Oil-containing sludge reduction cleaning equipment

Abstract

The embodiment of the application provides a kind of oily sludge reduction cleaning equipment, it is related to oil exploitation, refining technical field, including equipment ontology, equipment ontology includes scraping floating oil filter module, oil sludge dehydration module and oil sludge lifting module, scraping floating oil filter module is provided with feed aeration zone, floating oil salvage area and floating oil scraping area in, aeration device is provided in feed aeration zone, oil extraction device is provided in floating oil salvage area, oil scraping device is provided in floating oil scraping area, the end of oil scraping device is provided with oil outlet, oil sludge propulsion device is provided in the bottom of scraping floating oil filter module, oil sludge lifting module is communicated with scraping floating oil filter module at the position of oil sludge propulsion device close to tail portion, the inside of the oil sludge lifting module is equipped with oil sludge lifting device, the oil sludge lifting device is connected with oil sludge dehydration module, and oil sludge dehydration device is provided in the oil sludge dehydration module.The application has the effect of cleaning, oil removal, degassing, dehydration.

Description

Technical Field

[0001] This invention relates to the field of petroleum extraction and refining technology, and in particular to a cleaning device for reducing the volume of oily sludge. Background Technology

[0002] Oily sludge is generated throughout the entire process of oil extraction and production. The large amount of petroleum hydrocarbons in the sludge are difficult to degrade, which has a great impact on soil and groundwater, and is a global environmental problem.

[0003] Oily sludge has a complex composition, mainly consisting of heavy oil composed of adhesive paper and asphalt, forming a multi-emulsion system with very stable properties. The water in oily sludge is primarily bound water, reaching up to 80% after mechanical dehydration. Due to its stable nature, the oil, water, and sludge phases are extremely difficult to separate, exacerbating the difficulty of oily sludge disposal. Large quantities of oily sludge are found in desert areas or areas with severe soil salinization. After being contaminated by crude oil, the activity of microorganisms in the soil is poor, making the oily sludge even more difficult to degrade. Limited by traditional remediation technologies, current oily sludge treatment equipment is characterized by large footprint, high cost, limited processing functions and poor treatment efficiency, low oil removal rates, and complex operation, failing to achieve integrated cleaning, oil removal, degassing, and dehydration. In conclusion, efficient and centralized oily sludge treatment equipment is an urgent solution to the oily sludge problem. Summary of the Invention

[0004] To address the aforementioned technical problems, this 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 solution: An oily sludge reduction and cleaning device includes a main body, which sequentially comprises a flotation and filtration module, an oily sludge dewatering module, and an oily sludge lifting module. The flotation and filtration module contains a feeding aeration zone, an oil dredging zone, and an oil skimming zone. The feeding aeration zone is equipped with an aeration device. The oil dredging zone is equipped with an oil lifting device. The oil skimming zone is equipped with an oil skimming device, with an oil outlet at its end. Light oil adheres to the surface of air bubbles, which carry the oil to the surface and are collected by the oil lifting and skimming devices. An oily sludge propulsion device is located at the bottom of the flotation and filtration module. The oily sludge lifting module is connected to the flotation and filtration module near the tail end of the propulsion device. An oily sludge lifting device is located inside the oily sludge lifting module and connected to the oily sludge dewatering module, which contains an oily sludge dewatering device.

[0006] Furthermore, the sludge propulsion device is arranged horizontally, the sludge lifting device is arranged at an angle, and the scraping and filtering oil module is provided with a connecting port, through which the sludge propulsion device and the sludge lifting device are connected.

[0007] Furthermore, the oil filtration module is internally fixed with parallel stabilizing water distribution plate, first oil separator plate and second oil separator plate. The two sides of the stabilizing water distribution plate are the feeding aeration zone and the floating oil retrieval zone, respectively. The first oil separator plate is located between the second oil separator plate and the stabilizing water distribution plate. The area between the second oil separator plate and the stabilizing water distribution plate is the floating oil retrieval zone. The side of the second oil separator plate away from the first oil separator plate is the floating oil skimming zone. The oil lifting device includes a first oil lifting device disposed between the first oil separator plate and the stabilizing water distribution plate and a second oil lifting device disposed between the first oil separator plate and the second oil separator plate.

