A cleaning and efficient cleaning device for spandex production and operation method

Abstract

This invention relates to the field of cleaning equipment technology, specifically to a clean and efficient cleaning device and operating method for spandex production. The device includes a cleaning tank with an injection pipe at its inlet for injecting DMAC solvent. Inside the tank is a rotating tube capable of rotation, and inside the rotating tube is a placement rack capable of moving laterally along the tube. The placement rack is used to place tubular materials. The inner wall of the rotating tube has multiple connecting plates connected to it. Compared with existing technologies, this clean and efficient cleaning device and operating method for spandex production completely eliminates the environmental pollution caused by the large amount of DMAC volatilization generated when the workpiece is lifted out after cleaning during the component cleaning process, reducing the subsequent collection and disposal costs due to air pollution.

Description

Technical Field

[0001] This invention relates to the field of cleaning equipment technology, specifically to a clean and efficient cleaning device and operating method for spandex production. Background Technology

[0002] Traditional cleaning equipment involves placing the workpieces to be cleaned (such as components, spinnerets, and filter elements) into a cleaning tank, adding the solvent DMAC, and heating to approximately 120°C for immersion or low-flow circulation cleaning. After cleaning, the tank needs to be opened and the workpieces removed. At this point, the temperature has not yet fully cooled to room temperature, and due to the material and shape of the workpieces, a significant amount of DMAC may remain, carried out of the tank and volatilizing into the workshop environment. Furthermore, because the workpieces need to be moved, it is difficult to install environmental control facilities such as exhaust hoods, often resulting in a large amount of DMAC volatilizing into the cleaning room air in a short period, causing concentrations to exceed standards and posing environmental and occupational health hazards. Even after ventilation, the contaminated indoor air discharged from the cleaning room still requires further purification before being released into the atmosphere. The difficulty and cost of treatment increase significantly after dilution by room air. If further water washing is performed in the original cleaning tank, waste solvent and wastewater will mix, resulting in inconsistent discharge destinations requiring manual operation. In case of operational errors, this can lead to accidents involving the mixing of wastewater and waste solvent, causing anything from malfunctions in solvent refining to the complete shutdown of the wastewater treatment plant. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a clean and efficient cleaning device and operating method for spandex production, solving the problems mentioned in the background section.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a clean and efficient cleaning device for spandex production, comprising a cleaning tank, wherein the inlet end of the cleaning tank is provided with an injection pipe for injecting DMAC solvent, the inside of the cleaning tank is provided with a rotating tube that rotates, and the inside of the rotating tube is provided with a placement rack that moves laterally along the rotating tube, the placement rack being used to place tubular materials, and the inner wall of the rotating tube is provided with multiple connecting plates connected to the rotating tube.

[0007] Furthermore, the placement rack has a cavity, and a positioning rod for positioning the tubular material is provided in the cavity. The positioning rod is inserted along one end of the placement rack, and an annular support frame for supporting the tubular material is fitted on the positioning rod. The end of the annular support frame is provided with a contact plate that contacts the surface of the tubular material. The feed end of the cleaning tank is provided with a sealing cover for sealing the cleaning tank. The sealing cover is provided with a movable plate that moves into the cleaning tank. The movable plate is provided with a cross locking rod that is inserted into the placement rack and limits and locks the positioning rod.

[0008] Furthermore, the placement rack slides along the inner wall groove of the rotating tube, the rotating tube has multiple through grooves arranged circumferentially, the connecting plates are arranged sequentially at intervals along the inner wall of the rotating tube, the inner wall of the cleaning tank has multiple cylindrical rollers arranged at intervals for supporting the rotating tube, the outside of the cleaning tank is provided with a rotating tube drive motor for driving the rotating tube to rotate, the bottom of the cleaning tank is provided with a base for supporting the cleaning tank, the base has a V-shaped collection chamber for collecting cleaning liquid, the outside of the base is provided with a water outlet pipe connected to the V-shaped collection chamber, and the outside of the sealing cover is provided with a moving plate drive bolt for driving the moving plate to move.

[0009] Furthermore, the inlet of the cleaning tank is connected to the outlet of one of the cleaning tanks, and an exhaust aftertreatment device is installed between the two cleaning tanks. A switch butterfly valve is installed at the inlet of the cleaning tank, and an exhaust condenser is installed between the switch butterfly valve and the exhaust aftertreatment device. The upper end of the exhaust condenser is connected to a first pipeline, which is connected to a cooling water inlet pipe. The lower end of the exhaust condenser is connected to a second pipeline, which is connected to a cooling water return pipe. A V9 switch valve is installed between the first pipeline and the cooling water inlet pipe. The bottom end of the exhaust condenser is connected to the tank area for DMAC waste solution.

[0010] Furthermore, the inlet of the cleaning tank is connected to the outlet of another cleaning tank, a V1-4 switch valve is provided between the cleaning tank and the other cleaning tank, a V1-2 feed valve is provided in the injection pipe, a deionized water pipe is provided outside the cleaning tank and connected to the cleaning tank, a V1-1 switch valve is provided between the deionized water pipe and the cleaning tank, an S3 pipeline is provided outside the cleaning tank and connected to the cleaning tank, and a V1-3 steam valve is provided between the S3 pipeline and the cleaning tank.

[0011] Furthermore, the outlet pipe is equipped with a drain valve, and the outside of the cleaning tank is equipped with a pipeline connected to the cleaning tank, which is connected to the wastewater pipeline. The pipeline connected to the cleaning tank is connected to the DMAC waste solution to the tank area, and a DMAC circulation discharge pump is provided between the pipeline connected to the cleaning tank and the DMAC waste solution to the tank area.

