Film cooling and waste heat utilization system in degradable winding film production line

Abstract

The invention relates to a film cooling and waste heat utilization system in a degradable wrapping film production line, and belongs to the technical field of degradable wrapping film production. The lower-layer reversing roller A and the lower-layer reversing roller D are located at the same height, the upper-layer reversing roller B and the upper-layer reversing roller C are higher than the horizontal plane where the lower-layer reversing roller A is located, a first air cooling mechanism is arranged on one side of the upper-layer reversing roller B, a second air cooling mechanism is arranged on one side of the upper-layer reversing roller C, and the rear portion of the first air cooling mechanism is connected with a heat collection box. The top of the heat collection box body is provided with an air inlet connector. Compared with the prior art, the device has the following beneficial effects that a to-be-processed coil material needs to be preheated through the heat collection box body and then is compounded, the surface of a compounded degradable winding film can be cooled through the first air cooling mechanism and the second air cooling mechanism, meanwhile, waste heat recycled by the first air cooling mechanism can be used for preheating the to-be-processed coil material through the heat collection box body, and the heat dissipation efficiency is improved. The recycling of heat is realized, and the compounding effect of the degradable wrapping film is improved.

Description

Technical Field

[0001] The present invention relates to a film cooling and waste heat utilization system in a degradable winding film production line, belonging to the technical field of degradable winding film production. Background Art

[0002] As a new type of green packaging solution, degradable winding films achieve environmentally friendly characteristics through special material formulations. Such materials can be completely decomposed by microbial action under natural conditions, and their environmental protection advantages are mainly reflected in three aspects: First, the material components meet the food contact safety standards, ensuring no toxicity risk during use; second, the products have excellent optical and mechanical properties, meeting the protection requirements of various packaging scenarios; finally, after being discarded, they can be converted into harmless substances such as water and carbon dioxide under composting conditions, avoiding white pollution.

[0003] In the production process, temperature control is a key link to ensure product quality. Modern production lines generally adopt an air-cooling system, which evenly transports air adjusted in temperature and humidity to the surface of the film material through a precisely designed ventilation duct network. This non-contact cooling method can not only effectively control the crystallization process of the product but also avoid damage to the material properties caused by traditional water cooling. The entire system is usually linked and controlled with the extrusion molding equipment to form a continuous production line.

[0004] The patent with the patent number 202221335634.9 discloses a winding device for producing biodegradable winding films, including a base. The lower outer surface of the base is fixedly installed with support feet, the front outer surface of the base is provided with a control panel, the upper outer surface of the base is provided with a mounting plate, a movable shaft is arranged between the inner surfaces of the mounting plate, a unwind roller is arranged on the outer surface of the movable shaft, and a lifting adjustment device for improving the convenience of winding film tension adjustment is arranged on one side of the mounting plate. The lifting adjustment device includes an electric push rod, and a lower end mounting block is arranged between one end of the electric push rod and the upper outer surface of the base. The disclosed winding device for producing biodegradable winding films has a simple structure and convenient operation. By setting the lifting adjustment device, it improves the convenience of tension adjustment during winding of the winding film, ensures the flatness of the winding film during winding, and can also guide the winding film, improving the winding efficiency.

[0005] Although the above patent can achieve the winding function of degradable winding films, the prior art has incomplete considerations and has the following drawbacks: It lacks a first air-cooling mechanism and a second air-cooling mechanism to cool the surface of the composite degradable winding film, and it cannot preheat the to-be-processed roll materials through a heat collection box with the waste heat recovered by the first air-cooling mechanism, thus failing to realize the recovery and utilization of heat and also failing to enhance the composite effect of degradable winding films.

