A waste heat recovery device and recovery method for a stenter setting machine

Abstract

The present invention belongs to the technical field of stenter setting, and in particular relates to a waste heat recovery device for a stenter setting machine and a recovery method thereof, which comprises a shell, a first motor, a first guide roller, a second guide roller, a third guide roller, a first support roller, a fourth guide roller, and a fifth guide roller. The present invention installs a guide shell extending outward and obliquely downward at the upper end of the stenter inlet, so that the gas in the upper cavity of the middle layer plate can flow obliquely downward to the stenter inlet; the guide shell and the stenter are used to pull the gas flowing to the stenter inlet inward during the process of being pulled in, and a counterclockwise vortex is formed at the stenter inlet; on the one hand, the hot air flowing from the upper cavity of the middle layer plate to the stenter inlet is recovered, thereby reducing the loss of heat at the stenter inlet; on the other hand, such a design can block the entry of external cold air.

Description

Technical Field

[0001] The present invention belongs to the technical field of stentering and setting, and in particular relates to a stentering and setting machine waste heat recovery device and a recovery method thereof. Background Art

[0002] The stentering machine generates a large amount of heat when in use, and the heat from the stentering is often dissipated into the air, resulting in energy waste; Patent CN217303694U discloses a device for recovering the stentering heat, but does not disclose waste heat recovery technology for effectively utilizing the internal energy of the stenter.

[0003] There is usually hot air in the setting machine. The hot air heats the entire cavity and sets the tenter. The patterns and text on the tenter will also be dried. There is a large amount of water vapor in the internal hot air, so the internal hot air will inevitably circulate. After circulation, it must be discharged from the cavity. This part of the discharged hot air also carries a lot of heat, which will often be lost to the air. The heat can also be connected to heat recovery equipment, but there will inevitably be losses in external equipment.

[0004] In addition, stretching in will bring in cold air, and pulling out will bring out hot air, which will cause heat loss. There is currently no relevant technology to solve this problem.

[0005] The present invention designs a stenter setting machine waste heat recovery device and a recovery method thereof to solve the above problems. Summary of the Invention

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The cam is secured to the chassis and has a first end, the second end, the second end, the third end, and the fifth end, and the cam is secured to the chassis and has a first end, the second end, the third end, and the fifth end, and the cam is secured to the chassis and has a first end, the second end, the third end, and the fifth end, and the cam is secured to the chassis and has a first end, the second end, the third end, and the fifth end, and the fifth end, and the

[0008] A plurality of heaters are fixedly mounted on the upper side of the bottom plate of the shell.

[0009] A sealing shell is fixedly installed on the front side of the shell. The inner wall surface of the front end of the sealing shell is an arc surface and faces the stenter outlet. A transmission belt is installed in the sealing shell.

[0010] Two heat exchangers are fixedly installed on the upper side of the intermediate plate, and an air inlet is fixedly installed on one end of the heat exchanger passing through the intermediate plate downward; exhaust ports are installed at both ends of the heat exchanger, and the exhaust ports pass through the side wall of the shell and communicate with the outside world; an air cavity is opened inside the heat exchanger, and a heat exchange cavity is provided between the outer walls of adjacent air cavities on the heat exchanger, and the heat exchange cavity is communicated with the upper cavity of the intermediate plate; an air pump is fixedly installed on the upper side of the intermediate plate.

[0011] As a preferred solution, the top of the shell is provided with a plurality of air vents, and an air vent valve is installed at each air vent.

[0012] As a preferred solution, four rotating shafts are rotatably installed at the stretching outlet, and a conveying roller is fixedly installed on each of the four rotating shafts; a transmission belt is wound between the four conveying rollers; one end of the four rotating shafts passes through one side of the outer shell and is connected to the second sprocket and the second chain transmission; the second motor is fixedly installed on the outer shell, and the output shaft of the second motor is fixedly connected to one of the four rotating shafts.

[0013] As a preferred solution, there is a gap between the upper end of the conveyor belt and the upper end surface of the stenter outlet.

