Multi-cylinder combined graphene separation and purification device for oily sewage

Abstract

The application discloses a multi-cylinder combined oil-containing sewage graphene separation and purification device, and belongs to the technical field of oil-water separation devices.The device comprises a base, a separation tank and a graphene treatment tank, the separation tank and the graphene treatment tank are fixedly connected to the upper end of the base, a first treatment tank, a second treatment tank and a third treatment tank are arranged in the separation tank, an oil stain treatment tank and an oil stain collection tank are fixedly connected to the upper end of the base, the surface oil of water is efficiently pushed to an oil stain overflow pipe through reciprocating scraping plates, the conical grooves and the collection cylinder arranged at the bottom of the separation tank are used to automatically gather the precipitates, the screw rods are used to directionally push the precipitates to the extraction pump, the local accumulation and hardening of the precipitates are avoided, when the scraping plates are reset and rise, the scraping plates can produce slight vibration to shake off the surface residues, the continuous accumulation of the pollutants on the scraping plates is avoided, and the automation degree of equipment operation, the smoothness of pollution discharge and the continuous operation reliability are improved.

Description

Technical Field

[0001] This invention relates to the field of oil-water separation device technology, and more specifically, to a multi-cylinder combined graphene separation and purification device for oily wastewater. Background Technology

[0002] Graphene separation and purification equipment refers to purification equipment that uses graphene material as the core adsorption medium and utilizes graphene's huge specific surface area and excellent oleophilic and hydrophobic properties to adsorb and separate emulsified oil and dissolved oil in oily wastewater. The equipment usually consists of a pretreatment unit, a graphene adsorption unit, and a solid-liquid separation unit, which can effectively reduce the oil content in wastewater and make the effluent meet the discharge and reuse standards.

[0003] An industrial wastewater oil-water separation system, with announcement number CN218145958U, includes a separation tank fixedly installed on a horizontal ground and a graphene treatment tank connected to the separation tank via a connecting pipe. One end of the separation tank along its long side is provided with a first wastewater treatment tank for preliminary settling and separation of wastewater. A skimming pipe is fixedly installed at the top of the first wastewater treatment tank to skim oily impurities floating on the top of the first wastewater treatment tank into an oily wastewater treatment tank located within the separation tank. An oily wastewater discharge tank is fixedly installed within the oily wastewater treatment tank to discharge oily impurities from the separation tank. An oil filtration assembly is fixedly installed within the oily wastewater treatment tank to filter oily impurities from the oily wastewater treatment tank into the oily wastewater discharge tank. The system's technical advantages are: simple structure and good oil-water separation effect.

[0004] However, the above-mentioned solution only sets up oil skimming pipes at the top of the first and second sewage treatment tanks to skim off the floating oil through natural overflow. This method can only passively wait for the oil to float to the surface and flow into the oil skimming pipes by itself based on the liquid level difference. It lacks active means of driving away and collecting oil, resulting in a large amount of oil remaining on the surface of the first and second treatment tanks and being difficult to remove effectively. This leads to low oil cleaning efficiency. Although a discharge valve is set at the bottom of the separation tank to discharge sewage and sediment to the graphene treatment tank, this structure can only extract sediment near the discharge valve. Sediment far from the discharge valve cannot be effectively cleaned. After long-term operation, these sediments far from the discharge valve will gradually accumulate and harden at the bottom of the tank. This not only occupies the effective volume and affects the sewage treatment efficiency, but the hardened sediment is also difficult to discharge by itself through the discharge valve. It needs to be manually emptied and cleaned regularly, which increases the maintenance difficulty and labor costs. Moreover, shutdown for cleaning will affect the continuous operation of the entire system.

[0005] Therefore, we have made improvements to this and proposed a multi-cylinder combined graphene separation and purification device for oily wastewater. Summary of the Invention

[0006] In view of the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a multi-cylinder combined graphene separation and purification device for oily wastewater.

[0007] To solve the above problems, the technical solution adopted by the present invention is as follows: a multi-cylinder combined graphene separation and purification device for oily wastewater, comprising a base, a separation tank, and a graphene treatment tank. The separation tank and the graphene treatment tank are both fixedly connected to the upper end of the base. The separation tank contains a first treatment tank, a second treatment tank, and a third treatment tank. An oily wastewater treatment tank and an oily wastewater collection tank are fixedly connected to the upper end of the base. The upper side walls of the first treatment tank and the second treatment tank are both connected to oily wastewater overflow pipes. Both oily wastewater overflow pipes are connected to the oily wastewater treatment tank. An oil scraping component is installed at the upper end of the separation tank to scrape oily wastewater towards the two oily wastewater overflow pipes. A sewage discharge component is provided at the lower end of the separation tank to facilitate the discharge of sediments from the bottom of the first treatment tank, the second treatment tank, and the third treatment tank. An oil filter component is installed at the upper end of the oily wastewater treatment tank.

[0008] Preferably, the oil scraping assembly includes two support frames fixedly connected to the upper end of the separation tank. The two support frames are symmetrically arranged, and each support frame has a sliding groove. A movable frame is slidably connected in both sliding grooves. A one-way screw is rotatably connected to the inner wall of one of the sliding grooves. The movable frame is threaded onto the outside of the one-way screw. A motor is fixedly connected to the side wall of the support frame with the one-way screw. The output end of the motor rotates through the support frame and is fixedly connected to one end of the one-way screw. Multiple guide rods slide through the movable frame. A lifting plate is fixedly connected to the lower end of the multiple guide rods. Two sets of guide rods slide through the lifting plate. An oil scraper is fixedly connected to the lower end of each set of guide rods. A vibration assembly is installed on the upper end of each set of guide rods.

[0009] Preferably, a movable plate is fixedly connected to the upper end of multiple guide rods. A transmission rod is rotatably connected to the inner wall of the movable frame. Multiple elliptical plates are fixedly sleeved on the outside of the transmission rod, and the multiple elliptical plates are all attached to the lower end face of the movable plate. A transmission rod is rotatably connected to one side of the movable frame. The output end of the transmission rod is rotatably inserted through the movable frame and fixedly connected to one end of the transmission rod. A one-way bearing is fixedly sleeved on the outside of the transmission rod. A spur gear is fixedly sleeved on the outside of the one-way bearing. A rack is fixedly connected to the upper end of one of the support frames. The rack and the spur gear mesh with each other. A ratchet is rotatably connected to the other side of the movable frame. The output end of the ratchet is rotatably inserted through the movable frame and fixedly connected to the other end of the transmission rod. A transmission rod is rotatably connected to the other side of the movable frame. A pawl is fixedly sleeved on the outside of the transmission rod. The pawl and the ratchet engage.

