A multi-stage drawing and heat setting equipment and process for acrylic filament

Abstract

The application discloses a multi-stage stretching and heat setting acrylic filament preparation equipment and process, which comprises a multi-stage stretching structure, the multi-stage stretching structure is connected with a waste liquid treatment structure and is used for treating and recycling the waste liquid, a heat setting structure is installed on the upper side of the multi-stage stretching structure and is used for heat setting treatment of the acrylic filament, a heat energy recovery treatment assembly is connected with the heat setting structure and the waste liquid treatment structure and is used for recycling and reprocessing high-temperature heat energy, the multi-stage stretching structure comprises a bottom box, a first pretreatment assembly, a wet heat stretching assembly, a heat roller stretching assembly and an air cooling assembly are installed on the upper side of the bottom box, the wet heat stretching assembly is arranged on the right side of the first pretreatment assembly, the heat roller stretching assembly is arranged on the right side of the wet heat stretching assembly, and the air cooling assembly is arranged on the right side of the heat roller stretching assembly, the multi-stage stretching and heat setting acrylic filament preparation equipment and process are treated through multi-stage filtration, so that the waste water treatment effect is ensured, the treated waste water is stored in a liquid storage tank and is recycled finally.

Description

Technical Field

[0001] This invention relates to the field of acrylic filament processing technology, specifically to a multi-stage stretching and heat-setting acrylic filament preparation equipment and process. Background Technology

[0002] In the production of acrylic filament, multi-stage stretching processes are commonly used to improve fiber orientation and finished product performance. When multiple filaments are stretched in parallel by hot rollers, the filaments are limited only by ordinary guide structures. The individual filaments are prone to lateral displacement, mutual contact and entanglement, resulting in uneven contact area between the filaments and the hot rollers and inconsistent heating. The front-end spray washing process generates a large amount of wastewater containing fiber debris, suspended solids and trace amounts of additives. Conventional filtration systems have simple layers, and fine floating fibers easily clog the back-end filter cartridges, resulting in poor water circulation and purification effects. The heat setting box and electrically heated stretching hot rollers at the back of the equipment continuously generate a large amount of high-temperature hot air during operation. Most existing equipment directly discharges the waste heat and exhaust gas without recycling, resulting in high overall energy consumption and poor operating economy. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-stage stretching and heat-setting acrylic filament preparation equipment and process to solve the problems mentioned in the background art, such as uneven contact area between the filament and the hot roller, inconsistent heating, poor wastewater treatment effect, and most equipment directly discharging waste heat and exhaust gas without recycling, resulting in high overall energy consumption and poor operating economy.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a multi-stage stretching and heat-setting acrylic filament preparation equipment and process; the multi-stage stretching and heat-setting acrylic filament preparation equipment includes a multi-stage stretching structure, which is connected to a waste liquid treatment structure for treating and recycling the waste liquid; a heat-setting structure is installed on the upper side of the multi-stage stretching structure for heat-setting the acrylic filament; and a heat energy recovery and treatment component is connected to the heat-setting structure and the waste liquid treatment structure for recovering and reprocessing high-temperature heat energy.

[0005] The multi-stage stretching structure includes a base box, on the upper side of which are installed a first pretreatment component, a wet hot stretching component, a hot roller stretching component, and an air-cooling component. A wet hot stretching component is located to the right of the first pretreatment component, a hot roller stretching component is located to the right of the wet hot stretching component, an air-cooling component is located to the right of the hot roller stretching component, a first branching component is rotatably connected to the hot roller stretching component, and a second branching component is rotatably connected inside the air-cooling component.

[0006] The first pretreatment component includes a spray box, a first guide roller rotatably connected to the spray box, a cleaning nozzle installed on the upper side inside the spray box, the cleaning nozzle connected to a water supply pipe, the upper side of the water supply pipe connected to a first water inlet pipe, and the lower side of the spray box connected to a first drain pipe for wastewater discharge.

[0007] The wet thermal stretching assembly includes a water tank, a first electric heater embedded in the water tank, a second guide roller rotatably connected to the inner wall of the water tank, a second water inlet pipe connected to the rear side of the water tank, and a second drain pipe connected to the lower side of the water tank for wastewater discharge.

[0008] The hot roller stretching assembly includes a stretching box, on which an electrically heated guide roller body is rotatably connected and used for hot roller stretching.

[0009] The first line-separating assembly includes a long line guide roller, which is rotatably connected to the stretching box, and a line-separating roller is rotatably connected to the long line guide roller;

[0010] The air-cooled assembly includes an air-cooled box, and an air-cooled fan is installed on the upper side inside the air-cooled box;

[0011] A second branch line assembly is rotatably connected to the inner wall of the air-cooled box;

[0012] The heat-setting structure includes a connecting box, in which a first heat-setting component, a second heat-setting component, and a third heat-setting component are installed. The second heat-setting component is located to the right of the first heat-setting component, and the third heat-setting component is located to the right of the second heat-setting component.

