Harmless purification combined device and method for waste grease

Abstract

The invention relates to the related technical field of waste grease treatment, and particularly discloses a waste grease harmless purification combined device and method.The waste grease harmless purification combined device comprises a heating cylinder, a rough filtration assembly and a fine filtration assembly, an acidification reaction tank is arranged on the right side of the heating cylinder, and the rough filtration assembly is arranged on the upper portion in the heating cylinder; the refined filtration assembly is arranged below the coarse filtration assembly and located in the heating cylinder, double filtration operation is carried out through the combination of the coarse filtration assembly and the refined filtration assembly, the refined filtration assembly discharges filtered grease into the acidification reaction tank, and orderly operation of filtration and acidification is carried out. According to the harmless purification combined device and method for the waste grease, the use requirement of double filtration is met through combination of rough filtration and fine filtration, the filtration efficiency is effectively improved, in addition, the use requirement of automatic cleaning of filtered impurities is met, solid impurities are squeezed during cleaning, and grease waste is effectively reduced.

Description

Technical Field

[0001] This invention relates to the technical field of waste oil treatment, and more particularly to the technical field of waste oil purification treatment, specifically a combined device and method for the harmless purification of waste oil. Background Technology

[0002] Waste oil, as a renewable resource, mainly refers to inedible animal and vegetable oils and oil-water mixtures generated in catering services and food processing. In order to prevent waste oil from being discharged into sewers at will, causing environmental damage and resource waste, and in order to convert waste oil into green energy such as biodiesel and sustainable aviation fuel through professional treatment, it is necessary to recycle waste oil. Waste oils after recycling usually contain a large number of solid impurities. Therefore, when purifying waste oils to render them harmless, a series of treatments are required, including filtration pretreatment, acidification pre-esterification, alkali-catalyzed transesterification, and purification.

[0003] For example, Chinese patent CN108624407B discloses a waste oil purification and treatment device. The outer wall of the filter inner cylinder is provided with multiple filter holes I. A power mechanism simultaneously rotates the stirring and separation mechanism and the transmission mechanism. The transmission mechanism drives the compression mechanism to squeeze sulfuric acid into the filter inner cylinder. The stirring and separation mechanism draws the waste oil into the filter inner cylinder and stirs and mixes the waste oil with sulfuric acid. The waste oil is acidified. The stirring and separation mechanism pushes the sediment and garbage in the acidified waste oil into the collection box. A portion of the acidified oil flows out through the filter holes I provided on the filter inner cylinder, and a portion of the acidified oil flows out through the filter holes II provided on the waste baffle.

[0004] Based on the aforementioned patents and in conjunction with existing solutions and actual production and processing applications, current waste oil purification and filtration devices still have some problems, such as: In the aforementioned patent, waste oil is acidified simultaneously during purification and filtration. This operation method, in which the filtration process and the acidification process are carried out together, makes it easy for the oil to be filtered out prematurely before the acidification reaction is completed or the acid residue is completely precipitated. In addition, solid impurities in waste oil can also interfere with the acidification reaction or consume acid, making it impossible to ensure the efficient progress of the acidification reaction. The filtration method described in the aforementioned patent relies solely on a single filtration structure—the inner filter cylinder—to filter solid impurities from waste oil. This is similar to existing waste oil filtration methods that use a single filter screen. Both methods are too simplistic, only meeting the requirements for coarse filtration and failing to achieve further fine filtration, thus reducing overall filtration efficiency.

[0005] Therefore, we propose a combined device and method for the harmless purification of waste oil to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a combined device and method for the harmless purification of waste oil, in order to solve the problem that the filtration methods proposed in the background art are too simple, can only meet the needs of coarse filtration, cannot achieve further fine filtration, and reduce the overall filtration efficiency.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a combined device for the harmless purification of waste oil, comprising: A heating cylinder is provided with a feed pipe for injecting waste oil at its upper end, and an acidification reaction tank is provided to the right of the heating cylinder. Also includes: A coarse filter assembly, wherein the coarse filter assembly is disposed in the upper part of the heating cylinder; A fine filter assembly is placed below the coarse filter assembly and inside the heating cylinder, and a dual filtration operation is performed through the combination of the coarse filter assembly and the fine filter assembly; The fine filtration component discharges the filtered oil into the acidification reaction tank for an orderly operation of filtration followed by acidification.

[0008] Preferably, the coarse filter assembly includes a circular basin frame fixed inside the heating cylinder and a first filter plate fixed at a through hole in the circular basin frame. The circular basin frame has an integrated truncated cone portion at its center, and a sludge collection ring groove is provided at the connection between the truncated cone portion and the bottom of the basin frame. A second filter plate is fixed at a through hole in the sludge collection ring groove.

[0009] Preferably, a material-pushing component is rotatably connected inside the circular basin frame, and the material-pushing component is slidably attached to the first filter plate. The material-pushing component is used to concentrate and agitate the filtered impurities. The feeding component is fixedly connected to the main shaft that is rotatably connected to the inner cylinder cover of the heating cylinder.

[0010] Preferably, the fine filtration assembly includes a filter cylinder fixedly connected to a heating cylinder, a cylinder cover threadedly fixed to the cylinder opening of the filter cylinder, and a pressure rod movably inserted into the filter cylinder. A filter element is mounted inside the cylinder cover by a pressure plate, and the pressure plate is threadedly fixed to the cavity opening of the cylinder cover. The pressure rod forms a reciprocating sliding structure inside the filter cylinder. The filter press cylinder is connected to the oil collecting ring groove, and the oil collecting ring groove is covered and fixed to the lower side of the round basin frame.

[0011] Preferably, the pressure rod is rotatably connected to the right end of the connecting rod, and the left end of the connecting rod is rotatably connected to the crankshaft. The crankshaft is fixed to the lower end of the auxiliary shaft, and the crankshaft and the auxiliary shaft form a coaxial rotation structure within the heating cylinder. The secondary shaft is connected to the truncated cone section by rotation.