[0010] Preferably, a wedge block is fixedly connected to the upper end of another support frame, a connecting plate is fixedly connected to the side wall of the pawl, and a pawl ball is fixedly connected to the side wall of the connecting plate. The pawl ball faces the inclined surface of the wedge block. A torsion spring is sleeved on the outside of the transmission rod three. The two ends of the torsion spring one are fixedly connected to the side wall of the transmission rod three and the side wall of the moving frame, respectively. Two torsion springs two are symmetrically arranged on the outside of the transmission rod one. The two ends of the two torsion springs two are fixedly connected to the side wall of the transmission rod one and the side wall of the moving frame, respectively.

[0011] Preferably, a wedge block is fixedly connected to the upper end of another support frame, a connecting plate is fixedly connected to the side wall of the pawl, and a pawl ball is fixedly connected to the side wall of the connecting plate. The pawl ball faces the inclined surface of the wedge block. A torsion spring is sleeved on the outside of the transmission rod three. The two ends of the torsion spring one are fixedly connected to the side wall of the transmission rod three and the side wall of the moving frame, respectively. Two torsion springs two are symmetrically arranged on the outside of the transmission rod one. The two ends of the two torsion springs two are fixedly connected to the side wall of the transmission rod one and the side wall of the moving frame, respectively.

[0012] Preferably, the sewage discharge assembly includes a partition plate fixedly connected to the inner wall of the bottom of the separation tank. The inner wall of the bottom of the separation tank is provided with two conical grooves. Two collection cylinders are fixedly connected to the lower end of the separation tank. Each of the two grooves has a discharge outlet at its lower end. The two discharge outlets are respectively connected to the two collection cylinders. A screw rod is rotatably connected to the inner wall of each of the two collection cylinders. One end of each of the two collection cylinders is connected to a first extraction pump. The output ends of the two first extraction pumps are connected to a sewage discharge pipe. The discharge end of the sewage discharge pipe is connected to the graphene treatment tank.

[0013] Preferably, a mounting frame is fixedly connected to the lower part of the side wall of the separation tank, and a second motor is fixedly installed on the mounting frame. The other ends of the two collection cylinders are rotatably connected to sprockets, and chains are sleeved on the outside of the two sprockets. The output ends of the two sprockets rotatably pass through the two collection cylinders and are fixedly connected to one end of the two spiral rods respectively. The output end of the second motor rotatably passes through the mounting frame and is fixedly connected to one end of one of the sprockets.

[0014] Preferably, an annular friction plate is slidably sleeved on the outside of the transmission rod II, the annular friction plate is attached to one side wall of the spur gear, and multiple springs II and multiple telescopic rods are fixedly connected between the side wall of the moving frame and the side wall of the annular friction plate, with the multiple telescopic rods respectively sleeved inside the multiple springs II.

[0015] Preferably, the separation tank is connected to the middle of the side away from the graphene treatment tank by an injection pipe, the lower end of the oil treatment tank is connected to a conveying pipe, the outlet end of the conveying pipe is connected to the third treatment tank, and a pump is installed on the conveying pipe.

[0016] Preferably, both of the oil scrapers have an oleophobic coating on their exterior, and the two oil scrapers are located above the first treatment tank and the second treatment tank, respectively.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention uses a motor to drive a one-way screw to move the mobile frame back and forth, enabling the oil scraper to continuously and efficiently push the oil floating on the surface of the first and second treatment tanks towards the oil overflow pipe. This significantly improves the automation level and processing efficiency of oil-water separation. At the same time, with the cooperation of a one-way bearing, a spur gear, a rack and pinion, and a ratchet and pawl, the oil scraper automatically rises during the return stroke and automatically falls and submerges at the reset end. This avoids the oil scraper dragging the oil backward during the return stroke, which would reduce the separation effect, and also realizes the cyclical oil scraping action. The structure is ingenious and the operation is reliable.

[0018] 2. This invention, by setting a conical groove at the bottom of the separation tank and connecting it to a collection cylinder, allows the sediment at the bottom of the first, second, and third treatment tanks to automatically converge under gravity. Then, the sediment is slowly pushed to the extraction pump by the slow rotation of the screw driven by the second motor, thereby evenly transporting the wastewater containing sediment to the graphene treatment tank for subsequent purification. This effectively avoids the local accumulation and caking of sediment at the bottom of the separation tank, ensuring the cleanliness and smooth discharge of the separation tank during long-term operation, and significantly reducing the frequency of manual cleaning.

[0019] 3. When the scraper blade rises and resets with the moving frame, the impact cam rotates through the speed-increasing gear set driven by rack two. Combined with the elasticity of spring one, the support plate drives guide rod two and scraper blade to produce slight vibration, thereby quickly shaking off the residual oil and sewage on the surface of the scraper blade. This prevents pollutants from being carried back into the treatment tank by the scraper blade and away from the oil overflow pipe. At the same time, it can also prevent pollutants from continuously accumulating on the scraper blade and affecting the subsequent oil scraping effect, significantly improving the reliability of continuous operation of the equipment. Attached Figure Description

[0020] Figure 1 A schematic diagram of the main structure of a multi-cylinder combined graphene separation and purification device for oily wastewater provided in this application; Figure 2 Another perspective schematic diagram of the main structure of a multi-cylinder combined oily wastewater graphene separation and purification device provided in this application; Figure 3 A schematic diagram of the oil skimming component structure of a multi-cylinder combined graphene separation and purification device for oily wastewater provided in this application; Figure 4 A schematic diagram of the structure of a multi-cylinder combined oily wastewater graphene separation and purification device provided in this application after the actuating ball moves to the inclined surface of the wedge block; Figure 5A schematic diagram of a spur gear and annular friction plate structure for a multi-cylinder combined graphene separation and purification device for oily wastewater provided in this application; Figure 6 A structural cross-sectional view of a multi-cylinder combined graphene separation and purification device for oily wastewater provided in this application; Figure 7 A schematic diagram of the sewage discharge component structure of a multi-cylinder combined graphene separation and purification device for oily wastewater provided in this application; Figure 8 A schematic diagram of the mounting frame structure for a multi-cylinder combined graphene separation and purification device for oily wastewater provided in this application; Figure 9 A schematic diagram of the extraction pump and sewage pipe structure of a multi-cylinder combined graphene separation and purification device for oily wastewater provided in this application. Figure 10 This application provides a schematic diagram of the vibration component structure of a multi-cylinder combined graphene separation and purification device for oily wastewater.

