Sealing oil purification and fine filtration system

Abstract

This utility model discloses a sealing oil purification and fine filtration system, including a centrifugal filter, a terminal fine filtration device, a precision filter oil pump, a clean oil tank, and pipelines. The terminal fine filtration device includes a fine filter tank, a filter element, and a backwashing structure. The filter element is disposed inside the fine filter tank. Pressure sensors are installed on both the pipelines before and after the fine filter tank to monitor the filtration operation status and achieve backwashing of the filter. The beneficial effects of this utility model are: the centrifugal filter achieves centrifugal filtration and automatic slag scraping of the sealing oil; the terminal fine filtration device is equipped with pressure sensors on both the pipelines before and after the filtration process, and also includes a backwashing structure, which monitors the filtration operation status and achieves backwashing of the filter through pressure sensors. This improves the sealing oil filtration efficiency, increases filtration accuracy, and enhances the quality of the clean oil.

Description

Technical Field

[0001] This utility model relates to the field of waste oil recovery technology, and in particular to a sealing oil purification and fine filtration system. Background Technology

[0002] 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 number of filter cartridges, 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

[0003] The purpose of this utility model is to overcome the above-mentioned technical defects and propose a sealing oil purification and fine filtration system.

[0004] The technical solution adopted by this utility model to achieve its technical objective is: a sealing oil purification and fine filtration system, including a centrifugal filter for centrifugal impurity removal, a dehydration device for removing water from the oil, a terminal fine filtration device for physical filtration, and a backwashing device; the oil inlet end of the centrifugal filter is connected to an oil pipeline, the oil outlet end of the centrifugal filter is connected to the oil inlet end of the dehydration device, the oil outlet end of the dehydration device is connected to the oil inlet end of the fine filtration device, and the backwashing device is connected to the oil outlet end of the terminal fine filtration device, so as to flush backwash liquid into the terminal fine filtration device when the filter element of the terminal fine filtration device is blocked, and backwash the filter element of the terminal fine filtration device.

[0005] Preferably, the backwashing device includes a clean oil tank, a backwashing pump, and an oil delivery pipeline. The oil outlet of the terminal fine filter is connected to the oil inlet of the clean oil tank via an oil outlet pipeline to input the purified oil obtained from the purification process into the clean oil tank for storage. The oil outlet of the terminal fine filter is also connected to the oil outlet of the clean oil tank via an oil inlet pipeline. A backwashing pump is installed on the oil inlet pipeline to backwash the clean oil in the clean oil tank into the terminal fine filter to clean the filter element. The oil outlet of the clean oil tank is also provided with an oil delivery pipeline for externally conveying clean oil.

[0006] Preferably, it also includes a preheating device, which includes a circulation tank and a temperature control heating mechanism that can heat the sludge in the circulation tank to a preset temperature. The oil outlet of the circulation tank is connected to the oil inlet of the centrifugal filter.

[0007] Preferably, the terminal fine filtration device includes a fine filtration tank, which is provided with a backflushing liquid outlet. The backflushing liquid outlet is connected to the oil inlet of the circulation tank through an oil pipeline. A pressure pump is installed on the oil pipeline connecting the backflushing liquid outlet and the oil inlet of the circulation tank to transport the oil that has been flushed from the filter element in the fine filtration tank to the fine filtration tank.

[0008] Preferably, the terminal fine filtration device includes a fine filtration tank and a filter element. The filter element is disposed in the fine filtration tank. Pressure sensors are respectively installed on the oil inlet pipe and the oil outlet pipe of the fine filtration tank to detect the pressure difference between the two. When the pressure difference is greater than a preset value, the backwashing device is activated to clean the filter element.

[0009] Preferably, the filter element is a stainless steel filter element.

[0010] Preferably, the centrifugal filter includes a centrifugal mechanism and an automatic slag discharge mechanism;

[0011] The centrifugation mechanism includes a centrifuge base, a drum below the centrifuge base, a drum bearing chamber above the drum base, a drum shaft fitted inside the drum bearing chamber, the lower end of the drum shaft connected to the drum, the upper end extending upward and out of the drum bearing chamber, a drum synchronous pulley fitted at the top of the drum bearing chamber, a support frame outside the drum bearing chamber, a drum servo motor mounted on the support frame, a drum servo motor synchronous pulley mounted on the output shaft of the drum servo motor, and the drum synchronous pulley connected to the drum servo motor synchronous pulley via a belt.

