Oil sludge-containing waste gas treatment device and treatment method thereof

Abstract

The application discloses an oil-containing sludge waste gas treatment device and a treatment method thereof, and relates to the technical field of waste gas treatment. The oil-containing sludge waste gas treatment device comprises a filter tower and a separation tower connected with the gas outlet end of the filter tower. The separation tower comprises an outer shell and an inner shell located in the outer shell. The gas and solid are centrifuged in the inner shell through a centrifugal mechanism. The inner shell is a cylindrical structure surrounded by multiple groups of straight plates. Adjacent two groups of straight plates have an overlapping area to form a sealed state between the two groups of straight plates. A slidable receiving cross plate is arranged in the area near the lower end of the inner shell along the thickness direction of the inner shell. The two ends of the receiving cross plate protrude from the surface of the inner shell. The oil-containing sludge waste gas treatment device and the treatment method thereof are characterized in that the dust scraping action is performed on the outer surface of the inner shell, which realizes the discharge of impurities outside and the discharge of clean gas flow inside, and achieves the purpose of complete separation of impurities and clean gas flow.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, specifically to a waste gas treatment device and method containing oily mud and sand. Background Technology

[0002] Oily sludge and sand particles are widely distributed, have high oil content, and complex composition, making them difficult to process but also highly valuable for recovery. Currently, the conventional method for treating oily sludge and sand is to first perform physical pretreatment. Physical separation is the preliminary or core step in the treatment of oily sludge and sand, with the aim of separating oil, sand, and water. Common processes include centrifugation, filtration, sedimentation, and flotation. Chemical treatment follows physical separation.

[0003] Volatile organic compounds (VOCs) are generated during the physical separation stage. If the oil sludge contains sulfur (such as sulfides associated with crude oil or sulfur-containing additives), it will slowly release hydrogen sulfide at room temperature or with slight heating. As the separation proceeds, sand particles escape with the airflow (especially in centrifugal separation and wind separation stages) or are lifted up by the dried oily residue.

[0004] The airflow carrying sand and soil must be treated to meet standards before it can be discharged. For the treatment of organic compounds, adsorption or absorption methods are generally used. The adsorption method utilizes the porous structure of adsorbents such as activated carbon, molecular sieves, and activated carbon fibers to fix VOC molecules on the surface of the adsorbent through molecular attraction / chemical bonding, thereby achieving a separation effect. After saturation, the adsorbent needs to be regenerated through thermal desorption, steam desorption, or other methods. The absorption method utilizes the difference in solubility of VOCs in absorbents (such as diesel, water, and special organic solvents) to make the waste gas come into countercurrent contact with the absorbent, whereby the VOCs are dissolved or absorbed, and then separated and recovered from the absorbent through distillation, extraction, or other methods.

[0005] However, regardless of which of the above treatment methods is used, it is necessary to separate the sand particles in the airflow before treatment, so as to prevent the sand particles from participating in subsequent adsorption and absorption, thereby extending the life of the adsorption tower and absorption tower.

[0006] In existing technologies, gas-solid separation is generally achieved by filtering followed by cyclone separation. Such gas-solid separation equipment includes centrifugal devices with forced centrifugation and cyclone separators. However, cyclone separators are not suitable for the fine separation of micro dust particles.

[0007] Forced centrifugation equipment typically uses a mesh inner tank. During centrifugation, solid particles pass through the mesh structure, reach the inner wall of the outer shell, and are discharged downwards. This type of device has the following drawbacks for exhaust gases containing oil, mud, and sand:

[0008] 1. The outer shell and the mesh inner liner are in a connected state, which causes the airflow to be discharged directly along with the impurities into the impurity discharge pipe, preventing this part of the airflow from entering the next waste gas reaction treatment process through the original exhaust pipe.

[0009] 2. Oily sand and gravel impurities adhere to the inner liner and the inner wall of the outer shell and cannot be cleaned. Summary of the Invention

[0010] To address the shortcomings of existing technologies, this invention provides an oily sludge and sand waste gas treatment device and method, which solves the aforementioned problems.