[0012] Preferably, the auxiliary shaft and the main shaft are driven by a drive mechanism to form an opposite rotation structure. The drive mechanism includes a motor frame fixed to the inner cover of the heating cylinder, a secondary first bevel gear rotatably connected to the lower side of the motor frame, and a secondary second bevel gear rotatably connected to the upper side of the motor frame. The secondary first bevel gear and the secondary second bevel gear are respectively fixed to the upper end of the main shaft and the upper end of the auxiliary shaft. The secondary second bevel gear and the secondary first bevel gear are respectively meshed on the upper and lower sides of the main bevel gear, and the main bevel gear forms a rotation structure on the left side of the motor frame by being driven by a reduction motor.

[0013] Preferably, a linkage frame is fixedly connected to the middle of the secondary shaft, and a cleaning component capable of automatically cleaning the impurities collected in the sludge collection ring groove is inclinedly arranged on the linkage frame. The cleaning component is mirror-shaped about the vertical central axis of the linkage frame, and the cleaning component forms a synchronous rotation structure with the secondary shaft in the sludge collection ring groove. The cleaning assembly includes a cleaning pipe fixed to a linkage frame and a screw rod for conveying and pressing impurities within the cleaning pipe. The discharge pipe at the upper end of the cleaning pipe is connected to a sludge discharge ring pipe located on the truncated cone section by an insertion method. The sludge discharge ring pipe is used to discharge the impurities after cleaning and pressing. An integrated scraper is inclinedly provided at the feed inlet at the lower end of the cleaning pipe, and the scraper is slidably connected to the wall of the sludge collection ring groove. The scraper is used to scoop up the impurities collected in the sludge collection ring groove.

[0014] Preferably, the spiral depth of the spiral rod gradually decreases from bottom to top, and a movable bevel gear is fixedly connected to the upper end of the spiral rod. The movable bevel gear meshes with a stationary bevel gear fixed to the truncated cone portion, and the spiral rod forms a rotating structure inside the cleaning tube.

[0015] The present invention provides another technical solution, which is a combined device and method for the harmless purification of waste oil, the method comprising the following steps: Step 1: After the waste oil is injected into the heating cylinder, it undergoes preliminary coarse filtration through the coarse filter assembly; Step 2: When the coarse filter component performs preliminary coarse filtration of waste oil, the cleaning component automatically cleans the large solid particles filtered out by the coarse filter. Step 3: After coarse filtration, the waste oil enters the fine filtration assembly through the oil collection ring groove, where it undergoes further fine filtration. Step 4: After coarse and fine filtration, the waste oil is injected into the acidification reaction tank for acidification treatment.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: the waste oil harmless purification combination device and method utilizes a combination of coarse filtration and fine filtration to achieve the dual filtration requirements, effectively improving filtration efficiency. In addition, it meets the requirements for automatic cleaning of filtered impurities, and simultaneously presses solid impurities during the cleaning process, reducing oil waste. 1. The fine filter component is located below the coarse filter component. After the waste oil is initially coarsely filtered by the coarse filter component, the fine filter component further refines the filtered oil. Unlike the single filtration method in the existing waste oil purification process, the combination of coarse and fine filtration achieves the dual filtration requirement, effectively improving filtration efficiency. Furthermore, during the filtration operation, the coarse filter assembly drives the material feeding component to rotate within the circular frame via the main shaft. Through the sliding contact between the arc plate portion of the material feeding component and the first filter plate, the filtered solid impurities are easily moved and dispersed, preventing the first filter plate from becoming clogged. In addition, the material feeding component, in conjunction with the dirt collection ring groove, easily peels the filtered solid impurities off the first filter plate and concentrates them in the dirt collection ring groove. Furthermore, both the coarse filter and the fine filter are housed inside a heating cylinder. The heating cylinder keeps the waste oil in a liquid state, improves its fluidity, and prevents the fat in the waste oil from solidifying into lumps at low temperatures, which would cause blockage of the coarse filter and the fine filter and affect the purification effect. 2. The scraper is set to fit against the inclined wall of the collection ring trough. After the cleaning pipe rotates, the scraper shovels the solid impurities collected in the collection ring trough into the cleaning pipe. The solid impurities in the cleaning pipe are then transported and discharged by the screw rod, which meets the requirements for automatic cleaning of filtered impurities. At the same time, the solid impurities are pressed during the cleaning process to reduce oil waste. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of Embodiment 1 of the present invention; Figure 2 This is a frontal cross-sectional view of the present invention. Figure 3 This is a top view of the coarse filter assembly of the present invention assembled inside the heating cylinder; Figure 4 This is a bottom cross-sectional view of the connection between the coarse filter assembly and the oil collecting ring groove of the present invention; Figure 5This is a top cross-sectional view of the fine filtration assembly of the present invention assembled inside the heating cylinder; Figure 6 This is a front view cross-sectional structural diagram of the fine filtration component of the present invention; Figure 7 This is a front cross-sectional view of the drive mechanism of the present invention, which drives the main shaft and the auxiliary shaft to operate. Figure 8 This is a front view cross-sectional structural diagram of the drive mechanism of the present invention; Figure 9 This is a schematic diagram of Embodiment 2 of the present invention; Figure 10 This is a bottom cross-sectional view of the cleaning component of the present invention assembled inside a circular basin frame; Figure 11 For the present invention Figure 10 Enlarged structural diagram at point A in the middle; Figure 12 This is a frontal cross-sectional view of the cleaning component of the present invention.

