An oil exploitation sludge treatment device

Abstract

The application discloses a kind of petroleum exploitation sludge treatment device, it is related to petroleum exploitation technical field, including device base;The top of device base is symmetrically provided with first motor, the output end of first motor is fixedly connected with gear, the outer wall of gear is engaged with ring gear.This application is uniformly rotated under the action of the cylinder being set, mud cake is entered into inner shell by feed inlet, after being smeared on the inner wall of inner shell by arc plate, electric push rod pushes support plate radial displacement, and then support shaft displacement is caused, at this time, the top of scraper is attached to the inner wall of inner shell, the spacing between arc plate and inner shell increases, and the dried sludge is scraped off using scraper, arc plate is arranged in arc shape, and the profile of inner shell inner wall is matched, to ensure the uniformity of coating, to avoid material accumulation from the source, during heating process, water, petroleum hydrocarbon substance in sludge gradually evaporates, gasifies and is discharged with exhaust pipe.

Description

Technical Field

[0001] This invention relates to the field of oil extraction technology, and more specifically to an oil extraction sludge treatment device. Background Technology

[0002] Oil extraction is the process of extracting oil and natural gas from underground reservoirs, including exploration, drilling, and production. Its core relies on the flow of oil and gas in the reservoir and artificial driving technology. Oil is a mixture of hydrocarbon compounds, which requires obtaining rock formation information through well logging engineering and combining drilling fluid circulation systems and other technologies for extraction. The mixture is transported after being processed by oil and gas gathering and transportation engineering. Oil sludge treatment is the process of harmlessly disposing of and resource-utilizing oily sludge generated during oil extraction, refining, storage and transportation.

[0003] Currently, in the pyrolysis treatment of oily sludge, the sludge is heated in an oxygen-deficient environment. During the temperature rise, gaseous or semi-gaseous organic matter is desorbed and separated from the sludge. These substances are then discharged to the downstream oil and gas recovery and separation devices, where petroleum hydrocarbons can be recovered. Therefore, the heating efficiency of the sludge and the emission efficiency of the heated gas and semi-gaseous substances are crucial in the pyrolysis process. Improving the heating efficiency of the sludge can reduce the pyrolysis time and energy consumption while ensuring sufficient pyrolysis. The dispersion and emission of gas and semi-gaseous substances can promote heat conduction in the sludge and enhance the separation and collection of petroleum hydrocarbons in the gas.

[0004] Chinese patent literature discloses a harmless treatment device and method for oil extraction sludge (publication number CN116986781B), including a rotary kiln body for pyrolysis of the sludge. A cylinder is rotatably installed inside the rotary kiln body, and the cylinder is made of a high thermal conductivity material. However, the following defects still exist in its implementation:

[0005] While the apparatus described in the aforementioned literature can enhance the overall height of the sludge within the cylinder as it rotates with the cylinder, thereby increasing the contact efficiency between the sludge and the inner wall of the cylinder, and further enhance the contact efficiency by restricting the sludge flow through the distribution channels, the sludge tends to adhere tightly to the inner wall of the cylinder after processing. However, after processing, the viscous sludge tends to adhere to the inner wall, forming a hard coking layer that is extremely difficult to clean. This not only affects the processing efficiency of subsequent batches but may also damage the equipment. Furthermore, due to the poor thermal conductivity of the sludge, the heat transfer efficiency is low, resulting in long drying or pyrolysis times and high energy consumption, thus reducing the overall efficiency of sludge treatment. Summary of the Invention

[0006] The purpose of this invention is to provide an oil extraction sludge treatment device to solve the problem of low sludge treatment efficiency mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0008] A device for treating sludge from oil extraction includes a base. A first motor is symmetrically arranged on the top of the base. A gear is fixedly connected to the output end of the first motor. A gear ring is meshed with the outer wall of the gear. A cylinder is fixedly connected to the inner wall of the gear ring. A support wheel is fixedly connected to the top of the base. The inner wall of the support wheel fits against the cylinder. Two feed inlets are fixedly connected to the outer wall of the cylinder. An exhaust pipe is fixedly connected to one end of the cylinder. An inner shell is fixedly connected to the inner wall of the cylinder. A second motor is fixedly connected to one end of the cylinder. A drive shaft is fixedly connected to the output end of the second motor. A support shaft is sleeved on the outer wall of the drive shaft. A scraper is fixedly connected to the outer wall of the support shaft. A connecting plate is fixedly connected to the side of the support shaft away from the scraper. An arc-shaped plate is hinged to one side of the connecting plate. An outer shell is symmetrically fixedly connected to the top of the base. Electric push rods are fixedly connected to the inner walls of the outer shells. A support plate is fixedly connected to the top of each electric push rod. The top of the support plate is fixedly connected to both ends of the support shaft. The two sides of the support plate are slidably connected to the outer shell.

[0009] The above technical solution has an interlayer between the inner shell and the cylinder. Therefore, the hot air generated by the external heat source is blown into this interlayer. The hot air flows in the interlayer and indirectly transfers heat to the thin layer of sludge coated on the inner wall of the inner shell through the wall surface. This effectively avoids local overheating that would cause the sludge to coke and carbonize rapidly and produce harmful substances. At the same time, it increases the overall heat exchange area, improves thermal efficiency, and reduces energy consumption.

