Oil stain cleaning device for sludge dewatering plate frame

Abstract

The utility model relates to the field of filter pressing equipment cleaning systems, in particular to a sludge dewatering plate frame greasy dirt cleaning device which comprises a rack and a water tank arranged on the rack, one side of the water tank is connected with a cleaning pipeline, a cleaning water pump is installed in the middle of the cleaning pipeline, and a heat exchange pipe is installed in the water tank; the two ends of the heat exchange pipe vertically extend upwards to the outer side of the water tank and are connected with a circulating pipe, the end, away from the water tank, of the circulating pipe is connected with a heat supply source, and a circulating pump is installed in the middle of the circulating pipe. The cleaning fluid prepared in the water tank is pumped into the plate-and-frame filter pressing equipment under the action of the cleaning water pump and further introduced into the filter pressing cavity, and the cleaning fluid is reserved in the filter pressing cavity for a certain time, fully reacts with residual oil-containing impurities and then is discharged from the filter pressing cavity; complicated cleaning equipment does not need to be additionally arranged and the filter pressing plate frame does not need to be disassembled in the whole cleaning process, so that the cleaning efficiency is high and the operation is simple.

Description

Technical Field

[0001] This application relates to the technical field of filter press equipment cleaning systems, and particularly relates to an oil stain cleaning device for sludge dewatering plate frames. Background Art

[0002] The plate and frame filter press is an important mechanical equipment widely used in fields such as sludge dewatering. Its function is to press the sludge remaining after sewage treatment to form large filter cakes for subsequent removal and treatment. Currently, most sewage treatment plants receive mixed wastewater of industrial wastewater and domestic sewage, and industrial wastewater usually contains a large amount of oil stains. There is no good means to remove the oil stains after they enter the sewage treatment plant, resulting in a large amount of oil stains entering the plate and frame filter press along with the remaining sludge.

[0003] In related technologies, when using a plate and frame filter press to treat sludge, a large amount of oil stains will increase the viscosity of the sludge. After the sludge is dewatered by filtration, it is difficult for the oil stains to flow out with the filtrate and is likely to remain in the filter chamber, seriously affecting the sludge filtration and dewatering effect. The existing plate and frame cleaning methods generally use separate flushing equipment installed on the filter press. After filtration is completed, each filter plate is separated, and the flushing equipment moves on the filter press in sequence to flush each filter plate in sequence. Or each filter plate is removed and immersed in a cleaning solution to make the oil stains and impurities remaining on the filter plate detach from the filter plate, thereby achieving the cleaning of the filter plate.

[0004] The problems existing in related technologies are that installing separate flushing equipment on the filter press has too high a cleaning cost, complex structure, and difficult maintenance. Removing each filter plate for immersion requires a large amount of labor and high operation difficulty. If the oil stains in the filter chamber are not processed in a timely manner, it will affect the dewatering effect of the sludge subsequently introduced into the plate and frame filter press. Utility Model Content

[0005] In order to improve the cleaning effect of the filter plates of the plate and frame filter press equipment and avoid the remaining oil stains and impurities in the filter plates from affecting subsequent dewatering operations, this application provides an oil stain cleaning device for sludge dewatering plate frames.

[0006] An oil stain cleaning device for sludge dewatering plate frames provided by this application adopts the following technical solutions:

[0007] An oil stain cleaning device for sludge dewatering plate frames includes a frame and a water tank arranged on the frame. One side of the water tank is connected with a cleaning pipeline, and the end of the cleaning pipeline far away from the water tank is connected to the plate and frame filter equipment. A cleaning water pump is installed in the middle of the cleaning pipeline. A heat exchange pipe is installed in the water tank. Both ends of the heat exchange pipe extend vertically upward to the outside of the water tank and are connected with a circulation pipe. The end of the circulation pipe far away from the water tank is connected to a heat supply source. A circulation pump is installed in the middle of the circulation pipe. The water tank is threadedly connected with a main cover body, and a stirring assembly is arranged on the main cover body.

[0008] By adopting the above technical solution, the water tank, the cleaning water pump and the cleaning pipeline are cooperatively arranged. The cleaning liquid configured in the water tank is pumped into the plate and frame filter press equipment through the cleaning pipeline under the action of the cleaning water pump, and further introduced into the filter chamber. The cleaning liquid stays in the filter chamber for a certain period of time, fully reacts with the residual oil-containing sundries, and then is discharged from the filter chamber. The whole cleaning process does not require additional complex cleaning equipment and disassembly of the filter plate and frame, so the cleaning efficiency is high and the operation is simple.

