Multifunctional water treatment device for oilfield produced liquid

Abstract

The invention discloses a multifunctional water treatment device for oilfield produced liquid, which relates to the technical field of oily wastewater treatment, and comprises a machine body and a wastewater pipe mounted on the outer wall of one side of the machine body, and further comprises a batch treatment mechanism, the device comprises a rotating disc rotationally connected into a machine body, a plurality of separation barrels installed at the top of the rotating disc, a stirring and air guiding assembly installed in the machine body and a driving assembly used for driving the rotating disc to rotate in a segmented mode. The sectional separation mechanism comprises a precipitation separation assembly arranged on the separation barrel, a transfer assembly arranged on one side of the precipitation separation assembly and an oil separation assembly arranged below the rotating disc; the oil-containing wastewater is quantitatively treated in batches, so that oil, water and impurities in the oil-containing wastewater can be stably layered while continuous treatment of the oil-containing wastewater is guaranteed, the effect of gradually discharging the oil, the water and the impurities is achieved, the problem that the oil, the water and the impurities are mutually mixed during separation is avoided, and the separation treatment precision of the oil-containing wastewater is improved.

Description

Technical Field

[0001] The invention relates to the technical field of oily wastewater treatment, and in particular to a multifunctional water treatment device for oilfield produced fluid. Background Art

[0002] Oilfield produced fluid includes oil, water and particulate impurities. After treatment, oilfield produced fluid will discharge oily wastewater, which affects the environment and requires further treatment.

[0003] At present, flotation is commonly used to achieve oil-water separation when treating oily wastewater. However, during continuous operation, the oil-water stratification is unstable, resulting in a high water content in the oil and a high oil content in the water during the discharge process. Therefore, the oil-water separation accuracy of oily wastewater is relatively low. Summary of the Invention

[0004] The object of the present invention is to provide a multifunctional water treatment device for oilfield produced fluid to solve the above-mentioned deficiencies in the prior art.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a multifunctional water treatment device for oilfield produced fluid, comprising a body and a wastewater pipe installed on an outer wall of one side of the body, and further comprising: The batch processing mechanism includes a turntable rotatably connected to the interior of the machine body, a plurality of separation barrels mounted on top of the turntable, a stirring and air guiding assembly mounted inside the machine body, and a driving assembly for driving the turntable to rotate in sections; The segmented separation mechanism includes a sedimentation separation component arranged on the separation barrel, a transfer component arranged on one side of the sedimentation separation component, and an oil separation component arranged below the turntable. The sedimentation separation component includes a first pressure head and a control component for driving the first pressure head to move down along the inside of the separation barrel to the oil-water dividing line. The transfer component is used to discharge the remaining oil and water in the separation barrel into the oil separation component. The oil separation component includes a drainage barrel installed on the inner wall of the bottom of the body and multiple ultrafiltration membranes installed inside the drainage barrel.

[0006] Furthermore, a fixed plate is installed inside the body, and three openings are opened inside the fixed plate. The waste water pipe passes through the fixed plate and is located above one of the separation barrels in a stationary state.

[0007] Furthermore, the stirring air guide assembly includes an air guide pipe rotatably connected to the top of the machine body, a sleeve shaft slidably sleeved on the outside of the air guide pipe, a plurality of stirring pipes fixed to the outside of the sleeve shaft, and a linkage component for driving the air guide pipe to rotate and the sleeve shaft to rise and fall; The bottom of the air guide tube is connected to the interior of the sleeve shaft, and the top of the air guide tube is rotatably connected to a rotary sealing joint; The stirring tube is connected to the sleeve shaft, and a plurality of air outlet holes are opened on the outside of the stirring tube. The stirring tube is located above one of the openings.

[0008] Furthermore, the linkage component includes a first motor mounted on the top of the body, a transmission shaft rotatably connected to the inner wall of the top of the body, and a reciprocating screw fixedly sleeved on the outside of the transmission shaft; The output end of the first motor is fixedly connected to a first gear, and the outside of the air duct is installed with a second gear, the first gear is meshed with the second gear, and the second gear is a one-way gear; A third gear is installed on the outside of the transmission shaft, the third gear is meshed with the first gear, and the third gear is a one-way gear; The external thread of the reciprocating screw is connected with a lifting block, and the lifting block is rotatably sleeved on the outside of the sleeve shaft.

