Oil scraping device for oilfield reinjection water treatment

Abstract

The invention discloses an oil scraping device for oilfield reinjection water treatment, and belongs to the technical field of oilfield water treatment.The oil scraping device for oilfield reinjection water treatment comprises a cover plate, a treatment bin, an inlet section, an insulating nano-porous plate, a sliding scraper and a mounting base, and the inner cavity wall of the mounting base is in sliding fit with the sliding scraper; the telescopic device is arranged in the mounting seat, is used for connecting the sliding scraping plate and the mounting seat, and has downward elastic propping acting force on the sliding scraping plate; and the driving device is arranged on the treatment bin and is used for driving the mounting seat to move, so that the sliding scraping plate slides on the upward surface of the insulating nano porous plate. Heavy oil and other sediments deposited on the surface of the insulating nano-porous plate are scraped into the lower end of the insulating nano-porous plate in the inclined direction through movement of the sliding scraper, the blocking area of the sediments on the surface of the insulating nano-porous plate is reduced, and then the influence of the sediments such as heavy oil and the like on the surface permeability of the insulating nano-porous plate can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of oilfield water treatment, and in particular relates to an oil scraper device used for oilfield reinjection water treatment. Background Art

[0002] In the mining, transportation and production process of petrochemical industry, catering and textile industry, a large amount of oily wastewater is inevitably generated or leaked. According to incomplete statistics, about 4 million tons of oil are leaked or discharged into the marine environment every year. The leakage of oil and the discharge of oily wastewater without treatment not only waste resources, but also damage the environment. Therefore, it is of great significance to carry out simple and efficient oil-water separation of oily wastewater.

[0003] After searching the Chinese authorized invention patent publication number CN109867402B, an oil-water separation device and an oil-water separation method are disclosed. The oil-water separation device includes an inlet section, a demulsification section, a separation section and a static section: the inlet section includes an inlet for inputting oily wastewater and a filter screen for filtering the oily wastewater; the demulsification section is connected to the inlet section to receive the coarse filtered wastewater after filtering by the inlet section, and the demulsification screen is located at the end of the demulsification section to demulsify the emulsified oil in the coarse filtered wastewater to generate demulsified wastewater; the separation section is connected to the demulsification section via the demulsification screen to receive the demulsified wastewater, a first electrode is arranged in the first accommodating chamber, a second accommodating chamber is lower than or higher than the first accommodating chamber, a second electrode is arranged in the second accommodating chamber, the first electrode and the second electrode are respectively connected to a power source to generate an electric field therebetween, a first end of the insulating nanoporous layer is accommodated in the first accommodating chamber and contacts the first electrode, and a second end thereof is accommodated in the second accommodating chamber and contacts the second electrode, and the insulating nanoporous layer immersed in water includes a plurality of nanometer-sized pores.

[0004] The oil-water separation device in the above-mentioned prior art first demulsifies the reinjection water when performing oil-water separation, and then separates the oil and water through the insulating nanoporous plate after demulsification. Although this technical solution can solve the current oil-water separation problem, since oil fields usually contain heavy oil, the sediment in the heavy oil is easy to accumulate on the surface of the insulating nanoporous plate, forming an accumulation layer after accumulation, which will block the reinjection water from filtering through the insulating nanoporous plate. As the oil-water separation process continues, the water permeability of the surface of the insulating nanoporous plate decreases rapidly, thereby affecting the overall oil-water separation efficiency of the reinjection water. In view of this, the present application provides an oilfield reinjection water treatment equipment that can solve the problem of heavy oil and other components generated as the oil-water separation process continues to accumulate on the surface of the insulating nanoporous plate, thereby affecting the oil-water separation effect of the insulating nanoporous plate. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the disadvantages of the prior art and provide an oil scraping device for oilfield reinjection water treatment.

[0006] The technical solution adopted to solve the above technical problems is: an oil scraper device for oilfield reinjection water treatment, comprising a treatment chamber with a cover plate on the top, an inlet section on the top surface of the cover plate, an insulating nanoporous plate is obliquely installed on the inner cavity wall of the treatment chamber, and further comprising: A sliding scraper slidably connected to the surface of the insulating nanoporous plate, wherein the lower surface of the sliding scraper is in sliding contact with the upper side of the insulating nanoporous plate; A mounting seat sleeved on the upper end of the sliding scraper, wherein the inner cavity wall of the mounting seat and the sliding scraper form a sliding fit; A telescopic device disposed in the mounting seat, the telescopic device is used to connect the sliding scraper and the mounting seat, and has a downward elastic resisting force on the sliding scraper; A driving device is arranged on the processing chamber, and the driving device is used to drive the mounting seat to move so that the sliding scraper slides on the upper side of the insulating nanoporous plate.

