A precision membrane separation device for industrial oil regeneration

Abstract

The application discloses an industrial waste oil regeneration precision membrane separation device, and relates to the technical field of waste oil treatment. The industrial waste oil regeneration precision membrane separation device comprises a main bin, a coarse filter assembly is arranged on the main bin, and a fine filter assembly is arranged below the main bin; the coarse filter assembly comprises an oil bin mechanism and a filter cylinder mechanism, an oil inlet mechanism is arranged directly above the filter cylinder mechanism; the oil bin mechanism comprises a first oil bin which penetrates through the bottom wall of the main bin and is fixedly connected; the filter cylinder mechanism comprises a cylinder frame, the lower end surface of the cylinder frame is fixedly connected with a filter cylinder with the same inner diameter, and the lower part of the filter cylinder is inserted into the first oil bin; the fine filter assembly comprises a detachable mechanism and a membrane cylinder mechanism; the detachable mechanism comprises a third oil bin, a bin column for supporting is fixedly connected between the third oil bin and the main bin, and two-stage filtration is complementary to each other, which not only solves the problems of easy blockage and fast flux attenuation of a single filtration mode, but also takes into account the filtration efficiency and separation precision, and greatly improves the overall regeneration and purification effect.

Description

Technical Field

[0001] This invention relates to the field of waste oil treatment technology, specifically to a precision membrane separation device for industrial waste oil regeneration. Background Technology

[0002] In industrial sectors such as machining, petrochemicals, power maintenance, and shipping, various lubricating oils, cutting oils, and transformer oils, after long-term use under high temperature, high pressure, and heavy load conditions, will mix with impurities such as metal shavings, asphalt, moisture, and oxidized polymers, gradually deteriorating and becoming industrial waste oil. Industrial waste oil is hazardous waste; direct discharge or disposal will cause serious pollution to soil and water bodies, and disorderly incineration will also produce toxic waste gases, exacerbating the environmental burden. At the same time, waste oil has a high proportion of base oil components, possessing extremely high resource recycling value. Achieving precise purification and regeneration of waste oil can not only alleviate the pressure of hazardous waste disposal but also reduce the oil procurement costs of industrial enterprises, aligning with the industrial development trend of green, low-carbon, and circular economy.

[0003] Currently, industrial waste oil regeneration processes are mainly divided into two categories: traditional extensive processes and membrane separation refining processes. Traditional regeneration processes often employ methods such as natural sedimentation and plate and frame filtration. Patent CN112827231A discloses an industrial waste oil separation and regeneration device, including a separation chamber and a filter plate. One side of the separation chamber has a horizontal storage cylinder, and the outer side of the storage cylinder has an inlet extending along its axis. Both ends of the storage cylinder are hinged to the inner wall of the separation chamber, allowing it to rotate around its own axis. The filter plate is placed inside the separation chamber, and one end of the filter plate is connected to the inner wall of the separation chamber. The storage cylinder is fixedly connected, and the other end of the filter plate is a free end. A driving device is provided outside the separation chamber. The driving device is connected to one end of the storage cylinder and is used to drive the storage cylinder to rotate around its own axis. When the storage cylinder rotates, the filter plate rotates synchronously with the storage cylinder and forces the filter material on the filter surface of the filter plate to flow towards the feed inlet. The separation chamber is provided with a leak-proof mechanism, which is located at the free end of the filter plate and always keeps in contact with the filter plate. The two sides of the filter plate are clearance-fitted with the inner wall of the separation chamber, and the two sides are respectively connected to the separation chamber through a separation membrane. Solids at the free end of the filter plate are pushed towards the end of the filter plate near the storage cylinder, thus removing impurities from this part of the filter surface. Because the free end of the filter plate rotates upwards at a certain angle, impurities in the middle of the filter plate flow towards the feed inlet due to the tilting action of the filter plate, temporarily removing impurities from this part of the filter surface. However, relying solely on the filter plate results in low separation accuracy, inability to completely remove tiny colloids and fine particulate impurities, and substandard quality of the regenerated oil. Membrane separation technology, with its advantages of high separation accuracy, no phase change, environmental friendliness, and continuous operation, has gradually become the mainstream technology for industrial waste oil regeneration. However, existing commercially available membrane separation regeneration devices generally have many technical defects. Membrane modules often use an integrated encapsulated structure; if a single membrane tube becomes clogged or damaged, the entire machine must be shut down and disassembled for replacement. This disassembly and assembly process is cumbersome and time-consuming, severely affecting production continuity.