[0011] To achieve the above objectives, the present invention provides the following technical solution: an oily sludge and sand waste gas treatment device, comprising a filter tower and a separation tower connected to the outlet of the filter tower. The separation tower includes: an outer shell; and an inner shell, the inner shell being located inside the outer shell. Gas-solid centrifugation is performed within the inner shell via a centrifugal mechanism. The inner shell and the outer shell are sealed to prevent gas exchange. The inner shell is a cylindrical structure formed by multiple sets of straight plates, with overlapping areas between adjacent sets of straight plates to create a sealed state between them. The inner shell is located near the lower part of the outer shell. The end region is provided with a sliding receiving plate along its own thickness direction. Both ends of the receiving plate protrude from the surface of the inner shell, and the protruding part is used to receive solid particles from above. The oily mud and sand exhaust gas treatment device also includes a driving component and a shaving component. The driving component is used to drive the straight plate to rotate axially, so that the inner and outer surfaces of the inner shell are exchanged. The shaving component is located between the inner shell and the outer shell, and can scrape off the impurities on the outer surface of the inner shell and can push the receiving plate to slide radially towards the center of the inner shell, forming a state of separation and discharge of impurities and airflow.

[0012] Furthermore, a groove is provided at the bottom of the receiving horizontal plate, a guide rod is provided in the groove, the guide rod passes through the straight plate, and springs are provided on both sides of the guide rod;

[0013] The dust removal assembly includes an annular scraper and a pressure block installed below the annular scraper. The pressure block is opposite to the center line of the straight plate. The annular scraper and the pressure block descend synchronously. The annular scraper is used to scrape off solid particles from the outer surface of the straight plate.

[0014] The inner and outer surfaces of the straight plate are equipped with scrapers in the areas opposite to the upper surface of the receiving horizontal plate. Both sides of the receiving horizontal plate have slopes, and the bottom surface of the pressure block has a slope structure, so that when the pressure block moves down, it can push the receiving horizontal plate, so that the scrapers can scrape off the impurities on the upper surface of the receiving horizontal plate, and so that the solid particles scraped off by the pressure block can fall downwards.

[0015] Furthermore, a top plate is suspended from the inner top surface of the outer shell by a hanger, and a receiving cavity is formed on the lower end surface of the top plate;

[0016] It also includes a limiting plate, which can move upward into the receiving cavity and downward into the straight plate to lock the shape of the inner shell;

[0017] The top of the outer casing is equipped with a cylinder for driving the lifting and lowering of the limiting plate.

[0018] Furthermore, a rotating shaft is fixedly provided at both the upper and lower ends of the straight plate, and a first gear is fixedly provided on the rotating shaft. A rotating gear ring meshes with the periphery of multiple first gears.

[0019] A second gear is fixed to the upper end of one of the rotating shafts, and the driving member can drive the second gear to rotate.

[0020] Furthermore, the driving element includes:

[0021] A flip motor is mounted on the top surface of the housing, and a flip gear is fixed at its power output end to drive the second gear to rotate.

[0022] Furthermore, a conical head is fixed at the bottom of the outer shell, and the inner shell, top plate and conical head form a sealed space.

[0023] Furthermore, the separation tower is provided in two sets, with an exhaust pipe located at the lower part of the conical head. The exhaust pipe includes:

[0024] An exhaust branch pipe is located below the conical head. A V-shaped structure is formed between the two sets of exhaust branch pipes. The middle part of the exhaust branch pipe has a constriction section. A connecting suction pipe is connected between the two sets of constriction sections. The V-tip area of ​​the two sets of constriction sections is provided with an exhaust main pipe.

[0025] Furthermore, an air supply pipe is provided between the filter tower and the separation tower, and a branch pipe connected to the separation tower is provided on the air supply pipe, with a solenoid valve installed on the branch pipe.

[0026] Furthermore, the centrifugation mechanism includes:

[0027] A centrifugal central shaft is located inside the inner shell and is coaxial with the inner shell. A centrifugal impeller is fixed at the lower end of the centrifugal central shaft. The upper ends of the two sets of centrifugal central shafts are connected by a belt drive structure. A motor for driving one of the centrifugal central shafts to rotate is installed on the top of the outer shell.

[0028] On the other hand, the present invention also provides a method for treating oily sludge and sand-containing waste gas, applicable to the above-mentioned method for treating oily sludge and sand-containing waste gas, comprising the following steps:

[0029] A method for treating oily mud and sand-containing waste gas, applicable to the aforementioned oily mud and sand-containing waste gas treatment device, characterized by comprising the following steps:

[0030] Step 1: The waste gas generated during the treatment of oily mud and sand is filtered by the filter tower and then enters the inner shell where it is separated into solid and gas by the centrifugal mechanism. The solid particles reach the inner wall of the inner shell due to the centrifugal force and fall onto the surface of the receiving plate.