[0007] Through the above technical scheme, during the process of oil-water separation of reinjection water by the insulating nanoporous plate, heavy oil and the like in the reinjection water are deposited on the top surface of the insulating nanoporous plate, and the driving device drives the sliding scraper to slide on the surface of the insulating nanoporous plate, so that the sliding scraper scrapes the heavy oil and other sediments deposited on the surface of the insulating nanoporous plate into the lower end of the inclination direction of the insulating nanoporous plate, reducing the blocking area of ​​the sediment on the surface of the insulating nanoporous plate, thereby reducing the influence of the heavy oil and other sediments on the surface permeability of the insulating nanoporous plate. In addition, a telescopic device is provided, which has a certain buffering effect on the sliding scraper, so that during the process of scraping the sediment on the surface of the insulating nanoporous plate, the sliding scraper can reduce the wear of the sliding scraper on the surface of the insulating nanoporous plate by moving the sliding scraper upward.

[0008] Furthermore, the telescopic device includes a movable seat fixedly connected to the top of the mounting seat, a sliding rod is passed through the top of the movable seat, the sliding rod slides freely in the movable seat, the lower end of the sliding rod is passed into the mounting seat and slides freely, a telescopic scraper is fixed to the lower end of the sliding rod, the telescopic scraper is engaged in the mounting seat and slides freely in the mounting seat, one end of the telescopic scraper facing the insulating nanoporous plate is rotatably connected to the sliding scraper, a rebound unit is provided in the sliding scraper, the rebound unit is used to drive the sliding scraper to swing so that the sliding scraper is flush with the surface of the telescopic scraper, and an elastic abutting unit is provided in the movable seat, the elastic abutting unit is used to drive the telescopic scraper to move in the direction of the insulating nanoporous plate.

[0009] Through the above technical scheme, the movable seat moves along the inclined direction of the insulating nanoporous plate, thereby driving the mounting seat, the sliding scraper and the telescopic scraper to move synchronously, so that the sliding scraper can scrape off the sludge on the surface of the insulating nanoporous plate. In addition, when the sliding scraper is reset, the rebound unit enables the sliding scraper to avoid driving the sludge on the surface to the upper side of the insulating nanoporous plate by swinging. In addition, in the process of scraping off the sludge on the surface of the insulating nanoporous plate, the extrusion force of the sliding scraper on the surface of the insulating nanoporous plate changes automatically, thereby reducing the wear of the insulating nanoporous plate caused by the hard contact of the sliding scraper with the surface of the insulating nanoporous plate.

[0010] Furthermore, the driving device includes a driving cylinder obliquely installed on the outer wall of the processing chamber, and a cylinder rod of the driving cylinder penetrates the processing chamber and is connected to the moving seat.

[0011] Through the above technical solution, the cylinder rod of the driving cylinder is extended and retracted, thereby driving the moving seat and the mounting seat to slide on the surface of the insulating nanoporous plate. When sliding, the sliding scraper is synchronously driven to move, so that the sliding scraper scrapes off the silt on the surface of the insulating nanoporous plate, and the structure is simple.

[0012] Furthermore, the rebound unit includes a mounting shaft fixedly inserted into the telescopic scraper, the mounting shaft is axially perpendicular to the movement direction of the mounting seat in the processing chamber, a mounting hole is provided at the upper end of the sliding scraper for the mounting shaft to pass freely, and mounting grooves are provided on the outer walls on both sides of the sliding scraper, the mounting grooves are connected to the mounting holes, and a volute spring is installed in the mounting groove, the volute spring is wrapped around the periphery of the mounting shaft, and the two ends of the volute spring in the elastic force direction are respectively fixed to the inner wall of the mounting groove and the periphery of the mounting shaft.

[0013] Through the above technical solution, the volute spring has an elastic force on the sliding scraper in the initial state, so that the sliding scraper can swing around the axial direction of the installation shaft in the initial state.

[0014] Furthermore, a stop block is fixedly connected to the lower outer wall of the telescopic scraper, and a stop opening is opened on the side of the upper end of the sliding scraper facing away from the driving cylinder. The stop block cooperates with the side wall of the stop opening to limit the rotation of the sliding scraper around the axis of the mounting shaft.

