Regeneration system of activated clay refining waste lubricating oil

Abstract

The application discloses a kind of active clay refining waste lubricating oil's regeneration utilization system, belong to waste lubricating oil regeneration technical field.The system includes reaction kettle body, is located in the stirring shaft of the reaction kettle body inside and driving motor;The bottom of the reaction kettle body is communicated with filter assembly, filter screen hopper is equipped in the filter assembly;The bottom end of the stirring shaft is fixed with anti-deposition scraper, and the bottom of the anti-deposition scraper is equipped with wear-resistant strip, and the wear-resistant strip is attached to the upper surface of the filter screen hopper and is slidably connected.The linkage setting of anti-deposition scraper and wear-resistant strip can mechanically clean the surface of filter screen hopper.The application solves the technical problems of agglomeration of active clay feeding, bottom filter screen clogging and circulating pump idling in the prior art, and has the advantages of preventing deposition and clogging, and facilitating continuous and stable operation of the system.

Description

Technical Field

[0001] This invention relates to the field of waste lubricating oil regeneration technology, specifically to a regeneration and utilization system for waste lubricating oil refined with activated clay. Background Technology

[0002] Currently, activated clay is commonly used as an adsorbent for decolorization and impurity removal in the regeneration and refining process of waste lubricating oil. Current refining equipment typically involves directly feeding dry activated clay powder into the reactor through a feed port at the top, where it is stirred and mixed using internal paddles. The resulting oil is then extracted through pipes and a filter at the bottom of the reactor and pressurized by an external circulation pump for subsequent processing.

[0003] However, existing technologies have the following drawbacks in practical use: First, due to the high viscosity of waste lubricating oil, direct feeding from above the liquid surface causes the lightweight clay powder to easily agglomerate upon contact with the oil surface, forming clumps with an oil-coated exterior and dry powder interior. Conventional stirring paddles are unable to disperse these clumps, reducing the specific surface area utilization rate of the activated clay. Second, the increased density of the clay after adsorbing impurities makes it prone to significant deposition in the conical area at the bottom of the reactor. Existing bottom outlet filtration devices lack a self-cleaning structure, allowing deposited clay and colloidal impurities to quickly clog the filter screen pores, leading to blockage of the outlet channel. This not only necessitates frequent shutdowns for disassembly and cleaning but also causes the external circulation pump at the rear to run dry due to insufficient liquid intake, resulting in pump damage from dry burning and hindering continuous and stable operation of the equipment.

[0004] Therefore, there is an urgent need to design a recycling system for waste lubricating oil from activated clay refining to solve the problems of easy agglomeration of activated clay during feeding, easy clogging of the bottom filter screen, and easy cavitation and dry burning of the circulating pump in existing equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a recycling system for waste lubricating oil from activated clay refining, in order to improve the technical problems existing in the prior art, such as easy agglomeration of feed, easy clogging of bottom filter screen, and easy cavitation and dry burning of circulation pump.

[0006] The technical solution adopted by the present invention to solve the above problems is: a recycling system for waste lubricating oil from activated clay refining, comprising a reaction vessel body, a stirring shaft disposed inside the reaction vessel body, and a drive motor for driving the stirring shaft to rotate. A filter assembly is connected to the bottom of the reaction vessel body, and a filter screen hopper is provided inside the filter assembly. An anti-settling scraper is fixedly connected to the bottom end of the stirring shaft, and a wear-resistant strip is provided at the bottom of the anti-settling scraper. The wear-resistant strip is attached to and slidably engaged with the upper surface of the filter screen hopper.

[0007] Preferably, the filter screen bucket has an inverted conical structure, the anti-sedimentation scraper is inclined, and the inclination angle of the anti-sedimentation scraper is adapted to the angle of the inner conical surface of the filter screen bucket.

[0008] Preferably, the filter assembly includes, from top to bottom, the filter screen, the filter element, and the bottom cover. The bottom of the reactor body is fixed with a lower flange, and the bottom cover is detachably and sealingly connected to the bottom of the reactor body through the lower flange.

[0009] Preferably, a clay feeding hopper and a spiral feed pipe are provided above the reactor body. The upper end of the spiral feed pipe is connected to the discharge port of the clay feeding hopper, and a spiral feeding motor is provided on the spiral feed pipe. The lower end of the spiral feed pipe penetrates the top wall of the reactor body and extends into the reactor body.

