Skid-mounted reinjection water oil-water separation treatment device

Abstract

The invention discloses a skid-mounted reinjection water oil-water separation treatment device, and belongs to the technical field of water treatment, the skid-mounted reinjection water oil-water separation treatment device comprises a cover plate, a separation bin, a feeding pipe, a centrifugal grinding bin, a grinding layer and a grinding gap; the mounting base is fixedly connected to the inner cavity wall of the separation bin, and a hydrophilic oleophobic filter plate is fixedly connected to an opening part of the upper side of the mounting base. Oil-water mixed liquid fed into the centrifugal grinding bin is thrown out of the discharging port under the action of centrifugal force and thrown to the surface of the grinding layer, then the oil-water mixed liquid enters the grinding gap, and along with rotation of the centrifugal grinding bin, the centrifugal grinding bin and the grinding layer jointly grind the oil-water mixed liquid entering the grinding gap; the demulsification efficiency is improved, in addition, the demulsified oil-water mixed liquid is not prone to agglomerate again after being ground and demulsified, in addition, due to the arrangement of the hydrophilic and oleophobic filter plate, water can penetrate through the hydrophilic and oleophobic filter plate, oil is reserved on the surface of the hydrophilic and oleophobic filter plate, and the oil-water separation effect is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to a skid-mounted reinjection water oil-water separation treatment device. Background Art

[0002] Reinjection of water is an important process in oil field development, mainly used to increase the recovery rate of oil fields and maintain the pressure of oil layers. During the development of oil fields, as crude oil is produced, the pressure of the oil layers will gradually decrease, resulting in a decrease in crude oil production or even a shutdown. In order to compensate for this pressure drop, water is injected into the oil layer through water injection wells to maintain or increase the pressure of the oil layers, thereby increasing the recovery rate of crude oil. There are many ways to inject water into oil fields, including edge water injection, cutting water injection and area water injection, and the specific method depends on the characteristics of the oil field. The choice of water injection timing is also critical and can be determined based on factors such as the natural energy and geological characteristics of the oil field. In addition, the injection treatment technology of produced water in oil fields is also an important method. As the oil field is exploited, the water content in the produced fluid will gradually increase. If these oily wastewaters are directly discharged, it will cause serious environmental pollution. Therefore, treating these oily wastewaters and then injecting them back into the formation can not only avoid environmental pollution, but also save water resources. Oilfield produced water usually contains surfactants and has a higher temperature, which is conducive to improving oil washing ability. The water quality is stable and will not produce precipitation when mixed with the oil layer.

[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] When the oil-water separation device in the above-mentioned prior art separates the oil-water mixture, it first uses a demulsifier to demulsify the oil and water, that is, to eliminate the emulsion in the oil-water mixture. Since the demulsifier in the prior art uses the oil-water mixture to pass through the demulsifier under the action of gravity to achieve demulsification, when the amount of the oil-water mixture is large, the demulsifier efficiency of the demulsifier on the oil-water mixture is low. In addition, after the oil-water mixture that has been demulsified by the demulsifier passes through the demulsifier, emulsions may still form in the oil-water mixture after passing through the demulsifier, and then larger emulsion droplets are re-formed, which reduces the demulsification effect. 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 a skid-mounted reinjection water oil-water separation treatment device.

[0006] The technical solution adopted to solve the above technical problems is: a skid-mounted reinjection water oil-water separation treatment device, including a separation bin with an open top and connected to a cover plate, and also includes: A feeding pipe is coaxially rotatably connected to the end surface of the cover plate, the lower end of the feeding pipe extends to the separation bin and is coaxially fixed with a centrifugal grinding bin, the centrifugal grinding bin is hollow inside and has a discharge port on its periphery; A grinding layer is arranged on the inner wall of the separation chamber, and a grinding gap is formed between the grinding layer and the periphery of the centrifugal grinding chamber; A mounting seat is fixedly connected to the inner cavity wall of the separation chamber, and a hydrophilic and oleophobic filter plate is fixedly connected to the upper side opening of the mounting seat.