[0010] A further improvement of the technical solution of the present invention is that the scrapers are distributed in a linear array, and multiple scrapers are arranged in an L-shape, with the top of the scrapers fitting against the inner wall of the inner shell.

[0011] Using the above technical solution, multiple L-shaped scrapers are distributed along the axial direction, with their tops closely attached to the inner wall of the inner shell. During rotation, each scraper is responsible for scraping off a section of sludge in an annular area. The combined action of multiple scrapers divides the sludge on the entire inner wall into several layers and scrapes them off in sequence. The sludge that falls off is small in volume and easier to break, avoiding excessive resistance on a single scraper and making scraping easier.

[0012] A further improvement of the technical solution of the present invention is that: a spiral groove is provided on the outer wall of the drive shaft, and a protrusion that matches the shape and contour of the spiral groove is fixedly connected to the inner wall of the support shaft, and the protrusion and the spiral groove are slidably connected.

[0013] Using the above technical solution, when the second motor rotates, the protrusions on the inner wall of the support shaft slide in the spiral groove, thereby pushing the support shaft to move along the axial direction of the drive shaft, which in turn causes the scraper to shift laterally. At this time, the residual sludge that was not scraped off in the first instance can be scraped off.

[0014] A further improvement of the technical solution of the present invention is that a weakening groove is provided on one side of each of the multiple scrapers, and the weakening groove is elliptical in shape.

[0015] By adopting the above technical solution, the weakening groove changes the local stiffness distribution of the scraper. When the scraper contacts the inner wall of the inner shell and is subjected to radial extrusion force, the area where the weakening groove is located will preferentially produce a small elastic deformation, so that the top edge of the scraper can better adapt to the small unevenness or curvature deviation that may exist on the inner wall of the inner shell.

[0016] A further improvement of the technical solution of the present invention is that: a limiting plate is symmetrically fixedly connected to one side of the scraper, and a second spring is fixedly connected to the inner sidewall of each of the two limiting plates; a round cover is rotatably connected to the side of the scraper near the limiting plate, and a vertical rod is rotatably connected to the side of the scraper near the round cover; the side of the second spring away from the limiting plate is fixedly connected to the vertical rod, and the round cover and the vertical rod are fixedly connected.

[0017] In the above technical solution, the round cover and the upright are integrated as a whole. Under the action of the second spring, they are vertically positioned on the side of the scraper. After the sludge coating is completed, the upright divides the sludge surface to allow the gas to be discharged more quickly.

[0018] A further improvement of the technical solution of the present invention is that the top of the upright is set in an arc shape, and the thickness of the upright is 3-8 mm.

[0019] The above technical solution uses a pole with a thickness of 3-8 mm, which creates gaps on the sludge surface, making it easier for the scraper to remove the sludge and further reducing the resistance encountered during the scraping process.

[0020] A further improvement of the technical solution of the present invention is that the arc-shaped plate is inclined and the top of the arc-shaped plate is bent inward.

[0021] Using the above technical solution, the inclined arc-shaped plate forms an angle with the inner wall of the inner shell, making the sludge thinner and more evenly distributed during the coating process.

[0022] A further improvement of the technical solution of the present invention is that: a vibration generator is fixedly connected to the top of the arc-shaped plate, columns are symmetrically installed on the top of the arc-shaped plate, a first spring is fixedly connected to the top of each column, the first spring is fixedly connected to the top of the inner wall of the connecting plate, limit rods are symmetrically fixedly connected to both sides of the connecting plate, waist-shaped grooves are opened on both sides of the inner wall of the arc-shaped plate, rubber pads are provided on the inner wall of the waist-shaped grooves, and the limit rods and waist-shaped grooves are slidably connected.

[0023] The above technical solution forms a closed cavity with the arc plate and the connecting plate. The cavity is equipped with a vibration generator and a first spring. When vibration is generated, it effectively breaks the adhesion between the sludge and the arc plate, preventing the sludge from accumulating on the surface of the arc plate. At the same time, it assists in the subsequent crushing process. The limiting rod slides in the waist groove, which limits the swing range of the arc plate, so that it can maintain its elasticity without overturning.

[0024] A further improvement of the technical solution of the present invention is that: cavities are provided at both ends of the cylinder, and a sliding plate is sleeved on the outer wall of the support shaft, and the sliding plate and the cavity are slidably connected.

[0025] With the above technical solution, when the support shaft is displaced, the sliding plate moves upward or downward simultaneously, ensuring the sealing of the cylinder and effectively preventing the leakage of sludge, oil, gas and other media from the gap between the support shaft and the cylinder, while not hindering the movement of the support shaft.

[0026] A further improvement of the technical solution of the present invention is that: a sealing block is slidably connected to the inner wall of the feed inlet, a limiting block is fixedly connected to the outer wall of the sealing block, a groove adapted to the shape and contour of the limiting block is opened on the inner wall of the feed inlet, a sealing cover is rotatably connected to the top of the sealing block, and the bottom of the sealing block has the same shape and contour as the inner shell.

