A closed cycle recovery system and method for defatted process waste liquid

Abstract

The embodiment of the application provides a closed cycle recovery system and method for defatted process waste liquid, which comprises a pipe cleaning assembly and a recovery assembly; the recovery assembly comprises a pump body; the pipe cleaning assembly comprises a pipe body, a first leather cup, a second leather cup and a liquid inlet pipe; the input end of the pump body is connected with the pipe body, the pipe body is connected with the liquid inlet pipe, the outer side of the liquid inlet pipe is provided with the first leather cup and the second leather cup, and the end of the liquid inlet pipe away from the pump body penetrates through the first leather cup. It relates to the field of closed recovery of industrial process liquid. The full-closed cycle recovery of industrial process liquid is realized: the liquid inlet pipe penetrates through the first leather cup, the double-leather-cup sealing structure is combined with the flexible pipe body, waste liquid is directly sucked to the recovery device through the input end of the pump body, there is no open discharge link, secondary pollution is completely eliminated, and the recovery rate is significantly improved compared with the prior art.

Description

Technical Field

[0001] This invention relates to the field of closed-loop recycling of industrial process liquids, specifically to a closed-loop recycling system and method for degreasing process waste liquid. Background Technology

[0002] In the current field of closed-loop recycling of industrial process liquids, especially in the degreasing process of metal surface treatment, the waste liquid generated contains a large amount of emulsified oil, alkaline substances, and solid residues. This waste liquid is typically treated through open discharge, manual suction, or simple filtration. Due to the strong adhesion of residues on the inner wall of the degreasing pipes, conventional recycling equipment cannot thoroughly clean the pipes, resulting in low waste liquid recovery rates (usually below 70%) and a large amount of waste liquid remaining in the pipes, causing secondary pollution. Furthermore, existing technologies mostly employ open circulation or intermittent suction, making it difficult to achieve a fully closed-loop circulation of liquid between the pipe and the recycling device. This leads to increased environmental pollution, serious water waste, high reagent consumption, and the need for frequent pipe disassembly during operation. These shortcomings not only increase the environmental governance costs for enterprises but also fail to meet the green and efficient requirements of closed-loop recycling of industrial process liquids. Therefore, there is an urgent need for a dedicated system that can simultaneously complete pipe cleaning and closed-loop waste liquid recovery.

[0003] In existing degreasing process waste liquid recovery systems, in closed-loop recovery operations, auxiliary recovery devices must be installed at the other end of the pipeline or manual cleaning must be performed in order to complete the recovery of degreasing liquid. This results in the need for multiple people to work together and for both ends to operate simultaneously, making the process complex and inefficient. Furthermore, a single person cannot independently complete the closed-loop recovery from one end of the pipeline, leading to problems such as high labor costs, long downtime, poor operational safety, and serious waste of resources. Summary of the Invention

[0004] According to embodiments of the present invention, a closed-loop recycling system and method for degreasing process waste liquid are provided. This addresses the technical problems existing in the background art described above.

[0005] In a first aspect of the invention, a closed-loop recycling system for degreasing process waste liquid is provided.

[0006] The closed-loop recycling system for the degreasing process waste liquid includes a pigging assembly and a recycling assembly; The recycling component includes a pump body; The pigging assembly includes a tube body, a first cup, a second cup, and an inlet tube; The input end of the pump body is connected to the pipe body, the pipe body is connected to the inlet pipe, and the inlet pipe is provided with a first cup and a second cup on the outside of the inlet pipe. The end of the inlet pipe away from the pump body passes through the first cup.

[0007] Preferably, the recycling assembly further includes a cover plate, which is detachably connected to the end of the pipe to be cleaned, and the cover plate is provided with a gas connection port and a through hole for the pipe body to pass through.

[0008] Preferably, the recycling assembly further includes a support and a take-up roller; The bracket is rotatably connected to the winding roller, the tube is wound around the winding roller, and a drive shaft is provided on the winding roller; The drive shaft is connected to an external drive component, and the tube is wound up by controlling the rotation of the drive shaft.

[0009] Preferably, it also includes two sets of support components and a control unit; The support assembly includes an annular pipe, a branch pipe, and a solenoid valve; The two annular tubes are respectively disposed on the outer circumferential surfaces of the first and second diaphragm cups. The annular tubes are actually in contact with the inner wall of the pipe to be cleaned. The inner side of the annular tubes is connected to the branch pipe. The end of the branch pipe near the geometric center of the annular tube is connected to the solenoid valve. The control unit is communicatively connected to the solenoid valve. The control unit is used to control the opening and closing of the solenoid valve. The control unit adjusts the contact state between the annular pipe and the inner wall of the pipe by charging and decharging the annular pipe, so that the return stroke of the cleaning assembly is smoother during reciprocating motion.