[0009] Furthermore, the driving assembly includes a second motor mounted on the top of the fixed plate and a main shaft fixed to the output end of the second motor, and the bottom end of the main shaft is fixed to the center of the top of the turntable.

[0010] Furthermore, the control component includes a first electric push rod installed on the top inner wall of the body and a capacitive liquid level sensor installed on the inner wall of one side of the separation barrel, and the extended end of the first electric push rod is fixedly connected to the top of the first pressure head; A funnel-shaped sedimentation tank is provided on the inner wall of the bottom of the separation barrel, a material guide pipe is installed at the bottom of the separation barrel, and a first solenoid valve is installed on the material guide pipe; A mixing pipe is installed on the outer wall of the other side of the machine body, and the mixing pipe is located below one of the material guiding pipes in a static state.

[0011] Furthermore, the transfer assembly includes a second electric push rod mounted on the inner wall of the top of the body and a second pressure head fixed to the extended end of the second electric push rod; The outer walls of the second pressure head and the first pressure head are adapted to the inner wall of the separation barrel, and the bottom of the second pressure head is consistent with the interior of the sedimentation tank; The first pressure head and the second pressure head are respectively located above the other two through openings.

[0012] Furthermore, a partition is installed inside the separation barrel, a manifold is installed inside the partition, the bottoms of the plurality of ultrafiltration membranes are connected to the manifold, and a first one-way valve is installed on the manifold; A hydraulic cylinder is installed on the inner wall of the bottom of the discharging barrel, and a piston plate is installed on the extended end of the hydraulic cylinder; A water guide pipe is installed on the outer wall of one side of the separation barrel, the upper edge of the water guide pipe is at the same level as the lower edge of the partition, a second one-way valve is installed on the water guide pipe, and the water guide pipe is connected to the mixed discharge pipe; An oil drain pipe is installed on the outer wall of the other side of the separation barrel, the lower edge of the oil drain pipe is at the same level as the upper edge of the partition, and a second solenoid valve is installed on the oil drain pipe.

[0013] Furthermore, a detachable filter screen is installed inside the separation barrel, and the filter screen is located above the ultrafiltration membrane.

[0014] Compared with the prior art, the multifunctional water treatment device for oilfield produced fluid provided by the present invention has the following beneficial effects: 1. By treating oily wastewater in batches and quantitatively, the continuous treatment of oily wastewater is ensured while the oil, water and impurities in the oily wastewater can be stably separated, thereby achieving the effect of gradually discharging oil, water and impurities, avoiding the problem of oil, water and impurities mixing during separation, and improving the accuracy of oily wastewater separation treatment; 2. Before using ultrafiltration membrane to treat oily wastewater, the precipitated impurities and most of the water are discharged first, and only the oil and a small amount of water at the bottom of the oil are filtered. This avoids the problem of direct treatment of oily wastewater through ultrafiltration membrane, which may easily cause clogging of the ultrafiltration membrane and lead to short replacement or cleaning cycle of the ultrafiltration membrane. It also avoids the problem of slow separation speed caused by direct treatment of oily wastewater through ultrafiltration membrane. 3. By continuously separating the oily wastewater from the sedimentation impurities, water, water, oil and microbubbles, the problem of excessive water content in the oil when using the oil-water boundary line to separate oil and water is effectively avoided. At the same time, the problem of a large number of microbubbles in the oil causing high water content in the oil after separation is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction to the drawings required for use in the embodiments will be given below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the internal structure of the body of the present invention; Figure 3 This is a schematic diagram of the internal structure of the separation barrel of the present invention; Figure 4 This is a schematic structural diagram of the stirring and air guiding assembly, the sedimentation and separation assembly, and the transfer assembly of the present invention; Figure 5 It is a schematic top view of the stirring tube, the first pressure head and the second pressure head structure of the present invention; Figure 6This is a schematic structural diagram of the oil separation component of the present invention; Figure 7 Schematic diagram of the ultrafiltration membrane and manifold structure of the present invention; Figure 8 Schematic diagram of the drive assembly structure of the present invention.