[0013] The first heat setting assembly includes a heat setting box, a second electric heater embedded inside the heat setting box, and a wire roller rotatably connected inside the heat setting box;

[0014] The heat energy recovery and processing component includes an air inlet pipe, one end of which is connected to a heat setting box, and the other end of which is connected to a first air supply pipe. The first air supply pipe is connected to an air filter body, and one end of the air inlet pipe is connected to the air filter body, while the other end is connected to a heat conduction pipe. An air intake fan is installed inside the air inlet pipe.

[0015] Preferably, the waste liquid treatment structure includes a pre-filtration component, the lower side of which is connected to a cleaning component, and the lower side of the cleaning component is connected to a first wastewater treatment component. The multi-stage filtration process ensures the filtration effect. A second wastewater treatment component is provided on the right side of the first wastewater treatment component, the upper side of which is connected to a wet thermal stretching component, and the right side of the second wastewater treatment component is connected to a liquid storage component.

[0016] Preferably, the pre-filtration assembly includes a pre-filtration box, a filter screen is installed inside the pre-filtration box, a discharge port is opened on the filter screen, a water receiving hopper and a waste hopper are installed on the lower side of the pre-filtration box, and the water receiving hopper is located to the left of the waste hopper.

[0017] By adopting the above technical solution, impurities are filtered out by setting up a pre-filter component.

[0018] Preferably, the cleaning component includes a first power source, a rotating rod rotatably connected to the output end of the first power source, the rotating rod rotatably connected to the filter screen, a connecting rod installed on the rotating rod, a telescopic component installed on the connecting rod, and a scraper plate installed on the lower side of the telescopic component.

[0019] By adopting the above technical solution, impurities are cleaned by setting up cleaning components.

[0020] Preferably, the first wastewater treatment component includes a first horizontal solid-liquid separator, which is connected to a first bag filter via a first infusion pipe. One end of a second infusion pipe is connected to the first bag filter, and the other end of the second infusion pipe is connected to a first activated carbon filter. The lower side of the first activated carbon filter is connected to a first return pipe.

[0021] By adopting the above technical solution, the wastewater is treated in multiple stages by setting up a first wastewater treatment component.

[0022] Preferably, the second wastewater treatment component includes a second horizontal solid-liquid separator, which is connected to a precision membrane filter via a third infusion pipe, one end of a fourth infusion pipe is connected to the precision membrane filter, the other end of the third infusion pipe is connected to a second activated carbon filter, and the lower side of the second activated carbon filter is connected to a fifth infusion pipe.

[0023] By adopting the above technical solution, the wastewater generated by the wet hot stretching component is treated by setting up a second wastewater treatment component.

[0024] Preferably, the liquid storage assembly includes a liquid storage tank, and a heat-conducting pipe is embedded in the liquid storage tank.

[0025] By adopting the above technical solution, the treated circulating water is stored by setting up a liquid storage component.

[0026] Compared with the prior art, the beneficial effects of the present invention are: a multi-stage stretching and heat-setting acrylic filament preparation equipment and process,

[0027] (1) The present invention adopts an integrated continuous process route of spray washing, wet stretching, hot roller stretching, air cooling and drying, which effectively reduces the phenomenon of broken filaments and fuzzy filaments, improves the stability of fiber size and uniformity of mechanical properties, and ensures that each acrylic filament is heated evenly and stretches well by installing the first and second line-splitting components in the hot roller stretching and air cooling sections.

[0028] (2) The present invention ensures the wastewater treatment effect through multi-stage filtration, and finally stores it in the storage tank for recycling, thus avoiding waste of water resources;

[0029] (3) The present invention uses the high-temperature waste heat generated by the centralized electric heating guide roller body and the shaping box to heat the circulating water through the built-in spiral heat conduction pipe, and supplements the temperature with the first electric heater. The water temperature is flexibly controlled, the process parameters are stable throughout the process, and the heat energy is directly discharged, thus avoiding the waste of heat resources again. Attached Figure Description

[0030] Figure 1 This is a front view structural diagram of the present invention;

[0031] Figure 2 This is a schematic diagram of the rear view structure of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of the first preprocessing component of the present invention;

[0033] Figure 4 This is a schematic diagram of the distribution structure of the cleaning component on the pre-filtering component of the present invention;

[0034] Figure 5 This is a schematic diagram of the distribution structure of the wet thermal stretching component of the present invention on the second wastewater treatment component;

[0035] Figure 6 This is a schematic diagram of the heat-setting structure of the present invention;

[0036] Figure 7 This is a three-dimensional structural diagram of the discharge port distribution on the filter screen according to the present invention.

