A waste oil regeneration wastewater zero discharge treatment device and method

Abstract

The present application provides a kind of waste oil regeneration wastewater zero discharge treatment device and method, it is related to wastewater treatment technical field, the present application includes support frame, support frame is equipped with conveying unit, the inside of conveying unit is provided with extrusion unit, the upper end of conveying unit is provided with feed hopper, impurity-containing wastewater is input into conveying unit from feed hopper, can utilize extrusion unit and separate dry and wet by extruding impurities in wastewater, adjusting unit is provided in conveying unit, wherein adjusting unit can adjust the gap of conveying unit.By the cooperation structure of the ring groove of adjusting unit and the clamping part, the filter gap between adjacent partitions can be quickly adjusted according to the particle size of the impurities in the wastewater to be treated, without replacing the core filter components, the waste oil regeneration wastewater treatment needs of different water quality can be adapted, and the application scenarios of the device are greatly widened.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a zero-discharge treatment device and method for waste oil regeneration wastewater. Background Technology

[0002] Waste mineral oil recycling is one of the core areas of hazardous waste resource utilization. In the recycling processes such as waste oil settling, pickling, distillation, and refining, a large amount of production wastewater containing oil, suspended solids, asphalt, oil sludge, and other impurities is generated. This type of wastewater has a complex composition and is difficult to separate into solid and liquid components. If not treated properly, it will cause serious environmental pollution. Efficient solid-liquid separation pretreatment is the core prerequisite for ensuring the subsequent deep treatment effect of waste oil recycling wastewater and realizing wastewater recycling and zero discharge.

[0003] Currently, the industry primarily uses screw extrusion solid-liquid separation equipment for the solid-liquid separation pretreatment of waste oil regeneration wastewater. This type of equipment enables continuous feeding, continuous extrusion dewatering, and solid residue discharge, offering high processing efficiency and strong adaptability, making it the mainstream equipment for waste oil regeneration wastewater pretreatment. Existing screw extrusion separation equipment typically employs a fixed-gap screen cylinder structure or a fixed-stack annular baffle structure, achieving water filtration and solid residue retention through the pores of the screen cylinder or the gaps between the baffles.

[0004] However, existing equipment of this type has a fixed filtration gap in practical applications, which cannot be flexibly adjusted according to the fluctuations in water quality and changes in the particle size of impurities in the wastewater. When the influent water quality changes, it is easy for the filtration gap to be too large, causing fine solids to penetrate and solid-liquid separation to be incomplete, or for the filtration gap to be too small, causing the filter gap to clog quickly and the equipment's processing efficiency to drop sharply. The only way to adapt to different working conditions is to stop the machine and replace the screen cylinder or baffle with different specifications. The operation is cumbersome and the downtime is long. It cannot adapt to the treatment needs of waste oil regeneration wastewater with large fluctuations in water quality and changing working conditions, and the applicable scenarios of the equipment are severely limited. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a zero-discharge treatment device and method for waste oil recycling wastewater.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a waste oil recycling wastewater zero-discharge treatment device, comprising a support frame, a conveying unit installed on the support frame, an extrusion unit provided inside the conveying unit, a feed hopper provided at the upper end of the conveying unit, wastewater containing impurities being input into the conveying unit from the feed hopper, and the extrusion unit being used to extrude and separate the impurities in the wastewater into dry and wet states; an adjustment unit provided inside the conveying unit, wherein the adjustment unit can adjust the gap of the conveying unit.

[0007] Preferably, the conveying unit includes a first mounting frame and a second mounting frame, which are fixedly installed on the uniform support frame. A drive unit is installed on the side of each of the first and second mounting frames. Multiple partitions are provided between the first and second mounting frames, and the gap between the multiple partitions is adjusted by means of an adjustment unit.

[0008] Preferably, four connecting beams are installed between the first mounting frame and the second mounting frame. The four connecting beams are clamped at the four corners of multiple partitions. The multiple partitions are stacked together, and their internal circular holes form a cylindrical cavity. A connecting shaft is provided inside the cylindrical cavity. The connecting shaft is driven to rotate by a driving unit. The surface of the connecting shaft is provided with an auger. The rotating connecting shaft drives the auger to squeeze water in the impurities for dry and wet separation. The gaps between the multiple partitions are used to separate impurities in the water. The surface of the connecting shaft is provided with a frustum-shaped connecting shaft that gradually thickens from the direction of the feed hopper to facilitate the squeezing of water.

