Oil mist separator

Abstract

The invention relates to an oil mist separator which comprises a shell, a partition plate fixedly arranged on the inner wall of the shell, a fan, a catching disc, an oil receiving plate arranged on the peripheral side of the catching disc and a heat exchange pipe arranged on the peripheral side of the oil receiving plate, wherein the fan and the catching disc are arranged in the shell and located on the two sides of the partition plate respectively. By means of the double-working-condition design of the heat exchange pipe, a refrigerant is introduced for cooling in the working process, the viscosity of oil drops can be improved, gathering of the oil drops is accelerated, the centrifugal effect of the capturing disc is matched, the oil mist separation efficiency is remarkably improved, and the oil mist separator is suitable for a high-concentration oil mist scene; and during maintenance, a heating medium is introduced for heating, and adhered oil stains can be melted, flow and collected without disassembling the machine, so that the maintenance time is greatly shortened, and the labor cost is reduced. The spiral oil collecting ring is matched with the speed reducer to rotate at a low speed, the problem of poor oil contamination flowability caused by cooling of a refrigerant can be solved, oil drop collection and discharge are accelerated, and continuous and stable operation of equipment is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of gas pollution treatment technology, specifically to an oil mist separator. Background Technology

[0002] During machining processes, a large amount of oil mist-containing waste gas is generated. Direct emission of this gas will pollute the air and harm human health. Existing oil mist separators mostly employ single filtration, centrifugal separation, or condensation separation methods, which have problems such as limited separation efficiency, oil stains easily adhering to the inner walls of the equipment and being difficult to clean, and the need for disassembly during maintenance, leading to cumbersome operations and long downtime. In some condensation separators, the oil stains become less fluid after cooling, easily accumulating on the capture components and oil receiving structure, further affecting the separation effect; while routine maintenance requires disassembling the equipment for cleaning, which not only increases labor costs but also reduces the overall operating efficiency of the equipment, failing to meet the dual requirements of efficient purification and convenient maintenance in industrial production. Summary of the Invention

[0003] In order to solve the above-mentioned problems in the existing technology, the present invention aims to provide an oil mist separator.

[0004] The technical solution adopted in this invention is as follows: An oil mist separator includes a housing, a partition plate fixedly disposed on the inner wall of the housing, a fan and a capture plate respectively disposed inside the housing and located on both sides of the partition plate, an oil receiving plate disposed on the outer periphery of the capture plate, and a heat exchange tube disposed on the outer periphery of the oil receiving plate. When the oil mist separator is working, a refrigerant is introduced into the heat exchange tube to cool the side of the capture plate near the oil receiving plate. When the oil mist separator is being maintained, a heat exchange medium is introduced into the heat exchange tube to heat the oil receiving plate.

[0005] As a preferred embodiment of the present invention, the shell has an open side perpendicular to the partition plate, a support frame is provided on the side of the shell away from its open side, a movable cover plate is rotatably provided on the side of the shell near its open side, one side of the movable cover plate is hollowed out to form an exhaust port, and an air outlet is provided on the fan, the air outlet corresponding to the exhaust port.

[0006] As a preferred embodiment of the present invention, the two side walls of the shell parallel to the partition plate are hollowed out and respectively provided with a fan flange and an air inlet flange. An air inlet connecting pipe is provided through the side of the air inlet flange away from the partition plate, and a preheating ring is fixedly provided on the outer periphery of the air inlet connecting pipe. The heat exchange tube includes an annular pipe section surrounding the periphery of the capture plate, two straight pipe sections connected to the annular pipe section and forming an inlet and outlet respectively, and a pipe flange provided on the straight pipe section for connecting with the shell. The straight pipe section penetrates one side wall of the shell.

[0007] As a preferred embodiment of the present invention, a mounting bracket is fixedly provided at one end of the fan flange near the partition plate, a mounting ring is fixedly provided on the mounting bracket, and a motor is fixedly provided on the mounting ring, the motor being used to drive the fan.