[0037] In the diagram: 1. Multi-stage stretching structure; 11. Base box; 12. First pretreatment assembly; 121. Spray box; 122. First guide roller; 123. Water supply pipe; 124. Cleaning nozzle; 125. First water inlet pipe; 126. First drain pipe; 13. Wet hot stretching assembly; 131. Water tank; 132. First electric heater; 133. Second guide roller; 134. Second water inlet pipe; 135. Second drain pipe; 14. Hot roller stretching assembly; 141. Stretching box; 142. Electric... 15. Heated guide roller body; 15. First dividing assembly; 151. Long line guide roller; 152. Dividing roller; 16. Air-cooling assembly; 161. Air-cooling box; 162. Air-cooling fan; 17. Second dividing assembly; 2. Waste liquid treatment structure; 21. Pre-filtration assembly; 211. Pre-filtration box; 212. Filter screen; 213. Discharge port; 214. Water receiving hopper; 215. Waste hopper; 22. Cleaning assembly; 221. First power source; 222. Rotating rod; 223. Connecting rod; 22 4. Telescopic component; 225. Scraper; 23. First wastewater treatment component; 231. First horizontal solid-liquid separator; 232. First infusion pipe; 233. First bag filter; 234. Second infusion pipe; 235. First activated carbon filter; 236. First reflux pipe; 24. Second wastewater treatment component; 241. Second horizontal solid-liquid separator; 242. Third infusion pipe; 243. Precision membrane filter; 244. Fourth infusion pipe; 245. Second activated carbon filter 246. Fifth infusion pipe; 25. Liquid storage assembly; 251. Liquid storage tank; 252. Heat conduction pipe; 3. Heat setting structure; 31. First heat setting assembly; 311. Heat setting box; 312. Second electric heater; 313. Guide roller; 32. Second heat setting assembly; 33. Third heat setting assembly; 34. Connecting box; 4. Heat energy recovery and processing assembly; 41. Air inlet pipe; 42. First air supply pipe; 43. Air filter body; 44. Air inlet pipe; 45. Air intake fan. Detailed Implementation

[0038] 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.

[0039] Please see Figure 1-7 This invention provides a technical solution: a multi-stage stretching and heat-setting acrylic filament preparation equipment and process, such as... Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, the system includes a multi-stage stretching structure 1, which includes a base box 11. A first pretreatment component 12, a wet hot stretching component 13, a hot roller stretching component 14, and an air-cooling component 16 are mounted on the upper side of the base box 11. The wet hot stretching component 13 is located to the right of the first pretreatment component 12, the hot roller stretching component 14 is located to the right of the wet hot stretching component 13, and the air-cooling component 16 is located to the right of the hot roller stretching component 14. A first branching component 15 is rotatably connected to the hot roller stretching component 14, and a second branching component 17 is rotatably connected inside the air-cooling component 16. The first pretreatment component 12 includes a spray box 121, with a first guide roller 122 rotatably connected to the spray box 121. A cleaning nozzle 124 is mounted on the upper side inside the spray box 121, and the cleaning nozzle 124 is connected to a water supply pipe 123. The upper side of the water supply pipe 123 is connected to a first water inlet pipe 125. The spray box 121 is located below... The first drain pipe 126 is connected to the side and used for wastewater discharge. The wet hot stretching assembly 13 includes a water tank 131, in which a first electric heater 132 is embedded. A second guide roller 133 is rotatably connected to the inner wall of the water tank 131. The rear side of the water tank 131 is connected to a second water inlet pipe 134. The lower side of the water tank 131 is connected to a second drain pipe 135 and used for wastewater discharge. The hot roller stretching assembly 14 includes a stretching box 141. An electric heating guide roller body 142 is rotatably connected to the stretching box 141 and used for hot roller stretching. The first splitting assembly 15 includes a long line guide roller 151. The long line guide roller 151 is rotatably connected to the stretching box 141. A splitting roller 152 is rotatably connected to the long line guide roller 151. The air-cooling assembly 16 includes an air-cooling box 161. An air-cooling fan 162 is installed on the upper side inside the air-cooling box 161. A second splitting assembly 17 is rotatably connected to the inner wall of the air-cooling box 161.

[0040] Among them, the bottom box 11 is equipped with a control device for controlling the overall equipment. The control device electrically controls the multi-stage stretching structure 1, the waste liquid treatment structure 2, the heat setting structure 3 and the heat energy recovery and treatment component 4.

[0041] Specifically, multiple sets of cleaning nozzles 124 are provided, and the multiple sets of cleaning nozzles 124 are evenly distributed on the upper side of the inside of the spray box 121.

[0042] One end of the first water inlet pipe 125 is connected to the water supply pipe 123, and the other end of the first water inlet pipe 125 is connected to the liquid storage tank 251;

[0043] Temperature sensors are installed in the water tank 131, the heat setting box 311, and the electric heating guide roller body 142. The temperature sensors are of model CWDZ11. The temperature sensors transmit the monitored data to the processor for processing. The processed data is then transmitted to the control device. With the assistance of the control device, the data is compared. When the set temperature is reached, the first electric heater 132, the second electric heater 312, and the third electric heater in the electric heating guide roller body 142 are turned off to avoid the temperature being too high or too low and affecting the processing quality of the acrylic filament.

[0044] A stirring component is installed on the lower side of the inside of the spray box 121. The stirring component includes a motor and stirring blades. The motor is installed on the spray box 121, and the motor output end is rotatably connected to the stirring blades to avoid the accumulation of impurities.