[0004] In summary, existing industrial waste oil membrane separation devices are insufficient to achieve efficient, continuous, low-cost, and precise regeneration of industrial waste oil. Therefore, developing a precision membrane separation device for industrial waste oil regeneration has become an urgent technical problem to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to provide a precision membrane separation device for industrial waste oil regeneration, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a precision membrane separation device for industrial waste oil regeneration, comprising a main chamber, a coarse filter assembly disposed on the main chamber, and a fine filter assembly disposed below the main chamber; The coarse filter assembly includes an oil tank mechanism and a filter cartridge mechanism, with an oil inlet mechanism located directly above the filter cartridge mechanism. The oil tank mechanism includes a first oil tank that penetrates and is fixed to the bottom wall of the main tank. The filter cartridge mechanism includes a cartridge frame, and a filter cartridge of the same inner diameter is fixedly connected to the lower end face of the cartridge frame. The lower part of the filter cartridge is inserted into the first oil tank. The fine filtration assembly includes an easy-disassembly mechanism and a membrane cartridge mechanism; The detachable mechanism includes a third oil tank, and a support column is fixedly connected between the third oil tank and the main tank. The easy-to-disassemble mechanism also includes two sets of symmetrical valve tube assemblies. Each valve tube assembly includes a panel on which single valve assemblies are evenly arranged. The panel of the upper valve tube assembly is fixed to the bottom wall of the main compartment and the single valve assembly is connected to the first oil tank. The panel of the lower valve tube assembly is fixed to the top wall of the third oil tank and the single valve assembly is connected to the third oil tank. A membrane tube mechanism corresponding to a single valve assembly is provided between the upper and lower sets of valve tube assemblies. The membrane tube mechanism includes a membrane tube, a filter membrane is inserted into the membrane tube, and a handle is fixed to the outside of the membrane tube. The two ends of the membrane tube are symmetrically provided with mating components for connecting to the single valve assembly.

[0007] As a preferred embodiment of the present invention, pad rollers are fixedly embedded in the middle part of the upper end face of the four side walls of the first oil tank. The first oil tank has a first base fixedly connected to the middle part of the inner wall of each of its four sides, and an electric cylinder is movably hinged to the inner end of the first base via a rotating shaft.

[0008] As a preferred embodiment of the present invention, the oil inlet mechanism includes a second oil tank, the lower end of which is tapered and faces the cylinder frame. The upper part of the second oil tank is tangentially connected to an oil inlet pipe; A cover is fixedly connected to the upper end face of the second oil tank; The second oil tank is equipped with a rotating assembly, which includes a fan shaft located at the axis of the second oil tank. The fan shaft is movably connected to the tank cover through a bearing. The fan shaft has a vertically extending shaft hole with a rectangular cross-section. The upper part of the fan shaft is fixedly connected with fan blades adapted to the second oil tank at equal intervals. An electric rail is fixedly connected to the upper surface of the compartment cover.

[0009] The filter cartridge mechanism is equipped with a self-cleaning sewage discharge mechanism, which includes a top plate and a sliding rail column fixedly connected to the side of the top plate. A rotating column is movably inserted into the center of the top plate via a bearing. The lower end of the rotating column is fixedly connected to a sliding rod adapted to insert a fan shaft. The lower end of the sliding rod is fixedly connected to a shaft. The lower end of the shaft is movably connected to a tapered filter screen via a bearing. The lower end face of the filter screen is fixedly connected to a filter ring adapted to insert a filter cartridge. A spiral scraper is fixedly wound around the shaft, and the scraper is adapted to fit and adhere to the filter screen and the filter cartridge.

[0010] As a preferred technical solution of the present invention, an ear plate mechanism for guiding impurities is provided between the oil tank mechanism and the oil inlet mechanism. The ear plate mechanism includes a first column, the upper end face corner of the first oil tank is fixedly connected to the first column, the upper end of the first column is fixedly connected to a second column, and the upper end of the second column jointly supports the second oil tank. The first column has a vertical plate fixedly connected to its inner middle section, and the cylindrical frame passes through the vertical plate. The side of the upright plate is movably fitted with a roller shaft via a bearing, and the side is fixedly connected with a corresponding pad roller ear plate. The lower surface of the ear plate is fixedly connected to the middle of the outer side of the ear plate, and the output end of the electric cylinder is correspondingly hinged to the second base via a rotating shaft.