[0009] The heat supply source, the circulation pump, the circulation pipe and the heat exchange pipe are cooperatively arranged, and can heat the cleaning liquid in the water tank to improve the cleaning effect.

[0010] Optionally, the stirring assembly includes a stirring motor installed on the main cover body. The output shaft of the stirring motor extends downward through the main cover body into the water tank. The output shaft of the stirring motor is connected with a stirring paddle, and the central axis of the stirring paddle coincides with the central axis of the water tank.

[0011] By adopting the above technical solution, the stirring motor drives the stirring paddle to rotate in the water tank, thereby agitating the cleaning liquid, so that when the staff adds additives, the mixed liquid in the water tank can be mixed evenly to ensure the cleaning effect.

[0012] Optionally, the frame includes a support base and a fence formed on the upper surface of the support base. A liquid collecting groove recessed downward is formed on the surface of the support base facing the water tank. A grille plate is arranged at the notch of the liquid collecting groove. The water tank is arranged on the grille plate, and the fence surrounds the water tank on all sides.

[0013] By adopting the above technical solution, the fence can protect the water tank from shaking or being damaged under the influence of external forces. The cooperation of the grille plate and the liquid collecting groove can collect the cleaning liquid leaked from the water tank during the cleaning process to prevent external leakage.

[0014] Optionally, a liquid adding port penetrating up and down is formed on the main cover body, and a sub-cover body is threadedly connected to the liquid adding port.

[0015] By adopting the above technical solution, the liquid adding port can be used by the staff to add clean water, additives, etc. into the water tank, and the sub-cover body is used to seal the liquid adding port to prevent other sundries from entering.

[0016] Optionally, an inner substrate is arranged in the liquid adding port. A first hole body through which a water pipe can pass is opened on the inner substrate. A plurality of elastic fasteners are evenly distributed in a ring shape inside the first hole body. One end of each elastic fastener is fixedly connected to the peripheral wall of the first hole body formed by the inner substrate, and the other end extends in a direction perpendicular to the plane where the inner substrate is located and inclines towards the middle of the first hole body.

[0017] By adopting the above technical solution, the first hole body is used for the pipeline to pass through, and the elastic fastener can apply a certain clamping force to the outer periphery of the pipeline end, avoiding random swinging of the pipeline end when the water pressure is too high.

[0018] Optionally, a second hole body is further formed on the inner base plate, and a multi-stage pipe group is arranged in the second hole body. The multi-stage pipe group has an input port and multiple output ports. The input port of the multi-stage pipe group extends above the liquid adding port through the second hole body, and the multiple output ports are distributed at intervals along the height direction of the water tank in the water tank.

[0019] By adopting the above technical solution, the additive is added through the input port of the multi-stage pipe group and then discharged from the multiple output ports into the water tank. Since the multiple output ports are distributed at intervals along the height direction of the water tank, the additive can be added to different positions of the water tank simultaneously, which can improve the mixing effect of the additive and the cleaning liquid.

[0020] Optionally, the multi-stage pipe group includes a main pipeline and multiple sub-pipelines. The input port of the multi-stage pipe group is formed at one end of the main pipeline, and one of the output ports is formed at the other end of the main pipeline. Each sub-pipeline is communicated with the main pipeline, and the communication part is arranged at one end of the main pipeline close to the input port. The remaining several output ports of the multi-stage pipe group are formed at the ends of the sub-pipelines far from the main pipeline.

[0021] By adopting the above technical solution, the additive is added into the main pipeline through the input port. When the additive flows towards the output port on the main pipeline, it passes through the communication parts of the sub-pipelines and is partially diverted into each sub-pipeline, and then flows towards the remaining output ports along the sub-pipelines, so as to realize adding the additive to different areas of the water tank.

[0022] Optionally, a receiving part is arranged at the communication part between the sub-pipeline and the main pipeline, and one end of the receiving part extends into the main pipeline and inclines towards the direction close to the input port.

