Multi-stage sealing oil purification system

Abstract

This utility model discloses a multi-stage sealing oil purification system, including a waste oil storage and sedimentation device, and further including a primary waste oil treatment device, a secondary waste oil treatment device, and a vacuum dehydration treatment device sequentially arranged downstream of the waste oil storage and sedimentation device. The primary and secondary waste oil treatment devices are cyclically connected. The beneficial effects of this utility model are: after the sealing oil undergoes cyclic treatment by the two-stage waste oil treatment devices, the waste oil is centrifuged to remove impurities, and then dehydrated by the vacuum dehydration equipment to obtain purified oil. This achieves the recycling of waste oil, saves energy, and reduces production costs.

Description

Technical Field

[0001] This utility model relates to the field of rubber product manufacturing technology, and in particular to a multi-stage sealing oil purification system. Background Technology

[0002] Internal mixer rubber mixing is the first step in rubber product manufacturing. To ensure lubrication of the bearings at both ends of the rotor during internal mixer operation and to prevent dust leakage from the moving and stationary rings of the internal mixer from affecting the surrounding environment, internal mixers are equipped with a device to pump sealing oil to the rotor. However, due to the working environment of internal mixer rubber mixing, the sealing oil returning from the internal mixer becomes sludge mixed with a large amount of impurities such as iron filings, rubber sludge, and carbon black dust. This sludge is different from conventional sludge; it contains many impurities and is very viscous, making it impossible to directly recycle or purify.

[0003] Currently, the commonly used method for treating oily waste involves collecting the oil and then applying high temperatures for static filtration. This method consumes a large amount of filter media, has high processing costs, requires significant labor, and generates a large amount of hazardous waste, especially discarded filter cartridges, causing secondary pollution. Furthermore, the prolonged high temperatures affect the oil quality, resulting in a low pass rate for the filtered oil, making it difficult to reuse. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical defects and propose a multi-stage sealing oil purification system to realize the recycling, purification and reuse of sealing oil.

[0005] The technical solution adopted by this utility model to achieve its technical purpose is: a multi-stage sealing oil purification system, including a sludge oil storage and sedimentation device, and further including a primary sludge oil treatment device, a secondary sludge oil treatment device, and a vacuum dehydration treatment device arranged sequentially downstream of the sludge oil storage and sedimentation device, wherein the primary sludge oil treatment device and the secondary sludge oil treatment device are circulatedly connected. The oily waste storage and settling device includes an oily waste storage tank, an oily waste inlet at the top of the tank, an oily sludge outlet at the bottom, and a high-level sensor, a medium-level sensor, and a low-level sensor arranged sequentially from top to bottom on the side. A spiral desludge remover is installed inside the oily waste storage tank, parallel to the oily sludge outlet. A pneumatic butterfly valve is installed at the oily sludge outlet, and an oily sludge tank (No. 1) is located below the oily sludge outlet.

[0006] Preferably, the primary sludge treatment device includes a primary filter tank, which contains a stainless steel filter screen, a high-level sensor and a low-level sensor on its outer wall, and a valve at its bottom. Below the primary filter tank is a No. 1 circulating tank, and downstream of the No. 1 circulating tank is a No. 2 circulating tank. Both the No. 1 and No. 2 circulating tanks have high-level and low-level sensors on their side walls. The device also includes a No. 1 centrifuge connected to both the No. 1 and No. 2 circulating tanks, with a scraper inside the No. 1 centrifuge and a No. 2 sludge tank below it. A heater is also provided between the No. 1 centrifuge and the No. 2 circulating tank. The secondary oily waste treatment device includes a No. 3 circulating oil tank connected to the No. 2 circulating oil tank, and a No. 4 circulating oil tank downstream of the No. 3 circulating oil tank. High-level and low-level sensors are installed on the side walls of both the No. 3 and No. 4 circulating oil tanks. It also includes a No. 2 centrifuge connected to both the No. 3 and No. 4 circulating oil tanks. A scraper is installed inside the No. 2 centrifuge, and a high-concentration impurity oil collection tank is located below it. The high-concentration impurity oil collection tank is equipped with high-level and low-level sensors and is connected to the primary filter tank via an oil pump and pipeline. A heater is also provided between the No. 4 circulating oil tank and the No. 2 centrifuge; a high-precision filter is provided on the high-concentration impurity oil collection tank and on one side of the No. 2 centrifuge. The high-precision filter is equipped with a differential pressure gauge, and the inlet of the high-precision filter is connected to the No. 4 circulating oil tank through a magnetic attraction device and pipeline. The outlet is connected to the No. 1 storage tank through a valve and pipeline, and the other is connected to the primary filter oil tank. The magnetic attraction device is set between the oil outlet of the No. 4 circulating oil tank and the circulating motor. Its specific function is to adsorb magnetic particles in the primary filter oil output from the No. 4 circulating oil tank, so as to prevent magnetic particles from contaminating the high-precision filter.