[0012] Furthermore, a V1-8 switch valve and a V1-7 discharge valve are installed in the pipeline between the wastewater pipeline and the DMAC circulating discharge pump. A V1-10 switch valve is installed in the pipeline between the DMAC circulating discharge pump and the DMAC waste solution to the tank area. A V1-6 discharge valve for controlling the cleaning tank is installed in the pipeline between the DMAC circulating discharge pump and the V1-10 switch valve. A V1-5 circulation valve is installed in the pipeline between the V1-7 discharge valve and the DMAC circulating discharge pump that connects to the cleaning tank. A UT device is installed in the pipeline outside the cleaning tank that connects to the V1-8 switch valve and the V1-7 discharge valve.

[0013] Furthermore, the feed end of the cleaning tank is equipped with a ventilation hood, a monorail crane for conveying tubular materials is provided above the cleaning tank, and a control panel is provided inside the cleaning tank.

[0014] A method for operating a clean and efficient cleaning device for spandex production, the method comprising:

[0015] Step 1: Open the suction hood, use a monorail to hoist the tubular material into the cleaning tank, close the lid and lock it; open all valves that need to be operated.

[0016] Step 2: Start the cleaning program

[0017] 2.1 On the system's initial page, select the cleaning tank to be operated. Once selected, except for the V9 switch valve, all valve operation commands will only be given to the valves on this tank.

[0018] 2.2. Choose between the DMAC cleaning step and the water rinsing step;

[0019] 2.3 Setting up the DMAC cleaning parameter table:

[0020] A) Select the number of times DMAC cleaning is repeated (1-4). You can set it to the last set value or manually enter the number of times to modify.

[0021] B) Set the duration of each cleaning cycle (countdown timers A, B, C). The default value is the last setting, but you can also manually enter and modify it.

[0022] C) Set the cleaning temperature for each cycle (30-130°C). The default value is the last setting, but you can also manually enter and modify it.

[0023] 2.4 DMAC cleaning program module A, started manually by clicking or pressing a button, will sequentially close all valves: V1-1 switch valve, V1-2 feed valve, V1-3 steam valve, V1-7 discharge valve, V1-8 switch valve, V1-5 circulation valve, V1-6 discharge valve, and V1-4 switch valve.

[0024] A1. Confirm that the bottom DMAC waste solution discharge valve V1-7 and the wastewater discharge valve V1-8 are in the closed position;

[0025] A2. Open the exhaust condenser cooling water supply valve V9 switch valve and the vent valve V1-4 switch valve. After feedback that it is open for 5 seconds, open the DMAC V1-2 feed valve.

[0026] A3. Inject DMAC to the high level H1 (provided by LIT). The high level alarm H1 will trigger and close the DMAC feed valve V1-2.

[0027] A4. Open the steam supply valve V1-3, heat to the set temperature T1 (100℃), then close the V1-4 switch valve. After 1 minute, close the exhaust condenser cooling water supply valve V9. After heating to the cleaning temperature T0 (120℃), close the steam regulating valve V1-3 and start the countdown timer A.

[0028] A5. Open the V1-6 discharge valve, start the circulation pump, and then immediately open the V1-5 circulation valve.

[0029] A6. When the countdown timer expires, close the V1-6 discharge valve, then stop the circulation pump, and then close the V1-5 circulation valve.

[0030] A7. Call the DMAC emission program B; if the number of repeat cleaning cycles has been reached, the program ends.

[0031] A8. If the required number of cleaning cycles has not been reached, repeat steps A1-A7 above.

[0032] The program will terminate when the option is clicked. This will return the system to its initial state, and the following valves will close in sequence: V1-1 switch valve, V1-2 feed valve, V1-3 steam valve, V1-7 discharge valve, V1-8 switch valve, V1-5 circulation valve, V1-6 discharge valve, and V1-4 switch valve, stopping the circulation pump.

[0033] When the DMAC cleaning program is running, the water valve V1-1 and wastewater discharge valve V1-8 of the cleaning tank remain closed and locked, and cannot be operated; manual control of the valves can only be performed when the program is not running.

[0034] 2.4, Cleaning Tank DMAC Discharge Procedure Module B

[0035] B1. Open the exhaust condenser cooling water supply valve V9 and the vent valve V1-4. After 5 seconds of feedback, open the DMAC waste solution bottom discharge valve V1-7, start the discharge pump, and then open the discharge valve V1-10.

[0036] B2. Low liquid level alarm L1 is triggered. After 3 seconds, the discharge pump stops and sequentially closes the DMAC waste solution discharge valve V1-10, the bottom discharge valve V1-7, and the vent valve V1-4. After a 1-minute delay, the exhaust condenser cooling water supply valve V9 is closed, and the program ends.

[0037] The third step, water washing program module C, is started manually by clicking or pressing a button, and a stop button is set to close all inlet and outlet valves and pumps.

[0038] 3.1 On the system's initial page, select the cleaning tank to be operated. Once selected, except for the V9 switch valve, all valve operation commands will only be given to the valves on this tank.

[0039] 3.2. Choose between the DMAC cleaning step and the water rinsing step;

[0040] 3.3 Setting the water washing parameter table:

[0041] A) Select the number of times to repeat the water wash (1-3). The default value is the last setting, but you can also manually enter and modify the number of times.

[0042] B) Set the duration of each cleaning cycle (countdown timer T1, T2, T3). The default value is the previous setting, but you can also manually enter and modify it.

[0043] C1. After the operator confirms, click Start;

[0044] C2. Close the following valves: bottom DMAC waste solution V1-6 discharge valve, wastewater V1-7 discharge valve, DMACV1-2 feed valve, V1-5 circulation valve, V1-3 steam valve;

[0045] C3. Open the wastewater discharge V1-8 switch valve. After feedback that it is open for 3 seconds, open the drain valve. Open the deionized water pipeline inlet valve and inject water into the deionized water pipeline until the liquid level is high H1 (from the liquid level transmitter). Then, close the deionized water pipeline inlet valve, drain valve and wastewater discharge V1-8 switch valve in sequence.