[0023] By adopting the above technical solution, the arrangement of the receiving part makes it easier for the additive in the main pipeline to be diverted into each sub-pipeline.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The water tank, the cleaning water pump and the cleaning pipeline are cooperatively arranged. Under the action of the cleaning water pump, the cleaning liquid configured in the water tank is pumped into the plate and frame filter press equipment through the cleaning pipeline and further introduced into the filter chamber. The cleaning liquid stays in the filter chamber for a certain period of time, fully reacts with the residual oil-containing impurities, and then is discharged from the filter chamber. The whole cleaning process does not require additional complex cleaning equipment and disassembly of the filter plate frame, so the cleaning efficiency is high and the operation is simple. The heat source, the circulation pump, the circulation pipe and the heat exchange pipe are cooperatively arranged, which can heat the cleaning liquid in the water tank and improve the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the main structure of an embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the front cross-sectional structure of the frame of the embodiment of the present application.

[0028] Figure 3 It is a schematic diagram of the top cross-sectional structure of the frame and water tank of the embodiment of the present application.

[0029] Figure 4 It is a schematic diagram of the front cross-sectional structure of the water tank of the embodiment of the present application.

[0030] Figure 5 yes Figure 4 A schematic diagram of the enlarged structure at point A in the middle.

[0031] Figure 6 It is a front view structural diagram of the multi-stage tube group according to an embodiment of the present application.

[0032] Figure numerals: 1, frame; 101, support base; 102, fence; 2, water tank; 3, cleaning pipe; 4, cleaning water pump; 5, heat exchange tube; 6, circulation pipe; 7, circulation pump; 8, main cover; 9, stirring assembly; 91, stirring motor; 92, stirring paddle; 10, liquid collecting tank; 11, grid plate; 12, liquid filling port; 13, auxiliary cover; 14, inner base plate; 15, elastic fastener; 16, multi-stage pipe group; 161, main pipeline; 162, auxiliary pipeline; 163, receiving part. DETAILED DESCRIPTION

[0033] The following is combined with Figures 1-6 This application is described in further detail.

[0034] The present application discloses a sludge dehydration plate frame oil cleaning device, which is particularly suitable for a sludge drying treatment system. Figure 1 A sludge dewatering plate and frame oil cleaning device includes a frame 1 and a water tank 2 arranged on the frame 1. The water tank 2 is a thin-walled cylindrical structure for containing cleaning liquid. A liquid outlet is opened on one side of the water tank 2. The liquid outlet is preferably arranged at the lower end of the water tank 2. A cleaning pipe 3 is connected to the liquid outlet. The end of the cleaning pipe 3 away from the water tank 2 is connected to the plate and frame filter press equipment. In order to deliver the cleaning liquid contained in the water tank 2 to the plate and frame filter press, a cleaning water pump 4 is installed in the middle of the cleaning pipe 3.

[0035] The plate and frame filter press equipment has multiple slidable filter plates. Each filter plate is of a substantially rectangular structure, and its two largest side surfaces are located in a vertical plane. Grooves are formed on both of the two largest side surfaces and recess inward. When the multiple filter plates are in contact with each other, the grooves of adjacent two filter plates are spliced together to form a filter chamber, and the dewatering material is introduced into the filter chamber for filter press dewatering.

[0036] Further, water inlets and water outlets are provided at the corners of each filter plate. The cleaning pipeline 3 is connected to the plate and frame filter press. Specifically, one end of the cleaning pipeline 3 is connected to the water inlet of one of the filter plates (preferably the outermost filter plate). When the multiple filter plates are in contact with each other, the water inlets formed on each filter plate are interconnected to form an inlet water flow channel, and the inlet water flow channel is connected to each filter chamber. Correspondingly, the water outlets formed on each filter plate are interconnected to form an outlet water flow channel, and the outlet water flow channel is connected to each filter chamber.

[0037] With the above structure, the cleaning water pump 4 can pump out the cleaning liquid in the water tank 2, pump it through the cleaning pipeline 3 to the inlet water flow channel, and then flow through the inlet water flow channel to each filter chamber, fully react with the residual impurities in each filter chamber, and then the impurities are discharged from the outlet water flow channel along with the cleaning liquid. In this way, each filter plate after a dewatering operation is cleaned to prevent impurities from remaining in the filter chamber and affecting the subsequent dewatering operation. The above plate and frame filter press equipment belongs to the prior art and will not be elaborated here.

[0038] Preferably, referring to Figure 2 and Figure 3 , the frame 1 includes a support base 101 that provides bottom support for the water tank 2. The support base 101 is of a rectangular block structure. A liquid collection groove 10 is formed on the surface of the support base 101 facing the water tank 2. A grating plate 11 is installed at the notch of the liquid collection groove 10, and the upper surface of the grating plate 11 is flush with the upper surface of the support base 101. The water tank 2 is placed on the grating plate 11. During the process of adding the cleaning liquid into the water tank 2 and the cleaning water pump 4 pumping the cleaning liquid out of the water tank 2 to the cleaning pipeline 3, a small amount of leakage of the cleaning liquid is inevitable. Through the arrangement of the grating plate 11 and the liquid collection groove 10, the leaked cleaning liquid can be collected to prevent it from leaking to the external environment.