[0015] Through the above technical solution, when the sliding scraper swings around the axial direction of the installation shaft, the stop block and the side wall of the stop opening cooperate with each other, so that when the sliding scraper rotates until its surface (corresponding to the movement direction of the sliding scraper) is flush with the telescopic scraper, the sliding scraper will not continue to rotate in the direction of the driving cylinder, so that after the sliding scraper scrapes off the surface sediment of the insulating nanoporous plate, when the driving cylinder is reset, the sliding scraper is subjected to the resistance of the surface of the insulating nanoporous plate, which will cause the sliding scraper to rotate around the axial direction of the installation shaft, that is, the sliding scraper will rotate in the direction away from the driving cylinder during the shortening of the cylinder rod of the driving cylinder, so that the sliding scraper will not continue to scrape off the sediment on the surface of the insulating nanoporous plate during the resetting process, thereby preventing the sliding scraper from driving the newly formed sediment on the surface of the insulating nanoporous plate to the upper side of the insulating nanoporous plate.

[0016] Furthermore, the elastic abutting unit includes a limiting ring fixedly sleeved on the periphery of the sliding rod, a sliding cavity for the limiting ring to engage is opened in the movable seat, the limiting ring slides freely up and down in the sliding cavity, an elastic member is installed in the sliding cavity, the elastic member elastically presses against the end face of the limiting ring in the direction of the mounting seat, the upper end of the sliding rod is fixedly sleeved with a limiting nut, and the end face of the limiting nut presses against the top face of the movable seat.

[0017] Through the above technical solution, the elastic part has an elastic resisting force on the limit ring toward the mounting seat, so that the sliding rod, in the initial state, drives the sliding scraper and the telescopic scraper to move toward the lower side of the mounting seat, that is, the sliding scraper is exposed to the mounting seat and contacts the surface of the insulating nanoporous plate.

[0018] Furthermore, a driving pin is fixedly connected to the upper end of the sliding rod, and a support frame is fixedly connected to the inner wall of the processing chamber. The support frame includes an upward moving section at both ends and a translation section in the middle. The two ends of the translation section in the length direction are respectively fixed to the two upward moving sections, and the driving pin slidably contacts the upper surface of the support frame.

[0019] Through the above technical solution, the cylinder rod of the driving cylinder will drive the moving seat to move during the extension and retraction process, so that the driving pin slides on the surfaces of the translation section and the upward section. When the driving pin slides from the translation section to the upward section, the driving pin will be lifted up, thereby driving the sliding rod to move in the direction away from the insulating nanoporous plate, so that the telescopic scraper and the sliding scraper can be retracted into the mounting seat, and the lower side mouth edge of the inner cavity of the mounting seat can scrape off the silt on the surface of the sliding scraper, so that the silt will not adhere to the surface of the sliding scraper, and then fall on the upper surface of the insulating nanoporous plate as the sliding scraper is reset.

[0020] Furthermore, the outer wall of the processing chamber is provided with an oil drain port and a water drain port from top to bottom, and the oil drain port is not lower than the lower end of the insulating nanoporous plate in the inclined direction.

[0021] Through the above technical solution, after oil and water are separated, the oil drain port is opened to discharge heavy oil and other sediments, and the water return water after oil and water separation can be discharged by opening the water drain port.

[0022] Furthermore, the end of the oil discharge port is connected with a connecting pipe, and the end of the connecting pipe away from the oil discharge port is connected with a compacting bin, the bottom of the compacting bin is open and fixedly connected with a fixing plate, the fixing plate has a bayonet on the downward side, a connecting plate is slidably engaged in the bayonet, a collecting bin is fixedly connected to the bottom surface of the connecting plate, the collecting bin is connected with the inner cavity of the compacting bin, and a compacting device is provided in the compacting bin.

[0023] Through the above technical solution, after the heavy oil and other silt are discharged into the compaction bin, the silt is compacted by the compaction device so that the silt can discharge a certain amount of reinjection water, so that the silt has a certain dehydration effect. In addition, after the silt is compacted, the volume is reduced and fixed, which makes it convenient to collect it.

[0024] Furthermore, the compacting device includes a compacting cylinder vertically installed on the top of the compacting bin, the cylinder rod of the compacting cylinder penetrates into the compacting bin and slides freely, a compacting plate is engaged in the compacting bin, the compacting plate slides freely up and down in the compacting bin, and the end of the cylinder rod of the compacting cylinder is fixedly connected to the top of the compacting plate, and a plurality of mounting openings are provided on the end surface of the compacting plate, and a ceramic diaphragm plate is installed on the mounting openings.

[0025] Through the above technical solution, when the compaction cylinder drives the compaction plate to move downward, the compaction plate will compact the sludge collected in the compaction bin. During the compaction process, the reinjected water in the sludge will pass through the ceramic membrane plate and be separated from the sludge.