[0014] As a preferred solution, the third guide roller is rotatably mounted at the front end of the shell and close to the stentering inlet, and the fourth guide roller is rotatably mounted in the shell and located on the upper side of the intermediate layer near the rear plate of the shell; two first support rollers are evenly rotatably mounted between the third guide roller and the fourth guide roller, and the two first support rollers are located in the shell and on the upper side of the intermediate layer; the fifth guide roller is rotatably mounted in the shell and located on the lower side of the intermediate layer near the rear plate of the shell; the second guide roller is rotatably mounted at the front end of the shell and close to the stentering outlet, and two second support rollers are evenly rotatably mounted between the second guide roller and the fifth guide roller, and the two second support rollers are located in the shell and on the lower side of the intermediate layer; the second support roller has an annular notch area in the middle; the first guide roller is rotatably mounted at the front end of the shell and located obliquely above the second guide roller; the first guide roller, the second guide roller, the third guide roller, the fourth guide roller, the fifth guide roller, the first support roller and the second support roller are connected by gears, a first sprocket and a first chain; the first motor is fixedly mounted on the shell, and the output shaft of the first motor is fixedly connected to the rotating shaft of the third guide roller.

[0015] As a preferred solution, two detachable baffles distributed up and down are installed on one side of the shell. After the detachable baffles are opened, the tenter can be manually pulled, which is convenient for placing the tenter at the beginning.

[0016] As a preferred solution, the gas pressure in the upper cavity of the intermediate layer plate is 1.03P0, and the gas pressure in the lower cavity of the intermediate layer plate is 1.05P0, where P0 is atmospheric pressure.

[0017] As a preferred solution, the air inlet side of the heat exchanger is higher than the exhaust side.

[0018] As a preferred solution, the outer side of the shell has a heat-insulating layer; the temperature in the upper cavity of the middle layer plate is lower than the temperature in the lower cavity.

[0019] The heat of the exhaust fan is then removed from the heat exchanger and the exhaust fan is removed from the heat exchanger, ...

[0020] 1. The present invention has a guide shell extending outward and obliquely downward at the upper end of the tenter entrance, and a plurality of partition plates are evenly fixedly installed in the guide shell; because the gas pressure in the upper cavity of the middle plate is 1.03P0, which is greater than the atmospheric pressure P0, the gas in the upper cavity of the middle plate will be discharged outward from the tenter entrance. If it is not handled, it will easily cause heat loss. Therefore, the present invention has a guide shell extending outward and obliquely downward at the upper end of the tenter entrance, so that the gas in the upper cavity of the middle plate can flow obliquely downward to the tenter entrance; through the guide shell and the tenter During the process of the web being pulled in, the gas flowing to the stenter inlet is pulled inward, forming a counterclockwise vortex at the stenter inlet; on the one hand, it recovers the hot air flowing from the upper cavity of the middle layer plate to the stenter inlet, reducing the loss of heat at the stenter inlet; on the other hand, such a design can block the entry of external cold air; in order to ensure that the gas in the upper cavity of the middle layer plate flows stably into the stenter inlet, a plurality of dividing plates are evenly fixedly installed in the guide shell in the present invention, and the dividing plates have a stabilizing effect on the gas flowing to the stenter inlet.

[0021] 2. In the present invention, the gas pressure in the cavity on the lower side of the intermediate layer plate is 1.05P0, which is greater than the atmospheric pressure P0. Therefore, the gas in the cavity on the lower side of the intermediate layer plate will be discharged outward from the stenter inlet under the action of pressure and the stretching. The gas discharged outward will directly hit the curved surface on the front end of the sealing shell, flow downward under the guidance of the curved surface, and then flow toward the side of the conveyor belt; and the gas flowing toward the conveyor belt will flow upward along the conveyor belt under the action of the rotating conveyor belt, and be sent back to the cavity on the lower side of the intermediate layer plate by the conveyor belt. In this way, the gas will form a vortex in the sealing shell under the joint action of the sealing shell, the conveyor belt and the outward traction force of the stretching; on the one hand, it can recover the hot air flowing from the cavity on the lower side of the intermediate layer plate to the stenter outlet, thereby reducing the heat loss at the stenter outlet; on the other hand, such a design can block the external cold air from entering from the upper end of the sealing shell, thereby preventing the temperature in the cavity on the upper side of the intermediate layer plate from decreasing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall appearance of the components.

