewage treatment plant, these debris are usually filtered out by a filter installed in the upstream sewer pipe. However, if only a single filter is used for filtration, if the mesh size is large, it will not have a good filtering effect; if the mesh size is small, it will be easily clogged by large and small debris. In order to solve the above technical problems, patent CN109331515A discloses a sewage pipe filtration device, which arranges multiple filter plates in sequence in the pipe, and the aperture of each filter plate decreases in sequence along the direction of water flow, thereby achieving graded filtration of debris, effectively preventing large and small debris from gathering on the same filter net.

[0003] Despite the use of graded filtration in the above-mentioned prior art, as debris continues to accumulate, the filter holes on the filter plate will still be blocked one by one; when all the filter holes are blocked, the debris will fill the pipes, thereby blocking the sewer pipes, and thus seriously affecting the filtration and discharge of sewage; at this time, it is necessary to hire specialized personnel to clean it, which is time-consuming and labor-intensive. Summary of the Invention

[0004] In order to avoid and overcome the technical problems existing in the prior art, the present invention provides a multi-stage high-efficiency solid-liquid separation device. The present invention can effectively remove debris attached to the filter plate, keep the filter holes unobstructed, and thus smoothly filter the sewage.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A multi-stage high-efficiency solid-liquid separation device includes a pipeline and filter plates arranged in sequence in the pipeline along the length of the pipeline, and the aperture of the filter holes of each filter plate gradually decreases along the water flow direction. A cleaning brush is slidably arranged on the flow-facing surface of each filter plate, and the pipeline is provided with an emptying branch pipe located at each filter plate, which can be opened and closed and is used to discharge debris brushed off the filter plate.

[0007] As a further solution of the present invention: each filter plate is slidably inserted into the pipeline from top to bottom along the direction perpendicular to the pipeline axis; the cleaning brush is fixed on the inner wall of the pipeline, and the bristles of the cleaning brush are arranged on the upstream surface of the filter plate.

[0008] As a further solution of the present invention: each emptying branch pipe is connected to the pipe wall of the pipeline, and the inlet of each emptying branch pipe is located at the end of the sliding path of the corresponding filter plate; the bottom of the filter plate abuts the inlet of the emptying branch pipe and forms a sealed stop fit with the inlet.

[0009] As a further solution of the present invention: the filter plate is provided with a discharge portion for limiting the distance the filter plate slides upward, the discharge portion includes a baffle plate arranged at the bottom of the filter plate, the baffle plate extends vertically downward into the lumen of the emptying branch pipe, and the depth of the baffle plate inserted into the emptying branch pipe is greater than the length of the sliding path of the filter plate.

[0010] As a further solution of the present invention: the baffle plate is arranged on the side close to the water outlet surface of the filter plate, and the back of the baffle plate is a second wedge-shaped surface arranged downwardly inclined; and a lower limit block is arranged on the back of the baffle plate, and an upper limit block is arranged at the inlet of the emptying branch pipe, and the upper limit block is located on the vertical movement path of the lower limit block.

[0011] As a further solution of the present invention: the pipeline is provided with a guide hole with the hole axis arranged vertically, and each filter plate is inserted into the corresponding guide hole; a sealing part is arranged at the entrance of each guide hole; the sealing part includes sealing plates symmetrically arranged on both sides of the filter plate and capable of covering the matching gap between the filter plate and the guide hole, each sealing plate is elastically hinged at the entrance of the guide hole, and the cantilever end of the sealing plate rests on the plate surface of the filter plate in the sliding process.

[0012] As a further solution of the present invention: a mounting hole is recessed on the lower surface of the sealing plate, a tension spring is coaxially fixedly arranged in the mounting hole, and a tension rope is connected between the telescopic end of the tension spring and the corresponding side wall of the filter plate.

[0013] As a further solution of the present invention: the filter plate includes a first filter plate and a second filter plate, the second filter plate includes an upper filter plate and a lower filter plate; the upper filter plate and the lower filter plate are arranged in sequence from top to bottom, and the upper filter plate and the lower filter plate are connected to each other by a baffle.