[0046] C4. Start the countdown timer C;

[0047] C5. Countdown timer expires, invoke sewage discharge program D;

[0048] C6. If the number of repetitions has not been reached, after step D, repeat steps C1-C5; if the number of repetitions has been reached, end the program.

[0049] The program is terminated. Clicking this option will return the program to its initial state, and the following valves will be closed in sequence: V1-1 switch valve, V1-2 feed valve, V1-3 steam valve, V1-7 discharge valve, V1-8 switch valve, V1-5 circulation valve, V1-6 discharge valve, and V1-4 switch valve.

[0050] When the washing program is running, all DMAC valves of the washing tank remain closed and locked and cannot be operated. Manual valve control commands can only be executed when the program is not running.

[0051] 3.2 Wastewater Discharge Procedure Module D for Cleaning Tanks

[0052] D1. Open the exhaust condenser cooling water supply switch valve V9 and the vent switch valve V1-4. After 5 seconds of feedback that the valve is open, open the wastewater discharge switch valve V1-8.

[0053] D2. Low liquid level alarm L1 is triggered. After 5 seconds, wastewater discharge valves V1-8 are closed sequentially, followed by venting valve V1-4. After a 1-minute delay, exhaust condenser cooling water supply valve V9 is closed, and the program ends.

[0054] Step 4: Operation logic of the V9 on / off valve's exhaust condenser cooling water supply valve:

[0055] The opening command uses OR logic, and the equipment remains open when any tank issues an opening command;

[0056] The shutdown command uses AND logic; the equipment will only shut down when all cleaning tank operation commands are closed.

[0057] Step 5: Circulation Pump Operation Logic

[0058] The pump must be in automatic mode; if in manual mode, the pump can only be started and stopped manually and is not automatically controlled by the program.

[0059] Either the V1-5 circulation valve or the V1-7 discharge valve must be in the open position;

[0060] When both the V1-5 circulation valve and the V1-7 discharge valve are closed, the circulation pump will stop after 3 seconds.

[0061] An emergency stop button is provided for the circulating pump. Pressing it will stop the pump motor. Manual reset is required to resume operation.

[0062] Step 6: Interlocking

[0063] I0, tank level high H1 (from level transmitter LT), close V1-1 switch valve, V1-2 feed valve;

[0064] I1. When the tank level is high (H2, from the level transmitter LT) or HH (from the level switch LS), close the V1-1 switch valve, V1-2 feed valve, V1-3 steam valve, V1-5 circulation valve, V1-6 discharge valve, and V1-8 switch valve, and start the DMAC waste solution discharge procedure B.

[0065] I2, Tank level is low L1 (from level transmitter LT), shut off the drain pump, and shut off the V1-7 drain valve and V1-8 switch valve;

[0066] I3, Temperature is high (HH), close the steam supply valve, open the V9 switch valve and the V1-4 switch valve;

[0067] Step 7, Other

[0068] The control system's initial interface is the interface for selecting the cleaning tank.

[0069] The program logic is configured such that when the DMAC cleaning program is called, the water washing and drainage modules are disabled, and the water valve cannot be opened.

[0070] The DMAC cleaning and drainage module interface and the water washing and drainage module are set on two separate operation interfaces. You need to switch between the interfaces to click to run, which prevents accidental operation.

[0071] Set up audible and visual alarms for high liquid levels and high temperatures to remind operators to verify and inspect the site and deal with any problems promptly.

[0072] This invention, while adhering to the basic cleaning process, adds inlet and outlet water pipelines to the cleaning tank and installs switching valves on all inlet and outlet pipelines. A PLC program controls the opening and closing sequence of these valves, achieving fully automated operation of all cleaning steps except for workpiece placement and removal. Furthermore, without opening the tank or removing the workpiece, a water rinsing step is introduced within the same cleaning tank following DMAC solvent cleaning. Utilizing the infinite miscibility of DMAC with water, residual DMAC in the workpiece is effectively removed by water rinsing, simultaneously cooling the workpiece. This prevents DMAC from evaporating into the workshop environment and polluting the air when the tank is opened. The wastewater containing DMAC after cleaning is sent to a purification system for recovery if the concentration is high, and directly to a wastewater treatment plant if the concentration is low, depending on the concentration.

[0073] The features of this invention are as follows: 1. A water washing step is embedded in the same tank, eliminating the need to remove the workpiece for re-washing after the solvent cleaning step, thus avoiding the problem of DMAC volatilization and air pollution caused by workpiece removal; 2. The cleaning process is automated through PLC program control, and the program and interlocks prevent potential production or environmental accidents caused by performing solvent cleaning and water washing in the same tank; 3. The automated operation of the cleaning step reduces the workload of the operator; 4. By using a high-flow circulation pump and a unique design of the pump inlet and outlet pipelines, the effect of circulation rinsing is improved, which can reduce the time required for workpiece cleaning and further improve operational efficiency.

[0074] The control panel allows for the setup of automatic operation modules for solvent cleaning, solvent discharge, water washing, and wastewater discharge. Preset operating conditions are available, and operators can manually change these conditions before starting if needed. After the workpiece is hoisted and capped, the operator selects the corresponding cleaning tank on the PLC touchscreen interface to initiate the program. The PLC sequentially controls the on / off operation of each automatic valve (feed, circulation, discharge, and exhaust valve) and the circulation (discharge) pump, ensuring coordinated operation and completing the cleaning process. Interlocking of valves and pumps ensures safety and prevents production or environmental accidents.

