Split concentrating plate-and-frame filter press and lake and reservoir sediment dehydration process

Abstract

The invention relates to the field of filter pressing equipment, in particular to a split concentration plate-and-frame filter press and a lake and reservoir bottom mud dehydration process, the split concentration plate-and-frame filter press comprises a rack, a plurality of filter pressing plates and pulling plate trolleys, the filter pressing plates are arranged in the rack, the pulling plate trolleys are provided with two pulling plate trolleys which are in sliding connection with the rack, and the pulling plate trolleys are arranged on the rack. The plate pulling trolley is used for driving the filter pressing plate to slide on the rack, a knocking discharging device is arranged on the plate pulling trolley and comprises a supporting frame, a knocking rod and a limiting rod, the supporting frame is arranged at the top end of the filter pressing plate and fixedly connected with the plate pulling trolley, the limiting rod is arranged at the top end of the filter pressing plate, and a limiting hole is formed in the limiting rod; one end of the knocking rod penetrates through the limiting hole to abut against the top end of the filter pressing plate, a driving device is arranged at the end, away from the filter pressing plate, of the knocking rod and used for driving the knocking rod to slide in the limiting hole to knock the top end of the filter pressing plate, and the effect of improving the mud cake discharging efficiency of the filter press is achieved.

Description

Technical Field

[0001] The present application relates to the field of filter press equipment, and in particular to a split thickening plate and frame filter press and a lake reservoir sludge dewatering process. Background Art

[0002] As an important part of the natural water system, lakes and reservoirs play important roles in regulating water levels, discharging floods, providing water sources, and maintaining ecological balance. However, with the long-term use of lakes and reservoirs, sediment has accumulated in the lakes and reservoirs, resulting in a decrease in the water storage capacity of the lakes and reservoirs and a decrease in water quality. In order to improve the water quality of lakes and reservoirs and restore the ecological environment, it is necessary to carry out dredging and remediation of lakes and reservoirs.

[0003] At present, filter presses are often used in the process of sludge treatment during the dredging and remediation of lakes and reservoirs. Plate and frame filter presses are intermittent filtration equipment for separating solid and liquid in suspensions.

[0004] The existing filter press is an advanced separation mechanical equipment integrating mechanical, electrical and hydraulic functions. It includes a frame, filter press plates and a plate pulling trolley. The frame carries a number of filter press plates. The plate pulling trolley is set on the frame. The plate pulling trolley is used to drive the filter press plates to slide along the frame. When in use, the filter press plates are used to separate the suspended liquid into solids and liquids, so that the filtered solids are left between the two filter press plates, and then the solids condense into mud cakes. When the filtration is completed, the plate pulling trolley moves to the filter press plates, drives the filter press plates to slide in the frame, separates the two adjacent filter press plates, and makes the mud cake between the two filter press plates fall under the action of gravity, realizing the unloading of the filter press.

[0005] The above-mentioned prior art solutions have the following defects: in actual use, since pressure is applied to the mud cake during the filtration process, the mud cake is tightly bonded to part of the filter press plate, so it is necessary to use tools to manually assist in unloading the material next to the filter press, resulting in low efficiency in unloading the mud cake from the filter press. Summary of the invention

[0006] In order to improve the mud cake discharge efficiency of the filter press, the present application provides a split thickening plate and frame filter press and a lake reservoir bottom mud dewatering process.

[0007] The above technical objectives of this application are achieved through the following technical solutions: On the one hand, the present application provides a split concentrating plate-and-frame filter press, comprising a frame, a filter press plate and a plate pulling trolley, wherein a plurality of filter press plates are arranged in the frame, two plate pulling trolleys are arranged, and the two plate pulling trolleys are slidably connected to the frame, and the two plate pulling trolleys work together to drive the filter press plate to slide on the frame, and a knocking and unloading device is arranged on the plate pulling trolley, and the knocking and unloading device is used to knock the filter press plate, and the knocking and unloading device comprises a supporting frame, a knocking rod and a limiting rod, and the supporting frame is arranged on the filter press The top of the plate, both ends of the support frame are fixedly connected with two plate pulling trolleys respectively, the two plate pulling trolleys drive the support frame to slide along the frame, the limit rod and the knocking rod are both arranged between the support frame and the filter press plate, the limit rod is parallel to the top of the filter press plate, the knocking rod is perpendicular to the limit rod, and a limit hole is provided on the limit rod, one end of the knocking rod passes through the limit hole and abuts against the top of the filter press plate, and a driving device is arranged on the end of the knocking rod away from the filter press plate, and the driving device is used to drive the knocking rod to slide in the limit hole and knock the top of the filter press plate.