[0023] Figure 2 It is a schematic diagram of the overall component distribution.

[0024] Figure 3 It is a schematic diagram of the internal structure of the shell.

[0025] Figure 4 It is a schematic diagram of the shell structure.

[0026] Figure 5 This is a schematic diagram of the stenter entrance structure.

[0027] Figure 6 This is a schematic diagram of the distribution of stenter entrances.

[0028] Figure 7 This is a schematic diagram of the transmission belt distribution.

[0029] Figure 8 This is a schematic diagram of the sealing shell installation.

[0030] Figure 9 This is a schematic diagram of the distribution of removable baffles.

[0031] Figure 10 It is a schematic diagram of the distribution of support rollers and guide rollers.

[0032] Figure 11 It is a schematic diagram of the structure of the second support roller.

[0033] Figure 12 This is a schematic diagram of the conveyor belt installation.

[0034] Figure 13 This is a schematic diagram of the conveyor belt drive.

[0035] Figure 14It is a schematic diagram of the heat exchanger structure.

[0036] Figure 15 This is a schematic diagram of the heat exchanger.

[0037] Figure 16 This is a schematic diagram of the working principle of the stenter inlet.

[0038] The numbers in the figure are as follows: 1. outer shell; 2. air release valve; 3. stretching; 4. first motor; 5. second motor; 6. heater; 7. conveyor belt; 8. heat exchanger; 9. dividing plate; 10. guide shell; 11. stretching inlet; 12. first guide roller; 13. second guide roller; 14. sealing shell; 15. removable baffle; 16. third guide roller; 17. first support roller; 18. fourth guide roller; 19. fifth guide roller; 20. gear; 21. first sprocket; 22. first chain; 23. second support roller; 24. conveying roller; 25. rotating shaft; 26. second sprocket; 27. second chain; 28. air cavity; 29. ​​heat exchange cavity; 30. air inlet; 31. exhaust port; 32. intermediate layer; 33. annular gap area; 34. air pump; 35. stretching outlet. DETAILED DESCRIPTION