[0021] In the diagram: 1. Base; 2. Separation tank; 3. Graphene treatment tank; 4. First treatment tank; 5. Second treatment tank; 6. Third treatment tank; 7. Oil sludge treatment tank; 8. Oil sludge collection tank; 9. Oil sludge overflow pipe; 10. Oil scraping assembly; 1001. Support frame; 1002. Sliding groove; 1003. Moving frame; 1004. One-way screw; 1005. Motor 1; 1006. Guide rod 1; 1007. Lifting plate; 1008. Guide rod 2; 1009. Oil scraper; 1010. Moving plate; 1011. Transmission rod 1; 1012. Elliptical plate; 1013. Transmission rod 2; 1014. One-way bearing; 1015. Spur gear 1; 1016. Rack 1; 1017. Ratchet; 1018. Transmission rod 3; 1019. Pawl; 020. Wedge block; 1021. Connecting plate; 1022. Actuating ball; 1023. Torsion spring one; 1024. Torsion spring two; 11. Sewage discharge assembly; 1101. Divider plate; 1102. Collection cylinder; 1103. Helical rod; 1104. Extraction pump one; 1105. Sewage pipe; 1106. Mounting bracket; 1107. Motor two; 1108. Sprocket; 1109. Chain; 12. Oil filter assembly; 13. Vibration assembly; 1301. Support plate; 1302. Spring one; 1303. Vertical plate; 1304. Impact cam; 1305. Spur gear two; 1306. Spur gear three; 1307. Rack two; 14. Annular friction plate; 15. Spring two; 16. Telescopic rod; 17. Injection pipe; 18. Delivery pipe; 19. Liquid pump. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0023] Please see Figures 1-10 As shown, the present invention provides a technical solution: a multi-cylinder combined graphene separation and purification device for oily wastewater, including a base 1, a separation tank 2 and a graphene treatment tank 3. The separation tank 2 and the graphene treatment tank 3 are both fixedly connected to the upper end of the base 1. The separation tank 2 is provided with a first treatment tank 4, a second treatment tank 5 and a third treatment tank 6. The upper end of the base 1 is fixedly connected to an oil pollution treatment tank 7 and an oil pollution collection tank 8. The upper side walls of the first treatment tank 4 and the second treatment tank 5 are both connected to oil pollution overflow pipes 9. Both oil pollution overflow pipes 9 are connected to the oil pollution treatment tank 7. The upper end of the separation tank 2 is equipped with an oil scraping component 10 to scrape oil pollution towards the two oil pollution overflow pipes 9. The lower end of the separation tank 2 is provided with a sewage discharge component 11 to facilitate the discharge of sediment from the bottom of the first treatment tank 4, the second treatment tank 5 and the third treatment tank 6. The upper end of the oil pollution treatment tank 7 is equipped with an oil filter component 12.

[0024] Furthermore, the separation tank 2, as the main container of the device, is used to contain the oily wastewater to be treated and to provide space for oil-water separation and sedimentation. The graphene treatment tank 3 is fixedly connected to the upper end of the base 1 and is used to receive the sediment discharged from the sewage discharge component 11 and perform deep graphene purification treatment. The base 1 provides a stable installation support for the separation tank 2 and the graphene treatment tank 3. The first treatment tank 4, the second treatment tank 5, and the third treatment tank 6 opened in the separation tank 2 are used to sequentially contain wastewater and gradually complete oil-water stratification and sedimentation in each tank. The oil treatment tank 7 is fixedly connected to the upper end of the base 1 and is used to receive the oily liquid discharged from the first treatment tank 4 and the second treatment tank 5 through the oil overflow pipe 9 and perform oil separation treatment. The oil collection tank 8 is fixedly connected to the upper end of the base 1 and is used to collect... The oil sludge treatment tank 7 treats the separated oil sludge. The oil sludge overflow pipe 9 is connected to the upper side wall of the first treatment tank 4 and the second treatment tank 5, and is used to guide the oil sludge floating on the surface of the first treatment tank 4 and the second treatment tank 5 to overflow into the oil sludge treatment tank 7. The oil scraping assembly 10 is installed at the upper end of the separation tank 2, and is used to scrape the oil sludge floating on the surface of the first treatment tank 4 and the second treatment tank 5 towards the oil sludge overflow pipe 9. The sewage discharge assembly 11 is set at the lower end of the separation tank 2, and is used to collect and discharge the sediment deposited at the bottom of the first treatment tank 4, the second treatment tank 5 and the third treatment tank 6 into the graphene treatment tank 3. The oil filter assembly 12 is installed at the upper end of the oil sludge treatment tank 7, and is used to separate the oil-containing liquid in the oil sludge treatment tank 7 into oil and water, so that the separated oil sludge is collected into the oil sludge collection tank 8.

[0025] Both the graphene treatment tank 3 and the oil filtration assembly 12 are existing technologies. The graphene treatment tank 3 contains a number of graphene adsorption plates evenly arranged within it. These plates receive wastewater from the separation tank 2 after preliminary sedimentation and oil skimming via a connecting pipe. The graphene material's strong adsorption properties on residual oil and impurities in the wastewater are used for deep purification. The treated water, meeting the standards, is discharged from the drainage end of the graphene treatment tank 3, thus completing the final purification process of the oily wastewater. The oil filtration assembly 12 includes a fixed base fixedly mounted on the top of the oil treatment tank 7, a rotating base fixedly mounted on the fixed base, a rotating shaft rotatably connected within the rotating base, and evenly spaced... The system consists of several oil filter discs partially immersed in the oil treatment tank 7 on a rotating shaft, scraper plates fixedly mounted on a fixed base and in contact with the two oil filter surfaces of the oil filter discs, scraper channels fixedly mounted on the scraper plates for guiding the scraped oil into the oil discharge tank, and a drive motor connected to the rotating shaft based on a chain drive assembly and driving its rotation. The oil filter discs rotate continuously under the drive motor, adsorbing the oil impurities floating in the oil treatment tank 7 onto the surface of the oil filter discs, which are then scraped off by the scraper plates attached to the two surfaces of the oil filter discs. The scraped oil flows into the oil collection tank 8 along the scraper channels, thereby achieving continuous separation and collection of oil and water, which will not be elaborated further here.