[0009] Preferably, the surface of the connecting shaft near the second mounting bracket is provided with a boss. The inclined surface of the boss near the partition can be used to separate and discharge the impurities squeezed out of the boss. A cleaning unit is provided between the connecting beams. The cleaning unit can clean the surface of the boss to sweep the squeezed water and impurities off the boss.

[0010] Preferably, the cleaning unit includes a fixing plate, which is mounted on two connecting crossbeams. A round rod and a long rod are slidably inserted into the fixing plate. A cleaning block is fixedly connected to the bottom end of the round rod and the long rod. The cleaning block can clean the inclined surface of the boss. A compression spring is sleeved on the surface of the long rod. The two ends of the compression spring are fixed to the cleaning block and the fixing plate, respectively. The elastic force of the compression spring can be used to push the cleaning block to be close to the inclined surface of the boss.

[0011] Preferably, the surface of the cleaning block is provided with bristles, which can be used to clean the inclined surface of the boss.

[0012] Preferably, the adjustment unit includes annular grooves evenly formed on the surface of the connecting beam, and a locking part can be provided on the annular groove. The two locking parts can be used to clamp the partition on both sides to fix the partition and limit the gap between the two partitions.

[0013] Preferably, the engaging part includes two arc-shaped clamps, which are clamped on the annular groove and fixed to the surface of the connecting beam. Guide blocks are fixedly installed at both ends of one of the arc-shaped clamps. Insertion holes are opened at both ends of one of the arc-shaped clamps. When the two arc-shaped clamps are clamped together, the guide blocks are inserted into the insertion holes. Insert plates are fixedly connected to both ends of one of the arc-shaped clamps. The insert plates pass through the two ends of the other arc-shaped clamp. The ends of the insert plates have installation grooves. A pressure arm is rotatably installed inside the installation grooves. A positioning block is fixedly connected to the surface of the arc-shaped clamp fixed to the insert plate. A hook groove is opened on the surface of the positioning block. A pressing groove is opened on the surface of the pressure arm. An elastic rib is sleeved between the pressing groove and the hook groove, and the elastic rib can be used to fix the pressure arm.

[0014] Preferably, rectangular grooves are formed on the surfaces of the two arc-shaped hoops, and a tension spring is fixedly connected between the two rectangular grooves. The tension spring is sandwiched between the two arc-shaped hoops and the surface of the annular groove.

[0015] Preferably, a zero-discharge treatment device and method for waste oil recycling wastewater, employing any one of the waste oil recycling wastewater zero-discharge treatment devices described above, includes the following steps:

[0016] S1. Based on the particle size of the impurities in the waste oil regeneration wastewater to be treated, the gap between multiple baffles is adjusted by the adjustment unit. The two arc-shaped clamps of the locking part are used to hold the baffles in the annular groove of the connecting crossbeam and clamp them on both sides of the baffle to complete the positioning and gap fixing of the baffles, which is adapted to the precision requirements of solid-liquid separation.

[0017] S2. Waste oil regeneration wastewater containing impurities is fed into the conveying unit through the feed hopper, and the input wastewater is received by the cylindrical cavity formed by the internal round holes of multiple stacked partitions.

[0018] S3. Start the drive unit, drive the coupling shaft to drive the auger to rotate synchronously. The rotating auger axially conveys the impurities in the wastewater. At the same time, the coupling cone structure, which gradually thickens from the direction of the feed hopper, squeezes the impurities in the conveying process step by step, squeezing out the water in the impurities. The squeezed wastewater is discharged through the gaps between the partitions, realizing the dry and wet separation of impurities and water in the wastewater.

[0019] S4. The solid slag after extrusion and dehydration is continuously pushed by the auger to the boss at the end of the connecting shaft. Guided by the inclined surface of the boss, the dehydrated solid slag is separated and discharged from the cylindrical cavity of the conveying unit, completing the centralized collection and disposal of the solid slag.

[0020] S5. During the solid slag removal process, the cleaning block of the cleaning unit always adheres to the inclined surface of the boss under the elastic force of the compression spring. The brush bristles on the surface of the cleaning block continuously and dynamically clean the surface of the boss, sweeping off the solid slag attached to the surface of the boss in a timely manner, avoiding the accumulation and adhesion of solid slag, and ensuring the continuous and stable operation of the device.