[0011] As a preferred embodiment of the present invention, the fitting assembly includes a receiving chamber with a fixed membrane tube, and a vertical groove is provided through the side of the receiving chamber. The receiving chamber has a tapered tube that can be inserted into its port. The inner port of the tapered tube is fixedly connected to a bellows, and the inner port of the bellows passes through the receiving chamber and is connected to the membrane tube. A fixed push rod is inserted inside the cone, and the push rod extends out of the outer port of the cone; The cone is fixedly connected to a groove column that fits to the vertical groove, and the outer end of the groove column is movably inserted with a hook-shaped hanging column through a tension spring.

[0012] The single valve assembly includes a connecting pipe that penetrates the fixed panel, and an edge plate that fits the receiving chamber extends from one end of the connecting pipe toward the membrane cylinder mechanism. The edge plate has a groove adapted to hang the hanging column. The connecting pipe has a vertical through hole, the middle of which is recessed, and the end of the hole facing the membrane cylinder mechanism is adapted to be inserted into a conical cylinder. A perforated plate is fixedly connected to one end of the tube hole facing away from the membrane cylinder mechanism. A spring is fixedly connected to the surface of the perforated plate, and an oil plug that seals the middle of the tube hole is fixedly connected to the end of the spring.

[0013] Compared with the prior art, the beneficial effects of the present invention are: (1) A precision membrane separation device for industrial waste oil regeneration, wherein the coarse filter component adopts a traditional high-efficiency filtration method, which can quickly intercept and remove most of the large particulate mechanical impurities, colloids and flocculent matter and other visible pollutants in the waste oil, greatly reducing the load on the downstream fine filter and avoiding the problem of flow obstruction caused by impurity accumulation; the fine filter component adopts a precision membrane separation mode, which specifically filters out fine pollutants such as tiny suspended particles and oxidized impurities, and realizes deep refining and purification of waste oil. The two-stage filtration performs its own function and complements each other, which not only solves the disadvantages of easy clogging and rapid flux decline of a single filtration mode, but also takes into account filtration efficiency and separation accuracy, and greatly improves the overall regeneration and purification effect.

[0014] (2) A precision membrane separation device for industrial waste oil regeneration, when a single membrane cylinder mechanism is blocked or damaged, the hanging column is taken out from the groove on the side plate, and then the groove column is driven to slide along the vertical groove, and the cone and top rod are retracted into the receiving chamber. At this time, the membrane cylinder mechanism can be extracted separately for cleaning or replacement without disassembling the whole machine or shutting down the whole set of equipment, which greatly improves the operation and maintenance efficiency.

[0015] (3) A precision membrane separation device for industrial waste oil regeneration, when the membrane tube mechanism is inserted between the upper and lower valve tube assemblies, the hanging column is locked in the groove opened on the side plate, and the cone tube is adapted to the insertion pipe hole under the drive of the groove column. At the same time, the push rod extends in to lift the oil plug, and the single valve assembly is automatically opened at this time. When the membrane tube mechanism is removed, the oil plug is resealed under the action of the spring through the retraction of the cone tube and the push rod, thereby completing the automatic opening and closing of the oil circuit interface during the insertion and removal process, which not only prevents oil leakage and impurity backflow, but also does not affect the continuous separation operation of the other membrane tubes, and improves the flexibility of disassembly and assembly.

[0016] (4) A precision membrane separation device for industrial waste oil regeneration, through the cylindrical design of the filter cartridge, under the action of gravity, impurities in the waste oil gradually accumulate on the filter screen and pile up along the filter cartridge, while the blank area of ​​the filter cartridge that is not blocked by impurities can still maintain normal filtration flow, effectively extending the effective working time of a single filtration, avoiding instantaneous blockage of impurities leading to filtration interruption, and improving filtration smoothness.

[0017] (5) A precision membrane separation device for industrial waste oil regeneration, wherein the waste oil entering the second oil tank through the oil inlet pipe can drive the fan blades and thus drive the fan shaft to rotate, and the slide rod is adapted to pass through the fan shaft through the shaft hole, thereby driving the shaft rod and scraper to rotate. The scraper can scrape off mechanical impurities such as iron filings, welding slag, and large clumps accumulated on the inner surface of the filter cartridge in real time. The impurities automatically settle to the bottom, providing self-cleaning capability.