[0006] To solve one of the above problems, there is an urgent need for a film cooling and waste heat utilization system in a degradable winding film production line. Summary of the Invention

[0007] Based on the above deficiencies in the prior art, the technical problem to be solved by the present invention is: how to cool the surface of the composite degradable winding film by the first air cooling mechanism and the second air cooling mechanism, and at the same time, the waste heat recovered by the first air cooling mechanism can preheat the to-be-processed coil material through the heat collecting box, realizing the recovery and utilization of heat, and improving the composite effect of the degradable winding film. For this purpose, a film cooling and waste heat utilization system in a degradable winding film production line is provided.

[0008] The film cooling and waste heat utilization system in the degradable winding film production line of the present invention includes a lower layer reversing roller A, an upper layer reversing roller B, an upper layer reversing roller C, and a lower layer reversing roller D. The degradable winding film to be cooled bypasses through the lower layer reversing roller A, the upper layer reversing roller B, the upper layer reversing roller C, and the lower layer reversing roller D in sequence. It is characterized in that: the lower layer reversing roller A and the lower layer reversing roller D are at the same height, the heights of the upper layer reversing roller B and the upper layer reversing roller C are higher than the horizontal plane where the lower layer reversing roller A is located, a first air cooling mechanism is arranged on one side of the upper layer reversing roller B, a second air cooling mechanism is arranged on one side of the upper layer reversing roller C, the first air cooling mechanism is connected to a heat collecting box at the back, the two ends of the heat collecting box are respectively provided with a tape inlet and a tape outlet, and the top of the heat collecting box is an air inlet interface.

[0009] The to-be-processed coil material needs to be preheated by the heat collecting box first and then be compounded. This application can use the first air cooling mechanism and the second air cooling mechanism to cool the surface of the composite degradable winding film. At the same time, the waste heat recovered by the first air cooling mechanism can preheat the to-be-processed coil material through the heat collecting box, realizing the recovery and utilization of heat, and improving the composite effect of the degradable winding film.

[0010] Preferably, the first air cooling mechanism includes a first frame and a second frame arranged at intervals. The bottoms of the first frame and the second frame are installed with a gas distribution main pipe and a gas collection main pipe arranged at intervals. The upper layer reversing roller B is also installed between the first frame and the second frame. The first air cooling mechanism evenly distributes gas through the gas distribution main pipe to cool the surface of the degradable winding film, and the hot air after heat exchange will be effectively recovered through the gas collection main pipe, thereby improving the cooling efficiency of the degradable winding film.

[0011] Preferably, the first frame includes vertical air pipes A and B that are parallel to each other. The tops of the vertical air pipes A and B are respectively connected with connecting elbows A and B. The other ends of the connecting elbows A and B are respectively connected to both ends of the main valve A. An external air pipe A is connected to the bypass interface of the connecting elbow A. The other end of the external air pipe A is connected with a sub-valve B. A first air filter is installed at the air inlet of the sub-valve B. An external air pipe B is connected to the bypass interface of the connecting elbow B. A sub-valve C is installed on the external air pipe B. A pipe joint A is installed at the bottom end of the vertical air pipe A. A telescopic pipe A is connected to the pipe joint A. The other end of the telescopic pipe A is connected with a main air distribution pipe joint A. A pipe joint B is installed at the bottom end of the vertical air pipe B. A telescopic pipe B is connected to the pipe joint B. The other end of the telescopic pipe B is connected with a main air collection pipe joint B. An upper cross beam A is installed between the pipe joint A and the pipe joint B. A lower cross beam A is installed between the main air distribution pipe joint A and the main air collection pipe joint B. A first lifting cylinder is installed between the pipe joint A and the main air distribution pipe joint A. A second lifting cylinder is installed between the pipe joint B and the main air collection pipe joint B. One end of the upper layer reversing roller B is rotatably installed on the upper cross beam B. A first tensioning roller is rotatably installed on the lower cross beam A.