[0021] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0022] 1. In this invention, by using an auger in conjunction with a truncated cone structure whose diameter gradually increases from the feed end to the discharge end, the impurities are conveyed axially and pressurized step by step. This can fully squeeze out the water carried by the impurities in the waste oil recycling wastewater. Combined with the filter gaps formed by stacked partitions, the solid and liquid are accurately separated, and the water content of the separated solid residue is greatly reduced.

[0023] 2. In this invention, by adjusting the annular groove of the unit and the engaging part, the filtration gap between adjacent baffles can be quickly adjusted according to the particle size of the impurities in the wastewater to be treated. It can adapt to the treatment needs of waste oil regeneration wastewater of different water qualities without replacing the core filter components, greatly expanding the applicable scenarios of the device. At the same time, the engaging part adopts a double arc-shaped clamping and locking structure, which can achieve stable bidirectional clamping and positioning of the baffles, avoiding the problems of baffle displacement and gap changes during device operation, and ensuring the stability of filtration effect during long-term operation.

[0024] 3. In this invention, an elastically movable cleaning unit is set at the discharge end. The cleaning block is pushed to always fit the conical inclined surface of the boss by the continuous elastic force of the compressed spring. With the help of the brush bristles, the rotating boss surface is continuously and dynamically cleaned. The dewatered solid residue attached to the boss surface can be removed in time. This fundamentally solves the industry pain points of solid residue adhesion and discharge port blockage in waste oil recycling wastewater treatment. It avoids the equipment from shutting down due to material blockage failure, greatly extends the continuous operation time and maintenance-free cycle of the equipment, and reduces the operation and maintenance investment of manual cleaning.

[0025] 4. In this invention, the conveying unit achieves overall assembly of the mounting frame and partition through the connecting beam, making disassembly and maintenance convenient; the locking part achieves docking guidance through the guide block and the insertion hole, and with the quick locking structure of the insertion plate, pressure arm and elastic rib, supplemented by the pre-tightening force of the pull spring, the arc hoop and the ring groove can be stably clamped and fixed, the locking operation is simple and convenient, and there is no risk of loosening during long-term operation, which greatly improves the structural reliability and service life of the device.

[0026] 5. In this invention, through efficient solid-liquid separation treatment, solid impurities in waste oil regeneration wastewater can be completely separated. The separated clear liquid can be entered into subsequent processes for regeneration treatment, realizing the recycling of water resources. The dehydrated solid residue can be collected and disposed of harmlessly, avoiding environmental pollution caused by direct discharge of wastewater from the source, while reducing water consumption in the waste oil regeneration process, thus achieving excellent environmental and economic benefits. Attached Figure Description

[0027] Figure 1This invention presents a three-dimensional structural schematic diagram of a waste oil recycling wastewater zero-discharge treatment device and method.

[0028] Figure 2 This is another structural schematic diagram of the waste oil recycling wastewater zero-discharge treatment device and method proposed by the present invention;

[0029] Figure 3 This is a partial schematic diagram of the extrusion unit in the waste oil recycling wastewater zero-discharge treatment device and method proposed in this invention;

[0030] Figure 4 This is a partial schematic diagram of the cleaning unit in the waste oil recycling wastewater zero-discharge treatment device and method proposed in this invention;

[0031] Figure 5 This is a partial schematic diagram of the connecting beam in the waste oil recycling wastewater zero-discharge treatment device and method proposed in this invention;

[0032] Figure 6 This is a partial schematic diagram of the regulating unit in the waste oil recycling wastewater zero-discharge treatment device and method proposed in this invention;

[0033] Figure 7 This invention proposes a zero-discharge treatment device and method for waste oil recycling wastewater. Figure 5 Enlarged view of point A;

[0034] Figure 8 This invention proposes a zero-discharge treatment device and method for waste oil recycling wastewater. Figure 6 Enlarged view of point B.

