A coalescence oil removal device for oilfield sewage treatment

Abstract

The present application relates to sewage oil removal technical field, specifically to a kind of coalescence oil removal device for oilfield sewage treatment, the middle part of processing box is fixedly connected with split body, the front side of split body is equipped with oil removal cavity, the left and right inner walls of oil removal cavity are respectively fixedly connected with along rod, oil removal frame is slidably installed between two along rods, oil removal box is rotatably installed in the inside of oil removal frame, the left and right ends of oil removal box are respectively fixedly connected with plug shafts penetrating oil removal frame side, the outer top end of two plug shafts is respectively fixedly connected with knob, the outside of each plug shaft is equipped with torsion spring between knob and oil removal frame, the left end of two along rods is respectively equipped with rectangular port, the inner wall of two rectangular ports is respectively fixedly connected with blocking rod.The device can automatically complete the functions of floating oil collection, oil discharge and storage, reducing the operation and maintenance cost, without manual fishing during operation, reducing the labor intensity, not easy to cause secondary emulsification of floating oil, improving the efficiency of oilfield sewage treatment.

Description

Technical Field

[0001] This invention relates to the field of wastewater oil removal technology, and more specifically to a coalescing oil removal device for oilfield wastewater treatment. Background Technology

[0002] Oilfields generate large amounts of oily wastewater during extraction and processing. This wastewater contains high concentrations of crude oil and suspended solids. If discharged directly without effective treatment, it will cause serious pollution and damage to soil, water bodies, and the ecological environment. Therefore, the purification and treatment of oily wastewater is an indispensable part of the petroleum industry. Oil-water separation is the core step in wastewater treatment processes. Since produced water often contains a large amount of stable emulsified oil, it is difficult to achieve efficient separation by simply relying on the natural gravity sedimentation due to the density difference between oil and water. Usually, it is necessary to add demulsifiers to the wastewater to cause the dispersed tiny oil droplets to collide with each other and aggregate into larger oil particles, which then quickly float to the water surface to form an oil layer for subsequent mechanical separation.

[0003] Currently, existing technologies for the collection and treatment of floating oil on water surfaces still have limitations. For example, Chinese patent (CN211998934U) discloses an oilfield wastewater treatment device, which includes a tank and a cover plate fixed to the top of the tank. An inclined plate that tilts to the right and downwards is fixed inside the tank. This device uses the agitation of blades to mix, increasing the contact area between the agent and the oilfield wastewater, shortening the mixing time between the agent and the oilfield wastewater, and improving the treatment efficiency of the oilfield wastewater. However, the device is difficult to accurately collect and store the floating oil layer, which reduces the oil removal efficiency of oilfield wastewater and increases the equipment operation and maintenance costs. In addition, manual oil retrieval not only greatly increases the labor intensity of operators, but also the water disturbance caused by retrieval can easily cause secondary emulsification of the floating oil, increasing the difficulty of subsequent oil-water separation and increasing the cost of subsequent oil-water separation. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a coalescence oil removal device for oilfield wastewater treatment, which effectively solves the problems that the device is difficult to accurately collect and store the floating oil layer, reduces the oil removal efficiency of oilfield wastewater, and that the use of manual oil retrieval not only greatly increases the labor intensity of operators, but also that the water disturbance caused by retrieval can easily cause secondary emulsification of the floating oil, increasing the difficulty of subsequent oil-water separation.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A coalescing oil removal device for oilfield wastewater treatment includes a treatment box, a partition fixedly connected to the middle of the treatment box, an oil removal chamber on the front side of the partition, a guide rod fixedly connected to the left and right inner walls of the oil removal chamber, an oil removal frame slidably installed between the two guide rods, an oil removal box rotatably installed inside the oil removal frame, a shaft penetrating the side of the oil removal frame fixedly connected to the left and right ends of the oil removal box, a lever fixedly connected to the outer top of the two shafts, a torsion spring sleeved on the outer side of each shaft between the lever and the oil removal frame, a rectangular opening at the rear end of each guide rod, a blocking rod fixedly connected to the inner wall of each rectangular opening, a power assembly at the upper end of each guide rod, the power assembly and the oil removal frame being driven together, an oil storage chamber inside the partition, an oil inlet at the upper end of the oil storage chamber, guide assemblies at the bottom ends of each guide rod, and lifting assemblies at the left and right ends of the oil removal frame, each lifting assembly installed within a corresponding guide assembly.

[0006] Preferably, the rear side of the segment is provided with a cleaning chamber, a lifting plate is slidably installed inside the cleaning chamber, a sinking shell is fixedly connected to the front end of the lifting plate, a filter screen is slidably installed inside the sinking shell, a plate groove hole is provided at the rear end of the sinking shell, a push plate is installed inside the plate groove hole, the push plate matches the plate groove hole, a telescopic component is installed at the bottom end of the lifting plate, the telescopic end of the telescopic component is connected to the push plate, the segment is provided with a collection chamber located behind the oil storage chamber, an impurity inlet is provided at the upper rear end of the collection chamber, and a driving assembly is provided at the upper end of the sinking shell, the driving assembly and the filter screen are driven together.

[0007] Preferably, the guiding component includes a translation groove, an tilting groove, and a positioning groove. The bottom end of each of the guide rods is fixedly connected to a bonding plate. The side of each bonding plate is provided with a translation groove. The rear end of each translation groove is connected to an tilting groove. The rear end of each tilting groove is connected to a positioning groove.

[0008] Preferably, the lifting assembly includes lifting blocks and guide shafts. Lifting blocks are fixedly connected to the left and right bottom ends of the degreasing rack, and a guide shaft is fixedly connected to the bottom end of each lifting block. The guide shaft is installed in a corresponding translation groove. An overlapping piece located below the degreasing box is fixedly connected to the inner wall of the degreasing rack.

[0009] Preferably, the power assembly includes a power lead screw and a power motor. The power lead screw is rotatably mounted above the guide rod on the left side, and a guide rod is fixedly mounted above the guide rod on the right side. Limit frames are fixedly connected to the left and right sides of the degreasing frame. Sliding blocks are respectively sleeved on the power lead screw and the guide rod. Each sliding block is slidably connected in the corresponding limit frame. A power motor connected to the power lead screw is installed at the front end of the processing box.