[0018] In the diagram: 1. Heating cylinder; 2. Feed pipe; 3. Acidification reaction tank; 4. Coarse filter assembly; 5. Fine filter assembly; 6. Circular basin frame; 601. Conical truncated section; 7. First filter plate; 8. Sludge collection ring groove; 9. Second filter plate; 10. Feeding component; 11. Main shaft; 12. Filter press cylinder; 13. Cylinder cover; 1301. Pressure plate; 14. Pressure rod component; 15. Filter element; 16. Oil collection ring groove; 17. Connecting rod; 18. Crankshaft; 19. Secondary shaft; 20. Drive mechanism; 21. Motor frame; 22. Secondary first bevel gear; 23. Secondary second bevel gear; 24. Main bevel gear; 25. Gearbox; 26. Linkage frame; 27. Cleaning assembly; 28. Cleaning pipe; 29. ​​Spiral rod; 30. Sludge discharge ring pipe; 31. Scraper; 32. Moving bevel gear; 33. Stationary bevel gear. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Example 1:

[0020] This invention provides a technical solution: a combined device for the harmless purification of waste oil, which addresses the problem that the single filtration method in the existing harmless purification of waste oil can only achieve the use of coarse filtration and cannot achieve further fine filtration, thus reducing the overall filtration efficiency. First, the waste oil is initially coarsely filtered by the coarse filtration component 4, and then the coarsely filtered oil is further finely filtered by the fine filtration component 5. The combination of coarse and fine filtration achieves the use of dual filtration.

[0021] This technical solution: Please refer to Figures 1-8 A waste oil harmless purification combined device includes a heating cylinder 1. A triangular bracket is welded and fixed to the bottom of the heating cylinder 1 for horizontal placement. A feed pipe 2 for injecting waste oil is provided at the upper end of the heating cylinder 1. An acidification reaction tank 3 is provided on the right side of the heating cylinder 1 (the acidification reaction tank 3 is prior art and is not described in detail in the accompanying drawings). It also includes a coarse filter assembly 4 and a fine filter assembly 5. The coarse filter assembly 4 is used for the initial coarse filtration of large particulate solid impurities in waste oil. The coarse filter assembly 4 is located in the upper part of the heating cylinder 1 and is positioned below the feed pipe 2. The fine filter assembly 5 is used for further fine filtration of small particulate solid impurities in the oil after coarse filtration. The fine filter assembly 5 is located below the coarse filter assembly 4 and in the lower part of the heating cylinder 1. The combination of the coarse filter assembly 4 and the fine filter assembly 5 performs a dual filtration operation. The fine filter assembly 5 discharges the filtered oil into the acidification reaction tank 3 for an orderly operation of filtration followed by acidification.

[0022] Specifically, in this technical solution, the drive mechanism 20 drives the main shaft 11 and the auxiliary shaft 19 to rotate in opposite directions, according to... Figure 2 , Figure 7 and Figure 8 As shown, the drive mechanism 20 includes a motor frame 21, a primary bevel gear 22, and a secondary bevel gear 23. The motor frame 21 has a frame-like structure and is fixedly connected to the middle position of the inner cover of the heating cylinder 1 by bolts. Since the center position of the main bevel gear 24 is provided with an integrated shaft column, and a bearing is fixedly engaged on the shaft column, the main bevel gear 24 is placed in the frame cavity of the motor frame 21. The shaft column and bearing are movably inserted into the left frame cavity wall of the motor frame 21. Since the reduction motor 25 is fixedly installed on the left frame wall of the motor frame 21 by bolts, and its output end is inserted into and engaged in the shaft column of the main bevel gear 24, the reduction motor 25 is started to operate, so that the main bevel gear 24 forms a rotating structure on the left frame cavity wall of the motor frame 21. Because the secondary bevel gear 22 has an integrated shaft tube at its center, with a bearing fixedly fastened to it, the secondary bevel gear 22 is positioned within the frame cavity of the motor frame 21. The shaft tube, along with the bearing, is movably inserted into the lower frame cavity wall of the motor frame 21, and the secondary bevel gear 22 is vertically meshed with the lower side of the main bevel gear 24. Similarly, because the secondary bevel gear 23 has an integrated shaft column at its center, with a bearing fixedly fastened to it, the secondary bevel gear 23 is positioned within the frame cavity of the motor frame 21, and the shaft column... The bearing is movably inserted into the upper frame cavity wall of the motor frame 21, and the secondary second bevel gear 23 is meshed with the upper side of the main bevel gear 24 in a vertical state. When the main bevel gear 24 is driven to rotate, through the meshing action between the main bevel gear 24, the secondary first bevel gear 22 and the secondary second bevel gear 23, the secondary first bevel gear 22 forms a rotating structure on the lower frame cavity wall of the motor frame 21, and the secondary second bevel gear 23 forms a rotating structure on the upper frame cavity wall of the motor frame 21. That is, the main bevel gear 24 can drive the secondary first bevel gear 22 and the secondary second bevel gear 23 to rotate simultaneously. Since the first bevel gear 22 is connected to the main shaft 11, the upper end of the main shaft 11 extends outward through the central shaft tube of the first bevel gear 22, and the central shaft tube of the first bevel gear 22 is sleeved and fixedly connected to the upper end of the main shaft 11 by bolts. When the first bevel gear 22 is driven to rotate, it drives the main shaft 11 to form a synchronous rotation structure. Since the second bevel gear 23 is connected to the secondary shaft 19, the upper end of the secondary shaft 19 is inserted and fixedly connected to the shaft column of the second bevel gear 23 by bolts. When the second bevel gear 23 is driven to rotate, it drives the secondary shaft 19 to form a synchronous rotation structure. According to the above, when the first bevel gear 22 and the second bevel gear 23 rotate at the same time, the main shaft 11 and the secondary shaft 19 rotate simultaneously. Since the main shaft 11 is designed as a cylindrical tube, bearings are fixedly attached to both the upper and lower ends of the tube. After the auxiliary shaft 19 is connected to the main shaft 11, the main shaft 11, along with the bearings, is movably sleeved together with the auxiliary shaft 19, so that the auxiliary shaft 19 forms a rotating structure within the main shaft 11. Furthermore, since the secondary second bevel gear 23 and the secondary first bevel gear 22 are respectively meshed and connected to the upper and lower sides of the main bevel gear 24, according to the basic principle of gear meshing transmission, the rotation direction of the secondary first bevel gear 22 is set opposite to the rotation direction of the secondary second bevel gear 23. That is, the auxiliary shaft 19 and the main shaft 11 form an opposite rotation structure.