[0018] (6) A precision membrane separation device for industrial waste oil regeneration, through the design of a conical filter screen and the extension of an electric cylinder, the outer side of the ear plate is tilted upward, and impurities slide down the surface of the filter screen onto the ear plate, and further drain the oil on the ear plate. As the sewage discharge mechanism returns to its original position, the ear plate returns to its original position. In this way, the filter cartridge mechanism and the sewage discharge mechanism work together to perform coarse filtration again. At the same time, the ear plate returns to its original position and flips so that its outer side tilts downward, and the waste residue is poured into the main chamber, improving the automation and accuracy of the sewage discharge. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the easy-to-disassemble mechanism of the present invention.

[0021] Figure 3 This is a schematic diagram of the membrane tube mechanism of the present invention.

[0022] Figure 4 This is a schematic diagram of the internal structure of the membrane tube mechanism of the present invention.

[0023] Figure 5 This is a schematic diagram of the membrane tube mechanism docking of the present invention.

[0024] Figure 6 This is a schematic diagram of the oil tank mechanism of the present invention.

[0025] Figure 7 This is a schematic diagram of the ear plate mechanism of the present invention.

[0026] Figure 8 This is a schematic diagram showing the location of the sewage discharge mechanism of the present invention.

[0027] Figure 9 This is a schematic diagram of the sewage discharge mechanism of the present invention.

[0028] Figure 10 This is a schematic diagram of the oil inlet mechanism of the present invention.

[0029] Figure 11 This is a schematic diagram of the inclined ear plate of the present invention.

[0030] In the diagram: 1. Main compartment; 2. Oil tank mechanism; 201. First oil tank; 202. Pad roller; 203. First base; 204. Electric cylinder; 3. Ear plate mechanism; 301. First column; 302. Second column; 303. Vertical plate; 304. Roller shaft; 305. Ear plate; 306. Second base; 4. Filter cartridge mechanism; 401. Frame; 402. Filter cartridge; 5. Oil inlet mechanism; 501. Second oil tank; 502. Oil inlet pipe; 503. Tank cover; 504. Fan shaft; 505. Shaft hole; 506. Fan blade; 507. Electric rail; 6. Sewage discharge mechanism; 601. Top plate; 6 02. Rail post; 603. Rotating column; 604. Slide rod; 605. Shaft; 606. Filter screen; 607. Filter ring; 608. Scraper; 7. Easy-to-disassemble mechanism; 701. Third oil tank; 702. Tank column; 703. Panel; 704. Connecting pipe; 705. Edge plate; 706. Pipe hole; 707. Orifice plate; 708. Spring; 709. Oil plug; 8. Membrane cylinder mechanism; 801. Membrane cylinder; 802. Filter membrane; 803. Handle; 804. Receiving chamber; 805. Vertical groove; 806. Conical cylinder; 807. Bellows; 808. Top rod; 809. Groove column; 810. Hanging column. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 A precision membrane separation device for industrial waste oil regeneration includes a main chamber 1, a coarse filter assembly on the main chamber 1, and a fine filter assembly below the main chamber 1. The coarse filter assembly includes an oil tank mechanism 2 and a filter cartridge mechanism 4, with an oil inlet mechanism 5 located directly above the filter cartridge mechanism 4; The oil tank mechanism 2 includes a first oil tank 201 that penetrates and is fixed to the bottom wall of the main tank 1; The filter cartridge mechanism 4 includes a cartridge frame 401, and a filter cartridge 402 with the same inner diameter is fixedly connected to the lower end face of the cartridge frame 401. The lower part of the filter cartridge 402 is inserted into the first oil tank 201. The fine filtration assembly includes an easy-to-disassemble mechanism 7 and a membrane cartridge mechanism 8; The easily detachable mechanism 7 includes a third oil tank 701, and a support column 702 is fixedly connected between the third oil tank 701 and the main tank 1. The easy-to-disassemble mechanism 7 also includes two sets of symmetrical valve tube assemblies. Each valve tube assembly includes a panel 703, on which single valve assemblies are evenly arranged. The panel 703 of the upper valve tube assembly is fixed to the bottom wall of the main compartment 1 and the single valve assembly is connected to the first oil compartment 201. The panel 703 of the lower valve tube assembly is fixed to the top wall of the third oil compartment 701 and the single valve assembly is connected to the third oil compartment 701. A membrane cylinder mechanism 8 corresponding to a single valve assembly is provided between the upper and lower sets of valve tube assemblies. The membrane cylinder mechanism 8 includes a membrane cylinder 801, a filter membrane 802 inserted into the membrane cylinder 801, and a handle 803 fixed to the outside of the membrane cylinder 801. The two ends of the membrane cylinder 801 are symmetrically provided with mating components for connecting to the single valve assembly.

