Oily sludge reduction cleaning equipment

Abstract

The embodiment of the invention provides oily sludge reduction cleaning equipment, and relates to the technical field of oil exploitation and refinement, the oily sludge reduction cleaning equipment comprises an equipment body, the equipment body comprises a scraping and floating oil filtering module, an oil sludge dewatering module and an oil sludge lifting module, the scraping and floating oil filtering module is internally provided with a feeding aeration area, a floating oil fishing area and a floating oil scraping area, an aeration device is arranged in the feeding aeration area, an oil extraction device is arranged in the floating oil fishing area, an oil scraping device is arranged in the floating oil scraping area, an oil outlet is formed in the tail end of the oil scraping device, an oil sludge propelling device is arranged at the bottom of the scraping floating oil filtering module, and the oil sludge lifting module is communicated with the scraping floating oil filtering module at the position, close to the tail, of the oil sludge propelling device. An oil sludge lifting device is arranged in the oil sludge lifting module, the oil sludge lifting device is connected with the oil sludge dehydration module, and an oil sludge dehydration device is arranged in the oil sludge dehydration module. The device has the effect of integrating cleaning, oil removal, degassing and dehydration.

Description

Technical Field

[0001] The present invention relates to the technical field of oil extraction and refining, and in particular to a device for reducing and cleaning oily sludge. Background Art

[0002] Oily sludge is generated throughout the entire oil extraction and production process. The large amount of petroleum hydrocarbons in the sludge are difficult to degrade, significantly impacting soil and groundwater, and is a global environmental issue. Approximately 800,000 tons of new sludge is generated in China each year, posing a significant threat to the environment.

[0003] The composition of oil sludge is complex, mainly heavy oil composed of adhesive tape and asphalt. It is a multi-emulsion system with very stable properties. The water in oil sludge is mainly bound water, and the water content can reach 80% after mechanical dehydration. Due to its stable nature, it is very difficult to separate the three phases of oil, water and mud, which makes the disposal of oil sludge more difficult. The environment where a large amount of oil sludge exists is desert areas or areas with severe soil salinization. After being contaminated by crude oil, the microbial activity in the soil is poor, and the oil sludge is even more difficult to degrade. Affected by the limitations of traditional remediation technology, the current oil sludge treatment equipment has a large footprint, high cost, single treatment function and poor treatment effect, low floating oil removal rate, and complex operation process of the treatment device. It cannot achieve cleaning, oil removal, degassing and dehydration in one. In summary, efficient and centralized oil sludge disposal equipment is an urgently needed method to solve the oil sludge problem. Summary of the Invention

[0004] In order to solve the above technical problems, the present application provides an oily sludge reduction and cleaning device.

[0005] The oily sludge reduction and cleaning equipment provided in this application adopts the following technical solutions:

[0006] A device for reducing and cleaning oil-containing sludge comprises a device body, which comprises a scraping and floating oil filtering module, a sludge dehydration module and a sludge lifting module in sequence, wherein the scraping and floating oil filtering module is provided with a feed aeration area, a floating oil salvage area and a floating oil scraping area in sequence, the feed aeration area is provided with an aeration device, the floating oil salvage area is provided with an oil lifting device, the floating oil scraping area is provided with an oil scraping device, an oil outlet is provided at the end of the scraping device, light floating oil adheres to the surface of the bubble, the bubble carries the floating oil to the liquid level surface and is collected by the oil lifting device and the scraping device, a sludge propulsion device is provided at the bottom of the scraping and floating oil filtering module, the sludge lifting module is connected with the scraping and floating oil filtering module near the tail position of the sludge propulsion device, a sludge lifting device is provided inside the sludge lifting module, the sludge lifting device is connected to the sludge dehydration module, and a sludge dehydration device is provided in the sludge dehydration module.

[0007] Furthermore, the oil sludge propulsion device is arranged horizontally, the oil sludge lifting device is arranged obliquely, a communication port is provided on the scraping and flotation oil filtering module, and the oil sludge propulsion device is connected to the oil sludge lifting device through the communication port.

[0008] Furthermore, the scraping and floating oil filtering module is internally fixed with mutually parallel steady flow water distribution plates, first oil separators and second oil separators, the two sides of the steady flow water distribution plates are respectively the feed aeration zone and the floating oil salvage zone, the first oil separator is located between the second oil separator and the steady flow water distribution plate, the floating oil salvage zone is between the second oil separator and the steady flow water distribution plate, the side of the second oil separator away from the first oil separator is the floating oil scraping zone, and the oil lifting device includes a first oil lifting device arranged between the first oil separator and the steady flow water distribution plate and a second oil lifting device arranged between the first oil separator and the second oil separator.