[0014] As a further solution of the present invention: the top surface of the cleaning brush is a first wedge-shaped surface arranged to be inclined downward, and the inclination angle of the first wedge-shaped surface gradually increases toward the corresponding side plate surface of the filter plate.

[0015] As a further solution of the present invention: each emptying branch pipe is connected to the collection box, and a material baffle is horizontally pulled out at the box mouth of the collection box, and a pull rod is arranged at the pulling end of the material baffle; the device also includes a vacuum pump, the suction pipe of the vacuum pump is connected to the emptying branch pipe, the inlet of the suction pipe is located on the moving path of debris in the emptying branch pipe, and a filter is arranged at the inlet; each emptying branch pipe is connected to a hot air blower.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Installing multiple layers of filter plates with gradually decreasing apertures inside the pipe allows for graded separation of the sewage mixture, thereby improving grading efficiency. Cleaning brushes installed on the filter plate surfaces can remove debris adhering to the filter plates, preventing clogging of the filter holes and improving filtration efficiency. The installation of drain branches effectively removes debris from the pipe, preventing it from re-clogging the filter holes or clogging the pipe due to excessive accumulation.

[0018] 2. The up and down movement of the filter plate not only removes debris attached to the plate surface, but also opens the entrance of the drain branch pipe so that debris can fall into the drain branch pipe. In addition, the up and down movement of the filter plate can also press the debris into the drain branch pipe from top to bottom, preventing the debris from being unable to fall, thereby improving the efficiency of debris removal.

[0019] 3. The entrance of the drain branch is set on the inner bottom surface of the pipe and is sealed by a filter plate. It mainly utilizes the gravity of the filter plate and debris. Under the action of gravity, the entrance is sealed. The more debris there is, the heavier the gravity is, and the better the sealing effect is.

[0020] 4. The baffle and upper filter plate facilitate the passage of debris-free water through the upper filter plate, ensuring rapid flow, preventing water from being blocked and stagnant, and improving filtration efficiency. Water flows toward the baffle, where it diffuses in all directions. As the fluid diffuses toward the lower filter plate, it generates a force along the surface of the lower filter plate, pushing debris to the bottom of the lower filter plate. This slows the rate at which the effective filter area of ​​the lower filter plate decreases, maintaining high filtration efficiency for a longer period and extending the time interval between impurity removal cycles.

[0021] 5. An inclined plate tilted in the direction of debris rolling down is set inside the emptying branch pipe, which can allow debris or water to flow down smoothly and avoid accumulation and blockage; at the same time, when debris falls on the inclined plate, the elastic force of the inclined plate can slow down the falling speed of the debris, avoiding large debris from causing impact damage to the emptying branch pipe.

[0022] 6. By setting the upper limit block and the second wedge surface, on the one hand, the lifting height of the filter plate can be controlled to make it easier to clean; at the same time, under the action of the second wedge surface, debris can be discharged, saving time and cost.

[0023] 7. By installing a hot air blower, the debris in the exhaust branch pipe can be dried and excess moisture can be removed, which is convenient for subsequent processing. The outlet of the air supply pipe is located below the inclined plate to prevent debris from clogging the air supply port.

[0024] 8. By setting a handle that can lift the first filter plate and the second filter plate at the same time, you only need to pull the handle to lift the first filter plate and the second filter plate at the same time. The operation is simple, fast and convenient, and the positioning greatly saves manpower and time costs.

[0025] 9. The setting of the baffle plate can prevent the pipes from being directly connected. That is, during the repeated cleaning of the filter plates, the debris brushed off by the filter plates will not only roll down the pipe to the next layer of filter plates, but will enter the emptying branch pipe under the limiting effect of the baffle plate. The depth of the baffle plate inserted into the emptying branch pipe is greater than the height of the filter plate, thereby preventing the baffle plate from being pulled out of the emptying branch pipe, so that all the debris brushed off by the filter plates will enter the emptying branch pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is a structural schematic diagram of the first filter plate in the present invention.

[0028] Figure 3 It is a structural schematic diagram of the second filter plate in the present invention.

[0029] Figure 4 It is a structural schematic diagram of the collection box in the present invention.

[0030] Figure 5 Schematic diagram of the structure of the sealing part of the present invention.