[0033] Please see Figure 6 Pad rollers 202 are fixedly embedded in the middle of the upper end face of the four side walls of the first oil tank 201; The first oil tank 201 has a first base 203 fixedly connected to the middle part of the inner wall of each of its four sides. The inner end of the first base 203 is movably hinged to an electric cylinder 204 via a rotating shaft.

[0034] Please see Figure 8 , Figure 9 , Figure 10 The oil inlet mechanism 5 includes a second oil tank 501, the lower end of which is tapered and faces the cylinder frame 401. The upper part of the second oil tank 501 is tangentially connected to an oil inlet pipe 502. The oil inlet pipe 502 is connected to a high-pressure pump so that the industrial waste oil can form a vortex in the second oil tank 501 after being poured in. The upper end face of the second oil tank 501 is fixedly connected to the tank cover 503; A rotating assembly is provided inside the second oil tank 501. The rotating assembly includes a fan shaft 504 located on the axis of the second oil tank 501. The fan shaft 504 is movably inserted into the tank cover 503 through a bearing. The fan shaft 504 has a vertically extending shaft hole 505 with a rectangular cross section. Fan blades 506 adapted to the second oil tank 501 are fixedly connected to the upper part of the fan shaft 504 at equal and even intervals. An electric rail 507 is fixedly connected to the upper surface of the compartment cover 503.

[0035] The filter cartridge mechanism 4 is equipped with a self-cleaning sewage discharge mechanism 6. The sewage discharge mechanism 6 includes a top plate 601, and the side of the top plate 601 is fixedly connected to the rail column 602 of the sliding electric rail 507. A rotating column 603 is movably inserted into the center of the surface of the top plate 601 via a bearing. The lower end of the rotating column 603 is fixedly connected to a slide rod 604 adapted to insert the fan shaft 504. The lower end of the slide rod 604 is fixedly connected to a shaft 605. The lower end of the shaft 605 is movably connected to a conical filter screen 606 via a bearing. The lower end face of the filter screen 606 is fixedly connected to a filter ring 607 adapted to insert the filter cartridge 402. A spiral scraper 608 is fixedly wound around the shaft 605. The scraper 608 is adapted to fit and adhere to the filter screen 606 and the filter cartridge 402.

[0036] Please see Figure 1 , Figure 7 , Figure 11 An ear plate mechanism 3 for guiding impurities is provided between the oil tank mechanism 2 and the oil inlet mechanism 5. The ear plate mechanism 3 includes a first column 301. The upper end face corner of the first oil tank 201 is fixedly connected to the first column 301. The upper end of the first column 301 is fixedly connected to a second column 302. The upper end of the second column 302 is jointly supported by the second oil tank 501. The first column 301 has a vertical plate 303 fixedly connected to the inner side of the middle, and the tube frame 401 is fixedly connected to the vertical plate 303 through it. A roller 304 is movably fitted onto the side of the upright plate 303 via a bearing. A corresponding ear plate 305 is fixedly connected to the side of the upright plate 303. A second base 306 is fixedly connected to the middle of the outer side of the lower surface of the ear plate 305. The output end of the electric cylinder 204 is correspondingly hinged to the second base 306 via a rotating shaft. When the electric cylinder 204 retracts, the outer side of the ear plate 305 tilts downward and overlaps the pad roller 202. When the electric cylinder 204 extends, the outer side of the ear plate 305 tilts upward.