[0026] The beneficial effects of the present invention are as follows: (1) In the present invention, a driving device drives a sliding scraper to slide on the surface of the insulating nanoporous plate, so that the sliding scraper scrapes the heavy oil and other sediments deposited on the surface of the insulating nanoporous plate into the lower end of the insulating nanoporous plate in the inclined direction, thereby reducing the blocking area of ​​the sediments on the surface of the insulating nanoporous plate, thereby reducing the influence of the heavy oil and other sediments on the surface permeability of the insulating nanoporous plate. In addition, a telescopic device is provided, and the telescopic device has a certain buffering effect on the sliding scraper, so that when the sliding scraper is scraping the sediments on the surface of the insulating nanoporous plate, the sliding scraper moves upward, thereby reducing the wear of the sliding scraper on the surface of the insulating nanoporous plate; (2) In the present invention, when the sliding scraper swings around the axial direction of the installation shaft, the stop block cooperates with the side wall of the stop opening, so that when the sliding scraper rotates until its surface (corresponding to the movement direction of the sliding scraper) is flush with the telescopic scraper, the sliding scraper will not continue to rotate in the direction of the driving cylinder, so that after the sliding scraper scrapes off the surface sediment of the insulating nanoporous plate, when the driving cylinder is reset, the sliding scraper is subjected to the resistance of the surface of the insulating nanoporous plate, which will cause the sliding scraper to rotate around the axial direction of the installation shaft, that is, the sliding scraper will rotate in the direction away from the driving cylinder during the shortening of the cylinder rod of the driving cylinder, so that the sliding scraper will not continue to scrape off the sediment on the surface of the insulating nanoporous plate during the reset process, thereby preventing the sliding scraper from driving the newly formed sediment on the surface of the insulating nanoporous plate to the upper side of the insulating nanoporous plate; (3) In the present invention, after the heavy oil and other sludge are discharged into the compaction bin, the sludge is compacted by the compaction device so that the sludge can discharge a certain amount of reinjection water, so that the sludge has a certain dehydration effect. In addition, after the sludge is compacted, its volume is reduced and fixed, which makes it convenient to collect it. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an oil scraper device for oilfield reinjection water treatment in the present invention; Figure 2 yes Figure 1 Schematic diagram of the positional relationship after the middle part of the structure is cut open; Figure 3 It is a schematic diagram of the structure after the insulating nanoporous plate, the mounting seat, the moving seat and the driving cylinder are assembled in the present invention; Figure 4 yes Figure 3 A schematic diagram of the structure from another perspective; Figure 5 It is a schematic diagram of the structure after the telescopic scraper, the sliding scraper and the mounting seat are assembled in the present invention; Figure 6 yes Figure 5 Schematic diagram of the explosion decomposition of the structure in the middle; Figure 7 yes Figure 5 Schematic diagram of the positional relationship after the middle part of the structure is cut open; Figure 8 yes Figure 5 A schematic diagram of the structure from another perspective; Fig. 9 It is a schematic diagram of the structure of the compaction bin, the collection bin and the compaction cylinder after being assembled in the present invention.

