A waste mineral oil purification wastewater treatment device

Abstract

This invention relates to the field of wastewater treatment technology, specifically disclosing a waste mineral oil purification wastewater treatment device, including a tank, a support rod, and a filter screen. A connecting rod connects the support rod to the tank. A rotating ring is located below the filter screen on the support rod, and a winding rod is rotatably connected to the rotating ring. A water spray pipe is provided on the rotating ring. The filter screen has an open annular structure, with one end connected to the connecting rod and the other end guided by the water spray pipe and connected to the winding rod. A driving structure is provided on the rotating ring, and a driving assembly is connected to the rotating ring. When the driving assembly drives the rotating ring to rotate, the driving structure drives the winding rod to rotate, so as to open and rewind the filter screen simultaneously, or close and unwind the filter screen simultaneously. When rewinding the filter screen, the water spray pipe backwashes the filter screen. This waste mineral oil purification wastewater treatment device improves the pore unobstructedness of the filter screen when reused, and improves the output water and wastewater treatment effect of the wastewater treatment equipment.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a waste mineral oil purification wastewater treatment device. Background Technology

[0002] Waste mineral oil is extracted and refined from petroleum, coal, and oil shale. During the mining, processing, and use process, external factors alter its original physical and chemical properties, rendering it unusable. Waste mineral oil purification wastewater treatment removes oil pollutants from wastewater to meet discharge standards or enable recycling. In this process, resin can serve as a treatment medium. Specific adsorption resins can be used to adsorb oil and other organic matter in the water, thereby achieving oil-water separation.

[0003] After a period of use, resin needs to be regenerated. This involves using chemicals to reverse the ion exchange reaction, restoring the functional groups of the resin to their original state for reuse. However, due to various factors such as resin type, water quality, operating conditions, and the control of the regeneration process, there will be varying degrees of resin loss after regeneration. Therefore, after a period of use, the resin needs to be completely replaced.

[0004] Chinese Patent No. CN220723761U discloses a resin replacement device, which includes: a defluorination tank having a water inlet pipe, a manhole, and a seal, wherein the water inlet pipe and the manhole are both higher than the seal; a ton box; an opening and closing unit for connecting or blocking the seal of the defluorination tank and the ton box, so that water and resin in the defluorination tank can flow to the ton box or remain in the defluorination tank; and a suction unit for sucking water and resin from the ton box into the manhole of the defluorination tank.

[0005] However, during long-term use, some dirt and impurities may accumulate on the surface of the resin. These dirt and impurities increase the adhesion of the resin, making it difficult for the resin to detach from the porous plate of the tank. The aforementioned resin replacement device uses a suction unit to suck water and resin from the tank, which cannot guarantee that the resin adhering to and clogging the porous plate will detach. This resin will clog the filter holes on the porous plate, affecting the water output of the defluorination tank. Summary of the Invention

[0006] This invention provides a waste mineral oil purification wastewater treatment device, which aims to solve the problem in related technologies where, when replacing resin, it is impossible to clean the resin adhering to and clogging the filter screen inside the tank, thus affecting the output and treatment effect of the wastewater treatment equipment.

[0007] The present invention provides a waste mineral oil purification wastewater treatment device, comprising a tank, a support rod, and a filter screen. The support rod is located inside the tank and is coaxially arranged with the tank. The filter screen is horizontally arranged between the support rod and the tank. A connecting rod connects the support rod and the tank. A rotating ring is arranged below the filter screen on the support rod. The rotating ring is rotatably connected to the support rod, and a winding rod is rotatably connected to the rotating ring. Both the connecting rod and the winding rod extend radially along the filter screen.

[0008] The rotating ring is provided with a water spray pipe parallel to the central axis of the winding rod. The filter screen is an open annular structure. One end of the filter screen is connected to the connecting rod, and the other end is connected to the winding rod after being guided by the water spray pipe. The rotating ring is provided with a drive structure for driving the winding rod to rotate, and the rotating ring is connected to a drive assembly for driving it to rotate along the outer circumference of the support rod.