[0012] The degradable winding film bypasses around the first tensioning roller and the upper layer reversing roller B. The main air distribution pipe joint A and the main air collection pipe joint B are of a lifting structure. The first tensioning roller can be lifted and lowered with the lower cross beam A to change the height of the first tensioning roller and adjust the tensioning effect of the degradable winding film. Air can be supplied into the main air distribution pipe through the fan B, the first air filter, the sub-valve B, the connecting elbow A, the vertical air pipe A, the pipe joint A, the telescopic pipe A, and the main air distribution pipe joint A. The first air cooling mechanism uses the main air distribution pipe to distribute air evenly to cool the surface of the degradable winding film. Moreover, the hot air after heat exchange will be effectively recovered by the main air collection pipe. The hot air recovered by the main air collection pipe enters the heat collection box through the main air collection pipe joint B, the telescopic pipe B, the pipe joint B, the vertical air pipe B, the connecting elbow B, the external air pipe B, the sub-valve C, and the fan A. The fan A provides the power for the air outlet.

[0013] Preferably, the second frame includes vertical air pipes C and D that are parallel to each other. The tops of the vertical air pipes C and D are respectively connected with connecting elbows C and D. The other ends of the connecting elbows C and D are respectively connected to both ends of the main valve D. An external air pipe C is connected to the bypass interface of the connecting elbow C. The other end of the external air pipe C is connected with a sub-valve E. A second air filter is installed at the air inlet of the sub-valve E. An external air pipe D is connected to the bypass interface of the connecting elbow D. A sub-valve F is installed on the external air pipe D. A pipe joint C is installed at the bottom end of the vertical air pipe C. A telescopic pipe C is connected to the pipe joint C. The other end of the telescopic pipe C is connected with a main air distribution joint C. A pipe joint D is installed at the bottom end of the vertical air pipe D. A telescopic pipe D is connected to the pipe joint D. The other end of the telescopic pipe D is connected with a main air collection joint D. An upper cross beam B is installed between the pipe joint D and the telescopic pipe C. A lower cross beam B is installed between the main air distribution joint C and the main air collection joint D. A third lifting cylinder is installed between the pipe joint C and the main air distribution joint C. A fourth lifting cylinder is installed between the pipe joint D and the main air collection joint D. The other end of the upper layer reversing roller B is rotatably installed on the upper cross beam B. The other end of the first tensioning roller is rotatably installed on the lower cross beam B. A main air distribution pipe is installed between the main air distribution joint A and the main air distribution joint C. A main air collection pipe is installed between the main air collection joint B and the main air collection joint D.

[0014] Preferably, multiple air outlet nozzles are arranged on one side of the main air distribution pipe, and multiple air inlet nozzles are arranged on one side of the main air collection pipe. Optimize the gas flow path and improve the cooling effect.

[0015] Preferably, return air branch pipes are respectively connected to the sub-valve C and the sub-valve F. After the two return air branch pipes merge, they are connected to the heat collection box body. A fan A is installed on the main pipe after the merge of the return air branch pipes. The air inlets of the first air filter and the second air filter are both connected to the air outlet of the fan B. The fans A and B are the power sources for air supply and return air.

[0016] Preferably, the second air cooling mechanism includes direct blowing cooling fans. Multiple groups of direct blowing cooling fans are provided and all face the degradable winding film.

[0017] Preferably, the first lifting cylinder, the second lifting cylinder, the third lifting cylinder, and the fourth lifting cylinder move synchronously.

[0018] Preferably, the upper layer reversing roller B is directly above the first tensioning roller, and the distance between the upper layer reversing roller B and the first tensioning roller is adjustable.

[0019] Preferably, reinforcing rib plates are provided between the upper cross beam A and the pipe joint A, and between the upper cross beam A and the pipe joint B.

[0020] Compared with the prior art, the present invention has the following beneficial effects: In the film cooling and waste heat utilization system of the degradable winding film production line of the present invention, the to-be-processed coil needs to be preheated by the heat collection box first and then compounded. This application can use the first air cooling mechanism and the second air cooling mechanism to cool the surface of the compounded degradable winding film. At the same time, the waste heat recovered by the first air cooling mechanism can be used to preheat the to-be-processed coil through the heat collection box, realizing the recovery and utilization of heat and improving the compounding effect of the degradable winding film.