[0031] Figure 6 It is a structural schematic diagram of the blanking part in the present invention.

[0032] Figure 7 It is a structural schematic diagram of the hot air blower in the present invention.

[0033] In the picture:

[0034] 10. Pipe; 11. Filter plate; 111. First filter plate; 112. Second filter plate; 112a. Upper filter plate; 112b. Lower filter plate; 112c. Baffle; 12. Cleaning brush; 121. First wedge-shaped surface; 13. Exhaust branch pipe; 131. Inclined plate; 14. Guide hole; 15. Guide plate; 16. Dosing pipe; 20. Discharge part; 21. Baffle plate; 211. Lower limit block; 22. Upper limit block; 23. Second wedge-shaped surface; 30. Sealing part; 31. Sealing plate; 32. Mounting hole; 33. Tension spring; 34. Pull rope; 40. Hot air blower; 41. Fan; 42. Heating wire; 43. Air gathering chamber; 44. Air supply pipe; 50. Vacuum pump; 51. Cleaning box; 60. Collection box; 61. Baffle plate; 62. Pull rod; 70. Cyclone tower. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] See also Figures 1 to 7 The device of the present invention includes a pipe 10, within which filter plates 11 are sequentially arranged along the direction of fluid flow, with the filter apertures of each filter plate 11 gradually decreasing in the direction of water flow. A cleaning brush 12 is arranged on the surface of each filter plate 11 so as to slide relative to each other. Furthermore, an openable and closable drain branch 13 for discharging scraped debris is arranged at each filter plate 11 of the pipe 10. An inclined plate 131 is provided within the drain branch 13, tilted in the direction of debris falling. This allows debris or water to flow smoothly and prevents accumulation and blockage. At the same time, when debris falls onto the inclined plate 131, the elastic force of the inclined plate 131 slows down the debris's descent, preventing larger debris from causing impact damage to the drain branch 13.

[0037] like Figure 1 、 Figure 2 and Figure 3 As shown, the filter plates 11 include a first filter plate 111 and a second filter plate 112. Both the first filter plate 111 and the second filter plate 112 are rectangular plate structures, and their shapes are similar to those of the pipe 10. When in use, the filter plates 11 are typically placed inside a horizontal pipe 10; the present invention is primarily applicable to the interior of a rectangular pipe 10. A guide hole 14 extending axially in a vertical direction is defined at the top of the pipe 10. The first and second filter plates 111, 112 are inserted into the guide holes from top to bottom, with their bottoms abutting the bottom of the pipe 10. Drain branches 13 are located at the bottoms of the first and second filter plates 111, 112 to facilitate the discharge of debris.

[0038] Each drain branch 13 is connected to the bottom wall of the pipe 10, and the inlet of each drain branch 13 is located at the bottom of the corresponding filter plate. The filter plate abuts the inlet of the drain branch 13, forming a sealed stop with the inlet. Cleaning brushes 12 are arranged on both sides of each filter plate and are fixed inside the pipe 10.

[0039] Second filter plate 112 includes an upper filter plate 112a and a lower filter plate 112b, which are arranged sequentially from top to bottom and connected to each other via baffle 112c. The upper filter plate 112a, lower filter plate 112b, and baffle 112c cooperate to form second filter plate 112, which has the same shape as first filter plate 111. The diameters of first filter plate 111, lower filter plate 112b, and upper filter plate 112a decrease in order.

[0040] like Figure 1 、 Figure 2 、 Figure 3 and Figure 5 As shown, to improve the sealing performance of the first filter plate 111 and the second filter plate 112 during operation, a sealing portion 30 is arranged at the entrance of each guide hole 14. The sealing portion 30 includes sealing plates 31 symmetrically arranged on both sides of the filter plate 11. When the filter plate 11 is in operation, the top of the filter plate 11 and the top of the positioning hole are in the same horizontal plane. At this time, the lower plate surface of the sealing plate 31 is also located in this horizontal plane, covering the gap between the filter plate 11 and the guide hole 14, thereby improving the sealing performance of this gap.