[0075] This invention relates to a clean and efficient cleaning device and operating method for spandex production, which, compared with existing technologies,

[0076] 1. It completely eliminates the environmental pollution caused by the large amount of DMAC volatilization generated when the workpiece is lifted out after cleaning during the component cleaning process, and reduces the subsequent collection and disposal costs caused by air pollution.

[0077] 2. The PLC enables the programming and automation of the cleaning process, reducing the workload of operators and improving the consistency of cleaning results.

[0078] 3. It eliminates the potential production or environmental accidents caused by using the same tank for solvent and water washing.

[0079] 4. A high-flow-rate circulating pump and a specially designed inlet / outlet position are adopted, which allows the cleaning liquid to exert a strong scouring effect on the workpiece during the cleaning process, further enhancing the cleaning effect and improving the cleaning operation efficiency. Attached Figure Description

[0080] Figure 1 This is a schematic diagram of the present invention;

[0081] Figure 2 This is a schematic diagram of the cleaning tank of the present invention;

[0082] Figure 3 For the present invention Figure 2 A partial cross-sectional structural diagram;

[0083] Figure 4 For the present invention Figure 2 Partial structural diagram;

[0084] Figure 5 For the present invention Figure 3 Another part of the structural diagram.

[0085] In the diagram: 1. Cleaning tank; 4. Moving plate drive bolt; 5. Monorail crane; 6. Injection pipe; 7. Rotating pipe; 8. Placement rack; 9. Tubular material; 10. Connecting plate; 11. Cavity; 12. Positioning rod; 13. Sealing cover; 14. Moving plate; 15. Cross locking rod; 16. Through groove; 17. Cylindrical roller; 18. Annular support frame; 19. Contact plate; 20. Rotating pipe drive motor; 21. Base; 22. V-shaped collection chamber; 23. Water outlet pipe; 24. Exhaust aftertreatment device; 25. Switch butterfly valve; 26. Exhaust condensate. 27. First pipeline; 28. Second pipeline; 29. ​​DMAC waste solution to tank area; 30. V9 switch valve; 31. V1-4 switch valve; 32. V1-2 feed valve; 33. V1-1 switch valve; 34. V1-3 steam valve; 35. Steam trap; 37. DMAC circulating discharge pump; 38. V1-8 switch valve; 39. V1-7 discharge valve; 40. V1-10 switch valve; 41. V1-6 discharge valve; 42. V1-5 circulation valve; 43. UT device; 44. Control panel; 45. Suction hood. Detailed Implementation

[0086] 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. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0087] Please see Figures 1 to 5This invention provides a technical solution: a clean and efficient cleaning device for spandex production, comprising a cleaning tank 1, an air intake hood 45 for ventilation at the feed end of the cleaning tank 1, a monorail crane 5 for conveying tubular materials above the cleaning tank 1, a control panel 44 inside the cleaning tank 1, the water inlet of the cleaning tank 1 connected to the water outlet of one of the cleaning tank 1, an exhaust after-treatment device 24 installed between the two cleaning tanks 1, a switch butterfly valve 25 at the water inlet of the cleaning tank 1, an exhaust condenser 26 between the switch butterfly valve 25 and the exhaust after-treatment device 24, a first pipeline 27 connected to the upper end of the exhaust condenser 26, the first pipeline 27 connected to the cooling water inlet pipe, and a second pipeline 28 connected to the lower end of the exhaust condenser 26. 8 is connected to the cooling water return pipe. A V9 switch valve 30 is installed between the first pipeline 27 and the cooling water inlet pipe. The bottom end of the exhaust condenser 26 is connected to the tank area 29 with DMAC waste solution. The water inlet of cleaning tank 1 is connected to the water outlet of another cleaning tank 1. A V1-4 switch valve 31 is installed between cleaning tank 1 and another cleaning tank 1. A V1-2 feed valve 32 is installed in the injection pipe 6. A deionized water pipeline connected to cleaning tank 1 is installed outside cleaning tank 1. A V1-1 switch valve 33 is installed between the deionized water pipeline and cleaning tank 1. An S3 pipeline connected to cleaning tank 1 is installed outside cleaning tank 1. A V1-3 steam valve 34 is installed between the S3 pipeline and cleaning tank 1. An injection port for injecting DMAC solvent is installed at the water inlet of cleaning tank 1. The cleaning tank 1 has a rotating tube 7 inside, which rotates. Inside the rotating tube 7 is a placement rack 8 that moves laterally along the rotating tube 7. The placement rack 8 has a cavity 11, and a positioning rod 12 for positioning the tubular material 9 is located within the cavity 11. The positioning rod 12 is inserted into one end of the placement rack 8. An annular support frame 18 for supporting the tubular material 9 is loosely fitted onto the positioning rod 12. The end of the annular support frame 18 has a contact plate 19 that contacts the surface of the tubular material 9. The inlet end of the cleaning tank 1 has a sealing cover 13 for sealing the cleaning tank 1. The sealing cover 13 has a movable plate 14 that moves into the cleaning tank 1. The movable plate 14 has a cross-shaped locking rod that is inserted into the placement rack 8 and locks the positioning rod 12. 15. The placement rack 8 slides along the inner wall groove of the rotating tube 7. Multiple through grooves 16 are circumferentially arranged in the rotating tube 7. Connecting plates 10 are sequentially spaced along the inner wall of the rotating tube 7. Multiple cylindrical rollers 17 for supporting the rotating tube 7 are circumferentially spaced on the inner wall of the cleaning tank 1. A rotating tube drive motor 20 for driving the rotating tube 7 to rotate is provided outside the cleaning tank 1. A base 21 for supporting the cleaning tank 1 is provided below the cleaning tank 1. A V-shaped collection chamber 22 for collecting cleaning fluid is provided in the base 21. A water outlet pipe 23 connected to the V-shaped collection chamber 22 is provided outside the base 21. A moving plate drive bolt 4 for driving the moving plate 14 to move is provided outside the sealing cover 13. A drain valve 35 is provided in the water outlet pipe 23.The external structure of cleaning tank 1 is connected to a wastewater pipeline via a connecting pipe. This connecting pipe also connects to the DMAC waste solution in tank area 29. A DMAC circulation discharge pump 37 is installed between the connecting pipe and the DMAC waste solution in tank area 29. A V1-8 on / off valve 38 and a V1-7 discharge valve 39 are installed in the pipeline between the wastewater pipeline and the DMAC circulation discharge pump 37. A V1-10 switch valve is installed in the pipeline between the DMAC circulation discharge pump 37 and the DMAC waste solution in tank area 29. A V1-6 discharge valve 41, controlling the cleaning tank 1, is installed in the pipeline between valve 40, DMAC circulating discharge pump 37, and V1-10 switching valve 40. A V1-5 circulating valve 42 is installed in the pipeline connecting the cleaning tank 1 to the V1-7 discharge valve and DMAC circulating discharge pump 37. A UT device 43 is installed in the pipeline connecting the cleaning tank 1 to the V1-8 switching valve and V1-7 discharge valve. A placement rack 8 is used to place tubular materials 9. Multiple connecting plates 10 connected to the rotating pipe 7 are provided on the inner wall of the rotating pipe 7.