[0027] The above technical solution requires rotating and pulling up the sealing cover when feeding to separate the sealing cover from the feed inlet, allowing the sealing block to detach from the feed inlet. After feeding is completed, it is pushed down along the chute. The bottom contour of the sealing block matches the inner wall of the inner shell, forming a smooth inner wall, which avoids protrusions or depressions at the bottom of the feed inlet, affecting the scraper's passage and cleaning effect.

[0028] Due to the adoption of the above technical solution, the technical progress achieved by this invention compared to the prior art is as follows:

[0029] 1. This invention provides an oil extraction sludge treatment device. A cylindrical body rotates at a constant speed under the action of a support wheel, a first motor, gears, and a gear ring. Sludge cake enters the inner shell through the feed inlet. After being coated onto the inner wall of the inner shell by an arc-shaped plate, an electric push rod pushes the support plate radially, thereby displacing the support shaft. At this time, the top of the scraper is in contact with the inner wall of the inner shell, increasing the distance between the arc-shaped plate and the inner shell. The scraper then scrapes off the dried sludge. The arc-shaped plate is designed to match the contour of the inner wall of the inner shell, ensuring uniform coating and preventing material accumulation at the source. During the heating process, the moisture and petroleum hydrocarbons in the sludge gradually evaporate and vaporize, and are discharged through the exhaust pipe.

[0030] 2. This invention provides an oil extraction sludge treatment device, which uses multiple L-shaped scrapers distributed axially, with their tops tightly fitted to the inner wall of the inner shell. During rotation, each scraper is responsible for scraping off a section of sludge in an annular area. The multiple scrapers work together to divide the sludge on the entire inner wall into several layers and scrape them off sequentially. The sludge that falls off is small in volume and easier to break, avoiding excessive resistance on a single scraper, making scraping easier. The L-shaped design ensures that its edges always effectively fit the inner wall, guaranteeing the scraping effect.

[0031] 3. This invention provides an oil extraction sludge treatment device. By setting the thickness of the uprights to 3-8 mm, gaps are created on the sludge surface. These gaps not only provide additional escape channels for the evaporation of moisture inside the sludge, but also accelerate the transfer of heat to the deeper layers of the sludge, thereby shortening the drying cycle. After the sludge is coated on the inner wall of the inner shell, the uprights rotate synchronously with the cylinder under the drive of the support shaft. The arc-shaped top of the uprights will carve continuous, evenly spaced shallow grooves on the sludge surface. These shallow grooves are distributed on the sludge layer surface like capillaries, effectively breaking the dense hard shell formed on the sludge surface due to rapid heating, and preventing the hard shell from hindering the evaporation of internal moisture and oil.

[0032] 4. This invention provides an oil extraction sludge treatment device. An arc-shaped plate and a connecting plate form a sealed cavity, within which a vibration generator and a first spring are installed. When vibration is generated, the adhesion between the sludge and the arc-shaped plate is effectively broken, preventing sludge accumulation on the arc-shaped plate surface. Simultaneously, it assists in subsequent crushing processing. A limiting rod slides within a waist-shaped groove, limiting the swing range of the arc-shaped plate, ensuring it remains elastic without excessive overturning. The arc-shaped plate forms an angle with the inner wall of the inner shell, resulting in a thinner and more uniform sludge coating during application. Furthermore, the top of the arc-shaped plate bends inward, preventing sludge accumulation on its top during rotation and ensuring adequate treatment of some sludge, further enhancing the sludge's adherence to the inner wall of the inner shell.

[0033] 5. This invention provides an oil extraction sludge treatment device. The sealing block can slide inside the feed inlet. When feeding is required, the sealing cover is rotated and pulled up to separate the sealing cover from the feed inlet, allowing the sealing block to detach from the feed inlet. After feeding is completed, it is pushed down along the chute. The bottom contour of the sealing block matches the inner wall of the inner shell, forming a smooth inner wall, which avoids protrusions or depressions at the bottom of the feed inlet, affecting the passage of the scraper and the cleaning effect. Attached Figure Description

[0034] The invention will now be further described with reference to the accompanying drawings.

[0035] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 This is a schematic diagram of the internal structure of the cylinder in this invention;

[0037] Figure 3 This is a three-dimensional structural diagram of the electric actuator and support shaft in this invention.

[0038] Figure 4 This is a schematic diagram of the three-dimensional structure of the inner shell, scraper, and arc plate in this invention.

[0039] Figure 5 This is a three-dimensional structural diagram of the cooperation between the support shaft and the drive shaft in this invention;

[0040] Figure 6 This is a schematic diagram of the three-dimensional structure of the first spring and the arc-shaped plate in this invention;

[0041] Figure 7 This is a schematic diagram of the three-dimensional structure of the connecting plate and the arc plate in this invention;

[0042] Figure 8 This is a schematic diagram of the overall structure of the scraper in this invention;

[0043] Figure 9 This is a schematic diagram of the internal structure of the round cover in this invention;

[0044] Figure 10 This is a three-dimensional structural diagram of the cooperation between the sliding plate and the cylinder in this invention;

[0045] Figure 11 This is a three-dimensional structural diagram of the combination of the sealing cap and the feed inlet in this invention.