[0017] Description of reference numerals: 1. Machine body; 2. Wastewater pipe; 3. Rotary disk; 4. Separation barrel; 5. First pressure head; 6. Separation barrel; 7. Ultrafiltration membrane; 8. Fixed plate; 9. Port; 10. Air guide tube; 11. Sleeve shaft; 12. Stirring tube; 13. Rotary sealing joint; 14. First motor; 15. Transmission shaft; 16. Reciprocating screw; 17. First gear; 18. Second gear; 19. Third gear; 20. Lifting block; 21. Second motor; 22. Spindle; 23. First electric push rod; 24. Capacitive liquid level sensor; 25. Sedimentation tank; 26. Material guide pipe; 27. First solenoid valve; 28. Second electric push rod; 29. ​​Second pressure head; 30. Partition; 31. Manifold; 32. First one-way valve; 33. Hydraulic cylinder; 34. Piston plate; 35. Water guide pipe; 36. Second one-way valve; 37. Mixing pipe; 38. Oil drain pipe; 39. Second solenoid valve; 40. Filter. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Example: See Figure 1 - Figure 8 A multifunctional water treatment device for oilfield produced fluid includes a body 1 and a wastewater pipe 2 mounted on an outer wall of one side of the body 1. A fixed plate 8 is mounted inside the body 1, and three openings 9 are formed inside the fixed plate 8. The wastewater pipe 2 penetrates the fixed plate 8 and is located above one of the stationary separation barrels 4. A metering valve can be installed on the wastewater pipe 2 to control the amount of wastewater injected into the separation barrel 4 each time. Also includes: The batch processing mechanism includes a turntable 3 rotatably connected to the inside of the machine body 1, a plurality of separation barrels 4 installed on the top of the turntable 3, a stirring air guide component installed inside the machine body 1 and a driving component for driving the turntable 3 to rotate in sections. In this embodiment, the number of separation barrels 4 is four. By treating the oily wastewater in batches, the waiting time for wastewater injection is reduced compared with treating it in the same separation barrel, and at the same time, the problem of high fluidity of wastewater in the separation barrel and difficulty in stable stratification caused by wastewater injection is avoided. The stirring air guide component includes an air guide pipe 10 rotatably connected to the top of the machine body 1, a sleeve shaft 11 slidingly sleeved on the outside of the air guide pipe 10, a plurality of stirring pipes 12 fixed to the outside of the sleeve shaft 11 and a linkage component for driving the air guide pipe 10 to rotate and the sleeve shaft 11 to rise and fall; the bottom of the air guide pipe 10 is connected to the inside of the sleeve shaft 11, and the top of the air guide pipe 10 is rotatably connected to a rotary sealing joint 13. The gas equipment is connected to the rotary sealing joint 13. When the air guide tube 10 rotates, the rotary sealing joint 13 does not rotate accordingly; the stirring tube 12 is connected to the sleeve shaft 11. A plurality of air outlet holes are provided on the outside of the stirring tube 12. The stirring tube 12 is located above one of the through openings 9. The linkage components include a first motor 14 installed on the top of the body 1, a transmission shaft 15 rotatably connected to the inner wall of the top of the body 1, and a reciprocating screw 16 fixedly sleeved on the outside of the transmission shaft 15; a first gear 17 is fixedly connected to the output end of the first motor 14, and a second gear 18 is installed on the outside of the air guide tube 10. The first gear 17 is meshed with the second gear 18, and the second gear 18 is a one-way gear; a third gear 19 is installed on the