[0026] In the preferred embodiment of this technical solution, please refer to Figures 1-5 As shown, the oil scraping assembly 10 includes two support frames 1001 fixedly connected to the upper end of the separation tank 2. The two support frames 1001 are symmetrically arranged, and each support frame 1001 has a sliding groove 1002. A movable frame 1003 is slidably connected in both sliding grooves 1002. A one-way screw 1004 is rotatably connected to the inner wall of one of the sliding grooves 1002. The movable frame 1003 is threaded onto the outside of the one-way screw 1004. A fixed connection is made to the side wall of the support frame 1001 with the one-way screw 1004. Motor 1005, the output end of motor 1005 rotates through support frame 1001 and is fixedly connected to one end of one-way screw 1004. Multiple guide rods 1006 slide through the moving frame 1003. The lower ends of multiple guide rods 1006 are fixedly connected to lifting plate 1007. Two sets of guide rods 1008 slide through the lifting plate 1007. The lower ends of both sets of guide rods 1008 are fixedly connected to oil scraper 1009. Vibration component 13 is installed on the upper ends of both sets of guide rods 1008. Multiple guide rods 1006 are fixedly connected to a movable plate 1010 at their upper ends. A transmission rod 1011 is rotatably connected to the inner wall of the movable frame 1003. Multiple elliptical plates 1012 are fixedly sleeved on the outside of the transmission rod 1011, and the multiple elliptical plates 1012 are all attached to the lower end face of the movable plate 1010. A transmission rod 2 1013 is rotatably connected to one side of the movable frame 1003. The output end of the transmission rod 2 1013 rotatably passes through the movable frame 1003 and is fixedly connected to one end of the transmission rod 1011. A one-way bearing 1014 is fixedly sleeved on the outside of the transmission rod 2 1013. 014 is externally fixedly fitted with a spur gear 1015. One of the support frames 1001 is fixedly connected to a rack 1016. The rack 1016 and the spur gear 1015 mesh with each other. The other side of the moving frame 1003 is rotatably connected to a ratchet 1017. The output end of the ratchet 1017 rotatably passes through the moving frame 1003 and is fixedly connected to the other end of the transmission rod 1011. The other side of the moving frame 1003 is rotatably connected to a transmission rod 3 1018. The transmission rod 3 1018 is externally fixedly fitted with a pawl 1019. The pawl 1019 and the ratchet 1017 are engaged.

[0027] Furthermore, the support frame 1001 provides mounting support for the entire oil scraping assembly 10. A sliding groove 1002 is formed on the support frame 1001 to guide and limit the reciprocating sliding of the movable frame 1003. The movable frame 1003 is slidably connected within two sliding grooves 1002 to support related components and drive the oil scraper 1009 to reciprocate along the support frame 1001. A one-way screw 1004 is rotatably connected to the inner wall of one of the sliding grooves 1002. The movable frame 1003 is threaded onto the outside of the one-way screw 1004 to convert the rotational motion of the motor 1005 into the linear motion of the movable frame 1003. The motor 1005 is fixedly connected to the side wall of the support frame 1001 where the one-way screw 1004 is located. The output end is fixedly connected to one end of the one-way screw 1004, used to drive the one-way screw 1004 to rotate forward and backward, thereby driving the moving frame 1003 to slide back and forth. An encoder is installed inside the motor 1005; after rotating a specified number of times, the motor 1005 can reverse, thereby driving the moving frame 1003 to move back and forth. Guide rod 1006 slides through the moving frame 1003 and its lower end is fixedly connected to a lifting plate 1007, used to guide the lifting movement of the lifting plate 1007 in the vertical direction and transmit lifting power. The lifting plate 1007 is fixedly connected to the lower end of multiple guide rods 1006, used to support guide rod 1008 and the oil scraper 1009 and drive them to lift synchronously. Guide rod 1008 slides through the lifting plate 1007 and its lower end... An oil scraper 1009 is fixedly connected to the end of the moving frame 1003, providing vertical sliding guidance and transmitting the vibration of the vibration assembly 13. The oil scraper 1009 is fixedly connected to the lower ends of two sets of guide rods 1008, used to scrape the floating oil on the water surface towards the oil overflow pipe 9 when the moving frame 1003 slides. The moving plate 1010 is fixedly connected to the upper ends of multiple guide rods 1006, used to bear the lifting force of the elliptical plate 1012 and transmit the force to the lifting plate 1007 through the guide rods 1006 to lift the oil scraper 1009. A transmission rod 1011 is rotatably connected to the inner wall of the moving frame 1003 and has multiple elliptical plates 1012 fixedly sleeved on its outside, used to drive the elliptical plates 1012 to rotate in order to control the moving plate 1010. The lifting mechanism includes an elliptical plate 1012 fixedly sleeved outside the transmission rod 1011 and attached to the lower end face of the moving plate 1010. It is used to lift and release the moving plate 1010 by rotating its long and short diameter ends. A second transmission rod 1013 is rotatably connected to one side of the moving frame 1003, and its output end is fixedly connected to one end of the first transmission rod 1011. It is used to transmit power from the spur gear 1015 to the first transmission rod 1011. A one-way bearing 1014 is fixedly sleeved outside the second transmission rod 1013, and a spur gear 1015 is fixedly sleeved on its exterior. It is used to allow free rotation when the moving frame 1003 slides forward, preventing the first transmission rod 1011 from rotating, and to lock when the moving frame 1003 slides backward, transmitting power to the second transmission rod 1013.A spur gear 1015 is fixedly sleeved outside the one-way bearing 1014 and meshes with a rack 1016. It generates rotational power by meshing with the fixed rack 1016 during the sliding of the moving frame 1003. A ratchet 1017 is rotatably connected to the other side of the moving frame 1003, and its output end is fixedly connected to the other end of the transmission rod 1011. It engages with a pawl 1019 to limit the one-way reverse rotation of the transmission rod 1011. The pawl 1019 is fixedly sleeved outside the transmission rod 1018 and engages with the ratchet 1017. It locks the ratchet 1017 to prevent the elliptical plate 1012 from prematurely resetting under the action of the torsion spring 1024. The transmission rod 1018 is rotatably connected to the other side of the moving frame 1003 and has a pawl 1019 fixedly sleeved on its exterior. It carries the pawl 1019 and drives it to rotate to release the engagement with the ratchet 1017.