[0046] In the diagram: 1. Device base; 2. Cylinder; 3. Feed inlet; 4. Exhaust pipe; 5. Outer shell; 6. Support wheel; 7. First motor; 8. Gear; 9. Gear ring; 10. Second motor; 11. Inner shell; 12. Sealing cover; 13. Sealing block; 14. Support shaft; 15. Connecting plate; 16. Scraper; 17. Weakening groove; 18. Round cover; 19. Upright pole; 20. Arc plate; 21. Electric push rod; 22. Support plate; 23. Drive shaft; 24. Spiral groove; 25. Vibration generator; 26. Column; 27. First spring; 28. Limiting rod; 29. ​​Waist-shaped groove; 30. Limiting plate; 31. Second spring; 32. Sliding plate; 33. Limiting block. Detailed Implementation

[0047] The present invention will be further described in detail below with reference to the embodiments.

[0048] Example 1

[0049] like Figure 1 and Figure 2 As shown, the present invention provides an oil extraction sludge treatment device, including a device base 1; a first motor 7 is symmetrically arranged on the top of the device base 1, a gear 8 is fixedly connected to the output end of the first motor 7, a gear ring 9 is meshed with the outer wall of the gear 8, a cylinder 2 is fixedly connected to the inner wall of the gear ring 9, a support wheel 6 is fixedly connected to the top of the device base 1, the inner side wall of the support wheel 6 is in contact with the cylinder 2, two feed inlets 3 are fixedly connected to the outer wall of the cylinder 2, an exhaust pipe 4 is fixedly connected to one end of the cylinder 2, an inner shell 11 is fixedly connected to the inner wall of the cylinder 2, and a second motor 1 is fixedly connected to one end of the cylinder 2. 0. The output end of the second motor 10 is fixedly connected to a drive shaft 23. A support shaft 14 is sleeved on the outer wall of the drive shaft 23. A scraper 16 is fixedly connected to the outer wall of the support shaft 14. A connecting plate 15 is fixedly connected to the side of the support shaft 14 away from the scraper 16. An arc plate 20 is hinged to one side of the connecting plate 15. A housing 5 is symmetrically fixedly connected to the top of the device base 1. An electric push rod 21 is fixedly connected to the inner side wall of the housing 5. A support plate 22 is fixedly connected to the top of the electric push rod 21. The top of the support plate 22 is fixedly connected to both ends of the support shaft 14. The two sides of the support plate 22 are slidably connected to the housing 5.

[0050] In this embodiment, the solid sludge cake after pressure filtration is coated onto the inner wall of the inner shell 11 by the arc-shaped plate 20. Since there is a sandwich between the inner shell 11 and the cylinder 2, the hot air generated by the external heat source is blown into this sandwich. The hot air flows in the sandwich and indirectly transfers heat to the thin layer of sludge coated on the inner wall of the inner shell 11 through the wall surface of the inner shell 11. This effectively avoids local overheating that causes the sludge to coke and carbonize rapidly and produce harmful substances. At the same time, it increases the overall heat exchange area, improves thermal efficiency, reduces energy consumption, and prevents the cylinder 2 from being baked at high temperature, ensuring the long-term stable operation of the gear 8, gear ring 9 and support wheel 6.

[0051] During use, the cylinder 2 rotates at a constant speed under the action of the support wheel 6, the first motor 7, the gear 8, and the gear ring 9. The mud cake enters the inner shell 11 through the feed port 3 and is coated on the inner wall of the inner shell 11 by the arc plate 20. At this time, the scraper 16 and the arc plate 20 are in a vertical position. The electric push rod 21 pushes the support plate 22 to move radially, thereby causing the support shaft 14 to move. At this time, the top of the scraper 16 is in contact with the inner wall of the inner shell 11, and the distance between the arc plate 20 and the inner shell 11 increases. The dried sludge is scraped off by the scraper 16. The arc plate 20 is set in an arc shape and matches the contour of the inner wall of the inner shell 11, ensuring the uniformity of coating and avoiding material accumulation from the source. During the heating process, the water and petroleum hydrocarbons in the sludge gradually evaporate, vaporize, and are discharged with the exhaust pipe 4.

[0052] Furthermore, the position of the support shaft 14 can be adjusted by the electric push rod 21, thereby controlling the contact time between the scraper 16 and the arc plate 20 and the inner wall of the inner shell 11, so that the mud cake can have sufficient time to dry after being applied to the inner wall of the inner shell 11.

[0053] The electric push rod 21 controls the scraper 16 to scrape off the sludge layer by layer. This layer-by-layer scraping method avoids the sudden increase in resistance caused by excessive scraping volume at once, making the scraping process more stable and efficient. Specifically, after the sludge on the inner wall of the inner shell 11 has dried for a certain period of time, the electric push rod 21 first pushes the support shaft 14 to the initial scraping position. At this time, some scraper blades 16 contact the sludge and scrape off the first layer of sludge. After the first layer of sludge falls to the crushing mechanism below, the electric push rod 21 continues to fine-tune the radial position of the support shaft 14, so that the remaining scraper blades 16 contact the sludge layers of different heights in sequence, achieving layered scraping. This layered scraping mechanism not only reduces the instantaneous load on a single scraper blade 16, but also ensures that each layer of sludge has reached the ideal degree of dryness before being scraped off by controlling the scraping interval time, effectively reducing the probability of wet sludge adhering to the inner wall of the inner shell 11. Simultaneously, in conjunction with the rotation of the support shaft 14 driven by the drive shaft 23, the scraper 16 can also perform circumferential cutting of the sludge layer during the layered scraping process, further breaking down large pieces of sludge into smaller fragments, facilitating subsequent crushing processing. Furthermore, the stroke of the electric push rod 21 can be precisely adjusted according to the actual thickness of the sludge. Its extension and retraction are controlled through a preset program, achieving precise control over the scraping thickness and avoiding damage to the inner wall of the inner shell 11 due to excessive scraping or excessive residue due to insufficient scraping.