[0045] Furthermore, three long guide rollers 151 are provided, and the three long guide rollers 151 are evenly distributed on the stretching box 141, thereby guiding the yarn step by step, balancing the overall yarn tension, and avoiding shaking, deviation and yarn breakage caused by uneven local tension.

[0046] Two sets of second branch line assemblies 17 are rotatably connected inside the air-cooled box 161, and the two sets of second branch line assemblies 17 are symmetrically arranged about the central axis of the air-cooled box 161.

[0047] The air-cooled box 161 is connected to an exhaust pipe to discharge the gas generated by the wind waves;

[0048] The second branch assembly 17 and the first branch assembly 15 have the same structure;

[0049] The slitting roller 152 on the long guide roller 151 can prevent multiple long filaments from shifting laterally and getting tangled together, ensuring that the contact area between each filament and the hot roller is consistent, thus solving the problem of uneven heating.

[0050] A water level sensor, model HM21, is installed on the water tank 131 to monitor the water level in the water tank 131 in real time.

[0051] In the above scheme, the first guide roller 122 on the spray box 121 drives the acrylic filament to be guided. Under the assistance of the control device, the electric valve and the pressure pump on the first water inlet pipe 125 are started. With the assistance of the pressure pump on the first water inlet pipe 125, the liquid in the storage tank 251 is pressurized. The pressurized high-temperature liquid enters the cleaning nozzle 124 through the first water inlet pipe 125 and the water delivery pipe 123 and is sprayed out, thereby spraying and cleaning the acrylic filament. The cleaned acrylic filament enters the water tank 131 and is guided by the second guide roller 133 on the water tank 131. Under the assistance of the control device, the first electric heater 132 is started. Under the assistance of the first electric heater 132, the acrylic filament is heated. When the water temperature reaches the required temperature, the first electric heater 132 stops working. Under the assistance of the high-temperature liquid and the second guide roller 133, the acrylic filament is subjected to high-temperature wet treatment. The acrylic filament is stretched and then moved to the splitting roller 152 on the long guide roller 151 inside the stretching box 141. After being limited by the splitting roller 152, the acrylic filament moves to the electrically heated guide roller body 142. With the assistance of the electrically heated guide roller body 142, the acrylic filament is hot-rolled stretched. The stretched acrylic filament enters the air-cooling box 161 and is limited on the second splitting assembly 17. With the assistance of the second splitting assembly 17, the acrylic filament is limited and supported. With the assistance of the control device, the air-cooling fan 162 is started to air-cool the acrylic filament. With the assistance of the air-cooling fan 162, the acrylic filament is cooled. The end of the second water inlet pipe 134 away from the water tank 131 is connected to the liquid storage tank 251. An electric valve and a pressure pump are installed on the second water inlet pipe 134. With the assistance of the pressure pump on the second water inlet pipe 134, the clean water in the liquid storage tank 251 is pressurized and finally enters the water tank 131.

[0052] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the multi-stage stretching structure 1 is connected to the waste liquid treatment structure 2 and treats and recycles the waste liquid. The waste liquid treatment structure 2 includes a pre-filtration component 21, the lower side of which is connected to a cleaning component 22, and the lower side of the cleaning component 22 is connected to a first wastewater treatment component 23. The multi-stage filtration process ensures the filtration effect. A second wastewater treatment component 24 is arranged to the right of the first wastewater treatment component 23. The upper side of the second wastewater treatment component 24 is connected to a wet thermal stretching component 13, and the right side of the second wastewater treatment component 24 is connected to a liquid storage group. Component 25, the pre-filtration assembly 21 includes a pre-filtration box 211, a filter screen 212 installed inside the pre-filtration box 211, a discharge port 213 on the filter screen 212, a water receiving hopper 214 and a waste hopper 215 installed on the lower side of the pre-filtration box 211, the water receiving hopper 214 being located to the left of the waste hopper 215, the cleaning assembly 22 includes a first power source 221, the output end of the first power source 221 being rotatably connected to a rotating rod 222, the rotating rod 222 being rotatably connected to the filter screen 212, and a connecting rod 222 being installed on the rotating rod 222. Connecting rod 223, with telescopic component 224 installed on it, and scraper 225 installed on the lower side of telescopic component 224. The first wastewater treatment component 23 includes a first horizontal solid-liquid separator 231, which is connected to a first bag filter 233 via a first infusion pipe 232. One end of a second infusion pipe 234 is connected to the first bag filter 233, and the other end is connected to a first activated carbon filter 235. The lower side of the first activated carbon filter 235 is connected to a first reflux. Pipe 236, the second wastewater treatment component 24 includes a second horizontal solid-liquid separator 241, the second horizontal solid-liquid separator 241 is connected to a precision membrane filter 243 through a third infusion pipe 242, one end of a fourth infusion pipe 244 is connected to the precision membrane filter 243, the other end of the third infusion pipe 242 is connected to a second activated carbon filter 245, the lower side of the second activated carbon filter 245 is connected to a fifth infusion pipe 246, the liquid storage component 25 includes a liquid storage tank 251, and a heat-conducting pipe 252 is embedded in the liquid storage tank 251;

[0053] The waste liquid treatment structure 2 and the heat energy recovery treatment component 4 are both installed inside the heat energy recovery treatment component 4.