[0031] Step 2: After the required separation time, the solenoid valve corresponding to the first inner shell is closed, so that the first inner shell no longer takes in air, while the second inner shell continues to take in air. When the second inner shell exhausts air, a negative pressure is formed in the area of ​​the second contraction section, and the clean gas in the first inner shell is sucked away through the connecting suction tube, so that the clean gas in the first inner shell is emptied.

[0032] Step 3: Control the cylinder to drive the limit plate to unlock the inner shell, and drive the straight plate to rotate 180°, so that the inner and outer surfaces of the inner shell are exchanged. After the exchange is completed, the solenoid valve is reopened, allowing the first separation tower to re-enter the air.

[0033] Step 4: Repeat the actions of the first inner shell in Steps 2 and 3 for the second inner shell, and repeat the actions of the second inner shell in Steps 2 and 3 for the first inner shell.

[0034] Step 5: Control the action of the scraping component to simultaneously scrape the outer surfaces of the two inner shells, the upper surface of the receiving cross plate, and the oil.

[0035] Step 6: Repeat the actions in steps 2 through 5.

[0036] The present invention has the following beneficial effects:

[0037] (1) The oily mud and sand exhaust gas treatment device and its treatment method, the scraping action is performed on the outer surface of the inner shell, which realizes the discharge of impurities outside and the discharge of clean air inside, achieving the purpose of complete separation of impurities and clean air, greatly reducing the solid content in the airflow and the situation where some non-clean gas is carried when the solid particles are discharged.

[0038] (2) The oily mud and sand exhaust gas treatment device and its treatment method are provided with a receiving horizontal plate. Under the action of centrifugal force, the impurities reach the bottom of the inner shell and are received by the receiving horizontal plate. During the descent, the scraping component can not only scrape off the oily impurities on the outer surface of the inner shell, but also push the receiving horizontal plate to move. Thus, on the one hand, the scraper can scrape off the impurities on the upper surface of the receiving horizontal plate, and on the other hand, the receiving horizontal plate will not block the solid particles scraped off by the pressure block from falling downward.

[0039] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0040] Figure 1 This is an external view of the present invention;

[0041] Figure 2 This is the front view of the present invention;

[0042] Figure 3 This is a schematic diagram of the exhaust pipe structure of the present invention;

[0043] Figure 4 This is a schematic diagram of the internal structure of the outer casing of the present invention;

[0044] Figure 5 For the present invention Figure 4 Exploded view;

[0045] Figure 6 This is a top view of the inner shell of the present invention;

[0046] Figure 7 This is a diagram showing the state where the limiting plate of the present invention is not locked to the inner shell;

[0047] Figure 8 This is a schematic diagram of the installation of the horizontal support plate of the present invention;

[0048] Figure 9 This is a diagram showing the state of the annular scraper and pressure block of the present invention as they move downwards to the area close to the receiving horizontal plate.

[0049] Figure 10 For the present invention Figure 9 A diagram showing the continuous downward movement of the central ring scraper and pressure block, pushing the receiving horizontal plate.

[0050] Figure 11 This is an external view of the scraping component of the present invention;

[0051] Figure 12 This is an exploded view of the top plate and the limiting plate of the present invention;

[0052] Figure 13 For the present invention Figure 4 A partial view;

[0053] Figure 14 This is a schematic diagram showing the positions of the drive component and the cylinder of the present invention;

[0054] Figure 15 This is an assembly drawing of the limiting plate, pressure rod, and cylinder of the present invention;

[0055] Figure 16 This is a diagram showing the state changes of the inner shell of the present invention, wherein... Figure 16 (a) in the diagram shows the initial state of the candybar display after flipping. Figure 16 (b) shows the state of the candybar flipped 180°. Figure 16 (c) in the diagram shows the state of the supporting horizontal plate being pushed.

[0056] Figure 17 This is a schematic diagram of the centrifuge mechanism of the present invention.