[0021] In the film cooling and waste heat utilization system of the degradable winding film production line of the present invention, the first air cooling mechanism uses a main air distribution pipe to distribute air evenly to cool the surface of the degradable winding film, and the hot air after heat exchange will be effectively recovered through the main air collection pipe, thereby improving the cooling efficiency of the degradable winding film.

[0022] In the film cooling and waste heat utilization system of the degradable winding film production line of the present invention, the degradable winding film bypasses the first tension roller and the upper layer reversing roller B. The main air distribution pipe joint A and the main air collection pipe joint B are lifting structures, and the first tension roller can be lifted with the lower cross beam A to change the height of the first tension roller and adjust the tension effect of the degradable winding film. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0024] Figure 1 Structural schematic of the present invention Figure 1 ; Figure 2 Structural schematic of the present invention Figure 2 ; Figure 3 External structural schematic of the main air distribution pipe of the present invention; Figure 4 External structural schematic of the first lifting cylinder.

[0025] In the figure: 1. Lower layer reversing roller A; 2. Upper layer reversing roller B; 3. Upper layer reversing roller C; 4. Lower layer reversing roller D; 5. Heat collecting box body; 6. Vertical air pipe A; 7. Connecting elbow A; 8. Vertical air pipe B; 9. Connecting elbow B; 10. Main valve A; 11. External air pipe A; 12. Sub-valve B; 13. External air pipe B; 14. Sub-valve C; 15. First air filter; 16. Pipe joint A; 17. Pipe joint B; 18. Telescopic pipe A; 19. Telescopic pipe B; 20. First lifting cylinder; 21. Second lifting cylinder; 22. Air distribution main pipe joint A; 23. Air collecting main pipe joint B; 24. Upper cross beam A; 25. Lower cross beam A; 26. Vertical air pipe C; 27. Connecting elbow C; 28. Vertical air pipe D; 29. Connecting elbow D; 30. Main valve D; 31. External air pipe C; 32. Sub-valve E; 33. External air pipe D; 34. Sub-valve F; 35. Second air filter; 36. Pipe joint C; 37. Pipe joint D; 38. Telescopic pipe C; 39. Telescopic pipe D; 40. Third lifting cylinder; 41. Fourth lifting cylinder; 42. Air distribution main pipe joint C; 43. Air collecting main pipe joint D; 44. Upper cross beam B; 45. Lower cross beam B; 46. First tensioning roller; 47. Air distribution main pipe; 48. Air collecting main pipe; 49. Fan A; 50. Fan B; 51. Direct blowing cooling fan. Specific implementation mode

[0026] The present invention will be further described below with reference to the accompanying drawings: The following further illustrates the present invention through specific embodiments, but the present invention is not limited thereto. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0027] Example 1, as Figure 1-2 shown, in the film cooling and waste heat utilization system in a degradable winding film production line, it includes a lower layer reversing roller A1, an upper layer reversing roller B2, an upper layer reversing roller C3, and a lower layer reversing roller D4. The degradable winding film to be cooled bypasses through the lower layer reversing roller A1, the upper layer reversing roller B2, the upper layer reversing roller C3, and the lower layer reversing roller D4 in sequence. The lower layer reversing roller A1 and the lower layer reversing roller D4 are at the same height. The heights of the upper layer reversing roller B2 and the upper layer reversing roller C3 are higher than the horizontal plane where the lower layer reversing roller A1 is located. A first air cooling mechanism is arranged on one side of the upper layer reversing roller B2, and a second air cooling mechanism is arranged on one side of the upper layer reversing roller C3. The first air cooling mechanism is connected to a heat collecting box body 5 at the back. The two ends of the heat collecting box body 5 are respectively provided with an inlet for the film and an outlet for the film. The top of the heat collecting box body 5 is an air inlet interface.

