Centrifugal self-cleaning oil mist separation device

Abstract

The utility model relates to the technical field of separation device equipment, and discloses a centrifugal self-cleaning oil mist separation device which comprises an oil mist coalescence separation barrel located inside a separation barrel body and an exhaust structure located outside the separation barrel body, the exhaust structure comprises an exhaust pipe and a driving structure, and the oil mist coalescence separation barrel is rotationally connected to the bottom of the separation barrel body. An electric heater is arranged in the oil mist coalescence separation barrel, and an L-shaped oil baffle plate is arranged on the inner side of the position where the exhaust structure and the separation barrel penetrate through. The oil mist separation device has the advantages that the oil mist separation efficiency is improved, the self-cleaning function is achieved, the manual maintenance cost is reduced, and the downtime is shortened.

Description

Technical Field

[0001] This utility model relates to the field of separation device technology, specifically a centrifugal self-cleaning oil mist separation device. Background Technology

[0002] During the metallurgical steel rolling process, gearboxes, oil film bearings, and other related thin oil lubrication systems generate a large amount of oil mist during operation. If this oil mist is not effectively treated, it will not only pollute the working environment and endanger the health of operators, but may also damage machinery and equipment, affecting its normal operation and service life.

[0003] Existing oil mist separation devices have several problems during operation. Firstly, some devices have low separation efficiency, failing to effectively remove fine particles from the oil mist, resulting in emitted gases still containing a certain amount of oil mist, which cannot meet increasingly stringent environmental protection requirements. Secondly, after prolonged use, the internal filter components of many oil mist separation devices are easily clogged by impurities in the oil mist, requiring frequent manual cleaning or replacement. This not only increases maintenance costs and downtime but also reduces production efficiency. Furthermore, manual cleaning is cumbersome and difficult to thoroughly remove oil stains from the filter components, hindering the recovery of the oil mist separation device's performance.

[0004] CN 209271675 U discloses a device for oil mist recovery and disc cleaning in a disc centrifugal separator. The disc centrifugal separator includes a separation chamber, a rotor, and a drive chamber. The separation chamber includes a gas-liquid mixture inlet. An oil mist zone is formed inside the drive chamber, with an oil mist inlet on one side of the oil mist zone and an oil mist outlet on one side of the separation chamber. The oil mist outlet is connected to the gas-liquid mixture inlet of the separation chamber, and an oil supply device connects the oil mist inlet and outlet. This structure only allows oil mist to be generated through rotation and lacks a centrifugal separation mechanism, resulting in poor oil mist separation efficiency.

[0005] Therefore, a new technical solution is needed to solve the above-mentioned technical problems. Summary of the Invention

[0006] To address the aforementioned problems, this utility model discloses a centrifugal self-cleaning oil mist separation device that improves oil mist separation efficiency and has a self-cleaning function, thereby reducing manual maintenance costs and downtime.

[0007] The technical solution of this utility model is as follows: a centrifugal self-cleaning oil mist separation device, including an oil mist coalescing separation cylinder located inside the separation cylinder body and an exhaust structure located outside the separation cylinder body. The exhaust structure includes an exhaust pipe and a drive structure. The oil mist coalescing separation cylinder is rotatably connected to the bottom of the separation cylinder body. An electric heater is provided inside the oil mist coalescing separation cylinder body. An L-shaped oil baffle is provided on the inner side of the position where the exhaust structure and the separation cylinder body pass through.

[0008] Preferably, the bottom of the oil mist coalescing separator is mounted on a shaft via a separator support bracket. The shaft is connected to a bearing seat at the bottom of the separator base via a bearing and is mounted in a centrifugal drive mounting base. The oil seal below the bearing is secured to the bearing seat with screws via a cover plate. The end of the shaft is mounted at the centrifugal drive output end below the centrifugal drive mounting base.

[0009] By adopting the above technical solution, the centrifugal drive shaft rotates the oil mist coalescing separator cylinder. Under the centrifugal force generated by the high-speed rotation, the oil droplets in the oil mist coalescing separator cylinder assembly are thrown towards the inner wall of the separator cylinder, achieving preliminary separation. The separated oil flows downward along the inner wall of the separator cylinder and accumulates at the bottom of the separator cylinder.