[0010] Preferably, the pigging assembly further includes a fixing part, a rotating part, a cap, and a connecting part; The fixing part is connected to the second leather cup, and the fixing part is provided with a protrusion. The outer wall of the protrusion is rotatably connected to the inner side of the connecting part. The connecting part is connected to the rotating part, and the rotating part is connected to the first leather cup. The inner sides of the fixing part, the protrusion, the connecting part and the rotating part are provided with cavities that can accommodate the liquid inlet pipe to pass through. The inner side of the rotating part is connected to a cap, and the cap is rotatably connected to the liquid inlet pipe.

[0011] Preferably, the assembly further includes a cleaning component, which comprises a plurality of cleaning plates and a closed shell. The length direction of the plurality of cleaning plates is parallel to the axial direction of the rotating part. The plurality of cleaning plates are disposed on the closed shell, which is connected to the rotating part. The inner side of the closed shell is rotatably connected to the protruding outer wall.

[0012] Preferably, it also includes a passive drive assembly, which includes an air intake, a spiral air intake, and a turbine; The air inlet is located on the fixed part, the spiral air inlet is located on the protrusion, the inner side of the turbine is in contact with the outer wall of the protrusion, and the turbine is connected to the connecting part.

[0013] Preferably, the passive drive assembly further includes an exhaust pipe and a one-way valve; The turbine is disposed in a cavity formed by the enclosed shell, the protrusion and the rotating part. The exhaust pipe communicates with the cavity and passes through the rotating part. The one-way valve is connected to the exhaust pipe and restricts the gas to be discharged to the outside only from the cavity.

[0014] In a second aspect of the invention, a closed-loop recycling method for degreasing process waste liquid is provided.

[0015] The method includes: S1. Connect the cover plate of the recycling component to one end of the pipe to be cleaned, and start the pump to create negative pressure in the pipe and the inlet pipe; S2. Under negative pressure, the cleaning assembly moves forward along the pipeline. The first and second diaphragm cups fit against the inner wall of the pipeline to form a seal. At the same time, the degreasing process waste liquid in the pipeline is drawn into the recovery assembly through the inlet pipe and the pipe body, realizing the simultaneous cleaning and closed-loop recovery of waste liquid. S3. When the pigging assembly reaches the other end of the pipeline, the control unit controls the solenoid valve of the support assembly to open, so that the annular pipe can release air to reduce the friction with the inner wall of the pipeline; at the same time, the drive shaft controls the winding roller to wind up the pipe body, so that the pigging assembly returns under low resistance. S4. During the return trip, the impurities retained in the annular space between the first and second rubber cups are completely carried out of the pipeline by the cleaning component and finally recovered by the pump body to the recovery component, completing the closed-loop recycling of the entire degreasing process waste liquid.

[0016] Preferably, step S2 also includes the operation process of the passive drive component: Gas enters the air inlet of the fixed part through the gas connection port of the cover plate, and is then tangentially injected through the spiral air inlet on the protrusion, driving the turbine to rotate. The turbine drives the connecting part and the rotating part to rotate synchronously, so that multiple cleaning plates set on the sealed shell scrape off the stubborn impurities attached to the inner wall of the pipe. The scraped impurities are temporarily retained in the annular space between the first and second diaphragm cups, and are completely carried out and recovered when the cleaning assembly returns.

[0017] One or more technical solutions provided in this application have at least the following technical effects or advantages: The present invention provides a closed-loop recycling system and method for degreasing process waste liquid, realizing the fully closed-loop recycling of industrial process liquid: the inlet pipe passes through the first sump, combined with the double sump sealing structure and flexible pipe body, so that the waste liquid is directly drawn into the recycling device through the pump input end, without open discharge links, completely eliminating secondary pollution, and the recovery rate is significantly improved compared with the prior art.

[0018] Operation can be completed by a single person on one side: No auxiliary equipment or personnel are required at the other end of the pipeline. Only one person is needed on one end to achieve closed-loop recovery and cleaning of degreasing fluid, which greatly reduces labor costs, shortens downtime, and improves the convenience and safety of operation.