[0008] As a preferred embodiment of the present invention, the fan has an air inlet on the side away from the fan flange, the air inlet of the fan is provided with an air inlet hood, the center of the partition plate forms a connecting port, and the air inlet hood includes a hood flange fixedly connected to the fan air inlet and a conical hood that cooperates with the connecting port.

[0009] As a preferred embodiment of the present invention, the partition plate is provided with a mounting rod fixedly connected to the inner wall of the housing on the side away from the fan, a mounting plate is fixedly provided on the mounting rod, a transition ring that cooperates with the communication port is provided in the middle of the mounting plate, a flow guide is fixedly provided at the end of the mounting plate away from the transition ring, and a slot is provided at the end of the flow guide away from the partition plate.

[0010] As a preferred embodiment of the present invention, a second mounting bracket is provided in the slot, a second mounting ring is fixedly provided on the second mounting bracket, a second motor is provided on the second mounting ring, the second motor is used to drive the oil receiving plate to rotate, a rear baffle is fixedly provided at the end of the second mounting bracket away from the partition plate, the rear baffle is fixedly connected to the end of the oil receiving plate, a front baffle is fixedly provided on the side of the oil receiving plate away from the rear baffle, the front baffle is fixedly mounted on the support plate, and the support plate is fixedly connected to the inner wall of the housing.

[0011] As a preferred embodiment of the present invention, the capture plate includes a mounting plate, a plurality of oil receiving rods fixedly disposed around the periphery of the mounting plate, a support ring fixedly disposed at one end of the oil receiving rods away from the mounting plate, and a central shaft fixedly disposed on the mounting plate; the output shaft of the second motor is connected to the central shaft through a coupling.

[0012] As a preferred embodiment of the present invention, an oil collecting ring is provided on one side of the capturing disc. The oil collecting ring is a single-turn spiral, and both ends of the oil collecting ring are respectively formed with inclined surfaces. The two ends of the oil collecting ring are fixedly connected by a connecting rod. A reducer is provided on the side of the mounting disc near the partition plate. The inner ring of the reducer is connected to the mounting disc. Two connecting washers are provided on the outer ring of the reducer. A support rod is fixedly provided at the ends of the two connecting washers that are far apart from each other. The ends of the two support rods that are far apart from each other are respectively fixedly connected to the connecting rod and the oil collecting ring.

[0013] As a preferred embodiment of the present invention, the side of the oil receiving plate away from the opening of the shell is hollowed out to form an oil dripping mesh, and a collection box fixedly connected to the inner wall of the shell is provided on one side of the oil receiving plate.

[0014] The beneficial effects of this invention are as follows: As an oil mist separator, this invention combines the advantages of high-efficiency separation and convenient maintenance. Through the dual-condition design of the heat exchange tube, during operation, a refrigerant is introduced for cooling, which can improve the viscosity of oil droplets and accelerate their aggregation. Combined with the centrifugal action of the capture plate, this significantly improves the oil mist separation efficiency and is suitable for high-concentration oil mist scenarios. During maintenance, a heating medium is introduced for heating, which melts and collects the adhering oil without disassembling the machine, greatly shortening maintenance time and reducing labor costs. The preheating ring at the air inlet can prevent condensation and oil accumulation in the front of the gas, reducing the frequency of early maintenance. The spiral oil collection ring, combined with the low-speed rotation of the reducer, can solve the problem of poor oil flow caused by refrigerant cooling, accelerate the aggregation and discharge of oil droplets, and ensure the continuous and stable operation of the equipment. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0016] Figure 1 This is an exploded structural diagram of the present invention; Figure 2 This is the present invention. Figure 1 A schematic diagram of the fan section structure; Figure 3 This is the present invention. Figure 1 Schematic diagram of the capture disc section; Figure 4 This is the present invention. Figure 1 A schematic diagram of the assembled structure; Figure 5 This is the present invention. Figure 4 Schematic diagram of cross-sectional structure; Figure 6 This is the present invention. Figure 4 Schematic diagram of the shell structure after it is concealed; Figure 7 This is the present invention. Figure 6 Schematic diagram of the capture disc section; Figure 8 This is the present invention. Figure 7 A schematic diagram of the oil collecting ring section. Detailed Implementation