[0008] Furthermore, the oil scraping device is inclined and includes a mounting hopper. One end of the mounting hopper near the oil outlet is rotatably connected to the equipment body via a rotating shaft. A telescopic rod is fixed to the other end of the mounting hopper. A telescopic cylinder is fixed to the equipment body. A connecting block is fixed to the end of the connecting rod of the telescopic cylinder. The telescopic rod is rotatably connected to the connecting block and drives the mounting hopper to rotate during its up-and-down movement. The oil scraping device also includes an oil scraping mechanism disposed inside the mounting hopper for feeding.

[0009] Furthermore, the oil scraping mechanism includes a sprocket rotatably connected inside the mounting hopper, a rotary motor for driving the sprocket to rotate is fixed on the mounting hopper, a chain connecting the sprocket on the same side is provided on the sprocket, an oil scraper plate connecting the two chains is fixed on the chain, an oil collection tank is installed at the bottom of the oil outlet, and a lower oil plate is fixed on the equipment body to scrape the oil on the oil scraper plate into the oil collection tank.

[0010] Furthermore, the scraper blade has a rhomboid cross-section, and rotating shafts are rotatably connected to the four corners of the rhomboid. A drive motor that drives one of the rotating shafts is fixed on the scraper blade. A scraper belt that surrounds the four rotating shafts is provided on the rotating shaft. Mounting blocks are fixed at the center of both ends of the scraper blade, and the mounting blocks are fixedly connected to the chain.

[0011] Furthermore, both the bottom of the scraping and filtering oil module and the bottom of the sludge lifting module are fixed with an arc-shaped base plate. The arc-shaped base plate is coaxial with the rotating shaft of the sludge propulsion device and the sludge lifting device. An inclined baffle is fixed on one side of the arc-shaped base plate inside the scraping and filtering oil module, and the aeration device is installed on the inclined baffle.

[0012] Furthermore, the equipment body is also equipped with a slurry tank, which is located below the sludge dewatering device. An overflow pipe is connected to the sludge lifting module, and the overflow pipe is connected to the slurry tank. The upper layer of sludge after washing the mud and sand flows into the slurry tank through the overflow pipe. A submersible pump is installed inside the slurry tank to facilitate slurry discharge.

[0013] Furthermore, the device body is connected to a degassing pipe to facilitate gas discharge and collection.

[0014] Furthermore, the sludge dewatering device is a sludge separator; the first oil lifting device and the second oil lifting device are steel belt scrapers.

[0015] In summary, this application includes at least one of the following beneficial technical effects: Oily sludge is fed into the equipment body through the feeding aeration zone. Under the action of the aeration device below, light floating oil adheres to the surface of the air bubbles. The air bubbles carry the floating oil to the surface layer, where the floating oil separates from the water below. The floating oil floats above the surface and, after being enriched by the flow stabilizing distribution plate, enters the floating oil retrieval zone, where it is collected by the first and second oil lifting devices. A small amount of floating oil mixed in with the sludge and some floating oil that the first and second oil separators fail to trap enter the floating oil skimming zone, and is finally scraped into the oil outlet by the upper skimming device before entering the oil collection tank. The de-oiled sludge sinks to the bottom of the sludge propulsion device tank, and is then pushed by the sludge propulsion device through the connecting port into the sludge lifting module. The sludge is then propelled by the sludge lifting device into the sludge dewatering device, and subsequently dewatered and discharged. After washing away the mud and sand, the upper layer of slurry is discharged into the slurry tank through the overflow pipe and then pumped out by a submersible pump. Gravity settling and aeration technologies are used to more efficiently separate the oil and solid phases. Odorous gases generated during the entire process are discharged and collected through a degassing pipe. Attached Figure Description

[0016] Figure 1 This is a top view of the overall structure of the embodiment of this application.

[0017] Figure 2 This is a front view of the overall structure of the embodiment of this application.