[0007] Through the above technical scheme, the oil-water mixture is fed into the centrifugal grinding bin through the feeding pipe, and the centrifugal grinding bin rotates so that the oil-water mixture fed into the centrifugal grinding bin is subjected to centrifugal force, and then is thrown out from the discharge port and thrown onto the surface of the grinding layer, so that the oil-water mixture enters the grinding gap. As the centrifugal grinding bin rotates, the centrifugal grinding bin and the grinding layer jointly grind the oil-water mixture entering the grinding gap. Compared with the demulsification method using a demulsification screen in the prior art, the size of emulsion droplets in the oil-water mixture is reduced, and the demulsification efficiency is improved. In addition, the demulsified oil-water mixture is not easy to agglomerate again after grinding and demulsification. In addition, through the arrangement of the hydrophilic and oleophobic filter plate, water can pass through the hydrophilic and oleophobic filter plate while oil remains on the surface of the hydrophilic and oleophobic filter plate, thereby achieving the effect of oil-water separation.

[0008] Furthermore, a driven pulley is fixedly sleeved on the periphery of the feeding pipe, a stepper motor is installed on the outer wall of the separation bin, a driving pulley is fixedly sleeved on the output shaft of the stepper motor, and the driving pulley and the driven pulley are connected via a V-belt transmission.

[0009] Through the above technical solution, the driving pulley and the driven pulley are connected through a V-belt, so that when the driving pulley rotates, it can drive the driven pulley to rotate. When the stepper motor is working, the output shaft of the stepper motor rotates, thereby driving the driving pulley to rotate, and driving the driven pulley to rotate, thereby driving the feeding pipe to rotate. When the feeding pipe rotates, it will drive the centrifugal grinding bin to rotate, so that the oil-water mixture fed into the centrifugal grinding bin can be affected by centrifugal force. The structure is simple and does not require manual operation.

[0010] Furthermore, an outer wall of the separation chamber is provided with an oil outlet, the oil outlet corresponds to the top surface of the hydrophilic and oleophobic filter plate, and a drainage outlet is provided at the bottom of the separation chamber.

[0011] Through the above technical solution, the oil outlet and the drain outlet are used to discharge waste oil and water respectively. In addition, the mouth of the oil outlet corresponds to the top surface of the hydrophilic oleophobic filter plate, so that the waste oil retained on the top surface of the hydrophilic oleophobic filter plate can smoothly enter the oil outlet and be discharged.

[0012] Furthermore, the end of the feeding pipe is rotatably connected to a rotary joint, and the rotary joint is connected to an external oil-water delivery system.

[0013] Through the above technical solution, the external oil-water conveying system conveys the oil-water mixture to be treated to the rotary joint, and then conveys it to the feeding pipe by the rotary joint.

[0014] Furthermore, a spoiler is fixedly connected to the inner wall of the centrifugal grinding chamber, one end of the spoiler extends to the inner edge of the outlet, and the other end of the spoiler is fixedly connected to the inner wall of the centrifugal grinding chamber.

[0015] Through the above technical scheme, by setting the spoiler, when the centrifugal grinding chamber rotates, the oil-water mixture in the centrifugal grinding chamber is disturbed by the spoiler, and the oil-water mixture flows along the surface of the spoiler toward the mouth of the discharge port, thereby making the oil-water mixture in the centrifugal grinding chamber flow rapidly toward the mouth of the discharge port during the rotation of the centrifugal grinding chamber, thereby improving the discharge of the oil-water mixture in the centrifugal grinding chamber.

[0016] Furthermore, an installation chamber is coaxially fixed to the bottom of the centrifugal grinding chamber, the interior of the installation chamber is connected to the interior of the centrifugal grinding chamber, a floating dispersion part is engaged with the inner cavity of the installation chamber, the floating dispersion part is in the shape of a cone with a pointed top and a wide bottom, the floating dispersion part slides freely up and down in the installation chamber, and an elastic driving unit is provided on the installation chamber for driving the floating dispersion part to move upward.

[0017] Through the above technical scheme, after the oil-water mixture in the feeding pipe enters the centrifugal grinding bin, the floating dispersion part is in a cone shape, and the floating dispersion part can disperse the oil-water mixture to the outside of the centrifugal grinding bin. In addition, the elastic driving unit generates an upward elastic resisting force on the floating dispersion part, so that the oil-water mixture enters the centrifugal grinding bin and generates an impact force on the floating dispersion part, so that the floating dispersion part can move toward the inside of the installation bin. When the flow rate of the oil-water mixture entering the centrifugal grinding bin from the feeding pipe is large, the floating dispersion part increases the storage capacity of the oil-water mixture in the centrifugal grinding bin by moving toward the inside of the installation bin, and when the flow rate is small, the floating dispersion part moves upward to disperse the oil-water mixture toward the outside of the centrifugal grinding bin.