[0028] Attached figure numbers: 1. inlet section; 2. cover plate; 3. driving cylinder; 4. processing chamber; 5. compacting cylinder; 6. oil drain port; 7. connecting pipe; 8. compacting chamber; 9. fixing plate; 10. collecting chamber; 11. drain port; 12. upward section; 13. translation section; 14. insulating nanoporous plate; 15. mounting seat; 16. moving seat; 17. telescopic scraper; 18. sliding scraper; 19. sliding rod; 20. driving pin; 21. stop block; 22. limiting nut; 23. elastic member; 24. limiting ring; 25. mounting shaft; 26. volute spring; 27. mounting groove; 28. stop port; 29. ​​connecting plate; 30. compacting plate; 31. ceramic diaphragm plate. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] like Figure 1-Figure 9 As shown, the present embodiment provides an oil scraping device for treating oilfield reinjection water, comprising a treatment chamber 4, the top of which is open and is provided with a cover plate 2, the top of which is provided with an inlet section 1, a demulsifier screen (not shown in the figure) is provided in the inlet section 1, an external conveying system conveys the reinjection water from the inlet section 1 to the treatment chamber 4, and in addition, an insulating nanoporous plate 14 is obliquely installed on the inner cavity wall of the treatment chamber 4, the structure and working principle of the insulating nanoporous plate 14 are prior art and are not described again here, a driving cylinder 3 is obliquely installed on the outer wall of the treatment chamber 4, the cylinder rod of the driving cylinder 3 penetrates the treatment chamber 4 and slides freely on the treatment chamber 4, the driving cylinder 3 is located above the insulating nanoporous plate 14, and the axial direction of the cylinder rod is parallel to the inclination direction of the insulating nanoporous plate 14, a moving seat 16 is installed at the end of the cylinder rod of the driving cylinder 3, the bottom of the moving seat 16 is fixedly connected to a mounting seat 15, the mounting seat 15 is hollow inside and open at the bottom. In addition, a telescopic scraper 17 is mounted in the inner cavity of the mounting seat 15. The telescopic scraper 17 can slide freely in the inner cavity of the mounting seat 15 in a direction perpendicular to the surface of the insulating nanoporous plate 14. A mounting shaft 25 is fixedly penetrated at the lower end of the telescopic scraper 17. The axial direction of the mounting shaft 25 is perpendicular to the movement direction of the mounting seat 15 in the processing chamber 4. A sliding scraper 18 is sleeved on the mounting shaft 25, so that the sliding scraper 18 can rotate around the axial direction of the mounting shaft 25, so that the sliding scraper 18 is rotatably connected to the lower end of the telescopic scraper 17. Specifically, a mounting hole is provided at the upper end of the sliding scraper 18 for the mounting shaft 25 to pass freely. The thickness of the sliding scraper 18 is consistent with that of the telescopic scraper 17, and the sliding scraper 18 and the inner cavity of the mounting seat 15 also constitute a sliding fit, that is, the sliding scraper 18 can be engaged in the inner cavity of the mounting seat 15 and slide freely. Combination Figures 3 to 7 As shown, the outer walls of both sides of the sliding scraper 18 corresponding to the mounting shaft 25 at both axial ends are provided with blind hole-shaped mounting grooves 27, and the outer walls of both sides of the sliding scraper 18 are provided with mounting grooves 27, which are connected with the mounting holes, and a volute spring 26 is installed in the mounting groove 27, which is wrapped around the periphery of the mounting shaft 25, and the two ends of the volute spring 26 in the elastic force direction are respectively fixed to the inner wall of the mounting groove 27 and the periphery of the mounting shaft 25. In the initial state, the volute spring 26 The plate 18 has an elastic force, so that the sliding scraper 18 can swing around the axial direction of the mounting shaft 25 and in the direction of the driving cylinder 3 in the initial state. A stop block 21 is fixedly connected to the outer wall of the lower side of the telescopic scraper 17. A stop opening 28 is opened on the side of the upper end of the sliding scraper 18 facing away from the driving cylinder 3. The stop opening 28 has a side wall, and the side wall faces away from the driving cylinder 3. The stop block 21 cooperates with the side wall of the stop opening 28 to limit the rotation of the sliding scraper 18 around the axis of the mounting shaft 25. Combination Figures 3 to 7 As shown, a sliding rod 19 is vertically penetrated on the top of the moving seat 16, and the sliding rod 19 slides freely in the moving seat 16. The lower end of the sliding rod 19 penetrates into the mounting seat 15 and slides freely. The lower end of the sliding rod 19 is fixedly connected to the top of the telescopic scraper 17. The periphery of the sliding rod 19 is fixedly sleeved with a limit ring 24. A sliding cavity for the limit ring 24 to engage is opened in the moving seat 16. The limit ring 24 slides freely up and down in the sliding cavity. An elastic member 23 is installed in the sliding cavity. The elastic member 23 elastically presses against the end face of the limit ring 24 in the direction of the mounting seat 15. The upper end of the sliding rod 19 is fixedly sleeved with the limit ring 24. Nut 22, the end face of the limiting nut 22 abuts against the top face of the moving seat 16, and the limiting nut 22 limits the movement of the sliding rod 19 toward the mounting seat 15. In addition, in this embodiment, the elastic member 23 can be a conventional structure with elastic deformation such as a spring, and the elastic member 23 generates an elastic abutting force toward the mounting seat 15 on the limiting ring 24, so that in the initial state, the sliding rod 19 can drive the telescopic scraper 17 and the sliding scraper 18 to move toward the outer side of the mouth of the mounting seat 15 until the lower surface of the sliding scraper 18 abuts against the surface of the insulating nanoporous plate 14; In addition, combined Figures 3 to 8 As shown, a driving pin 20 is fixedly connected to the upper end of the sliding rod 19, and a support frame is fixedly connected to the inner wall of the processing chamber 4. The support frame includes an upward moving section 12 at both ends and a translation section 13 in the middle. The outer contour of the upward moving section 12 is roughly L-shaped, and the two ends of the translation section 13 in the length direction are respectively fixed to the two upward moving sections 12. The driving pin 20 slides in contact with the upper surface of the support frame, that is, the periphery of the driving pin 20 can slide on the upper surfaces of the upward moving section 12 and the translation section 13 in turn.