[0039] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following embodiments or drawings are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0040] A waste heat recovery device for a stenter 3 setting machine, such as Figure 1 、 2 , 5, 7, and 9, it includes a housing 1, a deflation valve 2, a first motor 4, a second motor 5, a heater 6, a conveyor belt 7, a heat exchanger 8, a first guide roller 12, a second guide roller 13, a sealing shell 14, a removable baffle 15, a third guide roller 16, a second support roller 23, a fourth guide roller 18, and a fifth guide roller 19, wherein Figure 4 As shown, an intermediate plate 32 is fixedly installed in the housing 1, and the intermediate plate 32 divides the interior of the housing 1 into two independent cavities, an upper cavity and a lower cavity; Figure 1 、 2 As shown in FIG3 , the top of the housing 1 has a plurality of air vents, and each air vent is equipped with an air vent valve 2; Figure 5 、 6As shown, the front end of the shell 1 is provided with a tenter inlet 11 and a tenter outlet 3, the tenter inlet 11 is communicated with the cavity on the upper side of the middle plate 32, and the tenter outlet 3 is communicated with the cavity on the lower side of the middle plate 32; the upper end of the tenter inlet 11 is obliquely extended outward and downward to be installed with a guide shell 10, and a plurality of partition plates 9 are evenly fixedly installed in the guide shell 10; the partition plates 9 divide the interior of the guide shell 10 into a plurality of independent flow channels; a plurality of heaters 6 are fixedly installed on the upper side of the bottom plate of the shell 1; as shown Figure 7 、 8 As shown, a sealing shell 14 is fixedly installed on the front side of the housing 1, and the inner wall surface of the front end of the sealing shell 14 is an arc surface and faces the outlet of the tenter 3; Figure 12 、 13 As shown, four rotating shafts 25 are rotatably installed at the outlet of the tenter 3, and a conveying roller 24 is fixedly installed on each of the four rotating shafts 25; a transmission belt 7 is wound and installed between the four conveying rollers 24; one end of the four rotating shafts 25 passes through one side of the shell 1 and is transmission-connected through a second sprocket 26 and a second chain 27; a second motor 5 is fixedly installed on the shell 1, and an output shaft of the second motor 5 is fixedly connected to one of the four rotating shafts 25; there is a gap between the upper end of the transmission belt 7 and the upper end surface of the outlet of the tenter 3; as shown Figure 1 、 2 As shown in Figures 10 and 10, the third guide roller 16 is rotatably mounted at the front end of the housing 1 and is close to the tenter inlet 11, and the fourth guide roller 18 is rotatably mounted in the housing 1 and is located on the upper side of the intermediate plate 32 close to the rear plate of the housing 1; two first support rollers 17 are evenly rotatably mounted between the third guide roller 16 and the fourth guide roller 18, and the two first support rollers 17 are located in the housing 1 and on the upper side of the intermediate plate 32; the fifth guide roller 19 is rotatably mounted in the housing 1 and is located on the lower side of the intermediate plate 32 close to the rear plate of the housing 1; as shown in Figures 10 and 10, the third guide roller 16 ... upper side of the intermediate plate 32 close to the rear plate of the housing 1; Figure 10 、 11 As shown, the second guide roller 13 is rotatably mounted at the front end of the housing 1 and close to the exit of the tenter 3. Two second support rollers 23 are evenly rotatably mounted between the second guide roller 13 and the fifth guide roller 19. The two second support rollers 23 are located in the housing 1 and on the lower side of the middle layer 32. The middle of the second support roller 23 has an annular notch area 33. The first guide roller 12 is rotatably mounted at the front end of the housing 1 and is located obliquely above the second guide roller 13. Figure 10 、 11 As shown, the first guide roller 12, the second guide roller 13, the third guide roller 16, the fourth guide roller 18, the fifth guide roller 19, the first support roller 17 and the second support roller 23 are connected through the gear 20, the first sprocket 21 and the first chain 22; the first motor 4 is fixedly mounted on the housing 1, and the output shaft of the first motor 4 is fixedly connected to the rotating shaft 25 of the third guide roller 16; Figure 1 、2 As shown, during processing, the tenter 3 will pass through the third guide roller 16 and enter from the tenter entrance 11, and then pass through the upper side of the two first support rollers 17 and the fourth guide roller 18 in sequence, and then pass through the middle support plate downward, and after passing through the middle support plate, pass through the fifth guide roller 19 and the upper side of the two second support rollers 23, and then pass out from the tenter 3 outlet. The tenter 3 that has passed through the outlet passes through the second guide roller 13 and the first guide roller 12 and is pulled outward; two detachable baffles 15 distributed up and down are installed on one side of the shell 1, and the detachable baffles 15 can be manually pulled when they are opened, so that the tenter 3 can be put in at the beginning.

[0041] When the tenter 3 of the present invention enters the shell 1, the upper surface of the tenter 3 is the side with words, and the contact surface between the tenter 3 and the third guide roller 16, the first support roller 17, the fourth support roller and the fifth guide roller 19 is the back side without words. In order to better guide and support the tenter 3, the third guide roller 16, the first support roller 17, the fourth support roller and the fifth guide roller 19 are all rollers without notches; and after the tenter 3 moves to the lower side, the side with words on the tenter 3 will face downward. In order to support the lower side tenter 3 without damaging the words on the tenter 3, the present invention opens an annular notch area 33 on the second support, and the annular notch area 33 is located in the middle of the second support roller 23 opposite to the area with words on the tenter 3, while the two sides of the second support roller 23 still maintain contact with the tenter 3. The second support roller 23 designed in this way can support the tenter 3 without damaging the words on the tenter 3; similarly, the first guide roller 12 that cooperates with the side with words on the tenter 3 also adopts this method.