[0057] In the diagram: 1. Filter tower; 2. Gas supply pipe; 21. Branch pipe; 22. Solenoid valve; 3. Separation tower; 31. Outer shell; 32. Lower end plate; 33. Receiving ring groove; 34. Straight plate; 341. First gear; 342. Second gear; 343. Rotating shaft; 344. Rotating gear ring; 345. Receiving horizontal plate; 346. Spring; 347. Guide rod; 348. Scraper; 35. Top plate; 351. Hanger; 352. Receiving cavity; 36. Conical head; 37. 4. Spokes; 5. Pressure bar; 6. Exhaust pipe; 7. Exhaust branch pipe; 8. Contraction section; 9. Connecting suction pipe; 10. Exhaust main pipe; 11. Centrifugal mechanism; 12. Centrifugal impeller; 23. Centrifugal central shaft; 34. Belt drive structure; 15. Motor 1; 26. Drive component; 37. Tilting motor; 48. Tilting gear; 19. Limiting plate; 20. Dust scraper assembly; 21. Guide post; 32. Lead screw; 33. Annular scraper; 44. Nut; 55. Pressure block; 66. Cylinder. Detailed Implementation

[0058] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0060] The following is based on Figures 1-17 This invention describes the oily mud and sand waste gas treatment device and its treatment method provided in the embodiments of the present invention.

[0061] Please refer to Figure 1 and Figure 2 As shown, this embodiment of the invention provides an oily mud and sand waste gas treatment device, including a filter tower 1 and a separation tower 3 connected to the outlet of the filter tower 1. During the treatment of oily mud and sand, waste gas is generated. The waste gas can first undergo preliminary coarse filtration in the filter tower 1, and the waste gas carrying fine solid particles and oil impurities can enter the separation tower 3 for secondary separation.

[0062] Specifically, the aforementioned separation tower 3 includes an outer shell 31 and an inner shell, with the inner shell located inside the outer shell 31. Preferably, the two are concentric. A centrifugal mechanism 6 is provided in the inner shell. When the centrifugal mechanism 6 is working, it can generate centrifugal force in the sand- and oil-containing gas inside the inner shell, and cause it to undergo gas-solid centrifugation. The oil and sand can reach the inner wall of the inner shell due to the centrifugal force, and the crystallized gas is discharged from the bottom of the inner shell.

[0063] Combination Figures 3-5 As shown, the inner shell is a cylindrical structure formed by multiple sets of straight plates 34, with overlapping areas between adjacent sets of straight plates 34 (e.g., Figure 6 As shown, the ends of two adjacent straight plates 34 overlap to form a sealed state between the two sets of straight plates 34, that is, the centrifugal separation operation is carried out inside the inner shell. A slidable receiving horizontal plate 345 is provided along its thickness direction in the area near the lower end of the inner shell. Both ends of the receiving horizontal plate 345 protrude from the surface of the inner shell, and the protruding parts are used to receive solid particles from above. To achieve the cleaning of oil and sand from the inner wall of the inner shell and the upper surface of the receiving horizontal plate 345, the oily mud and sand exhaust gas treatment device also includes a drive component 7 and a scraping assembly 9. The drive component 7 is used to drive the straight plates. 34 is rotated axially to exchange the inner and outer surfaces of the inner shell. This exchange allows impurities on the inner surface of the inner shell and dust on the upper surface of the receiving horizontal plate 345 to be rotated to the outer surface of the inner shell. The dust scraping assembly 9 is located between the inner shell and the outer shell 31. The dust scraping assembly 9 moves downward to scrape the dust off the outer surface of the inner shell. It can also push the receiving horizontal plate 345 to slide radially toward the center of the inner shell. When it slides, it can avoid blocking the impurities scraped off from the outer surface of the inner shell by the dust scraping assembly 9. On the other hand, it can scrape off the impurities on the upper surface of the receiving horizontal plate 345 itself.

[0064] Therefore, in the oily mud and sand exhaust gas treatment device provided by the present invention, during the separation stage, impurities do not flow continuously downward with the airflow, but are received by the receiving horizontal plate 345. The receiving horizontal plate 345 can be flipped to the outside along with the straight plate 34, so that the ash scraping action is performed on the outer surface of the inner shell. This achieves the purpose of completely separating impurities and clean airflow by discharging them from the outside and the inside, greatly reducing the amount of solids in the airflow and the situation where some unclean gas is carried when the solid particles are discharged.

[0065] The flipping process is as follows Figures 6-16 (a)- Figure 16 (b).

[0066] Combination Figures 4-7 As shown, preferably, a top plate 35 is suspended on the inner top surface of the outer shell 31 by a hanger 351, and a conical head 36 is fixed at the bottom of the outer shell 31. The inner shell, the top plate 35 and the conical head 36 form a sealed space, thereby avoiding air leakage during centrifugal operation.