[0008] Furthermore, the driving device includes a pneumatic output device, a rotating rod and a linkage rod. The pneumatic output device is fixedly connected to the support frame, one end of the rotating rod is connected to the pneumatic output device, the pneumatic output device drives the rotating rod to rotate, the other end of the rotating rod is rotationally connected to the linkage rod, and one end of the linkage rod away from the rotating rod is rotationally connected to the knocking rod.

[0009] Furthermore, the pneumatic output device includes a shell, an air inlet pipe, an air outlet pipe, a turbine and an output shaft. The shell is fixedly connected to the support frame, the air inlet pipe and the air outlet pipe are both fixedly connected to the shell, the turbine is rotatably arranged in the shell, one end of the output shaft passes through the shell and is fixedly connected to the turbine, the output shaft is rotatably connected to the shell, one end of the output shaft away from the turbine is fixedly connected to a rotating rod, blades are arranged on the turbine, the air inlet pipe is used to input high-pressure gas to blow the blades to drive the turbine to rotate, and the air outlet pipe is used to discharge the gas in the shell that rotates with the blades of the turbine.

[0010] Furthermore, the air outlet pipe is connected to an injection device, which includes an injection pipe, which is fixedly connected to the limit rod, one end of the injection pipe is fixedly connected to the air outlet pipe, and an injection hole is opened on the injection pipe, and the injection hole is arranged toward the filter press plate. The injection hole is used to spray high-speed airflow to flush the side wall of the filter press plate.

[0011] Furthermore, each of the air jet holes is provided with a high-pressure nozzle, which is threadedly connected to the air jet hole.

[0012] Furthermore, there are multiple knocking rods, each of which is correspondingly provided with a driving device, each of which corresponds to a pneumatic output device, the air inlet pipes of all the pneumatic output devices are connected to the air supply device, the air supply device includes an air supply pipe and an air supply branch pipe, the air supply pipe is arranged at the top of the support frame, the air supply pipe is connected to the air source, each air inlet pipe corresponds to an air supply branch pipe, the two ends of the air supply branch pipe are respectively fixedly connected to the air supply pipe and the air inlet pipe, and the air supply branch pipe is used to connect the air supply pipe and the air inlet pipe.

[0013] Furthermore, a gas hose is provided between the gas pipe and the gas source, and the gas hose is used to cooperate with the movement of the plate pulling trolley on the frame.

[0014] Furthermore, a flexible sleeve is provided on the knocking rod, and the flexible sleeve is fixed to an end of the knocking rod away from the driving device.

[0015] On the other hand, the present application also provides a lake reservoir bottom mud dewatering process, using a split thickening plate and frame filter press, comprising the following steps: S1. Collection and transportation of sediment: Use professional dredging equipment to collect sediment from inland rivers; use mud pumps or other transportation equipment to transport sediment to the feed port of the program-controlled chamber filter press; S2, Filtration and Squeezing: After the bottom mud enters the filter chamber composed of two filter plates of the filter press, it is filtered through the filter cloth on the filter plates; after the filter chamber is filled with bottom mud, the filter plates are pressurized by high-pressure water or steam to squeeze and dehydrate; S3. Mud cake unloading and transportation: After dehydration is completed, the filter press plates are separated one by one using a plate pulling trolley, and the filter press plates are knocked using a knocking unloading device to unload the mud cake on the filter press plates; the mud cake is transported to the outside of the mud dump through a conveyor for landfill or other subsequent treatment.