[0010] Preferably, a dispersing disc is fixedly mounted on the lower middle part of the stirring shaft, and the dispersing disc is located above the anti-settling scraper; a discharge port is provided at the lower end of the spiral feed pipe, and the discharge port is positioned directly opposite the dispersing disc.

[0011] Preferably, the reactor body is provided with a forced circulation loop outside, the circulation loop including a sludge pipe, a clean oil pipe, a circulation pump, a circulation outlet pipe, and an annular spray pipe; the oil inlet end of the sludge pipe is connected to the reactor body, and the oil outlet end of the sludge pipe is connected to the input end of the circulation pump; the oil inlet end of the clean oil pipe is connected to the bottom cover, and a bypass branch is led out from the clean oil pipe to the input end of the circulation pump; the output end of the circulation pump is connected to the annular spray pipe through the circulation outlet pipe.

[0012] Preferably, a one-way valve is connected in series on the bypass branch, and two sets of fine filters are connected in parallel on the sludge pipe. The two ends of the two sets of fine filters are respectively connected to the sludge pipe through a three-way valve.

[0013] Preferably, the annular spray pipe is horizontally fixed to the inner top of the reactor body, and the bottom of the annular spray pipe has multiple nozzles that are inclined downwards.

[0014] Preferably, the top of the reactor body is provided with an upper flange, and the top opening of the reactor body is detachably connected to a top cover through the upper flange. The drive motor is vertically fixed above the top cover, and an oil filling port is provided on the top cover.

[0015] Preferably, the end of the oil purification pipe furthest from the bottom cover is connected to a vacuum oil filter.

[0016] Compared with the prior art, the present invention has the following advantages and effects:

[0017] This invention solves the technical problem of blocked liquid outlet caused by sedimented clay and colloidal substances clogging the filter screen by setting an anti-settling scraper with wear-resistant strips at the bottom of the stirring shaft, which keeps the wear-resistant strips in close contact with the upper surface of the filter screen. By setting a spiral feed pipe that extends through the liquid surface and discharges material directly to the dispersion disc below, the activated clay powder is dispersed in the shear zone below the liquid surface, solving the problem of powder agglomeration caused by the free fall of dry clay above the liquid surface. The bypass branch from the clean oil pipe and the cooperation of the circulation pump input end enable the overall circulation system to have a backup oil source compensation capability when the main oil pipe supply is insufficient, reducing the risk of dry burning and damage to the circulation pump due to insufficient liquid suction. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the overall structure of the activated clay refining waste lubricating oil recycling system of the present invention.

[0019] Figure 2 for Figure 1 A magnified view of part A (showing the bottom filtration and anti-sedimentation linkage cleaning structure);

[0020] Figure 3 for Figure 1 A magnified view of part B (showing the parallel fine filtration structure of the pipeline).

[0021] Figure Numbers: Reactor Body 10, Lower Flange 11, Upper Flange 12, Top Cover 13, Oil Inlet 14, Stirring Shaft 20, Anti-Sedimentation Scraper 21, Wear-resistant Strip 22, Dispersion Disc 23, Drive Motor 30, Filter Assembly 40, Filter Screen Hopper 41, Filter Element 42, Bottom Cover 43, White Clay Feed Hopper 50, Spiral Feed Pipe 60, Spiral Feeding Motor 61, Sludge Pipe 70, Fine Filter 71, Three-way Valve 72, Clean Oil Pipe 80, Bypass Branch 81, Check Valve 82, Vacuum Oil Filter 83, Circulating Pump 90, Circulating Oil Outlet Pipe 100, Annular Spray Pipe 110, Nozzle 111. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0023] See Figures 1 to 3 This invention provides a recycling system for waste lubricating oil from activated clay refining, specifically comprising a reactor body 10, a stirring shaft 20 disposed inside the reactor body 10, and a drive motor 30 for driving the stirring shaft 20 to rotate. The reactor body 10 has an upper flange 12 at its top, and a top cover 13 is detachably connected to the top opening of the reactor body 10 via the upper flange 12. The drive motor 30 is vertically fixed above the top cover 13, and an oil inlet 14 is provided on the top cover 13.