[0019] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of the present invention, nor is it intended to restrict the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0020] The above and other features, advantages, and aspects of the various embodiments of the present invention will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein: Figure 1 A three-dimensional connection structure diagram of a closed-loop recycling system for degreasing process waste liquid according to an embodiment of the present invention is shown; Figure 2 An exploded view of a closed-loop recycling system for degreasing process waste liquid according to an embodiment of the present invention is shown; Figure 3 A cross-sectional view of a closed-loop recycling system for degreasing process waste liquid according to an embodiment of the present invention is shown; Figure 4 A three-dimensional connection structure schematic diagram of a closed-loop recycling system for degreasing process waste liquid according to an embodiment of the present invention is shown from another perspective. Figure 5 A schematic diagram of the planar connection structure of a closed-loop recycling system for degreasing process waste liquid according to an embodiment of the present invention is shown. Figure 6 A partial cross-sectional view of a closed-loop recycling system for degreasing process waste liquid according to an embodiment of the present invention is shown; Figure 7 A schematic diagram of the connection structure of the active drive component of a closed-loop recycling system for degreasing process waste liquid according to an embodiment of the present invention is shown. Figure 8 An exploded view of the active drive component of a closed-loop recycling system for degreasing process waste liquid according to an embodiment of the present invention is shown. Figure 9 A schematic diagram of the connection structure of the support components of a closed-loop recycling system for degreasing process waste liquid according to an embodiment of the present invention is shown. Figure 10 A schematic diagram of the connection structure of the cleaning component of a closed-loop recycling system for degreasing process waste liquid according to an embodiment of the present invention is shown. Figure 11A flowchart of a closed-loop recycling method for degreasing process waste liquid according to an embodiment of the present invention is shown.

[0021] The attached figures are labeled as follows: 1-Recovery assembly, 11-Rewinding roller, 111-Drive shaft, 12-Pump body, 13-Cover plate, 131-Gas connection port, -Through hole, 14-Bracket, 2-Pipe cleaning assembly, 21-Pipe body, 22-First cup, 23-Inlet pipe, 24-Second cup, 25-Fixing part, 251-Protrusion, 26-Rotating part, 27-Cap, 28-Connecting part, 5-Support assembly, 51-Annular pipe, 52-Solenoid valve, 53-Branch pipe, 6-Cleaning assembly, 61- Trigger ring, 610-Second trapezoidal block, 611-Enclosed shell, 62-Cylinder block, 63-Damping rod, 64-First spring, 65-Protrusion, 651-Through groove, 66-Rod body, 67-Second spring, 68-Clean plate, 69-First trapezoidal block, 7-Active drive assembly, 71-Motor, 72-First gear, 73-Second gear, 8-Passive drive assembly, 81-Helical air intake, 82-Air intake, 83-Turbine, 84-Exhaust pipe, 85-One-way valve. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0024] like Figures 1 to 10 As shown, the closed-loop recycling system for the degreasing process waste liquid includes a recycling component 1 and a pigging component 2.

[0025] The recovery assembly 1 includes a pump body 12, a cover plate 13, a support 14, and a take-up roller 11. The pump body 12 provides suction power, and its input end is connected to the cleaning assembly 2 via a pipe 21. The cover plate 13 is detachably connected to the end of the pipe to be cleaned via a flange or snap-fit. The cover plate 13 has a gas connection port 131 and a through hole for the pipe 21 to pass through. A sealing ring is provided at the through hole to ensure that the entire system remains closed during operation, preventing waste liquid leakage or gas escape. The support 14 is rotatably connected to the take-up roller 11. The pipe 21 is made of flexible tubing and wound around the take-up roller 11. A drive shaft 111 is located at the center of the take-up roller 11. The drive shaft 111 is connected to an external drive component such as a motor. By controlling the forward and reverse rotation of the drive shaft 111, the pipe 21 can be automatically wound or unwound, facilitating single-person operation and long-distance pipeline work.

[0026] The cleaning assembly 2 includes a tube body 21, a first cup 22, a second cup 24, an inlet tube 23, a fixing part 25, a rotating part 26, a cap 27, a connecting part 28, a support assembly 5, a cleaning assembly 6, and a passive drive assembly 8.

[0027] One end of the inlet pipe 23 is connected to the pipe body 21, and the other end passes through the first cup 22 and extends into the pipe to be cleaned. The first cup 22 and the second cup 24 are respectively fitted on the outside of the inlet pipe 23, and the two are arranged at intervals along the axial direction of the inlet pipe 23 to form a bidirectional sealing structure. The fixing part 25 is fixedly connected to the second cup 24, and a cylindrical protrusion 251 is provided on the fixing part 25. The outer wall of the protrusion 251 is rotatably connected to the inner side of the connecting part 28 through a bearing. The other end of the connecting part 28 is fixedly connected to the rotating part 26, and the rotating part 26 is then fixedly connected to the first cup 22. The fixing part 25, the protrusion 251, the connecting part 28, and the inner side of the rotating part 26 together form a through cavity for the inlet pipe 23 to pass through. A cap 27 is also fixedly connected to the inner side of the rotating part 26. The cap 27 is rotatably connected to the inlet pipe 23 through a rotary sealing structure to ensure that the waste liquid enters the pipe body 21 only through the inlet pipe 23 and does not leak from the rotation gap.