[0009] When the drive assembly drives the rotating ring to rotate the winding rod and the spray pipe along the outer periphery of the support rod, the drive structure drives the winding rod to rotate so as to open the filter screen while winding the filter screen, or close the filter screen while unwinding the filter screen. When winding the filter screen, the spray pipe sprays water from the water outlet side of the filter screen to the water inlet side of the filter screen.

[0010] Beneficial effects: When resin replacement is required, the drive assembly drives the rotating ring to rotate, which in turn moves the winding rod and water spray pipe towards the open filter screen, causing the waste resin on the filter screen to fall downwards. Simultaneously, the drive structure drives the winding rod to rotate, winding up the open filter screen. During the winding process, the water spray pipe performs reverse rinsing on the filter screen, thereby washing away the resin adhering to and clogging the filter screen. This achieves filter screen cleaning without disassembling the filter screen and improves the cleaning effect of waste resin on the filter screen. In addition, during the winding process, the shape of the filter screen changes from an unfolded state to a bent state. Therefore, the resin may loosen its adhesion to the filter screen due to the change in the shape of the filter screen, making it easier for the resin to detach from the filter screen and accelerating resin shedding. This invention improves the pore unobstructedness of the filter screen when reused, and improves the output water volume and wastewater treatment effect of the wastewater treatment equipment.

[0011] Preferably, an arc-shaped cover is connected to the rotating ring, the winding rod is located inside the arc-shaped cover, and the water spray pipe is installed on the arc-shaped cover. When the filter screen is closed, the part of the filter screen at the top of the arc-shaped cover abuts against the connecting rod to form a closed annular filter screen layer.

[0012] Beneficial effects: By setting up an arc-shaped cover, the filter screen is supported, improving its stability and helping it to remain closed.

[0013] Preferably, the outer circumferential surface of the winding rod is tapered, and the diameter of the winding rod gradually decreases from the end furthest from the support rod to the end closest to the support rod.

[0014] Beneficial effects: By setting the outer circumferential surface of the winding rod to a tapered shape, the outer circumferential surface of the winding rod can fit into the filter screen during the winding process, improving the tightness of the filter screen winding.

[0015] Preferably, the filter screen is provided with reinforcing ribs extending radially at intervals, and the rotating ring is connected with supporting ribs extending vertically. The supporting ribs are distributed circumferentially along the supporting rod, and the top of the supporting ribs contacts the bottom of the filter screen to support the filter screen.

[0016] Preferably, the drive assembly includes a drive motor, a gear, and a gear ring. The drive motor is fixedly installed on the tank body. The gear is connected to the output end of the drive motor. The gear ring is embedded in the side wall of the tank body and rotatably connected to the tank body. The gear ring meshes with the gear. The rotating ring is connected to a coaxially arranged connecting ring. The connecting ring is connected to the gear ring. The drive motor drives the gear to rotate the gear ring, and the gear ring drives the rotating ring to rotate through the connecting ring.

[0017] Preferably, a scraper rod that fits against the inner wall of the tank is connected to the toothed ring, and a water spray hole is opened on the side of the scraper rod facing the rotation direction of the toothed ring. A water supply ring is coaxially arranged near the top of the support rod. An installation ring is rotatably connected to the bottom of the water supply ring. The scraper rod is connected to the installation ring, and the water spray hole on the scraper rod communicates with the interior of the water supply ring. A water storage cavity communicating with the interior of the scraper rod is opened on the toothed ring, and the water spray pipe is connected to the water storage cavity.

[0018] Beneficial effects: By setting up a scraper, the scraper rotates synchronously when the gear ring rotates. The scraper scrapes off the resin adhering to the inner wall of the tank. At the same time, water is sprayed onto the inner wall of the tank through the water spray hole, causing the resin on the inner wall to fall off quickly, thus improving the cleaning effect of waste resin on the inner wall of the tank.

[0019] Preferably, the outer periphery of the support rod is connected to a water spray ring that communicates with the water supply ring, and the bottom of the water spray ring is provided with a second water spray hole that sprays water toward the outer wall of the support rod.

[0020] Preferably, the scraper bar is spirally arranged from top to bottom toward the side opposite to the rotation direction of the gear ring.