[0024] Specifically, in this embodiment, a filter assembly 40 is connected to the bottom of the reactor body 10. (See also...) Figure 2 The filter assembly 40 includes, from top to bottom, a filter screen 41, a filter element 42, and a bottom cover 43. A lower flange 11 is fixed to the bottom of the reactor body 10, and the bottom cover 43 is detachably and sealingly connected to the reactor body 10 through the lower flange 11. This structure is designed to facilitate the removal of the lower flange 11 during maintenance to replace the internal filter element 42.

[0025] To address the issue of filter clogging, an anti-settling scraper 21 is fixedly connected to the bottom of the stirring shaft 20. The bottom of the anti-settling scraper 21 is equipped with wear-resistant strips 22, which are attached to and slide against the upper surface of the filter hopper 41. The filter hopper 41 has an inverted conical structure, and the anti-settling scraper 21 is tilted, with the tilt angle matching the angle of the inner conical surface of the filter hopper 41. During operation, oil containing activated clay enters the filter hopper 41 by gravity, intercepting large solid particles. The stirring shaft 20 drives the anti-settling scraper 21 and wear-resistant strips 22 to rotate synchronously, with the wear-resistant strips 22 continuously scraping away solid deposits adhering to the surface of the filter hopper 41. Because the anti-settling scraper 21 has an arc-shaped paddle-like structure, its rotation generates an upward thrust, pushing the scraped material back into the stirring flow field above the reactor body 10, maintaining the unobstructed flow of the filter pores.

[0026] To address the issue of material agglomeration during feeding, a clay feeding hopper 50 and a spiral feed pipe 60 are installed above the reactor body 10. The upper end of the spiral feed pipe 60 is connected to the outlet of the clay feeding hopper 50, and a spiral feeding motor 61 is installed on the spiral feed pipe 60. The lower end of the spiral feed pipe 60 penetrates the top wall of the reactor body 10 and extends into the lower middle part of the reactor body 10. A dispersion disc 23 is fixedly mounted on the lower middle part of the stirring shaft 20, and the discharge port at the lower end of the spiral feed pipe 60 is positioned directly opposite the dispersion disc 23. The dispersion disc 23 serves as a high-speed shearing component, with a toothed structure on its outer edge, generating shearing force during rotation. The activated clay powder is fed quantitatively by the screw feeder motor 61. It enters the central receiving area of ​​the dispersing disc 23 directly from the discharge port at the lower end of the screw feed pipe 60. It is then crushed and thrown out by strong shear force. Under normal working conditions, both the dispersing disc 23 and the discharge port are below the liquid surface, thereby avoiding the agglomeration of powder caused by standing on the liquid surface.

[0027] To address the issue of the circulating pump easily cavitating and running dry, a circulation loop is provided externally on the reactor body 10. The circulation loop includes a waste oil pipe 70, a clean oil pipe 80, a circulating pump 90, a circulating oil outlet pipe 100, and a ring-shaped spray pipe 110. Combined with... Figure 3As shown, the oil inlet of the sludge pipe 70 is connected to the lower part of the reactor body 10. Two sets of fine filters 71 are connected in parallel on the sludge pipe 70. The two ends of the two sets of fine filters 71 are connected to the sludge pipe 70 through three-way valves 72 respectively. The two sets of fine filters 71 are configured with one in use and one on standby, which makes it convenient for operators to switch and clean the clogged filter cartridges without stopping the machine.

[0028] The oil outlet of the sludge pipe 70 is connected to the input of the circulating pump 90, and the output of the circulating pump 90 is connected to the annular spray pipe 110 through the circulating oil outlet pipe 100. The annular spray pipe 110 is horizontally fixed to the top of the interior of the reactor body 10, and its bottom has multiple nozzles 111 that are inclined downwards. The pressurized oil sprayed from the nozzles 111 forms a downward liquid curtain, which can break up the surface foam generated during the reaction.

[0029] The oil inlet of the clean oil pipe 80 is connected to the bottom of the bottom cover 43, and the end of the clean oil pipe 80 away from the bottom cover 43 is connected to a vacuum oil filter 83, which uses the principle of vacuum negative pressure to dehydrate and degas the refined oil. A bypass branch 81 is led out from the clean oil pipe 80 and connected to the input of the circulating pump 90. A one-way valve 82 is connected in series on the bypass branch 81. Since the centrifugal circulating pump relies on the pumped fluid to lubricate and cool the internal mechanical seal, operation without fluid will cause friction and dry burning. When the main flow of the dirty oil pipe 70 is insufficient due to impurities, the pressure at the input of the circulating pump 90 drops, the one-way valve 82 opens, and the circulating pump 90 can draw clean oil filtered by the filter element 42 from the bypass branch 81 for fluid compensation, maintaining the basic flow required for pump operation and effectively preventing dry burning damage.