[0039] The frame 1 further includes a fence 102 surrounding the water tank 2. The fence 102 is set as a rectangular frame matching the support base 101. The lower end of the fence 102 is fixedly connected to the support base 101, which can protect the water tank 2 to prevent an external object from bumping into the water tank 2 and causing the surface of the water tank 2 to be dented or even cracked.

[0040] The upper end of the water inlet tank 2 is set to be open, and a main cover body 8 is connected at the opening. The liquid adding port 12 is formed on the main cover body 8, and a stirring assembly 9 is installed on the main cover body 8 for stirring the clear water and the chemical cleaning agent in the water tank 2 after the chemical cleaning agent is added, so that the two are evenly mixed.

[0041] Furthermore, the stirring assembly 9 includes a stirring motor 91 installed on the outer surface of the main cover body 8. A vertically penetrating shaft hole is provided on the main cover body 8. The output shaft of the stirring motor 91 passes through the shaft hole and extends into the water tank 2. The output shaft of the stirring motor 91 is connected with a stirring paddle 92. When the output shaft rotates, the stirring paddle 92 rotates simultaneously, thereby stirring the clear water and the chemical cleaning agent in the water tank 2.

[0042] With the above structure, the stirring assembly 9 is arranged on the main cover body 8. When the water tank 2 needs to be cleaned, the main cover body 8 can be removed, and the stirring assembly 9 can be taken out of the water tank 2 together with the main cover body 8, so as to facilitate the staff to clean and maintain the stirring assembly 9 and the inside of the water tank 2 respectively.

[0043] Refer to Figure 4 and Figure 5 , a liquid adding port 12 is provided on the water tank 2. The liquid adding port 12 is for the staff to add cleaning liquid into the water tank 2. The cleaning liquid is preferably a mixed liquid composed of clear water and chemical cleaning agent. When preparing the cleaning liquid, first the staff adds clear water into the water tank 2, and then adds the chemical cleaning agent. After the clear water and the chemical cleaning agent are added, in order to prevent foreign matters from entering the water tank 2 through the liquid adding port 12, a sub-cover body 13 is threadedly connected at the liquid adding port 12. The sub-cover body 13 can seal the liquid adding port 12 to prevent foreign matters from entering the water tank 2.

[0044] An inner base plate 14 is arranged in the liquid adding port 12. The plane where the inner base plate 14 is located is parallel to the cross-section of the liquid adding port 12, and the outer periphery of the inner base plate 14 is fixed to the inner wall of the liquid adding port 12. A first hole and a second hole are provided on the inner base plate 14. The first hole is for the staff to add clear water into the water tank 2 through the liquid adding port 12, and the second hole is for the staff to add additives through the liquid adding port 12. It can be understood that, as the main component of the cleaning liquid in the water tank 2, the content of clear water is much larger than that of the additives. Therefore, the size of the first hole should be larger than that of the second hole.

[0045] Furthermore, a plurality of elastic fasteners 15 are arranged on the inner side wall of the inner base plate 14 that forms the first hole. A clamping hole that can clamp the pipeline is formed by enclosing among the plurality of elastic fasteners 15. When the staff adds clear water into the water tank 2, the pipeline for conveying clear water can be inserted into the clamping hole. The plurality of elastic fasteners 15 are simultaneously squeezed and deformed, and through the reaction force exerted by each elastic fastener 15 on the outer wall of the pipeline, the pipeline is clamped and fixed to prevent the pipeline end from swinging randomly when high-pressure clear water is output.

[0046] Specifically, a plurality of elastic fasteners 15 are evenly distributed in a ring shape inside the first hole body. One end of each elastic fastener 15 is fixedly connected to the inner wall of the first hole body formed by the inner base plate 14, and the other end extends vertically downward and washes towards the middle of the first hole body, forming a socket with a large upper diameter and a small lower diameter. The upper diameter should be set to be adapted to the outer diameter of the pipeline for conveying clean water. When the pipeline is inserted into the first hole body, the outer wall of the pipeline deforms the end of the elastic fastener 15 away from the inner base plate 14 outward, and at the same time exerts a reaction force on the outer wall of the pipeline to achieve clamping. The elastic fastener 15 can specifically be an elastic metal block with a fixed shape.