[0021] Preferably, a spring block is elastically connected to the side of the gear ring facing the rotating ring. A limiting hole adapted to the spring block is provided on the connecting ring. A first stop bar is connected to the rotating ring, and a second stop bar is connected to the support rod. The gear ring drives the rotating ring to rotate through the cooperation of the spring block and the limiting hole. When the first stop bar abuts against the first side of the second stop bar, the filter screen is in a fully open state. As the gear ring continues to rotate, the spring block disengages from the limiting hole, and the gear ring disengages from the connecting ring.

[0022] Preferably, the support rod is fitted with a feed pipe, the feed pipe has a feed inlet 1, and the support rod has a feed inlet 2 that is compatible with the feed inlet 1. When the feed pipe is rotated until the feed inlet 1 and the feed inlet 2 are opposite each other, the resin in the feed pipe enters the filter screen from the feed inlet 1 and the feed inlet 2. The scraper rod is connected to a spreading rod, which extends radially along the tank body.

[0023] Beneficial effects: By setting up a spreading rod, after new resin enters above the filter screen, the spreading rod is driven to rotate by the toothed ring, and the spreading rod spreads the new resin evenly on the filter screen, thereby making the resin spreading thickness more uniform.

[0024] The beneficial effects of this invention are as follows: By winding up the filter screen and backwashing it during the winding process, this invention achieves filter screen cleaning without disassembling it, and improves the cleaning effect of waste resin on the filter screen; in addition, during the winding process, the shape of the filter screen changes from an unfolded state to a bent state, so the resin will loosen its adhesion to the filter screen due to the change in the shape of the filter screen, making it easier for the resin to detach from the filter screen and accelerating resin shedding; this invention improves the unobstructedness of the filter pores when the filter screen is reused, and improves the output water volume and wastewater treatment effect of the wastewater treatment equipment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 This is a cross-sectional view of the present invention.

[0027] Figure 3 This is a schematic diagram illustrating the structure of the driving component of the present invention.

[0028] Figure 4 This is a structural schematic diagram illustrating the connection relationship between the filter screen and the support rod according to the present invention.

[0029] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle.

[0030] Figure 6 This is a structural schematic diagram illustrating the connection relationship between the toothed ring and the scraper rod according to the present invention.

[0031] Figure 7 This is a cross-sectional view illustrating the connection relationship between the support rod and the water conveying ring according to the present invention.

[0032] Figure 8 This is a cross-sectional view illustrating the connection relationship between the gear ring and the connecting ring according to the present invention.

[0033] Figure label:

[0034] 1. Tank body; 11. Cover; 12. Inlet; 13. Door; 2. Support rod; 21. Mounting groove; 22. Second baffle; 23. Second feed inlet; 3. Filter screen; 31. Connecting rod; 32. Reinforcing rib; 4. Rotating ring; 41. Winding rod; 42. Water spray pipe; 43. Mounting rod; 44. Connecting ring; 45. Arc-shaped cover; 46. Supporting rib; 47. Limiting hole; 48. First baffle; 5. Drive motor; 51. Gear; 52. Gear ring; 53. Water storage chamber; 6. Scraper rod; 61. First water spray hole; 7. Water conveying ring; 71. Mounting ring; 72. Water spray ring; 73. Second water spray hole; 8. Spring block; 9. Feed pipe; 91. First feed inlet; 10. Spreading rod. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] like Figures 1 to 8 As shown, the waste mineral oil purification wastewater treatment device of the present invention includes a tank 1, a support rod 2 vertically arranged inside the tank 1, and four filter screens 3 vertically spaced evenly inside the tank 1. The support rod 2 is coaxially arranged with the tank 1, and the four filter screens 3 are horizontally arranged between the support rod 2 and the tank 1, forming four spaces for placing resin inside the tank 1. A cover 11 is provided on the top of the tank 1, and an inlet 12 is provided on the cover 11. An outlet (not shown in the figure) is provided on the bottom of the tank 1. Wastewater enters the tank 1 through the inlet 12, is purified by four layers of resin, and is discharged from the outlet.