outside of the transmission shaft 15, and the third gear 19 is meshed with the first gear 17. The third gear 19 is a one-way gear; the external thread of the reciprocating screw 16 is connected to a lifting block 20, and the lifting block 20 is rotatably sleeved on the outside of the sleeve shaft 11; The oily wastewater is injected into the separation barrel 4 at the bottom through the wastewater pipe 2. This is the waste injection station. The turntable 3 is driven to rotate by the driving component, and the separation barrel 4 filled with oily wastewater is driven to rotate to the flotation station, that is, below the stirring tube 12. The first motor 14 is controlled to drive the first gear 17 to rotate clockwise. The first gear 17 is engaged with the third gear 19 to drive the transmission shaft 15 to rotate. At this time, the second gear 18 also rotates, but the air guide tube 10 does not rotate. When the transmission shaft 15 rotates, the reciprocating screw 16 is driven to rotate synchronously. In this process, the lifting is driven. The descending block 20 moves down from the top end of the reciprocating screw 16 to its bottom end, thereby driving the sleeve shaft 11 to slide downward synchronously along the outside of the air guide tube 10, and then driving the stirring tube 12 to move down to the inside of the separation barrel 4, and injecting gas into the air guide tube 10 through the gas injection equipment. The gas enters the inside of each stirring tube 12 through the sleeve shaft 11 and is discharged into the wastewater from the air outlet. At the same time, the first motor 14 is controlled to drive the first gear 17 to rotate counterclockwise, and the meshing effect between the first gear 17 and the second gear 18 drives the air guide tube 10 to rotate. At this time, the third gear 19 also rotates accordingly, but the transmission shaft 15 does not rotate accordingly. When the air guide pipe 10 rotates, the sleeve shaft 11 is driven to rotate synchronously, and the stirring tube 12 rotates accordingly. In the process of the rotation of the stirring tube 12, gas is input into the wastewater to generate a large number of micro bubbles. The micro bubbles are used as carriers to provide buoyancy, which accelerates the floating of oil droplets and the separation of water. After the flotation treatment, the first motor 14 is controlled to drive the reciprocating screw 16 to rotate, and the lifting block 20 is driven to move from the bottom end of the reciprocating screw 16 to the top end thereof, thereby driving the sleeve shaft 11 and the stirring tube 12 to move upward synchronously, so that the stirring tube 12 is separated from the interior of the separation barrel 4, and then the separation barrel is driven by the driving component. 4 is rotated to the sedimentation and separation station, that is, below the first pressure head 5, and the separation barrel 4 is first allowed to stand still, and the particulate impurities are gradually precipitated and gathered inside the sedimentation tank 25, forming a state of impurities, water and oil stratification. Then, the first pressure head 5 is driven to move downward along the inner wall of the separation barrel 4 to discharge the impurities gathered inside the sedimentation tank 25 first, leaving only oil and a small amount of water. Then, the separation barrel 4 is driven by the driving component to rotate to the transfer station, that is, below the second pressure head 29, and the second pressure head 29 is driven to move downward along the inner wall of the separation barrel 4 to completely discharge the oil and water inside the separation barrel 4 into the separation barrel 6.