[0017] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structure, features and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0018] Combination Figures 1-8An oil mist separator includes a housing 18, a partition plate 20 fixedly disposed on the inner wall of the housing 18, a fan 14 and a capture plate 30 respectively disposed inside the housing 18 and located on both sides of the partition plate 20, an oil receiving plate 28 disposed on the outer periphery of the capture plate 30, and a heat exchange tube 24 disposed on the outer periphery of the oil receiving plate 28. When the oil mist separator is working, refrigerant is introduced into the heat exchange tube 24 to cool the side of the capture plate 30 near the oil receiving plate 28. When the oil mist separator is under maintenance, heat exchanger is introduced into the heat exchange tube 24 to heat the oil receiving plate 28. A dual-condition heat exchanger is used in conjunction with the heat exchange tube 24. Dual-condition heat exchangers are common in the art; this equipment can operate stably in both modes by using refrigerant in cooling mode and heat exchanger in heating mode. During separation, the refrigerant is used to reduce the oil droplet flow rate and increase the oil droplet viscosity, enabling the oil droplets to converge quickly. This allows the capture plate 30 to capture more oil mist in the same amount of time, thus improving the separation efficiency of the oil mist separator. During maintenance, the heat medium is used to increase the temperature of the capture plate 30, heating the oil stains adhering to the related components. The oil stains flow quickly and are collected, allowing for rapid maintenance without disassembling the machine.

[0019] Advantageously, the housing 18 has an open side perpendicular to the partition plate 20, and a support frame 17 is provided on the side of the housing 18 away from its open side. A movable cover plate 16 is rotatably provided on the side of the housing 18 near its open side, and one side of the movable cover plate 16 is hollowed out to form an exhaust port 15. The fan 14 is provided with an air outlet 37, which corresponds to the exhaust port 15. The fan 14 actively guides the airflow through the oil mist separator, not relying entirely on the flow rate of the gas when it enters the inlet connecting pipe 34.

[0020] Advantageously, the two side walls of the housing 18, parallel to the partition plate 20, are hollowed out and respectively provided with a fan flange 11 and an air inlet flange 33. An air inlet connecting pipe 34 is provided through the side of the air inlet flange 33 away from the partition plate 20, and a preheating ring 35 is fixedly provided on the outer periphery of the air inlet connecting pipe 34. The heat exchange pipe 24 includes an annular pipe section 41 surrounding the periphery of the capture plate 30, two straight pipe sections 46 connected to the annular pipe section 41 and forming inlets and outlets respectively, and a pipe flange 45 provided on the straight pipe section 46 for connecting with the housing 18. The straight pipe section 46 penetrates one side wall of the housing 18. The partition plate 20 divides the equipment into two areas. The side where the fan 14 is located is less contaminated by oil droplets than the side where the capture plate 30 is located, allowing for targeted operation when the equipment needs to be disassembled for maintenance.

[0021] Advantageously, a mounting bracket 13 is fixedly provided at one end of the fan flange 11 near the partition plate 20. A mounting ring 36 is fixedly provided on the mounting bracket 13, and a motor 12 is fixedly provided on the mounting ring 36. The motor 12 is used to drive the fan 14. The fan 14 is controlled to operate at a reasonable speed according to the amount of oil mist in the gas.

[0022] Advantageously, the fan 14 has an air inlet on the side away from the fan flange 11, and the air inlet of the fan 14 is provided with an air inlet hood 19. A connecting port 40 is formed at the center of the partition plate 20. The air inlet hood 19 includes a hood flange 38 fixedly connected to the air inlet of the fan 14 and a conical hood 39 that cooperates with the connecting port 40. The air inlet hood 19 is part of the fan 14 and is recessed inside the fan 14 body, while the guide hood 23 is an external device installed between the fan 14 and the capture plate 30 to prevent gas from flowing to other parts of the equipment and to prevent the drive components and control circuits from being contaminated with excessive oil.