[0023] Specifically, in this technical solution, the waste oil is initially coarsely filtered using the coarse filter component 4, according to... Figure 2 , Figure 3 , Figure 4 and Figure 7As shown, the heating cylinder 1 is arranged in a cylindrical structure. Since the feed pipe 2 is an integrated structure connected to the upper end of the cylinder wall of the heating cylinder 1, and the feed pipe 2 is connected to the waste oil supply pipe through the flange on it, and since the coarse filter assembly 4 is arranged horizontally in the upper part of the heating cylinder 1 and is located below the feed pipe 2, when the feed pipe 2 injects waste oil, the waste oil can be directly discharged into the coarse filter assembly 4. Since the coarse filter assembly 4 includes a round basin frame 6 and a first filter plate 7, after the round basin frame 6 is installed, its basin edge overlaps and is fixedly connected to the cylinder wall of the heating cylinder 1 by bolts. After the waste oil is discharged into the coarse filter assembly 4, it flows into the basin cavity along the basin edge of the round basin frame 6. Because the bottom of the round basin frame 6 has through holes arranged in a circular array with the center of the round basin frame 6 as the center, and because the first filter plate 7 is adapted to the bottom of the round basin frame 6, the first filter plate 7 is snapped on and fixed to the bottom of the round basin frame 6 after being installed, and it corresponds to and blocks the through holes on the round basin frame 6, so that the first filter plate 7 and the bottom of the round basin frame 6 are flush. After the waste oil enters the basin cavity of the round basin frame 6, it is filtered by the first filter plate 7. Large solid impurities are intercepted on the first filter plate 7, and the filtered oil flows out downward through the through holes on the round basin frame 6. In this way, the waste oil is initially coarsely filtered. After the main shaft 11 is connected to the inner cylinder cover of the heating cylinder 1, the main shaft 11 moves through the center position of the cylinder cover. Its upper end is inserted into the frame cavity of the motor frame 21 and assembled with the secondary bevel gear 22. Its lower end, along with the connecting plate, is placed inside the heating cylinder 1. Bearings are fixedly engaged at both the upper and lower engagement points of the main shaft 1 and the inner cylinder cover of the heating cylinder 1. When the main shaft 11 is driven by the secondary bevel gear 22, the main shaft 11 forms a rotating structure at the center position of the inner cylinder cover of the heating cylinder 1. Furthermore, since the lower end of the main shaft 11 is radially extended with an integrated connecting plate, the material feeding component 10 is composed of a frame part and an arc plate part. After the material feeding component 10 is installed, the upper end of the frame part is engaged and fixedly connected to the connecting plate in the main shaft 11 with bolts. When the main shaft 11 rotates, it drives the material feeding component 10 to rotate synchronously within the circular basin frame 6. Since the arc plate portion of the material feeder 10 is arranged in a circular array at the lower end of the frame portion with the center of the frame portion as the center, after the material feeder 10 is installed, the arc plate portion is attached to the bottom of the first filter plate 7 and the circular basin frame 6. After the material feeder 10 rotates, the arc plate portion slides along the bottom of the circular basin frame 6 and the first filter plate 7. Through the arc plate portion of the material feeder 10, large solid particles that are intercepted and attached to the first filter plate 7 are dispersed and moved, so as to avoid clogging of the first filter plate 7, thereby improving the flow capacity and filtration efficiency of the first filter plate 7. Because the center of the basin bottom of the circular basin frame 6 is provided with an integrated truncated cone 601, and the connection between the truncated cone 601 and the basin bottom of the circular basin frame 6 is provided with a sludge collection ring groove 8, and because the end of the arc plate of the material feeding component 10 facing the main shaft 11 extends directly above the sludge collection ring groove 8, when the arc plate of the material feeding component 10 slides against the basin bottom and the first filter plate 7 of the circular basin frame 6, the arc-shaped structure of the arc plate of the material feeding component 10 will cause the large solid particles to be separated from the first filter plate 7 and concentrated in the center of the basin bottom of the circular basin frame 6, thereby causing the large solid particles to be fed into the sludge collection ring groove 8. Because the longitudinal section of the sludge collection ring trough 8 is a right-angled "V" shape, and through holes are provided inside the sludge collection ring trough 8, the through holes are arranged in a ring array with the center of the sludge collection ring trough 8 as the center. Since the second filter plate 9 is adapted to the sludge collection ring trough 8, after the second filter plate 9 is installed, it is snapped and fixed to the sludge collection ring trough 8 with bolts, and it corresponds to and blocks the through holes on the sludge collection ring trough 8, so that the second filter plate 9 is flush with the trough wall of the sludge collection ring trough 8. When large solid particles are pushed into the sludge collection ring trough 8, waste oil will also enter the sludge collection ring trough 8. The waste oil is filtered again by the second filter plate 9, and the filtered oil flows out downward through the through holes on the sludge collection ring trough 8.

[0024] Meanwhile, in the above technical solutions, according to Figure 2 As shown, there are two feed pipes 2 arranged symmetrically about the vertical central axis of the heating cylinder 1. Waste oil is injected simultaneously through the two feed pipes 2, so that the waste oil can be evenly distributed in the coarse filter assembly 4, avoiding the phenomenon of uneven flow and ensuring that the entire coarse filter assembly 4 is fully utilized.

[0025] Meanwhile, in the above technical solutions, according to Figure 2 , Figure 3 and Figure 7 As shown, after the material feeder 10 is installed, its center is on the same vertical central axis as the center of the circular basin frame 6, and the frame part covers the outside of the truncated cone part 601, so that the truncated cone part 601 does not affect the rotation of the material feeder 10.