[0030] The above description is merely illustrative of the invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined by the claims, all of which should fall within the protection scope of this invention.

Claims

1. A recycling system for waste lubricating oil from activated clay refining, comprising a reactor body (10), a stirring shaft (20) disposed inside the reactor body (10), and a drive motor (30) for driving the stirring shaft (20) to rotate, characterized in that: The bottom of the reactor body (10) is connected to a filter assembly (40), and the filter assembly (40) is provided with a filter screen hopper (41); the bottom end of the stirring shaft (20) is fixed with an anti-settling scraper (21), and the bottom of the anti-settling scraper (21) is provided with a wear-resistant strip (22), and the wear-resistant strip (22) is attached to and slides with the upper surface of the filter screen hopper (41).

2. The recycling system for waste lubricating oil from activated clay refining according to claim 1, characterized in that: The filter hopper (41) has an inverted conical structure, the anti-sedimentation scraper (21) is inclined, and the inclination angle of the anti-sedimentation scraper (21) is adapted to the inner conical surface angle of the filter hopper (41).

3. The recycling system for waste lubricating oil from activated clay refining according to claim 1, characterized in that: The filter assembly (40) includes, from top to bottom, the filter screen (41), the filter element (42), and the bottom cover (43). The bottom of the reactor body (10) is fixed with a lower flange (11), and the bottom cover (43) is detachably and sealed to the bottom of the reactor body (10) through the lower flange (11).

4. The recycling system for waste lubricating oil from activated clay refining according to claim 1, characterized in that: The reactor body (10) is provided with a clay feeding hopper (50) and a spiral feed pipe (60) above it. The upper end of the spiral feed pipe (60) is connected to the discharge port of the clay feeding hopper (50), and a spiral feeding motor (61) is provided on the spiral feed pipe (60). The lower end of the spiral feed pipe (60) penetrates the top wall of the reactor body (10) and extends into the reactor body (10).

5. The recycling system for waste lubricating oil from activated clay refining according to claim 4, characterized in that: The lower part of the stirring shaft (20) is fixedly fitted with a dispersing disc (23), which is located above the anti-settling scraper (21); the lower end of the spiral feed pipe (60) is provided with a discharge port, which is set directly opposite the dispersing disc (23).

6. The recycling system for waste lubricating oil from activated clay refining according to claim 3, characterized in that: The reactor body (10) is provided with a forced circulation loop outside. The circulation loop includes a sludge pipe (70), a clean oil pipe (80), a circulation pump (90), a circulation outlet pipe (100), and an annular spray pipe (110). The oil inlet end of the sludge pipe (70) is connected to the reactor body (10), and the oil outlet end of the sludge pipe (70) is connected to the input end of the circulation pump (90). The oil inlet end of the clean oil pipe (80) is connected to the bottom cover (43), and a bypass branch (81) is led out from the clean oil pipe (80) and connected to the input end of the circulation pump (90). The output end of the circulation pump (90) is connected to the annular spray pipe (110) through the circulation outlet pipe (100).

7. The recycling system for waste lubricating oil from activated clay refining according to claim 6, characterized in that: A one-way valve (82) is connected in series on the bypass branch (81), and two sets of fine filters (71) are connected in parallel on the sludge pipe (70). The two ends of the two sets of fine filters (71) are connected to the sludge pipe (70) through three-way valves (72).

8. The recycling system for waste lubricating oil from activated clay refining according to claim 6, characterized in that: The annular spray pipe (110) is horizontally fixed to the top of the inside of the reactor body (10), and the bottom of the annular spray pipe (110) has a plurality of nozzles (111) that are inclined downward.

9. The recycling system for waste lubricating oil from activated clay refining according to claim 1, characterized in that: The reactor body (10) has an upper flange (12) on its top. The top opening of the reactor body (10) is detachably connected to a top cover (13) through the upper flange (12). The drive motor (30) is vertically fixed above the top cover (13). The top cover (13) has an oil inlet (14).

10. The recycling system for waste lubricating oil from activated clay refining according to claim 6, characterized in that: The end of the oil purification pipe (80) away from the bottom cover (43) is connected to a vacuum oil filter (83).

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