[0009] Furthermore, the oil scraping device is arranged at an angle, and the oil scraping device includes a mounting bucket, and the mounting bucket is rotatably connected to the equipment body through a rotating shaft at one end close to the oil outlet, and a telescopic rod is fixed to the other end of the mounting bucket, and a telescopic cylinder is fixed to the equipment body, and a connecting block is fixed to the end of the telescopic cylinder connecting rod, and the telescopic rod is rotatably connected to the connecting block and drives the mounting bucket to rotate during the up and down movement. The oil scraping device also includes an oil scraping mechanism arranged in the mounting bucket and used for feeding.

[0010] Furthermore, the oil scraping mechanism includes a sprocket rotatably connected to the mounting bucket, a rotating motor for driving the sprocket to rotate is fixed on the mounting bucket, a chain connected to the sprocket on the same side is provided on the sprocket, an oil scraper connecting the two chains is fixed on the chain, an oil collecting tank is installed at the bottom of the oil outlet, and a lower oil plate for scraping the oil on the scraper plate into the oil collecting tank is fixed on the equipment body.

[0011] Furthermore, the cross-section of the oil scraper is rhombus-shaped, and the four corners of the rhombus are rotatably connected to rotating shafts. A driving motor is fixed on the oil scraper to drive one of the rotating shafts to rotate, and an oil scraper belt is provided on the rotating shaft that surrounds the four rotating shafts. Mounting blocks are fixed at the center positions of both ends of the oil scraper, and the mounting blocks are fixedly connected to the chain.

[0012] Furthermore, an arc-shaped bottom plate is fixed to the bottom of the scraping and floating oil filtering module and the bottom of the sludge lifting module. The arc-shaped bottom plate is coaxial with the rotating shaft of the sludge propulsion device and the sludge lifting device. An inclined baffle is fixed to one side of the arc-shaped bottom plate located in the scraping and floating oil filtering module, and the aeration device is installed on the inclined baffle.

[0013] Furthermore, a slurry tank is also provided in the main body of the equipment, which is located below the sludge dehydration device. An overflow pipe is connected to the sludge lifting module, and the overflow pipe is connected to the slurry tank. The upper mud after cleaning the mud and sand flows into the slurry tank through the overflow pipe. A submersible pump is installed inside the slurry tank to facilitate the discharge of slurry.

[0014] Furthermore, the equipment body is connected with a degassing pipeline for facilitating gas discharge and collection.

[0015] Furthermore, the oil sludge dehydration device is a mud separator; the first oil extraction device and the second oil extraction device are steel belt oil scrapers.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: oil-containing mud is fed into the equipment body from the feed aeration zone. Under the action of the aeration device below, light floating oil adheres to the surface of the bubbles. The bubbles carry the floating oil and rise to the surface of the liquid level. The floating oil is stratified with the water below. The floating oil floats above the liquid surface and is enriched by the flow-stabilizing water distribution plate before entering the floating oil salvage zone and being collected by the first and second oil lifting devices. A small amount of floating oil mixed with the mud and sand, as well as some floating oil that cannot be intercepted by the first and second oil separators, enters the floating oil scraping zone and is finally scraped into the oil outlet by the upper scraping device and then enters the oil collecting tank. The deoiled mud and sand sink to the bottom of the sludge propulsion device tank and are then pushed by the sludge propulsion device and enter the sludge lifting module through the connecting port. The sludge is then pushed into the sludge dewatering device by the sludge lifting device and then discharged after being dehydrated by the sludge dewatering device. After cleaning the mud and sand, the upper layer of mud is discharged into the slurry tank through the overflow pipe and discharged by the submersible pump. Through gravity sedimentation technology and aeration technology, the oil phase and solid phase are separated more efficiently. The foul odor generated during the entire operation is discharged and collected through the degassing pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a top view of the overall structure of the embodiment of the present application.

[0018] Figure 2 It is a front view of the overall structure of the embodiment of the present application.

[0019] Figure 3 This is a schematic structural diagram of an embodiment of the present application for illustrating an aeration device and a flow-stabilizing water distribution plate.

[0020] Figure 4 It is a schematic structural diagram of an oil scraping device used in an embodiment of the present application.

[0021] Figure 5 It is a structural diagram of the oil scraper.

[0022] Figure 6 It is a process flow chart of an embodiment of the present application.