[0018] Furthermore, the elastic drive unit includes a floating column coaxially fixed to the end face of the floating dispersing part, the floating column passes through the bottom of the installation bin and is free to slide and rotate vertically, and an elastic member is vertically installed in the installation bin, and the elastic member elastically presses upward against the lower end face of the floating dispersing part.

[0019] Through the above technical solution, the elastic part generates an upward elastic resisting force on the floating dispersion part, so that when the flow rate of the oil-water mixture input into the centrifugal grinding chamber is small, the floating dispersion part can produce a dispersing effect on the oil-water mixture, so that the oil-water mixture is quickly dispersed and flows to the outside of the centrifugal grinding chamber.

[0020] Furthermore, the end face of the hydrophilic and oleophobic filter plate is coaxially rotatably connected with a rotating part, and a telescopic piece is fixedly connected to the periphery of the rotating part. The telescopic piece is in the shape of a spiral spring and its lower surface is in contact with the top surface of the hydrophilic and oleophobic filter plate. The other end of the telescopic piece is fixedly connected with a positioning pin, and the positioning pin is fixedly penetrated through the end face of the hydrophilic and oleophobic filter plate, so that when the rotating part rotates around its own axis, it will drive the telescopic piece to elastically contract or elastically expand. The floating column and the rotating part are connected by a rotating component, and the rotating component is used to drive the rotating part to rotate when the floating column moves vertically, so as to make the telescopic piece elastically contract or elastically expand accordingly.

[0021] Through the above technical scheme, the expansion piece can shrink and expand, so that during the shrinkage and expansion process of the expansion piece, the lower surface of the expansion piece has an oil scraping effect on the top surface of the hydrophilic oleophobic filter plate, thereby improving the efficiency of water in the oil-water mixture passing through the hydrophilic oleophobic filter plate. In addition, since the expansion piece is in the shape of a spiral spring, it can have a barrier effect on the oil, thereby making it difficult for an oil film to be generated on the top surface of the hydrophilic oleophobic filter plate. Even if an oil film is generated, the oil film is not complete, but sporadic, thereby avoiding the influence of the oil film on the water passing through the hydrophilic oleophobic filter plate.

[0022] Furthermore, the rotating component includes a connecting tube coaxially connected to the upper end surface of the rotating part, the lower end of the floating column is inserted into the connecting tube and rotates freely, two balls are rotatably embedded in the lower end of the floating column, the inner wall of the connecting tube is provided with a spiral rolling groove for the balls to engage, and the balls roll freely in the spiral rolling groove, a stop rod is horizontally fixed to the inner wall of the separation bin, and a limiting groove is provided at the periphery of the floating column for the stop rod to pass freely.

[0023] Through the above technical solution, when the floating dispersion part moves up and down, the floating column will cause vertical movement relative to the connecting tube, and then the ball will roll in the spiral rolling groove, so that the connecting tube can rotate around its own axis and the rotating part can rotate. When the rotating part rotates, it will produce a contraction and expansion effect on the telescopic piece.

[0024] Furthermore, a through groove is provided at the bottom of the mounting seat, and two guide rods are vertically fixedly connected to the bottom of the mounting seat, and a floating plate is commonly sleeved on the two guide rods. A guide hole is provided on the end surface of the floating plate for the guide rod to pass freely, and a limiting nut is fixedly sleeved on the lower end of the guide rod, and the upper surface of the limiting nut abuts against the bottom surface of the floating plate, and a sealing portion is fixedly connected to the upper end surface of the floating plate, and the sealing portion corresponds to the through groove, and a spring is sleeved around the periphery of the guide rod, and the two ends of the spring in the direction of elastic force elastically abut against the bottom surface of the mounting seat and the top surface of the floating plate respectively.

[0025] Through the above technical solution, when the water level in the separation chamber rises to a certain level, the float plate will move upward due to the buoyancy of the water, causing the sealing part to move upward and produce a sealing effect on the through groove, thereby preventing the water in the separation chamber from flowing back to the top surface of the hydrophilic and oleophobic filter plate through the hydrophilic and oleophobic filter plate.