[0016] Furthermore, step S3 further includes the following steps: S31: First, the plate pulling trolley is started to pull the filter press plate and the adjacent filter press plate apart, so that the mud cake on the filter press plate leaks out; S32: The pneumatic output device is started to drive the knocking rod to knock the filter press plate quickly and multiple times, and the gas discharged from the air outlet pipe of the pneumatic output device enters the air injection pipe; S33: After the knocking rod knocks and vibrates the material, when the gas pressure in the jet pipe gradually accumulates to a certain value, the high-pressure nozzle opens to quickly eject the gas in the jet pipe to quickly flush the side wall of the filter press plate; S34: The plate pulling trolley drives the filter press plate to slide close to other cleaned filter press plates, puts down the filter press plate and then slides to the next uncleaned filter press plate again, and performs vibration unloading on the next uncleaned filter press plate.

[0017] In summary, this application has the following technical effects: 1. By setting up a knocking unloading device, the driving device drives the knocking rod to slide in the limit hole, so that the knocking rod knocks the top of the filter press plate, so that the filter press plate is unloaded during the knocking vibration. The knocking unloading device can unload the mud plate when the plate pulling trolley drives the filter press plate to pull the plate, without pausing the movement of the filter press plate and letting the workers use tools to assist in unloading, thereby achieving the purpose of improving the unloading efficiency of the mud cake of the filter press; 2. By setting up a pneumatic output device and an air jet device, the pneumatically driven worm gear is used to output power, so that the pneumatic output device drives the knocking rod to knock the filter press plate. At the same time, the airflow output by the pneumatic output device enters the air jet pipe and finally sprays to the filter press plate through the high-pressure nozzle, so that the small pieces of debris mud cake on the filter press plate can be quickly discharged, further accelerating the discharge efficiency of the filter press mud cake; 3. By arranging multiple knocking rods and multiple pneumatic output devices, and arranging an air supply device to supply air to several air inlet pipes at the same time, the overall material unloading efficiency of the knocking unloading and the airflow impact unloading is enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a split concentrating plate and frame filter press of the present application; Figure 2 It is a structural schematic diagram of the knocking and unloading device of the present application; Figure 3 It is a schematic diagram of the structure in which the pneumatic output device of the present application drives the knocking rod to rise and fall; Figure 4 It is a schematic diagram of the internal structure of the pneumatic output device of the present application.

[0019] In the figure, 1, frame; 2, filter press plate; 3, plate pulling trolley; 4, knocking feeding device; 41, support frame; 42, knocking rod; 43, limit rod; 5, pneumatic output device; 51, shell; 52, air inlet pipe; 53, air outlet pipe; 54, turbine; 55, output shaft; 6, rotating rod; 7, linkage rod; 8, jet device; 81, jet pipe; 82, high-pressure nozzle; 9, gas transmission device; 91, gas transmission pipe; 92, gas transmission branch pipe; 10, flexible sleeve. DETAILED DESCRIPTION

[0020] The present application is further described in detail below in conjunction with the accompanying drawings.

[0021] Reference Figure 1 and Figure 2A split concentrating plate and frame filter press provided in this embodiment includes a frame 1, a filter plate 2 and a plate pulling trolley 3. A plurality of filter plates 2 are provided, and the plurality of filter plates 2 are arranged in the frame 1 in sequence. Two plate pulling trolleys 3 are provided, and the two plate pulling trolleys 3 are slidably connected to the frame 1. The two plate pulling trolleys 3 act on the filter plate 2 together, thereby driving the filter plate 2 to slide on the frame 1. A knocking and unloading device 4 is provided on the plate pulling trolley 3, and the plate pulling trolley 3 drives the knocking and unloading device 4 to slide along the frame 1, so that the knocking and unloading device 4 knocks on the top of the filter plate 2 in sequence with the plate pulling trolley 3, so that the filter plate 2 vibrates and accelerates the shedding of the mud cake.