[0020] The driving assembly includes a second motor 21 mounted on the top of the fixed plate 8 and a main shaft 22 fixed to the output end of the second motor 21, and the bottom end of the main shaft 22 is fixed to the center of the top of the turntable 3; By controlling the second motor 21 to drive the main shaft 22 to rotate clockwise, the turntable 3 rotates synchronously, and the turntable 3 is driven to pause every 90° rotation, thereby driving the separation barrel 4 on the top of the turntable 3 to pause in the waste injection station, flotation station, sedimentation separation station and transfer station in sequence.

[0021] The segmented separation mechanism includes a sedimentation separation component arranged on the separation barrel 4, a transfer component arranged on one side of the sedimentation separation component, and an oil separation component arranged below the turntable 3. The sedimentation separation component includes a first pressure head 5 and a control component for driving the first pressure head 5 to move down along the inside of the separation barrel 4 to the oil-water dividing line. The transfer component is used to discharge the remaining oil and water in the separation barrel 4 into the oil separation component. The oil separation component includes a separation barrel 6 installed on the bottom inner wall of the body 1 and multiple ultrafiltration membranes 7 installed inside the separation barrel 6. The control component includes a first electric push rod 23 installed on the top inner wall of the body 1 and A capacitive liquid level sensor 24 is installed on the inner wall of one side of the separation barrel 4. The capacitive liquid level sensor 24 is used to detect the interface between oil and water. The principle of the capacitive liquid level sensor 24 is to utilize the huge difference in dielectric constant between oil (usually low dielectric constant, 2-5) and water (high dielectric constant, about 80). When the medium (oil or water) changes, the capacitance value changes significantly; the extended end of the first electric push rod 23 is fixed to the top of the first pressure head 5; a funnel-shaped sedimentation tank 25 is provided on the inner wall of the bottom of the separation barrel 4, and a guide pipe 26 is installed at the bottom of the separation barrel 4, and the guide pipe 26 is installed with the first electric push rod 23. Magnetic valve 27, a pressure valve is also installed on the guide pipe 26; a mixing pipe 37 is installed on the outer wall of the other side of the body 1, and the mixing pipe 37 is located below one of the guide pipes 26 in a static state. The transfer assembly includes a second electric push rod 28 installed on the inner wall of the top of the body 1 and a second pressure head 29 fixed to the extended end of the second electric push rod 28; the outer walls of the second pressure head 29 and the first pressure head 5 are adapted to the inner wall of the separation barrel 4, and the bottom of the second pressure head 29 coincides with the interior of the sedimentation tank 25; the first pressure head 5 and the second pressure head 29 are respectively located above the other two openings 9, and the first pressure head 5 and the second pressure head An air pipe is installed inside each of the first and second pressure heads 5 and 29, and a one-way valve is installed on the air pipe. The setting of the one-way valve can prevent the medium at the bottom of the first pressure head 5 or the second pressure head 29 from reaching the top thereof through the air pipe, and the medium at the top of the first and second pressure heads 5 or 29 can reach the bottom thereof through the air pipe. Then, when the first and second pressure heads 5 and 29 move downward along the inner wall of the separation barrel 4, the medium inside the separation barrel 4 can be squeezed out. When the first and second pressure heads 5 and 29 move upward, external air can reach the bottom of the first and second pressure heads 5 or 29 through the air pipe, so that the first and second pressure heads 5 and 29 can move upward smoothly. When the separation barrel 4 rotates to the sedimentation separation station, the particulate impurities gradually settle and gather inside the sedimentation tank 25, forming a state of impurities, water and oil stratification. The first solenoid valve 27 is controlled to open. Due to the existence of the pressure valve, the medium inside the separation barrel 4 does not make the pressure valve reach the open state. Then the first electric push rod 23 is controlled to drive the first pressure head 5 to move downward along the inner wall of the separation barrel 4, applying pressure to the medium inside the separation barrel 4. When the pressure reaches the set value of the pressure valve, the pressure valve is opened, and the impurities inside the sedimentation tank 25 at the bottom of the separation barrel 4 are squeezed out first, and then the water is squeezed out. The guide pipe 26 and the mixing pipe 37 are discharged. When the capacitive liquid level sensor 24 detects the oil-water interface, the signal is transmitted to the controller. The controller controls the first electric push rod 23 to stop extending downward and closes the first solenoid valve 27. Then the first electric push rod 23 is controlled to drive the first pressure head 5 to move upward and reset. When the separation barrel 4 rotates to the transfer position, the first solenoid valve 27 is controlled to open, and the second electric push rod 28 is controlled to drive the second pressure head 29 to move downward. When the pressure reaches the set value of the pressure valve, the pressure valve opens to discharge the remaining oil and a small amount of water inside the separation barrel 4 into the separation barrel 6.