[0023] Advantageously, the partition plate 20 is provided with a mounting rod 21 on the side away from the fan 14, which is fixedly connected to the inner wall of the housing 18. A mounting plate 22 is fixedly provided on the mounting rod 21. A transition ring 42 that cooperates with the communication port 40 is provided in the middle of the mounting plate 22. A flow guide 23 is fixedly provided at the end of the mounting plate 22 away from the transition ring 42. A slot 43 is provided at the end of the flow guide 23 away from the partition plate 20.

[0024] Advantageously, a mounting bracket 27 is provided in the slot 43, and a mounting ring 47 is fixedly mounted on the mounting bracket 27. A motor 25 is mounted on the mounting ring 47, and the motor 25 is used to drive the oil receiving plate 28 to rotate. A rear baffle 49 is fixedly mounted on the end of the mounting bracket 27 away from the partition plate 20. The rear baffle 49 is fixedly connected to the end of the oil receiving plate 28. A front baffle 31 is fixedly mounted on the side of the oil receiving plate 28 away from the rear baffle 49. The front baffle 31 is fixedly mounted on the support plate 32, and the support plate 32 is fixedly connected to the inner wall of the housing 18. The front baffle 31, the rear baffle 49, and the oil receiving plate 28 form an annular groove, in which oil droplets are collected and then gradually converge at the lowest point.

[0025] Advantageously, the capturing disc 30 includes a mounting disc 54, a plurality of oil-collecting rods 56 fixedly disposed around the periphery of the mounting disc 54, a support ring 57 fixedly disposed at the end of the oil-collecting rods 56 away from the mounting disc 54, and a central shaft 55 fixedly disposed on the mounting disc 54; the output shaft of the second motor 25 is connected to the central shaft 55 via a coupling 44. The high-speed rotation of the capturing disc 30 generates centrifugal force, and oil mist particles are thrown towards the wall and agglomerate on the oil-collecting plate 28 due to density differences. Gas is discharged from the center and flows to the fan 14, which is suitable for machining workshops with high concentrations of oil mist.

[0026] Advantageously, an oil collecting ring 29 is provided on one side of the capturing plate 30. The oil collecting ring 29 is a single-turn spiral. The two ends of the oil collecting ring 29 form inclined surfaces 58 respectively. The two ends of the oil collecting ring 29 are fixedly connected by a connecting rod 50. A reducer 52 is provided on the side of the mounting plate 54 near the partition plate 20. The inner ring of the reducer 52 is connected to the mounting plate 54. Two connecting washers 53 are provided on the outer ring of the reducer 52. A support rod 51 is fixedly provided at the ends of the two connecting washers 53 that are far apart from each other. The ends of the two support rods 51 that are far apart from each other are fixedly connected to the connecting rod 50 and the oil collecting ring 29 respectively. Because the heat exchange tube 24 is filled with refrigerant, the temperature of the oil receiving plate 28 is low. The oil droplets on the inner wall of the oil receiving plate 28 flow more slowly than normal. When the oil mist content in the gas is high, a large number of oil droplets that are not easy to flow adhere to the inner wall of the oil receiving plate 28, which interferes with the normal operation of the equipment. The negative effect of the heat exchange tube 24 being filled with refrigerant is eliminated by setting an oil collecting ring 29. Under the deceleration action of the reducer 52, the oil collecting ring 29 rotates at a low speed, which will not damage the oil receiving plate 28, nor will it generate a large amount of heat due to friction. The reducer 52 is preferably a flexible gear reducer, with the inner ring inputting at a high speed and the outer ring outputting at a low speed after being reduced by the flexible gear.