[0028] Two sets of support components 5 are provided, corresponding to the first cup 22 and the second cup 24 respectively. Each set of support components 5 includes an annular tube 51, a branch tube 53, and a solenoid valve 52. The two annular tubes 51 are fixed to the outer circumferential surfaces of the first cup 22 and the second cup 24 respectively, and the outer surface of the annular tube 51 is in direct contact with the inner wall of the pipe to be cleaned. The annular tube 51 is made of elastic material, and its inner side is connected to an external air source through the branch tube 53. A solenoid valve 52 is provided at one end of the branch tube 53 near the geometric center of the annular tube 51. The control unit is communicatively connected to the solenoid valve 52, and controls the opening and closing of the solenoid valve 52 to inflate or deflate the annular tube 51, thereby adjusting the outer diameter of the annular tube 51 and the contact pressure with the inner wall of the pipe. During the return phase of the reciprocating motion of the pigging assembly 2, the control unit controls the annular pipe 51 to release air, which significantly reduces the friction between it and the inner wall of the pipe, making the return smoother. An air inlet is provided on the annular pipe 51. After one cycle is completed, gas is injected into the annular pipe 51 through the air inlet by means of manual means or external air pump.

[0029] The pigging assembly 2 also includes a cleaning assembly 6. The cleaning assembly 6 includes multiple cleaning plates 68 and a sealing shell 611. The length direction of the multiple cleaning plates 68 is parallel to the axis of the rotating part 26, and their outer edges are close to the inner wall of the pipe, evenly distributed circumferentially and fixed to the sealing shell 611. The sealing shell 611 is fixedly connected to the rotating part 26, and its inner side is rotatably connected to the outer wall of the protrusion 251 via a bearing, thereby enabling the cleaning assembly 6 to rotate with the rotating part 26 around the axis of the inlet pipe 23 to scrape and clean residue from the inner wall of the pipe.

[0030] The passive drive assembly 8, used to drive the cleaning assembly 6 to rotate, includes an air inlet 82, a spiral air inlet 81, a turbine 83, an exhaust pipe 84, and a one-way valve 85. The air inlet 82 is located on the fixed part 25 and communicates with the gas connection port 131 of the cover plate 13 via a pipe. The spiral air inlet 81 is located on the protrusion 251; gas enters through the air inlet 82 and is tangentially ejected along the spiral air inlet 81, driving the turbine 83 to rotate at high speed. The inner side of the turbine 83 is tightly attached to the outer wall of the protrusion 251 and is fixedly connected to the connecting part 28, thereby driving the connecting part 28, the rotating part 26, and the cleaning assembly 6 to rotate synchronously. The turbine 83 is housed within a sealed cavity formed by the enclosed shell 611, the protrusion 251, and the rotating part 26. Gas within the cavity is discharged through the exhaust pipe 84, which passes through the rotating part 26 and has a one-way valve 85 at its outlet. The one-way valve 85 only allows gas to be discharged from the cavity to the outside in one direction, preventing backflow of external gas.

[0031] In this embodiment, the diameter of the air inlet 82 is preferably 8 mm to ensure sufficient compressed air flow; the diameter of the spiral air inlet 81 is 3 mm, the spiral helix angle is 45°, and four spiral air inlets 81 are evenly distributed along the circumference of the outer wall of the protrusion 251. This size setting allows the turbine 83 to obtain a stable rotational torque, ensuring that the cleaning assembly 6 rotates at an appropriate speed, while avoiding excessive gas flow that could lead to unstable system pressure.