[0012] The automatic slag discharge mechanism includes a slag discharge reduction motor, which is equipped with a drive shaft. The upper end of the drive shaft is equipped with an opening and closing cylinder, and the lower end is equipped with an upper shift fork. The drum shaft is hollow and has a high-speed bearing inside. A scraper shaft is equipped inside the high-speed bearing. The upper end of the scraper shaft is equipped with the upper shift fork via a lower shift fork, and the lower end extends into the drum. A rotating scraper is provided inside the drum and at the lower end of the scraper shaft.

[0013] A locking cylinder is also provided on the centrifuge base and on one side of the drum bearing chamber. The piston rod of the locking cylinder is provided with a locking pin at its end, and the top of the drum is provided with a pin hole. The locking pin can be inserted into the pin hole to lock the drum.

[0014] Preferably, an intermediate tank for storing the preliminarily purified oil obtained from centrifugal treatment is also installed between the centrifugal filter and the dehydration device. The oil inlet and oil outlet of the intermediate tank are respectively connected to the oil outlet of the centrifugal filter and the oil inlet of the dehydration device. A dehydration oil supply pump is installed on the oil pipeline connecting the intermediate tank and the dehydration device.

[0015] Preferably, the dehydration device is a flash dehydration device, which includes a dehydration tank and a precision filter oil pump installed on the oil delivery pipeline connecting the oil outlet of the dehydration tank and the oil inlet of the final fine filter device.

[0016] The preferred temperature-controlled heating mechanism includes a heater and a temperature sensor.

[0017] The beneficial effects of this invention are: the centrifugal filter achieves centrifugal filtration and automatic slag scraping of sealing oil; pressure sensors are installed on both the pipelines before and after the final fine filtration device; and a backwashing structure is also provided. The pressure sensors monitor the filtration operation status and enable backwashing of the filter. This improves the sealing oil filtration efficiency, increases filtration accuracy, and enhances the quality of the purified oil. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the working principle of this utility model;

[0019] Figure 2 This is a schematic diagram of a centrifugal filter.

[0020] Figure 3 This is a schematic diagram of the filter element structure.

[0021] The diagram is marked as follows:

[0022] 1. Centrifugal filter; 2. Terminal fine filtration device; 3. Precision filter oil pump; 4. Clean oil tank; 5. Piping;

[0023] 21. Fine filter tank; 22. Filter element; 23. Backwashing structure; 24. Pressure sensor; 231. Backwashing pump;

[0024] 11. Centrifuge mechanism; 111. Centrifuge base; 112. Rotary drum; 113. Rotary drum bearing housing; 114. Rotary drum shaft;

[0025] 115. Drum synchronizer pulley; 116. Support frame; 117. Drum servo motor; 118. Drum servo motor synchronizer pulley;

[0026] 119. Belt; 12. Automatic slag discharge mechanism; 121. Slag discharge geared motor; 122. Drive shaft; 123. Opening and closing cylinder;

[0027] 124. Upper shift fork; 125. High-speed bearing; 126. Scraper shaft; 127. Lower shift fork; 128. Rotary scraper;

[0028] 129. Locking cylinder; 130. Locking pin; 131. Pin hole. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] like Figure 1-2As shown: A sealing oil purification and fine filtration system includes a centrifugal filter 1, a terminal fine filtration device 2, a precision filter oil pump 3, a clean oil tank 4, and pipelines 5. The terminal fine filtration device 2 includes a fine filtration tank 21, a filter element 22, and a backwashing structure 23. The filter element 22 is a stainless steel filter element and is installed inside the fine filtration tank 21. Pressure sensors 24 are installed on both the pipelines before and after the fine filtration tank 21 to monitor the filtration operation status and realize the backwashing of the filter.

[0032] After centrifugation and dehydration, the oil is transported to the inlet of the fine filter tank 21 by the precision filter oil pump 3. Under the conveying pressure, impurities are intercepted by the filter element 22 of the fine filter tank 21 and passed through the filter element 22. The oil is then transported from the outlet of the fine filter tank 21 to the clean oil tank 4 for reuse.

[0033] The backwashing structure 23 also includes a backwashing pump 231, which is connected to the clean oil tank 4 and the fine filter tank 21 via pipelines.