[0010] Preferably, the upper end of the oil mist coalescing separator is provided with a balance ring assembly, which is welded to the upper side of the inner wall of the separator via a flexible sealing mounting seat, and a flexible sealing plate is provided between the flexible sealing mounting seat and the separator.

[0011] By adopting the above technical solution, the sealing degree between the oil mist coalescing separator and the separator body is improved.

[0012] Preferably, the top of the separation cylinder is provided with a separation cylinder cover, and an electric heater runs through the middle of the separation cylinder cover. The heating section of the electric heater extends into the center of the oil mist coalescing separation cylinder.

[0013] By adopting the above technical solution, the electric heater can accurately control the heating temperature according to actual working needs, keeping the temperature within a suitable range. The electric heater heats the oil mist, reducing its viscosity and making it easier to separate. The heated oil droplets are more easily thrown out and adhere to the inner wall of the separation cylinder under the action of centrifugal force, thus improving the separation effect.

[0014] Preferably, the separator cover and the top of the oil mist coalescing separator are spaced apart, the inside of the oil mist coalescing separator and the space between the separator body form an oil mist suction chamber, and the outer wall of the oil mist coalescing separator and the space between the separator body form an oil mist separation and collection chamber.

[0015] Preferably, the exhaust pipe includes a fan intake pipe and a fan exhaust pipe. One end of the fan intake pipe is connected to the middle of one side of the separator cylinder. The fan intake pipe has a downward-facing L-shaped oil baffle at the intake position inside the separator cylinder. The L-shaped oil baffle is larger than the diameter of the fan intake pipe. The other end of the fan intake pipe is connected to the fan and the variable frequency motor through a corrugated pipe. The fan and the variable frequency motor are fixed to the base of the oil mist separator with screws.

[0016] By adopting the above technical solution, the L-shaped oil baffle can prevent the fan suction pipe from directly absorbing the part near the fan suction pipe when it is suctioning, and prevent the oil droplets from being sucked out due to the excessive suction of the oil mist coalescence separation cylinder near the fan suction pipe. In this way, the gas in the oil mist separation and collection chamber can be absorbed evenly.

[0017] Preferably, the exhaust ports of the fan and the variable frequency motor are connected to one end of the fan exhaust pipe, the middle of the fan exhaust pipe is connected to an electric exhaust ball valve, the top of the fan exhaust pipe is connected to a negative pressure regulating valve, and the negative pressure regulating valve is connected to the oil mist suction chamber of the separation cylinder through a pipeline.

[0018] By adopting the above technical solution, when the pressure in the separation cylinder decreases, the gas in the exhaust pipe is introduced into the separation cylinder by opening the negative pressure regulating valve, so as to prevent the pressure in the exhaust pipe from being too low and maintain the negative pressure balance in the separation cylinder.

[0019] Preferably, the oil mist suction chamber is connected to the high-pressure inlet of the differential pressure controller, the oil mist separation and collection chamber is connected to the low-pressure inlet of the differential pressure controller, and the differential pressure controller is fixed to the outer wall of the separation cylinder by a mounting bracket.

[0020] By adopting the above technical solution, when the differential pressure controller sends a high differential pressure signal during the operation of the oil mist separation device, the oil mist coalescing separation cylinder will experience poor separation effect.

[0021] Preferably, the bottom of the oil mist separation and collection chamber is provided with an oil drain pipe, and the oil drain pipe and the fan suction pipe are located on both sides of the separation cylinder. The lower end of the oil drain pipe is connected to a liquid level controller and a two-position two-way solenoid valve. The oil outlet of the two-position two-way solenoid valve is connected to the wall of the oil mist inlet pipe. The first end of the oil mist inlet pipe passes through the side of the separation cylinder at the top of the oil mist separation and collection chamber. A negative pressure controller is also provided on the side wall of the oil mist inlet pipe.

[0022] By adopting the above technical solution, during the operation of the oil mist separation device, when the negative pressure controller installed on the oil mist inlet pipe issues a negative pressure alarm value 1, a negative pressure is generated in the oil tank, which affects the normal operation of the main system. The PLC control box gives a signal to reduce the speed of the fan and the variable frequency motor. When the negative pressure controller issues a negative pressure alarm value 2, the negative pressure in the oil tank is still not eliminated. At this time, the negative pressure adjustment valve is partially opened until the negative pressure in the oil tank is eliminated.