[0037] like Figures 3 to 5 As shown, a connecting rod 31 is fixedly connected between the support rod 2 and the tank 1. A rotating ring 4 is located below the filter screen 3 on the support rod 2. An installation groove 21 is provided on the outer periphery of the support rod 2, and the rotating ring 4 is rotatably connected to the installation groove 21. A winding rod 41 is rotatably connected to the rotating ring 4. Both the connecting rod 31 and the winding rod 41 extend radially along the filter screen 3. A water spray pipe 42 parallel to the central axis of the winding rod 41 is also provided on the rotating ring 4. A water outlet hole (not shown in the figure) is provided on the water spray pipe 42.

[0038] The filter screen 3 has an open annular structure. One end of the filter screen 3 is fixedly connected to the connecting rod 31, and the other end is guided by the water spray pipe 42 and fixedly connected to the winding rod 41. The rotating ring 4 is equipped with a drive structure to drive the winding rod 41 to rotate. As an example, the drive structure is an electric motor, and the output end of the electric motor is fixedly connected to the winding rod 41. The electric motor drives the winding rod 41 to rotate, thereby achieving the winding and unwinding of the filter screen 3. The rotating ring 4 is connected to a drive assembly that drives it to rotate along the outer circumference of the support rod 2.

[0039] During wastewater treatment, filter screen 3 forms a closed structure between support rod 2 and the inner wall of tank 1, with resin placed above each layer of filter screen 3. When resin replacement is required, the drive assembly drives rotating ring 4 to rotate. Rotating ring 4 drives winding rod 41 and water spray pipe 42 to move in the direction of opening filter screen 3, causing the waste resin above filter screen 3 to fall downwards. At the same time, the drive structure drives winding rod 41 to rotate, winding up the opened filter screen 3. During the winding process, water is sprayed onto filter screen 3 through water spray pipe 42. When filter screen 3 is in normal use, the side facing the resin is defined as the water inlet side, and the side away from the resin is defined as the water outlet side. Water in water spray pipe 42 is sprayed from the water outlet side of filter screen 3 to the water inlet side of filter screen 3, thereby washing away the resin adhering to and clogging the filter screen 3. Finally, all the waste resin falls to the bottom of tank 1. A door 13 is provided on the side wall of tank 1 near the bottom. By opening door 13, the waste resin accumulated at the bottom of tank 1 can be extracted or cleaned.

[0040] This invention achieves cleaning of the filter screen 3 without disassembling it by rewinding the filter screen 3 and performing reverse rinsing during the rewinding process. This also improves the cleaning effect on waste resin on the filter screen 3. Furthermore, during the rewinding process, the shape of the filter screen 3 changes from an unfolded state to a bent state. Therefore, the resin adhesion between the filter screen 3 and the screen 3 may loosen due to this change in shape, making it easier for the resin to detach and accelerating resin shedding. This invention improves the pore patency of the filter screen 3 when reused, thereby improving the effluent flow and wastewater treatment effect of the wastewater treatment equipment.

[0041] like Figures 2 to 5 As shown, the drive assembly includes a drive motor 5, a gear 51, and a gear ring 52. The drive motor 5 is fixedly mounted on the tank body 1. The gear 51 is fixedly connected to the output end of the drive motor 5. The gear ring 52 is embedded in the side wall of the tank body 1 and rotatably connected to the tank body 1, meshing with the gear 51. A connecting ring 44 is coaxially connected to the rotating ring 4 via a mounting rod 43. The connecting ring 44 is connected to the gear ring 52. The drive motor 5 drives the gear 51 to rotate the gear ring 52, and the gear ring 52 drives the rotating ring 4 to rotate via the connecting ring 44. When the gear ring 52 drives the rotating ring 4 to rotate in the direction of opening the filter screen 3, the drive structure drives the winding rod 41 to wind up the filter screen 3. When the gear ring 52 drives the rotating ring 4 to rotate in the direction of closing the filter screen 3, the drive structure drives the winding rod 41 to unwind the filter screen 3.

[0042] An arc-shaped cover 45 is fixedly connected to the mounting rod 43 of the rotating ring 4. The winding rod 41 is located inside the arc-shaped cover 45, and the water spray pipe 42 is installed on the arc-shaped cover 45. When the filter screen 3 is closed, the part of the filter screen 3 located at the top of the arc-shaped cover 45 abuts against the connecting rod 31 to form a closed annular filter screen 3 layer. At the same time, the arc-shaped cover 45 provides support for the filter screen 3, improving the stability of the filter screen 3.