[0041] like Figure 5 As shown, each sealing plate 31 is hinged at the entrance of the guide hole 14, and the cantilevered end of the sealing plate 31 rests against the surface of the sliding filter plate 11. A mounting hole 32 is recessed on the lower surface of the sealing plate 31, and a tension spring 33 is coaxially fixedly arranged within the mounting hole 32. The fixed end of the tension spring 33 is welded to the bottom of the mounting hole 32, and a tension rope 34 is connected between the telescopic end of the tension spring 33 and the corresponding side wall of the filter plate 11.

[0042] like Figure 2 、 Figure 3 and Figure 6 As shown, a feeder 20 is positioned at the bottom of the filter plate 11 to limit the upward sliding distance of the filter plate 11. The feeder 20 comprises a retaining plate 21 disposed at the bottom of the filter plate 11, extending into the lumen of the drain branch 13. The retaining plate 21 is inserted into the drain branch 13 to a depth greater than the sliding path of the filter plate 11. A lower stopper 211 is positioned on the back of the retaining plate 21, and an upper stopper 22 is positioned at the entrance of the drain branch 13, located in the vertical movement path of the lower stopper 211.

[0043] When the first filter plate 111 needs to be cleaned, the handle mounted on the top of the first filter plate 111 is used to lift the first filter plate 111 upward. The sealing plate 31, driven by the first filter plate 111, then tilts upward and slides relative to the surface of the first filter plate 111. As the first filter plate 111 is lifted, the tension on the tension cord 34 is lost, causing the tension spring 33 to contract, thereby easily lifting the sealing plate 31 and allowing the first filter plate 111 to slide between the two sealing plates 31. After the debris on the surface of the first filter plate 111 has been cleaned, the handle is used to lower the first filter plate 111. The tension cord 34 is tightened, and the tension spring 33 extends. The tension cord 34 and the tension spring 33 now form an elastic cord, which pulls the sealing plate 31 to cover the gap between the first filter plate 111 and the guide hole 14, thereby achieving a seal.

[0044] When cleaning the first filter plate 111, the cleaning brushes 12 located on the left and right sides of the first filter plate 111 clean the debris adhering to the filter holes to ensure that the filter holes are unobstructed. A right-angled triangle-shaped platform is arranged on the outside of the cleaning brush 12, and the inclined surface of the platform constitutes a first wedge-shaped surface 121. The functions of the first wedge-shaped surface 121 are: first, it can protect the stable arrangement of the cleaning brush 12, avoid the impact of water flow, and extend its service life; second, it can prevent debris from accumulating on the surface and affecting its separation efficiency. A certain gap is left between the main body of the cleaning brush 12 and the corresponding plate surface of the first filter plate 111, and it is not made into a closed type. This can provide a displacement gap for debris attached to the surface of the first filter plate 111, prevent debris from getting stuck between the first filter plate 111 and the main body of the cleaning brush 12, and thus maintain the smoothness of the lifting.

[0045] When the first filter plate 111 is lifted, the retaining plate 21 at the bottom of the first filter plate 111 moves upward and engages with the upper stopper 22 provided on the wall of the drain branch 13. When engaged, the first filter plate 111 is raised to a height sufficient to fully clean the surface of the first filter plate 111. On the left side of the retaining plate 21 is a second wedge-shaped surface 23, which reduces the impact of debris being cleaned on the retaining plate 21.

[0046] The first filter plate 111 and the second filter plate 112 are cleaned in the same manner.

[0047] like Figure 1 and Figure 4 As shown, each drain branch 13 is connected to a collection box 60, and a horizontally extendable baffle plate 61 is arranged at the opening of the collection box 60. A pull rod 62 is arranged at the extended end of the baffle plate 61. Debris collected by each drain branch 13 is gathered at the opening of the collection box 60. When the debris needs to be cleaned, the pull rod 62 is pulled, and the baffle plate 61 at the box opening is pulled open, opening the box and allowing the debris to fall into the collection box 60 for centralized recovery.