[0088] Please see Figures 1 to 5 This invention provides a technical solution: an operating method for a clean and efficient cleaning device for spandex production, the method comprising:

[0089] Step 1: Open the suction hood 45, and use the monorail crane 5 to hoist the tubular material 9 into the cleaning tank 1. Close the lid and lock it. Open all valves that need to be operated.

[0090] Step 2: Start the cleaning program

[0091] 2.1 On the system's initial page, select the cleaning tank to be operated. Once selected, except for the V9 switch valve, all valve operation commands will only be given to the valves on this tank.

[0092] 2.2. Choose between the DMAC cleaning step and the water rinsing step;

[0093] 2.3 Setting up the DMAC cleaning parameter table:

[0094] A) Select the number of times DMAC cleaning will repeat. You can set the previous setting or manually enter the number of times to modify.

[0095] B) Set the duration of each cleaning cycle. The default value is the last setting, but you can also manually enter and modify it.

[0096] C) Set the temperature for each cleaning cycle. The default value is the previous setting, but you can also manually enter and modify it.

[0097] 2.4 DMAC cleaning program module A, started manually by clicking or pressing a button, will sequentially close all valves: V1-1 switch valve, V1-2 feed valve, V1-3 steam valve, V1-7 discharge valve, V1-8 switch valve, V1-5 circulation valve, V1-6 discharge valve, and V1-4 switch valve.

[0098] A1. Confirm that the bottom DMAC waste solution discharge valve V1-7 and the wastewater discharge valve V1-8 are in the closed position;

[0099] A2. Open the exhaust condenser cooling water supply valve V9 switch valve and the vent valve V1-4 switch valve. After feedback that it is open for 5 seconds, open the DMAC V1-2 feed valve.

[0100] A3. Inject DMAC to the high liquid level H1 height. The high liquid level alarm H1 is triggered to close the DMAC feed valve V1-2.

[0101] A4. Open the steam supply valve V1-3, heat to the set temperature T1, then close the V1-4 switch valve. After 1 minute, close the exhaust condenser cooling water supply valve V9 switch valve. After heating to the cleaning temperature T0, close the steam regulating valve V1-3 and start the countdown timer A.

[0102] A5. Open the V1-6 discharge valve, start the circulation pump, and then immediately open the V1-5 circulation valve.

[0103] A6. When the countdown timer expires, close the V1-6 discharge valve, then stop the circulation pump, and then close the V1-5 circulation valve.

[0104] A7. Call the DMAC emission program B; if the number of repeat cleaning cycles has been reached, the program ends.

[0105] A8. If the required number of cleaning cycles has not been reached, repeat steps A1-A7 above.

[0106] The program will terminate when the option is clicked. This will return the system to its initial state, and the following valves will close in sequence: V1-1 switch valve, V1-2 feed valve, V1-3 steam valve, V1-7 discharge valve, V1-8 switch valve, V1-5 circulation valve, V1-6 discharge valve, and V1-4 switch valve, stopping the circulation pump.

[0107] When the DMAC cleaning program is running, the water valve V1-1 and wastewater discharge valve V1-8 of the cleaning tank remain closed and locked, and cannot be operated; manual control of the valves can only be performed when the program is not running.

[0108] 2.4, Cleaning Tank DMAC Discharge Procedure Module B

[0109] B1. Open the exhaust condenser cooling water supply switch valve V9 and the vent switch valve V1-4. After 5 seconds of feedback, open the bottom discharge valve V1-7 for DMAC waste solution, start the discharge pump, and then open the discharge switch valve V1-10.

[0110] B2. Low liquid level alarm L1 is triggered. After 3 seconds, the discharge pump stops and sequentially closes the DMAC waste solution discharge valve V1-10, the bottom discharge valve V1-7, and the vent valve V1-4. After a 1-minute delay, the exhaust condenser cooling water supply valve V9 is closed, and the program ends.

[0111] The third step, water washing program module C, is started manually by clicking or pressing a button, and a stop button is set to close all inlet and outlet valves and pumps.

[0112] 3.1 On the system's initial page, select the cleaning tank to be operated. Once selected, except for the V9 switch valve, all valve operation commands will only be given to the valves on this tank.

[0113] 3.2. Choosing between DMAC cleaning steps and water rinsing steps

[0114] 3.3 Setting the water washing parameter table:

[0115] A) Select the number of times the water wash will repeat. The default value is the last setting, but you can also manually enter and modify the number of times.