[0054] like Figure 10 As shown, preferably, cavities are provided at both ends of the cylinder 2, and a sliding plate 32 is sleeved on the outer wall of the support shaft 14, with the sliding plate 32 and the cavity being slidably connected.

[0055] Since the position and height of the support shaft 14 will change due to the force of the electric push rod 21, slots for the support shaft 14 to move need to be reserved at both ends of the cylinder 2. This results in faster heat loss and increased energy consumption. At the same time, sludge is easily lost under the force, causing the device to become clogged.

[0056] In this embodiment, the cylindrical body 2 is provided with cavities at both ends, and the sliding plate 32 can move up and down within the cavity. The sliding plate 32 is sleeved on the surface of the support shaft 14. When the support shaft 14 moves, the sliding plate 32 moves up or down synchronously, ensuring the sealing of the cylindrical body 2 and effectively preventing the leakage of sludge, oil, gas and other media from the gap between the support shaft 14 and the cylindrical body 2, while not hindering the movement of the support shaft 14.

[0057] like Figure 2 and Figure 11 As shown, preferably, a sealing block 13 is slidably connected to the inner wall of the feed inlet 3, a limiting block 33 is fixedly connected to the outer wall of the sealing block 13, a groove is provided on the inner wall of the feed inlet 3 that matches the shape and contour of the limiting block 33, a sealing cover 12 is rotatably connected to the top of the sealing block 13, and the bottom of the sealing block 13 has the same shape and contour as the inner shell 11.

[0058] Because the feed inlet 3 is located on the outer wall of the cylinder 2, the sludge inside the cylinder 2 will flow out from the feed inlet 3 when the cylinder 2 is in motion, resulting in the loss of heat and sludge.

[0059] In this embodiment, by setting two feed ports 3 on the surface of the cylinder 2, the sludge is prevented from clogging at the inlet due to poor flowability when feeding from one end. When the cylinder 2 rotates under the drive of the first motor 7, the feed ports 3 rotate synchronously. The centrifugal force generated will throw the incoming sludge towards the inner wall of the inner shell 11. With the cooperation of the arc plate 20, the sludge is dispersed and coated on the inner wall, which shortens the coating time and reduces the risk of clogging. Furthermore, the two feed ports 3 effectively avoid the problem of uneven loading caused by single-point feeding, and further ensure that the sludge is evenly distributed on the inner wall of the inner shell 11.

[0060] Furthermore, the sealing block 13 can slide within the feed inlet 3. When feeding is required, the sealing cover 12 is rotated and pulled up to separate the sealing cover 12 from the feed inlet 3, allowing the sealing block 13 to detach from the feed inlet 3. After feeding is completed, it is pushed down along the chute. The contour of the bottom of the sealing block 13 matches the inner wall of the inner shell 11, forming a smooth inner wall, which avoids protrusions or depressions at the bottom of the feed inlet 3, affecting the passage and cleaning effect of the scraper 16.

[0061] Example 2

[0062] like Figure 4 and Figure 8As shown, based on Embodiment 1, the present invention provides a technical solution: preferably, the scrapers 16 are arranged in a linear array, and multiple scrapers 16 are arranged in an L-shape, with the top of the scrapers 16 and the inner wall of the inner shell 11 in contact.

[0063] As the sludge gradually dries after being coated on the inner wall of the inner shell 11, it needs to withstand a lot of resistance when it is peeled off by the scraper 16. Moreover, the peeled sludge is in large flakes and needs to be crushed again, which reduces the efficiency of sludge treatment.

[0064] In this embodiment, multiple L-shaped scrapers 16 are arranged axially, with their tops tightly fitted to the inner wall of the inner shell 11. During rotation, each scraper 16 is responsible for scraping off a section of sludge in an annular area. The multiple scrapers 16 work together to divide the sludge on the entire inner wall into several layers and scrape them off one by one. The sludge that falls off is small in volume and easier to break, avoiding excessive resistance on a single scraper 16, making scraping easier. The L-shaped design ensures that its edges always effectively fit the inner wall, guaranteeing the scraping effect.

[0065] like Figure 5 As shown, preferably, the outer wall of the drive shaft 23 is provided with a spiral groove 24, and the inner wall of the support shaft 14 is fixedly connected with a protrusion that matches the shape and contour of the spiral groove 24, and the protrusion and the spiral groove 24 are slidably connected.

[0066] Because multiple scrapers 16 are installed to reduce resistance in the process of scraping sludge, gaps exist between the scrapers 16, resulting in some sludge remaining on the inner wall of the inner shell 11.