[0042] In the present invention, the gas pressure in the upper cavity of the intermediate layer plate 32 is 1.03P0, where P0 is atmospheric pressure. In order to ensure that the gas pressure in the upper cavity of the intermediate layer plate 32 is maintained at 1.03P0, the present invention provides multiple vents at the upper end of the outer shell 1, and a vent valve 2 is installed at the vent. The gas pressure in the upper cavity of the intermediate layer plate 32 is controlled by controlling the switch of the vent valve 2. Although the vent is provided in the present invention, because the gas pressure change in the upper cavity of the intermediate layer plate 32 is relatively small, the gas discharged through the vent is also relatively small, so it will not cause a large loss of heat.

[0043] like Figure 16As shown, the present invention is provided with a guide shell 10 extending obliquely outward and downward at the upper end of the tenter entrance 11, and a plurality of partition plates 9 are evenly fixedly installed in the guide shell 10; because the gas pressure in the upper cavity of the intermediate plate 32 is 1.03P0, which is greater than the atmospheric pressure P0, the gas in the upper cavity of the intermediate plate 32 will be discharged outward from the tenter entrance 11, and it is easy to cause heat loss if it is not handled, so the present invention is provided with a guide shell 10 extending obliquely outward and downward at the upper end of the tenter entrance 11, so that the gas in the upper cavity of the intermediate plate 32 can flow obliquely downward to the tenter entrance 11; through the guide shell 10 and the tenter 3 during the process of being pulled in The friction force of its upper surface pulls the gas flowing to the stretch inlet 11 inward, forming a counterclockwise vortex at the stretch inlet 11; on the one hand, it recovers the hot air flowing from the upper cavity of the middle layer plate 32 to the stretch inlet 11, reducing the loss of heat at the stretch inlet 11; on the other hand, such a design can block the entry of external cold air, preventing the temperature in the upper cavity of the middle layer plate 32 from decreasing; in order to ensure that the gas in the upper cavity of the middle layer plate 32 flows stably into the stretch inlet 11 in the present invention, a plurality of dividing plates 9 are evenly fixedly installed in the guide shell 10, and the dividing plates 9 have a flow stabilizing effect on the gas flowing to the stretch inlet 11.

[0044] The outer side of the housing 1 of the present invention has a heat-insulating layer.

[0045] In the present invention, the temperature in the upper cavity of the intermediate plate 32 is lower than the temperature in the lower cavity. The tentering 3 is pre-treated in the upper cavity of the intermediate plate 32 and is formally treated in the lower cavity of the intermediate plate 32 .

[0046] In the present invention, there are gaps at the tenter inlet 11 of the housing 1, the tenter outlet 3, and the positions where the intermediate layer 32 and the inscribed surface of the tenter 3 match, so as to prevent the inscribed area on the tenter 3 from being damaged.

[0047] The present invention installs a conveyor belt 7 at the outlet of the tenter 3. There is a gap between the conveyor belt 7 and the tenter 3 to ensure that the conveyor belt 7 and the tenter 3 do not contact each other, thereby preventing the words on the tenter 3 from being damaged by the vibration of the conveyor belt 7. There is also a gap between the sealing shell 14 and the tenter 3. The outlet of the upper end of the sealing shell 14 is higher than the outlet of the tenter 3. Figure 8As shown, the gas pressure in the lower cavity of the intermediate layer plate 32 in the present invention is 1.05P0, which is greater than the atmospheric pressure P0. Therefore, the gas in the lower cavity of the intermediate layer plate 32 will be discharged outward from the stenter inlet 11 under the action of pressure and the drive of the stenter 3, and the gas discharged outward will directly hit the front curved surface of the sealing shell 14, and will flow downward under the guidance of the curved surface, and then flow toward the side of the conveyor belt 7; and the gas flowing toward the conveyor belt 7 will flow upward along the conveyor belt 7 under the action of the rotating conveyor belt 7, and will be sent back to the cavity on the lower side of the intermediate layer plate 32 by the conveyor belt 7. In this way, under the joint action of the sealing shell 14, the conveyor belt 7 and the outward traction force of the stenter 3, the gas will form a vortex in the sealing shell 14; on the one hand, it plays a role in recovering the hot air flowing from the lower cavity of the intermediate layer plate 32 to the outlet of the stenter 3, thereby reducing the heat loss at the outlet of the stenter 3; on the other hand, such a design can block the external cold air from entering from the upper end of the sealing shell 14, thereby preventing the temperature in the upper cavity of the intermediate layer plate 32 from decreasing.