[0032] In actual use, the operator only needs to complete all operations at one end of the pipeline. The specific process is as follows: Fix the cover plate 13 to one end of the pipeline to be cleaned, and insert the pipe body 21 into the pipeline through the through hole of the cover plate 13. Start the pump body 12, which generates negative pressure in the pipe body 21 and the inlet pipe 23. The waste liquid is drawn into the pipe body 21 through the inlet pipe 23 and finally enters the recovery device, while pushing the cleaning assembly 2 forward along the pipeline. The first cup 22 and the second cup 24 form a seal against the inner wall of the pipeline, realizing the recovery of waste liquid while advancing. During the forward movement, compressed air is introduced through the gas connection port 131. The gas drives the turbine 83 to rotate through the air inlet 82 and the spiral air inlet 81 in sequence, which drives the cleaning assembly 6 to rotate synchronously. Multiple cleaning plates 68 are mainly used to scrape off stubborn impurities (such as emulsified grease, alkaline scale, etc.) that are difficult to be directly washed away by liquid on the inner wall of the pipeline. Impurities scraped off by the cleaning plate 68 cannot be sucked away by the pump body 12 through the inlet pipe 23. Instead, they are temporarily retained in the annular space between the first and second cups 22 and are pushed forward by the cleaning assembly 2. When the cleaning assembly 2 reaches the other end of the pipeline, the control unit controls the solenoid valve 52 to release air, the annular pipe 51 contracts, and the friction is reduced. At the same time, the pump body 12 reverses or the external drive component drives the winding roller 11 to wind up the pipe body 21, so that the cleaning assembly 2 returns quickly under low resistance. During the return process, the impurities retained in the annular space between the first and second cups 24 are carried out of the pipeline along with the cleaning assembly 2 and are finally completely recovered by the pump body 12. The entire process does not require any auxiliary personnel or equipment at the other end of the pipeline. The waste liquid always circulates in a closed system with no open discharge, completely avoiding secondary pollution. This embodiment, through the above-described structure and control method, enables a single person to complete the closed-loop recycling and thorough cleaning of waste liquid from the degreasing process pipeline, significantly improving operational efficiency, reducing labor costs and environmental protection expenses, and fully meeting the actual needs of closed-loop recycling of industrial process liquids.

[0033] In this embodiment, the cleaning assembly 6 adopts a radially telescopic trigger-type structure, wherein the multiple cleaning plates 68 are no longer fixed to the enclosed shell 611. The cleaning assembly 6 also includes a trigger ring 61, a cylinder 62, a damping rod 63, a first spring 64, a protrusion 65, a rod 66, a second spring 67, a first trapezoidal block 69, a second trapezoidal block 610, and a through groove 651 formed on the side of the protrusion 65. The inner wall of the trigger ring 61 slides against the outer wall of the enclosed shell 611, and the inner side of the trigger ring 61 contacts the outer wall of the cylinder 62. One end of the damping rod 63 is fixedly disposed in the inner cavity of the cylinder 62, and the other end is fixedly connected to the enclosed shell 611. The two ends of the first spring 64 are respectively connected to the inner bottom wall of the cylinder 62 and the end of the damping rod 63, providing damping and restoring force for the trigger ring 61. A second trapezoidal block 610 is fixedly connected to the inner side of the trigger ring 61, and the inclined surface of the second trapezoidal block 610 contacts and engages with the inclined surface of the first trapezoidal block 69. The protruding end of the first trapezoidal block 69 passes through the through groove 651 on the side of the protrusion 65 and is fixedly connected to the cleaning plate 68, so that the first trapezoidal block 69 can drive the cleaning plate 68 to move synchronously in the radial direction, that is, in the direction perpendicular to the axis of the rotating part 26. The protrusion 65 is fixedly connected to the closed shell 611, and its inner wall is slidably engaged with the outer wall of the cleaning plate 68; a rod 66 is fixedly connected to one side of the protrusion 65, and the outer wall of the rod 66 is slidably connected to the through hole opened on the cleaning plate 68. The second spring 67 is sleeved on the rod 66, and its two ends abut against the protrusion 65 and the cleaning plate 68 respectively, providing radial retraction force for the cleaning plate 68. When the outer trigger ring 61 contacts the clump-like impurities adhering to the inner wall of the pipe to be cleaned, the trigger ring 61 moves axially relative to the sealing shell 611, causing the second trapezoidal block 610 to push the first trapezoidal block 69 along the inclined plane. This causes the first trapezoidal block 69 and the multiple cleaning plates 68 connected to it to move radially away from the geometric center of the sealing shell 611, thereby extending the cleaning plates 68 to the working cleaning position to effectively scrape off the stubborn deposits on the inner wall of the pipe. After cleaning, the second spring 67 and the first spring 64 work together to reset the trigger ring 61, while simultaneously causing the cleaning plates 68 to retract radially to the non-working position. This structure allows the cleaning plates 68 to be activated only when needed for targeted cleaning, avoiding constant extension that could affect the forward speed of the pigging assembly 2.