[0047] Furthermore, referring to Figure 4 and Figure 6 , a multi-stage pipe group 16 is arranged inside the second hole body. The multi-stage pipe group 16 includes a main pipeline 161 and a plurality of sub-pipelines 162. The plurality of sub-pipelines 162 are all connected to the main pipeline 161. One end of the main pipeline 161 passes through the second hole body and extends towards the outer end of the liquid adding port 12. The end of the main pipeline 161 extending above the inner base plate 14 is provided with an input port for the additive. The other end of the main pipeline 161 extends vertically into the water tank 2 and is provided with one of the output ports for the additive; one end of each sub-pipeline 162 connected to the main pipeline 161 is close to the input port for the additive, and the other end of each sub-pipeline 162 extends vertically into the water tank 2 and is respectively provided with an output port for the additive. The output ports arranged on the main pipeline 161 and each sub-pipeline 162 are spaced apart in the height direction of the water tank 2.

[0048] With the above structure, when adding the additive into the water tank 2, the additive is added from the input port of the main pipeline 161. Part of the additive flows downward in the main pipeline 161 to the output port and is discharged into the water tank 2, and the remaining part of the additive respectively flows into each sub-pipeline 162. The additive in each sub-pipeline 162 flows downward to the output port and is discharged into the water tank 2. Since the heights of the output ports are different, the additive can be simultaneously put into different areas of the water tank 2, making it more uniform when mixed with clean water.

[0049] Preferably, a receiving portion 163 is arranged at the connection between the main pipeline 161 and the sub-pipeline 162. The receiving portion 163 is a short cylindrical structure. One end of it extends into the main pipeline 161 and inclines towards the direction close to the input port. The other end of the receiving portion 163 is connected to the sub-pipeline 162. It can enable the additive to be shunted into the sub-pipeline 162 through the receiving portion 163 after entering the main pipeline 161.

[0050] In addition, after the clear water and additives are added, to prevent foreign objects from entering the water tank 2 through the liquid filling port 12, a secondary cover body 13 is threadedly connected to the liquid filling port 12. The secondary cover body 13 can seal the liquid filling port 12, thus playing a protective role.

[0051] Referring to Figure 4 , a heat exchange component is arranged in the water tank 2. The heat exchange component is composed of a heat exchange tube 5, a circulation tube 6, a circulation pump 7 and a heat supply source. The shape of the heat exchange tube 5 is spiral and it is arranged in the water tank 2. The upper end and the lower end of the heat exchange tube 5 both extend upward to the outside of the water tank 2. One end of the circulation tube 6 is connected to both ends of the heat exchange tube 5, and the other end is connected to the heat supply source. The circulation pump 7 is installed in the middle of the circulation tube 6.

[0052] The heat supply source is used to provide a heat exchange medium into the circulation tube 6. The heat exchange medium is a high-temperature liquid or gas, etc. The circulation pump 7 pumps the heat exchange medium in the circulation tube 6 into the heat exchange tube 5, so that the heat exchange medium circulates between the heat exchange tube 5, the circulation tube 6 and the heat supply source, to heat the cleaning liquid in the water tank 2 and improve the cleaning efficiency of the cleaning liquid for each filter plate of the plate and frame filter press. The heat supply source can adopt a hot water container in an industrial sludge drying and dewatering system, or other heating equipment independently set, and no specific limitation is made here.

[0053] The implementation principle of a sludge dewatering plate and frame oil stain cleaning device in an embodiment of the present application is as follows: When the plate and frame filter press is working, the oily sludge is introduced into the plate and frame filter press for dewatering. After the dewatering is completed, each filter plate is separated for discharging.

[0054] When the filter plates need to be cleaned, first, clear water and chemical agents are added into the water tank 2. At the same time, the circulation pump 7 pumps out the heat exchange medium in the heat supply source, and transports it to the heat exchange tube 5 through the circulation tube 6, so that the heat exchange medium circulates in the heat exchange tube 5 to heat the mixed liquid in the water tank 2. During the heating process, the stirring motor 91 is started to drive the stirring paddle 92 to rotate in the water tank 2 to stir the mixed liquid to make the clear water and the chemical agents mix evenly.