[0027] Advantageously, the oil receiving plate 28 has a perforated side away from the open end of the housing 18 to form an oil dripping mesh 48, and a collection box 26 fixedly connected to the inner wall of the housing 18 is provided on one side of the oil receiving plate 28. A filter cloth can be placed inside the collection box 26, and a movable groove can be opened at the bottom of the housing 18 to facilitate the periodic replacement of the filter cloth in the collection box 26.

[0028] Working principle of this invention: In the initial state, the air inlet connecting pipe 34 is connected to the air inlet pipe, the inlet and outlet of the straight pipe section 46 are connected to the dual-condition heat exchanger respectively, and the movable cover plate 16 is closed.

[0029] When the oil mist separator is working normally, it separates the oil mist in the gas flowing through the inlet connecting pipe 34, and the dual-condition heat exchanger supplies refrigerant to the heat exchange tube 24.

[0030] As the gas flows through the inlet connecting pipe 34, the preheating coil 35 continues to work to preheat the gas. Before the gas reaches the capture plate 30, it will not easily form condensed oil droplets that adhere to the front of the equipment, thus reducing the maintenance frequency of the front of the equipment.

[0031] Motor 25 operates continuously, driving the mounting plate 54 to rotate via coupling 44 and central shaft 55. Central shaft 55, oil receiving rod 56, and support ring 57 rotate synchronously with mounting plate 54. When gas flows through capturing plate 30, the high-speed rotating capturing plate 30 collides with and captures oil mist particles in the gas, causing the oil mist particles to adhere to oil receiving rod 56. Due to centrifugal force, the oil mist particles converge towards the edge of capturing plate 30. The refrigerant flowing in the ring pipe section 41 cools the edge of capturing plate 30 through direct and indirect contact. The oil mist particles that converge at the edge of capturing plate 30 gather into oil droplets, which are then thrown onto the inner wall of oil receiving plate 28. The rear baffle 49 and front baffle 31 keep the oil droplets on the inner wall of oil receiving plate 28, preventing them from overflowing. Under the influence of gravity, the oil droplets slide down the inner wall of the oil receiving plate 28 and drip into the collection box 26 at the oil dripping net 48. The oil mist in the gas is separated and collected by the oil drain pipe at the bottom of the collection box 26.

[0032] During the above process, the inner ring of the reducer 52 and the mounting plate 54 rotate synchronously. After the flex wheel reduces speed, the outer ring of the reducer 52 rotates at a very low speed. The connecting gasket 53, support rod 51, connecting rod 50 and oil collecting ring 29 rotate synchronously with the outer ring of the reducer 52. The inclined surface 58 contacts the oil droplets on the inner wall of the oil receiving plate 28. When the oil collecting ring 29 rotates, the oil droplets are gradually concentrated on one side, and the dispersed oil droplets can quickly converge into large oil droplets, accelerating the oil droplets to slide along the inner wall of the oil receiving plate 28 to the oil drip net 48, thus avoiding interference with the flow of oil droplets after the heat exchange tube 24 is filled with refrigerant.

[0033] After most of the oil mist is separated by the capture plate 30, the clean gas is guided by the guide shroud 23 under the operation of the fan 14, enters the air inlet shroud 19 through the air inlet shroud 19, is discharged from the air outlet 37, and escapes to the outside of the oil mist separator through the exhaust port 15.

[0034] During the maintenance of the oil mist separator, stop the flow of oil-mist-containing gas into the inlet connection pipe 34. The dual-condition heat exchanger supplies heat medium to the heat exchange tube 24, and the motor 25 rotates at low speed. The heat exchange tube 24 raises the temperature of the oil receiving plate 28, the oil collecting ring 29, and the capturing plate 30. The oil droplets remaining in this part are affected by the high temperature and no longer adhere to the equipment. They flow faster, and are finally collected by the collection box 26, which is the same principle as above. The oil mist separator can be quickly maintained without disassembling the equipment.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An oil mist separator, characterized in that The oil mist separator comprises a shell, a partition plate fixed on the inner wall of the shell, a fan and a capturing disc arranged on both sides of the partition plate, an oil collecting plate arranged on the periphery of the capturing disc, and a heat exchange pipe arranged on the periphery of the oil collecting plate.