[0022] A partition 30 is installed inside the separation barrel 6, and a manifold 31 is installed inside the partition 30. The bottoms of multiple ultrafiltration membranes 7 are connected to the manifold 31. A first one-way valve 32 is installed on the manifold 31. The setting of the first one-way valve 32 allows the clean water inside the ultrafiltration membrane 7 to be discharged to between the partition 30 and the piston plate 34 through the manifold 31, and the water between the partition 30 and the piston plate 34 cannot return to the interior of the ultrafiltration membrane 7 through the manifold 31; a hydraulic cylinder 33 is installed on the inner wall of the bottom of the separation barrel 6, and a piston plate 34 is installed on the extended end of the hydraulic cylinder 33; a water guide pipe 35 is installed on the outer wall of one side of the separation barrel 6 The upper edge of the water pipe 35 is at the same level as the lower edge of the partition 30. A second one-way valve 36 is installed on the water pipe 35. The water pipe 35 is connected to the mixing pipe 37. The second one-way valve 36 is set so that the clean water between the partition 30 and the piston plate 34 can be discharged into the mixing pipe 37 through the water pipe 35, and the medium inside the mixing pipe 37 cannot enter between the partition 30 and the piston plate 34 through the water pipe 35; an oil drain pipe 38 is installed on the outer wall of the other side of the separation barrel 6. The lower edge of the oil drain pipe 38 is at the same level as the upper edge of the partition 30. A second solenoid valve 39 is installed on the oil drain pipe 38; After the remaining oil and a small amount of water in the separation barrel 4 are discharged into the separation barrel 6, the hydraulic cylinder 33 is controlled to drive the piston plate 34 to move downward along the inner wall of the separation barrel 6, and a negative pressure is generated between the piston plate 34 and the partition 30, and then a negative pressure is generated inside each ultrafiltration membrane 7 through the manifold 31, wherein water molecules and microbubbles can enter the manifold 31 through the ultrafiltration membrane 7 and be sucked between the piston plate 34 and the partition 30, while the oil cannot pass through the ultrafiltration membrane 7 and will be isolated outside the ultrafiltration membrane 7, thereby achieving a complete separation of oil and water, effectively avoiding the problem of excessive water content in the oil when using the oil-water boundary line to separate oil and water, and solving the problem of high water content in the oil after separation caused by a large number of microbubbles in the oil. After removing the water, the second solenoid valve 39 is controlled to open, and the oil on the top of the partition 30 is discharged through the oil drain pipe 38, and then the hydraulic cylinder 33 is controlled to drive the piston plate 34 to move upward, and the clean water on the top of the piston plate 34 is discharged into the mixed discharge pipe 37 through the water guide pipe 35.

[0023] A detachable filter screen 40 is installed inside the separation barrel 6, and the filter screen 40 is located above the ultrafiltration membrane 7; When the remaining oil and a small amount of water in the separation barrel 4 are discharged into the separation barrel 6, the floating impurities are first filtered through the filter net 40. After the oil and water are separated, there is no need to filter the impurities in the oil, which improves the overall treatment efficiency of the oily wastewater and reduces the clogging of the ultrafiltration membrane 7.

[0024] It should be noted that the device structure and drawings of the present invention mainly describe the principles of the present invention. In terms of the technology of this design principle, the settings of the device's power mechanism, power supply system, and control system are not fully described. However, those skilled in the art can clearly understand the details of its power mechanism, power supply system, and control system on the premise that they understand the principles of the above invention. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be implemented by simple programming by those skilled in the art. The above only describes certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present invention.

Claims

1. A multifunctional water treatment device for oilfield produced fluid, comprising a body (1) and a wastewater pipe (2) installed on an outer wall of one side of the body (1), characterized in that: Also includes: A batch processing mechanism comprises a turntable (3) rotatably connected to the interior of a machine body (1), a plurality of separation barrels (4) mounted on top of the turntable (3), a stirring and air guiding assembly mounted inside the machine body (1), and a driving assembly for driving the turntable (3) to rotate in sections; A segmented separation mechanism comprises a sedimentation separation assembly arranged on a separation barrel (4), a transfer assembly arranged on one side of the sedimentation separation assembly, and an oil separation assembly arranged below a turntable (3); the sedimentation separation assembly comprises a first pressure head (5) and a control component for driving the first pressure head (5) to move downward along the interior of the separation barrel (4) to an oil-water dividing line; the transfer assembly is used to discharge the remaining oil and water in the separation barrel (4) into the interior of the oil separation assembly; and the oil separation assembly comprises a drainage barrel (6) mounted on the bottom inner wall of the machine body (1) and a plurality of ultrafiltration membranes (7) mounted inside the drainage barrel (6).

2. The multifunctional water treatment device for oilfield produced fluid according to claim 1, characterized in that: A fixed plate (8) is installed inside the machine body (1), and three openings (9) are opened inside the fixed plate (8). The waste water pipe (2) passes through the fixed plate (8) and is located above one of the separation barrels (4) in a stationary state.