[0048] The heater 6 mainly heats the cavity on the lower side of the intermediate layer plate 32 by radiation, and also adds a small amount of hot air to make the gas inside the shell 1 flow and have the ability to absorb water.

[0049] like Figure 1 、 2 As shown in FIG3 , two heat exchangers 8 are fixedly mounted on the upper side of the intermediate plate 32, and an air inlet 30 is fixedly mounted on one end of the heat exchanger 8 downwardly through the intermediate plate 32; exhaust ports 31 are mounted on both ends of the heat exchanger 8, and the exhaust ports 31 pass through the side wall of the housing 1 and communicate with the outside world; Figure 14 、 15 As shown, an air cavity 28 is opened inside the heat exchanger 8, and a heat exchange cavity 29 is provided between the outer walls of adjacent air cavities 28 on the heat exchanger 8. The heat exchange cavity 29 is communicated with the upper cavity of the intermediate layer plate 32; an air pump 34 is fixedly installed on the upper side of the intermediate layer plate 32.

[0050] The air pump 34 provides the gas in the upper cavity of the middle plate 32 with the power to flow.

[0051] In the present invention, the side of the air inlet 30 of the heat exchanger 8 is higher than the side of the exhaust port 31. After the gas on the lower side of the intermediate layer plate 32 enters the heat exchanger 8 from the air inlet 30, it will flow along the heat exchanger 8 to the side of the exhaust port 31, and exchange heat with the gas in the cavity on the upper side of the intermediate layer plate 32 during the flow; then the gas after heat exchange is discharged from the exhaust port 31; the reason why the side of the air inlet 30 of the heat exchanger 8 of the present invention is higher than the side of the exhaust port 31 is because the gas pressure in the outer shell 1 is relatively small. In order to ensure that the gas can flow smoothly through the heat exchanger 8, the side of the air inlet 30 of the heat exchanger 8 is designed to be higher than the side of the exhaust port 31.

[0052] A method for recovering waste heat from a stenter 3 setting machine, wherein the gas at the stenter inlet 11 can flow obliquely downward to the stenter inlet 11; during the process of being pulled in by the guide shell 10 and the stenter 3, the friction force on the upper surface of the guide shell 10 and the stenter 3 plays an inward pulling role to the gas at the stenter inlet 11; the gas at the stenter 3 outlet is discharged outward from the stenter inlet 11 under the action of pressure and the drive of the stenter 3, and the discharged gas is directly shot onto the front end curved surface of the sealing shell 14, and under the guidance of the curved surface, it flows downward and then toward the conveyor belt 7 The heat exchanger 8 of the intermediate layer 32 is connected to the heat exchanger 8 through the heat inlet 30, and the heated gas flows along the heat exchanger 8 to the exhaust port 31. During the flow, the heated gas exchanges heat with the gas in the cavity above the intermediate layer 32. The heated gas is then discharged from the exhaust port 31, and the heat of the gas in the cavity below the intermediate layer 32 can be fully utilized.

[0053] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the scope of protection of the present invention.

[0054] Implementation method: When using the equipment designed in the present invention, first open the removable baffle 15 before use, and then manually pull the stretcher 3 so that the front end of the stretcher 3 is smoothly wound around all the guide rollers and support rollers; the stretcher 3 wound around the guide rollers and support rollers in this process is an extra stretcher 3 section without words specially prepared for the initial winding of the stretcher 3; then control the heater 6 to work so that the heater 6 heats the cavity on the lower side of the intermediate layer 32 by radiation; the heated gas on the lower side of the intermediate layer 32 will enter the heat exchanger 8 from the air inlet 30 and will flow along the heat exchanger 8 to the exhaust port 31 side, and exchange heat with the gas in the cavity on the upper side of the intermediate layer 32 during the flow; then the gas after heat exchange is discharged from the exhaust port 31; in this process, the gas in the cavity on the upper side of the intermediate layer 32 is also heated and the air pressure in the cavity on the lower side of the intermediate layer 32 is controlled to be 1.05P0, and the air pressure on the upper side of the intermediate layer 32 is controlled to be 1.03P0.