[0026] Specifically, in this technical solution, the coarsely filtered oil is further finely filtered using the fine filtration component 5, according to... Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, after the oil collecting ring groove 16 is installed, its upper end groove opening overlaps and is fixedly connected to the lower side of the circular basin frame 6 with bolts. Its upper end groove opening is correspondingly covered below the through hole in the circular basin frame 6 and the through hole in the sludge collecting ring groove 8. Since the lower side wall of the oil collecting ring groove 16 is set in an inclined state, an integrated conveying pipe is connected to the lowest point on the right side of the lower side wall of the oil collecting ring groove 16. The conveying pipe is set in a vertical downward state. After the coarsely filtered oil flows down through the through hole in the circular basin frame 6 and the through hole in the sludge collecting ring groove 8, it is collected in the oil collecting ring groove 16, slides down along the inclined groove wall of the oil collecting ring groove 16, and converges into the conveying pipe in the oil collecting ring groove 16. Because a sealing ring is fixedly snapped at the pipe opening of the feed pipe in the oil collecting ring groove 16, and because the fine filter assembly 5 includes a filter press cylinder 12, a cylinder cover 13, and a pressure rod 14, the fine filter assembly 5 is horizontally placed in the lower part of the heating cylinder 1, and the fine filter assembly 5 is placed below the coarse filter assembly 4. After the filter press cylinder 12 is installed, its lower side is fixedly connected to the bottom of the heating cylinder 1 by bolts. Furthermore, because an integrated feed pipe is vertically installed on the upper side of the filter press cylinder 12, the feed pipe is connected to the cylinder cavity of the filter press cylinder 12. After the filter press cylinder 12 is connected to the oil collecting ring groove 16, the feed pipe in the oil collecting ring groove 16, along with the sealing ring, is sealed and inserted into the pipe opening of the feed pipe in the filter press cylinder 12. The coarsely filtered oil is discharged into the feed pipe of the filter press cylinder 12 through the feed pipe in the oil collecting ring groove 16, and then enters the cylinder cavity of the filter press cylinder 12 through the feed pipe in the filter press cylinder 12. Since the secondary shaft 19 moves through the center of the truncated cone 601 after installation, and its lower end extends downward, bearings are fixedly engaged at both the upper and lower interlocking points of the secondary shaft 19 and the truncated cone 601. When the secondary shaft 19 is driven by the secondary bevel gear 23, it forms a rotating structure on the truncated cone 601. Since the lower end of the crankshaft 18 is fixedly engaged with a bearing, after the crankshaft 18 is installed, its upper end is sleeved and fixedly connected to the lower end of the secondary shaft 19 with bolts, and its lower end, along with the bearing, is movably inserted into the center of the bottom of the heating cylinder 1. When the secondary shaft 19 rotates, it drives the crankshaft 18 to rotate synchronously at the bottom of the heating cylinder 1, and the crankshaft 18 and the secondary shaft 19 form a coaxial rotating structure. Since the pressure rod 14 is composed of a rod body and a plug head concentric with the rod body, the end of the rod body facing the auxiliary shaft 19 has a "U" shape, and the "U"-shaped end of the rod body is inserted into and fixedly connected to a shaft column by bolts. Furthermore, since the right end of the connecting rod 17 is fixedly clamped with a bearing, after the connecting rod 17 is installed, its right end is movably inserted into the "U"-shaped end groove of the rod body in the pressure rod 14, and its right end, along with the bearing, is movably sleeved on the pressure rod 14. On the shaft column of the rod body in section 4, since the left end of the connecting rod 17 is fixedly connected to the bearing, after the connecting rod 17 is installed, its left end, along with the bearing, is movably sleeved on the journal of the crankshaft 18. After the crankshaft 18 is driven to rotate, the left end of the connecting rod 17 forms a rotating structure on the crankshaft 18, and the right end of the connecting rod 17 forms a rotating structure on the rod body of the pressure rod 14. In this way, the connecting rod 17 is driven to perform push-pull motion, and the pressure rod 14 is reciprocated by pushing and pulling the connecting rod 17. Because a sealing ring is fixedly attached to the plug head in the pressure rod 14, after the pressure rod 14 is installed, the plug head and the sealing ring are movably inserted into the cylinder cavity of the filter press cylinder 12, and the rod body extends outward through the bottom of the filter press cylinder 12. When the pressure rod 14 is driven, it forms a reciprocating sliding structure in the cylinder cavity of the filter press cylinder 12. When the pressure rod 14 is driven to slide to the right, it pushes the coarsely filtered grease in the filter press cylinder 12 through the plug head. Conversely, when the pressure rod 14 is driven to return to its original position and slide to the left, it draws the cylinder cavity of the filter press cylinder 12 into a negative pressure cavity through the plug head, so that the coarsely filtered grease in the oil collecting ring groove 16 is quickly filled into the cylinder cavity of the filter press cylinder 12. Through the reciprocating motion of the pressure rod 14, the coarsely filtered grease in the filter press cylinder 12 is continuously pushed. Since the left end of the cylinder head 13 is fixedly connected with a sealing ring, after the cylinder head 13 is installed, its left end moves through the right side wall of the heating cylinder 1 and connects with the filter cylinder 12. Its left end, along with the sealing ring, is threadedly fixed to the cylinder opening of the filter cylinder 12. Since the cylinder head 13 has a hollow structure with a filter cavity, after the pressure plate 1301 is installed, it is threadedly fixed to the opening of the filter cavity in the cylinder head 13. The pressure plate 1301 has through holes in a ring array. When the coarsely filtered grease in the filter cylinder 12 is pushed by the pressure rod 14, it enters the filter cavity in the cylinder head 13 through the holes in the pressure plate 1301. Since multiple filter elements 15 are arranged at equal intervals in the filter chamber of cylinder head 13, the coarsely filtered grease is finely filtered through multiple filter elements 15. Because the filter chamber in cylinder head 13 has through holes arranged in a ring array on its cavity wall, and the right end of cylinder head 13 is provided with an integrated oil outlet pipe, which is bent downwards, the filter chamber in cylinder head 13 is connected to the oil outlet pipe in cylinder head 13 through the holes in the filter chamber. After coarse filtration, the grease is finely filtered by the filter element 15 and enters the oil outlet pipe in cylinder head 13 through the holes in the filter chamber, and is then discharged externally by the oil outlet pipe in cylinder head 13.