[0034] In this embodiment, an active drive component 7 and a passive drive component 8 are added, allowing the two drive methods to operate simultaneously or independently. The active drive component 7 includes a motor 71, a first gear 72, and a second gear 73. The second gear 73 is fixedly connected to the outer wall of the connecting part 28 and can rotate synchronously with the connecting part 28 and the rotating part 26. The first gear 72 meshes with the second gear 73 for transmission. The shaft of the first gear 72 is connected to the output shaft of the motor 71 via a one-way clutch. The fixed end of the motor 71 is mounted on the protrusion 251 via a bracket. A battery assembly is also provided at the end of the protrusion 251 to provide power to the motor 71. The one-way clutch allows the first gear 72 to rotate freely while the passive drive component 8 drives the second gear 73 to rotate, without dragging the motor 71 in the opposite direction. This prevents the motor from jamming or being damaged, ensuring that the two drive methods do not interfere with each other and can operate reliably simultaneously or independently.

[0035] In actual use, the operator only needs to complete all the work at one end of the pipeline. The specific process is as follows: The cover plate 13 is fixed to one end of the pipe to be cleaned, and the pipe body 21 is inserted into the pipe through the through hole. The pump body 12 is started, which generates negative pressure in the pipe body 21 and the inlet pipe 23. The waste liquid is drawn into the pipe body 21 through the inlet pipe 23 and finally enters the recovery device, while pushing the cleaning assembly 2 forward along the pipe. The first cup 22 and the second cup 24 are tightly pressed against the inner wall of the pipe to form a seal, realizing the closed-loop recovery of waste liquid while it is being pushed forward.

[0036] During the forward movement, when the outer edge of the trigger ring 61 contacts the clump-like stubborn impurities attached to the inner wall of the pipe, the trigger ring 61 moves axially relative to the closed shell 611. Through the inclined surface cooperation between the second trapezoidal block 610 and the first trapezoidal block 69, multiple cleaning plates 68 are automatically extended radially to the cleaning working position to effectively scrape off the attached impurities (such as emulsified oil stains and alkaline scale) that are difficult to be directly washed away by liquid. At the same time, the passive drive component 8 and / or the active drive component 7 can be activated as needed: gas enters the air inlet 82 through the gas connection port 131, and then is tangentially injected by the spiral air inlet 81 to drive the turbine 83 to rotate, or the motor 71 powered by the battery component drives the first gear 72 and the second gear 73 to drive the connecting part 28 to rotate (the one-way clutch ensures that the motor 71 can freely rotate during passive drive and does not jam in the reverse direction), so that the cleaning component 6 rotates at high speed, further enhancing the scraping effect. The impurities scraped off by the cleaning plate 68 cannot be sucked away by the inlet pipe 23, but are temporarily retained in the annular space between the first cup 22 and the second cup 24, and are pushed forward with the cleaning assembly 2.

[0037] Once the pigging assembly 2 reaches the other end of the pipeline, the control unit opens the solenoid valve 52, causing the annular pipe 51 to deflate and contract, reducing friction with the inner wall of the pipeline. Simultaneously, the drive shaft 111 controls the take-up roller 11 to rewind the pipe body 21, allowing the pigging assembly 2 to return quickly under low resistance. During the return process, impurities retained in the annular space between the first cup 22 and the second cup 24 are completely carried out of the pipeline along with the pigging assembly 2 and ultimately recovered by the pump body 12 to the recovery device. After one cycle is completed, the pipe can be re-inflated through the air inlet on the annular pipe 51 using manual or external air pump methods to restore the support state for the next cycle.

[0038] The entire process requires no auxiliary personnel or equipment at the other end of the pipeline. The waste liquid remains in a closed-loop circulation state with no open discharge, completely avoiding secondary pollution. This implementation method achieves intelligent cleaning and efficient closed-loop recovery of stubborn impurities adhering to the inner wall of the pipeline through the on-demand radial telescopic cleaning plate driven by the trigger ring 61, the active / passive dual-drive complementary rotation mechanism, and the inflation and deflation control of the support components. This significantly improves work efficiency and the thoroughness of pipeline cleaning, and is particularly suitable for complex working conditions in degreasing process pipelines where there are a large amount of clump residue.