[0010] Preferably, the drive assembly includes two sets of drive racks. Drive racks are slidably connected to the left and right ends of the front side of the lifting plate, and the two sets of drive racks are located on both sides of the sinking shell. Reversing gears are rotatably connected to the left and right outer ends of the sinking shell. Each reversing gear meshes with the corresponding drive rack. Two movable racks are fixedly connected to the left and right ends of the filter screen. Each set of movable racks meshes with the corresponding reversing gear. A compression spring is connected to the bottom end of each set of drive racks. A protective cover located below the lifting plate is installed at the lower end of the sinking shell. A rear cover plate is installed inside the top of the impurity removal chamber.

[0011] Preferably, two fastening discs are fixedly connected to the top of the rear cover plate, and two base plates are fixedly connected to the lifting plate. Each fastening disc is fixedly connected to the bottom of the processing box with a threaded rod located inside the base plate. Multiple friction balls are rotatably connected to the top surface of each base plate. A stirring disc is sleeved on each threaded rod. A ball is rotatably connected inside each stirring disc. Each ball is installed in a threaded groove on the outside of the corresponding threaded rod. A top plate that contacts the friction balls is fixedly connected to the bottom surface of each stirring disc. A lifting motor is fixedly connected to the top of the rear cover plate, and a lifting screw that is threadedly connected to the lifting plate is installed on the bottom shaft of the lifting motor.

[0012] Preferably, the top of the rear cover plate is provided with a feeding port and a rear observation plate, the top of the lifting plate is fixedly connected with a touch rod, a reinforcing rod is connected between the tops of the two sets of driving racks, and a limit bar is fixedly connected to the inner wall of the sinking shell.

[0013] Preferably, a front cover plate is installed at the upper end of the oil removal chamber, the front cover plate is provided with a chemical inlet and a front observation plate, multiple stirring rods are provided at the bottom of the oil removal frame, a liquid extraction pipe is provided between the oil removal chamber and the impurity removal chamber, a compressor is installed inside the impurity removal chamber located below the lifting plate, a gas collecting box is installed inside the oil removal chamber, an exhaust pipe is connected between the compressor and the gas collecting box, multiple exhaust pipes are connected to the side of the gas collecting box, compression springs are connected to the front and rear ends of the compressor, and an air inlet pipe is connected to the front end of the compressor.

[0014] Preferably, the right side of the collecting chamber and the oil storage chamber are respectively provided with cleaning ports.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Through the coordinated use of components such as the oil removal box, the actuating block, and the blocking rod, the system can automatically complete the functions of oil collection, oil discharge, and storage, reducing operation and maintenance costs. Furthermore, it eliminates the need for manual retrieval during operation, making it less prone to secondary emulsification of oil, reducing the intensity of manual operation and the difficulty of oil-water separation, and improving safety and the efficiency of oilfield wastewater treatment.

[0016] 2. By using the lifting plate and filter screen together, the impurities in oilfield wastewater can be filtered, extending the service life of related equipment. Due to the linkage between the telescopic parts and the push plate, solid impurities can be quickly scraped off and sent into the collection chamber. No manual cleaning of impurities is required throughout the process, realizing automated impurity removal for oilfield wastewater.

[0017] 3. Through the coordinated use of the power motor, power screw and guide rod, and by using the trajectory guidance of the translation groove, tilting groove and positioning groove, the oil removal box can automatically collect oil and lift. Furthermore, through the corresponding structural limit and the storage and release of the torsion spring, the oil removal box can be automatically flipped to complete the pouring of floating oil, thereby realizing the collection, lifting and pouring of floating oil on the liquid surface, effectively improving the efficiency of floating oil recovery.

[0018] 4. Through the cooperation of components such as the chassis, friction beads, top plate, stirring plate, pressure spring, ball bearings, and threaded groove, the sewage and flocculant are fully stirred and mixed, ensuring that the flocculant and sewage reach a mixed state in a short time, thereby improving the efficiency of subsequent solid-liquid separation.

[0019] 5. Through the cooperation between components such as the compressor, air collection box, and exhaust pipe, microbubbles can be automatically generated. During the rising process of the bubbles, they adsorb and carry tiny oil droplets, which greatly shortens the time required for oil-water separation and improves the oil removal efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 For the present invention Figure 1 Cross-sectional view; Figure 3 This is a schematic diagram of the processing box structure of the present invention; Figure 4 This is a schematic diagram of the oil removal chamber and impurity removal chamber of the present invention; Figure 5 This is a schematic diagram showing the positions of the oil removal rack and oil removal box of the present invention; Figure 6 This is a schematic diagram of the lifting plate structure of the present invention; Figure 7 This is a schematic diagram of the translation groove, tilting groove, and positioning groove of the present invention; Figure 8 This is a schematic diagram of the sunken shell structure of the present invention; Figure 9 This is a schematic diagram showing the position of the stirring rod in this invention; Figure 10 This is a schematic cross-sectional view of the mixing plate of the present invention; Figure 11 This is a schematic diagram of the oil storage chamber and the collection chamber of the present invention; Figure 12 For the present invention Figure 4 Enlarged diagram of point A in the diagram; Figure 13 For the present invention Figure 5 Enlarged diagram of point B in the image.