[0067] In this embodiment, through the spiral groove 24 on the outer wall of the drive shaft 23, when the second motor 10 rotates, the protrusion on the inner wall of the support shaft 14 slides in the spiral groove 24, thereby pushing the support shaft 14 to move along the axial direction of the drive shaft 23, and thus causing the scraper 16 to move laterally. At this time, the residual sludge that was not scraped off in the first instance can be scraped off, avoiding the residual sludge from being heated for too long and causing it to produce harmful gases. The second motor 10 can rotate in the opposite direction to reset the scraper 16.

[0068] like Figure 8 As shown, preferably, each of the multiple scrapers 16 has a weakening groove 17 on one side, and the weakening groove 17 is elliptical in shape.

[0069] In this embodiment, the weakening groove 17 alters the local stiffness distribution of the scraper 16. When the scraper 16 contacts the inner wall of the inner shell 11 and is subjected to radial extrusion, the area where the weakening groove 17 is located preferentially undergoes slight elastic deformation. This allows the top edge of the scraper 16 to better adapt to any minor unevenness or curvature deviation that may exist on the inner wall of the inner shell 11, ensuring a tight fit between the scraper 16 and the inner wall and reducing local gaps caused by rigid contact, thereby reducing the risk of sludge residue. Simultaneously, the elliptical groove structure can absorb some of the impact load through its own deformation when the scraper 16 removes sludge, preventing irreversible bending or breakage of the scraper 16 due to excessive instantaneous resistance and extending the service life of the scraper 16.

[0070] Example 3

[0071] like Figure 9 As shown, based on Embodiment 1, the present invention provides a technical solution: Preferably, a limiting plate 30 is symmetrically fixedly connected to one side of the scraper 16, and a second spring 31 is fixedly connected to the inner sidewall of each of the two limiting plates 30. A round cover 18 is rotatably connected to the side of the scraper 16 near the limiting plate 30, and a vertical rod 19 is rotatably connected to the side of the scraper 16 near the round cover 18. The side of the second spring 31 away from the limiting plate 30 is fixedly connected to the vertical rod 19. The round cover 18 and the vertical rod 19 are fixedly connected. The top of the vertical rod 19 is arc-shaped, and the thickness of the vertical rod 19 is 3-8 mm.

[0072] Because the sludge produces gas during the drying process, the gas release rate is slow after the sludge is coated, resulting in low overall equipment efficiency.

[0073] In this embodiment, the circular cover 18 and the upright rod 19 are integrated as a whole. Under the action of the second spring 31, they are vertically positioned on the side of the scraper 16. After the sludge is coated, the upright rod 19 divides the sludge surface to allow gas to be discharged more quickly. It should be noted that the top of the upright rod 19 is higher than the scraper 16, and the surface of the upright rod 19 is in contact with the inner wall of the inner shell 11 when the height of the support shaft 14 is not adjusted. When the scraper 16 is working, the arc surface at the top of the upright rod 19 is squeezed, resulting in displacement to the left or right, so as to avoid affecting the scraper 16 in scraping the sludge. When the pressure is released, the upright rod 19 returns to its original position under the action of the second spring 31.

[0074] Specifically, the thickness of the upright 19 is 3-8 mm, creating gaps on the sludge surface. These gaps not only provide additional escape channels for the evaporation of moisture inside the sludge but also accelerate heat transfer to the deeper layers of the sludge, thus shortening the drying cycle. After the sludge is coated on the inner wall of the inner shell 11, the upright 19 rotates synchronously with the cylinder 2 under the drive of the support shaft 14. Its arc-shaped top will carve continuous, evenly spaced shallow grooves on the sludge surface. These shallow grooves are distributed on the sludge layer surface like capillaries, effectively breaking the dense hard shell formed on the sludge surface due to rapid heating, preventing the hard shell from hindering the evaporation of internal moisture and oil. At the same time, the thickness of the upright 19 is optimized. The size of 3-8 mm ensures that the gaps have sufficient ventilation cross-sectional area without causing excessive breakage of the sludge layer due to the upright 19 being too thick, maintaining the overall continuity of the sludge layer and ensuring smooth scraping by the scraper 16. In actual operation, the thickness of the uprights 19 can be flexibly selected according to the viscosity and moisture content of the sludge. For viscous sludge with high moisture content, thicker uprights 19 (e.g., 6-8 mm) are selected to form wider ventilation grooves; for loose sludge with low moisture content, thinner uprights 19 (e.g., 3-5 mm) are selected to prevent sludge from falling out of the gaps prematurely. In addition, the rotating connection design between the uprights 19 and the scraper 16 allows them to swing flexibly when squeezed by the inner wall of the inner shell 11. Combined with the elastic reset function of the second spring 31, this ensures that the uprights 19 always maintain effective contact with the sludge surface under different working conditions, continuously playing the role of grooving and ventilation.

[0075] Example 4

[0076] like Figure 4 As shown, based on Embodiment 1, the present invention provides a technical solution: preferably, the arc plate 20 is inclined, and the top of the arc plate 20 is bent inward with an expanding trend.