[0018] Figure 3 This is a schematic diagram illustrating the structure of the aeration device and the steady-flow water distribution plate in the embodiments of this application.

[0019] Figure 4 This is a schematic diagram of the structure of the oil scraping device according to an embodiment of this application.

[0020] Figure 5 This is a schematic diagram of the oil scraper.

[0021] Figure 6 This is a process flow diagram of an embodiment of this application.

[0022] Explanation of reference numerals in the attached drawings: 1. Equipment body; 2. Oil scraping and filtering module; 3. Oil sludge dewatering module; 4. Oil sludge lifting module; 5. Feeding and aeration zone; 6. Oil sludge removal zone; 7. Oil sludge scraping zone; 8. Deaeration pipe; 9. Oil sludge propulsion device; 10. Oil sludge lifting device; 11. Oil sludge dewatering device; 12. Arc-shaped bottom plate; 13. Aeration device; 14. Inclined baffle; 15. Flow stabilizing water distribution plate; 16. First oil separator plate; 17. Second oil separator plate; 18. First oil lifting device; 19. Second oil lifting device; 20. Installation hopper; 21. Discharge hopper; 22. Oil collection tank; 23. Telescopic rod; 24. Telescopic cylinder; 26. Guide plate; 27. Rotating motor; 28. Chain; 29. ​​Oil scraper plate; 30. Rotating shaft; 31. Oil scraper belt; 32. Slurry tank; 33. Submersible pump. Detailed Implementation

[0023] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of this application, “at least one” and “one or more” refer to one, two, or more than two. The term “and / or” is used to describe the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can indicate: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character “ / ” generally indicates that the preceding and following related objects are in an “or” relationship.

[0024] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of 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 "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0025] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0026] Reference Figure 1 and Figure 2A sludge reduction and cleaning device for oily sludge includes a device body 1. The device body 1 includes, in sequence, a scraping and filtering oil module 2, an oily sludge dewatering module 3, and an oily sludge lifting module 4. The scraping and filtering oil module 2 is provided with a feeding aeration zone 5, an oil dredging zone 6, and an oil skimming zone 7. The feeding aeration zone 5, the oil dredging zone 6, and the oil skimming zone 7 are connected at the bottom of the scraping and filtering oil module 2. A degassing pipe 8 is connected to the side of the device body 1 to facilitate gas discharge and collection.

[0027] Reference Figure 1 and Figure 2 The oil scraping and filtering module 2 and the sludge lifting module 4 are located on the front and rear sides of the overall equipment, separated by a partition to form two independent chambers. The sludge pushing device 9 is arranged horizontally, and the sludge lifting device 10 is arranged at an angle. A connecting port is provided on the partition near the tail of the sludge pushing device 9. The sludge and sand after oil removal sink to the bottom of the tank of the sludge pushing device 9 and enter the sludge lifting module 4 through the connecting port. Then, the sludge is transferred to the sludge dewatering module 3 through the sludge lifting module 4. The sludge dewatering module 3 is equipped with a sludge dewatering device 11, which dewaters the sludge.

[0028] Reference Figure 1 and Figure 2 Both the sludge propulsion device 9 and the sludge lifting device 10 employ spiral conveying blades and are driven and conveyed through the cooperation of a motor and a reduction gear. An arc-shaped base plate 12 is fixed at the bottom of both the scraping and filtering oil module 2 and the sludge lifting module 4. The arc-shaped base plate 12 is coaxial with the rotating shaft of the spiral conveying blades, reducing the possibility of sludge accumulating in the dead corners at the bottom and facilitating the forward movement of the sludge.

[0029] Reference Figure 1 and Figure 2 An aeration device 13 is installed in the feeding aeration zone 5, an oil lifting device is installed in the floating oil scooping zone 6, and an oil scraping device is installed in the floating oil skimming zone 7. The end of the oil scraping device has an oil outlet. An inclined baffle 14 is integrally formed on one side of the arc-shaped bottom plate 12 located in the oil skimming 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. The bubbles carry the floating oil to the surface of the liquid level. The bubbles carrying the floating oil are collected in sequence by the oil lifting device and the oil scraping device.

