Multi-stage waste heat recovery circulating system of non-woven fabric drying machine

Abstract

The utility model relates to the heat energy recovery technical field among non - woven fabric production equipment, disclose a kind of non - woven fabric dryer multistage waste heat recovery circulation system, including drying shell and two mounting blocks, the top of right side mounting block is provided with air inlet heating mechanism, the top rear side left end of right side mounting block is provided with temperature control mechanism, the temperature control mechanism is used to improve the temperature inside, the rear side of drying shell is provided with wind force circulation mechanism, the wind force circulation mechanism is used to circulate internal hot air, the top of left side mounting block is provided with air outlet circulation mechanism.In the utility model, after heating air by heater, hot air enters through connecting pipe into air pass board, and non - woven fabric is dried by sending into drying shell from air inlet pipe, heat is transferred to fresh air by heat exchange, energy consumption is reduced while maintaining drying temperature uniformity, reduce energy waste and improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of heat energy recovery technology in nonwoven fabric production equipment, and in particular to a multi-stage waste heat recovery and circulation system for a nonwoven fabric dryer. Background Technology

[0002] In the production of nonwoven fabrics, the drying process is the most energy-intensive. Traditional dryers usually use single-stage heat exchangers or direct exhaust gas to process heat energy, resulting in a large amount of waste heat not being effectively utilized. With the increasing environmental protection requirements and rising energy costs, the industry has begun to explore heat recovery technology. However, most solutions are still limited to heat recovery in a single stage and fail to achieve multi-stage synergistic utilization. Single-stage heat exchangers recover waste heat from exhaust gas for preheating the intake air, resulting in limited recovery efficiency.

[0003] A search revealed Chinese patent publication number CN220911906U, which discloses a textile fabric dryer. The dryer includes a support plate, a processing box fixedly mounted on the top of the support plate, a protective roller movably connected to the surface of the processing box, a small electric push rod fixedly mounted on the inner wall of the processing box, a scraper fixedly connected to one end of the small electric push rod, and fixed rods fixedly mounted on both sides of the support plate, with a drying chamber fixedly connected to one end of each fixed rod. The small electric push rod, when activated, drives the scraper to move up and down, adjusting the distance between the two scrapers. After adjustment, the scrapers contact both sides of the textile fabric and compress it. During the winding process, the two scrapers use compression to drain the water from the rolled fabric, thus dehydrating it and facilitating subsequent drying. This improves the drying effect and speed. However, during the drying process after dehydration, the single-stage recovery system cannot cover the heat loss throughout the entire drying process. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a multi-stage waste heat recovery and circulation system for a non-woven fabric dryer, aiming to improve the problem that the single-stage recovery system in the prior art cannot cover the heat loss of the entire drying process.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a multi-stage waste heat recovery and circulation system for a non-woven fabric dryer, comprising a drying shell and two mounting blocks. An air inlet heating mechanism is provided at the top of the right mounting block, and a temperature control mechanism is provided at the rear left end of the top of the right mounting block. The temperature control mechanism is used to increase the internal temperature. A wind circulation mechanism is provided at the rear of the drying shell, and the wind circulation mechanism is used to circulate the internal hot air. An air outlet circulation mechanism is provided at the top of the left mounting block, and an air outlet mechanism is provided on the left side of the air outlet circulation mechanism. A sliding mechanism is provided at the top of the drying shell, and a sliding fixing mechanism is provided inside the drying shell. The air inlet heating mechanism includes a heater, the bottom of which is fixedly connected to the top of the right mounting block. A connecting pipe is connected to the left side of the heater. A protective shell is fixedly connected to the top of the left mounting block. The left side of the connecting pipe passes through the bottom right side of the protective shell and connects to an air vent. An air inlet pipe is connected to the top right side of the protective shell, and a circulation pipe is connected to the bottom left side of the protective shell.