[0035] Legend: 1. Support frame; 2. Mounting frame 1; 3. Mounting frame 2; 4. Drive unit; 5. Feed hopper; 6. Partition plate; 7. Connecting beam; 8. Cleaning unit; 81. Fixing plate; 82. Round rod; 83. Long bar; 84. Cleaning block; 85. Compression spring; 86. Brush bristles; 9. Boss; 10. Coupling shaft; 11. Conical frustum; 12. Screwdriver; 13. Ring groove; 14. Arc hoop; 15. Positioning block; 16. Hook groove; 17. Insert plate; 18. Mounting groove; 19. Pressing groove; 20. Pressure arm; 21. Rectangular groove; 22. Pull spring; 23. Insertion hole; 24. Guide block. Detailed Implementation

[0036] Example 1, such as Figure 1-8As shown, a zero-discharge treatment device and method for waste oil regeneration wastewater includes a support frame 1 as an integral supporting base. A conveying unit for conveying wastewater containing impurities is fixedly installed on the top of the support frame 1. The top of the feed end of the conveying unit is connected to a feed hopper 5 for inputting the waste oil regeneration wastewater to be treated. The interior of the conveying unit forms a cylindrical cavity extending in the horizontal direction. A squeezing unit that can rotate around its own axis is coaxially arranged in the cylindrical cavity. The squeezing unit is used to squeeze the wastewater containing impurities entering the cylindrical cavity to achieve dry and wet separation of impurities and water in the wastewater. The conveying unit is also provided with an adjustment unit for adjusting its own filter gap. The conveying unit includes a first mounting frame 2 and a second mounting frame 3 arranged horizontally opposite each other. Both the first mounting frame 2 and the second mounting frame 3 are fixed to the top end face of the support frame 1. The first mounting frame 2 and the second mounting frame 3 are fixedly connected by four connecting beams 7. The four connecting beams 7 are arranged in a rectangular array between the opposite end faces of the first mounting frame 2 and the second mounting frame 3. Multiple annular partitions 6 are stacked between the four connecting beams 7. The inner holes of each partition 6 are coaxially spliced ​​to form a cylindrical cavity inside the conveying unit. A filter gap for filtering water is formed between two adjacent partitions 6. An adjustment unit acts on each partition 6 to adjust the spacing between adjacent partitions 6. The extrusion unit includes a connecting shaft 10 and an auger 12. The connecting shaft 10 is coaxially inserted inside the cylindrical cavity of the conveying unit. The two ends of the connecting shaft 10 are rotatably connected to the first mounting frame 2 and the second mounting frame 3 respectively through bearings. The outer end face of the second mounting frame 3 is fixed with a drive unit 4. The output end of the drive unit 4 is connected to the corresponding end of the connecting shaft 10 to drive the connecting shaft 10 to rotate around its own axis. The auger 12 is fixedly connected to the outer circumferential surface of the connecting shaft 10. The outer circumferential surface of the connecting shaft 10 is also provided with a truncated cone 11. The diameter of the truncated cone 11 gradually increases from the feed end where the feed hopper 5 is located to the discharge end to cooperate with the auger 12 to extrude and dehydrate the impurities in the conveying process step by step. A boss 9 is fixed on the outer circumference of the end of the connecting shaft 10 near the second mounting frame 3. The conical slope of the boss 9 is arranged facing the discharge end of the partition plate 6. The debris after being squeezed and dehydrated can be discharged to the outside of the device along the conical slope of the boss 9 with the conveying action of the auger 12. A cleaning unit 8 is also provided at the end of the connecting beam 7 near the second mounting frame 3. The cleaning end of the cleaning unit 8 is attached to the conical slope of the boss 9 to clean its surface as the boss 9 rotates. The cleaning unit 8 includes a fixing plate 81, which is horizontally fixed between two adjacent connecting beams 7. A round rod 82 and a long rod 83 are slidably passed through the fixing plate 81 in the vertical direction. The bottom ends of the round rod 82 and the long rod 83 are fixedly connected to a cleaning block 84. A compression spring 85 is sleeved on the outer periphery of the long rod 83. The upper end of the compression spring 85 abuts against the lower surface of the fixing plate 81, and the lower end of the compression spring 85 abuts against the upper surface of the cleaning block 84. The compression spring 85 is always in a compressed state to apply an elastic thrust toward the conical inclined surface of the boss 9 to the cleaning block 84, so that the lower surface of the cleaning block 84 is always in contact with the conical inclined surface of the boss 9.A brush bristle 86 is fixed to one side of the cleaning block 84 facing the conical inclined surface of the boss 9. The ends of the brush bristle 86 are in close contact with the conical inclined surface of the boss 9 to continuously brush the surface of the boss 9 during rotation as the cleaning block 84 moves. The adjustment unit includes multiple sets of annular grooves 13 and engaging parts that cooperate with the annular grooves 13. Each annular groove 13 is evenly opened on the outer circumferential surface of the connecting beam 7 along the axial direction. Each engaging part includes two opposing arc-shaped clamps 14. The two arc-shaped clamps 14 can be fixed in the annular groove 13 at the corresponding position of the connecting beam 7, and the two arc-shaped clamps 14 are respectively clamped on both sides of the corresponding partition 6 to axially position the partition 6 and limit the distance between adjacent partitions 6. The two arc-shaped hoops 14 are the first hoop and the second hoop, respectively. The two mating ends of the first hoop are fixed with guide blocks 24, and the two mating ends of the second hoop are provided with insertion holes 23 that are adapted to the guide blocks 24. When the two arc-shaped hoops 14 are fastened, the guide blocks 24 are inserted into the insertion holes 23 to achieve docking guidance. The two mating ends of the first hoop are also fixed with insert plates 17. The insert plates 17 extend along the docking direction of the two hoops and pass through the docking ends of the second hoop. The outer end of the insert plate 17 is provided with a mounting groove 18. The mounting groove 18 is rotatably connected to the pressure arm 20 through a rotating shaft. The outer periphery of the first hoop is fixed with a positioning block 15 corresponding to the position of the pressure arm 20. The positioning block 15 is provided with a hook groove 16, and the pressure arm 20 is provided with a pressing groove 19. An elastic rib is sleeved between the hook groove 16 and the pressing groove 19. The elastic rib can apply a pulling force towards the first hoop to the pressure arm 20 to drive the two arc-shaped hoops 14 to hug and fix them in the annular groove 13. Both the first hoop and the second hoop have rectangular grooves 21 on their outer circumferential surfaces. The two rectangular grooves 21 are arranged opposite each other, and a tension spring 22 is fixedly connected between the two rectangular grooves 21. The tension spring 22 is always in a stretched state to apply a pre-tightening force to the two arc-shaped hoops 14 so that they move closer to each other.