[0023] Preferably, the level control valve, the two-position two-way solenoid valve, the negative pressure controller, the exhaust electric ball valve, the negative pressure regulating valve, the differential pressure controller, the electric heater, the fan, and the frequency conversion motor are all connected to the PLC control box, and the PLC control box mounting plate is welded to the outer wall of the separator cylinder.

[0024] By adopting the above technical solution, the operation of each module is controlled by a PLC electrical control box.

[0025] The advantages of this utility model are as follows: 1. This utility model heats the oil mist by installing an electric heater inside the oil mist coalescing separation cylinder. Combined with centrifugal force and temperature control heating, it improves the oil mist separation efficiency and prevents low-temperature solidification, reducing the viscosity of the oil mist and making it easier to separate. This ensures long-term stable operation of the device and reduces maintenance costs.

[0026] 2. By adopting an L-shaped oil baffle, this utility model can prevent the fan suction pipe from forcefully sucking air into the oil mist coalescing and separating cylinder, which would cause oil droplets to be sucked out. This can improve the uniform absorption of gas in the oil mist separation and collection chamber by the fan suction pipe.

[0027] 3. This utility model is an oil mist separation device that improves oil mist separation efficiency and has a self-cleaning function, reducing manual maintenance costs and downtime. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the external structure of the present invention.

[0030] Figure 3 This utility model Figure 1 A structural schematic diagram of enlarged view of part A in the middle.

[0031] Figure 4 This is a schematic diagram of the circuit principle of this utility model.

[0032] The components include: 1. Fan intake pipe, 2. Fan exhaust pipe, 3. Exhaust electric ball valve, 4. Negative pressure regulating valve, 5. Separator cylinder, 6. O-ring seal, 7. Separator cylinder cover, 8. Electric heater, 9. Oil mist inlet pipe, 10. Flexible sealing plate, 11. Flexible sealing plate mounting base, 12. Balance ring assembly, 13. PLC control box, 14. Oil mist coalescing separator cylinder, 15. Negative pressure controller, 16. Oil drain pipe, 17. Liquid level controller, 18. Centrifugal drive, 19. Two-position two-way solenoid valve, 20. Fan and variable frequency motor, 21. Centrifugal drive mounting base, 22. Cover plate, 23. Oil seal, 24. Bearing, 25. Bearing seat, 26. Separator cylinder support frame, 27. Shaft, 28. L-shaped oil baffle, 29. Oil mist separation and collection chamber, 30. Oil mist suction chamber, 31. Differential pressure controller. Detailed Implementation

[0033] 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.

[0034] like Figures 1-3 As shown, a centrifugal self-cleaning oil mist separation device includes an oil mist coalescing separation cylinder 14 located inside the separation cylinder 5 and an exhaust structure located outside. The exhaust structure includes an exhaust pipe and a drive structure. The oil mist coalescing separation cylinder 14 is rotatably connected to the bottom of the separation cylinder 5. An electric heater 8 is provided inside the oil mist coalescing separation cylinder 14. An L-shaped oil baffle 28 is provided on the inner side of the position where the exhaust structure and the separation cylinder 5 pass through.

[0035] The filter screen inside the oil mist coalescing separator 14 has a progressively smaller aperture from the inside to the outside. The bottom of the oil mist coalescing separator 14 is mounted on the shaft 27 via the separator support bracket 26. The shaft 27 is connected to the shaft 27 bearing 24 seat at the bottom of the separator body 5 via the shaft 27 bearing 24 and is mounted in the centrifugal drive 18 mounting seat. The oil seal 23 is fastened to the shaft 27 bearing 24 seat by screws via the cover plate 22 below the shaft 27 bearing 24. The bottom of the separator body 55 is connected to the shaft 27 bearing seat 25 and the centrifugal drive mounting seat 21. The end of the shaft 27 is mounted on the output end of the centrifugal drive 18 below the centrifugal drive 18 mounting seat. The centrifugal drive 18 drives the shaft 27 to rotate the oil mist coalescing separator 14. Under the centrifugal force generated by the high-speed rotation of the oil mist coalescing separator 14, the oil droplets in the oil mist coalescing separator 14 assembly are thrown towards the inner wall of the separator body 5, achieving preliminary separation. The separated oil flows downward along the inner wall of the separator body 5 and accumulates at the bottom of the separator body 5.