[0028] In the preferred embodiment of this technical solution, please refer to Figure 3 , Figure 4 and Figure 5 As shown, another support frame 1001 has a wedge block 1020 fixedly connected to its upper end, a connecting plate 1021 fixedly connected to the side wall of the pawl 1019, and a toggle ball 1022 fixedly connected to the side wall of the connecting plate 1021. The toggle ball 1022 faces the inclined surface of the wedge block 1020. A torsion spring 1023 is sleeved on the outside of the transmission rod 3 1018. The two ends of the torsion spring 1023 are fixedly connected to the side wall of the transmission rod 3 1018 and the side wall of the moving frame 1003, respectively. Two torsion springs 2 1024 are symmetrically arranged on the outside of the transmission rod 1 1011. The two ends of the two torsion springs 2 1024 are fixedly connected to the side wall of the transmission rod 1 1011 and the side wall of the moving frame 1003, respectively.

[0029] Furthermore, the wedge block 1020 is fixedly connected to the upper end of another support frame 1001, and is used to cooperate with the actuating ball 1022 through its inclined surface. When the moving frame 1003 returns to its end point, it pushes the actuating ball 1022 to generate displacement. The connecting plate 1021 is fixedly connected to the side wall of the pawl 1019, and is used to transmit the displacement of the actuating ball 1022 to the pawl 1019, causing the pawl 1019 to rotate to release the engagement with the ratchet 1017. The actuating ball 1022 is fixedly connected to the side wall of the connecting plate 1021 and faces the inclined surface of the wedge block 1020, and is used to contact and cooperate with the inclined surface of the wedge block 1020 during the resetting process of the moving frame 1003, converting the linear motion of the moving frame 1003 into the rotation of the pawl 1019. The torsion spring 10... 23 is sleeved on the outside of transmission rod 3 1018 and fixedly connected at both ends to the side wall of transmission rod 3 1018 and the side wall of moving frame 1003, respectively. It is used to provide torsional restoring force for transmission rod 3 1018, so that pawl 1019 automatically returns to the initial position of engaging with ratchet 1017 after disengaging from wedge block 1020. Two torsion springs 2 1024 are provided and symmetrically distributed. They are sleeved on the outside of transmission rod 1 1011 and fixedly connected at both ends to the side wall of transmission rod 1 1011 and the side wall of moving frame 1003, respectively. They are used to store elastic potential energy when elliptical plate 1012 rotates to the long axis end, and release energy when pawl 1019 releases engagement with ratchet 1017, driving transmission rod 1 1011 to reverse so that elliptical plate 1012 returns to the short axis end.

[0030] In the preferred embodiment of this technical solution, please refer to Figure 5 and Figure 10 As shown, the vibration assembly 13 includes a support plate 1301 fixedly connected to the upper end of a set of guide rods 1008. Multiple springs 1302 are fixedly connected to the upper end of the lifting plate 1007 and the lower end of the support plate 1301. A vertical plate 1303 is fixedly connected to the upper end of the lifting plate 1007. An impact cam 1304 is rotatably connected to one side wall of the vertical plate 1303. A spur gear 1305 and a spur gear 1306 are rotatably connected to the other side of the vertical plate 1303. The pitch circle diameter of the spur gear 1306 is larger than that of the spur gear 1305. The spur gear 1305 and the spur gear 1306 mesh with each other. The output end of the spur gear 1305 rotatably passes through the vertical plate 1303 and is fixedly connected to one end of the impact cam 1304. A rack 1307 is fixedly connected to the lower end of the moving frame 1003. The rack 1307 and the spur gear 1306 mesh with each other.

[0031] Furthermore, the support plate 1301 is fixedly connected to the upper end of a set of guide rods 1008, which is used to transmit the elastic force of the spring 1302 and the impact force of the impact cam 1304 to the guide rods 1008 and the scraper 1009. Multiple springs 1302 are provided and fixedly connected between the upper end of the lifting plate 1007 and the lower end of the support plate 1301. They have high rigidity and will not deform when the lifting plate 1007 rises and falls, ensuring the height stability of the scraper 1009. They only undergo elastic deformation when the impact cam 1304 rotates and impacts, causing the support plate 1301 to vibrate up and down at high frequency. The upright plate 1303 is fixedly connected to the upper end of the lifting plate 1007, providing mounting support for the impact cam 1304, spur gear 1305, and spur gear 1306. The impact cam 1304 is rotatably connected to the upright plate 1301. 3. One side wall is used to rotate and intermittently impact the support plate 1301 under the drive of spur gear 2 1305, so that the high-rigidity spring 1302 will produce instantaneous elastic deformation, thereby forming high-frequency micro-amplitude vibration. Spur gear 2 1305 and spur gear 3 1306 are rotatably connected to the other side of the vertical plate 1303 and mesh with each other. The pitch circle diameter of spur gear 3 1306 is larger than that of spur gear 2 1305. It is used to increase the power transmitted by rack 2 1307 and drive the impact cam 1304 to rotate quickly, so that the impact frequency is higher and the vibration is more intense. Rack 2 1307 is fixedly connected to the lower end of the moving frame 1003 and meshes with spur gear 3 1306. It is used to generate rotational driving force by meshing with spur gear 3 1306 during the movement of the moving frame 1003, providing a power source for the entire vibration assembly 13.