[0067] In addition, to further ensure sealing, it is preferable to provide sealing gaskets in the area where the lower surface of the top plate 35 contacts the straight plate 34 and in the area where the upper surface of the conical head 36 contacts the straight plate 34. When the straight plate 34 is not flipped, the top plate 35 and the straight plate 34 are sealed, and the conical head 36 and the straight plate 34 are sealed.

[0068] Preferably, a lower end plate 32 is installed on the periphery of the conical head 36 via spokes 37, and the lower end plate 32 is fixed to the outer shell 31 by bolts. A receiving ring groove 33 is threaded or inserted below the lower end plate 32 to receive impurities.

[0069] Reference Figures 7-11 As shown, the aforementioned receiving plate 345 moves radially along the inner shell. The specific structure includes: a groove is provided at the bottom of the receiving plate 345, and a guide rod 347 is provided within the groove. The guide rod 347 passes through the straight plate 34, and springs 346 are provided on both sides of the guide rod 347. When the side of the receiving plate 345 furthest from the center of the inner shell is subjected to pressure, it can gradually approach the center of the inner shell. Scrapers 348 are provided on the inner and outer surfaces of the straight plate 34 in areas opposite to the upper surface of the receiving plate 345 (see reference). Figure 9 To better understand, the scraping assembly 9 includes an annular scraper 93 and a pressure block 95 installed below the annular scraper 93. The pressure block 95 is aligned with the center line of the straight plate 34. The annular scraper 93 and the pressure block 95 descend synchronously. The annular scraper 93 is used to scrape off solid particles from the outer surface of the straight plate 34. Both sides of the receiving horizontal plate 345 have slopes, and the bottom surface of the pressure block 95 has a sloped structure, so that the pressure block 95 can push the receiving horizontal plate 345 when it moves down. Figure 16 (b)- Figure 16 (c) The process allows the scraper 348 to scrape off impurities from the upper surface of the receiving plate 345, and allows the solid particles scraped off by the pressure block 95 to fall downwards.

[0070] Specifically, the aforementioned dust removal assembly 9 also includes a lead screw 92 located between the inner shell and the outer shell 31. A nut 94 is provided on the lead screw 92, and the nut 94 is fixedly connected to the annular scraper 93. When the lead screw 92 rotates, the annular scraper 93 can move up and down to scrape off the impurities.

[0071] Preferably, a guide post 91 is provided between the inner shell and the outer shell 31 to guide the annular scraper 93.

[0072] Furthermore, since the straight plate 34 is in a flip-up state, it is prone to slight deflection when subjected to gas pressure inside the inner shell. This causes the inner shell to fail to seal, resulting in exhaust gas being discharged directly from the gap between two adjacent straight plates 34. Therefore, this embodiment of the invention also provides a limiting plate 8, which has a receiving cavity 352 on the lower end face of the top plate 35. The limiting plate 8 can move upward into the receiving cavity 352 and be hidden. At this time, the straight plate 34 is in a flip-up state. Conversely, when the limiting plate 8 moves downward into the inner shell, it can lock the shape of the inner shell, preventing the straight plate 34 from deflecting slightly and ensuring sealing.

[0073] like Figure 15 In order to achieve the lifting and lowering of the limit plate 8, a corresponding pressure rod 4 and cylinder 10 are also provided.

[0074] Furthermore, in order to achieve the flipping of the aforementioned straight plate 34, a rotating shaft 343 is fixedly provided at both the upper and lower ends of the straight plate 34. A first gear 341 is fixedly provided on the rotating shaft 343. A rotating gear ring 344 meshes with the periphery of multiple first gears 341. The upper end of the rotating gear ring 344 should be mounted on the top surface inside the housing 31 through a larger bearing ring. A second gear 342 is fixedly provided at the upper end of one of the rotating shafts 343. The driving member 7 can drive the second gear 342 to rotate. When the second gear 342 rotates, it can drive the first gear 341 to rotate through one of the rotating shafts 343, thereby causing the entire rotating gear ring 344 to rotate. When the rotating gear ring 344 rotates, it can drive all the first gears 341 to rotate, thereby achieving the purpose of flipping all the straight plates 34.

[0075] Combination Figure 13 and Figure 14 As shown, specifically, the driving component 7 includes a flipping gear 72 and a flipping motor 71. The flipping motor 71 is mounted on the top surface of the housing 31 and is used to drive the flipping gear 72 to rotate. The flipping gear 72 can mesh with the second gear 342, and the flipping gear 72 can drive the second gear 342 to rotate, thereby realizing the flipping of the straight plate 34.