[0031] Combination Figure 1 , Figure 2 and Fig. 9As shown, the outer wall of the processing chamber 4 is provided with an oil discharge port 6 and a water discharge port 11 from top to bottom. The oil discharge port 6 is not lower than the lower end of the insulating nanoporous plate 14 in the inclined direction, so that the sludge on the surface of the insulating nanoporous plate 14 can be discharged and collected through the oil discharge port 6. The end of the oil discharge port 6 is connected with a connecting pipe 7, and the end of the connecting pipe 7 away from the oil discharge port 6 is connected with a compacting chamber 8. The bottom of the compacting chamber 8 is open and fixed with a fixing plate 9. The fixing plate 9 has a bayonet on the downward side, and a connecting plate 29 is slidably engaged in the bayonet. The bottom of the connecting plate 29 is fixed with a collecting chamber 10. The collecting chamber 10 is connected with the inner cavity of the compacting chamber 8. When the compacting chamber 8 and the collecting chamber 10 are assembled, Since the compacting bin 8 is suspended on the ground through the connecting pipe 7, the connecting plate 29 can be directly inserted into the slot of the fixing plate 9, thereby connecting the compacting bin 8 and the collecting bin 10. In addition, after assembly, there is basically no gap between the bottom surface of the compacting bin 8 and the top surface of the collecting bin 10. A compacting cylinder 5 is vertically installed on the top of the compacting bin 8. The cylinder rod of the compacting cylinder 5 penetrates into the compacting bin 8 and slides freely. A compacting plate 30 is engaged in the compacting bin 8. The compacting plate 30 slides freely up and down in the compacting bin 8, and the end of the cylinder rod of the compacting cylinder 5 is fixedly connected to the top of the compacting plate 30. A plurality of mounting openings are opened on the end face of the compacting plate 30, and a ceramic diaphragm plate 31 is installed at the mounting opening.