[0037] Please see Figure 4 , Figure 5 The insertion assembly includes a receiving compartment 804 with a fixed membrane tube 801, and a vertical groove 805 is provided through the side of the receiving compartment 804. The port of receiving chamber 804 is adapted to be inserted with a tapered cone 806. The inner port of the cone 806 is fixedly connected to a bellows 807. The inner port of the bellows 807 passes through the receiving chamber 804 and is connected to the membrane cylinder 801. A fixed push rod 808 is inserted inside the cone 806, and the push rod 808 extends out of the outer port of the cone 806; The cone 806 is fixedly connected to a groove post 809 that fits and inserts into the vertical groove 805. The outer end of the groove post 809 is movably connected to a hook-shaped hanging post 810 via a tension spring.

[0038] The single valve assembly includes a pipe 704 that penetrates the fixed panel 703. One end of the pipe 704 facing the membrane cylinder mechanism 8 extends a side plate 705 that fits the receiving chamber 804. The side plate 705 has a groove adapted to hang the hanging post 810. The pipe 704 has a vertical through hole 706, the middle of the pipe hole 706 is recessed, and the end of the pipe hole 706 facing the membrane cylinder mechanism 8 is adapted to insert the cone cylinder 806. A perforated plate 707 is fixedly connected to one end of the tube hole 706 facing away from the membrane cylinder mechanism 8. A spring 708 is fixedly connected to the surface of the perforated plate 707. An oil plug 709 that seals the middle of the tube hole 706 is fixedly connected to the end of the spring 708. When the hanging column 810 is hung on the edge plate 705, the push rod 808 pushes up the oil plug 709.

[0039] The working principle of this invention is as follows: The main chamber 1 is equipped with coarse and fine filtration components, respectively, employing a two-stage series filtration system. The coarse filtration component uses a traditional high-efficiency filtration method to quickly trap and remove most large mechanical impurities, clumps, and other visible pollutants from waste oil, significantly reducing the load on the downstream fine filtration and preventing flow obstruction caused by impurity accumulation. The fine filtration component uses a precision membrane separation method to specifically filter out tiny suspended particles, oxidized impurities, and other fine pollutants, achieving deep refining and purification of waste oil. The two-stage filtration performs its respective function and complements each other, solving the drawbacks of single filtration modes such as easy clogging and rapid flux decline, while balancing filtration efficiency and separation precision, significantly improving the overall regeneration and purification effect.

[0040] A membrane cylinder mechanism 8 corresponding to a single valve assembly is set between the upper and lower sets of valve pipe assemblies. The two ends of the membrane cylinder 801 are symmetrically equipped with plug-in components for docking with the single valve assembly. The membrane cylinder mechanism 8 adopts an independent parallel structure and is connected by a self-closing quick-connect method of the single valve assembly and the plug-in component. When a single membrane cylinder mechanism 8 is blocked or damaged, the hanging column 810 is removed from the groove on the side plate 705, and then the groove column 809 is driven to slide along the vertical groove 805, and the cone cylinder 806 and the top rod 808 are retracted into the receiving chamber 804. At this time, the membrane cylinder mechanism 8 can be pulled out separately for cleaning or replacement without disassembling the whole machine or shutting down the whole set of equipment, which greatly improves the operation and maintenance efficiency.

[0041] When the diaphragm tube mechanism 8 is inserted between the upper and lower valve tube assemblies, the hanging column 810 is locked in the groove on the side plate 705. At the same time, the cone 806 is adapted to the insertion tube hole 706 by the groove column 809, and the push rod 808 extends in to lift the oil plug 709. At this time, the single valve assembly is automatically opened. When the diaphragm tube mechanism 8 is removed, the oil plug 709 re-seals the tube hole 706 under the action of the spring 708 through the retraction of the cone 806 and the push rod 808. This completes the automatic opening and closing of the oil circuit interface during the insertion and removal process, which not only prevents oil leakage and impurity backflow, but also does not affect the continuous separation operation of other diaphragm tubes, improving the flexibility of disassembly and assembly.

[0042] Before entering the fine filter assembly, the waste oil is first filtered through the coarse filter assembly. The waste oil is spirally introduced into the second oil tank 501 from the oil inlet pipe 502, and then enters the filter cartridge 402 for filtration through the lower port of the second oil tank 501. Initially, the conical filter screen 606 is located at the bottom of the filter cartridge 402. After being filtered by the filter cartridge 402 and the filter screen 606, the waste oil flows into the first oil tank 201. Due to the cylindrical design of the filter cartridge 402, under the action of gravity, impurities in the waste oil gradually accumulate on the filter screen 606 and pile up along the filter cartridge 402. The blank area of ​​the filter cartridge 402 that is not blocked by impurities can still maintain a normal filtration flow state, effectively extending the effective working time of a single filtration, avoiding instantaneous blockage of impurities that would cause filtration interruption, and improving filtration smoothness.

