A waste engine oil filter harmless storage device and a storage method

Abstract

The application discloses a harmless storage device and method for waste engine oil filter, which can fully clean the inside and outside of the filter in a full-process closed environment, recycle and treat the waste water generated in the cleaning, collect and adsorb the oil gas volatilized in the storage process of the filter, and further guarantee the harmless treatment and storage of the filter.

Description

Technical Field

[0001] This invention belongs to the technical field of waste oil filter treatment, and relates to a harmless storage device and storage method for waste oil filters. Background Technology

[0002] Engine oil participates in engine operation, serving to lubricate and cool the engine. During prolonged engine operation, the oil circulates and accumulates a large amount of impurities, including metal shavings from friction, dust, and carbon particles produced during gasoline combustion. These impurities, combined with the oil's oxidation process, cause it to thicken into a viscous, gel-like substance over time. To prevent these impurities from adversely affecting the engine, an oil filter is installed in the oil circulation path to remove these deposits. However, after prolonged use, the filter's filtering efficiency decreases, and a large amount of impurities accumulates inside, necessitating its removal and replacement.

[0003] Discarded air filters are classified as HW49 hazardous waste. Improper disposal or improper stockpiling can cause serious environmental pollution. Therefore, dismantled and discarded air filters require safe and harmless treatment.

[0004] In existing technologies, it is difficult to guarantee the airtightness of the filter processing procedure, and many existing technologies involve disassembling and crushing the filter structure. This can cause easily volatile dust and oil fumes in the filter to quickly escape into the external environment and cause pollution. At the same time, the waste liquid generated during the filter cleaning process in existing technologies also pollutes the environment.

[0005] Therefore, in view of the shortcomings of the existing technology in the process of treating the filter, such as not suppressing the volatilization of dust and oil and not treating the waste liquid in a harmless manner, the present invention discloses a harmless storage device and storage method for waste oil filter. Summary of the Invention

[0006] The purpose of this invention is to provide a harmless storage device and method for waste oil filters, which can thoroughly clean the inside and outside of the filter in a fully enclosed environment, recycle the wastewater generated during cleaning, and collect and adsorb the oil vapors volatilized during the storage of the filter, thereby ensuring that the filter is stored in a harmless manner.

[0007] This invention is achieved through the following technical solution:

[0008] A waste oil filter harmless storage device includes a cleaning section, a solid-liquid separation and recovery section, and a storage section. The cleaning section includes a water bath ultrasonic cleaning section and a liquid injection cleaning section. The liquid injection cleaning section includes a guide roller frame for placing the filter. A plurality of liquid injection trays are provided on one side of the guide roller frame. Each liquid injection tray has a liquid injection nozzle that connects to the oil inlet of the filter, and a liquid outlet nozzle that connects to the oil outlet of the filter. A plurality of contact positioning parts are provided on the other side of the guide roller frame. The part can move toward the filter and open the overflow valve in the oil outlet of the filter by contact; the injection nozzle is connected to the liquid supply station, the outlet nozzle is connected to the solid-liquid separation and recovery part, and the solid-liquid separation and recovery part is connected to the liquid supply station; the water bath ultrasonic cleaning part is used to clean the outside of the filter with water bath ultrasonic cleaning, one end of the water bath ultrasonic cleaning part is connected to the storage part through an openable gate, the water inlet of the water bath ultrasonic cleaning part is connected to the liquid supply station, and the water outlet of the water bath ultrasonic cleaning part is connected to the solid-liquid separation and recovery part.

[0009] To better realize the present invention, the abutting positioning part further includes an abutting disc, a driving hydraulic cylinder, and an abutting pin. The driving hydraulic cylinder is provided at the end of the abutting disc away from the filter, and the abutting pin is coaxially provided at the end of the abutting disc close to the filter, corresponding to the oil outlet of the filter.

[0010] To better realize the present invention, an annular seal is further provided on the end of the contact disc near the filter, around the contact pin.

[0011] To better realize the present invention, the water bath ultrasonic cleaning unit further includes a water bath tank for holding the filter, the bottom of the water bath tank is provided with a water inlet, and the interior of the water bath tank is provided with an ultrasonic generator and a heater; a gate is provided on one side of the water bath tank, and the gate is connected to the storage unit.