[0039] like Figure 11 As shown, another embodiment of the present invention also provides a closed-loop recycling method for degreasing process waste liquid: In this embodiment, the closed-loop recycling method for degreasing process waste liquid of the present invention is specifically implemented as follows: S1. Connect the cover plate 13 of the recycling component 1 to one end of the pipe to be cleaned, and start the pump body 12 to create a negative pressure in the pipe body 21 and the inlet pipe 23; S2. Under negative pressure, the cleaning assembly 2 advances along the pipeline. The first and second cups 24 seal against the inner wall of the pipeline, while simultaneously drawing the degreasing waste liquid from the pipeline through the inlet pipe 23 and the pipe body 21 to the recovery assembly 1, achieving simultaneous cleaning and closed-loop waste liquid recovery. During the advance of step S2, when the outer edge of the trigger ring 61 contacts the clump-like stubborn impurities attached to the inner wall of the pipeline, the trigger ring 61 moves axially relative to the closed shell 611. This causes the second trapezoidal block 610 to push the first trapezoidal block 69, causing multiple cleaning plates 68 to automatically extend radially away from the axis. Upon reaching the cleaning position, the system scrapes away the adhering impurities that are difficult to flush from the inner wall of the pipe. Simultaneously, the passive drive assembly 8 and / or the active drive assembly 7 can be activated: gas enters the air inlet 82 of the fixed part 25 through the gas connection port 131 of the cover plate 13, and then is tangentially injected through the spiral air inlet 81 on the protrusion 251 to drive the turbine 83 to rotate, or the motor 71 drives the first gear 72 and the second gear 73 to drive the connecting part 28 to rotate, so that the cleaning assembly 6 rotates at high speed to enhance the scraping effect; the impurities scraped by the cleaning plate 68 are temporarily retained in the annular space between the first diaphragm cup 22 and the second diaphragm cup 24. S3. When the pigging assembly 2 reaches the other end of the pipeline, the control unit controls the solenoid valve 52 of the support assembly 5 to open, so that the annular pipe 51 releases air to reduce the friction with the inner wall of the pipeline; at the same time, the drive shaft 111 controls the winding roller 11 to wind up the pipe body 21, so that the pigging assembly 2 returns in a low-resistance state. S4. During the return process, the impurities retained in the annular space between the first cup 22 and the second cup 24 are completely carried out of the pipeline by the cleaning component 2 and finally recovered by the pump body 12 to the recovery component 1, completing the closed-loop recycling of the entire degreasing process waste liquid.

[0040] Using the above method, only one person is needed to complete all recycling and cleaning operations at one end of the pipeline. The operation is simple and efficient, and the waste liquid achieves a completely closed-loop circulation with no open discharge links, which fully meets the actual needs of closed-loop recycling of industrial process liquids.

[0041] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A closed-loop recycling system for degreasing process waste liquid, characterized in that, Includes a pigging assembly (2) and a recovery assembly (1); The recycling component (1) includes a pump body (12); The cleaning assembly (2) includes a tube body (21), a first cup (22), a second cup (24), and an inlet tube (23); The input end of the pump body (12) is connected to the pipe body (21), the pipe body (21) is connected to the liquid inlet pipe (23), the outside of the liquid inlet pipe (23) is provided with the first cup (22) and the second cup (24), and the end of the liquid inlet pipe (23) away from the pump body (12) passes through the first cup (22).

2. The closed-loop recycling system for degreasing process waste liquid according to claim 1, characterized in that, The recycling component (1) also includes a cover plate (13), which is detachably connected to the end of the pipe to be cleaned. The cover plate (13) is provided with a gas connection port (131) and a through hole for the pipe body (21) to pass through.

3. The closed-loop recycling system for degreasing process waste liquid according to claim 1, characterized in that, The recycling assembly (1) also includes a support (14) and a take-up roller (11). The bracket (14) is rotatably connected to the take-up roller (11), the tube (21) is wound around the take-up roller (11), and a drive shaft (111) is provided on the take-up roller (11). The drive shaft (111) is connected to an external drive component, and the tube (21) is wound up by controlling the rotation of the drive shaft (111).

4. The closed-loop recycling system for degreasing process waste liquid according to claim 1, characterized in that, It also includes two sets of support components (5) and a control unit; The support assembly (5) includes an annular pipe (51), a branch pipe (53), and a solenoid valve (52); Two annular tubes (51) are respectively disposed on the outer circumferential surfaces of the first cup (22) and the second cup (24). The annular tubes (51) are actually in contact with the inner wall of the pipe to be cleaned. The inner side of the annular tubes (51) is connected to the branch pipe (53). The end of the branch pipe (53) near the geometric center of the annular tubes (51) is connected to the solenoid valve (52). The control unit is communicatively connected to the solenoid valve (52). The control unit is used to control the opening and closing of the solenoid valve (52). The control unit adjusts the contact state between the annular pipe (51) and the inner wall of the pipe by charging and decharging the annular pipe (51), so that the cleaning assembly (2) can return more smoothly during reciprocating motion.