[0026] The beneficial effects of the present invention are as follows: (1) In the present invention, the oil-water mixture is fed into the centrifugal grinding chamber through a feeding pipe, and the centrifugal grinding chamber rotates, so that the oil-water mixture fed into the centrifugal grinding chamber is subjected to centrifugal force, and then thrown out from the discharge port and thrown onto the surface of the grinding layer, so that the oil-water mixture enters the grinding gap. As the centrifugal grinding chamber rotates, the centrifugal grinding chamber and the grinding layer jointly grind the oil-water mixture entering the grinding gap. Compared with the demulsification method using a demulsification screen in the prior art, the size of the emulsion droplets in the oil-water mixture is reduced, and the demulsification efficiency is improved. In addition, the demulsified oil-water mixture is not easy to agglomerate again after grinding and demulsification. In addition, by setting the hydrophilic and oleophobic filter plate, water can pass through the hydrophilic and oleophobic filter plate while the oil remains on the surface of the hydrophilic and oleophobic filter plate, thereby achieving the effect of oil-water separation; (2) The expansion sheet of the present invention can shrink and expand, so that during the shrinkage and expansion process of the expansion sheet, the lower surface of the expansion sheet has an oil scraping effect on the top surface of the hydrophilic oleophobic filter plate, thereby improving the efficiency of water in the oil-water mixture passing through the hydrophilic oleophobic filter plate. In addition, since the expansion sheet is in the shape of a spiral spring, it can have a barrier effect on the oil, thereby making it difficult for an oil film to be formed on the top surface of the hydrophilic oleophobic filter plate. Even if an oil film is formed, the oil film is not complete but sporadic, thereby preventing the oil film from affecting the water passing through the hydrophilic oleophobic filter plate. (3) In the present invention, when the water level in the separation chamber rises to a certain level, the float plate will move upward due to the buoyancy of the water, causing the blocking portion to move upward and produce a blocking effect on the through groove, thereby preventing the water in the separation chamber from flowing back to the top surface of the hydrophilic and oleophobic filter plate through the hydrophilic and oleophobic filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a skid-mounted reinjection water oil-water separation treatment device in the present invention; Figure 2 yes Figure 1 A schematic cross-sectional view of a part of the structure; Figure 3 This is a schematic diagram of the structure after the separation bin and the cover plate are omitted in the present invention; Figure 4 yes Figure 3 Schematic diagram of the structure at an upward viewing angle; Figure 5 yes Figure 4 The schematic diagram of the structure after the stepper motor, the driving pulley and the driven pulley are omitted; Figure 6 yes Figure 5 A schematic cross-sectional view of the structure; Figure 7 yes Figure 6 A magnified schematic diagram of the local structure at point A; Figure 8 It is a schematic cross-sectional view of the centrifugal grinding bin and the feeding pipe after assembly in the present invention.