[0007] The vacuum dehydration treatment device includes a vacuum dehydration unit. The inlet of the vacuum dehydration unit is connected to the No. 1 oil storage tank through a heater and a pipeline, and the outlet is connected to the No. 2 oil storage tank through a pipeline.

[0008] Preferably, the vacuum dehydration equipment includes a dehydration tank connected to a vacuum pump. A vacuum pressure gauge, an electromagnetic air inlet valve, a pressure safety valve, and a pneumatic ball valve are provided on the upper part of the dehydration tank. A low level gauge, a high level gauge, and a safety level gauge are provided on the side wall of the dehydration tank. A cooler is also provided.

[0009] The beneficial effects of this invention are as follows: After the sealing oil undergoes two-stage waste oil treatment, it is centrifugally cleaned to remove impurities, and then dehydrated by a vacuum dehydration device to obtain purified oil. This enables the recycling of waste oil and simultaneously achieves self-cleaning of the purification equipment, saving energy and reducing production costs. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall principle of this utility model; Figure 2 A schematic diagram of a waste oil storage and sedimentation device; Figure 3 This is a schematic diagram of a primary oily waste treatment unit. Figure 4 This is a schematic diagram of a secondary oily waste treatment device; Figure 5 This is a schematic diagram of a vacuum dehydration treatment device. Figure 6 This is a schematic diagram of a centrifugal filter.

[0011] The diagram is marked as follows: 1. Waste oil storage and settling device; 11. Waste oil storage tank; 12. Waste oil inlet. 13. Sludge outlet; 14. High liquid level sensor; 15. Medium liquid level sensor; 16. Low liquid level sensor; 17. Spiral desludge remover; 18. Pneumatic butterfly valve; 19. No. 1 oil sludge tank; 2. Primary sludge treatment device; 21. Pre-filter oil tank; 22. Stainless steel filter screen; 23. High liquid level sensor; 24. Low liquid level sensor; 25. Valve; 26. Circulating oil tank #1; 27. Circulating oil tank #2; 28. High level sensor; 29. ​​Low level sensor; 210. Centrifuge #1; 211. Sludge tank #2; 212. Heater; 3. Secondary oily waste treatment device; 31. No. 3 circulating oil tank; 32. No. 4 circulating oil tank; 33. High liquid level sensor; 34. Low liquid level sensor; 35. Centrifuge #2; 36. High-concentration impurity oil collection tank; 38. High liquid level sensor; 39. Low liquid level sensor; 310. Oil pump; 311. Heater; 312. High-precision filter; 313. Differential pressure gauge; 314. Magnetic suction device; 315. No. 1 oil storage tank; 316. Circulating motor; 4. Vacuum dehydration treatment device; 41. Vacuum dehydration equipment; 42. Heater; 43. No. 2 oil storage tank; 411. Dehydration tank; 412. Vacuum pump; 413. Vacuum pressure gauge; 414. Electromagnetic inlet valve; 415. Pressure safety valve; 416. Pneumatic ball valve; 417. Low level gauge; 418. High level gauge; 419. Safety level gauge; 420. Cooler.