[0076] Combination Figure 2 and Figure 3 As shown, in order to ensure that the airflow discharge and impurity discharge are isolated from each other, the separation tower 3 here is provided with two sets. The lower part of the conical head 36 is provided with an exhaust pipe 5. The exhaust pipe 5 includes an exhaust branch pipe 51, which is located below the conical head 36. The two sets of exhaust branch pipes 51 form a V-shaped structure. The middle part of the exhaust branch pipe 51 has a contraction section 52. The two sets of contraction sections 52 are connected by a connecting suction pipe 53. The V-tip area of ​​the two sets of contraction sections 52 is provided with an exhaust main pipe 54.

[0077] In this implementation scheme, in the initial state, the two separation towers 3 operate synchronously. After the set working time, one of the separation towers 3 (hereinafter referred to as the first separation tower 3) stops air intake, while the other separation tower 3 (hereinafter referred to as the second separation tower 3) continues to work and exhausts air. When it exhausts air, it can generate negative pressure in the contraction section 52 and draw air into the first separation tower 3 through the connecting suction pipe 53. That is, at this time, the gas in the inner shell of the first separation tower 3 can be emptied, realizing that the gas in the separation tower 3 that has stopped air intake can be emptied. After emptying, the first separation tower 3 begins to lift the limit plate 8 and flip the straight plate 34. After flipping, the ash scraping component 9 does not move first, waiting for the second separation tower 3 to stop air intake and empty. Finally, the ash scraping component 9 is put into operation, and the outer surfaces of the two inner shells are cleaned at the same time.

[0078] Preferably, an air supply pipe 2 is provided between the filter tower 1 and the separation tower 3. The air supply pipe 2 is provided with a branch pipe 21 that communicates with the separation tower 3. A solenoid valve 22 is installed on the branch pipe 21 to control the air intake and non-air intake of the separation tower 3 independently.

[0079] It should be noted that, since two sets of separation towers 3 are set up, the upper ends of the lead screws 92 in the two sets of separation towers 3 pass through the upper end of the outer shell 31 and are assembled with driven gears. A driving gear is set between the two driven gears and equipped with a motor to drive the driving gear to rotate, so as to realize the synchronous operation of the two sets of ash scraping components 9.

[0080] like Figure 17 Preferably, the centrifugal mechanism 6 mentioned above includes a centrifugal central shaft 62, which is located inside the inner shell and is coaxial with the inner shell. A centrifugal impeller 61 is fixed at the lower end of the centrifugal central shaft 62. The upper ends of the two sets of centrifugal central shafts 62 are connected by a belt drive structure 63. A motor 64 for driving one of the centrifugal central shafts 62 to rotate is installed on the top of the outer shell 31.

[0081] In this embodiment, when the motor 64 rotates, it can drive the centrifugal shaft 62 to rotate. When the centrifugal shaft 62 rotates, the centrifugal impeller 61 can generate centrifugal force on the exhaust gas, forming a state of gas-solid separation.

[0082] In operation: Exhaust gas is introduced into filter tower 1 for initial filtration to remove large oil and sand particles. The filtered gas then enters the inner shells of the two filter towers 3 through the gas supply pipe 2 and branch pipe 21. When the centrifugal mechanism 6 is working, it can separate the solid and gaseous parts of the exhaust gas. The separated gas is discharged from the exhaust pipe 5. The separated oily solid particles reach the inner wall of the inner shell and fall down the inner wall to the upper surface of the receiving plate 345. After the two separation towers 3 have been separating for a period of time (preferably 10 to 20 minutes), the solenoid valve 22 on the first separation tower 3 is closed, that is, the first separation tower 3 stops intake, while the second separation tower 3 continues to intake and exhaust. When the second separation tower 3 exhausts, it can generate negative pressure in the contraction section 52, and draw air into the first separation tower 3 through the connecting suction pipe 53. At this time, the gas in the inner shell of the first separation tower 3 can be emptied, thus stopping the intake. The gas inside the separation tower 3 can be vented. After venting, the first separation tower 3 begins to lift the limit plate 8 and flip the straight plate 34 (the reason for venting before flipping is to prevent the gas in the inner shell from entering the space between the inner shell and the outer shell 31 during flipping). After flipping, the ash scraping assembly 9 does not move. Then, the solenoid valve 22 on the first separation tower 3 opens and the solenoid valve 22 on the second separation tower 3 closes. After the second separation tower 3 stops intake and venting, the ash scraping assembly 9 is activated. During its operation, the outer surfaces of the two inner shells are cleaned simultaneously. During cleaning, the screw 92 rotates, driving the annular scraper 93 to move downwards and scrape off the impurities on the outer surface of the inner shell. As the pressure block 95 gradually moves downwards, it can push the receiving horizontal plate 345, so that the scraper 348 scrapes off the impurities on the upper surface of the receiving horizontal plate 345, and the solid particles scraped off by the pressure block 95 can fall downwards.