[0028] Figure numerals: 1. separation chamber; 2. oil outlet; 3. stepper motor; 4. driving pulley; 5. cover plate; 6. feeding pipe; 7. driven pulley; 8. grinding layer; 9. stop rod; 10. rotating part; 11. mounting seat; 12. floating plate; 13. drain outlet; 14. hydrophilic and oleophobic filter plate; 15. telescopic sheet; 16. positioning pin; 17. connecting cylinder; 18. mounting chamber; 19. centrifugal grinding chamber; 20. flow blocking weir; 21. discharge port; 22. floating column; 23. spring; 24. guide rod; 25. blocking part; 26. limiting nut; 27. floating dispersion part; 28. through groove; 29. ​​spoiler; 30. spiral rolling groove; 31. limiting groove; 32. ball. 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 8 As shown, the present embodiment provides a skid-mounted reinjection water oil-water separation treatment device, comprising a separation bin 1 with a plurality of legs welded to the bottom, the top of the separation bin 1 is open and connected to a cover plate 5, the top of the separation bin 1 is coaxially rotatably connected to a feed pipe 6, the upper end of the feed pipe 6 is located above the separation bin 1, and its lower end extends to the separation bin 1, the upper end of the feed pipe 6 is rotatably connected to a rotary joint (not shown in the figure), the rotary joint is connected to an external oil-water delivery system, the external oil-water delivery system delivers the oil-water mixture to be treated to the rotary joint, and the rotary joint delivers it to the feed pipe 6, the lower end of the feed pipe 6 is coaxially fixedly connected to a centrifugal grinding bin 19, the oil-water mixture in the feed pipe 6 will enter the centrifugal grinding bin 19, the centrifugal grinding bin 19 is hollow inside and has a discharge port 21 on its periphery. A grinding layer 8 is welded to the inner cavity wall of the separation bin 1. A grinding gap is provided between the grinding layer 8 and the periphery of the centrifugal grinding bin 19. A mounting seat 11 is fixedly connected to the inner cavity wall of the separation bin 1. The mounting seat 11 is located below the centrifugal grinding bin 19. A hydrophilic and oleophobic filter plate 14 is fixedly connected to the upper side opening of the mounting seat 11. The hydrophilic and oleophobic filter plate 14 exhibits hydrophilic properties, that is, water can pass through the hydrophilic and oleophobic filter plate 14, but oil cannot pass through, thereby realizing the oil-water separation function. An oil outlet 2 is provided on the outer wall of the separation bin 1. The oil outlet 2 corresponds to the top surface of the hydrophilic and oleophobic filter plate 14. A drain port 13 is provided at the bottom of the separation bin 1. Control valves (not shown in the figure) are installed on both the oil outlet 2 and the drain port 13. Combination Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the periphery of the feeding pipe 6 is fixedly sleeved with a driven pulley 7, the outer wall of the separation chamber 1 is installed with a stepper motor 3, the output shaft of the stepper motor 3 is fixedly sleeved with a driving pulley 4, the driving pulley 4 and the driven pulley 7 are connected through a V-belt transmission, when the stepper motor 3 is working, the output shaft of the stepper motor 3 rotates, thereby driving the driving pulley 4 to rotate, and driving the driven pulley 7 to rotate, thereby driving the feeding pipe 6 to rotate, when the feeding pipe 6 rotates, it will drive the centrifugal grinding chamber 19 to rotate, so that the oil-water mixture fed into the centrifugal grinding chamber 19 can be affected by centrifugal force, and the oil-water mixture will be thrown out from the discharge port 21 to the surface of the grinding layer 8, and in addition, the upper side wall of the grinding layer 8 is provided with a flow-blocking weir 20 extending toward the inner side of the separation chamber 1, so that the oil-water mixture When the mixed liquid is thrown into the surface of the grinding layer 8, it is blocked by the blocking weir 20 and will not flow upward. In addition, a spoiler 29 is fixedly connected to the inner wall of the centrifugal grinding chamber 19, one end of the spoiler 29 extends to the inner edge of the mouth of the discharge port 21, and the other end of the spoiler 29 is fixedly connected to the inner wall of the centrifugal grinding chamber 19. By providing the spoiler 29, when the centrifugal grinding chamber 19 rotates, the oil-water mixture in the centrifugal grinding chamber 19 is disturbed by the spoiler 29, and the oil-water mixture flows along the surface of the spoiler 29 toward the mouth of the discharge port 21, thereby making the oil-water mixture in the centrifugal grinding chamber 19 flow quickly toward the mouth of the discharge port 21 during the rotation of the centrifugal grinding chamber 19, thereby improving the discharge of the oil-water mixture in the centrifugal grinding chamber 19; Combination Figures 2 to 6As shown, the bottom of the centrifugal grinding chamber 19 is coaxially fixed with the mounting chamber 18, the interior of the mounting chamber 18 is connected with the interior of the centrifugal grinding chamber 19, the inner cavity of the mounting chamber 18 is engaged with a floating dispersion portion 27, the floating dispersion portion 27 is in the shape of a cone with a pointed top and a wide bottom, the floating dispersion portion 27 slides freely up and down in the mounting chamber 18, the end face of the floating dispersion portion 27 is coaxially fixed with a floating column 22, the floating column 22 passes through the bottom of the mounting chamber 18 and slides freely vertically, an elastic member (not shown in the figure) is vertically installed in the mounting chamber 18, the elastic member elastically presses against the lower end face of the floating dispersion portion 27 upward, the end face of the hydrophilic and oleophobic filter plate 14 is coaxially rotatably connected with the rotating portion 10, the periphery of the rotating portion 10 is fixed with a telescopic piece 15, the telescopic piece 15 is in the shape of a spiral spring and its lower surface is in contact with the top surface of the hydrophilic and oleophobic filter plate 14, the other end of the telescopic piece 15 is fixed with a positioning pin 16, the positioning pin 1 6 is fixedly penetrated on the end surface of the hydrophilic oleophobic filter plate 14, so that when the rotating part 10 rotates around its own axis, it drives the expansion piece 15 to elastically contract or expand. The floating column 22 is connected to the rotating part 10 through a rotating assembly. The rotating assembly is used to drive the rotating part 10 to rotate when the floating column 22 moves vertically, so that the expansion piece 15 can be elastically contracted or elastically expanded accordingly. The expansion piece 15 can contract and expand, so that during the contraction and expansion of the expansion piece 15, the lower surface of the expansion piece 15 has an oil scraping effect on the top surface of the hydrophilic oleophobic filter plate 14. Since the expansion piece 15 is in the shape of a spiral spring, it can have a barrier effect on the oil, so that the top surface of the hydrophilic oleophobic filter plate 14 is not easy to produce an oil film. Even if an oil film is produced, the oil film is not complete, but sporadic, so as to avoid the oil film from affecting the water permeability of the hydrophilic oleophobic filter plate 14; The upper end surface of the rotating part 10 is coaxially connected with a connecting cylinder 17, the lower end of the floating column 22 penetrates the connecting cylinder 17 and rotates freely, and two balls 32 are rotatably embedded in the lower end of the floating column 22. The inner wall of the connecting cylinder 17 is provided with a spiral rolling groove 30 for the balls 32 to engage, and the balls 32 roll freely in the spiral rolling groove 30. The inner wall of the separation chamber 1 is horizontally fixed with a stop rod 9, and the floating column 22 is limited by the stop rod 9 to prevent the floating column 22 from rotating with the centrifugal grinding chamber 19 when the centrifugal grinding chamber 19 rotates. The periphery of the floating column 22 is provided with a limit groove 31 for the stop rod 9 to pass freely. Combination Figures 3 to 6As shown, a through slot 28 is provided at the bottom of the mounting seat 11, and two guide rods 24 are vertically fixedly connected to the bottom of the mounting seat 11. The two guide rods 24 are commonly sleeved with a floating plate 12. The end surface of the floating plate 12 is provided with a guide hole for the guide rods 24 to freely pass through. The lower end of the guide rod 24 is fixedly sleeved with a limit nut 26, and the upper surface of the limit nut 26 abuts against the bottom surface of the floating plate 12. A blocking portion 25 is fixedly connected to the upper end surface of the floating plate 12, and the blocking portion 25 corresponds to the through slot 28. The periphery of the guide rod 24 is sleeved with The spring 23, the two ends of the spring 23 in the elastic direction elastically press against the bottom surface of the mounting seat 11 and the top surface of the floating plate 12 respectively. When the floating plate 12 is subjected to the buoyancy, it will move upward and drive the blocking portion 25 to move upward, so that the blocking portion 25 blocks the through groove 28, thereby preventing the water in the separation chamber 1 from flowing back to the top surface of the hydrophilic and oleophobic filter plate 14 through the hydrophilic and oleophobic filter plate 14. The interior of the floating plate 12 in this embodiment is hollow, so that the floating plate 12 can float on the water surface when subjected to the buoyancy of the water.