[0055] Then the first motor 4 and the second motor 5 are controlled to work. The work of the first motor 4 will drive all the guide rollers and support rollers to rotate, and the rotation of the guide rollers and support rollers will drive the stretching 3 to move; the work of the second motor 5 will drive the conveyor belt 7 to move; because the gas pressure in the upper cavity of the intermediate layer 32 is 1.03P0, which is greater than the atmospheric pressure P0, the gas in the upper cavity of the intermediate layer 32 will be discharged outward from the stretching inlet 11. During this process, the gas can flow obliquely downward to the stretching inlet 11; during the process of being pulled in by the guide shell 10 and the stretching 3, the friction force of the upper surface thereof pulls the gas flowing to the stretching inlet 11 inward, forming a counterclockwise vortex at the stretching inlet 11; on the one hand, it recovers the hot air flowing from the upper cavity of the intermediate layer 32 to the stretching inlet 11, thereby reducing the heat loss at the stretching inlet 11; on the other hand, such a design can block the entry of external cold air, thereby preventing the temperature in the upper cavity of the intermediate layer 32 from decreasing; and Because the gas pressure in the cavity under the intermediate layer plate 32 is 1.05P0, which is greater than the atmospheric pressure P0, the gas in the cavity under the intermediate layer plate 32 will be discharged outward from the stenter inlet 11 under the action of pressure and the drive of the stenter 3, and the gas discharged outward will directly hit the curved surface on the front end of the sealing shell 14, and will flow downward under the guidance of the curved surface, and then flow toward the side of the conveyor belt 7; and the gas flowing toward the conveyor belt 7 will flow upward along the conveyor belt 7 under the action of the rotating conveyor belt 7, and will be sent back to the cavity under the intermediate layer plate 32 by the conveyor belt 7. In this way, under the joint action of the sealing shell 14, the conveyor belt 7 and the outward traction force of the stenter 3, the gas will form a vortex in the sealing shell 14; on the one hand, it can recover the hot air flowing from the cavity under the intermediate layer plate 32 to the outlet of the stenter 3, thereby reducing the heat loss at the outlet of the stenter 3; on the other hand, such a design can block the external cold air from entering from the upper end of the sealing shell 14, thereby preventing the temperature in the cavity above the intermediate layer plate 32 from decreasing.

Claims

1. A waste heat recovery device for a stenter setting machine, comprising a housing, a first motor, a first guide roller, a second guide roller, a third guide roller, a first support roller, a fourth guide roller, and a fifth guide roller, wherein the first guide roller, the second guide roller, the third guide roller, the first support roller, the fourth guide roller, the fifth guide roller, and the second support roller are rotatably mounted on the housing, the first guide roller, the second guide roller, and the third guide roller are located outside the housing, and the first support roller, the fourth guide roller, the fifth guide roller, and the second support roller are located inside the housing; characterized in that: An intermediate layer is fixedly installed in the shell, and the intermediate layer divides the interior of the shell into two independent cavities, an upper and a lower cavities; a tentering inlet and a tentering outlet are opened at the front end of the shell, the tentering inlet is communicated with the cavity on the upper side of the intermediate layer, and the tentering outlet is communicated with the cavity on the lower side of the intermediate layer; a guide shell is installed at the upper end of the tentering inlet, which extends outward and obliquely downward, and a plurality of dividing plates are evenly fixedly installed in the guide shell; A plurality of heaters are fixedly mounted on the upper side of the bottom plate of the housing; A sealing shell is fixedly installed on the front side of the shell, and the inner wall surface of the front end of the sealing shell is an arc surface and faces the stenter outlet; a conveyor belt is installed in the sealing shell; Two heat exchangers are fixedly mounted on the upper side of the intermediate plate, with an air inlet fixedly mounted on one end of the heat exchanger passing downward through the intermediate plate; exhaust ports are mounted on both ends of the heat exchanger, which pass through the side wall of the shell and communicate with the outside; an air cavity is opened inside the heat exchanger, and a heat exchange cavity is formed between the outer walls of adjacent air cavities on the heat exchanger, which communicates with the cavity on the upper side of the intermediate plate; an air pump is fixedly mounted on the upper side of the intermediate plate; Four rotating shafts are rotatably mounted at the tenter outlet, and a conveying roller is fixedly mounted on each of the four rotating shafts; a transmission belt is wound between the four conveying rollers; one end of the four rotating shafts passes through one side of the housing and is connected to the second sprocket and the second chain through a transmission; a second motor is fixedly mounted on the housing, and an output shaft of the second motor is fixedly connected to one of the four rotating shafts; The gas pressure in the upper cavity of the intermediate plate is 1.03P0, and the gas pressure in the lower cavity of the intermediate plate is 1.05P0, where P0 is atmospheric pressure; The outer side of the shell is provided with a heat-insulating layer; the temperature in the upper cavity of the middle layer plate is lower than the temperature in the lower cavity.