[0022] Reference Figure 2 and Figure 3 The knocking unloading device 4 includes a support frame 41, a knocking rod 42 and a limit rod 43. The support frame 41 is arranged at the top of the filter press plate 2. The two ends of the support frame 41 are respectively fixedly connected to the two plate pulling trolleys 3. The two plate pulling trolleys 3 drive the support frame 41 to slide along the frame 1. The limit rod 43 and the knocking rod 42 are both arranged between the support frame 41 and the filter press plate 2. The limit rod 43 is parallel to the top of the filter press plate 2. The knocking rod 42 is perpendicular to the limit rod 43. A limit hole is provided on the limit rod 43. One end of the knocking rod 42 passes through the limit hole and abuts against the top of the filter press plate 2. The end of the knocking rod 42 away from the filter press plate 2 is arranged There is a driving device, which is used to drive the knocking rod 42 to slide in the limiting hole to knock the top of the filter press plate 2; a flexible sleeve 10 is provided on the knocking rod 42, and the flexible sleeve 10 is fixed to the end of the knocking rod 42 away from the driving device. In this embodiment, the support frame 41 includes a cross bar and a vertical rod, the cross bar is arranged at the top of the filter press plate 2, and two vertical rods are arranged, and the two vertical rods are respectively fixedly connected to the two ends of the cross bar, and the ends of the two vertical rods away from the cross bar are respectively fixedly connected to the two plate pulling trolleys 3. When the two vertical rods are fixedly connected to the plate pulling trolley 3, it is necessary to pay attention to that the vertical rods will not interfere with the plate pulling trolley 3 in dragging the filter press plate 2.

[0023] Reference Figure 2 and Figure 3 The driving device includes a pneumatic output device 5, a rotating rod 6 and a linkage rod 7. The pneumatic output device 5 is fixedly connected to the cross bar of the support frame 41. One end of the rotating rod 6 is connected to the pneumatic output device 5. The pneumatic output device 5 drives the rotating rod 6 to rotate, so that the rotating rod 6 makes a circular motion. The other end of the rotating rod 6 is rotationally connected to the linkage rod 7. The end of the linkage rod 7 away from the rotating rod 6 is rotationally connected to the knocking rod 42, so that the rotating rod 6 drives the knocking rod 42 to make a lifting motion in the vertical direction under the constraint of the limiting hole through the linkage rod 7, so that the knocking rod 42 slides in the limiting hole.

[0024] Reference Figure 3 and Figure 4The pneumatic output device 5 includes a shell 51, an air inlet pipe 52, an air outlet pipe 53, a turbine 54 and an output shaft 55. The shell 51 is fixedly connected to the support frame 41, and the air inlet pipe 52 and the air outlet pipe 53 are both fixedly connected to the shell 51. The turbine 54 is rotatably arranged in the shell 51. One end of the output shaft 55 passes through the shell 51 and is fixedly connected to the turbine 54. In this embodiment, the output shaft 55 and the turbine 54 are synchronously driven by a key connection. The output shaft 55 is rotatably connected to the shell 51, and one end of the output shaft 55 away from the turbine 54 is fixedly connected to the rotating rod 6. The turbine 54 is provided with blades. The air inlet pipe 52 is used to input high-pressure gas to blow the blades to drive the turbine 54 to rotate, and the air outlet pipe 53 is used to discharge the gas in the shell 51 that rotates with the blades of the turbine 54, so that the high-pressure gas continuously blown into the shell 51 drives the turbine 54 to rotate continuously.

[0025] Reference Figure 1 and Figure 2 The outlet pipe 53 is connected to an injection device 8, which includes an injection pipe 81 and a high-pressure nozzle 82. The injection pipe 81 is fixedly connected to the limit rod 43, and one end of the injection pipe 81 is fixedly connected to the outlet pipe 53. An injection hole is opened on the injection pipe 81, and the injection hole is arranged toward the filter press plate 2. The injection hole is used to spray high-speed airflow to wash the side wall of the filter press plate 2; a high-pressure nozzle 82 is arranged at each injection hole, and the high-pressure nozzle 82 is threadedly connected to the injection hole. In this embodiment, a one-way valve is arranged between the injection pipe 81 and the outlet pipe 53, and the one-way valve is used to prevent the backflow of gas from affecting the rotation of the turbine 54.