[0012] 5. Centrifuge mechanism; 51. Centrifuge base; 52. Rotary drum; 53. Rotary drum bearing housing; 54. Rotary drum shaft; 55. Drum synchronizer pulley; 56. Support frame; 57. Drum servo motor; 58. Drum servo motor synchronizer pulley; 59. Belt; 6. Automatic slag discharge mechanism; 61. Slag discharge reduction motor; 62. Drive shaft; 64. Opening and closing cylinder; 65. Upper shift fork; 66. High-speed bearing; 67. Scraper shaft; 68. Lower shift fork; 69. Rotary scraper; 610. Locking cylinder; 611. Locking pin; 612. Pin hole. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0014] like Figure 1-6 As shown: I. A multi-stage sealing oil purification system, including a waste oil storage and settling device 1, and further including a primary waste oil treatment device 2, a secondary waste oil treatment device 3, and a vacuum dehydration treatment device 4 arranged sequentially downstream of the waste oil storage and settling device 1, wherein the primary waste oil treatment device 2 and the secondary waste oil treatment device 3 are circulatedly connected.

[0015] II. The aforementioned sludge storage and settling device 1 includes a sludge storage tank 11. A sludge inlet 12 is provided at the top of the sludge storage tank 11, and a sludge outlet 13 is provided at the bottom. A high liquid level sensor 14, a medium liquid level sensor 15, and a low liquid level sensor 16 are arranged sequentially from top to bottom on the side. A spiral desludge remover 17 is provided inside the sludge storage tank 11 and parallel to the sludge outlet 13. A pneumatic butterfly valve 18 is provided at the sludge outlet 13, and a No. 1 sludge tank 19 is provided below the sludge outlet 13.

[0016] III. The primary sludge treatment device 2 includes a primary filter tank 21, a stainless steel filter screen 22 inside the primary filter tank 21, a high liquid level sensor 23 and a low liquid level sensor 24 on the outer wall, and a valve 25 at the bottom; a No. 1 circulating oil tank 26 is located below the primary filter tank 21, and a No. 2 circulating oil tank 27 is located downstream of the No. 1 circulating oil tank 26; a high liquid level sensor 28 and a low liquid level sensor 29 are located on the side walls of both the No. 1 circulating oil tank 26 and the No. 2 circulating oil tank 27; it also includes a No. 1 centrifuge 210 connected to both the No. 1 circulating oil tank 26 and the No. 2 circulating oil tank 27, a scraper inside the No. 1 centrifuge 210, a No. 2 sludge tank 211 below it, and a heater 212 between the No. 1 centrifuge 210 and the No. 2 circulating oil tank 27; The secondary oily waste treatment device 3 includes a third circulating oil tank 31 connected to the second circulating oil tank 27, and a fourth circulating oil tank 32 located downstream of the third circulating oil tank 31. High-level sensors 33 and low-level sensors 34 are installed on the side walls of both the third and fourth circulating oil tanks 31 and 32. It also includes a second centrifuge 35 connected to both the third and fourth circulating oil tanks 31 and 32. A scraper is installed inside the second centrifuge 35, and a high-concentration impurity oil collection tank 36 is located below it. The high-concentration impurity oil collection tank 36 is equipped with high-level sensors 38 and low-level sensors 39, and is connected to the primary filter tank 21 via an oil pump 310 and pipelines. A heater 311 is also provided between the No. 4 circulating oil tank 32; a high-precision filter 312 is provided on the high-concentration impurity oil collection tank 36 and on one side of the No. 2 centrifuge 35. The high-precision filter 312 is equipped with a differential pressure gauge 313, and the inlet of the high-precision filter 312 is connected to the No. 4 circulating oil tank 32 through a magnetic attraction device 314 and a pipeline. The outlet is connected to the No. 1 storage tank 315 through a valve and a pipeline, and the other is connected to the primary filter tank 21. The magnetic attraction device 314 is set between the oil outlet of the No. 4 circulating oil tank 32 and the circulating motor 316. Its specific function is to adsorb magnetic particles in the primary filter oil output from the No. 4 circulating oil tank 32 to prevent magnetic particles from contaminating the high-precision filter 312.