[0027] Meanwhile, in the above technical solutions, according to Figure 6 As shown, the length of the sealing ring on the plug head of the pressure rod 14 is greater than the diameter of the connection between the feed pipe and the filter cylinder 12 in the filter cylinder 12. When the pressure rod 14 is driven to slide completely to the right, the sealing ring on the plug head can block the connection between the feed pipe and the filter cylinder 12 in the filter cylinder 12, preventing the coarsely filtered grease from leaking out of the fine filter assembly 5.

[0028] Meanwhile, in the above technical solutions, according to Figure 5 and Figure 6 As shown, since the pressure plate 1301 is set at the opening of the filter cavity in the cylinder head 13, it is used to cover the filter element 15. The pressure plate 1301 neatly presses multiple filter elements 15 into the filter cavity in the cylinder head 13. Since the pressure plate 1301 can form a disassembly structure on the cylinder head 13, it is easy to replace the filter element 15 after the cylinder head 13 is removed from the filter cylinder 12.

[0029] Meanwhile, in the above technical solutions, according to Figure 1 and Figure 2 As shown, the heating cylinder 1 uses electric heating, with heating wires directly installed inside the cylinder wall (which is existing technology and not described in the attached drawings of the specification) to heat the air inside the cylinder cavity of the heating cylinder 1 to a suitable temperature; Because waste oil is prone to solidification at low temperatures, resulting in high viscosity and difficulty in passing through the coarse filter assembly 4 and the fine filter assembly 5, the heating cylinder 1 can heat and maintain the waste oil in a liquid state, improving its fluidity and making it easier for the waste oil to pass through the coarse filter assembly 4 and the fine filter assembly 5, thereby improving the filtration speed and effect. In addition, a cylinder cover is fixedly connected to the opening of the heating cylinder 1 by bolts. The cylinder cover is used to seal the heating cylinder 1, which can effectively reduce heat loss, maintain a constant temperature environment inside the heating cylinder 1, and improve the uniformity of heating.

[0030] Specifically, in this technical solution, the oil after coarse and fine filtration is acidified, according to... Figure 1 , Figure 2 and Figure 5As shown, the acidification reaction tank 3 is located to the right of the heating cylinder 1, and the opening of the acidification reaction tank 3 corresponds to the oil outlet pipe in the cylinder head part 13. After the coarse filter assembly 4 coarsely filters the waste oil, the fine filter assembly 5 further finely filters the coarsely filtered oil. The finely filtered oil enters the acidification reaction tank 3, and an acidic catalyst (such as concentrated sulfuric acid) is added to the acidification reaction tank 3. By stirring, the acidic catalyst and the filtered oil are mixed and reacted. By following the orderly operation of filtering first and then acidification, the solid impurities in the waste oil consume acid and interfere with the acidification reaction, thus ensuring the efficient progress of the acidification reaction. Example 2:

[0031] Based on Embodiment 1, please refer to the following: Figures 9-12 The technical solution shown involves solid impurities filtered from waste oil being intercepted and retained on the filter components. If these solid impurities are not cleaned in time, they can easily cause blockage, leading to increased resistance and reduced flow of waste oil. To address the problem of not being able to automatically clean the filtered solid impurities and affecting filtration efficiency, the cleaning component 27 automatically cleans and collects large solid particles collected in the sludge collection ring trough 8, and presses out the oil contained in the large solid particles, thus reducing oil waste while separating impurities.