[0116] B) Set the duration of each cleaning cycle. The default value is the last setting, but you can also manually enter and modify it.

[0117] C1. After the operator confirms, click Start;

[0118] C2. Close the following valves: bottom DMAC waste solution V1-6 discharge valve, wastewater V1-7 discharge valve, DMACV1-2 feed valve, V1-5 circulation valve, V1-3 steam valve;

[0119] C3. Open the wastewater discharge V1-8 switch valve. After feedback that it is open for 3 seconds, open the drain valve. Open the deionized water pipeline inlet valve and inject deionized water into the deionized water pipeline until the liquid level is high H1. Then, close the deionized water pipeline inlet valve, drain valve and wastewater discharge V1-8 switch valve in sequence.

[0120] C4. Start the countdown timer C;

[0121] C5. Countdown timer expires, invoke sewage discharge program D;

[0122] C6. If the number of repetitions has not been reached, after step D, repeat steps C1-C5; if the number of repetitions has been reached, end the program.

[0123] The program is terminated. Clicking this option will return the program to its initial state, and the following valves will be closed in sequence: V1-1 switch valve, V1-2 feed valve, V1-3 steam valve, V1-7 discharge valve, V1-8 switch valve, V1-5 circulation valve, V1-6 discharge valve, and V1-4 switch valve.

[0124] When the washing program is running, all DMAC valves of the washing tank remain closed and locked and cannot be operated. Manual valve control commands can only be executed when the program is not running.

[0125] 3.2 Wastewater Discharge Procedure Module D for Cleaning Tanks

[0126] D1. Open the exhaust condenser cooling water supply switch valve V9 and the vent switch valve V1-4. After 5 seconds of feedback that the valve is open, open the wastewater discharge switch valve V1-8.

[0127] D2. Low liquid level alarm L1 is triggered. After 5 seconds, wastewater discharge valves V1-8 are closed sequentially, followed by venting valve V1-4. After a 1-minute delay, exhaust condenser cooling water supply valve V9 is closed, and the program ends.

[0128] Step 4: Operation logic of the V9 on / off valve's exhaust condenser cooling water supply valve:

[0129] The opening command uses OR logic, and the equipment remains open when any tank issues an opening command;

[0130] The shutdown command uses AND logic; the equipment will only shut down when all cleaning tank operation commands are closed.

[0131] Step 5: Circulation Pump Operation Logic

[0132] The pump must be in automatic mode; if in manual mode, the pump can only be started and stopped manually and is not automatically controlled by the program.

[0133] Either the V1-5 circulation valve or the V1-7 discharge valve must be in the open position;

[0134] When both the V1-5 circulation valve and the V1-7 discharge valve are closed, the circulation pump will stop after 3 seconds.

[0135] An emergency stop button is provided for the circulating pump. Pressing it will stop the pump motor. Manual reset is required to resume operation.

[0136] Step 6: Interlocking

[0137] I0, tank liquid level is high H1, close V1-1 switch valve and V1-2 feed valve;

[0138] I1. If the tank level is high (H2 or HH), close the V1-1 switch valve, V1-2 feed valve, V1-3 steam valve, V1-5 circulation valve, V1-6 discharge valve, and V1-8 switch valve, and start the DMAC waste solution discharge procedure B.

[0139] I2, if the tank level is low (L1), turn off the drain pump and close the V1-7 drain valve and the V1-8 switch valve.

[0140] I3. When the temperature is high (HH), close the steam supply valve and open the V9 and V1-4 switching valves.

[0141] Step 7, Other

[0142] The control system's initial interface is the interface for selecting the cleaning tank.

[0143] The program logic is configured such that when the DMAC cleaning program is called, the water washing and drainage modules are disabled, and the water valve cannot be opened.

[0144] The DMAC cleaning and drainage module interface and the water washing and drainage module are set on two separate operation interfaces. You need to switch between the interfaces to click to run, which prevents accidental operation.

[0145] Set up audible and visual alarms for high liquid levels and high temperatures to remind operators to verify and inspect the site and deal with any problems promptly.

[0146] All electrical components mentioned in this article are connected to an external main controller and 380V commercial power supply, and the main controller can be a conventional known device such as a computer that can control it.

[0147] In the description of this specification, the terms "connection", "installation", "fixing", "setting", etc. are interpreted broadly. For example, "connection" can be a fixed connection or an indirect connection through an intermediate component without affecting the relationship between components and the technical effect. It can also be an integral connection or a partial connection. In such cases, those skilled in the art can understand the specific meaning of the above terms in this invention or invention according to the specific circumstances.

[0148] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cleaning device for cleaning spandex production efficiently, comprising a cleaning tank (1), characterized in that: The inlet end of the cleaning tank (1) is provided with an injection pipe (6) for injecting DMAC solvent. The inside of the cleaning tank (1) is provided with a rotating tube (7) that rotates. The inside of the rotating tube (7) is provided with a placement rack (8) that moves laterally along the rotating tube (7). The placement rack (8) is used to place tubular materials (9). The inner wall of the rotating tube (7) is provided with multiple connecting plates (10) connected to the rotating tube (7). The placement rack (8) has a cavity (11), and the cavity (11) has a positioning rod (12) for positioning the tubular material (9). The positioning rod (12) is inserted along one end of the placement rack (8). The positioning rod (12) is fitted with an annular support frame (18) for supporting the tubular material (9). The end of the annular support frame (18) has a contact plate (19) that contacts the surface of the tubular material (9). The feed end of the cleaning tank (1) has a sealing cover (13) for sealing the cleaning tank (1). The sealing cover (13) has a moving plate (14) that moves into the cleaning tank (1). The moving plate (14) has a cross locking rod (15) that is inserted into the placement rack (8) and limits and locks the positioning rod (12). The placement rack (8) slides along the inner wall groove of the rotating tube (7). The rotating tube (7) has multiple through grooves (16) arranged circumferentially. The connecting plate (10) is arranged sequentially at intervals along the inner wall of the rotating tube (7). The inner wall of the cleaning tank (1) has multiple cylindrical rollers (17) arranged circumferentially at intervals to support the rotating tube (7). The outside of the cleaning tank (1) is provided with a rotating tube drive motor (20) for driving the rotating tube (7) to rotate. The bottom of the cleaning tank (1) is provided with a base (21) for supporting the cleaning tank (1). The base (21) is provided with a V-shaped collection chamber (22) for collecting cleaning liquid. The outside of the base (21) is provided with a water outlet pipe (23) connected to the V-shaped collection chamber (22). The outside of the sealing cover (13) is provided with a moving plate drive bolt (4) for driving the moving plate (14) to move.