[0034] The centrifugal filter 1 includes a centrifugal mechanism 11 and an automatic slag discharge mechanism 12.

[0035] The centrifuge mechanism 11 includes a centrifuge base 111, a drum 112 is provided below the centrifuge base 111, and a drum bearing chamber 113 is provided above the drum base 111. A drum shaft 114 is fitted inside the drum bearing chamber 113. The lower end of the drum shaft 114 is connected to the drum 112, and the upper end extends upward and out of the drum bearing chamber 113. A drum synchronous pulley 115 is fitted at the top of the drum bearing chamber 113. A support frame 116 is provided outside the drum bearing chamber 113. A drum servo motor 117 is provided on the support frame 116. A drum servo motor synchronous pulley 118 is provided on the output shaft of the drum servo motor 117. The drum synchronous pulley 115 and the drum servo motor synchronous pulley 118 are connected by a belt 119.

[0036] The automatic slag discharge mechanism 12 includes a slag discharge reduction motor 121, which is equipped with a transmission shaft 122. The upper end of the transmission shaft 122 is equipped with an opening and closing cylinder 123, and the lower end is provided with an upper shift fork 124. The drum shaft 112 is hollow and has a high-speed bearing 125 inside. A scraper shaft 126 is equipped inside the high-speed bearing 125. The upper end of the scraper shaft 126 is equipped with the upper shift fork 124 through a lower shift fork 127, and the lower end extends into the drum 112. A rotating scraper 128 is provided inside the drum 112 and at the lower end of the scraper shaft 126.

[0037] On the centrifuge base 111, on one side of the drum bearing chamber 113, a locking cylinder 129 is also provided. The piston rod of the locking cylinder 129 is provided with a locking pin 130 at its end. The top of the drum 112 is provided with a pin hole 131. The locking pin 130 can be inserted into the pin hole 131 to lock the drum 112.

[0038] The working principle and process of this utility model are as follows:

[0039] After centrifugation and dehydration, the oil is transported to the inlet of the fine filter tank 21 by the precision filter oil pump 3. Under the conveying pressure, impurities are effectively intercepted on the surface of the filter element 22 of the fine filter tank 21. The oil passing through the filter element 22 is then transported from the outlet of the fine filter tank 21 to the clean oil tank 4 for reuse.

[0040] The centrifugal filter 1 includes a centrifugal mechanism 11 and an automatic slag discharge mechanism 12. Under the control of the control system, it periodically discharges slag to ensure the filtration effect. Specifically, the slag discharge reduction motor 121 provides power, which drives the rotating scraper 128 to rotate through the transmission shaft 122; the locking cylinder 129 drives the locking pin 130 to move linearly. When the locking pin 130 extends, it inserts into the pin hole 131 and locks the rotating drum 112, preventing the rotating drum 112 from moving with the rotating scraper 128.

[0041] When centrifugation is in progress, the locking cylinder 129 opens, and the rotating scraper 128 rotates with the drum 112, allowing purified oil to seep out of the drum 112, while solid impurities adhere to the inner wall of the drum 112. When centrifugation is finished, the locking cylinder 129 locks, and only the rotating scraper 128 rotates, scraping off the solid impurities adhering to the inner wall of the drum 112.

[0042] Pressure sensors 24 are installed on both the pipelines before and after the final fine filtration unit to monitor the filtration operation status and realize the backwashing of the filter. When the pressure difference exceeds the set value, the backwash pump 231 delivers clean oil from the clean oil tank 4 to backwash the filter element 22, removing impurities from the surface of the filter element 22. After backwashing, the oil is transported to the upstream raw material oil circulation tank for further processing via the oil pump and pipeline. Backwashing stops when the pressure difference is lower than the set pressure.

Claims

1. A sealed oil purification polishing system, characterized by: The device includes a centrifugal filter for centrifugal impurity removal, a dehydration device for removing water from oil, a terminal fine filter for physical filtration, and a backwashing device. The oil inlet of the centrifugal filter is connected to an oil pipeline, the oil outlet of the centrifugal filter is connected to the oil inlet of the dehydration device, the oil outlet of the dehydration device is connected to the oil inlet of the fine filter, and the backwashing device is connected to the oil outlet of the terminal fine filter to flush backwash liquid into the terminal fine filter when the filter element of the terminal fine filter is blocked, thereby backwashing and cleaning the filter element of the terminal fine filter.