[0037] This specific embodiment also discloses a method for zero-discharge treatment of waste oil regeneration wastewater, using any one of the waste oil regeneration wastewater zero-discharge treatment devices, including the following steps:

[0038] S1. Based on the particle size of the impurities in the waste oil regeneration wastewater to be treated, the gap between multiple baffles is adjusted by the adjustment unit. The two arc-shaped clamps of the locking part are used to hold the baffles in the annular groove of the connecting crossbeam and clamp them on both sides of the baffle to complete the positioning and gap fixing of the baffles, which is adapted to the precision requirements of solid-liquid separation.

[0039] S2. Waste oil regeneration wastewater containing impurities is fed into the conveying unit through the feed hopper, and the input wastewater is received by the cylindrical cavity formed by the internal round holes of multiple stacked partitions.

[0040] S3. Start the drive unit, drive the coupling shaft to drive the auger to rotate synchronously. The rotating auger axially conveys the impurities in the wastewater. At the same time, the coupling cone structure, which gradually thickens from the direction of the feed hopper, squeezes the impurities in the conveying process step by step, squeezing out the water in the impurities. The squeezed wastewater is discharged through the gaps between the partitions, realizing the dry and wet separation of impurities and water in the wastewater.

[0041] S4. The solid slag after extrusion and dehydration is continuously pushed by the auger to the boss at the end of the connecting shaft. Guided by the inclined surface of the boss, the dehydrated solid slag is separated and discharged from the cylindrical cavity of the conveying unit, completing the centralized collection and disposal of the solid slag.

[0042] S5. During the solid slag removal process, the cleaning block of the cleaning unit always adheres to the inclined surface of the boss under the elastic force of the compression spring. The brush bristles on the surface of the cleaning block continuously and dynamically clean the surface of the boss, sweeping off the solid slag attached to the surface of the boss in a timely manner, avoiding the accumulation and adhesion of solid slag, and ensuring the continuous and stable operation of the device.