[0012] To better realize the present invention, the solid-liquid separation and recovery unit further includes a recovery tank, inside which a hydrocyclone and a centrifuge are arranged. The inlet of the hydrocyclone is connected to the liquid outlet and the drain of the water bath ultrasonic cleaning unit, respectively. The first outlet of the hydrocyclone is connected to the centrifuge, the second outlet of the hydrocyclone is connected to the inside of the recovery tank, the liquid outlet of the centrifuge is connected to the liquid supply station, and the solid outlet of the centrifuge is connected to the inside of the recovery tank.

[0013] To better realize the present invention, the storage unit further includes a storage box, which is connected to the water bath ultrasonic cleaning unit through a gate. An air supply device is provided at the bottom of the storage box, and an air collecting hood is provided at the top of the storage box. The air collecting hood is connected to the oil and gas adsorption filter cartridge through a pipeline.

[0014] To better realize the present invention, the storage box is further provided with a storage roller frame inside, and one end of the storage roller frame is provided corresponding to the guide roller frame.

[0015] A method for the harmless storage of waste oil filters, based on a waste oil filter harmless storage device, includes the following steps:

[0016] Step 1: Open the water bath, then place the filters to be cleaned on the guide rollers, and connect the oil inlet of the filter to the liquid injection nozzle and the oil outlet of the filter to the liquid outlet nozzle.

[0017] Step 1: Move the contact positioning part toward the filter until the contact positioning part opens the overflow valve in the oil outlet of the filter, and then close the water bath.

[0018] Step 3: Inject cleaning fluid into the water bath tank, use an ultrasonic generator to clean the outside of the filter and apply vibration to the filter, and the cleaning fluid flows into the solid-liquid separation and recovery section; inject cleaning fluid into the oil inlet of the filter through the injection nozzle, and the cleaning fluid flows through the oil inlet, filter paper, and open overflow valve to the oil outlet, and then flows into the solid-liquid separation and recovery section through the oil outlet.

[0019] Step 4: The oil-containing cleaning solution is separated into solid and liquid components by the solid-liquid separation and recovery unit. The separated cleaning solution is then transported to the liquid supply station, where the separated oil is retained. The liquid supply station then sends the cleaning solution to the injection nozzle and water bath to achieve filter circulation cleaning.

[0020] Step 5: Drain the water bath tank, open the gate, and the contact positioning part disengages from the filter, allowing the filter to roll down the guide roller to the storage section.

[0021] Step 6: Turn on the air supply device to dry the filter, collect the volatile oil and gas through the air collection hood, and transport the oil and gas through the pipeline to the oil and gas adsorption filter cartridge for adsorption and collection.

[0022] To better realize the present invention, the injection nozzle begins to inject cleaning fluid until the filter is full of cleaning fluid. Then the outlet nozzle is closed, and then the ultrasonic generator applies ultrasonic waves to make the cleaning fluid outside the filter resonate with the cleaning fluid inside the filter. After the resonance is maintained for a calibrated time, the outlet nozzle is opened to cooperate with the injection nozzle to circulate the cleaning fluid inside the filter.

[0023] To better realize the present invention, the time for circulating the cleaning fluid is longer than the calibration time for maintaining resonance.

[0024] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0025] (1) The present invention uses a water ultrasonic cleaning unit to perform water bath ultrasonic cleaning on the outside of the filter, and at the same time, the ultrasonic waves cause the internal vibration of the filter to loosen the oil, sludge and other substances inside the filter. Combined with the liquid injection cleaning unit, the internal of the filter is cleaned by liquid injection, thereby ensuring the cleaning effect of the filter.

[0026] (2) The present invention uses a solid-liquid separation and recovery unit to separate the wastewater generated during cleaning, and recycles the separated cleaning liquid to reduce resource consumption. The separated solid impurities are sealed and stored to avoid polluting the external environment.