[0032] The working principle of this embodiment is as follows: The external conveying system conveys the reinjection water from the inlet section 1 to the processing chamber 4. The reinjection water is first demulsified by the demulsifying screen in the inlet section 1. After the demulsification, the reinjection water flows into the surface of the insulating nanoporous plate 14. The insulating nanoporous plate 14 performs oil-water separation on the reinjection water through the existing technology. Since heavy oil and other sediments in the reinjection water are easily deposited on the surface of the insulating nanoporous plate 14, when the oil-water separation is performed, the electromagnetic valve connected to the driving cylinder 3 is controlled to start through an external relay or other equipment, so that the electromagnetic valve can control the cylinder rod of the driving cylinder 3 to reciprocate and extend; When the cylinder rod of the driving cylinder 3 is extended, it drives the moving seat 16 and the mounting seat 15 to move toward the lower end of the inclination direction of the insulating nanoporous plate 14. At this time, due to the elastic force of the volute spring 26 on the sliding scraper 18, the sliding scraper 18 is flush with the surface of the telescopic scraper 17. At the same time, due to the abutment between the stop block 21 and the side wall of the stop opening 28, the sliding scraper 18 will not swing toward the direction of the driving cylinder 3, and the driving pin 20 slides from the upper moving section 12 on the left to the translation section 13 (such as Figure 2 , Figure 3As shown), the sliding rod 19 is subjected to the elastic push force of the elastic member 23 on the limit ring 24, so that the sliding scraper 18 and the telescopic scraper 17 are exposed to the outside of the lower side opening of the mounting seat 15, and the lower surface of the sliding scraper 18 is against the surface of the insulating nanoporous plate 14. Therefore, when the cylinder rod of the driving cylinder 3 is extended, the sliding scraper 18 can slide on the surface of the insulating nanoporous plate 14 and move the silt deposited on the surface of the insulating nanoporous plate 14 toward the inclined direction of the insulating nanoporous plate 14. During the driving process, the elastic member 23 exerts an elastic force on the limit ring 24, so that the extrusion force of the sliding scraper 18 on the surface of the insulating nanoporous plate 14 is not too large. As the cylinder rod of the driving cylinder 3 continues to extend, the driving pin 20 will slide on the translation section 13, so that the lower surface of the sliding scraper 18 maintains contact with the surface of the insulating nanoporous plate 14, thereby being able to drive the silt on the surface of the insulating nanoporous plate 14 toward one end of the inclination direction of the insulating nanoporous plate 14; When the sliding scraper 18 is about to approach the lower end of the insulating nanoporous plate 14 in the tilted direction, the driving pin 20 will slide from the translation section 13 to the right upward section 12 (such as Figure 2 and Figure 3 As shown), the driving pin 20 drives the sliding rod 19 to move upward, so that the sliding rod 19 drives the telescopic scraper 17 and the sliding scraper 18 to move in the direction of being retracted into the inner side of the mounting seat 15. During this process, the inner edge of the lower side opening of the inner cavity of the mounting seat 15 can scrape off the silt attached to the surface of the sliding scraper 18 and the telescopic scraper 17, and drop it on the lower end of the insulating nanoporous plate 14 in the inclined direction; Then the cylinder rod of the driving cylinder 3 is shortened, thereby driving the moving seat 16 and the mounting seat 15 to move in the opposite direction. At this time, they are subjected to the resistance of the surface of the insulating nanoporous plate 14 (along the inclination direction of the insulating nanoporous plate 14), and because the elastic potential energy of the elastic member 23 is released at this time, the sliding scraper 18 has a certain extrusion force on the surface of the insulating nanoporous plate 14, so that when the sliding scraper 18 moves in the direction of the driving cylinder 3, it will generate an axial rotation around the mounting shaft 25, that is, the sliding scraper 18 swings in the direction away from the driving cylinder 3, so that when the sliding scraper 18 is reset, the silt on the lower side of the insulating nanoporous plate 14 will not be driven back to the upper side of the insulating nanoporous plate 14; After the oil-water separation is completed, the drain port 11 is opened to discharge the reinjected water, and then the oil drain port 6 is opened. The sludge will enter the compacting bin 8 through the oil drain port 6 and the connecting pipe 7, and fall into the collecting bin 10. After the collection is completed, the compacting cylinder 5 is started, and the cylinder rod of the compacting cylinder 5 is extended, thereby driving the compacting plate 30 to move downward, so that the compacting plate 30 is stuck in the collecting bin 10, and then the sludge in the collecting bin 10 is compacted. During the compaction process, a small amount of reinjected water will pass through the ceramic membrane plate 31 and be separated from the sludge. After compaction is completed, the cylinder rod of the compacting cylinder 5 can be driven to shorten, so that the reinjection water can move up with the compacting plate 30 and flow back to the processing chamber 4 through the connecting pipe 7. Of course, a small amount of reinjection water will re-enter the compacted sludge through the ceramic membrane plate 31, but since it is not affected by the pressure of the compacting plate 30, the reinjection water re-entering the sludge is extremely small and can be ignored. When collecting the compacted sludge, the collection chamber 10 can be directly pushed to the outside of the compacting chamber 8 for collection.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. An oil scraper device for treating oilfield reinjection water, comprising a treatment chamber (4) with a cover plate (2) on the top, the cover plate (2) having an inlet section (1) on the top surface, and an insulating nanoporous plate (14) being obliquely mounted on the inner wall of the treatment chamber (4), characterized in that: Also includes: A sliding scraper (18) slidably connected to the surface of the insulating nanoporous plate (14), wherein the lower surface of the sliding scraper (18) is in sliding contact with the upper side of the insulating nanoporous plate (14); A mounting seat (15) sleeved on the upper end of the sliding scraper (18), wherein the inner cavity wall of the mounting seat (15) and the sliding scraper (18) form a sliding fit; a telescopic device disposed in the mounting seat (15), the telescopic device being used to connect the sliding scraper (18) and the mounting seat (15), and having a downward elastic resisting force on the sliding scraper (18); A driving device is provided on the processing chamber (4), the driving device being used to drive the mounting seat (15) to move so that the sliding scraper (18) slides on the upper side of the insulating nanoporous plate (14).

2. The oil scraping device for oilfield reinjection water treatment according to claim 1 is characterized in that: The telescopic device comprises a movable seat (16) fixedly connected to the top of the mounting seat (15); a sliding rod (19) is passed through the top of the movable seat (16); the sliding rod (19) slides freely in the movable seat (16); the lower end of the sliding rod (19) penetrates into the mounting seat (15) and slides freely; the lower end of the sliding rod (19) is fixedly connected to a telescopic scraper (17); the telescopic scraper (17) is engaged in the mounting seat (15) and slides freely in the mounting seat (15); One end of the telescopic scraper (17) facing the insulating nanoporous plate (14) is rotatably connected to the sliding scraper (18); a rebound unit is provided in the sliding scraper (18); the rebound unit is used to drive the sliding scraper (18) to swing so that the sliding scraper (18) is flush with the surface of the telescopic scraper (17); an elastic abutment unit is provided in the movable seat (16); the elastic abutment unit is used to drive the telescopic scraper (17) to move in the direction of the insulating nanoporous plate (14).