[0054] The first power source 221 is an electric motor, which is existing technology.

[0055] The telescopic component 224 includes a telescopic rod, a spring, a rubber sleeve, and a support ring plate. The telescopic rod passes through the spring, and the spring and the telescopic rod pass through the rubber sleeve. Both ends of the rubber sleeve, the spring, and the telescopic rod are embedded in the limiting grooves opened on the support ring plate.

[0056] The scraper 225 installed on the lower side of the telescopic component 224 is made of rubber.

[0057] Specifically, the first horizontal solid-liquid separator 231, the second horizontal solid-liquid separator 241, the first bag filter 233, the first activated carbon filter 235, the precision membrane filter 243, and the second activated carbon filter 245 are all existing technologies.

[0058] Furthermore, the heat pipe 252 is embedded and wound in a serpentine shape inside the liquid storage tank 251;

[0059] In the above scheme, the electric valves on the first drain pipe 126 and the second drain pipe 135 are opened, and wastewater is discharged through the first drain pipe 126 and the second drain pipe 135. The wastewater discharged from the first drain pipe 126 enters the pre-filtration box 211, where it is filtered with the assistance of the filter screen 212. The filtered wastewater enters the first horizontal solid-liquid separator 231 through the water receiving hopper 214. With the assistance of the control device, the first power source 221 is started, which drives the rotating rod 222 to rotate. The rotation of the rotating rod 222 drives the connecting rod 223 to rotate. The rotation of the connecting rod 223 drives the scraper 225 to move through the telescopic member 224. The scraper 225 moves the impurities on the surface of the filter screen 212. Impurities fall through discharge port 213 and are discharged through waste hopper 215. With the assistance of the control device, the electric valves and pressure pumps on the first delivery pipe 232, second delivery pipe 234, and first return pipe 236 are activated. Solid-liquid separation is performed with the assistance of the first horizontal solid-liquid separator 231. The filtered wastewater enters the first delivery pipe 232 and, with the assistance of the pressure pump on the first delivery pipe 232, enters the first bag filter 233. It is filtered again with the assistance of the first bag filter 233, and the filtered liquid enters the second delivery pipe 234. With the assistance of the pressure pump on the second delivery pipe 234, the liquid enters the first activated carbon filter 235. The water undergoes further filtration with the assistance of filter 235, thus achieving multi-stage filtration to ensure the quality of the circulating water. The circulating water filtered by the first activated carbon filter 235 enters the first return pipe 236, where it is further filtered by a pressure pump. The circulating water is then stored in the storage tank 251 through the first return pipe 236. Wastewater discharged from the second drain pipe 135 enters the second horizontal solid-liquid separator 241, where solid-liquid separation is performed. The separated wastewater enters the third delivery pipe 242. With the assistance of the control device, the electric valves and pressure pumps on the third delivery pipe 242, fourth delivery pipe 244, and fifth delivery pipe 246 are activated. The pressure pump on the third delivery pipe 242... With the assistance of the third infusion pipe 242, the wastewater enters the precision membrane filter 243. The precision membrane filter 243 intercepts the ultrafine particles remaining after solid-liquid separation, further improving the water cleanliness. The filtered liquid enters the fourth infusion pipe 244. With the assistance of the pressure pump on the fourth infusion pipe 244, it enters the second activated carbon filter 245. With the assistance of the second activated carbon filter 245, trace amounts of additives and slight odors are adsorbed, stabilizing the water quality and color, and extending the service life of the circulating water. The treated circulating water enters the fifth infusion pipe 246. With the assistance of the pressure pump on the fifth infusion pipe 246, the circulating water is stored in the storage tank 251 through the fifth infusion pipe 246, avoiding water waste.

[0060] like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, a heat-setting structure 3 is installed on the upper side of the multi-stage stretching structure 1 and is used for heat-setting acrylic filaments. The heat-setting structure 3 includes a connecting box 34, in which a first heat-setting component 31, a second heat-setting component 32 and a third heat-setting component 33 are installed. The second heat-setting component 32 is located to the right of the first heat-setting component 31, and the third heat-setting component 33 is located to the right of the second heat-setting component 32. The first heat-setting component 31 includes a heat-setting box 311, in which a second electric heater 312 is embedded. A guide roller 313 is rotatably connected inside the heat-setting box 311.

[0061] Among them, the first heat setting component 31, the second heat setting component 32 and the third heat setting component 33 have the same structure;

[0062] Furthermore, a first branching assembly 15 is installed between the first heat setting assembly 31, the second heat setting assembly 32 and the third heat setting assembly 33 and inside the heat setting box 311;

[0063] Specifically, the heat setting box 311 is for medium-temperature preheating, gradually increasing the silk temperature. The second heat setting component 32 is the highest temperature zone and the main setting zone. The third heat setting component 33 is for slight cooling transition, slow cooling to reduce thermal shock and improve stability.