2. The sealed oil purification polishing filter system of claim 1, wherein, The backwashing device includes a clean oil tank, a backwashing pump, and an oil delivery pipeline. The oil outlet of the terminal fine filter is connected to the oil inlet of the clean oil tank via an oil outlet pipeline to input the purified oil obtained from the purification process into the clean oil tank for storage. The oil outlet of the terminal fine filter is also connected to the oil outlet of the clean oil tank via an oil inlet pipeline. A backwashing pump is installed on the oil inlet pipeline to backwash the clean oil in the clean oil tank into the terminal fine filter to clean the filter element. The oil outlet of the clean oil tank is also provided with an oil delivery pipeline for externally conveying clean oil.

3. The sealed oil purification polishing filter system of claim 2, wherein: It also includes a preheating device, which includes a circulation tank and a temperature control heating mechanism that can heat the sludge in the circulation tank to a preset temperature. The oil outlet of the circulation tank is connected to the oil inlet of the centrifugal filter.

4. The sealing oil purification and fine filtration system according to claim 3, characterized in that, The terminal fine filtration device includes a fine filtration tank, which is provided with a backflushing liquid outlet. The backflushing liquid outlet is connected to the oil inlet of the circulation tank through an oil pipeline. A pressure pump is installed on the oil pipeline connecting the backflushing liquid outlet and the oil inlet of the circulation tank to transport the oil that has been flushed from the filter element in the fine filtration tank to the fine filtration tank.

5. The sealing oil purification and fine filtration system according to claim 1, characterized in that, The terminal fine filtration device includes a fine filtration tank and a filter element. The filter element is installed inside the fine filtration tank. Pressure sensors are installed on the oil inlet pipe and the oil outlet pipe of the fine filtration tank to detect the pressure difference between them. When the pressure difference is greater than a preset value, the backwashing device is activated to clean the filter element.

6. The sealing oil purification and fine filtration system according to claim 5, characterized in that: The filter element is a stainless steel filter element.

7. The sealing oil purification and fine filtration system according to claim 1, characterized in that: The centrifugal filter includes a centrifugal mechanism and an automatic slag discharge mechanism; The centrifugation mechanism includes a centrifuge base, a drum below the centrifuge base, a drum bearing chamber above the drum base, a drum shaft fitted inside the drum bearing chamber, the lower end of the drum shaft connected to the drum, the upper end extending upward and out of the drum bearing chamber, a drum synchronous pulley fitted at the top of the drum bearing chamber, a support frame outside the drum bearing chamber, a drum servo motor mounted on the support frame, a drum servo motor synchronous pulley mounted on the output shaft of the drum servo motor, and the drum synchronous pulley connected to the drum servo motor synchronous pulley via a belt. The automatic slag discharge mechanism includes a slag discharge reduction motor, which is equipped with a drive shaft. The upper end of the drive shaft is equipped with an opening and closing cylinder, and the lower end is equipped with an upper shift fork. The drum shaft is hollow and has a high-speed bearing inside. A scraper shaft is equipped inside the high-speed bearing. The upper end of the scraper shaft is equipped with the upper shift fork via a lower shift fork, and the lower end extends into the drum. A rotating scraper is provided inside the drum and at the lower end of the scraper shaft. A locking cylinder is also provided on the centrifuge base and on one side of the drum bearing chamber. The piston rod of the locking cylinder is provided with a locking pin at its end, and the top of the drum is provided with a pin hole. The locking pin can be inserted into the pin hole to lock the drum.

8. The sealing oil purification and fine filtration system according to claim 1, characterized in that: An intermediate tank for storing the preliminarily purified oil obtained from centrifugal processing is also installed between the centrifugal filter and the dehydration device. The oil inlet and outlet of the intermediate tank are respectively connected to the oil outlet of the centrifugal filter and the oil inlet of the dehydration device. A dehydration oil supply pump is installed on the oil pipeline connecting the intermediate tank and the dehydration device.

9. The sealing oil purification and fine filtration system according to claim 1, characterized in that: The dehydration device is a flash dehydration device, which includes a dehydration tank and a precision filter oil pump installed on the oil delivery pipeline connecting the oil outlet of the dehydration tank and the oil inlet of the final fine filter device.

10. The sealing oil purification and fine filtration system according to claim 2, characterized in that: The temperature-controlled heating mechanism includes a heater and a temperature sensor.

Images