[0036] The upper end of the oil mist coalescence separator 14 is provided with a balance ring assembly 12. The balance ring assembly 12 is welded to the upper side of the inner wall of the separator 5 through a flexible sealing plate mounting seat 11. A flexible sealing plate 10 is provided between the flexible sealing mounting seat and the separator 5 to improve the sealing degree between the oil mist coalescence separator 14 and the separator 5.

[0037] The separation cylinder 5 is coated with an oleophobic coating to reduce the risk of residue. The top of the separation cylinder 5 is equipped with a separation cylinder cover 7, which is connected to the separation cylinder 5 with an O-ring seal 6 by screws. An electric heater 8 runs through the middle of the separation cylinder cover 7. The heating section of the electric heater 8 extends into the center of the oil mist coalescing separation cylinder 14. The electric heater 8 can precisely control the heating temperature according to actual working needs, keeping the temperature within a suitable range. The electric heater 8 heats the oil mist, reducing its viscosity and making it easier to separate. The heated oil droplets are more easily thrown out and adhere to the inner wall of the separation cylinder 5 under the action of centrifugal force, improving the separation effect.

[0038] A gap is provided between the top of the separator cover 7 and the oil mist coalescing separator 14. The oil mist intake chamber 30 is located between the inside of the oil mist coalescing separator 14 and the separator body 5. The oil mist separation and collection chamber 29 is located between the outer wall of the oil mist coalescing separator 14 and the separator body 5. The exhaust pipe includes a fan intake pipe 1 and a fan exhaust pipe 2. One end of the fan intake pipe 1 is connected to the middle of one side of the separator body 5. A downward-facing L-shaped oil baffle 28 is provided at the intake position of the fan intake pipe 1 within the separator body 5. The L-shaped oil baffle 28 is larger than the fan intake position. The diameter of pipe 1, the other end of the fan suction pipe 1 is connected to the fan and variable frequency motor 20 through a corrugated pipe. The fan and variable frequency motor 20 are fixed to the base of the oil mist separation device by screws. The L-shaped oil baffle 28 can prevent the part near the fan suction pipe 1 from being absorbed directly when the fan suction pipe 1 is suctioning, and prevent the oil droplets from being sucked out because the oil mist coalescing separation cylinder 14 near the fan suction pipe 1 is too strong. In this way, the gas in the oil mist separation collection chamber 29 can be absorbed evenly.

[0039] The exhaust port of the fan and the variable frequency motor 20 is connected to one end of the fan exhaust pipe 2. The middle part of the fan exhaust pipe 2 is connected to the exhaust electric ball valve 3. The top of the fan exhaust pipe 2 is connected to the negative pressure regulating valve 4. The negative pressure regulating valve 4 is connected to the oil mist suction chamber 30 of the separator 5 through a pipe. When the pressure of the separator 5 decreases, the gas in the exhaust pipe is input into the separator 5 by opening the negative pressure regulating valve 4 to prevent the pressure in the exhaust pipe from being too low, so that the separator 5 maintains a negative pressure balance.

[0040] The oil mist suction chamber 30 is connected to the high pressure inlet of the differential pressure controller 31, and the oil mist separation and collection chamber 29 is connected to the low pressure inlet of the differential pressure controller 31. The differential pressure controller 31 is fixed on the outer wall of the separation cylinder 5 by a mounting bracket. During the operation of the oil mist separation device, when the differential pressure controller 31 sends a high differential pressure signal, the oil mist coalescence separation cylinder 14 will have a poor separation effect.

[0041] The bottom of the oil mist separation and collection chamber 29 is equipped with an oil drain pipe 16. The oil drain pipe 16 and the fan suction pipe 1 are located on both sides of the separation cylinder 5. The lower end of the oil drain pipe 16 is connected to the liquid level controller 17 and the two-position two-way solenoid valve 19. The oil outlet of the two-position two-way solenoid valve 19 is connected to the wall of the oil mist inlet pipe. The first end of the oil mist inlet pipe passes through the side of the separation cylinder 5 at the top of the oil mist separation and collection chamber 29. A negative pressure controller 15 is also provided on the side wall of the oil mist inlet pipe. The oil mist inlet pipe is connected to the top plate of the thin oil lubrication system oil tank. The flange port on the oil mist separator is connected to an open space outside the factory building via an electric ball valve 3. During operation of the oil mist separator, when the negative pressure controller 15 installed on the oil mist inlet pipe issues a negative pressure alarm value 1, a negative pressure is generated in the oil tank, affecting the normal operation of the main system. The PLC control box 13 sends a signal to reduce the speed of the fan and the variable frequency motor 20. When the negative pressure controller 15 issues a negative pressure alarm value 2, the negative pressure in the oil tank is still not eliminated. At this time, the negative pressure adjustment valve 4 is partially opened until the negative pressure in the oil tank is eliminated.