[0064] In the preferred embodiment, the second electric heater 312 is started with the assistance of the control device, and the temperature sensor on the heat setting box 311 is used for stable real-time monitoring. The first filament splitting assembly 15 on the heat setting box 311 is used for uniform splitting, and the filaments are guided by the guide roller 313. The high-temperature gas in the heat setting box 311 is used for pre-drying and setting. The acrylic filaments pre-treated by the first heat setting assembly 31 enter the second heat setting assembly 32 for high-temperature setting. Finally, the acrylic filaments enter the third heat setting assembly 33 for low-temperature relaxation setting, which improves the fiber size stability and avoids shrinkage and uneven curling.

[0065] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, the heat energy recovery and processing component 4 connects the heat setting structure 3 and the waste liquid treatment structure 2 and recovers and reprocesses the high-temperature heat energy. The heat energy recovery and processing component 4 includes an air inlet pipe 41, one end of which is connected to the heat setting box 311, and the other end of which is connected to the first air supply pipe 42. The first air supply pipe 42 is connected to the air filter body 43, and one end of the air inlet pipe 44 is connected to the air filter body 43, and the other end is connected to the heat conduction pipe 252. An air intake fan 45 is installed inside the air inlet pipe 44.

[0066] Among them, the air filter body 43 is existing technology;

[0067] In the preferred embodiment, with the assistance of the control device, the air filter body 43 and the air intake fan 45 in the air intake pipe 44 are started. With the assistance of the air intake fan 45, the high-temperature gas generated by the heat setting structure 3 and the hot roller stretching assembly 14 is accelerated to enter the air filter body 43 through the air intake pipe 41 and the first air supply pipe 42. With the assistance of the air filter body 43, the high-temperature hot air is filtered and purified, and fiber debris, dust and flocculent matter entrained in the hot air are intercepted to prevent impurities from entering the subsequent heat conduction pipe 252 and causing pipe blockage. The filtered hot air enters the heat conduction pipe 252 through the air intake pipe 44. With the assistance of the heat conduction pipe 252, the liquid in the liquid storage tank 251 is heated, thereby recovering and reusing heat resources and increasing practicality.

[0068] Working principle: When using this multi-stage stretching and heat-setting acrylic filament preparation equipment and process, with an external power supply, the acrylic filament is stretched and air-cooled through the multi-stage stretching structure 1. After multi-stage stretching, the acrylic filament undergoes three-stage gradient temperature control and step-by-step setting under the assistance of the heat-setting structure 3 to ensure the setting effect. The high-temperature hot air generated by the heat-setting structure 3 and the hot roller stretching assembly 14 is recovered and filtered through the heat energy recovery and treatment assembly 4 and enters the heat conduction pipe 252, thereby heating the liquid in the storage tank 251 used for cleaning the nozzle 124 and the water tank 131, avoiding heat energy waste. The wastewater generated by the multi-stage stretching structure 1 is treated by multi-stage filtration through the waste liquid treatment structure 2 to ensure the quality of the circulating liquid.

[0069] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention.

[0070] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-stage stretching and heat-setting acrylic filament preparation device, characterized in that, It includes a multi-stage stretching structure (1), which is connected to a waste liquid treatment structure (2) and treats and recycles the waste liquid. A heat setting structure (3) is installed on the upper side of the multi-stage stretching structure (1) and is used for heat setting treatment of acrylonitrile filament. A heat energy recovery and treatment component (4) is connected to the heat setting structure (3) and the waste liquid treatment structure (2) and recovers and reprocesses the high-temperature heat energy. The multi-stage stretching structure (1) includes a base box (11). A first pretreatment component (12), a wet hot stretching component (13), a hot roller stretching component (14), and an air-cooling component (16) are installed on the upper side of the base box (11). A wet hot stretching component (13) is provided on the right side of the first pretreatment component (12). A hot roller stretching component (14) is provided on the right side of the wet hot stretching component (13). An air-cooling component (16) is provided on the right side of the hot roller stretching component (14). A first branching component (15) is rotatably connected to the hot roller stretching component (14). A second branching component (17) is rotatably connected inside the air-cooling component (16). The first pretreatment component (12) includes a spray box (121), a first guide roller (122) is rotatably connected to the spray box (121), a cleaning nozzle (124) is installed on the upper side inside the spray box (121), the cleaning nozzle (124) is connected to a water supply pipe (123), the upper side of the water supply pipe (123) is connected to a first water inlet pipe (125), and the lower side of the spray box (121) is connected to a first drain pipe (126) for wastewater discharge; The wet thermal stretching assembly (13) includes a water tank (131), a first electric heater (132) is embedded in the water tank (131), a second guide roller (133) is rotatably connected to the inner wall of the water tank (131), a second water inlet pipe (134) is connected to the rear side of the water tank (131), and a second drain pipe (135) is connected to the lower side of the water tank (131) for wastewater discharge; The hot roller stretching assembly (14) includes a stretching box (141), on which an electrically heated guide roller body (142) is rotatably connected and used for hot roller stretching; The first line-separating assembly (15) includes a long line guide roller (151), which is rotatably connected to the stretching box (141), and a line-separating roller (152) is rotatably connected to the long line guide roller (151). The air-cooled assembly (16) includes an air-cooled box (161), and an air-cooled fan (162) is installed on the upper side inside the air-cooled box (161). A second branch assembly (17) is rotatably connected to the inner wall of the air-cooled box (161). The heat setting structure (3) includes a connecting box (34), in which a first heat setting component (31), a second heat setting component (32) and a third heat setting component (33) are installed. The second heat setting component (32) is provided on the right side of the first heat setting component (31), and the third heat setting component (33) is provided on the right side of the second heat setting component (32). The first heat setting assembly (31) includes a heat setting box (311), a second electric heater (312) is embedded in the heat setting box (311), and a wire roller (313) is rotatably connected inside the heat setting box (311). The heat energy recovery and processing component (4) includes an air inlet pipe (41), one end of which is connected to a heat setting box (311), and the other end of which is connected to a first air supply pipe (42). The first air supply pipe (42) is connected to an air filter body (43). One end of the air inlet pipe (44) is connected to the air filter body (43), and the other end is connected to a heat conduction pipe (252). An air intake fan (45) is installed inside the air inlet pipe (44).