[0032] In the preferred embodiment of this technical solution, please refer to Figures 6-8 As shown, the sewage discharge assembly 11 includes a partition plate 1101 fixedly connected to the inner wall of the bottom of the separation tank 2. The inner wall of the bottom of the separation tank 2 is provided with two conical grooves. Two collection cylinders 1102 are fixedly connected to the lower end of the separation tank 2. Each groove has a discharge outlet at its lower end. The two discharge outlets are respectively connected to the two collection cylinders 1102. The inner walls of the two collection cylinders 1102 are rotatably connected with a screw rod 1103. One end of each collection cylinder 1102 is connected to a pump 1104. The output ends of the two pumps 1104 are connected to a sewage discharge pipe 1105. The discharge end of the sewage discharge pipe 1105 is connected to the graphene treatment tank 3. A mounting frame 1106 is fixedly connected to the lower side wall of the separation tank 2. A motor 1107 is fixedly mounted on the mounting frame 1106. The other ends of the two collection cylinders 1102 are rotatably connected to sprockets 1108. Chains 1109 are sleeved on the outside of the two sprockets 1108. The output ends of the two sprockets 1108 rotate through the two collection cylinders 1102 and are fixedly connected to one end of the two spiral rods 1103. The output end of the motor 1107 rotates through the mounting frame 1106 and is fixedly connected to one end of one of the sprockets 1108.

[0033] Furthermore, the partition plate 1101 is fixedly connected to the inner wall of the bottom of the separation tank 2 to separate the bottoms of the first treatment tank 4, the second treatment tank 5, and the third treatment tank 6. It also provides a guiding structure for the conical grooves to collect sediment. Two conical grooves are provided on the inner wall of the bottom of the separation tank 2 to allow sediment from the bottom of each treatment tank to naturally converge to the discharge outlet via an inclined surface, preventing large-scale accumulation of sediment in the flat area. The collection cylinder 1102 is fixedly connected to the lower end of the separation tank 2 and communicates with the conical grooves through the discharge outlet. It is used to contain and temporarily store the sediment discharged from the grooves, providing a closed channel for the push of the screw rod 1103. The screw rod 1103 is rotatably connected to the inner wall of the collection cylinder 1102, continuously pushing the sediment in the collection cylinder 1102 axially to the inlet of the extraction pump 1104 during rotation, preventing sediment from clogging and accumulating in the collection cylinder 1102. The extraction pump 1104 is connected to one end of the collection cylinder 1102 and is used to pump the sediment pushed by the screw rod 1103. Wastewater containing sediment is sucked in, pressurized, and discharged. The discharge pipe 1105 connects to the output ends of two extraction pumps 1104, with the discharge end connected to the graphene treatment tank 3. This is used to combine the wastewater containing sediment discharged from the two extraction pumps 1104 and uniformly transport it to the graphene treatment tank 3. The mounting frame 1106 is fixedly connected to the lower side wall of the separation tank 2, providing a fixed mounting support for the motor 1107. The motor 1107 is fixedly mounted on the mounting frame 1106, with its output end connected to the graphene treatment tank 3. A sprocket 1108 is fixedly connected to drive the sprocket 1108 and chain 1109 to rotate, thereby driving the two screw rods 1103 to rotate synchronously. The sprocket 1108 is rotatably connected to the other end of the collection cylinder 1102 and its output end is fixedly connected to one end of the screw rod 1103. The two sprockets 1108 are fitted with a chain 1109, which is used to synchronously transmit the power of the motor 1107 to the screw rods 1103 in the two collection cylinders 1102, ensuring that the two screw rods 1103 rotate synchronously.

[0034] In the preferred embodiment of this technical solution, please refer to Figure 5 As shown, an annular friction plate 14 is slidably sleeved on the outside of the transmission rod 1013. The annular friction plate 14 is attached to the side wall of the spur gear 1015. Multiple springs 15 and multiple telescopic rods 16 are fixedly connected between the side wall of the moving frame 1003 and the side wall of the annular friction plate 14. The multiple telescopic rods 16 are respectively sleeved in the multiple springs 15.

[0035] Furthermore, the annular friction plate 14 is slidably sleeved on the outside of the transmission rod 1013 and fits against the side wall of the spur gear 1015, used to apply a continuous frictional force to the spur gear 1015. After the pawl 1019 releases its restraint on the ratchet 1017, when the torsion spring 1024 releases energy to drive the transmission rod 1011 and the transmission rod 1013 to rotate, it prevents the spur gear 1015 from spinning freely due to inertia, ensuring that the spur gear 1015 and the rack 1016 always maintain the correct meshing alignment so that they can mesh normally when the moving frame 1003 slides next time. Multiple springs 15 are provided and fixed. A fixed connection is established between the side wall of the movable frame 1003 and the side wall of the annular friction plate 14 to provide a continuous elastic thrust to the annular friction plate 14, ensuring that it always fits tightly against the side wall of the spur gear 1015 to maintain stable friction. Multiple telescopic rods 16 are provided and are respectively sleeved in multiple springs 15. Both ends are fixedly connected to the side wall of the movable frame 1003 and the side wall of the annular friction plate 14, respectively, to provide guidance for the extension and retraction of the springs 15, prevent the springs 15 from bending or shifting during compression and reset, and ensure that the annular friction plate 14 is always facing the side wall of the spur gear 1015 and the contact pressure is uniform.

[0036] In the preferred embodiment of this technical solution, please refer to Figure 1 As shown, a liquid injection pipe 17 is connected to the middle of the side of the separation tank 2 away from the graphene treatment tank 3, and a conveying pipe 18 is connected to the lower end of the oil treatment tank 7. The liquid outlet of the conveying pipe 18 is connected to the third treatment tank 6, and a liquid pump 19 is installed on the conveying pipe 18.

[0037] Furthermore, the injection pipe 17 is connected to the middle of the side of the separation tank 2 away from the graphene treatment tank 3, and is used to inject external oily wastewater from the middle position of the separation tank 2, so that the wastewater can spread evenly to both sides and flow smoothly through each treatment tank after entering. The delivery pipe 18 is connected to the lower end of the oily waste treatment tank 7 and the outlet end is connected to the third treatment tank 6, and is used to deliver the lower layer water in the oily waste treatment tank 7 after being treated by the oil filtration component 12 to the third treatment tank 6, so as to avoid the oily waste overflowing due to the excessive liquid level in the oily waste treatment tank 7. The pump 19 is installed on the delivery pipe 18 and is used to provide suction power for the liquid flow in the delivery pipe 18, so as to ensure that the water after the lower layer of the oily waste treatment tank 7 can overcome the pipeline resistance and be smoothly delivered to the third treatment tank 6.

[0038] In the preferred embodiment of this technical solution, please refer to Figure 3 and Figure 4 As shown, both scraper blades 1009 are coated with an oleophobic coating on their exteriors, and the two scraper blades 1009 are located above the first treatment tank 4 and the second treatment tank 5, respectively.