[0043] Working principle: Before using the device, adjust the spacing between adjacent baffles 6 according to the particle size of impurities in the wastewater to be treated. Fasten the two arc-shaped hoops 14 of the locking part into the annular grooves 13 at the corresponding positions of the connecting beam 7, so that the two arc-shaped hoops 14 are respectively clamped on both sides of the corresponding baffle 6. The elastic rib pulls the pressure arm 20 to drive the two arc-shaped hoops 14 to hug tightly in the annular grooves 13. With the pre-tightening force of the pull spring 22, the positioning of the baffle 6 and the fixing of the filter gap are completed, so as to realize the flexible adjustment of the filtration accuracy. After the gap adjustment is completed, the wastewater containing impurities from the waste oil regeneration to be treated is fed into the cylindrical cavity of the conveying unit through the feed hopper 5. The drive unit 4 is started to drive the connecting shaft 10 and the auger 12 to rotate synchronously. The rotating auger 12 axially conveys the impurities in the wastewater. At the same time, the cone 11 with gradually increasing diameter on the connecting shaft 10 gradually increases the squeezing pressure on the impurities during the conveying process, which fully squeezes out the water trapped inside the impurities. The squeezed water is discharged through the filter gap between the adjacent partitions 6, realizing the dry and wet separation of impurities and water in the wastewater. After being squeezed and dehydrated, the solid residue is axially conveyed by the screw conveyor 12 and pushed to the boss 9 at the end of the connecting shaft 10. It is then discharged from the cylindrical cavity along the conical inclined surface of the boss 9 and collected. As the boss 9 rotates synchronously with the connecting shaft 10, the cleaning block 84 is always in contact with the conical inclined surface of the boss 9 under the elastic thrust of the compression spring 85. The brush bristles 86 on the cleaning block 84 continuously brush the surface of the boss 9, promptly removing the solid residue attached to the surface of the boss 9. This prevents the solid residue from accumulating and sticking, which would affect the continuous and stable operation of the device, and ultimately achieves solid-liquid separation and zero-discharge treatment of waste oil regeneration wastewater.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may utilize the disclosed technical content to make changes or modifications to create equivalent embodiments applicable to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, still fall within the protection scope of the present invention. In the description of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood through specific circumstances.

Claims

1. A zero-discharge treatment device for waste oil recycling wastewater, comprising a support frame (1), characterized in that: A conveying unit is installed on the support frame (1). An extrusion unit is provided inside the conveying unit. A feed hopper (5) is provided at the upper end of the conveying unit. Wastewater containing impurities is fed into the conveying unit from the feed hopper (5). The extrusion unit can be used to squeeze the impurities in the wastewater to separate them into dry and wet states. An adjustment unit is provided inside the conveying unit, which can adjust the gap of the conveying unit.

2. The waste oil regeneration wastewater zero-discharge treatment device according to claim 1, characterized in that: The conveying unit includes a first mounting frame (2) and a second mounting frame (3). The first mounting frame (2) and the second mounting frame (3) are evenly supported and fixedly installed on the support frame (1). A drive unit (4) is installed on the side of the first mounting frame (2) and the second mounting frame (3). Multiple partitions (6) are provided between the first mounting frame (2) and the second mounting frame (3). The gap between the multiple partitions (6) is adjusted by means of an adjustment unit.

3. The waste oil regeneration wastewater zero-discharge treatment device according to claim 2, characterized in that: Four connecting beams (7) are installed between the first mounting frame (2) and the second mounting frame (3). The four connecting beams (7) are sandwiched at the four corners of multiple partitions (6). Multiple partitions (6) are stacked together and their internal round holes form a cylindrical cavity. A connecting shaft (10) is provided inside the cylindrical cavity. The connecting shaft (10) is driven to rotate by the driving unit (4). An auger (12) is provided on the surface of the connecting shaft (10). The connecting shaft (10) rotates and drives the auger (12) to squeeze water in the impurities for dry and wet separation. The gaps between the multiple partitions (6) are used to separate impurities in the water. A cone (11) is provided on the surface of the connecting shaft (10). The connecting shaft (10) gradually becomes thicker from the direction of the feed hopper (5) to facilitate the squeezing of water.

4. The waste oil regeneration wastewater zero-discharge treatment device according to claim 3, characterized in that: The connecting shaft (10) has a boss (9) on its surface near the second mounting frame (3). The inclined surface of the boss (9) near the partition (6) can be used to separate and discharge the impurities that have been squeezed out of the water. A cleaning unit (8) is provided between the connecting beams (7). The cleaning unit (8) can clean the surface of the boss (9) to sweep away the squeezed water impurities and remove them from the boss (9).

5. The waste oil regeneration wastewater zero-discharge treatment device according to claim 4, characterized in that: The cleaning unit (8) includes a fixing plate (81), which is mounted on two connecting beams (7). A round rod (82) and a long rod (83) are slidably inserted on the fixing plate (81). A cleaning block (84) is fixedly connected to the bottom end of the round rod (82) and the long rod (83). The cleaning block (84) can clean the inclined surface of the boss (9). A compression spring (85) is sleeved on the surface of the long rod (83). The two ends of the compression spring (85) are fixed to the cleaning block (84) and the fixing plate (81) respectively. The elastic force of the compression spring (85) can be used to push the cleaning block (84) to make it close to the inclined surface of the boss (9).