[0021] Markings in the diagram: 1. Processing box; 2. Divider; 3. Oil removal chamber; 4. Sliding rod; 5. Oil removal rack; 6. Oil removal box; 7. Insert shaft; 8. Actuating block; 9. Torsion spring; 10. Rectangular opening; 11. Blocking rod; 12. Oil storage chamber; 13. Oil inlet; 14. Impurity removal chamber; 15. Lifting plate; 16. Sinking shell; 17. Filter screen; 18. Plate slot hole; 19. Push plate; 20. Telescopic component; 21. Collection chamber; 22. Impurity inlet; 23. Horizontal groove; 24. Inclined groove; 25. Positioning groove; 26. Adhesive plate; 27. Guide shaft; 28. Overlapping piece; 29. ​​Power screw; 30. Guide rod; 31. Limiting frame; 32. Sliding block; 33. Power motor; 34. Drive gear 35. Reversing gear; 36. Moving rack; 37. Compression spring; 38. Protective cover; 39. Rear cover plate; 40. Fastening disc; 41. Chassis; 42. Friction ball; 43. Stirring disc; 44. Ball bearing; 45. Top plate; 46. Lifting motor; 47. Lifting screw; 48. Feeding port; 49. Rear observation plate; 50. Contact rod; 51. Reinforcing rod; 52. Limit bar; 53. Front cover plate; 54. Agent port; 55. Front observation plate; 56. Stirring rod; 57. Liquid extraction pipe; 58. Compressor; 59. Gas collection box; 60. Exhaust pipe; 61. Exhaust stack; 62. Compression spring; 63. Air inlet pipe; 65. Cleaning port; 66. Lifting block; 67. Threaded rod. Detailed Implementation

[0022] The following reference Figures 1 to 13 The various embodiments of the present invention will be described in detail. Those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0023] A coalescing oil removal device for oilfield wastewater treatment, such as Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 12 , Figure 13 As shown, the treatment box 1 has a rectangular structure and a port at the top. It is made of corrosion-resistant and high-pressure-resistant stainless steel, which can effectively extend its service life. The middle inner wall of the treatment box 1 is sealed and fixedly connected to the partition body 2. The front side of the partition body is the oil removal chamber 3. The left and right inner walls of the oil removal chamber 3 are respectively horizontally fixedly connected to the guide rods 4. The two guide rods 4 are set near the top port of the treatment box 1. An oil removal frame 5 is installed between the two guide rods 4. It can move freely back and forth along the two guide rods 4. The oil removal frame 5 has a "U" shaped shell structure and is set through from top to bottom. An oil removal box 6 is rotatably installed between the left and right inner walls of the oil removal frame 5. It is a box structure with an oil removal inlet at the left end, which can collect floating coalesced oil droplets. Positioning holes are provided on the left and right rear walls of the oil removal frame 5. Insert shafts 7 are fixedly connected to the left and right ends of the oil removal box 6. The two insert shafts 7 are rotatably installed in the corresponding positioning holes, so that the oil removal box 6 can rotate inside the oil removal frame 5. A toggle block 8 is fixedly connected to the outer top of each insert shaft 7. The toggle block 8 is located on the outside of the oil removal frame 5. A torsion spring 9 is coaxially sleeved on the outside of each insert shaft 7 between the toggle block 8 and the oil removal frame 5. One end of the torsion spring 9 is fixedly connected to the insert shaft 7, and the other end is fixedly connected to the outer wall of the oil removal frame 5. Under normal conditions, the toggle block 8 is in a downward vertical state. Rectangular openings 10 are provided at the rear ends of the two trailing rods 4, close to the dividing body 2. A blocking rod 11 is fixedly connected to the rear inner wall of the two rectangular openings 10. The length of the blocking rod 11 is half the length of the rectangular opening 10, which can precisely cooperate with the toggle block 8 to realize the flipping and oil guiding of the oil removal box 6. The upper ends of the two lateral rods 4 are equipped with power components, which are driven by the oil removal frame 5, so that the oil removal frame 5 can move back and forth at a uniform speed. The oil removal box 6 can remove floating oil droplets. The interior of the dividing body 2 is equipped with an oil storage chamber 12 with an open top, which is used to temporarily store the separated oil. The top port is equipped with a first sealing cap. The first sealing cap can be removed to clean or observe the internal condition of the oil storage chamber 12. The upper end of the front wall of the oil storage chamber 12 is provided with an oil inlet 13 that communicates with the oil removal chamber 3. The bottom surface of the two lateral rods 4 is flush with the bottom surface of the oil inlet 13. An extension plate is fixedly connected to the front side of the bottom wall of the oil inlet 13. The bottom ends of the two lateral rods 4 are respectively equipped with guide components. The left and right ends of the oil removal frame 5 are respectively equipped with lifting components. Each lifting component is installed inside the corresponding guide component. During use, personnel add an appropriate amount of oilfield wastewater to the oil removal chamber 3, with the wastewater level slightly below the bottom of the extension plate. At this time, the inlet of the oil removal box 6 is submerged below the water surface. Then, a certain amount of demulsifier is added to the wastewater, driving the matching stirring components to fully mix the wastewater and the demulsifier. The demulsifier breaks the oil-water emulsion structure, and the dispersed fine oil droplets in the water aggregate with each other. After the volume increases, they gradually float to the surface of the wastewater. After the mixing reaction is completed, the power component drives the oil removal frame 5 to move backward along the guide component. During the backward movement of the oil removal box 6, the floating oil on the liquid surface can be collected into the box body. When the lifting assembly drives the oil removal frame 5 and the oil removal box 6 to rise to a suitable height, the insert shaft 7, the toggle block 8, and the torsion spring 9 move synchronously into the rectangular opening 10, and the toggle block 8 contacts the corresponding blocking rod 11, and the bottom end face of the oil removal frame 5 moves to the top surface of the extension plate. Due to the continued movement of the driving assembly, the two toggle blocks 8 are blocked by the blocking rod 11 respectively, driving the insert shaft 7 to rotate synchronously, and the torsion spring 9 is twisted and stores power. The oil outlet on the rear side of the oil removal box 6 flips backward and aligns with the oil inlet 13. The floating oil in the oil removal box 6 is poured into the oil storage chamber 12, completing the centralized recovery of the floating oil. After the floating oil is poured out, the drive component runs in reverse and drives the oil removal frame 5 to reset forward along the guide component. The spring force is released by the torsion spring 9, and the toggle block 8 and the oil removal box 6 rotate back to reset synchronously. Then the lifting component drives the oil removal frame 5 back to the initial position, and the oil removal box 6 is submerged in the water again to prepare for the next round of oil removal work. By adding an appropriate amount of demulsifier to the oil removal chamber 3, the dispersed oil droplets in the wastewater can be quickly aggregated, causing large oil particles to float to the surface of the water. Then, through the cooperation of components such as the oil removal box 6, the actuating block 8, and the blocking rod 11, the functions of collecting, discharging, and storing floating oil can be completed automatically. Moreover, no manual retrieval is required during operation, reducing the intensity of manual operation, improving treatment efficiency and automation, and further enhancing the efficiency of oilfield wastewater treatment.