[0030] Reference Figure 2 and Figure 3The oil skimming and filtering module 2 has a parallel water distribution plate 15, a first oil separator 16, and a second oil separator 17 fixed inside. The two sides of the water distribution plate 15 are the feeding aeration zone 5 and the floating oil scooping zone 6, respectively. The first oil separator 16 is located between the second oil separator 17 and the water distribution plate 15. The floating oil scooping zone 6 is located between the second oil separator 17 and the water distribution plate 15. The side of the second oil separator 17 away from the first oil separator 16 is the floating oil skimming zone 7. The oil lifting device includes a first oil lifting device 18 set between the first oil separator 16 and the water distribution plate 15 and a second oil lifting device 19 set between the first oil separator 16 and the second oil separator 17.

[0031] Reference Figure 2 and Figure 3 Both the first oil lifting device 18 and the second oil lifting device 19 can be steel belt scrapers. Depending on the actual oil content of the oil sludge, the number of oil separators in the floating oil dredging area 6 can be appropriately increased, and corresponding oil lifting devices can be set between adjacent oil separators.

[0032] Reference Figure 2 and Figure 4 The oil scraping device is set at an angle. An installation bucket 20 is rotatably connected to the main body 1 via a rotating shaft. The discharge end of the installation bucket 20 is located at the oil outlet position, and a discharge bucket 21 is fixed to the discharge end of the installation bucket 20. The discharge bucket 21 is tilted downward, and an oil collection tank 22 is installed below the discharge bucket 21. A telescopic rod 23 is fixed to the other end of the installation bucket 20. A vertically set telescopic cylinder 24 is fixed to the main 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 installation 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 installation bucket 20 to rotate around the rotating shaft, which is used to adjust the tilt angle of the installation bucket 20.

[0033] Reference Figure 2 and Figure 4 The oil scraping device also includes an oil scraping mechanism disposed within the mounting hopper 20 for feeding. The oil scraping mechanism includes two sets of sprockets rotatably connected within the mounting hopper 20. The same set of sprockets is located at both ends of the same side plate of the mounting hopper 20. A rotary motor 27 for driving the sprockets is fixed on the mounting hopper 20. A chain 28 is provided on the sprockets to connect the sprockets on the same side. Several oil scraping plates 29 connecting the two chains 28 are fixed on the chain 28. The several oil scraping plates 29 are arranged along the axial direction of the sprockets. An oil discharge plate is fixed on the discharge hopper 21 to scrape the floating oil on the oil scraping plates 29 into the discharge hopper 21 and allow the floating oil to flow into the oil collection tank 22.

[0034] Reference Figure 4 and Figure 5The scraper blade 29 has a rhomboid cross-section and is hollow inside. Rotating shafts 30 are rotatably connected to the four corners of the rhomboid. A drive motor that drives one of the rotating shafts 30 is fixed on the scraper blade 29. A scraper belt 31 is provided on the rotating shaft 30 to surround the four rotating shafts 30 and the scraper blade 29. The surface of the scraper belt 31 is provided with rubber corrugations. Mounting blocks are fixed at the center positions of both ends of the scraper blade 29. The mounting blocks are fixedly connected to the chain 28.

[0035] The rhomboid cross-section enhances oil scraping stability and reduces surface impact resistance. The symmetrical structure ensures that even with a liquid level fluctuation of ±10mm, the scraper blade 29 maintains an optimal scraping angle of approximately 60° (unlike traditional flat blades where angle changes easily lead to decreased scraping efficiency), guaranteeing stable operation under all conditions. The rotating shaft 30 and scraper belt 31 achieve integrated continuous dynamic oil scraping, improving efficiency by over 50%. Simultaneously, the adjustable speed adapts to oil layer thickness by adjusting the drive motor speed (e.g., low speed 2rpm for thin oil layers, high speed 8rpm for thick oil layers), dynamically matching different oil contamination scenarios. When the oil layer thickness is greater than 5mm, the high-speed rotating belt can generate stronger suction force. When the oil layer thickness is less than 1 mm, low-speed rotation can avoid surface disturbance that could cause oil droplet dispersion.