2. The cleaning device for spandex production according to claim 1, characterized in that: The inlet of the cleaning tank (1) is connected to the outlet of one of the cleaning tanks (1). An exhaust aftertreatment device (24) is installed between the two cleaning tanks (1). A switch butterfly valve (25) is provided at the inlet of the cleaning tank (1). An exhaust condenser (26) is provided between the switch butterfly valve (25) and the exhaust aftertreatment device (24). A first pipeline (27) is connected to the upper end of the exhaust condenser (26). The first pipeline (27) is connected to the cooling water inlet pipe. A second pipeline (28) is connected to the lower end of the exhaust condenser (26). The second pipeline (28) is connected to the cooling water return pipe. A V9 switch valve (30) is provided between the first pipeline (27) and the cooling water inlet pipe. A DMAC waste solution is provided to the tank area (29) at the bottom of the exhaust condenser (26).

3. The cleaning device for spandex production according to claim 1, characterized in that: The inlet of the cleaning tank (1) is connected to the outlet of another cleaning tank (1). A V1-4 switch valve (31) is provided between the cleaning tank (1) and the other cleaning tank (1). A V1-2 feed valve (32) is provided in the injection pipe (6). A deionized water pipe connected to the cleaning tank (1) is provided outside the cleaning tank (1). A V1-1 switch valve (33) is provided between the deionized water pipe and the cleaning tank (1). An S3 pipe connected to the cleaning tank (1) is provided outside the cleaning tank (1). A V1-3 steam valve (34) is provided between the S3 pipe and the cleaning tank (1).

4. The cleaning and efficient washing device for spandex production according to claim 1, characterized in that: The outlet pipe (23) is equipped with a drain valve (35). The outside of the cleaning tank (1) is equipped with a pipe connected to the cleaning tank (1) and a wastewater pipe. The pipe connected to the cleaning tank (1) is connected to the DMAC waste solution to the tank area (29). A DMAC circulation discharge pump (37) is provided between the pipe connected to the cleaning tank (1) and the DMAC waste solution to the tank area (29).

5. The cleaning device for spandex production according to claim 4, characterized in that: A V1-8 switch valve (38) and a V1-7 discharge valve (39) are provided in the pipeline between the wastewater pipeline and the DMAC circulating discharge pump (37). A V1-10 switch valve (40) is provided in the pipeline between the DMAC circulating discharge pump (37) and the DMAC waste solution to the tank area (29). A V1-6 discharge valve (41) for controlling the cleaning tank (1) is provided in the pipeline between the DMAC circulating discharge pump (37) and the V1-10 switch valve (40). A V1-5 circulating valve (42) is provided in the pipeline between the V1-7 discharge valve and the DMAC circulating discharge pump (37) connected to the cleaning tank (1).

6. The cleaning device for spandex production according to claim 5, characterized in that: The feed end of the cleaning tank (1) is provided with a ventilation hood (45), and a monorail crane (5) for conveying tubular materials is provided above the cleaning tank (1). The cleaning tank (1) is provided with a control panel (44).

7. The operating method of the cleaning device for spandex production according to claim 1, characterized in that: The method includes: Step 1: Open the suction hood (45), and use the monorail crane (5) to lift the tubular material (9) into the cleaning tank (1), close the cover and lock it; open all the valves that need to be operated. Step 2: Start the cleaning program; 2.1 On the system's initial page, select the cleaning tank to be operated. Once selected, except for the V9 switch valve, all valve operation commands will only be given to the valves on this tank. 2.