[0031] The working principle of this embodiment is as follows: The external oil-water conveying system conveys the oil-water mixture to the rotary joint, and then conveys it to the feeding pipe 6 from the rotary joint, and then enters the centrifugal grinding chamber 19 from the feeding pipe 6, and starts the stepper motor 3. The output shaft of the stepper motor 3 rotates and drives the active pulley 4 to rotate. The active pulley 4 drives the driven pulley 7 to rotate, and then drives the feeding pipe 6 to rotate. When the feeding pipe 6 rotates, it drives the centrifugal grinding chamber 19 to rotate, so that the oil-water mixture in the centrifugal grinding chamber 19 is affected by the centrifugal force and flows toward the outside of the centrifugal grinding chamber 19. Due to the dispersing effect of the floating dispersing part 27, the oil-water mixture can quickly disperse and flow toward the direction of the discharge port 21; When the oil-water mixture is thrown into the inner wall of the grinding layer 8 from the discharge port 21, it will enter the grinding gap, and through the rotation of the centrifugal grinding chamber 19, the centrifugal grinding chamber 19 and the grinding layer 8 jointly grind the oil-water mixture entering the grinding gap. The oil-water mixture after grinding and demulsification flows into the top surface of the hydrophilic oleophobic filter plate 14, and the hydrophilic oleophobic filter plate 14 separates the oil-water mixture into water and oil. When the oil-water mixture is thrown into the centrifugal grinding chamber 19, it generates an impact force on the floating dispersion part 27, causing the floating dispersion part 27 to move downward, thereby causing the floating column 22 to slide in the connecting tube 17, and causing the ball 32 to roll in the spiral rolling groove 30. Since the floating column 22 is limited and stopped by the stop rod 9, the floating column 22 cannot rotate, thereby causing the connecting tube 17 to rotate. When the connecting tube 17 rotates, it will drive the rotating part 10 to rotate. When the rotating part 10 rotates, it will cause the telescopic sheet 15 to shrink and expand. The change makes the lower surface of the expansion piece 15 slide on the top surface of the hydrophilic oleophobic filter plate 14. During the sliding process, it is not easy to generate an oil film on the top surface of the hydrophilic oleophobic filter plate 14. Even if an oil film is generated, the oil film is not complete but sporadic, thereby avoiding the oil film from affecting the water permeability of the hydrophilic oleophobic filter plate 14. The flow rate of the oil-water mixture put into the centrifugal grinding chamber 19 is constantly changing, thereby causing the impact force on the floating dispersion part 27 to change, thereby causing the floating dispersion part 27 to reciprocate up and down. In addition, when the floating dispersion part 27 moves downward, the elastic member will be compressed and accumulate elastic potential energy. When the impact force on the floating dispersion part 27 is reduced, the elastic potential energy of the elastic member is released, thereby driving the floating dispersion part 27 to move upward, and causing the ball 32 to roll in the reverse direction in the spiral rolling groove 30, thereby driving the connecting tube 17 to rotate in the reverse direction, so that the expansion piece 15 can shrink or expand in the reverse direction. After the oil-water mixture passes through the hydrophilic oleophobic filter plate 14 for oil-water separation, the water passes through the hydrophilic oleophobic filter plate 14 and flows into the separation chamber 1 from the through groove 28, while the oil remains on the top surface of the hydrophilic oleophobic filter plate 14. When the water level in the separation chamber 1 rises, the buoyancy of the water will lift the float plate 12, and the float plate 12 drives the blocking portion 25 to move upward, so that the blocking portion 25 blocks the mouth of the through groove 28, thereby preventing the water in the separation chamber 1 that has been separated from the water and oil from passing through the hydrophilic oleophobic filter plate 14 and flowing back to the top surface of the hydrophilic oleophobic filter plate 14, thereby affecting the oil-water separation. When the float plate 12 moves upward, it will compress the spring 23, and the spring 23 accumulates elastic potential energy, so that when the water level in the separation chamber 1 drops, the elastic potential energy accumulated in the spring 23 is released, thereby driving the float plate 12 to move upward. The filter 25 is moved downward, and the sealing portion 25 is separated from the sealing state of the through groove 28, so that the water passing through the hydrophilic oleophobic filter plate 14 can flow into the separation chamber 1. After the separation is completed, the control valves on the oil outlet 2 and the drain port 13 are opened respectively, so that the oil on the top surface of the hydrophilic oleophobic filter plate 14 can flow out from the oil outlet 2 and be collected, while the water in the separation chamber 1 is discharged from the drain port 13. Compared with the demulsification method using a demulsifier in the prior art, this embodiment reduces the size of emulsion droplets in the oil-water mixture and improves the demulsification efficiency. In addition, the demulsified oil-water mixture is not easy to agglomerate again after grinding and demulsification. In addition, through the setting of the hydrophilic oleophobic filter plate 14, water can pass through the hydrophilic oleophobic filter plate 14 while the oil remains on the surface of the hydrophilic oleophobic filter plate 14, thereby achieving the effect of oil-water separation.