[0083] Repeating the above process allows for separation operations without shutting down the machine, and ensures the separate discharge of airflow and impurities.

[0084] On the other hand, the present invention also provides a method for treating oily sludge and sand waste gas, applicable to the above-mentioned method for treating oily sludge and sand waste gas, comprising the following steps:

[0085] Step 1: The waste gas generated during the treatment of oily mud and sand is filtered by the filter tower 1 and then enters the inner shell where it is separated into solid and gas by the centrifugal mechanism 6. The solid particles reach the inner wall of the inner shell due to the centrifugal force and fall onto the surface of the receiving plate 345.

[0086] Step 2: After the required separation time, the solenoid valve 22 corresponding to the first inner shell is closed, so that the first inner shell no longer takes in air, while the second inner shell continues to take in air. When the second inner shell exhausts air, a negative pressure is formed in the area of ​​the second contraction section 52 and the clean gas in the first inner shell is sucked away through the connecting suction tube 53, so that the clean gas in the first inner shell is emptied.

[0087] Step 3: Control cylinder 10 drives limit plate 8 to lift and unlock inner shell, and drive drive 7 to drive straight plate 43 to rotate 180°, so that the inner and outer surfaces of inner shell are exchanged. After the exchange is completed, solenoid valve 22 is reopened to allow the first separation tower 3 to re-enter air.

[0088] Step 4: Repeat the actions of the first inner shell in Steps 2 and 3 for the second inner shell, and repeat the actions of the second inner shell in Steps 2 and 3 for the first inner shell.

[0089] Step 5: Control the action of the scraping component 9 so that the scraping component 9 can simultaneously scrape the outer surfaces of the two inner shells and the upper surface of the receiving cross plate 345.

[0090] Step 6: Repeat the actions in steps 2 through 5.

[0091] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0092] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A device for treating oily mud and sand exhaust gas, comprising a filter tower (1) and a separation tower (3) connected to the outlet end of the filter tower (1), characterized in that, The separation tower (3) includes: Outer shell (31); The inner shell is located inside the outer shell (31). The inner shell is centrifuged by a centrifugal mechanism (6) for gas and solid centrifugation. The inner shell and the outer shell are sealed to each other and no gas is exchanged. The inner shell is a cylindrical structure formed by multiple sets of straight plates (34). There is an overlapping area between two adjacent sets of straight plates (34) to form a sealed state between the two sets of straight plates (34). The area near the lower end of the inner shell is provided with a sliding receiving cross plate (345) along its own thickness direction. Both ends of the receiving cross plate (345) protrude from the surface of the inner shell. The protruding part is used to receive solid particles from above. The oily mud and sand exhaust gas treatment device also includes a drive component (7) and a scraper assembly (9). The drive component (7) is used to drive the straight plate (34) to rotate axially, so that the inner and outer surfaces of the inner shell are exchanged. The scraper assembly (9) is located between the inner shell and the outer shell (31), and can scrape off the impurities on the outer surface of the inner shell and push the receiving horizontal plate (345) to slide radially towards the center of the inner shell, forming a state of separation and discharge of impurities and airflow. The bottom of the receiving horizontal plate (345) is provided with a groove, and a guide rod (347) is provided in the groove. The guide rod (347) passes through the straight plate (34), and springs (346) are provided on both sides of the guide rod (347). The scraping assembly (9) includes an annular scraper (93) and a pressure block (95) installed below the annular scraper (93). The pressure block (95) is opposite to the center line of the straight plate (34). The annular scraper (93) and the pressure block (95) descend synchronously. The annular scraper (93) is used to scrape off solid particles from the outer surface of the straight plate (34). The inner and outer surfaces of the straight plate (34) and the area opposite to the upper surface of the receiving horizontal plate (345) are provided with scrapers (348). Both sides of the receiving horizontal plate (345) have slopes, and the bottom surface of the pressure block (95) is a slope structure, so that when the pressure block (95) moves down, it can push the receiving horizontal plate (345), so that the scrapers (348) can scrape off the impurities on the upper surface of the receiving horizontal plate (345), and so that the solid particles scraped off by the pressure block (95) can fall downward.