[0027] (3) The present invention seals and stores the cleaned filter in the storage section, and sends air to the filter through the air supply device during the storage process, so that the filter dries quickly and the residual oil and gas on the filter evaporates rapidly. The evaporated oil and gas is collected by the air collection hood and the collected oil and gas is adsorbed by the oil and gas adsorption filter cartridge, which further avoids the harmful oil and gas volatilization from polluting the environment. Attached Figure Description

[0028] Figure 1 A schematic diagram of a waste oil filter harmless storage device;

[0029] Figure 2 A schematic diagram showing that the filter is not being engaged by the positioning part;

[0030] Figure 3 A schematic diagram showing the filter being pressed against by the contact positioning part;

[0031] Figure 4 A flowchart illustrating the method for the harmless storage of waste oil filters.

[0032] Wherein: 1-Guide roller; 2-Injection tray; 3-Abutment positioning part; 4-Hydrocyclone; 5-Centrifuge; 6-Air supply device; 7-Oil and gas adsorption filter cartridge; 8-Storage roller; 9-Supply station; 21-Injection nozzle; 22-Outlet nozzle; 23-Ultrasonic generator; 24-Heater; 31-Abutment tray; 32-Drive hydraulic cylinder; 33-Abutment impact pin; 100-Water bath ultrasonic cleaning part; 200-Solid-liquid separation and recovery part; 300-Storage part. Detailed Implementation

[0033] The following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is intended to include the plural form as well. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] For ease of description, the words "up," "down," "left," and "right" appearing in this invention only indicate that they are consistent with the up, down, left, and right directions of the accompanying drawings themselves, and do not limit the structure. They are merely for the purpose of facilitating the description of this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] Terminology Explanation: The terms "installation," "connection," "linking," and "fixing" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] Example 1:

[0038] This embodiment relates to a waste oil filter harmless storage device, such as... Figures 1-3 As shown, the system includes a cleaning unit 100, a solid-liquid separation and recovery unit 200, and a storage unit 300. The cleaning unit 100 includes a water bath ultrasonic cleaning unit and a liquid injection cleaning unit. The liquid injection cleaning unit includes a guide roller frame 1 for placing the filter. A plurality of liquid injection trays 2 are provided on one side of the guide roller frame 1. Each liquid injection tray 2 has a liquid injection nozzle 21 that connects to the oil inlet of the filter, and a liquid outlet nozzle 22 that connects to the oil outlet of the filter. A plurality of contact positioning parts 3 are provided on the other side of the guide roller frame 1. The contact positioning parts 3 can... The filter is moved towards the oil outlet and the overflow valve in the oil outlet of the filter is opened by contact; the injection nozzle 21 is connected to the liquid supply station 9, the outlet nozzle 22 is connected to the solid-liquid separation and recovery unit 200, and the solid-liquid separation and recovery unit 200 is connected to the liquid supply station 9; the water bath ultrasonic cleaning unit is used to clean the exterior of the filter with water bath ultrasonic cleaning, one end of the water bath ultrasonic cleaning unit is connected to the storage unit 300 through an openable gate, the water inlet of the water bath ultrasonic cleaning unit is connected to the liquid supply station 9, and the drain of the water bath ultrasonic cleaning unit is connected to the solid-liquid separation and recovery unit 200.

[0039] The cleaning unit 100 includes a cleaning chamber, which provides a sealed environment for cleaning the filter. Inside the cleaning chamber are a water bath ultrasonic cleaning unit and a liquid injection cleaning unit. The water bath ultrasonic cleaning unit immerses the filter in water and applies ultrasonic vibrations to the filter to clean its exterior. Simultaneously, the ultrasonic vibrations cause the cleaning fluid inside the filter to resonate, ensuring that oil, dust, and tar inside the filter can be removed from the filter paper, allowing the cleaning fluid inside the filter to more effectively clean its interior. The filter to be cleaned is placed on the guide roller 1 inside the cleaning chamber, and the injection nozzle 21 on the liquid injection tray 2 is aligned with the oil inlet of the filter, and the outlet nozzle 22 on the liquid injection tray 2 is aligned with the oil outlet of the filter. The contact positioning part 3 presses against the other end of the filter, clamping and positioning the filter in conjunction with the liquid injection tray 2. Simultaneously, the contact end of the contact positioning part 3 opens the overflow valve in the oil outlet of the filter.