[0048] like Figure 7 As shown, each exhaust branch pipe 13 is connected to a hot air blower 40. The hot air blower 40 includes a fan 41 and a heating wire 42; the heating wire 42 is arranged at the front end of the fan 41, and a hemispherical air collecting chamber 43 is arranged at the bottom of the heating wire 42. The bottom of the air collecting chamber 43 is connected to each exhaust branch pipe 13 through an air supply pipe 44. The debris in the exhaust branch pipe 13 will carry a small amount of moisture. Timely drying can reduce the degree of decay of the debris and thus the impact on the environment. The hemispherical air collecting chamber 43 can ensure that the hot air is evenly delivered to the air supply pipe 44, ensure that each exhaust branch pipe 13 is heated evenly, and then ensure that the debris is dry in the collection box 60, which is convenient for subsequent use or transportation.

[0049] The device also includes a vacuum pump 50, whose suction pipe is connected to the drain branch 13. The inlet of the suction pipe is located along the path of debris in the drain branch 13 and is equipped with a filter. When debris passes through the filter, the vacuum pump 50 is in operation. Under the suction force of the negative pressure, some of the moisture on the debris is absorbed and collected in the cleaning box 51. The vacuum pump 50 adjusts its suction force based on the actual absorption situation to prevent debris from being absorbed by the filter for a long time, which could block the drain branch 13 and affect the removal of surface moisture from other debris.

[0050] A diversion tube is located at the opening of the collection box 60, communicating with the cleaning box 51. When debris accumulates at the opening of the collection box 60, water on the surface of the debris flows through the diversion tube into the cleaning box 51. Simultaneously, the accumulated debris further presses out water adsorbed within the debris, which also flows through the diversion tube into the cleaning box 51.

[0051] During use, the sewage mixture is first poured into the device. The appropriate disinfectant or other agent is then added to the pipe 10 through the dosing tube 16 at the inlet of the pipe 10 to provide preliminary treatment for the sewage mixture. The flow rate of the mixture is slowed by the spindle-shaped guide plate 15, which simultaneously divides the mixture into two, impacting the first filter plate 111 as evenly as possible, fully utilizing the filtration area of ​​the first filter plate 111. Larger or medium-sized debris accumulates at the bottom of the first filter plate 111, while the remaining mixture flows to the second filter plate 112. The lighter mixture is filtered first by the upper filter plate 112a at the top, while the heavier mixture is filtered by the lower filter plate 112b, further reducing the pressure on the second filter plate 112. A baffle 112c connects the two filter plates to act as a water barrier. Most of the mixture that passes through the upper and lower filter plates 112a, 112b, is reduced to only fine debris, which continues to flow through the pipe 10. The tail end of the pipe 10 is connected to the cyclone tower 70, and the remaining sewage mixture is introduced into the cyclone tower 70 for centrifugation, thereby separating the solids and liquids in the sewage mixture and connecting to the cleaning box 51. The liquid outlet of the cyclone tower 70 is connected to the cleaning box 51, and the solid outlet of the cyclone tower 70 is connected to the box port of the collection box 60. A third filter plate is also arranged at the inlet of the cleaning box 51, so as to achieve another filtration of the remaining liquid and remove the solid impurities in the mixture as much as possible. A valve is provided at the liquid outlet at the bottom of the cyclone tower 70, which can be used to check whether further cleaning is needed according to actual conditions. When the valve is opened, water will enter the cleaning box 51, where activated carbon is placed to absorb finer impurities, making the discharged water purer and avoiding environmental pollution.

[0052] The debris rolling down the inside of the drain branch 13 can accelerate the rate of solid-liquid separation under the negative pressure adsorption of the vacuum pump 50, thereby separating the debris and water. A portion of the extracted water flows directly into the cleaning box 51 from the drain pipe; the water that has not yet been separated is carried to the box mouth of the collection box 60, so that under the action of gravity, the water gathers and is collected into the cleaning box 51. In the process of the debris rolling down, turn on the fan and heating wire 42 for drying to ensure that the discharged debris is not mixed with water. The debris brushed off from the first filter plate 111 and the second filter plate 112, plus the debris discharged from the cyclone tower 70, all fall on the baffle plate 61 on the box mouth of the collection box 60. If discharge is required, pull the pull rod 62 and all the accumulated debris will enter the collection box 60.