2. The oily mud and sand waste gas treatment device according to claim 1, characterized in that, The top surface of the outer shell (31) is suspended by a hanger (351) with a top plate (35) and a receiving cavity (352) is opened on the lower end surface of the top plate (35). It also includes a limiting plate (8), which can move upward into the receiving cavity (352) and downward into the straight plate (34) to lock the shape of the inner shell; The top of the outer casing (31) is provided with a cylinder (10) for driving the limit plate (8) to rise and fall.

3. The oily sludge and sand waste gas treatment device according to claim 2, characterized in that, The upper and lower ends of the straight plate (34) are both fixed with a rotating shaft (343), and a first gear (341) is fixed on the rotating shaft (343). A rotating gear ring (344) meshes with the periphery of the multiple first gears (341). A second gear (342) is fixed at the upper end of one of the shafts (343), and the drive member (7) can drive the second gear (342) to rotate.

4. The oily mud and sand waste gas treatment device according to claim 3, characterized in that, The drive component (7) include: A reversing motor (71) is mounted on the top surface of the housing (31), and a reversing gear (72) is fixed at its power output end and used to drive the second gear (342) to rotate.

5. The oily sludge and sand waste gas treatment device according to any one of claims 1-4, characterized in that, The bottom of the outer shell (31) is fixed with a conical head (36), and the inner shell, the top plate (35) and the conical head (36) form a sealed space.

6. The oily sludge and sand waste gas treatment device according to claim 5, characterized in that, The separation tower (3) has two sets of components, and the lower part of the conical head (36) is provided with an exhaust pipe (5). The exhaust pipe (5) includes: Exhaust branch pipe (51), the exhaust branch pipe (51) is located below the conical head (36), the two sets of exhaust branch pipes (51) form a V-shaped structure, the middle part of the exhaust branch pipe (51) has a constriction section (52), the two sets of constriction sections (52) are connected by a connecting suction pipe (53), and the V-tip area of ​​the two sets of constriction sections (52) is provided with an exhaust main pipe (54).

7. The oily sludge and sand waste gas treatment device according to claim 6, characterized in that, An air supply pipe (2) is provided between the filter tower (1) and the separation tower (3). A branch pipe (21) connected to the separation tower (3) is provided on the air supply pipe (2). A solenoid valve (22) is installed on the branch pipe (21).

8. The oily mud and sand waste gas treatment device according to claim 1, characterized in that, The centrifugation mechanism (6) includes: Centrifugal shaft (62) is located inside the inner shell and is coaxial with the inner shell. Centrifugal impeller (61) is fixed at the lower end of the centrifugal shaft (62). The upper ends of the two sets of centrifugal shafts (62) are connected by a belt drive structure (63). A motor (64) for driving one of the centrifugal shafts (62) to rotate is installed on the top of the outer shell (31).

9. A method for treating oily mud and sand-containing waste gas, applicable to the oily mud and sand-containing waste gas treatment device according to any one of claims 1-8, characterized in that, Includes the following steps: Step 1: The waste gas generated during the treatment of oily mud and sand is filtered by the filter tower (1) and then enters the inner shell where it is separated into solid and gas by the centrifugal mechanism (6). The solid particles reach the inner wall of the inner shell due to the centrifugal force and fall onto the surface of the receiving horizontal plate (345). Step 2: After the required separation time, the solenoid valve (22) corresponding to the first inner shell is closed, so that the first inner shell no longer takes in air, while the second inner shell continues to take in air. When the second inner shell exhausts air, a negative pressure is formed in the area of ​​the second contraction section (52) and the clean gas in the first inner shell is sucked away through the connecting suction tube (53), so that the clean gas in the first inner shell is emptied. Step 3: Control cylinder (10) drives limit plate (8) to unlock inner shell and drive drive component (7) to rotate straight plate 180°, so that inner and outer surfaces of inner shell are exchanged. After the exchange is completed, solenoid valve (22) reopens, so that the first separation tower (3) can re-intake air. Step 4: Repeat the actions of the first inner shell in Steps 2 and 3 for the second inner shell, and repeat the actions of the second inner shell in Steps 2 and 3 for the first inner shell. Step 5: Control the action of the scraping component (9) to simultaneously scrape the outer surfaces of the two inner shells, scrape the upper surface of the receiving cross plate (345), and scrape the oil. Step 6: Repeat the actions in steps 2 through 5.

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