5. The closed-loop recycling system for degreasing process waste liquid according to claim 1, characterized in that, The pigging assembly (2) also includes a fixing part (25), a rotating part (26), a cap (27) and a connecting part (28). The fixing part (25) is connected to the second leather cup (24). The fixing part (25) is provided with a protrusion (251). The outer wall of the protrusion (251) is rotatably connected to the inner side of the connecting part (28). The connecting part (28) is connected to the rotating part (26). The rotating part (26) is connected to the first leather cup (22). The inner sides of the fixing part (25), the protrusion (251), the connecting part (28) and the rotating part (26) are provided with cavities that can accommodate the liquid inlet pipe (23) to pass through. The inner side of the rotating part (26) is connected to a cap (27), and the cap (27) is rotatably connected to the liquid inlet pipe (23).

6. The closed-loop recycling system for degreasing process waste liquid according to claim 5, characterized in that, It also includes a cleaning assembly (6), which includes a plurality of cleaning plates (68) and a closed shell (611). The length direction of the plurality of cleaning plates (68) is parallel to the axial direction of the rotating part (26). The plurality of cleaning plates (68) are disposed on the closed shell (611). The closed shell (611) is connected to the rotating part (26). The inner side of the closed shell (611) is rotatably connected to the outer wall of the protrusion (251).

7. The closed-loop recycling system for degreasing process waste liquid according to claim 6, characterized in that, It also includes a passive drive assembly (8), which includes an air intake (82), a spiral air intake (81), and a turbine (83). The air inlet (82) is opened on the fixed part (25), the spiral air inlet (81) is set on the protrusion (251), the inner side of the turbine (83) is in contact with the outer wall of the protrusion (251), and the turbine (83) is connected to the connecting part (28).

8. The closed-loop recycling system for degreasing process waste liquid according to claim 7, characterized in that, The passive drive assembly (8) also includes an exhaust pipe (84) and a one-way valve (85). The turbine (83) is disposed in a cavity formed by the enclosed shell (611), the protrusion (251) and the rotating part (26). The exhaust pipe (84) communicates with the cavity and passes through the rotating part (26). The one-way valve (85) is connected to the exhaust pipe (84) and restricts the gas to be discharged to the outside only from the cavity.

9. A closed-loop recycling method for degreasing process waste liquid, characterized in that, This method, applied to a closed-loop recycling system for degreasing process waste liquid according to any one of claims 1 to 8, includes the following steps: S1. Connect the cover plate (13) of the recycling component (1) to one end of the pipe to be cleaned, and start the pump body (12) to create a negative pressure in the pipe body (21) and the inlet pipe (23); S2. The cleaning assembly (2) moves forward along the pipeline under negative pressure. The first cup (22) and the second cup (24) are sealed against the inner wall of the pipeline. At the same time, the degreasing process waste liquid in the pipeline is drawn into the recovery assembly (1) through the inlet pipe (23) and the pipe body (21), so as to realize the closed-loop recovery of waste liquid while cleaning the pipeline. S3. When the pigging assembly (2) reaches the other end of the pipeline, the control unit controls the solenoid valve (52) of the support assembly (5) to open, so that the annular pipe (51) releases air to reduce the friction with the inner wall of the pipeline; at the same time, the drive shaft (111) controls the winding roller (11) to wind up the pipe body (21), so that the pigging assembly (2) returns in a low-resistance state. S4. During the return process, the impurities retained in the annular space between the first rubber cup (22) and the second rubber cup (24) are completely carried out of the pipeline by the cleaning component (2) and finally recovered by the pump body (12) to the recovery component (1), thus completing the closed-loop recycling of the entire degreasing process waste liquid.

10. The closed-loop recycling method for degreasing process waste liquid according to claim 9, characterized in that: Step S2 also includes the operation of the passive drive component (8): Gas enters the air inlet (82) of the fixed part (25) through the gas connection port (131) of the cover plate (13), and is then tangentially injected through the spiral air inlet (81) on the protrusion (251), driving the turbine (83) to rotate. The turbine (83) drives the connecting part (28) and the rotating part (26) to rotate synchronously, so that multiple cleaning plates (68) set on the closed shell (611) scrape off the stubborn impurities attached to the inner wall of the pipe. The scraped impurities are temporarily retained in the annular space between the first cup (22) and the second cup (24), and are completely carried out and recovered when the cleaning assembly (2) returns.

Images