[0040] The supply station 9 delivers high-pressure cleaning fluid to the injection nozzle 21. The cleaning fluid enters the filter through the oil inlet and passes through the filter paper and filter element inside the filter. It then flows out of the filter through the oil outlet via the open overflow valve and flows through the outlet nozzle 22 to the solid-liquid separation and recovery unit 200. Combined with the vibration applied to the filter by the water bath ultrasonic cleaning unit, oil, colloids, dust, and other contaminants adhering to the filter paper and filter element inside the filter can be effectively removed. The waste liquid after washing flows through the outlet nozzle 22 to the solid-liquid separation and recovery unit 200 for solid-liquid separation. The oil, colloids, dust, and other contaminants in the waste liquid are separated and retained in the solid-liquid separation and recovery unit 200, while the separated cleaning fluid flows back to the supply station 9 to participate in the next cleaning cycle, improving the utilization rate of the cleaning fluid.

[0041] After the filter is cleaned, the ultrasonic cleaning unit 100 drains water, the contact positioning unit 3 releases its contact and pressure on the filter, the gate between the ultrasonic cleaning unit and the storage unit 300 opens, and the filter rolls down along the guide roller 1 into the storage unit 300 for storage in a relatively enclosed space.

[0042] Throughout the entire cleaning and storage process of the filter, the cleaning section 100, the solid-liquid separation and recovery section 200, and the storage section 300 are kept in a relatively closed environment to prevent pollutants inside the filter, cleaning wastewater, and polluting oil and gas volatilized during the filter storage process from leaking into the external environment.

[0043] Example 2:

[0044] This embodiment relates to a waste oil filter harmless storage device, such as... Figure 2 and Figure 3As shown, an improvement is made based on Embodiment 1. The contact positioning part 3 includes a contact plate 31, a driving hydraulic cylinder 32, and a contact pin 33. The driving hydraulic cylinder 32 is provided at the end of the contact plate 31 away from the filter, and the contact pin 33 is coaxially provided at the end of the contact plate 31 close to the filter, corresponding to the oil outlet of the filter.

[0045] After the filter is connected to the liquid injection plate 2, the hydraulic cylinder 32 drives the contact plate 31 to move toward the filter, so that the contact pin 33 at one end of the contact plate 31 pierces the metal shell at one end of the filter and extends into the filter element of the filter until the contact pin 33 contacts the overflow valve at the filter element and opens the overflow valve, so that the overflow valve remains in the normally open state. While realizing the contact positioning of the filter, the normally open overflow valve ensures that the cleaning fluid inside the filter can circulate smoothly.

[0046] Furthermore, an annular seal is provided around the abutment pin 33 on the end of the contact plate 31 near the filter. When the abutment pin 33 contacts the overflow valve, the annular seal fits tightly against the end face of the filter to form a sealing structure, preventing a large amount of cleaning fluid from leaking out of the filter during the cleaning process, thereby ensuring that there is enough cleaning fluid inside the filter for circulating cleaning operations.

[0047] The other parts of this embodiment are the same as those in Embodiment 1, so they will not be described again.

[0048] Example 3:

[0049] This embodiment relates to a waste oil filter harmless storage device, which is an improvement on embodiment 1 or 2, such as... Figure 1 As shown, the water bath ultrasonic cleaning unit includes a water bath tank for holding the filter. The bottom of the water bath tank is provided with a water inlet. An ultrasonic generator 23 and a heater 24 are provided inside the water bath tank. A gate is provided on one side of the water bath tank, and the gate is connected to the storage unit 300.

[0050] The bottom of the water bath chamber is equipped with a water inlet and a drain outlet. The water inlet is connected to the liquid supply station 9 via a pipeline, and the drain outlet is connected to the solid-liquid separation and recovery unit 200 via a pipeline. The top of the water bath chamber is equipped with an openable and closable cover. A multi-stage labyrinth sealing structure is installed between the cover and the water bath chamber to form a sealed cleaning chamber when the cover is closed. Several sets of ultrasonic generators 23 are installed on the inner wall of the water bath chamber. After the water bath chamber is filled with cleaning fluid, the ultrasonic generators 23 apply vibration to the cleaning fluid, cleaning the exterior of the filter while simultaneously causing the cleaning fluid inside the filter to resonate, improving the cleaning effect inside the filter. At the same time, the heater 24 heats the cleaning fluid in the water bath chamber, maintaining the temperature of the cleaning fluid at a level conducive to softening the oil and viscous residue inside the filter, ensuring that the cleaning fluid inside the filter can more quickly and effectively wash away the oil and viscous residue.