[0055] Then, control each filter plate on the plate and frame filter press to abut against each other, so that a sealed pressure filtration cavity is re-formed between the filter plates. At this time, the cleaning water pump 4 starts to act, pumps the cleaning liquid in the water tank 2 into the cleaning pipeline 3. The high-pressure cleaning liquid in the cleaning pipeline 3 flows towards the plate and frame filter press, and enters each pressure filtration cavity through the filter plates. It stays in each pressure filtration cavity for a certain time, so that the mixed liquid reacts fully with the residual oily impurities in the pressure filtration cavity. The oily impurities decompose and finally are discharged out of the filter press together with the mixed liquid, thereby realizing the full cleaning of each filter plate of the plate and frame filter press.

[0056] The above are all preferred embodiments of this application, and do not limit the protection scope of this application. Therefore, any equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A sludge dewatering plate frame oil cleaning device, characterized by: The invention comprises a frame (1) and a water tank (2) arranged on the frame (1), one side of the water tank (2) is connected to a cleaning pipe (3), the end of the cleaning pipe (3) away from the water tank (2) is connected to a plate and frame filter press device, a cleaning water pump (4) is installed in the middle of the cleaning pipe (3), a heat exchange pipe (5) is installed in the water tank (2), both ends of the heat exchange pipe (5) extend vertically upward to the outside of the water tank (2) and are connected to a circulation pipe (6), the end of the circulation pipe (6) away from the water tank (2) is connected to a heat source, a circulation pump (7) is installed in the middle of the circulation pipe (6), a main cover body (8) is threadedly connected to the water tank (2), and a stirring assembly (9) is arranged on the main cover body (8).

2. A sludge dewatering plate frame oil cleaning device according to claim 1, characterized in that: The stirring assembly (9) comprises a stirring motor (91) mounted on the main cover (8), the output shaft of the stirring motor (91) passing downward through the main cover (8) and extending into the water tank (2), the output shaft of the stirring motor (91) being connected to a stirring paddle (92), the central axis of the stirring paddle (92) coinciding with the central axis of the water tank (2).

3. The sludge dewatering plate frame oil cleaning device according to claim 1, characterized in that: The frame (1) comprises a support base (101) and a fence (102) formed on the upper surface of the support base (101); a downwardly recessed liquid collecting trough (10) is formed on a side of the support base (101) facing the water tank (2); a grid plate (11) is provided at a notch of the liquid collecting trough (10); the water tank (2) is provided on the grid plate (11); and the fence (102) is provided around the water tank (2).

4. The sludge dewatering plate frame oil cleaning device according to claim 1, characterized in that: The main cover body (8) is formed with a liquid filling port (12) which passes through from top to bottom, and the liquid filling port (12) is threadedly connected to a secondary cover body (13).

5. The sludge dewatering plate frame oil cleaning device according to claim 4, characterized in that: An inner base plate (14) is arranged inside the liquid filling port (12), a first hole body through which a water pipe can pass is opened on the inner base plate (14), a plurality of elastic fasteners (15) evenly distributed in a ring shape are arranged inside the first hole body, one end of each of the elastic fasteners (15) is fixedly connected to the peripheral wall of the first hole body formed by the inner base plate (14), and the other end extends in a direction perpendicular to the plane where the inner base plate (14) is located and is inclined toward the middle of the first hole body.

6. A sludge dewatering plate frame oil cleaning device according to claim 5, characterized in that: A second hole body is also formed on the inner base plate (14), and a multistage tube group (16) is arranged in the second hole body. The multistage tube group (16) has an input port and a plurality of output ports. The input port of the multistage tube group (16) extends through the second hole body to above the liquid filling port (12), and the plurality of output ports are spaced apart in the water tank (2) along the height direction of the water tank (2).

7. The sludge dewatering plate frame oil cleaning device according to claim 6, characterized in that: The multistage pipe group (16) comprises a main pipe (161) and a plurality of auxiliary pipes (162); an input port of the multistage pipe group (16) is formed at one end of the main pipe (161); an output port is formed at the other end of the main pipe (161); each of the auxiliary pipes (162) is connected to the main pipe (161); and the connection point is arranged at one end of the main pipe (161) close to the input port; the remaining plurality of output ports of the multistage pipe group (16) are formed at one end of each auxiliary pipe (162) away from the main pipe (161).

8. The sludge dewatering plate frame oil cleaning device according to claim 7, characterized in that: A receiving portion (163) is provided at the connection point between the secondary pipe (162) and the main pipe (161); one end of the receiving portion (163) extends horizontally into the main pipe (161) and is inclined towards a direction close to the input port.

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