[0043] The filter screen 3 is provided with reinforcing ribs 32 extending radially at intervals. A vertically extending support rib 46 is fixedly connected to the rotating ring 4. The support ribs 46 are distributed circumferentially along the support rod 2, with the top of the support rib 46 contacting the bottom of the filter screen 3 to support the filter screen 3 and ensure its stability during normal use. It is understood that, to avoid interference between the reinforcing ribs 32 and the support ribs 46, the bottom of the reinforcing rib 32 is flush with the bottom of the filter screen 3, or the cross-section of the reinforcing rib 32 is an inverted isosceles trapezoidal structure.

[0044] The outer circumferential surface of the winding rod 41 is a tapered surface (not shown in the figure), and the diameter of the winding rod 41 gradually decreases from the end away from the support rod 2 to the end closer to the support rod 2, so as to improve the tightness of winding the filter screen 3 during the winding process.

[0045] like Figure 2 , Figure 3 and Figure 6 As shown, since the resin is in contact with the inner wall of the tank 1 for a long time, it may adhere to the inner wall of the tank 1 and be difficult to remove. In order to better clean the resin on the inner wall of the tank 1, in this embodiment, a scraper rod 6 is fixedly connected to the toothed ring 52 and fits against the inner wall of the tank 1. A water spray hole 61 is opened on the side of the scraper rod 6 facing the rotation direction of the toothed ring 52. The water spray hole 61 sprays water onto the inner wall of the tank 1. When the toothed ring 52 rotates, it will drive the scraper rod 6 to rotate synchronously. While the scraper rod 6 scrapes off the resin adhering to the inner wall of the tank 1, the water spray hole 61 sprays water onto the inner wall of the tank 1, so that the resin on the inner wall falls off quickly, improving the cleaning effect of waste resin on the inner wall of the tank 1.

[0046] Since the tank 1 in this embodiment is equipped with four filter screens 3, in order to reduce production costs, the scraper rods 6 between two adjacent filter screens 3 are fixedly connected and communicate with each other, and the toothed rings 52 corresponding to the two adjacent filter screens 3 are connected through the scraper rods 6. Driving only one toothed ring 52 to rotate can drive all the toothed rings 52 to rotate synchronously.

[0047] like Figure 3 and Figure 7 As shown, a water supply ring 7 is fixedly connected to the support rod 2 near the top, and the water supply ring 7 is connected to an external water supply source. An installation ring 71 is rotatably connected to the bottom of the water supply ring 7. The scraper rod 6 corresponding to the filter screen 3 at the top is fixedly connected to the installation ring 71, and the water spray hole 61 on the scraper rod 6 is connected to the inside of the water supply ring 7. The scraper rod 6 is spirally arranged from top to bottom in a direction away from the rotation direction of the toothed ring 52. As the scraper rod 6 rotates with the toothed ring 52, the scraper rod 6 pushes the scraped waste resin downward, further accelerating the removal of waste resin from the inner wall of the tank 1, so that the waste resin falls quickly to the bottom of the tank 1.

[0048] A water spray ring 72, which communicates with a water supply ring 7, is fixedly connected to the outer periphery of the support rod 2. The bottom of the water spray ring 72 is provided with a second water spray hole 73 that sprays water toward the outer wall of the support rod 2. Water is sprayed onto the outer wall of the support rod 2 through the second water spray hole 73 to clean the waste resin on the outer wall of the support rod 2.

[0049] like Figure 5 and Figure 8 As shown, a water storage chamber 53 is provided on the toothed ring 52, which communicates with the inside of the scraper rod 6, and the water spray pipe 42 is connected to the corresponding water storage chamber 53. The water spray pipe 42 and the scraper rod 6 share the same water source, which saves the cost of setting up a separate water source, and makes the structure inside the wastewater treatment equipment more compact, reducing the space occupied inside the tank 1.