[0039] Furthermore, two scraper blades 1009 are provided and are respectively located above the first treatment pool 4 and the second treatment pool 5, for synchronously performing scraping operations corresponding to the first treatment pool 4 and the second treatment pool 5, thereby improving the overall scraping efficiency. An oleophobic coating is provided on the outside of the two scraper blades 1009 to reduce the adhesion of oil stains to the surface of the scraper blades 1009, so that the oil stains remaining on the surface of the scraper blades 1009 can be quickly slid off during lifting and vibration, keeping the surface of the scraper blades 1009 clean.

[0040] Working principle: External oily wastewater is injected into the separation tank 2 through the injection pipe 17. The wastewater first enters the first treatment tank 4, and then overflows into the second treatment tank 5 and the third treatment tank 6 in sequence. Under the action of gravity, the floating oil in the wastewater floats to the surface of the water in the first treatment tank 4 and the second treatment tank 5, forming an oil layer, while the heavy particles sink to the conical groove at the bottom of the separation tank 2, realizing the initial natural separation of oil, water and mud. The floating oil on the surface of the first treatment tank 4 and the second treatment tank 5 flows into the oil treatment tank 7 through the oil overflow pipe 9. During this process, the oil skimming component 10 works continuously. Forward oil scraping: Motor 1005 drives the one-way screw 1004 to rotate, causing the moving frame 1003 to slide forward along the sliding groove 1002 of the support frame 1001. At this time, the oil scraper 1009 below the lifting plate 1007 is slightly submerged in water, pushing the oil on the water surface from far to near towards the oil overflow pipe 9, greatly improving the oil discharge efficiency. During the forward stroke, although the spur gear 1015 passes through the rack 1016, the one-way bearing 1014 rotates freely, the transmission rod 1011 does not rotate, and the height of the oil scraper 1009 remains unchanged. Return lift: Motor 1005 reverses, moving frame 1003 resets, at this time spur gear 1015 meshes with rack 1016 and one-way bearing 1014 is locked, power is transmitted to transmission rod 1011 via transmission rod 2 1013, driving elliptical plate 1012 to rotate from short diameter end to long diameter end, at this time torsion spring 2 1024 stores energy, elliptical plate 1012 lifts moving plate 1010, and pulls lifting plate 1007 up through guide rod 1006, so that oil scraper 1009 is completely removed from the liquid surface, preventing oil from being dragged back during return; During the return stroke of the mobile frame 1003 and the rise of the scraper 1009, the rack 1307 fixed to the lower end of the mobile frame 1003 meshes with the spur gear 1306. The rotation of the spur gear 1306 drives the spur gear 1305 to rotate at an increased speed, which drives the impact cam 1304 to rotate rapidly. With the elastic cooperation of multiple springs 1302, the support plate 1301 drives the guide rod 1008 and the scraper 1009 to generate slight vibrations, which quickly shakes off the residual oil and sewage adhering to the surface of the scraper 1009, preventing the pollutants from being carried back into the far end of the treatment tank and keeping the scraper 1009 continuously clean. When the moving frame 1003 is about to return to the starting point, the actuating ball 1022 on the connecting plate 1021 contacts the inclined surface of the wedge block 1020 on the support frame 1001, forcing the pawl 1019 to rotate and lift, releasing the engagement of the ratchet 1017. At this time, the second torsion spring 1024 releases energy, driving the first transmission rod 1011 to reverse, the elliptical plate 1012 returns to the short diameter end, and the oil scraper 1009 descends again to immerse in the sewage, entering the next cycle. The sediment deposited in the conical groove at the bottom of the separation tank 2 is collected into two collection cylinders 1102 through the discharge outlet. The motor 1107 drives two screw rods 1103 to rotate slowly through the sprocket 1108 and chain 1109, pushing the sediment along the collection cylinder 1102 axially to the inlet of the extraction pump 1104. Then, the extraction pump 1104 transports the sediment to the graphene treatment tank 3 through the sewage pipe 1105 for deep purification treatment. The oily liquid discharged into the oil treatment tank 7 by the oil overflow pipe 9 is treated by the oil filter assembly 12 at the top. The separated oil is collected in the oil collection tank 8, while the treated lower water is transported to the third treatment tank 6 through the delivery pipe 18 and the pump 19 installed thereon, to continue to participate in the subsequent purification process.

[0041] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0042] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A multi-cylinder combined graphene separation and purification device for oily wastewater, comprising a base (1), a separation tank (2), and a graphene treatment tank (3), wherein the separation tank (2) and the graphene treatment tank (3) are both fixedly connected to the upper end of the base (1), characterized in that, The separation tank (2) is provided with a first treatment tank (4), a second treatment tank (5) and a third treatment tank (6). The upper end of the base (1) is fixedly connected to an oil sludge treatment tank (7) and an oil sludge collection tank (8). The upper side walls of the first treatment tank (4) and the second treatment tank (5) are connected to oil sludge overflow pipes (9). Both oil sludge overflow pipes (9) are connected to the oil sludge treatment tank (7). The upper end of the separation tank (2) is equipped with an oil scraping component (10) that scrapes oil sludge towards the two oil sludge overflow pipes (9). The lower end of the separation tank (2) is provided with a sewage discharge component (11) that facilitates the discharge of sediment from the bottom of the first treatment tank (4), the second treatment tank (5) and the third treatment tank (6). The upper end of the oil sludge treatment tank (7) is equipped with an oil filter component (12).

2. The multi-cylinder combined graphene separation and purification device for oily wastewater according to claim 1, characterized in that, The oil scraping assembly (10) includes two support frames (1001) fixedly connected to the upper end of the separation tank (2). The two support frames (1001) are symmetrically arranged, and each of the two support frames (1001) has a sliding groove (1002). A movable frame (1003) is slidably connected in both sliding grooves (1002). A one-way screw (1004) is rotatably connected to the inner wall of one of the sliding grooves (1002). The movable frame (1003) is threaded onto the outside of the one-way screw (1004). The side wall of the support frame (1001) with the one-way screw (1004) is fixedly connected to... Motor 1 (1005) has its output end rotating through the support frame (1001) and fixedly connected to one end of the one-way screw (1004). Multiple guide rods 1 (1006) slide through the moving frame (1003). The lower ends of the multiple guide rods 1 (1006) are fixedly connected to the lifting plate (1007). Two sets of guide rods 2 (1008) slide through the lifting plate (1007). The lower ends of the two sets of guide rods 2 (1008) are fixedly connected to the oil scraper (1009). Vibration components (13) are installed on the upper ends of the two sets of guide rods 2 (1008).