[0024] like Figure 2 , Figure 4 , Figure 6 , Figure 11As shown, a cleaning chamber 14 is provided on the rear side of the partition 2, and a lifting plate 15 that slides up and down is installed inside the chamber. The edge of the lifting plate 15 is in sealed sliding contact with the inner wall of the cleaning chamber 14 and the inner wall of the partition 2. A rectangular cavity is provided at the front end of the lifting plate 15, and a downwardly extending sinking shell 16 is fixedly connected to the inner wall of the cavity. A filter screen 17 that slides up and down is installed on the inner wall of the sinking shell 16. The filter screen 17 can be replaced or cleaned as needed. The rear end face of the sinking shell 16 has an opening located below the lifting plate 15. The plate slot 18 is a long strip structure and is located above the filter screen 17. A push plate 19 is slidably installed inside the plate slot 18. The length of the push plate 19 matches the filter screen 17, and the outer contour of the push plate 19 matches the inner wall shape of the plate slot 18. A telescopic component 20 is fixedly installed on the bottom end face of the lifting plate 15 (the telescopic component 20 is such as a hydraulic cylinder and is electrically connected to the controller and power supply). The front telescopic end of the telescopic component 20 is fixedly connected to the middle part of the push plate 19. In addition, the interior of the dividing body 2 is provided with a collection chamber 21 with an opening at the top. A second sealing cover is installed at the top port. The collection chamber 21 is located on the rear side of the oil storage chamber 12. The interior of the collection chamber 21 can be cleaned or observed by removing the second sealing cover. The collection chamber 21 is used to collect the impurities that have been cleaned out. An inlet 22 communicating with the impurity removal chamber 14 is opened at the upper end of the rear wall of the collection chamber 21. A drive assembly is provided at the upper end of the sink shell 16. The drive assembly and the filter screen 17 are driven together. The lifting plate 15 is lowered to a suitable position. Then, the personnel pass the wastewater after the oil spill is treated into the impurity removal chamber 14 and it falls onto the lifting plate 15. The wastewater flows along the plate surface into the filter screen 17 and gathers into the cavity below the lifting plate 15. When the liquid level is close to the impurity inlet 22, the water injection is stopped. During the static process, impurities in the sewage gradually settle onto the lifting plate 15. Then, the lifting plate 15 is driven to move upward along the inner wall of the impurity removal chamber 14. During the movement of the filter screen 17, solid impurities in the sewage are intercepted and filtered. During the rise of the lifting plate 15, the drive component drives the filter screen 17 to rise to the middle position with the impurity inlet 22. The lifting plate 15 stops moving. At this time, the controller starts the movement of the telescopic component 20. Its telescopic end extends and pushes the push plate 19 forward. The push plate 19 pushes the solid impurities intercepted on the surface of the filter screen 17 into the impurity inlet 22 and then falls into the interior of the collection chamber 21, thereby achieving the filtration treatment of impurities in the oilfield sewage. After the impurities on the surface of the filter screen 17 are cleaned, the controller drives the telescopic component 20 to retract and reset, the push plate 19 retracts into the plate slot hole 18, and then drives the lifting plate 15 to fall back to the initial position along the inner wall of the impurity removal chamber 14, and the drive assembly also lowers the filter screen 17 to the initial position, and the filtered sewage can be discharged to a suitable external location. By combining the lifting plate 15 with the filter screen 17, the impurities in the oilfield wastewater can be filtered, extending the service life of related equipment. Due to the linkage between the telescopic component 20 and the push plate 19, solid impurities on the filter screen 17 can be automatically scraped off and sent into the collection chamber 21. No manual cleaning is required throughout the process, realizing automated impurity removal of oilfield wastewater.

[0025] like Figure 5 , Figure 7 , Figure 13 As shown, each guide component includes a translation groove 23, an inclined groove 24, and a positioning groove 25. A bonding plate 26 is fixedly connected to the bottom surface of each guide rod 4, and the side of the bonding plate 26 is fixedly connected to the inner wall of the degreasing chamber 3. A horizontal translation groove 23 is provided on the other side of the bonding plate 26, and its rear end is connected to an upwardly inclined groove 24. The rear end of the inclined groove 24 is connected to a positioning groove 25. The inclined groove 24 and the positioning groove 25 are provided on the bonding plate 26. The rear end of the positioning groove 25 is correspondingly positioned to the front end of the rectangular opening 10. (The structures of the translation groove 23, inclined groove 24, and positioning groove 25 are as follows...) Figure 7 As shown), each positioning groove 25 is arranged parallel to the translation groove 23 on the same side. A pressing rod is slidably installed at the rear end of each positioning groove 25. A trigger is installed in the rear end of the bonding plate 26. The trigger is connected to the controller through a wire.

[0026] like Figure 4 , Figure 5 , Figure 9 , Figure 12 As shown, the lifting assembly includes lifting blocks 66 and guide shafts 27. Lifting blocks 66 are fixedly installed on the left and right bottom ends of the degreasing rack 5, respectively. Each lifting block 66 has an outwardly extending guide shaft 27 fixedly connected to its bottom surface. The guide shaft 27 is vertically fixed to the lifting block 66. The top end of each guide shaft 27 is slidably installed in the corresponding translation groove 23, and can slide back and forth along the trajectory of the translation groove 23. The two guide shafts 27 provide stable guiding support for the degreasing rack 5. An overlapping piece 28 is fixedly connected to the inner bottom wall of the degreasing rack 5. Under normal conditions, the bottom of the degreasing box 6 is in contact with the overlapping piece 28, providing auxiliary support.