[0050] To improve the cleaning effect on the waste resin on the inner wall of the tank 1, in this embodiment, a spring block 8 is elastically connected to the side of the gear ring 52 facing the rotating ring 4. The part of the spring block 8 exposed outside the gear ring 52 is hemispherical, and a limiting hole 47 adapted to the spring block 8 is provided on the connecting ring 44. A first stop bar 48 is fixedly connected to the rotating ring 4, and a second stop bar 22 is fixedly connected to the support rod 2. The toothed ring 52 drives the connecting ring 44 and the rotating ring 4 to rotate through the cooperation of the spring block 8 and the limiting hole 47. When the first baffle 48 abuts against the first side of the second baffle 22, the filter screen 3 is in a fully open state. At this time, due to the stop of the first baffle 48 and the second baffle 22, the rotating ring 4 cannot continue to rotate with the toothed ring 52. The spring block 8 on the toothed ring 52 will be squeezed out of the limiting hole 47 under the pressure of the edge of the limiting hole 47. The toothed ring 52 is disconnected from the connection with the connecting ring 44. The toothed ring 52 continues to drive the scraper rod 6 to clean the waste resin on the inner wall of the tank 1.

[0051] After cleaning is completed, the drive motor 5 drives the gear 51 to drive the gear ring 52 to rotate in the opposite direction. When the spring block 8 is aligned with the limiting hole 47, it is pushed into the limiting hole 47 and drives the connecting ring 44 and the rotating ring 4 to rotate in the direction of closing the filter screen 3. During the rotation, the drive structure drives the winding rod 41 to unwind. When the first baffle 48 on the rotating ring 4 abuts against the second side of the second baffle 22, the closure of the filter screen 3 is completed.

[0052] like Figure 2 , Figure 3 , Figure 5 and Figure 8As shown, a feed pipe 9 is inserted through the support rod 2. The feed pipe 9 has a feed inlet 91, and the support rod 2 has a feed inlet 23 that matches the feed inlet 91. When the feed pipe 9 is rotated until the feed inlet 91 and feed inlet 23 are opposite each other, the resin in the feed pipe 9 enters above the filter screen 3 through the feed inlet 91 and feed inlet 23, thus replacing the resin. A spreading rod 10 is fixedly connected to the scraper rod 6, extending radially along the tank body 1. After closing the filter screen 3, the gear ring 52 continues to rotate in the direction of closing the filter screen 3. Due to the stops of the first baffle 48 and the second baffle 22, the rotating ring 4 cannot continue to rotate with the gear ring 52. The spring block 8 on the gear ring 52 disengages again from the limiting hole 47 of the connecting ring 44. The gear ring 52 drives the spreading rod 10 to spread the new resin evenly on the filter screen 3, thus making the resin spreading thickness more uniform.

[0053] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element 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.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A waste mineral oil purification wastewater treatment device, comprising a tank (1), a support rod (2), and a filter screen (3), wherein the support rod (2) is located inside the tank (1) and coaxially arranged with the tank (1), and the filter screen (3) is horizontally arranged between the support rod (2) and the tank (1), characterized in that, A connecting rod (31) is connected between the support rod (2) and the tank (1). A rotating ring (4) is provided below the filter screen (3) on the support rod (2). The rotating ring (4) is rotatably connected to the support rod (2), and a winding rod (41) is rotatably connected to the rotating ring (4). Both the connecting rod (31) and the winding rod (41) extend radially along the filter screen (3). The rotating ring (4) is provided with a water spray pipe (42) parallel to the central axis of the winding rod (41). The filter screen (3) is an open ring structure. One end of the filter screen (3) is connected to the connecting rod (31), and the other end is connected to the winding rod (41) after being guided by the water spray pipe (42). The rotating ring (4) is provided with a driving structure for driving the winding rod (41) to rotate, and the rotating ring (4) is connected with a driving component for driving it to rotate along the outer periphery of the support rod (2). When the drive assembly drives the rotating ring (4) to rotate the winding rod (41) and the spray pipe (42) along the outer periphery of the support rod (2), the drive structure drives the winding rod (41) to rotate so as to open the filter screen (3) while winding the filter screen (3), or close the filter screen (3) while unwinding the filter screen (3). When winding the filter screen (3), the spray pipe (42) sprays water from the water outlet side of the filter screen (3) to the water inlet side of the filter screen (3). The drive assembly includes a drive motor (5), a gear (51) and a gear ring (52). The drive motor (5) is fixedly installed on the tank body (1). The gear (51) is connected to the output end of the drive motor (5). The gear ring (52) is embedded in the side wall of the tank body (1) and rotatably connected to the tank body (1). The gear ring (52) meshes with the gear (51). The rotating ring (4) is connected to a coaxially arranged connecting ring (44). The connecting ring (44) is connected to the gear ring (52). The drive motor (5) drives the gear (51) to rotate the gear ring (52). The gear ring (52) drives the rotating ring (4) to rotate through the connecting ring (44). The toothed ring (52) is connected to a scraper rod (6) that fits against the inner wall of the tank (1), and a water spray hole (61) is opened on the side of the scraper rod (6) facing the rotation direction of the toothed ring (52). A water conveying ring (7) is connected to the support rod (2) near the top. An installation ring (71) is rotatably connected to the bottom of the water conveying ring (7). The scraper rod (6) is connected to the installation ring (71), and the water spray hole (61) on the scraper rod (6) is connected to the inside of the water conveying ring (7). A water storage cavity (53) is opened on the toothed ring (52) that is connected to the inside of the scraper rod (6), and the water spray pipe (42) is connected to the water storage cavity (53).