2. The multi-stage stretching and heat-setting acrylic filament preparation equipment according to claim 1, characterized in that: The waste liquid treatment structure (2) includes a pre-filtration component (21), the lower side of the pre-filtration component (21) is connected to the cleaning component (22), the lower side of the cleaning component (22) is connected to the first wastewater treatment component (23), the multi-stage filtration treatment ensures the filtration effect, the right side of the first wastewater treatment component (23) is provided with a second wastewater treatment component (24), the upper side of the second wastewater treatment component (24) is connected to the wet thermal stretching component (13), the right side of the second wastewater treatment component (24) is connected to the liquid storage component (25).

3. The multi-stage stretching and heat-setting acrylic filament preparation equipment according to claim 2, characterized in that: The pre-filtration assembly (21) includes a pre-filtration box (211), a filter screen (212) is installed inside the pre-filtration box (211), a discharge port (213) is opened on the filter screen (212), a water receiving hopper (214) and a waste hopper (215) are installed on the lower side of the pre-filtration box (211), and the water receiving hopper (214) is located to the left of the waste hopper (215).

4. The multi-stage stretching and heat-setting acrylic filament preparation equipment according to claim 2, characterized in that: The cleaning component (22) includes a first power source (221), the output end of which is rotatably connected to a rotating rod (222), the rotating rod (222) is rotatably connected to a filter screen (212), a connecting rod (223) is installed on the rotating rod (222), a telescopic component (224) is installed on the connecting rod (223), and a scraper (225) is installed on the lower side of the telescopic component (224).

5. The multi-stage stretching and heat-setting acrylic filament preparation equipment according to claim 2, characterized in that: The first wastewater treatment component (23) includes a first horizontal solid-liquid separator (231), which is connected to a first bag filter (233) via a first infusion pipe (232). One end of a second infusion pipe (234) is connected to the first bag filter (233), and the other end of the second infusion pipe (234) is connected to a first activated carbon filter (235). The lower side of the first activated carbon filter (235) is connected to a first return pipe (236).

6. The multi-stage stretching and heat-setting acrylic filament preparation equipment according to claim 2, characterized in that: The second wastewater treatment component (24) includes a second horizontal solid-liquid separator (241), which is connected to a precision membrane filter (243) via a third infusion pipe (242), one end of a fourth infusion pipe (244) is connected to the precision membrane filter (243), the other end of the third infusion pipe (242) is connected to a second activated carbon filter (245), and the lower side of the second activated carbon filter (245) is connected to a fifth infusion pipe (246).

7. The multi-stage stretching and heat-setting acrylic filament preparation equipment according to claim 2, characterized in that: The liquid storage assembly (25) includes a liquid storage tank (251), and a heat-conducting pipe (252) is embedded in the liquid storage tank (251).