3. The oil scraping device for oilfield reinjection water treatment according to claim 2, characterized in that: The driving device comprises a driving cylinder (3) obliquely mounted on the outer wall of the processing chamber (4); a cylinder rod of the driving cylinder (3) penetrates the processing chamber (4) and is connected to the moving seat (16).

4. The oil scraping device for oilfield reinjection water treatment according to claim 3 is characterized in that: The rebound unit comprises a mounting shaft (25) fixedly inserted into the telescopic scraper (17), the mounting shaft (25) being axially perpendicular to the movement direction of the mounting seat (15) in the processing chamber (4), a mounting hole for the mounting shaft (25) to pass freely is provided at the upper end of the sliding scraper (18), mounting grooves (27) are provided on the outer walls on both sides of the sliding scraper (18), the mounting grooves (27) are connected to the mounting holes, and a volute spring (26) is installed in the mounting groove (27), the volute spring (26) is wrapped around the periphery of the mounting shaft (25), and the two ends of the volute spring (26) in the elastic force direction are respectively fixed to the inner wall of the mounting groove (27) and the periphery of the mounting shaft (25).

5. The oil scraping device for oilfield reinjection water treatment according to claim 4, characterized in that: A stop block (21) is fixedly connected to the lower outer wall of the telescopic scraper (17); a stop opening (28) is provided on the upper end of the sliding scraper (18) on the side facing away from the driving cylinder (3); the stop block (21) cooperates with the side wall of the stop opening (28) to limit the rotation of the sliding scraper (18) around the axis of the mounting shaft (25).

6. The oil scraping device for oilfield reinjection water treatment according to claim 2, characterized in that: The elastic abutting unit comprises a limit ring (24) fixedly sleeved on the periphery of the sliding rod (19); a sliding cavity for the limit ring (24) to engage is provided in the movable seat (16); the limit ring (24) slides freely up and down in the sliding cavity; an elastic member (23) is installed in the sliding cavity; the elastic member (23) elastically abuts against the end face of the limit ring (24) in the direction of the mounting seat (15); a limit nut (22) is fixedly sleeved on the upper end of the sliding rod (19); the end face of the limit nut (22) abuts against the top face of the movable seat (16).

7. The oil scraping device for oilfield reinjection water treatment according to claim 2, characterized in that: A driving pin (20) is fixedly connected to the upper end of the sliding rod (19), and a support frame is fixedly connected to the inner wall of the processing chamber (4). The support frame includes an upward moving section (12) provided at both ends and a translation section (13) in the middle. The two ends of the translation section (13) in the length direction are respectively fixedly connected to the two upward moving sections (12), and the driving pin (20) slidably contacts the upper surface of the support frame.

8. The oil scraping device for oilfield reinjection water treatment according to claim 1, characterized in that: The outer wall of the processing chamber (4) is provided with an oil discharge port (6) and a water discharge port (11) from top to bottom, and the oil discharge port (6) is not lower than the lower end of the insulating nanoporous plate (14) in the tilting direction.

9. The oil scraping device for oilfield reinjection water treatment according to claim 8, characterized in that: The end of the oil discharge port (6) is connected to a connecting pipe (7), and the end of the connecting pipe (7) away from the oil discharge port (6) is connected to a compacting bin (8). The bottom of the compacting bin (8) is open and fixedly connected to a fixing plate (9). A bayonet is provided on a downward side of the fixing plate (9), and a connecting plate (29) is slidably engaged in the bayonet. A collecting bin (10) is fixedly connected to the bottom surface of the connecting plate (29). The collecting bin (10) is connected to the inner cavity of the compacting bin (8), and a compacting device is provided in the compacting bin (8).

10. The oil scraping device for oilfield reinjection water treatment according to claim 9, characterized in that: The compacting device comprises a compacting cylinder (5) vertically mounted on the top of the compacting bin (8), the cylinder rod of the compacting cylinder (5) penetrates into the compacting bin (8) and slides freely, a compacting plate (30) is engaged in the compacting bin (8), the compacting plate (30) slides freely up and down in the compacting bin (8), and the end of the cylinder rod of the compacting cylinder (5) is fixedly connected to the top of the compacting plate (30), and a plurality of mounting openings are provided on the end surface of the compacting plate (30), and a ceramic diaphragm plate (31) is mounted on the mounting openings.

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