[0027] like Figure 1 , Figure 5 , Figure 7 , Figure 12 , Figure 13As shown, the power assembly includes a power screw 29 and a power motor 33. The power screw 29 is located above the left-side guide rod 4. The rear end of the power screw 29 is rotatably connected to the dividing body 2, and the front end is rotatably connected to the inner wall of the processing box 1. The guide rod 30 is located above the right-side guide rod 4. The rear end of the guide rod 30 is fixedly connected to the dividing body 2, and the front end is fixedly connected to the inner wall of the processing box 1. The power screw 29 and the guide rod 30 are on the same horizontal plane. Limit frames 31 are fixedly connected to the left and right outer walls of the degreasing rack 5, respectively. A slider 32 is threadedly connected to the power screw 29. One end of the slider 32 is slidably connected to the adjacent limit frame 31. A slider body 32 is slidably sleeved on the guide rod 30. One end of the slider body 32 is slidably connected to the adjacent limiting frame 31. The slider body 32 has a rectangular structure and can only slide up and down along the corresponding limiting frame 31. The bottom surfaces of the two slider bodies 32 are slidably connected to the top surface of the corresponding guide rod 4. A power motor 33 is fixedly installed on the front end face of the processing box 1. The rotating shaft of the power motor 33 is coaxially fixedly connected to the power lead screw 29. The power motor 33 is a forward and reverse motor and is connected to the controller through wires. The controller is connected to the power supply. When in use, the controller turns on the power motor 33 to start running, the power screw 29 rotates synchronously, the two sliders 32 slide backward against the top surface of their respective corresponding guide rods 4, and move backward synchronously under the guidance of the guide rod 30. At the same time, the two guide shafts 27 move backward synchronously along their respective translation grooves 23. During this process, the oil removal rack 5 moves backward synchronously to collect the floating oil on the liquid surface into the oil removal box 6. When the guide shaft 27 slides to the rear end of the translation groove 23, it will be guided into the interior of the tilt groove 24. At this time, the limit frame 31 slides against the outside of the slider body 32, and the degreasing frame 5 is lifted upward. Then, the insertion shaft 7, the toggle block 8, and the torsion spring 9 enter the corresponding rectangular opening 10. The two guide shafts 27 are guided into the positioning groove 25 respectively and continue to move backward until the bottom surface of the degreasing frame 5 moves above the extension plate, completing the lifting of the degreasing box 6. As the power motor 33 continues to rotate, the bottom surface of the oil removal box 6 slides against the top surface of the extension plate. At this time, the toggle block 8 is blocked by the blocking rod 11, which drives the insertion shaft 7 to rotate synchronously. The torsion spring 9 twists and stores power accordingly. The oil outlet on the rear side of the oil removal box 6 flips backward and aligns with the oil inlet 13. At the same time, the squeezing rod in the positioning groove 25 is squeezed and slid by the guide shaft 27 and the trigger is activated. The signal is transmitted to the controller, which then cuts off the power to the power motor 33. The oil removal frame 5 stops moving. At this time, the floating oil in the oil removal box 6 flows into the oil storage chamber 12, completing the centralized recovery of the oil. After the floating oil is poured out, the personnel control the power motor 33 to reverse through the controller. The slider 32 moves forward synchronously along the power screw 29 and the guide rod 30. The guide shaft 27 disengages from the extrusion rod and slides back to its original position along the corresponding positioning groove 25, tilting groove 24 and translation groove 23 in sequence. During this process, the torsion spring 9 releases its elastic force, the actuating block 8 drives the oil removal box 6 to rotate back to its initial state, and the oil removal frame 5 carries the oil removal box 6 to sink below the liquid surface again, and enters the cycle work again. Through the cooperation between the power motor 33, the power lead screw 29 and the guide rod 30, and with the trajectory guidance of the translation groove 23, the tilting groove 24 and the positioning groove 25, the oil removal box 6 can automatically collect oil and lift. Through the corresponding structural limit and the storage and release of the torsion spring 9, the oil removal box 6 can be automatically flipped to complete the pouring of floating oil, realizing the collection, lifting and pouring of floating oil on the liquid surface, effectively improving the efficiency of floating oil recovery, greatly reducing the cost of manual operation, making operation more convenient and improving safety.

[0028] like Figure 1 , Figure 6 , Figure 11 As shown, the drive assembly includes two sets of drive racks 34, each set of drive racks 34 having an inverted "U" shaped structure. Two positioning holes are respectively opened on the left and right ends of the front side of the lifting plate 15. Each set of drive racks 34 is slidably installed in the corresponding positioning hole and is located on the left and right outer sides of the lower shell 16. The two sets of drive racks 34 perform linear reciprocating motion in the vertical direction without deviation. Two elongated openings are respectively provided on the left and right walls of the lower shell 16. A positioning frame is fixedly connected to the outer side of each elongated opening. A reversing gear 35 is rotatably connected to each positioning frame. Each reversing gear 35 is meshed with the corresponding drive rack 34. The filter screen 17 is horizontally set inside the lower shell 16. Two vertically moving racks 36 are fixedly connected to the left and right top ends of the filter screen 17. Each moving rack 36 is meshed with the corresponding reversing gear 35. Two compression springs 37 are fixedly connected to the bottom of each set of drive racks 34. A contact plate is fixedly connected between the bottom of each compression spring 37 and the outer wall of the sinking shell 16. A protective cover 38 located below the lifting plate 15 is fitted on the outside of the sinking shell 16. The protective cover 38 is sealed and fixedly connected to the lifting plate 15 and the sinking shell 16, thereby covering the compression springs 37, reversing gears 35, contact plates, positioning frames and the bottom of drive racks 34, preventing impurities from affecting the use of each component, and improving safety and durability. The top port of the impurity removal chamber 14 is fixedly connected to the rear cover plate 39 by bolts and is located above the impurity inlet 22, which plays a sealing and protective role. A touch rod 50 is fixedly connected to the top surface of the lifting plate 15. Under normal conditions, due to the force of the compression spring 37, the tops of the two sets of drive racks 34 are higher than the tops of the contact rod 50, and a reinforcing rod 51 is fixedly connected between the tops of the two sets of drive racks 34, which further enhances the stability of the two sets of drive racks 34. During the impurity removal stage, the lifting plate 15 moves upward along the inner wall of the impurity removal chamber 14. When the top of the two sets of drive racks 34 abuts against the bottom of the rear cover plate 39, they are blocked by the force. The two sets of drive racks 34 move downward and mesh with the corresponding reversing gears 35 to rotate, and simultaneously compress the spring 37. Under the transmission cooperation, the four moving racks 36 simultaneously drive the filter screen 17 to rise. When the filter screen 17 is raised to the middle position of the impurity inlet 22, the trigger is set at the top of the touch rod 50. The trigger touches the bottom surface of the rear cover plate 39. The trigger sends a trigger signal to the controller, and the subsequent corresponding components stop working. The lifting plate 15 then stops moving. Subsequently, the controller drives the telescopic component 20 to extend and push the push plate 19 to move forward, pushing the solid impurities trapped on the surface of the filter screen 17 into the collection chamber 21 through the impurity inlet 22, thus completing the impurity collection. After the impurities are cleaned, the telescopic component 20 is retracted by the controller, which drives the push plate 19 back into the plate slot 18. Then, the subsequent components are activated, driving the lifting plate 15 to move downward along the inner wall of the impurity removal chamber 14. Under the elastic force of the four compression springs 37, the two sets of drive racks 34 move upward synchronously and mesh with the reversing gear 35 to rotate in opposite directions. The four moving racks 36 drive the filter screen 17 to descend to the initial position, and the tops of the two sets of drive racks 34 move again to above the touch rod 50. The lifting plate 15 and the two sets of drive racks 34 are then fully reset, ready for the next operation. By precisely limiting the position of the touch rod 50 and the rear cover plate 39, the filter screen 17 can be accurately lifted to the middle position of the impurity inlet 22. With the translational pushing of the push plate 19, the intercepted solid impurities can be pushed into the collection chamber 21, effectively avoiding the residue and accumulation of impurities on the surface of the filter screen 17, and greatly improving water quality. Due to the use of mechanical linkage, the failure rate and maintenance cost of the electrical control system are reduced.