[0032] 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. A skid-mounted re-injection water oil-water separation treatment device, comprising a separation chamber (1) with an open top and connected to a cover plate (5), characterized in that: Also includes: A feeding pipe (6) is coaxially rotatably connected to the end surface of the cover plate (5), the lower end of the feeding pipe (6) extends to the separation bin (1) and is coaxially fixedly connected to a centrifugal grinding bin (19), the centrifugal grinding bin (19) is hollow inside and has a discharge port (21) formed on its periphery; A grinding layer (8) is provided on the inner wall of the separation chamber (1), and a grinding gap is provided between the grinding layer (8) and the periphery of the centrifugal grinding chamber (19); A mounting seat (11) is fixedly connected to the inner cavity wall of the separation chamber (1), and a hydrophilic and oleophobic filter plate (14) is fixedly connected to the upper opening of the mounting seat (11).

2. The skid-mounted reinjection water oil-water separation treatment device according to claim 1 is characterized in that: A driven pulley (7) is fixedly sleeved on the periphery of the feeding pipe (6), a stepper motor (3) is mounted on the outer wall of the separation bin (1), a driving pulley (4) is fixedly sleeved on the output shaft of the stepper motor (3), and the driving pulley (4) and the driven pulley (7) are connected via a V-belt transmission.