[0051] The other parts of this embodiment are the same as those in Embodiment 1 or 2, so they will not be described again.

[0052] Example 4:

[0053] This embodiment relates to a waste oil filter harmless storage device, which is an improvement on any one of embodiments 1-3, such as... Figure 1 As shown, the solid-liquid separation and recovery unit 200 includes a recovery tank. Inside the recovery tank, a hydrocyclone 4 and a centrifuge 5 are installed. The inlet of the hydrocyclone 4 is connected to the liquid outlet 22 and the drain end of the water bath ultrasonic cleaning unit, respectively. The first outlet of the hydrocyclone 4 is connected to the centrifuge 5, and the second outlet of the hydrocyclone 4 is connected to the inside of the recovery tank. The liquid outlet of the centrifuge 5 is connected to the liquid supply station 9, and the solid outlet of the centrifuge 5 is connected to the inside of the recovery tank.

[0054] The cleaning wastewater from the outlet 22 and the water bath first enters the hydrocyclone 4 for swirling. The swirling action of the hydrocyclone 4 classifies the impurities in the cleaning wastewater. Larger metal shavings, solid particles, and colloidal particles in the cleaning wastewater are discharged into the recovery tank through the second outlet of the hydrocyclone. The remaining cleaning wastewater enters the centrifuge 5 through the first outlet for further centrifugal separation. The centrifugal force provided by the centrifuge 5 further separates the cleaning liquid from the impurities in the cleaning wastewater. The cleaning liquid is transported to the liquid supply station 9 through the liquid outlet to participate in the subsequent cleaning cycle, while the impurities are discharged into the recovery tank through the solid outlet for temporary storage.

[0055] The other parts of this embodiment are the same as any one of embodiments 1-3, so they will not be described again.

[0056] Example 5:

[0057] This embodiment relates to a waste oil filter harmless storage device, which is an improvement on any one of embodiments 1-4, such as... Figure 1 As shown, the storage unit 300 includes a storage box, which is connected to the water bath ultrasonic cleaning unit through a gate. An air supply device 6 is provided at the bottom of the storage box, and an air collecting hood is provided at the top of the storage box. The air collecting hood is connected to the oil and gas adsorption filter cartridge 7 through a pipeline.

[0058] After the gate is opened, the cleaned filter rolls into the storage tank. Then the gate is closed, and the air supply device 6 supplies air from bottom to top to dry the filter. During the drying process, the volatile polluting oil and gas is transported to the air collection hood for collection. The air collection hood gathers the polluting oil and gas into the oil and gas adsorption filter cartridge 7. The oil and gas are adsorbed by the oil and gas adsorption layer inside the oil and gas adsorption filter cartridge 7, preventing the volatile oil and gas from being discharged into the external environment.

[0059] Furthermore, a storage roller rack 8 is provided inside the storage box, with one end of the storage roller rack 8 corresponding to the guide roller rack 1. After the gate is opened, the filter rolls from the guide roller rack 1 onto the storage roller rack 8, and the storage roller rack 8 stores the filter inside the storage box.

[0060] Furthermore, a door that can be opened and closed is provided on one side of the storage box, and a sealing element is provided between the door and the storage box to ensure the airtightness when the door is closed.

[0061] The other parts of this embodiment are the same as any one of embodiments 1-4, so they will not be described again.

[0062] Example 6:

[0063] A method for the harmless storage of waste oil filters is implemented based on the waste oil filter harmless storage device described in any one of Examples 1-5, such as... Figure 4 As shown, it includes the following steps:

[0064] Step 1: Open the water bath, then place the filters to be cleaned on the guide roller 1, and connect the oil inlet of the filter to the liquid injection nozzle 21 and the oil outlet of the filter to the liquid outlet nozzle 22.