[0023] Explanation of the accompanying symbols: 1. Equipment body; 2. Scraping and floating oil filtering module; 3. Sludge dehydration module; 4. Sludge lifting module; 5. Feed aeration area; 6. Floating oil salvage area; 7. Floating oil scraping area; 8. Degassing pipeline; 9. Sludge propulsion device; 10. Sludge lifting device; 11. Sludge dehydration device; 12. Arc bottom plate; 13. Aeration device; 14. Inclined baffle; 15. Flow stabilizing water distribution plate; 16. First oil separator; 17. Second oil separator; 18. First oil lifting device; 19. Second oil lifting device; 20. Mounting bucket; 21. Lower hopper; 22. Oil collecting tank; 23. Telescopic rod; 24. Telescopic cylinder; 26. Guide plate; 27. Rotating motor; 28. Chain; 29. ​​Scraping plate; 30. Rotating shaft; 31. Scraping belt; 32. Slurry tank; 33. Submersible pump. DETAILED DESCRIPTION

[0024] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification of this application and the appended claims, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context. It should also be understood that in the following embodiments of the present application, "at least one", "one or more" refer to one, two or more. The term "and / or" is used to describe the association relationship of associated objects, indicating that three relationships can exist; for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0025] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0026] The following is combined with Figure 1-6 This application is described in further detail.

[0027] Reference Figure 1 and Figure 2A device for reducing and cleaning oil-containing sludge comprises a device body 1, which comprises a scraping and floating oil filtering module 2, an oil sludge dehydration module 3 and an oil sludge lifting module 4 in sequence. A feed aeration area 5, an oil floating salvage area 6 and an oil floating scraping area 7 are arranged in sequence in the scraping and floating oil filtering module 2. The feed aeration area 5, the oil floating salvage area 6 and the oil floating scraping area 7 are connected at the bottom of the scraping and floating oil filtering module 2, and a degassing pipe 8 is connected to the side of the device body 1 for facilitating gas discharge and collection.

[0028] Reference Figure 1 and Figure 2 The scraping and floating oil filtering module 2 and the sludge lifting module 4 are located on the front and rear sides of the entire equipment, separated by a partition in the middle to form two independent chambers. The sludge propulsion device 9 is arranged horizontally, and the sludge lifting device 10 is arranged inclined. A connecting port is provided on the partition near the tail of the sludge propulsion device 9. The mud and sand after oil removal sink to the bottom of the trough body of the sludge propulsion device 9, and enter the sludge lifting module 4 through the connecting port, and are transferred to the sludge dehydration module 3 via the sludge lifting module 4. The sludge dehydration module 3 is provided with a sludge dehydration device 11, and the sludge is dehydrated by the sludge dehydration device 11.

[0029] Reference Figure 1 and Figure 2 The sludge propulsion device 9 and the sludge lifting device 10 both utilize spiral conveying blades, driven by a motor and reduction gears. A curved bottom plate 12 is fixed to the bottom of both the scraping and flotation filter module 2 and the sludge lifting module 4. This curved bottom plate 12 is coaxial with the rotating shaft of the spiral conveying blades, reducing the possibility of sludge accumulating in dead corners at the bottom and facilitating the forward movement of the sludge.

[0030] Reference Figure 1 and Figure 2 An aeration device 13 is provided in the feed aeration area 5, an oil lifting device is provided in the floating oil salvage area 6, and an oil scraping device is provided in the floating oil scraping area 7. An oil outlet is provided at the end of the oil scraping device. An inclined baffle 14 is integrally formed on one side of the arc-shaped bottom plate 12 located in the scraping and filtering module 2. The aeration device 13 is installed on the inclined baffle 14. When the aeration device 13 is working, light floating oil adheres to the surface of the bubbles, and the bubbles carry the floating oil to the surface of the liquid level. The bubbles carrying the floating oil are collected in turn by the oil lifting device and the oil scraping device.

[0031] Reference Figure 2 and Figure 3The scraping and floating oil filtering module 2 is fixed with a flow-stabilizing water distribution plate 15, a first oil separator 16 and a second oil separator 17 which are parallel to each other. The two sides of the flow-stabilizing water distribution plate 15 are respectively the feed aeration area 5 and the floating oil salvage area 6. The first oil separator 16 is located between the second oil separator 17 and the flow-stabilizing water distribution plate 15. The floating oil salvage area 6 is between the second oil separator 17 and the flow-stabilizing water distribution plate 15. The side of the second oil separator 17 away from the first oil separator 16 is the floating oil scraping area 7. The oil lifting device includes a first oil lifting device 18 arranged between the first oil separator 16 and the flow-stabilizing water distribution plate 15 and a second oil lifting device 19 arranged between the first oil separator 16 and the second oil separator 17.