[0029] like Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 10As shown, two fastening discs 40 are fixedly connected to the top of the rear cover plate 39, and two base plates 41 are fixedly connected to the top surface of the lifting plate 15. Each fastening disc 40 is concentrically corresponding to the base plate 41 directly above it, and the middle part of each of the two base plates 41 is provided with a through hole running vertically through the top and bottom. Threaded rods 67 are fixedly connected between the bottom ends of the two fastening discs 40 and the bottom end of the processing box 1, respectively. Each threaded rod 67 is installed in the corresponding through hole, allowing the lifting plate 15 to move freely up and down. The outer side of each threaded rod 67 is provided with threaded grooves with large spacing. Six friction balls 42 are evenly rotatably connected to the top surface of each base plate 41. A stirring disc 43 is sleeved on the outer side of each threaded rod 67, and a ball bearing 44 is rotatably connected inside it. Multiple stirring blades are fixedly connected to the edge of the stirring disc 43, and each ball bearing 44 is rotatably installed in the corresponding threaded groove, allowing the lifting plate 15 to move freely up and down. The ball bearing 44 rolls along the threaded groove without self-locking. A top plate 45 is fixedly connected to the bottom surface of each mixing plate 43. The top plate 45 is sleeved on the outside of the threaded rod 67. A circular groove is provided on the bottom surface of each top plate 45. A compression spring is sleeved on the outside of each threaded rod 67. The top of the compression spring abuts against the bottom surface of the rear cover plate 39, and the bottom end is rotatably connected to the top surface of the corresponding mixing plate 43, so that each friction ball 42 is tightly installed in the corresponding circular groove. A forward and reverse reversible lifting motor 46 is fixed to the top of the rear cover plate 39 and is connected to the controller through wires. A lifting screw 47 is rotatably connected to the bottom surface of the processing box 1. The lifting plate 15 is threadedly connected to the lifting screw 47 to form a threaded fit. The two threaded rods 67 and the lifting screw 47 do not affect each other's movement. The bottom shaft of the lifting motor 46 is coaxially fixedly connected to the top of the lifting screw 47.

[0030] like Figure 1 , Figure 4 , Figure 6 , Figure 8 As shown, the rear top of the rear cover plate 39 is provided with a feeding port 48 for adding the agent. The front top of the rear cover plate 39 is detachably provided with a rear observation plate 49 for observing the condition inside the impurity removal chamber 14. The bottom inner side of the sinking shell 16 is fixedly connected with a limit strip 52, which serves to limit the position of the filter screen 17.

[0031] After the oil removal chamber 3 has completed the oil removal process, the pumping assembly pumps the wastewater from the oil removal chamber 3 into the impurity removal chamber 14 and onto the lifting plate 15. When the wastewater level reaches the preset height, the water intake stops. Then, a certain amount of material, such as flocculant, is added into the impurity removal chamber 14 through the feeding port 48. Next, the controller starts the lifting motor 46, which drives the lifting screw 47 to rotate, thereby driving the lifting plate 15 and the corresponding components to rise as a whole. During the rising process, the two base plates 41 push the top plate 45 and the mixing plate 43 to rise synchronously with the friction balls 42, and drive the compression spring to compress and deform. The friction balls 42 roll in the circular groove. At the same time, the balls 44 roll along the threaded groove and drive the two mixing plates 43 to rotate around the corresponding threaded rod 67, so that the wastewater and flocculant are fully mixed. When the lifting plate 15 rises to the set position, the trigger at the top of the touch rod 50 touches the bottom surface of the rear cover plate 39. The trigger sends a trigger signal to the controller, starting the lifting motor 46 to reverse. The lifting screw 47 drives the lifting plate 15 and the corresponding components to descend as a whole. During the descent, the compressed clamping spring releases its elasticity, pushing the chassis 41 and the mixing plate 43 to descend. The friction balls 42 roll in the opposite direction in the circular groove. At the same time, the balls 44 roll in the opposite direction along the threaded groove, driving the corresponding mixing plate 43 to rotate in the opposite direction around the threaded rod 67, so that the sewage and flocculant are stirred and mixed again, ensuring that the flocculant and sewage reach a mixed state in a short time. Finally, it descends to the appropriate position. The device utilizes the up-and-down movement of the lifting plate 15 to cause the mixing disc 43 to rotate in both directions, which greatly promotes the mixing speed of flocculant and sewage and improves the efficiency of subsequent solid-liquid separation. During the stagnant process of wastewater, the flocculant agglomerates tiny particles in the water into larger flocs, causing them to settle onto the lifting plate 15. Then, the lifting motor 46 is started to rotate, and the lifting plate 15 moves upward along the inner wall of the impurity removal chamber 14. The wastewater flows into the filter screen 17 and enters the cavity below the lifting plate 15. At the same time, the filter screen 17 intercepts and filters the larger floc particles, and then the particles are cleaned into the collection chamber 21 by corresponding components, achieving the effect of solid-liquid separation. After treatment, the wastewater in the impurity removal chamber 14 can be discharged to a suitable place for reuse through the valve, improving the wastewater utilization rate.