[0065] Step 2: Move the contact positioning part 3 toward the filter until the contact positioning part 3 opens the overflow valve in the oil outlet of the filter, and then close the water bath.

[0066] Step 3: Inject cleaning fluid into the water bath tank, use ultrasonic generator 23 to clean the outside of the filter and apply vibration to the filter, and the cleaning fluid flows into the solid-liquid separation and recovery section 200; inject cleaning fluid into the oil inlet of the filter through injection nozzle 21, and the cleaning fluid flows through the oil inlet, filter paper, and open overflow valve to the oil outlet, and flows into the solid-liquid separation and recovery section 200 through the oil outlet;

[0067] Step 4: The oil-containing cleaning fluid is separated into solid and liquid components by the solid-liquid separation and recovery unit 200, and the separated cleaning fluid is transported to the liquid supply station 9 to retain the separated oil. The liquid supply station 9 will send the cleaning fluid to the injection nozzle 21 and the water bath to achieve filter circulation cleaning.

[0068] Step 5: The water bath tank drains water, the gate opens, the contact positioning part 3 disengages from the filter, and the filter rolls down along the guide roller 1 to the storage part 300.

[0069] Step 6: The air supply device 6 is turned on to dry the filter. The volatile oil and gas are collected by the air collection hood and transported to the oil and gas adsorption filter cartridge 7 through the pipeline for adsorption and collection.

[0070] Furthermore, in step 3, the injection nozzle 21 begins injecting cleaning fluid until the filter is full. Then, the outlet nozzle 22 closes, and the ultrasonic generator 23 applies ultrasonic waves, causing the cleaning fluid outside and inside the filter to resonate. This resonance is maintained for a calibrated time, after which the outlet nozzle 22 opens to circulate the cleaning fluid inside the filter in conjunction with the injection nozzle 21. This calibrated resonance between the cleaning fluid inside and outside the filter ensures that oil, grease, and other contaminants inside the filter are loosened and removed. This ensures that the cleaning fluid can more quickly and effectively clean the inside of the filter during subsequent cleaning cycles, thus guaranteeing a good cleaning effect.

[0071] Furthermore, the time for circulating the cleaning fluid is greater than the calibration time for maintaining resonance. Preferably, the calibration time for maintaining resonance is greater than or equal to 20 seconds, and the time for circulating the cleaning fluid is greater than or equal to 30 seconds.

[0072] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A waste oil filter harmless storage device, comprising a cleaning unit (100), a solid-liquid separation and recovery unit (200), and a storage unit (300), characterized in that, The cleaning unit (100) includes a water bath ultrasonic cleaning unit and a liquid injection cleaning unit. The liquid injection cleaning unit includes a guide roller (1) for placing the filter. A plurality of liquid injection trays (2) are provided on one side of the guide roller (1). The liquid injection trays (2) are provided with liquid injection nozzles (21) that connect with the oil inlet on the filter. The liquid injection trays (2) are provided with liquid outlet nozzles (22) that connect with the oil outlet on the filter. A plurality of contact positioning parts (3) are provided on the other side of the guide roller (1). The contact positioning parts (3) can move toward the filter and contact open the overflow valve in the oil outlet of the filter. The liquid injection nozzles (21) are connected to the liquid supply station (9), and the liquid outlet nozzles (22) are connected to the solid-liquid separation and recovery unit (200). The solid-liquid separation and recovery unit (200) is connected to the liquid supply station (9); the water bath ultrasonic cleaning unit is used for water bath ultrasonic cleaning of the outside of the filter. One end of the water bath ultrasonic cleaning unit is connected to the storage unit (300) through an openable gate. The water inlet of the water bath ultrasonic cleaning unit is connected to the liquid supply station (9), and the drain of the water bath ultrasonic cleaning unit is connected to the solid-liquid separation and recovery unit (200); the contact positioning unit (3) includes a contact plate (31), a driving hydraulic cylinder (32), and a contact pin (33). The driving hydraulic cylinder (32) is provided at the end of the contact plate (31) away from the filter, and the contact pin (33) is coaxially provided at the end of the contact plate (31) close to the filter, corresponding to the oil outlet of the filter.