2. The waste mineral oil purification wastewater treatment device according to claim 1, characterized in that, An arc-shaped cover (45) is connected to the rotating ring (4). The winding rod (41) is located inside the arc-shaped cover (45). The water spray pipe (42) is installed on the arc-shaped cover (45). When the filter screen (3) is closed, the part of the filter screen (3) located at the top of the arc-shaped cover (45) abuts against the connecting rod (31) to form a closed annular filter screen (3) layer.

3. The waste mineral oil purification wastewater treatment device according to claim 1, characterized in that, The outer circumferential surface of the winding rod (41) is tapered, and the diameter of the winding rod (41) gradually decreases from the end away from the support rod (2) to the end closer to the support rod (2).

4. A waste mineral oil purification wastewater treatment device according to claim 1, characterized in that, The filter screen (3) is provided with reinforcing ribs (32) extending radially at intervals, and the rotating ring (4) is connected with supporting ribs (46) extending vertically. The supporting ribs (46) are distributed circumferentially along the supporting rod (2), and the top of the supporting ribs (46) contacts the bottom of the filter screen (3) to support the filter screen (3).

5. A waste mineral oil purification wastewater treatment device according to claim 1, characterized in that, The outer periphery of the support rod (2) is connected to a water spray ring (72) that communicates with the water conveying ring (7). The bottom of the water spray ring (72) is provided with a second water spray hole (73) that sprays water toward the outer wall of the support rod (2).

6. A waste mineral oil purification wastewater treatment device according to claim 1, characterized in that, The scraper bar (6) is spirally arranged from top to bottom toward the side opposite to the rotation direction of the toothed ring (52).

7. A waste mineral oil purification wastewater treatment device according to claim 1, characterized in that, The toothed ring (52) is elastically connected to a spring block (8) on the side facing the rotating ring (4). The connecting ring (44) has a limiting hole (47) adapted to the spring block (8). The rotating ring (4) is connected to a first stop bar (48), and the support rod (2) is connected to a second stop bar (22). The toothed ring (52) drives the rotating ring (4) to rotate through the cooperation of the spring block (8) and the limiting hole (47). When the first stop bar (48) abuts against the first side of the second stop bar (22), the filter screen (3) is in a fully open state. As the toothed ring (52) continues to rotate, the spring block (8) is dislodged from the limiting hole (47), and the toothed ring (52) is disengaged from the connecting ring (44).

8. A waste mineral oil purification wastewater treatment device according to claim 1, characterized in that, The support rod (2) is fitted with a feed pipe (9), and the feed pipe (9) has a feed inlet 1 (91). The support rod (2) has a feed inlet 2 (23) that is compatible with the feed inlet 1 (91). When the feed pipe (9) is rotated to the point where the feed inlet 1 (91) and the feed inlet 2 (23) are opposite each other, the resin in the feed pipe (9) enters the filter screen (3) from the feed inlet 1 (91) and the feed inlet 2 (23). The scraper rod (6) is connected to a spreading rod (10), which extends radially along the tank body (1).

Images