[0028] The to-be-processed coil stock needs to be preheated by the heat collection box 5 first and then compounded. This application can use the first air-cooling mechanism and the second air-cooling mechanism to cool the surface of the composite degradable winding film. At the same time, the waste heat recovered by the first air-cooling mechanism can preheat the to-be-processed coil stock through the heat collection box 5, realizing the recovery and utilization of heat and improving the compounding effect of the degradable winding film.

[0029] Embodiment 2, as Figure 1 、 Figure 2 and Figure 4 shown, the film cooling and waste heat utilization system in a degradable winding film production line includes a lower layer reversing roller A1, an upper layer reversing roller B2, an upper layer reversing roller C3, and a lower layer reversing roller D4. The degradable winding film to be cooled bypasses the lower layer reversing roller A1, the upper layer reversing roller B2, the upper layer reversing roller C3, and the lower layer reversing roller D4 in sequence. The lower layer reversing roller A1 and the lower layer reversing roller D4 are at the same height. The heights of the upper layer reversing roller B2 and the upper layer reversing roller C3 are higher than the horizontal plane where the lower layer reversing roller A1 is located. A first air-cooling mechanism is arranged on one side of the upper layer reversing roller B2, and a second air-cooling mechanism is arranged on one side of the upper layer reversing roller C3. The first air-cooling mechanism is connected to the heat collection box 5 at the back. The two ends of the heat collection box 5 are respectively provided with an inlet belt opening and an outlet belt opening. The top of the heat collection box 5 is an air inlet interface.

[0030] Furthermore, the first air-cooling mechanism includes a first frame and a second frame arranged at intervals. The bottoms of the first frame and the second frame are installed with a gas distribution main pipe 47 and a gas collection main pipe 48 arranged at intervals. The upper layer reversing roller B2 is also installed between the first frame and the second frame.

[0031] The first air-cooling mechanism evenly distributes gas through the gas distribution main pipe 47 to cool the surface of the degradable winding film, and the hot air after heat exchange will be effectively recovered through the gas collection main pipe 48, thereby improving the cooling efficiency of the degradable winding film.

[0032] Further, the first frame includes vertical air pipes A6 and vertical air pipes B8 that are parallel to each other. The tops of the vertical air pipes A6 and vertical air pipes B8 are respectively connected with connecting elbows A7 and connecting elbows B9. The other ends of the connecting elbows A7 and connecting elbows B9 are respectively connected to both ends of the main valve A10. An external air pipe A11 is connected to the bypass interface of the connecting elbow A7. The other end of the external air pipe A11 is connected with a sub-valve B12. A first air filter 15 is installed at the air inlet of the sub-valve B12. An external air pipe B13 is connected to the bypass interface of the connecting elbow B9. A sub-valve C14 is installed on the external air pipe B13. A pipe joint A16 is installed at the bottom end of the vertical air pipe A6. A telescopic pipe A18 is connected to the pipe joint A16. The other end of the telescopic pipe A18 is connected with a main air distribution joint A22. A pipe joint B17 is installed at the bottom end of the vertical air pipe B8. A telescopic pipe B19 is connected to the pipe joint B17. The other end of the telescopic pipe B19 is connected with a main gas collection joint B23. An upper cross beam A24 is installed between the pipe joint A16 and the pipe joint B17. A lower cross beam A25 is installed between the main air distribution joint A22 and the main gas collection joint B23. A first lifting cylinder 20 is installed between the pipe joint A16 and the main air distribution joint A22. A second lifting cylinder 21 is installed between the pipe joint B17 and the main gas collection joint B23. One end of the upper layer reversing roller B2 is rotatably installed on the upper cross beam B44. A first tensioning roller 46 is rotatably installed on the lower cross beam A25.