[0043] Waste oil entering the second oil tank 501 through the oil inlet pipe 502 can drive the fan blades 506 and thus drive the fan shaft 504 to rotate. The slide rod 604 is adapted to pass through the fan shaft 504 through the shaft hole 505, thereby driving the shaft 605 and scraper 608 to rotate. The scraper 608 can scrape off mechanical impurities such as iron filings, welding slag, and large clumps accumulated on the inner surface of the filter cartridge 402 in real time. The impurities automatically settle to the bottom, providing self-cleaning capability.

[0044] The timed start of the electric rail 507 causes the top plate 601 to move up and down via the rail column 602, thereby driving the filter screen 606 to move upward along the cylinder frame 401 and filter cylinder 402, carrying out the impurities accumulated inside. Through the design of the conical filter screen 606, combined with the extension of the electric cylinder 204, the outer side of the ear plate 305 tilts upward, and the impurities slide down the surface of the filter screen 606 onto the ear plate 305, where they are further drained. As the sewage discharge mechanism 6 returns to its original position, the ear plate 305 returns to its original position. In this way, the filter cylinder mechanism 4 and the sewage discharge mechanism 6 work together to perform coarse filtration again. At the same time, the ear plate 305 returns to its original position and flips, causing its outer side to tilt downward, dumping the waste residue into the main chamber 1, improving the automation and accuracy of the sewage discharge.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision membrane separation device for industrial waste oil regeneration, comprising a main chamber (1), wherein a coarse filter assembly is provided on the main chamber (1), and a fine filter assembly is provided below the main chamber (1); The coarse filter assembly includes an oil tank mechanism (2) and a filter cartridge mechanism (4), with an oil inlet mechanism (5) located directly above the filter cartridge mechanism (4). The oil tank mechanism (2) includes a first oil tank (201) that penetrates and is fixed to the bottom wall of the main tank (1). Its features are: The filter cartridge mechanism (4) includes a cartridge frame (401), and a filter cartridge (402) of the same inner diameter is fixedly connected to the lower end face of the cartridge frame (401). The lower part of the filter cartridge (402) is inserted into the first oil tank (201). The fine filtration assembly includes an easy-to-disassemble mechanism (7) and a membrane cartridge mechanism (8). The detachable mechanism (7) includes a third oil tank (701), and a support column (702) is fixedly connected between the third oil tank (701) and the main tank (1). The detachable mechanism (7) also includes two sets of symmetrical valve tube assemblies. Each valve tube assembly includes a panel (703) on which single valve assemblies are evenly arranged. The panel (703) of the upper valve tube assembly is fixed to the bottom wall of the main compartment (1) and the single valve assembly is connected to the first oil compartment (201). The panel (703) of the lower valve tube assembly is fixed to the top wall of the third oil compartment (701) and the single valve assembly is connected to the third oil compartment (701). A membrane tube mechanism (8) corresponding to a single valve assembly is provided between the upper and lower sets of valve tube assemblies. The membrane tube mechanism (8) includes a membrane tube (801), a filter membrane (802) is inserted into the membrane tube (801), and a handle (803) is fixed to the outside of the membrane tube (801). The two ends of the membrane tube (801) are symmetrically provided with mating components for connecting to the single valve assembly.

2. The precision membrane separation device for industrial waste oil regeneration according to claim 1, characterized in that: The four side walls of the first oil tank (201) are respectively fixedly embedded with pad rollers (202) in the middle of the upper end face. The first oil tank (201) has a first base (203) fixedly connected to the middle part of the inner wall of each of its four sides. The inner end of the first base (203) is movably hinged to an electric cylinder (204) via a rotating shaft.