[0017] The vacuum dehydration treatment device 4 includes a vacuum dehydration device 41. The inlet of the vacuum dehydration device 41 is connected to the No. 1 oil storage tank 315 through a heater 42 and a pipeline, and the outlet is connected to the No. 2 oil storage tank 43 through a pipeline.

[0018] IV. The vacuum dehydration equipment 41 includes a dehydration tank 411, which is connected to a vacuum pump 412. A vacuum pressure gauge 413, an electromagnetic air inlet valve 414, a pressure safety valve 415, and a pneumatic ball valve 416 are provided on the upper part of the dehydration tank 411. A low level gauge 417, a high level gauge 418, and a safety level gauge 419 are provided on the side wall of the dehydration tank 411. A cooler 420 is also provided. When the vacuum pump 412 is working, it provides a vacuum environment for the dehydration tank 411, which is conducive to the evaporation of water. The vacuum pressure gauge 413 can display the vacuum pressure in the dehydration tank 411 in real time. The electromagnetic air inlet valve 414 is a normally open structure. When the vacuum pump 412 is not running, this valve is open to allow the dehydration tank 411 to communicate with the atmosphere, which is convenient for the oil pump to suck up oil. When the vacuum pump 412 is running, this valve is closed to isolate the dehydration tank 411 from the external environment and provide vacuum conditions. The pressure safety valve 415 plays a protective role to prevent the oil pump from continuing to work and damaging the tank body of the dehydration tank 411 when the level gauge fails. The pneumatic ball valve 416 plays a switching role. After dehydration, it can be opened to connect to the oil pump and discharge the oil in the tank. There are 3 sets of level gauges, namely low level, high level and safety level, which can output different signals to the PLC for the PLC program to select. The cooler 420 is air-cooled, which can cool the evaporated water and condense the water vapor into liquid water for collection.