[0026] Reference Figure 1 and Figure 2 , there are multiple knocking rods 42, each knocking rod 42 is correspondingly provided with a driving device, each driving device corresponds to a pneumatic output device 5, the air inlet pipes 52 of all the pneumatic output devices 5 are connected to the air delivery device 9, the air delivery device 9 includes an air delivery pipe 91 and an air delivery branch pipe 92, the air delivery pipe 91 is arranged at the top of the support frame 41, the air delivery pipe 91 is connected to the air source, each air inlet pipe 52 corresponds to an air delivery branch pipe 92, the two ends of the air delivery branch pipe 92 are respectively fixedly connected to the air delivery pipe 91 and the air inlet pipe 52, the air delivery branch pipe 92 is used to connect the air delivery pipe 91 and the air inlet pipe 52; an air delivery hose is arranged between the air delivery pipe 91 and the air source, and the air delivery hose is used to cooperate with the movement of the plate pulling trolley 3 on the frame 1. In this embodiment, in order to improve the service life of the air delivery hose, the connecting lines of the air delivery hose and the control system of the plate pulling trolley 3 are arranged in the drag chain, and the drag chain is used to protect the connecting lines and the air delivery hose to improve the service life.

[0027] Reference Figure 1 and Figure 2In this embodiment, at least two knocking rods 42 are provided, and the air jets 81 of the pneumatic output device 5 corresponding to the two knocking rods 42 are respectively provided at the two ends of the limit rod 43, and the two air jets 81 are used to simultaneously perform air flow impact and material discharge on both sides of the filter press plate 2, thereby improving the efficiency of air flow impact and material discharge, and at the same time, the cleaning frequency of the filter press plate 2 can be reduced, thereby accelerating the efficiency of the filter press in treating the Huku bottom mud.

[0028] The implementation principle of a split thickening plate and frame filter press and a lake reservoir sludge dewatering process in the embodiment of the present application is as follows: when using the filter press, first move the plate pulling trolley 3 to the filter press plate 2 so that the plate pulling trolley 3 is engaged with the wing plate raised on the edge of the filter press plate 2. At this time, the plate pulling trolley 3 drives the support frame 41 to the top of the filter press plate 2. At this time, the gas source is started to convey high-pressure gas to the gas pipe 91, and the high-pressure gas in the gas pipe 91 is conveyed to the gas branch pipe 92. The gas in the gas branch pipe 92 is conveyed to the intake pipe 52. The high-pressure gas is blown to the blades on the turbine 54 through the intake pipe 52. The blades drive the turbine 54 to rotate under the blowing of the high-pressure gas. The rotation of the turbine 54 drives the output shaft 55 to rotate. The output shaft 55 drives the rotating rod 6 to make a circular motion. The rotating rod 6 drives the knocking rod 42 to perform vertical lifting and sliding under the constraint of the limit hole through the linkage rod 7. The knocking rod 42 slides up and down to impact the filter press plate 2. The filter press plate 2 is struck at a high frequency and quickly, and the mud cake on the filter press plate 2 falls off the filter press plate 2 under the vibration of the knocking. With the start-up of the pneumatic output device 5, the high-pressure gas is output from the air outlet pipe 53 to the jet pipe 81, so that the gas in the jet pipe 81 gradually accumulates. When the gas in the jet pipe 81 accumulates to a certain pressure, the high-pressure nozzle 82 on the jet pipe 81 is opened, so that the high-pressure airflow in the jet pipe 81 is sprayed to the two side walls of the filter press plate 2, thereby flushing the mud cake that has not completely fallen off the filter press plate 2 with air flow, so that the mud cake on the filter press plate 2 falls off quickly. When the mud cake on the filter press plate 2 falls off completely, the air source is closed and the high-pressure gas is no longer delivered to the air supply pipe 91. After the plate pulling trolley 3 drives the filter press plate 2 to slide to the cleaned filter press plate 2, the plate pulling trolley 3 puts down the filter press plate 2 and slides to another filter press plate 2 again, and vibrates and discharges the material during the process of pulling the plate of the other filter press plate 2.