[0077] In this embodiment, after the sludge enters the inner shell 11, it forms an angle with the inner wall of the inner shell 11 through the inclined arc plate 20, making the sludge thinner and more evenly distributed during the coating process. At the same time, the top of the arc plate 20 bends inward, making it easier for the sludge to enter between the arc plate 20 and the inner wall of the inner shell 11, avoiding the accumulation of sludge on its top during rotation, which would cause some sludge to be insufficiently treated, and further making the sludge adhere more closely to the inner wall of the inner shell 11.

[0078] like Figure 6 and Figure 7As shown, preferably, a vibration generator 25 is fixedly connected to the top of the arc plate 20, and columns 26 are symmetrically installed on the top of the arc plate 20. A first spring 27 is fixedly connected to the top of each column 26. The first spring 27 is fixedly connected to the top of the inner wall of the connecting plate 15. Limiting rods 28 are symmetrically fixedly connected to both sides of the connecting plate 15. Waist-shaped grooves 29 are opened on both sides of the inner wall of the arc plate 20. Rubber pads are provided on the inner wall of the waist-shaped grooves 29. The limiting rods 28 and the waist-shaped grooves 29 are slidably connected.

[0079] Because the sludge needs to be crushed after drying, and some sludge will remain on the surface of the arc plate 20 during the coating process, the sludge treatment is not thorough.

[0080] In this embodiment, a closed cavity is formed by the arc-shaped plate 20 and the connecting plate 15. The cavity is equipped with a vibration generator 25 and a first spring 27. When vibration is generated, the adhesion between the sludge and the arc-shaped plate 20 is effectively broken, preventing the sludge from accumulating on the surface of the arc-shaped plate 20. At the same time, it assists in the subsequent crushing process. The limiting rod 28 slides in the waist-shaped groove 29, which limits the swing range of the arc-shaped plate 20, so that it remains elastic and does not overturn.

[0081] The working principle of this oil extraction sludge treatment device is explained in detail below.

[0082] like Figures 1-11 As shown, when feeding is required, rotate the sealing cover 12 and pull it up to separate the sealing cover 12 from the feed inlet 3, allowing the sealing block 13 to detach from the feed inlet 3. After feeding is completed, push it down along the chute. The bottom contour of the sealing block 13 matches the inner wall of the inner shell 11, forming a smooth inner wall. The cylinder 2 rotates at a constant speed under the action of the support wheel 6, the first motor 7, the gear 8, and the gear ring 9. The centrifugal force generated will throw the incoming sludge towards the inner wall of the inner shell 11. With the cooperation of the arc plate 20, the sludge is dispersed and coated on the inner wall, shortening the coating time. The inclined arc plate 20, together with the inner shell 11 An angle is formed between the inner walls, making the sludge thinner and more evenly distributed during the coating process. At the same time, the top of the arc plate 20 is bent inward to prevent sludge from accumulating on its top during rotation, which would cause some sludge to be insufficiently treated. The arc plate 20 and the connecting plate 15 form a closed cavity, and the cavity is equipped with a vibration generator 25 and a first spring 27. When vibration is generated, it effectively breaks the adhesion between the sludge and the arc plate 20, preventing the sludge from accumulating on the surface of the arc plate 20, and assisting in subsequent crushing. The limiting rod 28 slides in the waist groove 29, limiting the swing range of the arc plate 20.

[0083] There is a sandwich between the inner shell 11 and the cylinder 2. Therefore, the hot air generated by the external heat source is blown into this sandwich. The hot air flows in the sandwich and indirectly transfers heat to the thin layer of sludge coated on the inner wall of the inner shell 11 through the wall surface of the inner shell 11. This effectively avoids local overheating that causes the sludge to coke and carbonize rapidly and produce harmful substances. At the same time, it increases the overall heat exchange area. The electric push rod 21 pushes the support plate 22 to move radially, which in turn causes the support shaft 14 to move. At this time, the top of the scraper 16 is in contact with the inner wall of the inner shell 11, and the distance between the arc plate 20 and the inner shell 11 increases. The scraper 16 is used to scrape off the dried sludge. The cylinder 2 has cavities at both ends. The sliding plate 32 can move up and down in the cavity. The sliding plate 32 is sleeved on the surface of the support shaft 14. When the support shaft 14 moves, the sliding plate 32 moves up or down synchronously, which ensures the sealing of the cylinder 2.

[0084] Multiple L-shaped scrapers 16 are distributed axially, with their tops tightly fitted against the inner wall of the inner shell 11. During rotation, each scraper 16 is responsible for scraping away sludge from a section of annular area. The combined action of multiple scrapers 16 divides the sludge on the entire inner wall into several layers, scraping them off sequentially. The falling sludge is small in volume and easier to break, avoiding excessive resistance on a single scraper 16. When the second motor 10 rotates, the protrusions on the inner wall of the support shaft 14 slide within the spiral groove 24, thereby pushing the support shaft 14 to move along the axial direction of the drive shaft 23, which in turn causes the scraper 16 to shift laterally. At this time, residual sludge that was not scraped off initially can be removed, preventing the residual sludge from being heated for too long and generating harmful gases. Reversing the rotation of the second motor 10 can reset the scraper 16, and the weakening groove 17 changes... The scraper 16 has a local stiffness distribution. The round cover 18 and the upright 19 are a whole. Under the action of the second spring 31, they are vertically located on the side of the scraper 16. After the sludge coating is completed, the upright 19 divides the sludge surface to allow gas to be discharged more quickly. It should be noted that the top of the upright 19 is higher than the scraper 16, and the surface of the upright 19 is in contact with the inner wall of the inner shell 11 when the height of the support shaft 14 is not adjusted. When the scraper 16 is working, the arc surface at the top of the upright 19 is squeezed, resulting in displacement to the left or right, so as to avoid affecting the scraper 16 in scraping the sludge. When the pressure is released, the upright 19 returns to its original position under the action of the second spring 31. The thickness of the upright 19 is 3-8 mm, which allows gaps to exist on the sludge surface. The water and petroleum hydrocarbons in the sludge gradually evaporate, vaporize and are discharged with the exhaust pipe 4.