3. The multi-cylinder combined graphene separation and purification device for oily wastewater according to claim 2, characterized in that, A movable plate (1010) is fixedly connected to the upper end of multiple guide rods (1006). A transmission rod (1011) is rotatably connected to the inner wall of the movable frame (1003). Multiple elliptical plates (1012) are fixedly sleeved on the outside of the transmission rod (1011). The multiple elliptical plates (1012) are all attached to the lower end face of the movable plate (1010). A transmission rod (1013) is rotatably connected to one side of the movable frame (1003). The output end of the transmission rod (1013) rotatably passes through the movable frame (1003) and is fixedly connected to one end of the transmission rod (1011). A one-way bearing (1014) is fixedly sleeved on the outside of the transmission rod (1013). 014) A spur gear (1015) is fixedly mounted on the outside. A rack (1016) is fixedly connected to the upper end of one of the support frames (1001). The rack (1016) and the spur gear (1015) mesh with each other. A ratchet (1017) is rotatably connected to the other side of the moving frame (1003). The output end of the ratchet (1017) rotatably passes through the moving frame (1003) and is fixedly connected to the other end of the transmission rod (1011). A transmission rod (1018) is rotatably connected to the other side of the moving frame (1003). A pawl (1019) is fixedly mounted on the outside of the transmission rod (1018). The pawl (1019) and the ratchet (1017) engage with each other.

4. The multi-cylinder combined graphene separation and purification device for oily wastewater according to claim 3, characterized in that, Another support frame (1001) is fixedly connected to a wedge block (1020) at its upper end. A connecting plate (1021) is fixedly connected to the side wall of the pawl (1019). A toggle ball (1022) is fixedly connected to the side wall of the connecting plate (1021). The toggle ball (1022) faces the inclined surface of the wedge block (1020). A torsion spring (1023) is sleeved on the outside of the transmission rod (1018). The two ends of the torsion spring (1023) are fixedly connected to the side wall of the transmission rod (1018) and the side wall of the moving frame (1003), respectively. Two torsion springs (1024) are symmetrically arranged on the outside of the transmission rod (1011). The two ends of the two torsion springs (1024) are fixedly connected to the side wall of the transmission rod (1011) and the side wall of the moving frame (1003), respectively.

5. The multi-cylinder combined graphene separation and purification device for oily wastewater according to claim 2, characterized in that, The vibration assembly (13) includes a support plate (1301) fixedly connected to the upper end of a set of guide rods (1008). Multiple springs (1302) are fixedly connected to the upper end of the lifting plate (1007) and the lower end of the support plate (1301). A vertical plate (1303) is fixedly connected to the upper end of the lifting plate (1007). An impact cam (1304) is rotatably connected to one side wall of the vertical plate (1303), and a spur gear (1305) and a spur gear are rotatably connected to the other side of the vertical plate (1303). The pitch circle diameter of the third spur gear (1306) is larger than that of the second spur gear (1305). The second spur gear (1305) and the third spur gear (1306) mesh with each other. The output end of the second spur gear (1305) rotates through the vertical plate (1303) and is fixedly connected to one end of the impact cam (1304). The lower end of the moving frame (1003) is fixedly connected to the second rack (1307), and the second rack (1307) and the third spur gear (1306) mesh with each other.

6. The multi-cylinder combined graphene separation and purification device for oily wastewater according to claim 1, characterized in that, The sewage discharge assembly (11) includes a partition plate (1101) fixedly connected to the bottom inner wall of the separation tank (2). The bottom inner wall of the separation tank (2) is provided with two conical grooves. The lower end of the separation tank (2) is fixedly connected to two collection cylinders (1102). The lower end of each of the two grooves is provided with a discharge port. The two discharge ports are respectively connected to the two collection cylinders (1102). The inner walls of the two collection cylinders (1102) are rotatably connected with a screw rod (1103). One end of each of the two collection cylinders (1102) is connected to a first extraction pump (1104). The output ends of the two first extraction pumps (1104) are connected to a sewage pipe (1105). The discharge end of the sewage pipe (1105) is connected to the graphene treatment tank (3).

7. The multi-cylinder combined graphene separation and purification device for oily wastewater according to claim 6, characterized in that, A mounting frame (1106) is fixedly connected to the lower side wall of the separation tank (2). A motor (1107) is fixedly installed on the mounting frame (1106). A sprocket (1108) is rotatably connected to the other end of each of the two collection cylinders (1102). A chain (1109) is sleeved on the outside of the two sprockets (1108). The output ends of the two sprockets (1108) rotatably pass through the two collection cylinders (1102) and are fixedly connected to one end of the two spiral rods (1103). The output end of the motor (1107) rotatably passes through the mounting frame (1106) and is fixedly connected to one end of one of the sprockets (1108).

8. The multi-cylinder combined graphene separation and purification device for oily wastewater according to claim 3, characterized in that, The transmission rod 2 (1013) is externally slidably fitted with an annular friction plate (14), the annular friction plate (14) is attached to the side wall of the spur gear 1 (1015), and multiple springs 2 (15) and multiple telescopic rods (16) are fixedly connected between the side wall of the moving frame (1003) and the side wall of the annular friction plate (14), and the multiple telescopic rods (16) are respectively fitted inside the multiple springs 2 (15).

9. The multi-cylinder combined graphene separation and purification device for oily wastewater according to claim 1, characterized in that, The separation tank (2) is connected to the middle of the side away from the graphene treatment tank (3) by an injection pipe (17), the lower end of the oil treatment tank (7) is connected to a conveying pipe (18), the outlet end of the conveying pipe (18) is connected to the third treatment tank (6), and a pump (19) is installed on the conveying pipe (18).

10. A multi-cylinder combined graphene separation and purification device for oily wastewater according to claim 2, characterized in that, Both of the oil scrapers (1009) are provided with an oleophobic coating on the outside, and the two oil scrapers (1009) are located above the first treatment tank (4) and the second treatment tank (5), respectively.

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