[0036] Reference Figure 2 and Figure 3 The sludge dewatering device 11 adopts a sludge separator. The sludge dewatering device 11 is set at the discharge end of the sludge lifting device 10. The main body of the equipment 1 is also equipped with a slurry tank 32, which 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 layer of sludge after washing 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 slurry.

[0037] This application also discloses the operating process of the aforementioned oily sludge reduction and cleaning equipment, referring to... Figure 6 This includes the following steps: S1. Oil sludge feeding: The oil sludge is broken into an oily slurry and then fed into the equipment body 1 through the feed inlet. S2. Sludge separation: After the oily sludge enters the main body 1 of the equipment, it first enters the feeding 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 to the surface, and the floating oil in it adheres to the surface of the air bubbles and rises to the liquid level, while the heavy oily bottom sludge sinks to the bottom of the propulsion device. S3. Oil slick is lifted. The oil slick separates from the water below. The oil slick floats on the surface and is enriched by the flow stabilizing plate 15 before entering the upstream oil slick retrieval area 6, where it is collected by the first oil lifting device 18. The oil slick and light oily sludge that the first oil separator 16 fails to trap will enter the downstream oil slick retrieval area 6 and be collected by the second oil lifting device 19. S4. Floating oil scraping and filtering: A small amount of floating oil mixed in the mud and sand, as well as some floating oil that the first oil separator 16 and the second oil separator 17 failed to intercept, enter the floating oil scraping area 7, and finally are scraped into the oil outlet by the scraping device above and enter the oil collection tank 22. S5. Oily bottom mud treatment: Heavy oily bottom mud sinks to the bottom of the tank of oily mud propulsion device 9. Under the propulsion of oily mud propulsion device 9, it passes through the first oil-separating plate 16 and the second oil-separating plate 17 and enters the oily mud lifting module 4 through the connecting port. During the propulsion process of oily mud propulsion device 9, the oily substances in the oily bottom mud gradually float to the surface and continue to form floating oil, which flows into the floating oil lifting area. The oily bottom mud gradually forms clean mud, which is propulsed by oily mud lifting device 10 and enters oily mud dewatering device 11. After being dewatered by oily mud dewatering device 11, it is discharged. S6. Filtration and separation: Light oily mud and heavy oily bottom mud are de-oiled in three stages and then enter the oily mud lifting device 10 through the connecting port along with clean soil. The upper mud after washing 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 slurry is de-watered by the dewatering and filtration device to form clean soil.

[0038] Odor-causing gases generated during the entire operation are discharged and collected through the degassing pipe.

[0039] Equipment performance: Five oil sludge soil samples were collected from Yinchuan, China, and used in a pilot-scale experiment with this equipment. The results of the oil sludge treatment are shown in Table 1.

[0040] Table 1. Oil sludge repair effect values ​​after treatment with this equipment

[0041] As can be seen from Table 1, after treatment by this equipment, petroleum hydrocarbons in the soil are effectively removed, achieving the effect of making the soil cleaner.