8. A multi-stage stretching and heat-setting process for producing acrylic filaments, characterized in that, Includes the following steps, (1) Multi-stage stretching of acrylic filament a. The first guide roller (122) on the spray box (121) drives the acrylic filament to be guided. With the assistance of the control device, the electric valve and the pressurizing pump on the first water inlet pipe (125) are started. With the assistance of the pressurizing pump on the first water inlet pipe (125), the liquid in the storage tank (251) is pressurized. The pressurized high temperature liquid enters the cleaning nozzle (124) through the first water inlet pipe (125) and the water delivery pipe (123) and is sprayed out, thereby spraying and cleaning the acrylic filament. b. The cleaned acrylic filaments enter the water tank (131) and are guided by the second guide roller (133) on the water tank (131). The first electric heater (132) is started with the assistance of the control device. The first electric heater (132) is heated with the assistance of the first electric heater (132). When the water temperature reaches the required temperature, the first electric heater (132) stops working. The acrylic filaments are then subjected to high-temperature wet stretching with the assistance of the high-temperature liquid and the second guide roller (133). c. The stretched acrylic filament is moved to the splitting roller (152) on the long guide roller (151) in the stretching box (141). After being limited by the splitting roller (152), the acrylic filament is moved to the electric heating guide roller body (142). The acrylic filament is hot-rolled stretched under the assistance of the electric heating guide roller body (142). d. The stretched acrylic filament enters the air-cooled box (161) and is limited on the second splitting assembly (17), thereby limiting and supporting the acrylic filament with the assistance of the second splitting assembly (17). With the assistance of the control device, the air-cooling fan (162) is started, and the acrylic filament is cooled by air cooling with the assistance of the air-cooling fan (162). (2) Heat setting of acrylic filament a. The second electric heater (312) is started with the assistance of the control device. The temperature sensor on the heat setting box (311) is used for stable real-time monitoring. The first splitting assembly (15) on the heat setting box (311) is used for uniform splitting. The wire is then guided by the wire roller (313). The high temperature gas in the heat setting box (311) is used for pre-drying and setting. The acrylic filaments that have been pre-treated by the first heat setting assembly (31) enter the second heat setting assembly (32) for high-temperature setting. Finally, the acrylic filaments enter the third heat setting assembly (33) for low-temperature relaxation setting, which improves the fiber size stability and avoids shrinkage and uneven curling. (3) Thermal energy recovery a. With the assistance of the control device, the air filter body (43) and the air intake pipe (44) start the air intake fan (45). With the assistance of the air intake fan (45), the high temperature gas generated by the heat setting structure (3) and the hot roller stretching assembly (14) is accelerated to enter the air filter body (43) through the air intake pipe (41) and the first air supply pipe (42). With the assistance of the air filter body (43), the high temperature hot air is filtered and purified, and the fiber debris, dust and flocculent matter carried in the hot air are intercepted to prevent impurities from entering the subsequent heat conduction pipe (252) and causing pipeline blockage. The filtered hot air enters the heat conduction pipe (252) through the air intake pipe (44). With the assistance of the heat conduction pipe (252), the liquid in the liquid storage tank (251) is heated, thereby recovering and reusing the heat resources. (4) The waste liquid generated by multi-stage stretching is filtered in multiple stages and recycled. a. Open the electric valves on the first drain pipe (126) and the second drain pipe (135). Wastewater is discharged through the first drain pipe (126) and the second drain pipe (135). The wastewater discharged from the first drain pipe (126) enters the pre-filter box (211) and is filtered with the assistance of the filter screen (212). The filtered wastewater enters the first horizontal solid-liquid separator (231) through the water receiving hopper (214). The first power source (221) is started with the assistance of the control device. The first power source (221) drives the rotating rod (222) to rotate. The rotating rod (222) drives the connecting rod (223) to rotate. The rotating rod (223) drives the scraper (225) to move through the telescopic part (224). The scraper (225) moves the impurities on the surface of the filter screen (212). Finally, the impurities fall through the discharge port (213) and are discharged through the waste hopper (215). b. With the assistance of the control device, start the electric valves and pressure pumps on the first infusion pipe (232), the second infusion pipe (234), and the first return pipe (236). With the assistance of the first horizontal solid-liquid separator (231), solid-liquid separation is carried out. The filtered wastewater enters the first infusion pipe (232). With the assistance of the pressure pump on the first infusion pipe (232), it enters the first bag filter (233). With the assistance of the first bag filter (233), it is filtered again. The filtered liquid enters the second infusion pipe (234). 4) With the assistance of the pressurizing pump on the second infusion pipe (234), the liquid enters the first activated carbon filter (235) through the second infusion pipe (234). With the assistance of the first activated carbon filter (235), it is filtered again, thus achieving multi-stage filtration to ensure the quality of circulating water. The circulating water filtered by the first activated carbon filter (235) enters the first return pipe (236) and is filtered again with the assistance of the pressurizing pump on the first return pipe (236). The circulating water is stored in the storage tank (251) through the first return pipe (236). c. Wastewater discharged from the second drain pipe (135) enters the second horizontal solid-liquid separator (241). Solid-liquid separation is carried out with the assistance of the second horizontal solid-liquid separator (241). The separated wastewater enters the third delivery pipe (242). With the assistance of the control device, the electric valves and pressure pumps on the third delivery pipe (242), the fourth delivery pipe (244), and the fifth delivery pipe (246) are activated. With the assistance of the pressure pump on the third delivery pipe (242), the wastewater enters the precision membrane filter (243) through the third delivery pipe (242). With the assistance of the precision membrane filter (243), the wastewater is intercepted. The ultrafine particles remaining after solid-liquid separation further improve the water cleanliness. The filtered liquid enters the fourth infusion pipe (244), and with the assistance of the pressure pump on the fourth infusion pipe (244), it enters the second activated carbon filter (245). With the assistance of the second activated carbon filter (245), trace additives and slight odors are adsorbed, stabilizing the water quality and color, and extending the service life of the circulating water. The treated circulating water enters the fifth infusion pipe (246), and with the assistance of the pressure pump on the fifth infusion pipe (246), the circulating water is stored in the storage tank (251) through the fifth infusion pipe (246), avoiding water waste.

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