[0042] The level control valve, the two-position two-way solenoid valve 19, the negative pressure controller 15, the exhaust electric ball valve 3, the negative pressure regulating valve 4, the differential pressure controller 31, the electric heater 8, the fan and the variable frequency motor 20 are all connected to the PLC control box 13. The connection between the PLC control box 13 and the PLC control box 13 is a conventional connection method. The mounting plate of the PLC control box 13 is welded to the outer wall of the separation cylinder 5.

[0043] Working principle: Exhaust electric ball valve 3, negative pressure regulating valve 4, electric heater 8, negative pressure controller 15, liquid level controller 17, centrifugal drive 18, two-position two-way solenoid valve 19, fan and frequency converter (20, differential pressure controller 31) are connected to PLC control box 13. After the main control room connects the interlock control line and power line to PLC control box 13, it can be put into operation.

[0044] After the thin oil lubrication system has been running for a period of time, when oil mist is detected in the oil tank, the main control room sends a signal to the PLC control box 13 of this device to start the centrifugal self-cleaning oil mist separator. At the same time, the exhaust electric ball valve 3 opens, the negative pressure regulating valve 4 closes, the negative pressure controller 15 and the differential pressure controller 31 are put into monitoring, and the fan and variable frequency motor 20 start to introduce the gas containing oil mist into the oil mist suction chamber 30 through the oil mist inlet pipe 9. First, it passes through the innermost filter screen of the oil mist coalescing separation cylinder 14 with a larger pore size, which initially filters out the larger oil droplets. As the gas continues to flow to the outside, it passes through the filter screen with gradually decreasing pore size in sequence, which further filters out the tiny oil mist particles. In this process, the oil droplets in the oil mist are intercepted by the filter screen and flow downward along the surface of the filter screen, accumulating at the bottom of the separator. The clean gas after separation is drawn in from the fan suction pipe 1 through the fan and variable frequency motor 20, and then discharged through the fan exhaust pipe 2 and the exhaust electric ball valve 3.

[0045] During the operation of the oil mist separator, when the negative pressure controller 15 installed on the oil mist inlet pipe 9 issues a negative pressure alarm value 1, a negative pressure is generated in the oil tank, affecting the normal operation of the main system. The PLC control box 13 sends a signal to reduce the speed of the fan and the variable frequency motor 20. When the negative pressure controller 15 issues a negative pressure alarm value 2, the negative pressure in the oil tank is still not eliminated. At this time, the negative pressure regulating valve 4 is partially opened until the negative pressure in the oil tank is eliminated.

[0046] During the operation of the oil mist separation device, when the differential pressure controller 31 sends a high differential pressure signal, the oil mist coalescing separator 14 experiences poor separation performance. An electric heater 8 is installed inside the oil mist coalescing separator 14. This electric heater employs a high-precision temperature control system, which can precisely control the heating temperature according to actual working requirements, keeping the temperature within a suitable range. The electric heater heats the oil mist, reducing its viscosity and making it easier to separate. The heated oil droplets are more easily thrown out and adhere to the inner wall of the separator 5 under the action of centrifugal force, improving the separation effect. At this time, the centrifugal drive 18 begins to operate at progressively increasing speed. Under the centrifugal force generated by the high-speed rotation of the oil mist coalescing separator 14, the oil droplets in the oil mist coalescing separator assembly are thrown towards the inner wall of the separator 5, achieving initial separation. The separated oil flows downwards along the inner wall of the separator 5 and accumulates at the bottom of the separator.

[0047] like Figure 4 As shown, when the oil level reaches the set height, the level controller 17 sends a high oil level signal to the PLC control box 13. Upon receiving the signal, the two-position two-way solenoid valve 19 automatically opens to drain the oil. When the oil level drops below the set value, the two-position two-way solenoid valve 19 closes and the solenoid valve automatically opens to drain the oil, thus avoiding the impact of excessive oil accumulation on the normal operation of the separation device and improving the automation level and operational stability of the device.