[0032] Reference Figure 2 and Figure 3 The first oil lifting device 18 and the second oil lifting device 19 can both adopt steel belt oil scrapers. According to the actual oil content of the oil sludge, the number of oil separators in the floating oil salvage area 6 can be appropriately increased, and corresponding oil lifting devices can be set between adjacent oil separators.

[0033] Reference Figure 2 and Figure 4 The oil scraping device is tilted, and the equipment body 1 is rotatably connected to the mounting bucket 20 through a rotating shaft. The discharging end of the mounting bucket 20 is located at the oil outlet position, and a discharging hopper 21 is fixed to the discharging end of the mounting bucket 20. The discharging hopper 21 is tilted downward, and an oil collecting box 22 is installed below the discharging hopper 21. A telescopic rod 23 is fixed to the other end of the mounting bucket 20, and a vertically arranged telescopic cylinder 24 is fixed on the equipment body 1. A connecting block is fixed to the end of the connecting rod of the telescopic cylinder 24. One end of the telescopic rod 23 is connected to the mounting bucket 20, and the other end is rotatably connected to the connecting block. When the telescopic cylinder 24 works, it drives the connecting block to move up and down, thereby driving the mounting bucket 20 to rotate around the rotating shaft, which is used to adjust the inclination angle of the mounting bucket 20.

[0034] Reference Figure 2 and Figure 4 The oil scraping device also includes an oil scraping mechanism disposed within the mounting bucket 20 and used for feeding. The oil scraping mechanism includes two sets of sprockets rotatably connected to the mounting bucket 20. The same set of sprockets is located at both ends of the same side plate of the mounting bucket 20. A rotating motor 27 is fixed to the mounting bucket 20 to drive the sprockets. A chain 28 is provided on the sprockets, connected to the sprockets on the same side. A plurality of oil scraping plates 29 are fixed to the chain 28, connecting the two chains 28. The plurality of oil scraping plates 29 are arranged along the axial direction of the sprockets. A lower oil plate is fixed to the lower hopper 21, which scrapes floating oil on the oil scraping plates 29 into the lower hopper 21 and allows the floating oil to flow into the oil collecting tank 22.

[0035] Reference Figure 4 and Figure 5The scraper plate 29 has a diamond-shaped cross-section and is hollow inside. The four corners of the diamond are rotatably connected to the rotating shafts 30. A driving motor that drives one of the rotating shafts 30 to rotate is fixed on the scraper plate 29. An oil scraping belt 31 that surrounds the four rotating shafts 30 and the scraper plate 29 is provided on the rotating shaft 30. The surface of the oil scraping belt 31 is provided with rubber corrugations. Mounting blocks are fixed at the center positions of both ends of the scraper plate 29, and the mounting blocks are fixedly connected to the chain 28.

[0036] The diamond-shaped cross-section improves oil scraping stability and reduces liquid surface impact resistance. The diamond-shaped structure is symmetrical. When the liquid level fluctuates by ±10mm, the scraper plate 29 can still maintain an optimal scraping angle of approximately 60° (traditional flat plates are prone to reduced scraping efficiency due to angle changes), ensuring stable operation under all working conditions. The rotating shaft 30 and the scraper belt 31 realize "scraping-winding-guiding" integrated continuous dynamic oil scraping, improving efficiency by more than 50%. At the same time, the speed can be adjusted to adapt to the thickness of the oil layer by adjusting the drive motor speed (such as low speed 2rpm for thin oil layers, high speed 8rpm for thick oil layers), which can dynamically match different oil pollution scenarios:

[0037] When the oil layer thickness is greater than 5mm, the high-speed rotating belt can generate stronger suction force;

[0038] When the oil layer thickness is less than 1mm, low-speed rotation can avoid liquid surface disturbance and oil droplet dispersion.

[0039] Reference Figure 2 and Figure 3 The sludge dewatering device 11 adopts a mud separator. The sludge dewatering device 11 is arranged at the discharge end of the sludge lifting device 10. A slurry tank 32 is also provided in the equipment body 1. The slurry tank 32 is located below the sludge dewatering device 11. An overflow pipe is connected to the sludge lifting module. The overflow pipe is connected to the slurry tank 32. The upper mud after cleaning the mud and sand flows into the slurry tank 32 through the overflow pipe. A submersible pump 33 is installed inside the slurry tank 32 to facilitate the discharge of the slurry.