[0033] The degradable winding film bypasses around the first tensioning roller 46 and the upper layer reversing roller B2. The main air distribution joint A22 and the main gas collection joint B23 are of a lifting structure. The first tensioning roller 46 can be lifted and lowered along with the lower cross beam A25 to change the height of the first tensioning roller 46 and adjust the tensioning effect of the degradable winding film.

[0034] Air can be supplied into the main air distribution pipe 47 through the fan B50 via the first air filter 15, the sub-valve B12, the connecting elbow A7, the vertical air pipe A6, the pipe joint A16, the telescopic pipe A18, and the main air distribution joint A22. The first air cooling mechanism evenly distributes air through the main air distribution pipe 47 to cool the surface of the degradable winding film. Moreover, the hot air after heat exchange will be effectively recovered through the main gas collection pipe 48. The hot gas recovered by the main gas collection pipe 48 enters the heat collection box 5 through the main gas collection joint B23, the telescopic pipe B19, the pipe joint B17, the vertical air pipe B8, the connecting elbow B9, the external air pipe B13, the sub-valve C14, and the fan A49. The fan A49 provides the power for air outlet.

[0035] Further, the second frame includes vertical air pipes C26 and D28 that are parallel to each other. The tops of the vertical air pipes C26 and D28 are respectively connected with connecting elbows C27 and D29. The other ends of the connecting elbows C27 and D29 are respectively connected to both ends of the main valve D30. An external air pipe C31 is connected to the bypass interface of the connecting elbow C27. The other end of the external air pipe C31 is connected with a sub-valve E32. A second air filter 35 is installed at the air inlet of the sub-valve E32. An external air pipe D33 is connected to the bypass interface of the connecting elbow D29. A sub-valve F34 is installed on the external air pipe D33. A pipe joint C36 is installed at the bottom end of the vertical air pipe C26. A telescopic pipe C38 is connected to the pipe joint C36. The other end of the telescopic pipe C38 is connected with a main air distribution joint C42. A pipe joint D37 is installed at the bottom end of the vertical air pipe D28. A telescopic pipe D39 is connected to the pipe joint D37. The other end of the telescopic pipe D39 is connected with a main air collection joint D43. An upper cross beam B44 is installed between the pipe joint D37 and the telescopic pipe C38. A lower cross beam B45 is installed between the main air distribution joint C42 and the main air collection joint D43. A third lifting cylinder 40 is installed between the pipe joint C36 and the main air distribution joint C42. A fourth lifting cylinder 41 is installed between the pipe joint D37 and the main air collection joint D43. The other end of the upper layer reversing roller B2 is rotatably installed on the upper cross beam B44. The other end of the first tensioning roller 46 is rotatably installed on the lower cross beam B45. A main air distribution pipe 47 is installed between the main air distribution joint A22 and the main air distribution joint C42. A main air collection pipe 48 is installed between the main air collection joint B23 and the main air collection joint D43.

[0036] Further, referring to Figure 3 , multiple air outlet nozzles are arranged on one side of the main air distribution pipe 47, and multiple air inlet nozzles are arranged on one side of the main air collection pipe 48. The gas flow path is optimized to improve the cooling effect.

[0037] Further, return air branch pipes are respectively connected to the sub-valve C14 and the sub-valve F34. The two return air branch pipes merge and are connected to the heat collection box 5. A fan A49 is installed on the main pipe after the merger of the return air branch pipes. The air inlets of the first air filter 15 and the second air filter 35 are both connected to the air outlet of a fan B50. The fan A49 and the fan B50 are the power sources for air supply and return air.

[0038] Further, the second air cooling mechanism includes direct blowing cooling fans 51. Multiple groups of direct blowing cooling fans 51 are provided and all face the degradable winding film.

[0039] Further, the first lifting cylinder 20, the second lifting cylinder 21, the third lifting cylinder 40, and the fourth lifting cylinder 41 move synchronously.

[0040] Further, the upper layer reversing roller B2 is directly above the first tensioning roller 46, and the distance between the upper layer reversing roller B2 and the first tensioning roller 46 is adjustable.