[0048] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A centrifugal self-cleaning oil mist separator, comprising an oil mist coalescing separator located inside a separator body and an exhaust structure located outside, the exhaust structure comprising an exhaust pipe and a drive structure, characterized in that: The oil mist coalescing separator is rotatably connected to the bottom of the separator body. An electric heater is provided inside the oil mist coalescing separator. An L-shaped oil baffle is provided on the inner side of the position where the exhaust structure and the separator body pass through.

2. The centrifugal self-cleaning oil mist separator according to claim 1, characterized in that: The bottom of the oil mist coalescing separator is mounted on a shaft via a separator support bracket, and the end of the shaft is mounted on the centrifugal drive output end below the centrifugal drive mounting base.

3. The centrifugal self-cleaning oil mist separator according to claim 1, characterized in that: The upper end of the oil mist coalescing separator is provided with a balance ring assembly, which is welded to the upper side of the inner wall of the separator body through a flexible sealing mounting seat. A flexible sealing plate is provided between the flexible sealing mounting seat and the separator body.

4. The centrifugal self-cleaning oil mist separator according to claim 1, characterized in that: The top of the separation cylinder is provided with a separation cylinder cover, and an electric heater runs through the middle of the separation cylinder cover. The heating section of the electric heater extends into the center of the oil mist coalescing separation cylinder.

5. A centrifugal self-cleaning oil mist separator according to claim 4, characterized in that: The separation cylinder cover and the top of the oil mist coalescing separation cylinder are spaced apart. The inside of the oil mist coalescing separation cylinder and the separation cylinder body form an oil mist suction chamber, and the outer wall of the oil mist coalescing separation cylinder and the separation cylinder body form an oil mist separation and collection chamber.

6. A centrifugal self-cleaning oil mist separator according to claim 5, characterized in that: The exhaust pipe includes a fan intake pipe and a fan exhaust pipe. One end of the fan intake pipe is connected to the middle of one side of the separator cylinder. The fan intake pipe has a downward-facing L-shaped oil baffle at the intake position inside the separator cylinder. The L-shaped oil baffle is larger than the diameter of the fan intake pipe. The other end of the fan intake pipe is connected to the fan and the variable frequency motor through a corrugated pipe. The fan and the variable frequency motor are fixed to the base of the oil mist separator with screws.

7. A centrifugal self-cleaning oil mist separator according to claim 6, characterized in that: The exhaust ports of the fan and the variable frequency motor are connected to one end of the fan exhaust pipe. The middle part of the fan exhaust pipe is connected to an electric exhaust ball valve, and the top of the fan exhaust pipe is connected to a negative pressure regulating valve. The negative pressure regulating valve is then connected to the oil mist suction chamber of the separation cylinder through a pipe.

8. A centrifugal self-cleaning oil mist separator according to claim 7, characterized in that: The oil mist suction chamber is connected to the high-pressure inlet of the differential pressure controller, and the oil mist separation and collection chamber is connected to the low-pressure inlet of the differential pressure controller. The differential pressure controller is fixed to the outer wall of the separation cylinder by a mounting bracket.

9. A centrifugal self-cleaning oil mist separator according to claim 8, characterized in that: The bottom of the oil mist separation and collection chamber is provided with an oil drain pipe. The oil drain pipe and the fan suction pipe are located on both sides of the separation cylinder. The lower end of the oil drain pipe is connected to a liquid level controller and a two-position two-way solenoid valve. The oil outlet of the two-position two-way solenoid valve is connected to the wall of the oil mist inlet pipe. The first end of the oil mist inlet pipe passes through the side of the separation cylinder at the top of the oil mist separation and collection chamber. Therefore, a negative pressure controller is also provided on the side wall of the oil mist inlet pipe.

10. A centrifugal self-cleaning oil mist separator according to claim 9, characterized in that: The liquid level controller, two-position two-way solenoid valve, negative pressure controller, exhaust electric ball valve, negative pressure regulating valve, differential pressure controller, electric heater, fan and frequency conversion motor are all connected to the PLC control box, and the PLC control box mounting plate is welded to the outer wall of the separator cylinder.

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