[0032] Specifically, in this technical solution, during the filtration operation of the coarse filter component 4, the cleaning component 27 automatically cleans the filtered large-particle solid impurities. Figure 9 , Figure 10 , Figure 11 and Figure 12 As shown, the cleaning assembly 27 includes a cleaning tube 28 and a spiral rod 29, which are inclined and mirrored about the vertical central axis of the circular basin frame 6. The linkage frame 26 is used for the common drive of the two cleaning assemblies 27. Since the linkage frame 26 is positioned above the truncated cone portion 601 and is sleeved and fixedly connected to the middle of the secondary shaft 19 with bolts, and since the left and right ends of the linkage frame 26 are used for the assembly of the two cleaning tubes 28 respectively, the upper end of the cleaning tube 28 is snapped and fixedly connected to the linkage frame 26 with bolts, when the secondary shaft 19 rotates, the cleaning tube 28 is driven to rotate synchronously through the linkage frame 26. Because the middle of the truncated cone section 601 is horizontally equipped with an integrated circular guide rail, the center of which coincides with the rotation center of the cleaning tube 28, and because the lower side wall of the middle of the cleaning tube 28 is equipped with an integrated slider, the size of which matches the size of the circular guide rail in the circular basin frame 6, after the cleaning tube 28 is installed, the slider is movably locked onto the circular guide rail in the circular basin frame 6, so that the cleaning tube 28 is movably positioned in the circular basin frame 6, assisting the cleaning tube 28 to rotate stably. Since the cleaning pipe 28 is installed and its lower end is inserted into the sludge collection ring trough 8, and its inclination angle is the same as the inclination angle of the inclined trough wall in the sludge collection ring trough 8, and since the lower side wall of the cleaning pipe 28 has a feed inlet, the scraper 31 is integrated and set at the feed inlet of the cleaning pipe 28, and it is set in an inclined downward state. Since the cleaning pipe 28 is connected to the sludge collection ring trough 8, the scraper 31 is attached to the inclined trough wall in the sludge collection ring trough 8. When the cleaning pipe 28 is driven to rotate, the lower end of the cleaning pipe 28 slides along the sludge collection ring trough 8, and the scraper 31 slides against the inclined trough wall in the sludge collection ring trough 8. Through the scraper 31, large particles of solid impurities collected in the sludge collection ring trough 8 are scooped up and scooped into the lower end cavity of the cleaning pipe 28 through the feed inlet in the cleaning pipe 28. Since the stationary bevel gear 33 has an integrated shaft tube at its center, after the stationary bevel gear 33 is installed, the shaft tube is sleeved and fixedly connected to the upper end of the truncated cone 601 by bolts, and its center coincides with the rotation center of the cleaning tube 28. Since the moving bevel gear 32 has an integrated shaft column at its center, after the moving bevel gear 32 is installed, the shaft column is sleeved and fixedly connected to the upper end of the spiral rod 29 by bolts, and it is inclined and meshes with the stationary bevel gear 33. Its inclination angle is the same as the inclination angle of the cleaning tube 28. When the cleaning tube 28 is driven to rotate, it drives the spiral rod 29 inside to move synchronously, so that the moving bevel gear 32 revolves around the stationary bevel gear 33. Through the meshing action between the moving bevel gear 32 and the stationary bevel gear 33, the moving bevel gear 32 drives the spiral rod 29 to rotate. Since the upper and lower ends of the spiral rod 29 are fixedly connected with bearings, the spiral rod 29 is movably inserted into the cavity of the cleaning tube 28 after installation. Its upper end, along with the bearing, moves through the upper cavity wall of the cleaning tube 28 and extends outward, while its lower end, along with the bearing, is movably inserted into the lower cavity wall of the cleaning tube 28. Driven by the driven bevel gear 32, the spiral rod 29 forms a rotating structure in the cavity of the cleaning tube 28. As the spiral depth of the screw 29 gradually decreases from bottom to top, when large solid particles enter the lower end cavity of the cleaning pipe 28, the screw 29 rotates in the cavity of the cleaning pipe 28, and the large solid particles are transported from bottom to top in the cavity of the cleaning pipe 28. During the transport process, the large solid particles are pressed. In addition, the oil produced during the pressing of the large solid particles will slide back down into the sludge collection ring groove 8 along the inclined wall of the cleaning pipe 28. Since the sewage discharge ring pipe 30 is an integrated structure set at the upper end of the truncated cone 601 and extends downward, and since the lower side wall of the upper end of the cleaning pipe 28 has a discharge pipe, after the cleaning pipe 28 is installed, the discharge pipe passes through the conical protective cover on the sewage discharge ring pipe 30 and is inserted into the upper end of the sewage discharge ring pipe 30. Large solid impurities that are squeezed in the cleaning pipe 28 are discharged into the sewage discharge ring pipe 30 through the discharge pipe in the cleaning pipe 28. Since the sewage discharge ring pipe 30 and the oil collection ring groove 16 are connected by a sleeve, a discharge trough is connected to the lower end of the sewage discharge ring pipe 30 by bolts. The discharge trough is set at the lower end of the sewage discharge ring pipe 30 in an inclined state and is set in a closed state. Since the lower end of the discharge trough in the sewage discharge ring pipe 30 passes through the bottom of the heating cylinder 1 and extends downward, the large solid impurities after being pressed are discharged outward along the sewage discharge ring pipe 30 and the discharge trough in the sewage discharge ring pipe 30.

[0033] Meanwhile, in the above technical solutions, according to Figure 10 and Figure 11 As shown, the connection between the truncated cone portion 601 and the secondary shaft 19 should be higher than the edge of the circular basin frame 6 to avoid the waste grease inside the circular basin frame 6 affecting the rotation of the secondary shaft 19. In addition, the upper end of the drain ring pipe 30 is higher than the edge of the round basin frame 6 to prevent waste grease in the round basin frame 6 from overflowing into the drain ring pipe 30. The upper end of the drain ring pipe 30 is equipped with a conical cover for sealing it, which further prevents waste grease in the round basin frame 6 from overflowing into the drain ring pipe 30.

[0034] Meanwhile, in the above technical solutions, according to Figure 10 and Figure 11 As shown, bearings are fixedly fastened at both the upper and lower ends of the conical cover in the sewage ring pipe 30. After installation, the conical cover is movably sleeved outside the truncated cone portion 601. Its upper end, along with the bearing, is movably fastened to the upper side of the upper end of the sewage ring pipe 30, and its lower end, along with the bearing, is movably fastened to the lower side of the upper end of the sewage ring pipe 30. The conical cover forms a rotating structure at the upper end of the sewage ring pipe 30, that is, it enables the conical cover to rotate synchronously with the cleaning pipe 28 without affecting the rotation of the cleaning pipe 28.

[0035] Meanwhile, in the above technical solutions, according to Figure 9 and Figure 10 As shown, after the discharge trough in the sewage ring pipe 30 is connected to the auxiliary shaft 19, the auxiliary shaft 19 moves through the discharge trough in the sewage ring pipe 30, so that the discharge trough in the sewage ring pipe 30 does not affect the rotation of the auxiliary shaft 19.

[0036] Meanwhile, in the above technical solutions, according to Figure 9and Figure 10 As shown, the opposite rotation of the main shaft 11 and the auxiliary shaft 19 drives the material feeding component 10 and the cleaning component 27 to move in opposite directions, so that the cleaning component 27 and the material feeding component 10 generate shearing force, which helps to break up large solid particles that are stuck together, making it easier for the cleaning component 27 to collect large solid particles.

[0037] To better demonstrate the specific workflow of the waste oil harmless purification combined device, this embodiment provides a waste oil harmless purification combined device and method, the method including the following steps: First, after the waste oil is injected into the heating cylinder 1, it undergoes preliminary coarse filtration through the coarse filter assembly 4; then, while the coarse filter assembly 4 is performing preliminary coarse filtration on the waste oil, the cleaning assembly 27 automatically cleans the large particulate solid impurities filtered out by the coarse filtration; next, after the waste oil completes the coarse filtration, it enters the fine filter assembly 5 through the oil collecting ring groove 16, and undergoes further fine filtration through the fine filter assembly 5; finally, after the waste oil completes the coarse and fine filtration, it is injected into the acidification reaction tank 3 for acidification treatment.

[0038] This is the entire working process of the waste oil harmless purification combination device and method. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0039] 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; the contents not described in detail in this specification belong to the prior art known to those skilled in the art; in addition, the directional terms such as up, down, left, right, front, and back in the text only represent their relative positions and not absolute positions.