2. Choose between the DMAC cleaning step and the water rinsing step; 2.3 Setting up the DMAC cleaning parameter table: A) Select the number of times DMAC cleaning will repeat. You can set the previous setting or manually enter the number of times to modify. B) Set the duration of each cleaning cycle. The default value is the last setting, but you can also manually enter and modify it. C) Set the cleaning temperature for each cleaning cycle. The default value is the previous setting, but you can also manually enter and modify it. 2.4 DMAC cleaning program module A, started manually by clicking or pressing a button, will sequentially close all valves: V1-1 switch valve, V1-2 feed valve, V1-3 steam valve, V1-7 discharge valve, V1-8 switch valve, V1-5 circulation valve, V1-6 discharge valve, and V1-4 switch valve. A1. Confirm that the bottom DMAC waste solution discharge valve V1-7 and the wastewater discharge valve V1-8 are in the closed position; A2. Open the exhaust condenser cooling water supply valve V9 switch valve and the vent valve V1-4 switch valve. After feedback that it is open for 5 seconds, open the DMAC V1-2 feed valve. A3. Inject DMAC to the high liquid level H1 height. The high liquid level alarm H1 is triggered to close the DMAC feed valve V1-2. A4. Open the steam supply valve V1-3, heat to the set temperature T1, then close the V1-4 switch valve. After 1 minute, close the exhaust condenser cooling water supply valve V9 switch valve. After heating to the cleaning temperature T0, close the steam regulating valve V1-3 and start the countdown timer A. A5. Open the V1-6 discharge valve, start the circulation pump, and then immediately open the V1-5 circulation valve. A6. When the countdown timer expires, close the V1-6 discharge valve, then stop the circulation pump, and then close the V1-5 circulation valve. A7. Call the DMAC emission program B; if the number of repeat cleaning cycles has been reached, the program ends. A8. If the required number of cleaning cycles has not been reached, repeat steps A1-A7 above. The program is terminated. Clicking this option will return the program to its initial state. The following valves will close in sequence: V1-1 switch valve, V1-2 feed valve, V1-3 steam valve, V1-7 discharge valve, V1-8 switch valve, V1-5 circulation valve, V1-6 discharge valve, and V1-4 switch valve, stopping the circulation pump. When the DMAC cleaning program is running, the water valve V1-1 and wastewater discharge valve V1-8 of the cleaning tank remain closed and locked, and cannot be operated; manual valve control commands can only be executed when the program is not running. 2.4, Cleaning Tank DMAC Discharge Procedure Module B B1. Open the exhaust condenser cooling water supply switch valve V9 and the vent switch valve V1-4. After 5 seconds of feedback, open the bottom discharge valve V1-7 for DMAC waste solution, start the discharge pump, and then open the discharge switch valve V1-10. B2. Low liquid level alarm L1 is triggered. After 3 seconds, the discharge pump stops and sequentially closes the DMAC waste solution discharge valve V1-10, the bottom discharge valve V1-7, and the vent valve V1-4. After a 1-minute delay, the exhaust condenser cooling water supply valve V9 is closed, and the program ends. The third step, water washing program module C, is started manually by clicking or pressing a button, and a stop button is set to close all inlet and outlet valves and pumps. 3.1 On the system's initial page, select the cleaning tank to be operated. Once selected, except for the V9 switch valve, all valve operation commands will only be given to the valves on this tank. 3.

2. Choose between the DMAC cleaning step and the water rinsing step; 3.3 Setting the water washing parameter table: A) Select the number of times the water wash will repeat. The default value is the last setting, but you can also manually enter and modify the number of times. B) Set the duration of each cleaning cycle. The default value is the last setting, but you can also manually enter and modify it. C1. After the operator confirms, click Start; C2. Close the following valves: bottom DMAC waste solution V1-6 discharge valve, wastewater V1-7 discharge valve, DMACV1-2 feed valve, V1-5 circulation valve, V1-3 steam valve; C3. Open the wastewater discharge V1-8 switch valve. After feedback that it is open for 3 seconds, open the drain valve. Open the deionized water pipeline inlet valve and inject deionized water into the deionized water pipeline until the liquid level is high H1. Then, close the deionized water pipeline inlet valve, drain valve and wastewater discharge V1-8 switch valve in sequence. C4. Start the countdown timer C; C5. Countdown timer expires, invoke sewage discharge program D; C6. If the number of repetitions has not been reached, after step D, repeat steps C1-C5; if the number of repetitions has been reached, end the program. The program is terminated. Clicking this option will return the program to its initial state, and the following valves will be closed in sequence: V1-1 switch valve, V1-2 feed valve, V1-3 steam valve, V1-7 discharge valve, V1-8 switch valve, V1-5 circulation valve, V1-6 discharge valve, and V1-4 switch valve. When the washing program is running, all DMAC valves of the washing tank remain closed and locked and cannot be operated. Manual valve control commands can only be executed when the program is not running. 3.2 Wastewater Discharge Procedure Module D for Cleaning Tanks; D1. Open the exhaust condenser cooling water supply switch valve V9 and the vent switch valve V1-4. After 5 seconds of feedback that the valve is open, open the wastewater discharge switch valve V1-8. D2. Low liquid level alarm L1 is triggered. After 5 seconds, the wastewater discharge valves V1-8 and the venting valve V1-4 are closed in sequence. After a 1-minute delay, the exhaust condenser cooling water supply valve V9 is closed, and the program ends. Step 4: Operation logic of the V9 on / off valve's exhaust condenser cooling water supply valve: The opening command uses OR logic, and the equipment remains open when any tank issues an opening command; The shutdown command uses AND logic; the equipment will only shut down when all cleaning tank operation commands are closed. Step 5: Circulation pump operation logic; The pump must be in automatic mode; if in manual mode, the pump can only be started and stopped manually and is not automatically controlled by the program. Either the V1-5 circulation valve or the V1-7 discharge valve must be in the open position; When both the V1-5 circulation valve and the V1-7 discharge valve are closed, the circulation pump will stop after 3 seconds. An emergency stop button is provided for the circulating pump. Pressing it will stop the pump motor. Manual reset is required to resume operation. Step 6: Interlocking; I0, tank liquid level is high H1, close V1-1 switch valve and V1-2 feed valve; I1. If the tank level is high (H2 or HH), close the V1-1 switch valve, V1-2 feed valve, V1-3 steam valve, V1-5 circulation valve, V1-6 discharge valve, and V1-8 switch valve, and start the DMAC waste solution discharge procedure B. I2, if the tank level is low (L1), turn off the drain pump and close the V1-7 drain valve and the V1-8 switch valve; I3, High temperature HH, close the steam supply valve, open V9 switch valve and V1-4 switch valve; Step 7, Other: The control system's initial interface is the interface for selecting the cleaning tank; The program logic is set so that when the DMAC cleaning program is called, the water washing and drainage modules are disabled and the water valve cannot be opened. The DMAC cleaning and drainage module interface and the water washing and drainage module are set on two separate operation interfaces. You need to switch between the interfaces before you can click to run to prevent accidental operation. Set up audible and visual alarms for high liquid levels and high temperatures to remind operators to verify and inspect the site and deal with any problems promptly.

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