6. The waste oil regeneration wastewater zero-discharge treatment device according to claim 5, characterized in that: The surface of the cleaning block (84) is provided with bristles (86), which can be used to clean the inclined surface of the boss (9).

7. The waste oil regeneration wastewater zero-discharge treatment device according to claim 2, characterized in that: The adjustment unit includes annular grooves (13) evenly opened on the surface of the connecting beam (7). A locking part can be provided on the annular groove (13). The two locking parts can be used to clamp the partition (6) on both sides to fix the partition (6) and limit the gap between the two partitions (6).

8. The waste oil regeneration wastewater zero-discharge treatment device according to claim 7, characterized in that: The engaging part includes two arc-shaped clamps (14), which are clamped on the annular groove (13) and fixed to the surface of the connecting beam (7). Guide blocks (24) are fixedly installed at both ends of one of the arc-shaped clamps (14). Insertion holes (23) are provided at both ends of one of the arc-shaped clamps (14). When the two arc-shaped clamps (14) are clamped together, the guide blocks (24) are inserted into the insertion holes (23). Insert plates (17) are fixedly connected to both ends of one of the arc-shaped clamps (14). The insertion plates (17) pass through... Through the two ports of the other arc-shaped hoop (14), the port of the insert plate (17) is provided with an installation groove (18). The pressure arm (20) is rotatably installed inside the installation groove (18). The surface of the arc-shaped hoop (14) fixed to the insert plate (17) is fixedly connected with a positioning block (15). The surface of the positioning block (15) is provided with a hook groove (16). The surface of the pressure arm (20) is provided with a pressing groove (19). An elastic rib is sleeved between the pressing groove (19) and the hook groove (16), and the pressure arm (20) can be fixed by the elastic rib.

9. The waste oil regeneration wastewater zero-discharge treatment device according to claim 8, characterized in that: The surfaces of the two arc-shaped hoops (14) are provided with rectangular grooves (21), and a pull spring (22) is fixedly connected between the two rectangular grooves (21). The pull spring (22) is close to the two arc-shaped hoops (14) and clamped on the surface of the annular groove (13).

10. A method for zero-discharge treatment of waste oil regeneration wastewater, characterized in that: The zero-discharge treatment device for waste oil recycling wastewater according to any one of claims 1-9 includes the following steps: S1. According to the particle size of the impurities in the waste oil regeneration wastewater to be treated, the gap between multiple partitions (6) is adjusted by adjusting the unit. The two arc-shaped hoops (14) of the locking part are clamped on the annular groove (13) of the connecting beam (7) and clamped on both sides of the partition (6) to complete the positioning and gap fixing of the partition (6) to meet the precision requirements of solid-liquid separation. S2. Waste oil regeneration wastewater containing impurities is fed into the conveying unit through the feed hopper (5), and the cylindrical cavity formed by the internal round holes of multiple stacked partitions (6) receives the input wastewater. S3. Start the drive unit (4), drive the connecting shaft (10) to drive the auger (12) to rotate synchronously. The rotating auger (12) axially conveys the impurities in the wastewater. At the same time, in conjunction with the truncated cone (11) structure of the connecting shaft (10) which gradually thickens from the direction of the feed hopper (5), the impurities in the conveying process are squeezed step by step to squeeze out the water in the impurities. The squeezed wastewater is discharged through the gap between the partitions (6) to achieve dry and wet separation of impurities and water in the wastewater. S4. The solid residue after extrusion and dehydration is continuously pushed by the auger (12) to the boss (9) at the end of the connecting shaft (10). Guided by the inclined surface of the boss (9), the dehydrated solid residue is separated and discharged from the cylindrical cavity of the conveying unit, thus completing the centralized collection and disposal of the solid residue. S5. During the solid slag removal process, the cleaning block (84) of the cleaning unit (8) is always in contact with the inclined surface of the boss (9) under the elastic force of the compression spring (85). The brush bristles (86) on the surface of the cleaning block (84) continuously and dynamically clean the surface of the boss (9), and promptly sweep off the solid slag attached to the surface of the boss (9) to avoid the accumulation and adhesion of solid slag and ensure the continuous and stable operation of the device.

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