[0032] like Figure 1 , Figure 4 , Figure 7 , Figure 9As shown, the top port of the oil removal chamber 3 is fixedly connected to a front cover plate 53 by bolts. The rear cover plate 39 and the front cover plate 53 are on the same plane. The front top of the front cover plate 53 is provided with a chemical inlet 54 for adding demulsifier and oilfield wastewater. The rear top of the front cover plate 53 is detachably provided with a front observation plate 55 for observing the inside of the oil removal chamber 3. Multiple stirring rods 56 are evenly fixedly installed at the bottom of the oil removal frame 5. During the back-and-forth movement of the oil removal frame 5, the stirring rods 56 can drive... Wastewater and demulsifier are thoroughly mixed. A suction pipe 57 is fixedly connected inside the oil removal chamber 3. One end of the suction pipe 57 is close to the bottom of the oil removal chamber 3, and the other end passes through the front cover plate 53 and the rear cover plate 39 and is located inside the impurity removal chamber 14, flush with the bottom of the rear cover plate 39. A water pump that works with the suction pipe 57 is fixedly installed on the outer side of the treatment tank 1 and is connected to the controller. This pump can draw wastewater from inside the oil removal chamber 3 into the impurity removal chamber 14, enabling rapid wastewater replacement. The impurity removal chamber 14... A compression component 58 (such as a compression airbag or other suitable airbag) is fixedly installed on the inner bottom wall below the lifting plate 15. A gas collection box 59 with an internal cavity is fixedly installed at the inner bottom of the oil removal chamber 3. The air outlet end of the compression component 58 and the air inlet end of the gas collection box 59 are respectively sealed and penetrate to the outside of the processing box 1. An exhaust pipe 60 is sealed and fixedly connected between the air outlet port and the air inlet port. A front one-way valve is installed in each end of the exhaust pipe 60. Multiple exhaust pipes 61 are evenly fixedly connected to the side wall of the gas collection box 59. The exhaust pipes 61 are located below the stirring rod 56 and do not affect each other. Each exhaust pipe 61 has an exhaust hole evenly provided at the top. Compression springs 62 are fixedly connected to the front and rear top ends of the compression component 58. The bottom end of the compression springs 62 is fixedly connected to the inner wall of the impurity removal chamber 14. An air inlet pipe 63 is fixedly connected to the front end of the compression component 58. The air inlet pipe 63 is sealed and penetrates to the outside of the processing box 1. A rear one-way valve is provided on the air inlet pipe 63. When the liquid in the impurity removal chamber 14 is mixed and stirred, the lifting motor 46 is started. The corresponding components drive the lifting plate 15 to move downward and squeeze the compression component 58. At this time, the gas inside the compression component 58 is compressed and causes the two front one-way valves to open synchronously. The rear one-way valve remains closed, and the gas enters the gas collection box 59 and is diverted to the exhaust pipe 61. It is discharged in the form of tiny bubbles through the exhaust hole. During the process of the bubbles rising, they can effectively adsorb tiny oil droplets in the sewage, thereby accelerating the oil-water separation efficiency and causing the oil droplets to rise rapidly to the surface of the sewage with the bubbles. Because a trigger is installed at the bottom of the protective cover 38, when the trigger comes into contact with the bottom wall of the impurity removal chamber 14, the trigger sends a trigger signal to the controller. The controller starts the lifting motor 46 to reverse. During the rotation of the lifting screw 47, the lifting plate 15 is driven to reset upward. Under the reset force of the two compression springs 62, the rear one-way valve opens and outside air is drawn into the inner cavity of the compressor 58. At the same time, the two front one-way valves remain closed, and the compressor 58 gradually springs back to the initial position, completing the cycle of gas discharge and air intake inside the compressor 58, ready for the next use. (It should be noted that the speed and start / stop of the booster motor 46 can be adjusted as needed, and a waterproof trigger can be selected.) Through the cooperation of various components, wastewater can be quickly mixed, and microbubbles can be automatically generated. As the bubbles rise, they adsorb and carry tiny oil droplets, which greatly shortens the time required for oil-water separation and improves oil removal efficiency.

[0033] like Figure 3 As shown, the right ends of the collection chamber 21 and the degreasing chamber 3 are respectively fixedly connected to cleaning ports 65. Valves are installed in the two cleaning ports 65 respectively. The corresponding components can be used to clean the substances inside the collection chamber 21 and the degreasing chamber 3, thereby reducing environmental pollution.

[0034] It should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed installation, detachable connection, or integral connection; they can refer to mechanical connection or electrical connection; they can refer to direct connection or indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A coalescing oil removal device for oilfield wastewater treatment, comprising a treatment tank (1), characterized in that, A partition (2) is fixedly connected to the middle of the processing box (1). An oil removal chamber (3) is provided on the front side of the partition (2). A guide rod (4) is fixedly connected to the left and right inner walls of the oil removal chamber (3). An oil removal frame (5) is slidably installed between the two guide rods (4). An oil removal box (6) is rotatably installed inside the oil removal frame (5). Insert shafts (7) penetrating the side of the oil removal frame (5) are fixedly connected to the left and right ends of the oil removal box (6). A toggle block (8) is fixedly connected to the outer top of the two insert shafts (7). A toggle block (8) is sleeved on the outer side of each insert shaft (7) between the toggle block (8) and the oil removal frame (5). The torsion spring (9) between the two longitudinal rods (4) is provided with a rectangular opening (10) at the rear end of each of the two longitudinal rods (4). The inner walls of the two rectangular openings (10) are respectively fixedly connected with a blocking rod (11). The upper end of the two longitudinal rods (4) is provided with a power assembly. The power assembly and the oil removal frame (5) are driven together. The interior of the dividing body (2) is provided with an oil storage chamber (12). The upper end of the oil storage chamber (12) is provided with an oil inlet (13). The bottom end of the two longitudinal rods (4) is provided with a guide assembly. The left and right ends of the oil removal frame (5) are respectively provided with lifting assemblies. Each lifting assembly is installed in the corresponding guide assembly.