3. The multifunctional water treatment device for oilfield produced fluid according to claim 2, characterized in that: The stirring air guide assembly comprises an air guide pipe (10) rotatably connected to the top of the machine body (1), a sleeve shaft (11) slidably sleeved on the outside of the air guide pipe (10), a plurality of stirring pipes (12) fixedly connected to the outside of the sleeve shaft (11), and a linkage component for driving the air guide pipe (10) to rotate and the sleeve shaft (11) to rise and fall; The bottom of the air guide tube (10) is connected to the interior of the sleeve shaft (11), and the top of the air guide tube (10) is rotatably connected to a rotary sealing joint (13); The stirring tube (12) is connected to the sleeve shaft (11), and a plurality of air outlet holes are provided on the outside of the stirring tube (12). The stirring tube (12) is located above one of the openings (9).

4. The multifunctional water treatment device for oilfield produced fluid according to claim 3, characterized in that: The linkage component comprises a first motor (14) mounted on the top of the machine body (1), a transmission shaft (15) rotatably connected to the inner wall of the top of the machine body (1), and a reciprocating screw (16) fixedly sleeved on the outside of the transmission shaft (15); The output end of the first motor (14) is fixedly connected to a first gear (17), the outside of the air guide tube (10) is provided with a second gear (18), the first gear (17) is meshed with the second gear (18), and the second gear (18) is a one-way gear; A third gear (19) is installed on the outside of the transmission shaft (15), and the third gear (19) is meshed with the first gear (17). The third gear (19) is a one-way gear; The external thread of the reciprocating screw (16) is connected to a lifting block (20), and the lifting block (20) is rotatably sleeved on the outside of the sleeve shaft (11).

5. The multifunctional water treatment device for oilfield produced fluid according to claim 4, characterized in that: The driving assembly comprises a second motor (21) mounted on the top of the fixed plate (8) and a main shaft (22) fixedly connected to the output end of the second motor (21), wherein the bottom end of the main shaft (22) is fixedly connected to the center of the top of the turntable (3).

6. The multifunctional water treatment device for oilfield produced fluid according to claim 5, characterized in that: The control component comprises a first electric push rod (23) mounted on the top inner wall of the body (1) and a capacitive liquid level sensor (24) mounted on the inner wall of one side of the separation barrel (4), wherein the extended end of the first electric push rod (23) is fixedly connected to the top of the first pressure head (5); A funnel-shaped sedimentation tank (25) is provided on the inner wall of the bottom of the separation barrel (4), a material guide pipe (26) is installed at the bottom of the separation barrel (4), and a first solenoid valve (27) is installed on the material guide pipe (26); A mixing pipe (37) is installed on the outer wall of the other side of the machine body (1), and the mixing pipe (37) is located below one of the material guide pipes (26) in a stationary state.

7. The multifunctional water treatment device for oilfield produced fluid according to claim 6, characterized in that: The transfer assembly comprises a second electric push rod (28) mounted on the top inner wall of the body (1) and a second pressure head (29) fixedly connected to the extended end of the second electric push rod (28); The outer walls of the second pressure head (29) and the first pressure head (5) are both adapted to the inner wall of the separation barrel (4), and the bottom of the second pressure head (29) is consistent with the interior of the sedimentation tank (25); The first pressure head (5) and the second pressure head (29) are respectively located above the other two openings (9).

8. The multifunctional water treatment device for oilfield produced fluid according to claim 7, characterized in that: A partition (30) is installed inside the separation barrel (6), a manifold (31) is installed inside the partition (30), the bottoms of the plurality of ultrafiltration membranes (7) are connected to the manifold (31), and a first one-way valve (32) is installed on the manifold (31); A hydraulic cylinder (33) is mounted on the inner wall of the bottom of the discharging barrel (6), and a piston plate (34) is mounted on the extended end of the hydraulic cylinder (33); A water guide pipe (35) is installed on the outer wall of one side of the separation barrel (6), the upper edge of the water guide pipe (35) is at the same level as the lower edge of the partition (30), a second one-way valve (36) is installed on the water guide pipe (35), and the water guide pipe (35) is connected to the mixed discharge pipe (37); An oil drain pipe (38) is installed on the outer wall of the other side of the drainage barrel (6), the lower edge of the oil drain pipe (38) is at the same level as the upper edge of the partition (30), and a second solenoid valve (39) is installed on the oil drain pipe (38).

9. The multifunctional water treatment device for oilfield produced fluid according to claim 8, characterized in that: A detachable filter screen (40) is installed inside the separation barrel (6), and the filter screen (40) is located above the ultrafiltration membrane (7).

Images