[0042] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or variations made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A cleaning device for reducing the volume of oily sludge, comprising a device body (1), characterized in that: The main body of the equipment (1) includes, in sequence, a scraping and filtering oil module (2), an oil sludge dewatering module (3), and an oil sludge lifting module (4). The scraping and filtering oil module (2) is provided with a feeding aeration zone (5), an oil dredging zone (6), and an oil skimming zone (7). An aeration device (13) is provided in the feeding aeration zone (5), an oil lifting device is provided in the oil dredging zone (6), and an oil skimming device is provided in the oil skimming zone (7). An oil outlet is provided at the end of the oil skimming device, and light oil adheres to the surface of the bubbles. On the surface, bubbles carrying floating oil rise to the liquid level and are collected by the oil lifting device and the oil scraping device. The bottom of the oil scraping and filtering module (2) is provided with an oil sludge propulsion device (9). The oil sludge lifting module (4) is connected to the oil scraping and filtering module (2) near the tail of the oil sludge propulsion device (9). The oil sludge lifting module (4) is provided with an oil sludge lifting device (10) inside. The oil sludge lifting device (10) is connected to the oil sludge dewatering module (3). The oil sludge dewatering module (3) is provided with an oil sludge dewatering device (11). The sludge propulsion device (9) is arranged horizontally, the sludge lifting device (10) is arranged at an angle, the scraping and filtering oil module (2) is provided with a communication port, and the sludge propulsion device (9) and the sludge lifting device (10) are connected through the communication port. The oil scraping and filtering module (2) is internally fixed with a parallel flow stabilizing water distribution plate (15), a first oil separator (16), and a second oil separator (17). The two sides of the flow stabilizing water distribution plate (15) are the feeding aeration zone (5) and the floating oil scooping zone (6), respectively. The first oil separator (16) is located between the second oil separator (17) and the flow stabilizing water distribution plate (15). The area between the second oil separator (17) and the flow stabilizing water distribution plate (15) is the floating oil scooping zone (6). The side of the second oil separator (17) away from the first oil separator (16) is the floating oil scraping zone (7). The oil scraping device is inclined and includes a mounting bucket (20). The end of the mounting bucket (20) near the oil outlet is rotatably connected to the equipment body (1) via a rotating shaft. The other end of the mounting bucket (20) is fixed with a telescopic rod (23). A telescopic cylinder (24) is fixed on the equipment body (1). A connecting block is fixed at 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.

2. The oily sludge reduction and cleaning equipment according to claim 1, characterized in that: The oil extraction device includes a first oil extraction device (18) disposed between the first oil separator (16) and the steady flow distribution plate (15) and a second oil extraction device (19) disposed between the first oil separator (16) and the second oil separator (17).

3. The oily sludge reduction and cleaning equipment according to claim 2, characterized in that: The oil scraping device also includes an oil scraping mechanism disposed in the mounting hopper (20) for feeding.

4. The oily sludge reduction and cleaning equipment according to claim 3, characterized in that: The oil scraping mechanism includes a sprocket rotatably connected in the 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 scraper (29) connecting the two chains (28) is fixed on the chain (28), an oil collection tank (22) is installed at the bottom of the oil outlet, and a lower oil plate is fixed on the equipment body (1) to scrape the oil on the oil scraper (29) into the oil collection tank (22).

5. The oily sludge reduction and cleaning equipment according to claim 4, characterized in that: The scraper blade (29) has a rhomboid cross-section, and rotating shafts (30) are rotatably connected to the four corners of the rhomboid. A drive motor that drives one of the rotating shafts (30) is fixed on the scraper blade (29). A scraper belt (31) that surrounds the four rotating shafts (30) is provided on the rotating shaft (30). Mounting blocks are fixed at the center of both ends of the scraper blade (29), and the mounting blocks are fixedly connected to the chain (28).

6. The oily sludge reduction and cleaning equipment according to claim 1, characterized in that: The bottom of the scraping and filtering oil module (2) and the bottom of the sludge lifting module (4) are both fixed with an arc-shaped bottom plate (12). 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) inside the scraping and filtering oil module (2). The aeration device (13) is installed on the inclined baffle (14).

7. The oily sludge reduction and cleaning equipment according to claim 1, characterized in that: The equipment body (1) is also equipped with a slurry tank (32), which is located below the sludge dewatering device (11). The sludge lifting module (4) is connected to an overflow pipe, which is connected to the slurry tank (32). The upper layer of sludge after washing the mud and sand flows into the slurry tank (32) through the overflow pipe. The slurry tank (32) is equipped with a submersible pump (33) to facilitate slurry discharge.

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

9. The oily sludge reduction and cleaning equipment according to claim 2, characterized in that: The sludge dewatering device (11) is a sludge separator; the first oil extraction device (18) and the second oil extraction device (19) are steel belt scrapers.

Images