2. The coalescing oil removal device for oilfield wastewater treatment according to claim 1, characterized in that, The rear side of the segment (2) is provided with a cleaning chamber (14). A lifting plate (15) is slidably installed inside the cleaning chamber (14). A sinking shell (16) is fixedly connected to the front end of the lifting plate (15). A filter screen (17) is slidably installed inside the sinking shell (16). A plate groove hole (18) is provided at the rear end of the sinking shell (16). A push plate (19) is installed inside the plate groove hole (18). The push plate (19) matches the plate groove hole (18). A telescopic component (20) is installed at the bottom end of the lifting plate (15). The telescopic end of the telescopic component (20) is connected to the push plate (19). The interior of the segment (2) is provided with a collection chamber (21) located behind the oil storage chamber (12). An inlet (22) is provided at the upper rear end of the collection chamber (21). A driving assembly is provided at the upper end of the sinking shell (16). The driving assembly and the filter screen (17) are driven together.

3. The coalescing oil removal device for oilfield wastewater treatment according to claim 1, characterized in that, The guiding component includes a translation groove (23), an tilting groove (24), and a positioning groove (25). Each of the following rods (4) has a bonding plate (26) fixedly connected to its bottom end. Each bonding plate (26) has a translation groove (23) on its side. Each translation groove (23) has a tilting groove (24) connected to its rear end. Each tilting groove (24) has a positioning groove (25) connected to its rear end.

4. The coalescing oil removal device for oilfield wastewater treatment according to claim 3, characterized in that, The lifting assembly includes a lifting block (66) and a guide shaft (27). The left and right bottom ends of the degreasing rack (5) are respectively fixedly connected to the lifting block (66). The bottom end of each lifting block (66) is fixedly connected to the guide shaft (27), and the guide shaft (27) is installed in the corresponding translation groove (23). The inner wall of the degreasing rack (5) is fixedly connected to the overlapping piece (28) located below the degreasing box (6).

5. The coalescing oil removal device for oilfield wastewater treatment according to claim 1, characterized in that, The power assembly includes a power screw (29) and a power motor (33). The power screw (29) is rotatably mounted above the left-side guide rod (4), and a guide rod (30) is fixedly mounted above the right-side guide rod (4). Limiting frames (31) are fixedly connected to the left and right sides of the degreasing frame (5). Sliding blocks (32) are respectively mounted on the power screw (29) and the guide rod (30). Each sliding block (32) is slidably connected in the corresponding limiting frame (31). The front end of the processing box (1) is equipped with a power motor (33) connected to the power screw (29).

6. The coalescing oil removal device for oilfield wastewater treatment according to claim 2, characterized in that, The drive assembly includes two sets of drive racks (34). Drive racks (34) are slidably connected to the left and right ends of the front side of the lifting plate (15). The two sets of drive racks (34) are located on both sides of the sinking shell (16). Reversing gears (35) are rotatably connected to the left and right outer ends of the sinking shell (16). Each reversing gear (35) meshes with the corresponding drive rack (34). Two movable racks (36) are fixedly connected to the left and right ends of the filter screen (17). Each set of movable racks (36) meshes with the corresponding reversing gear (35). A compression spring (37) is connected to the bottom end of each set of drive racks (34). A protective cover (38) located below the lifting plate (15) is installed at the lower end of the sinking shell (16). A rear cover plate (39) is installed inside the top of the impurity removal chamber (14).

7. The coalescing oil removal device for oilfield wastewater treatment according to claim 6, characterized in that, Two fastening discs (40) are fixedly connected to the top of the rear cover plate (39), and two base plates (41) are fixedly connected to the lifting plate (15). Each fastening disc (40) is fixedly connected to the bottom of the processing box (1) with a threaded rod (67) located in the base plate (41). Multiple friction balls (42) are rotatably connected to the top surface of each base plate (41). A stirring disc (43) is sleeved on each threaded rod (67). A ball (44) is rotatably connected inside each stirring disc (43). Each ball (44) is installed in the threaded groove outside the corresponding threaded rod (67). A top plate (45) that contacts the friction balls (42) is fixedly connected to the bottom surface of each stirring disc (43). A lifting motor (46) is fixedly connected to the top of the rear cover plate (39). A lifting screw (47) that is threadedly connected to the lifting plate (15) is installed on the bottom shaft of the lifting motor (46).

8. The coalescing oil removal device for oilfield wastewater treatment according to claim 7, characterized in that, The top of the rear cover plate (39) is provided with a feeding port (48) and a rear observation plate (49). The top of the lifting plate (15) is fixedly connected with a touch rod (50). A reinforcing rod (51) is connected between the tops of the two sets of driving racks (34). The inner wall of the sinking shell (16) is fixedly connected with a limit strip (52).

9. The coalescing oil removal device for oilfield wastewater treatment according to claim 2, characterized in that, The upper part of the oil removal chamber (3) is equipped with a front cover plate (53), the front cover plate (53) is provided with a chemical port (54) and a front observation plate (55), the bottom end of the oil removal frame (5) is provided with multiple stirring rods (56), a liquid extraction pipe (57) is provided between the oil removal chamber (3) and the impurity removal chamber (14), the interior of the impurity removal chamber (14) is equipped with a compressor (58) located below the lifting plate (15), the interior of the oil removal chamber (3) is equipped with a gas collection box (59), an exhaust pipe (60) is connected between the compressor (58) and the gas collection box (59), multiple exhaust pipes (61) are connected to the side of the gas collection box (59), compression springs (62) are connected to the front and rear ends of the compressor (58) respectively, and an air inlet pipe (63) is connected to the front end of the compressor (58).

10. The coalescence removal device for oilfield wastewater treatment according to claim 2, characterized in that, The right side of the collection chamber (21) and the oil storage chamber (12) are respectively provided with cleaning ports (65).

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