[0040] This application also discloses the use process of the above oily sludge reduction and cleaning equipment, referring to Figure 6 , including the following steps:

[0041] S1, oil sludge feeding, the oil sludge is broken up into oily sludge and then fed into the equipment body 1 through the feed port;

[0042] S2. Mud separation: After the oily sludge enters the equipment body 1, it first enters the feed aeration zone 5 of the oily sludge reduction and cleaning equipment. Under the action of the aeration device 13 below, the light oily sludge gradually floats up, and the floating oil in it adheres to the surface of the bubbles and rises to the surface of the liquid level, while the heavy oily bottom sludge sinks to the bottom of the propulsion device;

[0043] S3: The floating oil is lifted, and the floating oil is separated from the water below. The floating oil floats above the liquid surface and is enriched by the steady flow water distribution plate 15. It enters the upstream floating oil salvage area 6 and is collected by the first oil lifting device 18. The floating oil and light oily mud that are not intercepted by the first oil separator 16 will enter the downstream floating oil salvage area 6 and be further collected by the second oil lifting device 19.

[0044] S4, floating oil scraping. A small amount of floating oil mixed in the sediment and some floating oil that cannot be intercepted by the first oil separator 16 and the second oil separator 17 enter the floating oil scraping area 7, and finally is scraped into the oil outlet by the oil scraping device above and enters the oil collecting tank 22;

[0045] S5. Oily sludge treatment: The heavy oily sludge sinks to the bottom of the tank of the oily sludge propulsion device 9. Under the action of the oily sludge propulsion device 9, it passes through the first oil separator 16 and the second oil separator 17 and enters the oily sludge lifting module 4 through the connecting port. During the propulsion process of the oily sludge propulsion device 9, the oil in the oily sludge gradually floats up, continues to form oil sludge, and flows into the oil sludge lifting area. The oily sludge gradually forms clean mud, is pushed by the oily sludge lifting device 10, and enters the oily sludge dehydration device 11. It is then dehydrated by the oily sludge dehydration device 11 and discharged.

[0046] S6. Filtration and separation: After three-stage oil removal, the light oily mud and heavy oily bottom mud and the clean soil enter the oil mud lifting device 10 through the connecting port. The upper mud after cleaning the mud and sand is discharged into the slurry tank 32 through the overflow pipe and discharged by the submersible pump 33; the treated bottom mud is dehydrated by the dehydration and filtration device to form clean soil.

[0047] The foul-smelling gases generated during the entire working process are discharged and collected through the degassing pipe.

[0048] Equipment use effect:

[0049] Five oil sludge soil samples were collected from Yinchuan, China, and the equipment was used for pilot experiments. The results after treating the oil sludge are shown in Table 1.

[0050] Table 1 The sludge repair effect value after treatment by this equipment

[0051]

[0052] It can be seen from Table 1 that after being treated by this equipment, the petroleum hydrocarbons in the soil are effectively removed, achieving the effect of making the soil clean.

[0053] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. An oily sludge reduction and cleaning device, comprising a device body (1), characterized in that: The equipment body (1) comprises an oil scraping and filtering module (2), an oil sludge dehydration module (3) and an oil sludge lifting module (4) in sequence. The oil scraping and filtering module (2) is provided with a feed aeration zone (5), an oil floating salvage zone (6) and an oil floating scraping zone (7) in sequence. The feed aeration zone (5) is provided with an aeration device (13), the oil floating salvage zone (6) is provided with an oil lifting device, and the oil floating scraping zone (7) is provided with an oil scraping device. An oil outlet is provided at the end of the oil scraping device, and light oil floating adheres to the surface of the bubble. On the surface, bubbles carry floating oil and rise to the liquid level surface and are collected by the oil lifting device and the oil scraping device. The bottom of the scraping and filtering oil module (2) is provided with an oil sludge propulsion device (9). The oil sludge lifting module (4) is connected to the scraping and filtering oil module (2) near the tail of the oil sludge propulsion device (9). The interior of the oil sludge lifting module (4) is provided with an oil sludge lifting device (10). The oil sludge lifting device (10) is connected to the oil sludge dehydration module (3). The oil sludge dehydration module (3) is provided with an oil sludge dehydration device (11).