3. The precision membrane separation device for industrial waste oil regeneration according to claim 1, characterized in that: The oil inlet mechanism (5) includes a second oil tank (501), the lower end of which is tapered and faces the cylinder frame (401). The upper part of the second oil tank (501) is tangentially connected to an oil inlet pipe (502). The upper end face of the second oil tank (501) is fixedly connected with a tank cover (503); The second oil tank (501) is provided with a rotating assembly, which includes a fan shaft (504) located on the axis of the second oil tank (501). The fan shaft (504) is movably connected to the tank cover (503) through a bearing. The fan shaft (504) is vertically penetrated by a shaft hole (505) with a rectangular cross section. The upper part of the fan shaft (504) is fixedly connected with fan blades (506) adapted to the second oil tank (501) at equal intervals. An electric rail (507) is fixedly connected to the upper surface of the cover (503).

4. The precision membrane separation device for industrial waste oil regeneration according to claim 3, characterized in that: The filter cartridge mechanism (4) is provided with a self-cleaning sewage discharge mechanism (6). The sewage discharge mechanism (6) includes a top plate (601), and the side of the top plate (601) is fixedly connected to the rail post (602) of the sliding electric rail (507). A rotating column (603) is movably inserted into the center of the surface of the top plate (601) via a bearing. The lower end of the rotating column (603) is fixedly connected to a sliding rod (604) adapted to insert a fan shaft (504). The lower end of the sliding rod (604) is fixedly connected to a shaft (605). The lower end of the shaft (605) is movably connected to a conical filter screen (606) via a bearing. The lower end face of the filter screen (606) is fixedly connected to a filter ring (607) adapted to insert a filter cartridge (402). A spiral scraper (608) is fixedly wound around the shaft (605). The scraper (608) is adapted to fit the filter screen (606) and the filter cartridge (402).

5. The precision membrane separation device for industrial waste oil regeneration according to claim 3, characterized in that: An ear plate mechanism (3) for guiding impurities is provided between the oil tank mechanism (2) and the oil inlet mechanism (5). The ear plate mechanism (3) includes a first column (301). The upper end face corner of the first oil tank (201) is fixedly connected to the first column (301). The upper end of the first column (301) is fixedly connected to a second column (302). The upper end of the second column (302) is jointly supported by the second oil tank (501).

6. The precision membrane separation device for industrial waste oil regeneration according to claim 5, characterized in that: The first column (301) has a vertical plate (303) fixedly connected to the inner side of its middle part, and the cylindrical frame (401) is fixedly connected to the vertical plate (303) through it. The side of the upright plate (303) is movably fitted with a roller shaft (304) via a bearing. The side of the (403) is fixedly connected with a corresponding ear plate (305) of the pad roller (202). The lower surface of the ear plate (305) is fixedly connected to the middle of the outer side of the second base (306). The output end of the electric cylinder (204) is correspondingly hinged to the second base (306) via a rotating shaft.

7. The precision membrane separation device for industrial waste oil regeneration according to claim 1, characterized in that: The fitting assembly includes a receiving compartment (804) with a fixed membrane tube (801), and a vertical groove (805) is provided through the side of the receiving compartment (804). The receiving chamber (804) has a tapered tube (806) that is fitted into its port. The inner port of the tapered tube (806) is fixedly connected to a bellows (807). The inner port of the bellows (807) passes through the receiving chamber (804) and is connected to the membrane tube (801).

8. The precision membrane separation device for industrial waste oil regeneration according to claim 7, characterized in that: A fixed push rod (808) is inserted inside the cone (806), and the push rod (808) extends out of the outer port of the cone (806); The cone (806) is fixedly connected to a groove post (809) that is adapted to insert into the vertical groove (805), and the outer end of the groove post (809) is movably inserted with a hook-shaped hanging post (810) via a tension spring.

9. The precision membrane separation device for industrial waste oil regeneration according to claim 7, characterized in that: The single valve assembly includes a pipe (704) that penetrates the fixed panel (703), and a side plate (705) that fits the receiving chamber (804) extends from one end of the pipe (704) toward the membrane cylinder mechanism (8). The side plate (705) has a groove adapted to the hanging post (810). The connecting pipe (704) has a vertical through hole (706), the middle of the hole (706) is recessed, and the end of the hole (706) facing the membrane cylinder mechanism (8) is adapted to insert a conical cylinder (806).

10. The precision membrane separation device for industrial waste oil regeneration according to claim 9, characterized in that: A perforated plate (707) is fixedly connected to one end of the tube hole (706) facing away from the membrane cylinder mechanism (8). A spring (708) is fixedly connected to the surface of the perforated plate (707). An oil plug (709) is fixedly connected to the end of the spring (708) to seal the middle of the tube hole (706).

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