[0029] A lake reservoir bottom mud dewatering process comprises the following steps: S1. Collection and transportation of sediment: Use professional dredging equipment to collect sediment from inland rivers; use mud pumps or other transportation equipment to transport sediment to the feed port of the program-controlled chamber filter press; S2. Filtration and pressing: After the sludge enters the filter chamber of the filter press, it is filtered through the filter cloth; after the filter chamber is filled with sludge, the diaphragm plate is pressurized by high-pressure water or steam to squeeze and dehydrate; S3. Mud cake unloading and transportation: After dehydration is completed, the plate pulling trolley 3 is used to drive the filter press plates 2 to be separated one by one, and the knocking unloading device 4 is used to knock the filter press plates 2, so as to unload the mud cake on the filter press plates 2; the mud cake is transported to the mud dump through a conveyor for landfill or other subsequent treatment.

[0030] Wherein, step S3 further includes the following steps: S31: First, the plate pulling trolley 3 is started to pull the filter press plate 2 and the adjacent filter press plate 2 apart, so that the mud cake on the filter press plate 2 leaks out; S32: The pneumatic output device 5 is started to drive the knocking rod 42 to knock the filter press plate 2 quickly and multiple times, and the gas discharged from the air outlet pipe 53 of the pneumatic output device 5 enters the air injection pipe 81; S33: After the knocking rod 42 knocks and vibrates the material, when the gas pressure in the jet pipe 81 reaches a certain value, the high-pressure nozzle 82 opens to quickly eject the gas in the jet pipe 81 to quickly flush the side wall of the filter press plate 2; S34: After the plate pulling trolley 3 drives the filter press plate 2 to slide to the cleaned filter press plate 2, the filter press plate 2 is put down and then it slides to another filter press plate 2 again, and the other filter press plate 2 is vibrated to discharge the material.

[0031] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A split concentrating plate-and-frame filter press, comprising a frame (1), a filter plate (2) and a plate-pulling trolley (3), wherein a plurality of filter plates (2) are arranged in the frame (1), two plate-pulling trolleys (3) are arranged, and the two plate-pulling trolleys (3) are both slidably connected to the frame (1), and the two plate-pulling trolleys (3) act together to drive the filter plate (2) to slide on the frame (1), characterized in that: The plate pulling trolley (3) is provided with a knocking and unloading device (4), and the knocking and unloading device (4) is used to knock the filter press plate (2); The knocking unloading device (4) comprises a support frame (41), a knocking rod (42) and a limiting rod (43). The support frame (41) is arranged at the top end of the filter press plate (2). The two ends of the support frame (41) are respectively fixedly connected to two plate pulling trolleys (3). The two plate pulling trolleys (3) drive the support frame (41) to slide along the frame (1). The limiting rod (43) and the knocking rod (42) are both arranged between the support frame (41) and the filter press plate (2). The limiting rod (43) is parallel to the top end of the filter press plate (2). The knocking rod (42) is perpendicular to the limiting rod (43). A limiting hole is provided on the limiting rod (43). One end of the knocking rod (42) passes through the limiting hole and abuts against the top end of the filter press plate (2). A driving device is provided at one end of the knocking rod (42) away from the filter press plate (2). The driving device is used to drive the knocking rod (42) to slide in the limiting hole to knock the top end of the filter press plate (2).

2. A split concentrating plate-and-frame filter press according to claim 1, characterized in that: The driving device comprises a pneumatic output device (5), a rotating rod (6) and a linkage rod (7); the pneumatic output device (5) is fixedly connected to the support frame (41); one end of the rotating rod (6) is connected to the pneumatic output device (5); the pneumatic output device (5) drives the rotating rod (6) to rotate; the other end of the rotating rod (6) is rotationally connected to the linkage rod (7); and one end of the linkage rod (7) away from the rotating rod (6) is rotationally connected to the knocking rod (42).

3. A split concentrating plate-and-frame filter press according to claim 2, characterized in that: The pneumatic output device (5) comprises a housing (51), an air inlet pipe (52), an air outlet pipe (53), a turbine (54) and an output shaft (55); the housing (51) is fixedly connected to a support frame (41); the air inlet pipe (52) and the air outlet pipe (53) are both fixedly connected to the housing (51); the turbine (54) is rotatably arranged in the housing (51); one end of the output shaft (55) passes through the housing (51) and is fixedly connected to the turbine (54); the output shaft (55) is rotatably connected to the housing (51); one end of the output shaft (55) away from the turbine (54) is fixedly connected to a rotating rod (6); blades are arranged on the turbine (54); the air inlet pipe (52) is used to input high-pressure gas to blow the blades to drive the turbine (54) to rotate; the air outlet pipe (53) is used to discharge the gas in the housing (51) that rotates with the blades of the turbine (54).