[0085] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. An oil extraction sludge treatment device, comprising a device base (1); characterized in that: A first motor (7) is symmetrically arranged on the top of the device base (1). A gear (8) is fixedly connected to the output end of the first motor (7). A gear ring (9) is meshed with the outer wall of the gear (8). A cylinder (2) is fixedly connected to the inner wall of the gear ring (9). A support wheel (6) is fixedly connected to the top of the device base (1). The inner side wall of the support wheel (6) is in contact with the cylinder (2). Two feed inlets (3) are fixedly connected to the outer wall of the cylinder (2). An exhaust pipe (4) is fixedly connected to one end of the cylinder (2). An inner shell (11) is fixedly connected to the inner wall of the cylinder (2). A second motor (10) is fixedly connected to one end of the cylinder (2). The output end of the second motor (10) is fixedly connected to the second motor (10). A drive shaft (23) is connected to the device base (1). A support shaft (14) is sleeved on the outer wall of the drive shaft (23). A scraper (16) is fixedly connected to the outer wall of the support shaft (14). A connecting plate (15) is fixedly connected to the side of the support shaft (14) away from the scraper (16). An arc plate (20) is hinged to one side of the connecting plate (15). A housing (5) is symmetrically fixedly connected to the top of the device base (1). An electric push rod (21) is fixedly connected to the inner side wall of the housing (5). A support plate (22) is fixedly connected to the top of the electric push rod (21). The top of the support plate (22) is fixedly connected to both ends of the support shaft (14). The two sides of the support plate (22) are slidably connected to the housing (5). The scrapers (16) are arranged in a linear array, and all of the scrapers (16) are arranged in an L-shape; A limiting plate (30) is symmetrically fixedly connected to one side of the scraper (16). A second spring (31) is fixedly connected to the inner sidewall of each of the two limiting plates (30). A round cover (18) is rotatably connected to the side of the scraper (16) near the limiting plate (30). A vertical rod (19) is rotatably connected to the side of the scraper (16) near the round cover (18). The side of the second spring (31) away from the limiting plate (30) is fixedly connected to the vertical rod (19). The round cover (18) and the vertical rod (19) are fixedly connected. The top of the vertical rod (19) is higher than the scraper (16). When the height of the support shaft (14) is not adjusted, the surface of the vertical rod (19) is in contact with the inner wall of the inner shell (11). The top of the pole (19) is set in an arc shape.

2. The oil extraction sludge treatment device according to claim 1, characterized in that: The outer wall of the drive shaft (23) is provided with a spiral groove (24), and the inner wall of the support shaft (14) is fixedly connected with a protrusion that matches the shape and contour of the spiral groove (24). The protrusion and the spiral groove (24) are slidably connected.

3. The oil extraction sludge treatment device according to claim 2, characterized in that: Each of the multiple scrapers (16) has a weakening groove (17) on one side, and the weakening groove (17) is elliptical.

4. The oil extraction sludge treatment device according to claim 1, characterized in that: The arc-shaped plate (20) is inclined, and the top of the arc-shaped plate (20) is bent inward.

5. The oil extraction sludge treatment device according to claim 4, characterized in that: A vibration generator (25) is fixedly connected to the top of the arc plate (20). Columns (26) are symmetrically installed on the top of the arc plate (20). A first spring (27) is fixedly connected to the top of each column (26). The first spring (27) is fixedly connected to the top of the inner wall of the connecting plate (15). Limiting rods (28) are symmetrically fixedly connected to both sides of the connecting plate (15). Waist-shaped grooves (29) are opened on both sides of the inner wall of the arc plate (20). Rubber pads are provided on the inner wall of the waist-shaped grooves (29). The limiting rods (28) and the waist-shaped grooves (29) are slidably connected.

6. The oil extraction sludge treatment device according to claim 5, characterized in that: Both ends of the cylinder (2) are provided with cavities, and the outer wall of the support shaft (14) is fitted with a sliding plate (32), which is slidably connected to the cavity.

7. The oil extraction sludge treatment device according to claim 6, characterized in that: The inner wall of the feed inlet (3) is slidably connected to a sealing block (13), and the outer wall of the sealing block (13) is fixedly connected to a limiting block (33). The inner wall of the feed inlet (3) is provided with a sliding groove that matches the shape and contour of the limiting block (33). The top of the sealing block (13) is rotatably connected to a sealing cover (12), and the bottom of the sealing block (13) has the same shape and contour as the inner shell (11).

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