2. The waste oil filter harmless storage device according to claim 1, characterized in that, An annular seal is provided around the abutment pin (33) on one end of the abutment disc (31) near the filter.

3. A waste oil filter harmless storage device according to claim 1 or 2, characterized in that, The water bath ultrasonic cleaning unit includes a water bath tank for holding the filter. The bottom of the water bath tank is provided with a water inlet. An ultrasonic generator (23) and a heater (24) are provided inside the water bath tank. A gate is provided on one side of the water bath tank, and the gate is connected to the storage unit (300).

4. A waste oil filter harmless storage device according to claim 1 or 2, characterized in that, The solid-liquid separation and recovery unit (200) includes a recovery tank. Inside the recovery tank, there is a hydrocyclone (4) and a centrifuge (5). The inlet of the hydrocyclone (4) is connected to the outlet nozzle (22) and the drain end of the water bath ultrasonic cleaning unit, respectively. The first outlet of the hydrocyclone (4) is connected to the centrifuge (5). The second outlet of the hydrocyclone (4) is connected to the inside of the recovery tank. The liquid outlet of the centrifuge (5) is connected to the liquid supply station (9). The solid outlet of the centrifuge (5) is connected to the inside of the recovery tank.

5. The waste oil filter harmless storage device according to claim 3, characterized in that, The storage unit (300) includes a storage box, which is connected to the water bath ultrasonic cleaning unit through a gate. An air supply device (6) is provided at the bottom of the storage box, and an air collecting hood is provided at the top of the storage box. The air collecting hood is connected to the oil and gas adsorption filter cartridge (7) through a pipeline.

6. The waste oil filter harmless storage device according to claim 5, characterized in that, The storage box is equipped with a storage roller (8), and one end of the storage roller (8) is set with a guide roller (1).

7. A method for the harmless storage of waste oil filters, implemented based on the waste oil filter harmless storage device described in claim 5 or 6, characterized in that, Includes the following steps: Step 1: Open the water bath, then arrange the filters to be cleaned on the guide roller (1), connect the oil inlet of the filter to the liquid injection nozzle (21), and connect the oil outlet of the filter to the liquid outlet nozzle (22). Step 2: Move the contact positioning part (3) toward the filter until the contact positioning part (3) opens the overflow valve in the oil outlet of the filter, and then close the water bath body; Step 3: The water bath is filled with cleaning fluid. The filter is cleaned by an ultrasonic generator (23) and the filter is vibrated. The cleaning fluid flows into the solid-liquid separation and recovery section (200). The cleaning fluid is injected into the oil inlet of the filter through the injection nozzle (21). The cleaning fluid flows through the oil inlet, filter paper, and open overflow valve to the oil outlet and flows into the solid-liquid separation and recovery section (200) through the oil outlet. Step 4: The oil-containing cleaning fluid is separated by the solid-liquid separation and recovery unit (200), and the separated cleaning fluid is transported to the liquid supply station (9) to retain the separated oil. The liquid supply station (9) will send the cleaning fluid to the injection nozzle (21) to achieve filter circulation cleaning with the water bath. Step 5: Drain the water bath tank, open the gate, and the contact positioning part (3) disengages from the filter, so that the filter rolls down along the guide roller (1) to the storage part (300). Step 6: The air supply device (6) is turned on to dry the filter. The volatile oil and gas are collected by the air collection hood and transported to the oil and gas adsorption filter cartridge (7) through the pipeline for adsorption and collection.

8. A method for harmlessly storing waste oil filters according to claim 7, characterized in that, In step 3, the injection nozzle (21) begins to inject cleaning fluid until the filter is filled with cleaning fluid. Then the outlet nozzle (22) is closed, and the ultrasonic generator (23) applies ultrasonic waves to make the cleaning fluid outside the filter resonate with the cleaning fluid inside the filter. After the resonance is maintained for a calibrated time, the outlet nozzle (22) is opened to cooperate with the injection nozzle (21) to circulate the cleaning fluid inside the filter.

9. A method for harmlessly storing waste oil filters according to claim 8, characterized in that, The time for circulating the cleaning fluid is longer than the calibration time for maintaining resonance.

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