4. The split concentrating plate-and-frame filter press according to claim 3, characterized in that: The air outlet pipe (53) is connected to an air jet device (8), the air jet device (8) comprising an air jet pipe (81), the air jet pipe (81) being fixedly connected to the limit rod (43), one end of the air jet pipe (81) being fixedly connected to the air outlet pipe (53), an air jet hole being provided on the air jet pipe (81), the air jet hole being arranged toward the filter press plate (2), the air jet hole being used to eject a high-speed air flow to flush the side wall of the filter press plate (2).

5. The split concentrating plate-and-frame filter press according to claim 4, characterized in that: A high-pressure nozzle (82) is provided at each of the air jet holes, and the high-pressure nozzle (82) is threadedly connected to the air jet hole.

6. A split concentrating plate-and-frame filter press according to claim 5, characterized in that: A plurality of knocking rods (42) are provided, each knocking rod (42) is provided with a corresponding driving device, each driving device corresponds to a pneumatic output device (5), the air inlet pipes (52) of all the pneumatic output devices (5) are connected to an air delivery device (9), the air delivery device (9) comprises an air delivery pipe (91) and an air delivery branch pipe (92), the air delivery pipe (91) is provided at the top end of the support frame (41), the air delivery pipe (91) is connected to an air source, each air inlet pipe (52) corresponds to an air delivery branch pipe (92), two ends of the air delivery branch pipe (92) are respectively fixedly connected to the air delivery pipe (91) and the air inlet pipe (52), and the air delivery branch pipe (92) is used to connect the air delivery pipe (91) and the air inlet pipe (52).

7. The split concentrating plate-and-frame filter press according to claim 6, characterized in that: An air delivery hose is provided between the air delivery pipe (91) and the air source, and the air delivery hose is used to cooperate with the movement of the plate pulling trolley (3) on the frame (1).

8. The split concentrating plate-and-frame filter press according to claim 1, characterized in that: The knocking rod (42) is provided with a flexible sleeve (10), and the flexible sleeve (10) is fixed to an end of the knocking rod (42) away from the driving device.

9. A lake sludge dewatering process, using the split thickening plate-and-frame filter press according to any one of claims 5 to 8, characterized in that: The following steps are involved: S1. Collection and transportation of sediment: Use professional dredging equipment to collect sediment from inland rivers; use mud pumps to transport sediment to the feed port of the program-controlled chamber filter press; S2. Filtration and pressing: After the sludge enters the filter chamber of the filter press, it is filtered through the filter cloth; after the filter chamber is filled with sludge, the diaphragm plate is pressurized by high-pressure water or steam to squeeze and dehydrate; S3. Mud cake unloading and transportation: After dehydration is completed, the filter press plates (2) are separated one by one by using the plate pulling trolley (3), and the filter press plates (2) are knocked by the knocking unloading device (4), so as to unload the mud cake on the filter press plates (2); the mud cake is transported to the mud dump through a conveyor for landfill or other subsequent treatment.

10. A lake and reservoir sludge dewatering process according to claim 9, characterized in that: Step S3 also includes the following steps: S31: firstly, starting the plate pulling trolley (3) to pull the filter press plate (2) away from the adjacent filter press plate (2), so that the mud cake on the filter press plate (2) leaks out; S32: starting the pneumatic output device (5) to drive the knocking rod (42) to knock the filter press plate (2) multiple times and quickly, and the gas discharged from the air outlet pipe (53) of the pneumatic output device (5) enters the air injection pipe (81); S33: After the knocking rod (42) knocks and vibrates the material, when the gas pressure in the jet pipe (81) reaches a certain value, the high-pressure nozzle (82) opens to quickly eject the gas in the jet pipe (81) to quickly flush the side wall of the filter press plate (2); S34: The plate pulling trolley (3) drives the filter press plate (2) to slide to the cleaned filter press plate (2), puts down the filter press plate (2) and then slides to another filter press plate (2), and performs vibration unloading on the other filter press plate (2).

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