[0040] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A combined device for the harmless treatment and purification of waste oil, comprising: A heating cylinder (1) is provided with a feed pipe (2) for injecting waste oil at the upper end of the heating cylinder (1), and an acidification reaction tank (3) is provided on the right side of the heating cylinder (1). Its characteristic is that it further includes: The coarse filter assembly (4) is located in the upper part of the heating cylinder (1); Fine filtration component (5), which is placed below the coarse filtration component (4) and inside the heating cylinder (1), performs a dual filtration operation through the combination of the coarse filtration component (4) and the fine filtration component (5); The fine filtration component (5) discharges the filtered oil into the acidification reaction tank (3) for an orderly operation of filtration followed by acidification.

2. The waste oil harmless purification combined device according to claim 1, characterized in that: The coarse filter assembly (4) includes a circular basin frame (6) fixed inside the heating cylinder (1) and a first filter plate (7) fixed in the through hole of the circular basin frame (6). The circular basin frame (6) has an integrated truncated cone part (601) at its center, and a dirt collection ring groove (8) is provided at the connection between the truncated cone part (601) and the bottom of the basin in the circular basin frame (6). A second filter plate (9) is fixed in the through hole of the dirt collection ring groove (8).

3. The waste oil harmless purification combined device according to claim 2, characterized in that: The circular basin frame (6) is rotatably connected to a material-pushing component (10), and the material-pushing component (10) is slidably attached to the first filter plate (7). The material-pushing component (10) is used to concentrate and agitate the filtered impurities. The feeding component (10) is fixedly connected to the main shaft (11) which is rotatably connected to the inner cylinder cover of the heating cylinder (1).

4. The waste oil harmless purification combined device according to claim 1, characterized in that: The fine filtration assembly (5) includes a filter cylinder (12) fixed in the heating cylinder (1), a cylinder cover (13) threaded in the cylinder opening of the filter cylinder (12), and a pressure rod (14) movably inserted in the filter cylinder (12). The filter element (15) is placed in the cylinder cover (13) by a pressure plate (1301) pressing against it, and the pressure plate (1301) is threaded in the opening of the cylinder cover (13). The pressure rod (14) forms a reciprocating sliding structure in the filter cylinder (12). The filter press cylinder (12) is connected to the oil collecting ring groove (16), and the oil collecting ring groove (16) is covered and fixed to the lower side of the round basin frame (6).

5. The waste oil harmless purification combined device according to claim 4, characterized in that: The pressure rod (14) is rotatably connected to the right end of the connecting rod (17), and the left end of the connecting rod (17) is rotatably connected to the crankshaft (18). The crankshaft (18) is fixed to the lower end of the auxiliary shaft (19), and the crankshaft (18) and the auxiliary shaft (19) form a coaxial rotation structure in the heating cylinder (1). The secondary shaft (19) is connected to the truncated cone (601) by rotation.

6. The waste oil harmless purification combined device according to claim 5, characterized in that: The secondary shaft (19) and the main shaft (11) are driven by the drive mechanism (20) to form an opposite rotation structure. The drive mechanism (20) includes a motor frame (21) fixed to the inner cover of the heating cylinder (1), a secondary first bevel gear (22) rotatably connected to the lower side of the motor frame (21), and a secondary second bevel gear (23) rotatably connected to the upper side of the motor frame (21). The secondary first bevel gear (22) and the secondary second bevel gear (23) are respectively fixed to the upper end of the main shaft (11) and the upper end of the secondary shaft (19). The secondary second bevel gear (23) and the secondary first bevel gear (22) are respectively meshed and connected to the upper and lower sides of the main bevel gear (24). The main bevel gear (24) is driven by the reduction motor (25) to form a rotation structure on the left side of the motor frame (21).

7. The waste oil harmless purification combined device according to claim 5, characterized in that: A linkage frame (26) is fixedly connected to the middle of the secondary shaft (19), and a cleaning component (27) that can automatically clean the impurities collected in the sludge collection ring groove (8) is inclinedly arranged on the linkage frame (26). The cleaning component (27) is mirrored about the vertical central axis of the linkage frame (26). The cleaning component (27) and the secondary shaft (19) form a synchronous rotation structure in the sludge collection ring groove (8). The cleaning component (27) includes a cleaning pipe (28) fixed to the linkage frame (26) and a screw rod (29) for conveying and pressing impurities in the cleaning pipe (28). The discharge pipe at the upper end of the cleaning pipe (28) is connected to the sewage discharge ring pipe (30) set on the truncated cone part (601) by insertion. The sewage discharge ring pipe (30) is used to discharge the impurities after cleaning and pressing. An integrated scraper (31) is inclinedly set at the feed inlet at the lower end of the cleaning pipe (28), and the scraper (31) is slidably connected to the wall of the sewage collection ring groove (8). The scraper (31) is used to scoop up the impurities collected in the sewage collection ring groove (8).

8. The waste oil harmless purification combined device according to claim 7, characterized in that: The spiral depth of the spiral rod (29) gradually decreases from bottom to top. A movable bevel gear (32) is fixedly connected to the upper end of the spiral rod (29), and the movable bevel gear (32) meshes with the stationary bevel gear (33) fixed on the truncated cone (601). The spiral rod (29) forms a rotating structure inside the cleaning tube (28).

9. A combined device and method for the harmless purification of waste oil as described in claim 1, characterized in that: The method includes the following steps: Step 1: After the waste oil is injected into the heating cylinder (1), it is initially coarsely filtered through the coarse filter assembly (4); Step 2: When the coarse filter component (4) performs preliminary coarse filtration of waste oil, the cleaning component (27) automatically cleans the large solid particles filtered out by the coarse filter. Step 3: After coarse filtration, the waste oil enters the fine filtration assembly (5) through the oil collection ring groove (16) and undergoes further fine filtration through the fine filtration assembly (5); Step 4: After coarse and fine filtration, the waste oil is injected into the acidification reaction tank (3) for acidification treatment.

Images