2. The waste heat recovery device for a stenter setting machine according to claim 1, characterized in that: The top of the shell is provided with a plurality of air release ports, and each air release port is provided with an air release valve.

3. The waste heat recovery device for a stenter setting machine according to claim 1, characterized in that: There is a gap between the upper end of the conveying belt and the upper end surface of the tenter outlet.

4. The waste heat recovery device for a stenter setting machine according to claim 1, characterized in that: The third guide roller is rotatably mounted at the front end of the shell and is close to the tentering entrance. The fourth guide roller is rotatably mounted in the shell and is located on the upper side of the middle layer close to the rear plate of the shell. Two first support rollers are evenly rotatably mounted between the third guide roller and the fourth guide roller. The two first support rollers are located in the shell and on the upper side of the middle layer. The fifth guide roller is rotatably mounted in the shell and is located on the lower side of the middle layer close to the rear plate of the shell. The second guide roller is rotatably installed at the front end of the shell and close to the stretching outlet, and two second support rollers are evenly rotatably installed between the second guide roller and the fifth guide roller, and the two second support rollers are located in the shell and on the lower side of the middle layer; there is an annular notch area in the middle of the second support roller; the first guide roller is rotatably installed at the front end of the shell and is located obliquely above the second guide roller; the first guide roller, the second guide roller, the third guide roller, the fourth guide roller, the fifth guide roller, the first support roller and the second support roller are connected by gears, a first sprocket and a first chain; the first motor is fixedly installed on the shell, and the output shaft of the first motor is fixedly connected to the rotating shaft of the third guide roller.

5. The waste heat recovery device for a stenter setting machine according to claim 1, characterized in that: Two detachable baffles distributed up and down are installed on one side of the shell, and the detachable baffles can be manually pulled and stretched after being opened.

6. The waste heat recovery device for a stenter setting machine according to claim 1, characterized in that: The air inlet side of the heat exchanger is higher than the air outlet side.

7. The method for recovering waste heat from a waste heat recovery device of a stenter setting machine according to claim 1, characterized in that: The gas at the tenter inlet can flow obliquely downward to the tenter inlet; during the process of being pulled in by the guide shell and the tenter, the friction on the upper surface of the guide shell and the tenter pulls the gas to the tenter inlet inward; the gas at the tenter outlet is discharged outward from the tenter inlet under the action of pressure and the drive of the tenter, and the discharged gas is directly shot onto the curved surface at the front end of the sealing shell, and under the guidance of the curved surface, it flows downward and then flows toward the side of the conveyor belt; The gas flowing toward the conveyor belt will flow upward along the conveyor belt under the action of the rotating conveyor belt and will be sent back to the cavity on the lower side of the middle layer plate by the conveyor belt; the heated gas on the lower side of the middle layer plate will enter the heat exchanger from the air inlet and flow along the heat exchanger toward the exhaust port, exchanging heat with the gas in the cavity on the upper side of the middle layer plate during the flow; the gas after heat exchange will then be discharged from the exhaust port, and the heat of the gas in the cavity on the lower side of the middle layer plate can be fully utilized.

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