[0041] Further, reinforcing rib plates are provided between the upper cross beam A24 and the pipe joint A16, and between the upper cross beam A24 and the pipe joint B17.

[0042] In the film cooling and waste heat utilization system of the degradable winding film production line of the present invention, the to-be-processed coil needs to be preheated by the heat collection box first and then compounded. This application can use the first air cooling mechanism and the second air cooling mechanism to cool the surface of the compounded degradable winding film. At the same time, the waste heat recovered by the first air cooling mechanism can preheat the to-be-processed coil through the heat collection box, realizing the recovery and utilization of heat and improving the compounding effect of the degradable winding film.

[0043] In the film cooling and waste heat utilization system of the degradable winding film production line of the present invention, the first air cooling mechanism evenly distributes air through the air distribution main pipe to cool the surface of the degradable winding film, and the hot air after heat exchange will be effectively recovered through the air collection main pipe, thereby improving the cooling efficiency of the degradable winding film.

[0044] In the film cooling and waste heat utilization system of the degradable winding film production line of the present invention, the degradable winding film bypasses the first tensioning roller and the upper layer reversing roller B. The air distribution main pipe joint A and the air collection main pipe joint B are lifting structures, and the first tensioning roller can be lifted and lowered with the lower cross beam A to change the height of the first tensioning roller and adjust the tensioning effect of the degradable winding film.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

[0046] Where the present invention is not described in detail, it is all well-known technology to those skilled in the art of this technology field.

Claims

1. A film cooling and waste heat utilization system in a degradable winding film production line, comprising a lower layer reversing roller A, an upper layer reversing roller B, an upper layer reversing roller C, and a lower layer reversing roller D. The degradable winding film to be cooled bypasses through the lower layer reversing roller A, the upper layer reversing roller B, the upper layer reversing roller C, and the lower layer reversing roller D in sequence. It is characterized in that: The lower layer reversing rollers A and D are at the same height. The heights of the upper layer reversing rollers B and C are higher than the horizontal plane where the lower layer reversing roller A is located. A first air cooling mechanism is provided on one side of the upper layer reversing roller B, and a second air cooling mechanism is provided on one side of the upper layer reversing roller C. The first air cooling mechanism is connected to a heat collecting box body at the back. An inlet belt opening and an outlet belt opening are respectively provided at both ends of the heat collecting box body, and an air inlet interface is provided at the top of the heat collecting box body.

2. The film cooling and waste heat utilization system in the degradable winding film production line according to claim 1, wherein, The first air cooling mechanism includes a first frame and a second frame which are arranged at intervals. The bottom of the first frame and the second frame are installed with a gas distribution main pipe and a gas collecting main pipe which are arranged at intervals. The upper layer reversing roller B is also installed between the first frame and the second frame.

3. The film cooling and waste heat utilization system in the degradable winding film production line according to claim 2, characterized in that, The first frame includes a vertical air pipe A and a vertical air pipe B which are parallel to each other. The tops of the vertical air pipe A and the vertical air pipe B are respectively connected with a connecting elbow A and a connecting elbow B. The other ends of the connecting elbow A and the connecting elbow B are respectively connected with both ends of the main valve A. An external air pipe A is connected to the bypass interface of the connecting elbow A. The other end of the external air pipe A is connected with a sub-valve B. A first air filter is installed on the air inlet of the sub-valve B. An external air pipe B is connected to the bypass interface of the connecting elbow B. A sub-valve C is installed on the external air pipe B. A pipe joint A is installed at the bottom end of the vertical air pipe A. A telescopic pipe A is connected to the pipe joint A. The other end of the telescopic pipe A is connected with a gas distribution main pipe joint A. A pipe joint B is installed at the bottom end of the vertical air pipe B. A telescopic pipe B is connected to the pipe joint B. The other end of the telescopic pipe B is connected with a gas collecting main pipe joint B. An upper cross beam A is installed between the pipe joint A and the pipe joint B. A lower cross beam A is installed between the gas distribution main pipe joint A and the gas collecting main pipe joint B. A first lifting cylinder is installed between the pipe joint A and the gas distribution main pipe joint A. A second lifting cylinder is installed between the pipe joint B and the gas collecting main pipe joint B. One end of the upper layer reversing roller B is rotatably installed on the upper cross beam B. A first tensioning roller is rotatably installed on the lower cross beam A.