[0053] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A multi-stage high-efficiency solid-liquid separation device, comprising a pipeline (10) and filter plates (11) sequentially arranged in the pipeline (10) along the length direction of the pipeline (10), wherein the filter hole diameter of each filter plate (11) gradually decreases along the water flow direction, characterized in that: A cleaning brush (12) is slidably arranged on the flow-facing surface of each filter plate (11), and an emptying branch pipe (13) for discharging debris brushed off the filter plate (11) is arranged at each filter plate (11) and can be opened and closed; each filter plate (11) is slidably inserted into the pipe (10) from top to bottom along the direction perpendicular to the axis of the pipe (10); the cleaning brush (12) is fixed on the inner wall of the pipe (10), and the bristles of the cleaning brush (12) are arranged in contact with the flow-facing surface of the filter plate (11); each emptying branch pipe (13) is connected to the pipe wall of the pipe (10), and the inlet of each emptying branch pipe (13) is located at the end of the sliding path of the corresponding filter plate (11); the bottom of the filter plate (11) abuts against the inlet of the emptying branch pipe (13) and forms a seal with the inlet The filter plate (11) is provided with a feed portion (20), the feed portion (20) comprising a baffle plate (21) arranged at the bottom of the filter plate (11), the baffle plate (21) vertically extending downward into the cavity of the drain branch (13), the depth of the baffle plate (21) inserted into the drain branch (13) being greater than the length of the sliding path of the filter plate (11); the baffle plate (21) is arranged on a side close to the water outlet surface of the filter plate (11), and the back of the baffle plate (21) is a second wedge-shaped surface (23) arranged downwardly inclined; and a lower limit block (211) is arranged on the back of the baffle plate (21), and an upper limit block (22) is arranged at the inlet of the drain branch (13), and the upper limit block (22) is located on the vertical movement path of the lower limit block (211).

2. A multi-stage high-efficiency solid-liquid separation device according to claim 1, characterized in that: The pipe (10) is provided with a guide hole (14) with a hole axis arranged vertically, and each filter plate (11) is inserted into the corresponding guide hole (14); a sealing portion (30) is arranged at the entrance of each guide hole (14); the sealing portion (30) includes sealing plates (31) symmetrically arranged on both sides of the filter plate (11) and capable of covering the matching gap between the filter plate (11) and the guide hole (14); each sealing plate (31) is elastically hinged at the entrance of the guide hole (14), and the cantilever end of the sealing plate (31) abuts against the plate surface of the filter plate (11) in the sliding process.

3. A multi-stage high-efficiency solid-liquid separation device according to claim 2, characterized in that: A mounting hole (32) is concavely provided on the lower plate surface of the sealing plate (31), a tension spring (33) is coaxially fixedly arranged in the mounting hole (32), and a tension rope (34) is connected between the telescopic end of the tension spring (33) and the corresponding side wall of the filter plate (11).

4. A multi-stage high-efficiency solid-liquid separation device according to claim 3, characterized in that: The filter plate (11) comprises a first filter plate (111) and a second filter plate (112); the second filter plate (112) comprises an upper filter plate (112a) and a lower filter plate (112b); the upper filter plate (112a) and the lower filter plate (112b) are arranged in sequence from top to bottom, and the upper filter plate (112a) and the lower filter plate (112b) are connected to each other via a baffle (112c).

5. A multi-stage high-efficiency solid-liquid separation device according to claim 4, characterized in that: The top surface of the cleaning brush (12) is a first wedge-shaped surface (121) arranged to be tilted downward, and the tilt angle of the first wedge-shaped surface (121) gradually increases toward the corresponding side plate surface of the filter plate (11).

6. A multi-stage high-efficiency solid-liquid separation device according to claim 5, characterized in that: Each emptying branch pipe (13) is connected to the collection box (60), and a baffle plate (61) is horizontally drawn out at the box opening of the collection box (60), and a pull rod (62) is arranged at the drawing end of the baffle plate (61); the device also includes a vacuum pump (50), the suction pipe of the vacuum pump (50) is connected to the emptying branch pipe (13), the inlet of the suction pipe is located on the moving path of the debris in the emptying branch pipe (13), and a filter is arranged at the inlet; each emptying branch pipe (13) is connected to a hot air blower (40).

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