2. The oily sludge reduction and cleaning equipment according to claim 1, characterized in that: The oil sludge propulsion device (9) is arranged horizontally, the oil sludge lifting device (10) is arranged obliquely, and a communication port is provided on the scraping and flotation oil filtering module (2), and the oil sludge propulsion device (9) is connected to the oil sludge lifting device (10) through the communication port.

3. The oily sludge reduction and cleaning equipment according to claim 2, characterized in that: The scraping and floating oil filtering module (2) is internally fixed with a flow-stabilizing water distribution plate (15), a first oil separator (16) and a second oil separator (17) which are parallel to each other. The two sides of the flow-stabilizing water distribution plate (15) are respectively a feed aeration zone (5) and a floating oil salvage zone (6). The first oil separator (16) is located between the second oil separator (17) and the flow-stabilizing water distribution plate (15). The floating oil salvage zone (6) is located between the second oil separator (17) and the flow-stabilizing water distribution plate (15). The side of the second oil separator (17) away from the first oil separator (16) is a floating oil scraping zone (7). The oil lifting device comprises a first oil lifting device (18) arranged between the first oil separator (16) and the flow-stabilizing water distribution plate (15) and a second oil lifting device (19) arranged between the first oil separator (16) and the second oil separator (17).

4. The oily sludge reduction and cleaning equipment according to claim 3, characterized in that: The oil scraping device is arranged at an angle and comprises a mounting bucket (20). One end of the mounting bucket (20) close to the oil outlet is rotatably connected to the equipment body (1) via a rotating shaft. A telescopic rod (23) is fixed to the other end of the mounting bucket (20). A telescopic cylinder (24) is fixed to the equipment body (1). A connecting block is fixed to the end of the connecting rod of the telescopic cylinder (24). The telescopic rod (23) is rotatably connected to the connecting block and drives the mounting bucket (20) to rotate during the up and down movement. The oil scraping device also comprises an oil scraping mechanism arranged in the mounting bucket (20) and used for feeding.

5. The oily sludge reduction and cleaning equipment according to claim 4, characterized in that: The oil scraping mechanism comprises a sprocket rotatably connected to a mounting bucket (20); a rotating motor (27) for driving the sprocket to rotate is fixed on the mounting bucket (20); a chain (28) connected to the sprocket on the same side is provided on the sprocket; an oil scraping plate (29) connecting the two chains (28) is fixed on the chain (28); an oil collecting tank (22) is installed at the bottom of the oil outlet; and a lower oil plate for scraping the oil on the oil scraping plate (29) into the oil collecting tank (22) is fixed on the equipment body (1).

6. The oily sludge reduction and cleaning equipment according to claim 5, characterized in that: The cross section of the oil scraper (29) is rhombus-shaped, and the four corners of the rhombus are rotatably connected to rotating shafts (30). A driving motor for driving one of the rotating shafts (30) is fixed on the oil scraper (29), and an oil scraper belt (31) surrounding the four rotating shafts (30) is provided on the rotating shaft (30). Mounting blocks are fixed at the center positions of the two ends of the oil scraper (29), and the mounting blocks are fixedly connected to the chain (28).

7. The oily sludge reduction and cleaning equipment according to claim 1, characterized in that: The bottom of the scraping and floating oil filtering module (2) and the bottom of the sludge lifting module (4) are both fixed with an arc-shaped bottom plate (12), and the arc-shaped bottom plate (12) is coaxial with the rotating shaft of the sludge propulsion device (9) and the sludge lifting device (10). An inclined baffle (14) is fixed on one side of the arc-shaped bottom plate (12) located in the scraping and floating oil filtering module (2), and the aeration device (13) is installed on the inclined baffle (14).

8. The oily sludge reduction and cleaning equipment according to claim 1, characterized in that: A slurry tank (32) is further provided in the equipment body (1), and the slurry tank (32) is located below the oil sludge dewatering device (11). An overflow pipe is connected to the oil sludge lifting module (4), and the overflow pipe is in communication with the slurry tank (32) so as to allow the upper layer of mud after cleaning the mud and sand to flow into the slurry tank (32) through the overflow pipe. A submersible pump (33) is installed inside the slurry tank (32) to facilitate the discharge of the slurry.

9. The oily sludge reduction and cleaning equipment according to claim 1, characterized in that: The equipment body (1) is connected to a degassing pipeline (8) for facilitating gas discharge and collection.

10. The oily sludge reduction and cleaning equipment according to claim 1, characterized in that: The oil sludge dehydration device (11) is a mud separator; the first oil extraction device (18) and the second oil extraction device (19) are steel belt oil scrapers.

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