3. The skid-mounted reinjection water oil-water separation treatment device according to claim 1 is characterized in that: An oil outlet (2) is provided on the outer wall of the separation bin (1), the oil outlet (2) corresponds to the top surface of the hydrophilic and oleophobic filter plate (14), and a drainage outlet (13) is provided at the bottom of the separation bin (1).

4. The skid-mounted reinjection water oil-water separation treatment device according to claim 1 is characterized in that: The end of the feeding pipe (6) is rotatably connected to a rotary joint, and the rotary joint is connected to an external oil and water delivery system.

5. The skid-mounted reinjection water oil-water separation treatment device according to claim 1 is characterized in that: A spoiler (29) is fixedly connected to the inner wall of the centrifugal grinding chamber (19), one end of the spoiler (29) extends to the inner edge of the outlet (21), and the other end of the spoiler (29) is fixedly connected to the inner wall of the centrifugal grinding chamber (19).

6. The skid-mounted reinjection water oil-water separation treatment device according to claim 1 is characterized in that: The bottom of the centrifugal grinding chamber (19) is coaxially fixedly connected with a mounting chamber (18); the interior of the mounting chamber (18) is connected with the interior of the centrifugal grinding chamber (19); a floating dispersion portion (27) is engaged with the inner cavity of the mounting chamber (18); the floating dispersion portion (27) is in the shape of a cone with a pointed top and a wide bottom; the floating dispersion portion (27) is free to slide up and down in the mounting chamber (18); and an elastic drive unit for driving the floating dispersion portion (27) to move upward is provided on the mounting chamber (18).

7. The skid-mounted reinjection water oil-water separation treatment device according to claim 6 is characterized in that: The elastic drive unit comprises a floating column (22) coaxially fixed to the end face of the floating dispersion portion (27); the floating column (22) passes through the bottom of the installation bin (18) and is vertically free to slide and rotate; an elastic member is vertically installed in the installation bin (18); the elastic member elastically presses upward against the lower end face of the floating dispersion portion (27).

8. The skid-mounted reinjection water oil-water separation treatment device according to claim 7 is characterized in that: The end surface of the hydrophilic and oleophobic filter plate (14) is coaxially rotatably connected to a rotating part (10), and a telescopic piece (15) is fixedly connected to the periphery of the rotating part (10). The telescopic piece (15) is in the shape of a spiral spring and its lower surface is in contact with the top surface of the hydrophilic and oleophobic filter plate (14). The other end of the telescopic piece (15) is fixedly connected to a positioning pin (16), and the positioning pin (16) is fixedly penetrated through the end surface of the hydrophilic and oleophobic filter plate (14), so that when the rotating part (10) rotates around its own axis, it will drive the telescopic piece (15) to elastically contract or elastically expand. The floating column (22) and the rotating part (10) are connected via a rotating component. The rotating component is used to drive the rotating part (10) to rotate when the floating column (22) moves vertically, thereby causing the telescopic piece (15) to elastically contract or elastically expand accordingly.

9. The skid-mounted reinjection water oil-water separation treatment device according to claim 8 is characterized in that: The rotating assembly comprises a connecting tube (17) coaxially connected to the upper end surface of the rotating part (10); the lower end of the floating column (22) penetrates into the connecting tube (17) and rotates freely; two balls (32) are rotatably embedded in the lower end of the floating column (22); the inner wall of the connecting tube (17) is provided with a spiral rolling groove (30) for the balls (32) to engage; the balls (32) roll freely in the spiral rolling groove (30); a stop rod (9) is horizontally fixed to the inner wall of the separation chamber (1); and a limiting groove (31) is provided on the periphery of the floating column (22) for the stop rod (9) to pass freely.

10. The skid-mounted reinjection water oil-water separation treatment device according to claim 1, characterized in that: A through slot (28) is provided at the bottom of the mounting seat (11). Two guide rods (24) are vertically fixedly connected to the bottom of the mounting seat (11). A floating plate (12) is sleeved on the two guide rods (24). A guide hole for the guide rods (24) to pass freely is provided on the end surface of the floating plate (12). A limiting nut (26) is fixedly sleeved on the lower end of the guide rod (24). The upper surface of the limiting nut (26) abuts against the bottom surface of the floating plate (12). A blocking portion (25) is fixedly connected to the upper end surface of the floating plate (12). The blocking portion (25) corresponds to the through slot (28). A spring (23) is sleeved around the periphery of the guide rod (24). The two ends of the spring (23) in the direction of elastic force elastically abut against the bottom surface of the mounting seat (11) and the top surface of the floating plate (12) respectively.

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