[0019] V. A multi-stage sealing oil purification system, the purification method of which includes the following steps: S1: Sludge oil is injected into the sludge oil storage tank 11. When the oil level reaches the high level, the high level sensor 14 provides feedback and stops the injection of oil into the sludge oil storage tank 11. When the oil level is in the middle level, the middle level sensor 15 provides feedback and controls the injection of oil into the sludge oil storage tank 11. When the oil level is in the low level, the low level sensor 16 provides feedback, indicating a safe alarm level. S2: The sludge settles naturally in the sludge storage tank 11. The upper oil flows through the valve to the primary filter tank 21 by gravity. At the same time, the solid impurity content parameter of the lower sludge is set. After the standard is met, the motor is started at a time to open the pneumatic butterfly valve 18 and start the spiral desludge machine 17 to discharge the settled solid impurities and unload them into the No. 1 sludge tank 19 for collection. S3: The sludge oil completes its initial filtration in the primary filter tank 21, and according to the set parameters, it flows by gravity through the valve to the No. 1 circulating oil tank 26 below it. S4: High level sensor 23 and low level sensor 24 are installed on the side walls of circulating oil tank 26 and circulating oil tank 27 to control the alternating supply of oil from circulating oil tank 26 and circulating oil tank 27 to centrifuge 210 and to control the alternating collection of oil processed by centrifuge 210. When circulating oil tank 26 and circulating oil tank 27 alternately supply oil to centrifuge 210 by oil pump, heater 212 installed on the pipeline before supplying oil to centrifuge 210 heats the oil to the set temperature. S5: The sludge adhering to the drum of centrifuge 210 during operation is scraped off by a scraper according to the set time and falls into sludge tank 211 below centrifuge 210 by gravity for collection. S6: After multiple cycles of processing, the sludge is pumped to the No. 3 circulating oil tank 31 of the secondary sludge treatment unit; S7: On the side walls of circulating oil tanks 3# and 4#, high level sensors 33 and low level sensors 34 are used to control the alternating supply of oil from circulating oil tanks 3# and 4# to centrifuge 2#, and to control the alternating collection of oil processed by centrifuge 2# by circulating oil tanks 3# and 4#. When circulating oil tanks 3# and 4# alternately supply oil to centrifuge 2# by oil pump, a heater 311 installed on the pipeline before supplying oil to centrifuge 2# heats the oil to a set temperature. Both centrifuges S8#1 (210) and #2 (35) have self-cleaning functions during operation, and both include a centrifugation mechanism 5 and an automatic slag discharge mechanism 6. The centrifugation mechanism 5 includes a centrifuge base 51, a drum 52 below the centrifuge base 51, a drum bearing chamber 53 above the drum base 51, a drum shaft 54 ​​fitted inside the drum bearing chamber 53, the lower end of the drum shaft 54 ​​connected to the drum 52, the upper end extending upward and out of the drum bearing chamber 53, a drum synchronous pulley 55 fitted at the top of the drum bearing chamber 53, a support frame 56 outside the drum bearing chamber 53, a drum servo motor 57 on the support frame 56, a drum servo motor synchronous pulley 58 on the output shaft of the drum servo motor 57, and the drum synchronous pulley 58 and the drum servo motor synchronous pulley 58 connected by a belt 59. The automatic slag discharge mechanism 6 includes a slag discharge reduction motor 61, which is equipped with a transmission shaft 62. The upper end of the transmission shaft 62 is equipped with an opening and closing cylinder 64, and the lower end is provided with an upper fork 65. The drum shaft 54 ​​is hollow, and a high-speed bearing 66 is provided inside the drum shaft 54. A scraper shaft 67 is equipped inside the high-speed bearing 66. The upper end of the scraper shaft 67 is equipped with the upper fork 65 through a lower fork 68, and the lower end extends into the drum 52. A rotating scraper 69 is provided inside the drum 52 and at the lower end of the scraper shaft 67. On the centrifuge base 51, on one side of the drum bearing chamber 53, a locking cylinder 610 is also provided. The piston rod of the locking cylinder 610 is provided with a locking pin 611 at its end. The top of the drum 52 is provided with a pin hole 612. The locking pin 611 can be inserted into the pin hole 612 and lock the drum 52.

[0020] The centrifugal filter includes a centrifugal mechanism 5 and an automatic slag discharge mechanism 6. Self-cleaning parameters (start time, running time, stop time, etc.) are set in the human-machine interface. The system operates automatically according to the preset program, periodically discharging slag to ensure filtration efficiency. Specifically: the slag discharge reduction motor 61 provides power, driving the rotating scraper 69 to rotate via the transmission shaft 63; the locking cylinder 610 drives the locking pin 611 in linear motion. When the locking pin 611 extends, it inserts into the pin hole 612 and locks the rotating drum 52, preventing the rotating drum 52 from moving with the rotating scraper 69.

[0021] The self-cleaning process is as follows: When centrifugation is in progress, the locking cylinder 610 is opened, the rotating scraper 69 rotates with the drum 52, the purified oil seeps out of the drum 52, and solid impurities adhere to the inner wall of the drum 52; when centrifugation is finished, the locking cylinder 610 is locked, only the rotating scraper 69 rotates, and the rotating scraper 69 scrapes off the solid impurities adhering to the inner wall of the drum 52.

[0022] The treated high-concentration impurity oil automatically falls into the high-concentration impurity oil collection tank 36 below centrifuge 2# 35. The high-level sensor 38 and low-level sensor 39 on the high-concentration impurity oil collection tank 36 pump the high-concentration impurity oil back to the primary filter oil tank 21 at any time according to the set parameters. S9: After multiple cycles, the sludge oil leaves the No. 4 circulating oil tank 32 and first passes through the magnetic adsorption device 314 to adsorb metal particles. Then it is pumped to the high-precision filter 312 for precision filtration. The filtered oil enters the No. 1 storage tank 315 for storage. S10: After the filter element of the high-precision filter 312 has been working for a period of time, when the differential pressure gauge detects that the pressure difference exceeds the set value, the back cleaning function is activated. The oil in the No. 1 oil storage tank 315 enters the high-precision filter 312 in reverse through the oil pump, cleaning off the impurities attached to the filter element and transporting them to the primary filter oil tank 21. S11: The oil in storage tank 315 is pumped to vacuum dehydration equipment 41. A pipeline heater 42 is installed on the pipeline from storage tank 315 to vacuum dehydration equipment 41 to heat the oil to the set temperature. After the oil enters vacuum dehydration equipment 41, the water is dispersed by Pall rings and vacuum boiled, then separated from the oil and condensed and collected. The dehydrated oil enters storage tank 43. The oil stored at this time is purified oil.