4. The film cooling and waste heat utilization system in the degradable winding film production line according to claim 3, wherein, The second frame includes vertical air pipes C and D that are parallel to each other. The tops of the vertical air pipes C and D are respectively connected with connecting elbows C and D. The other ends of the connecting elbows C and D are respectively connected to both ends of the main valve D. An external air pipe C is connected to the bypass interface of the connecting elbow C. The other end of the external air pipe C is connected with a sub-valve E. A second air filter is installed at the air inlet of the sub-valve E. An external air pipe D is connected to the bypass interface of the connecting elbow D. A sub-valve F is installed on the external air pipe D. A pipe joint C is installed at the bottom end of the vertical air pipe C. A telescopic pipe C is connected to the pipe joint C. The other end of the telescopic pipe C is connected with a main air distribution pipe joint C. A pipe joint D is installed at the bottom end of the vertical air pipe D. A telescopic pipe D is connected to the pipe joint D. The other end of the telescopic pipe D is connected with a main air collection pipe joint D. An upper cross beam B is installed between the pipe joint D and the telescopic pipe C. A lower cross beam B is installed between the main air distribution pipe joint C and the main air collection pipe joint D. A third lifting cylinder is installed between the pipe joint C and the main air distribution pipe joint C. A fourth lifting cylinder is installed between the pipe joint D and the main air collection pipe joint D. The other end of the upper layer reversing roller B is rotatably installed on the upper cross beam B. The other end of the first tensioning roller is rotatably installed on the lower cross beam B. A main air distribution pipe is installed between the main air distribution pipe joint A and the main air distribution pipe joint C. A main air collection pipe is installed between the main air collection pipe joint B and the main air collection pipe joint D.

5. The film cooling and waste heat utilization system in the degradable winding film production line according to claim 4, characterized in that, Multiple groups of air outlet nozzles are arranged on one side of the main air distribution pipe, and multiple groups of air inlet nozzles are arranged on one side of the main air collection pipe.

6. The film cooling and waste heat utilization system in the degradable winding film production line according to claim 5, characterized in that, Return air branch pipes are respectively connected to the sub-valve C and the sub-valve F. After the two groups of return air branch pipes merge, they are connected to the heat collection box body. A fan A is installed on the main pipe after the merge of the return air branch pipes. The air inlets of the first air filter and the second air filter are both connected to the air outlet of the fan B. The fan A and the fan B are the power sources for air supply and return air.

7. The film cooling and waste heat utilization system in the degradable winding film production line according to any one of claims 1-6, characterized in that The second air cooling mechanism includes direct blowing cooling fans. There are multiple groups of direct blowing cooling fans, and all of them are directed towards the degradable winding film.

8. The film cooling and waste heat utilization system in the degradable winding film production line according to claim 7, characterized in that, The first lifting cylinder, the second lifting cylinder, the third lifting cylinder, and the fourth lifting cylinder move synchronously.

9. The film cooling and waste heat utilization system in the degradable winding film production line according to claim 8, characterized in that, The upper layer reversing roller B is directly above the first tensioning roller, and the distance between the upper layer reversing roller B and the first tensioning roller is adjustable.

10. The film cooling and waste heat utilization system in the degradable winding film production line according to claim 9, characterized in that, Reinforcing rib plates are arranged between the upper cross beam A and the pipe joint A, and between the upper cross beam A and the pipe joint B.

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