2. An oil mist separator according to claim 1, characterized in that The shell is open on the side perpendicular to the partition plate, and a support frame is arranged on the side of the shell away from the opening. A movable cover plate is rotatably arranged on the side of the shell close to the opening. The movable cover plate is hollow on one side to form an exhaust port. An air outlet is arranged on the fan, and the air outlet corresponds to the exhaust port.

3. An oil mist separator according to claim 1, characterized in that The two side walls of the shell parallel to the partition plate are hollow and are respectively provided with a fan flange and an air inlet flange. The air inlet flange is provided with an air inlet connecting pipe penetrating the side away from the partition plate. A preheating ring is fixed on the outer periphery of the air inlet connecting pipe.

4. An oil mist separator according to claim 3, characterised in that The heat exchange pipe comprises a ring pipe section surrounding the periphery of the capturing disc, two straight pipe sections connected with the ring pipe section and respectively forming an inlet and an outlet, and a pipe mouth flange arranged on the straight pipe section and used for connecting with the shell. The straight pipe section penetrates one of the side walls of the shell.

5. An oil mist separator according to claim 4, characterised in that One end of the fan flange close to the partition plate is fixedly provided with a mounting frame one. An installation ring one is fixedly arranged on the mounting frame one. A motor one is fixedly arranged on the installation ring one. The motor one is used for driving the fan.

6. An oil mist separator according to claim 5, characterised in that The fan is provided with an air inlet on the side away from the fan flange. The air inlet of the fan is provided with an air inlet cover. A communication port is formed at the center of the partition plate. The air inlet cover comprises a cover flange fixedly connected with the air inlet of the fan and a conical cover matched with the communication port.

7. An oil mist separator according to claim 6, characterised in that The partition plate is provided with a mounting rod fixedly connected with the inner wall of the shell on the side away from the fan. An installation plate is fixedly arranged on the mounting rod. A transition ring is arranged in the middle of the installation plate and matched with the communication port. A flow guide cover is fixedly arranged on the end of the installation plate away from the transition ring. A clamping groove is arranged on the end of the flow guide cover away from the partition plate.

8. An oil mist separator according to claim 7, characterised in that A mounting frame two is arranged in the clamping groove. An installation ring two is fixedly arranged on the mounting frame two. A motor two is arranged on the installation ring two. The motor two is used for driving the oil collecting plate to rotate. A back baffle is fixedly arranged on the end of the mounting frame two away from the partition plate. The back baffle is fixedly connected with the end of the oil collecting plate. A front baffle is fixedly arranged on the side of the oil collecting plate away from the back baffle. The front baffle is fixedly arranged on a support plate. The support plate is fixedly connected with the inner wall of the shell. The capturing disc comprises a mounting disc, a plurality of oil collecting rods fixedly arranged on the periphery of the mounting disc, a support ring fixedly arranged on the end of the oil collecting rod away from the mounting disc, and a center shaft fixedly arranged on the mounting disc. The output shaft of the motor two is connected with the center shaft through a shaft coupling.

9. An oil mist separator according to claim 8, characterised in that The side of the capture disc is provided with an oil collecting ring, the oil collecting ring is single ring spiral, the two ends of the oil collecting ring are respectively formed with inclined surfaces, the two ends of the oil collecting ring are fixedly connected through a connecting rod, the side of the mounting disc close to the partition plate is provided with a speed reducer, the inner ring of the speed reducer is connected with the mounting disc, the outer ring of the speed reducer is provided with two connecting washers, the ends of the two connecting washers away from each other are respectively fixedly provided with a supporting rod, the ends of the two supporting rods away from each other are respectively fixedly connected with the connecting rod and the oil collecting ring.

10. An oil mist separator according to claim 1, characterized in that The side of the oil collecting plate away from the open side of the shell is hollow to form an oil dripping net, and the side of the oil collecting plate is provided with a collecting box fixedly connected with the inner wall of the shell.

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