Claims

1. A multi-stage seal oil purification system comprising a dirty oil storage settling device, characterized by: It also includes a primary sludge treatment device, a secondary sludge treatment device, and a vacuum dehydration treatment device, which are sequentially arranged downstream of the sludge storage and sedimentation device, with the primary sludge treatment device and the secondary sludge treatment device being circulated and connected. The oily waste storage and settling device includes an oily waste storage tank, an oily waste inlet at the top of the tank, an oily sludge outlet at the bottom, and a high-level sensor, a medium-level sensor, and a low-level sensor arranged sequentially from top to bottom on the side. A spiral desludge remover is installed inside the oily waste storage tank, parallel to the oily sludge outlet. A pneumatic butterfly valve is installed at the oily sludge outlet, and an oily sludge tank (No. 1) is located below the oily sludge outlet.

2. The multiple stage seal oil purification system of claim 1, wherein: The primary oily waste treatment device includes a primary filter tank, which contains a stainless steel filter screen. High-level and low-level sensors are mounted on the outer wall of the primary filter tank, and a valve is located at the bottom. Below the primary filter tank is a No. 1 circulating oil tank, and downstream of the No. 1 circulating oil tank is a No. 2 circulating oil tank. High-level and low-level sensors are mounted on the side walls of both the No. 1 and No. 2 circulating oil tanks. The device also includes a No. 1 centrifuge connected to both the No. 1 and No. 2 circulating oil tanks. A scraper is installed inside the No. 1 centrifuge, and a No. 2 sludge tank is located below it. A heater is also installed between the No. 1 centrifuge and the No. 2 circulating oil tank. The secondary oily waste treatment device includes a No. 3 circulating oil tank connected to the No. 2 circulating oil tank, and a No. 4 circulating oil tank downstream of the No. 3 circulating oil tank. High-level and low-level sensors are installed on the side walls of both the No. 3 and No. 4 circulating oil tanks. It also includes a No. 2 centrifuge connected to both the No. 3 and No. 4 circulating oil tanks. A scraper is installed inside the No. 2 centrifuge, and a high-concentration impurity oil collection tank is located below it. The high-concentration impurity oil collection tank is equipped with high-level and low-level sensors and is connected to the primary filter tank via an oil pump and pipeline. A heater is also installed between the No. 2 centrifuge and the No. 4 circulating oil tank. A high-precision filter is installed on the high-concentration impurity oil collection tank and on one side of the No. 2 centrifuge. A differential pressure gauge is installed on the high-precision filter, and its inlet is connected to the No. 4 circulating oil tank via a magnetic suction device and pipeline. Its outlet is connected to the No. 1 storage tank via a valve and pipeline, and to the primary filter tank via another pipeline. The vacuum dehydration treatment device includes a vacuum dehydration unit. The inlet of the vacuum dehydration unit is connected to the No. 1 oil storage tank through a heater and a pipeline, and the outlet is connected to the No. 2 oil storage tank through a pipeline.

3. The multiple stage seal oil purification system of claim 2, wherein: The vacuum dehydration equipment includes a dehydration tank connected to a vacuum pump. A vacuum pressure gauge, an electromagnetic air inlet valve, a pressure safety valve, and a pneumatic ball valve are installed on the upper part of the dehydration tank. A low level gauge, a high level gauge, and a safety level gauge are installed on the side wall of the dehydration tank. A cooler is also provided.

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