[0006] Through the above technical solution: outside air enters the protective shell through the air inlet pipe, is heated by the heater, and then enters the air vent plate through the connecting pipe. The hot air is then sent into the drying shell through the circulation pipe to dry the non-woven fabric. During the drying process, the air circulation mechanism at the rear of the drying shell is activated to circulate the internal hot air, allowing it to act on the non-woven fabric multiple times, thus improving drying efficiency. When the temperature inside the drying shell decreases, the temperature control mechanism is activated to regulate the internal temperature and ensure a stable drying environment. The dried, humid air is collected through the exhaust circulation mechanism, where some of the residual heat is recovered and reused, re-entering the drying shell through the circulation pipe to participate in the drying process. The other part is discharged through the exhaust mechanism. The sliding mechanism facilitates the movement of the non-woven fabric within the drying shell, ensuring that the non-woven fabric is heated evenly during the drying process. This achieves efficient drying of the non-woven fabric and multi-stage heat recovery and utilization, effectively improving energy utilization and reducing energy consumption.

[0007] As a further description of the above technical solution:

[0008] The temperature control mechanism includes a controller. The bottom of the controller is fixedly connected to the top rear left end of the right mounting block. A control panel is fixedly connected to the top of the controller. A heating element 1 is connected to the controller. Vertical rods are fixedly connected to the four corners of the heating element 1. A second heating element is fixedly connected to the top of each of the multiple vertical rods.

[0009] Through the above technical solution: the working principle of the temperature control mechanism is to achieve precise control of the equipment temperature through the coordinated operation of components. The operator inputs the temperature setpoint and working mode through the control screen on the top of the controller. After receiving the command, the controller analyzes and processes the temperature parameters, and displays the current temperature and operating status in real time through the control screen. When the temperature is lower than the set value, the controller sends a start signal to the connected heating tube 1. Heating tube 1 efficiently converts electrical energy into heat energy to raise the ambient temperature. The vertical rods connected to the four corners of heating tube 1 provide support, ensuring that heating tube 1 and heating tube 2 fixed at the top of the vertical rod maintain a stable relative position. The two work together to expand the heating area and accelerate the heating speed.

[0010] As a further description of the above technical solution:

[0011] The air circulation mechanism includes two air ducts. The front sides of the two air ducts are fixedly connected to the top rear side of the drying shell. Multiple fixing rings are fixedly connected to the inner side of the two air ducts. Connecting plates are fixedly connected to the inner middle of the two left and two right fixing rings. Horizontal shafts are rotatably connected between the adjacent two left and two right connecting plates. Fan blades are fixedly connected to the outer middle of the two horizontal shafts.

[0012] Through the above technical solution: the two air ducts in the wind circulation mechanism are fixed to the top rear side of the drying shell, and the horizontal shaft drives the fan blades to rotate, causing the hot air inside the drying shell to circulate through the air ducts, accelerating the drying process of the non-woven fabric.

[0013] As a further description of the above technical solution:

[0014] The air circulation mechanism includes a second protective shell. The bottom of the second protective shell is fixedly connected to the top of the left mounting block. An air guide plate is fixedly connected to the middle of the inner side of the second protective shell. An air outlet support assembly is provided at the bottom of the inner side of the second protective shell. A fixing rod is provided at the top of the air outlet support assembly. A rotating shaft is rotatably connected to the top of the fixing rod. A rotating plate is fixedly connected to the outside of the rotating shaft. An air inlet pipe is fixedly connected to the middle of the right side of the second protective shell.

[0015] Through the above technical solution: hot air with residual heat is collected by the air circulation mechanism, and the hot air enters the second protective shell through the air inlet pipe. Under the guidance of the air guide plate, the direction of the air force is adjusted by supporting the air outlet component to circulate the hot air.

[0016] As a further description of the above technical solution:

[0017] The air outlet support assembly includes a support plate, the outer side of which is fixedly connected to the bottom inner side of the protective shell II, and the front side of the support plate is fixedly connected to an air duct.

[0018] Through the above technical solution: the support plate and air passage of the air outlet component flow upward, the rotating shaft drives the rotating plate to rotate, so that the hot air enters the pipe and returns to the equipment, so that the hot air is circulated.

[0019] As a further description of the above technical solution:

[0020] The air outlet mechanism includes an air outlet pipe. The right side of the air outlet pipe is connected to the bottom left side of the second protective shell. A pressure gauge is fixedly connected to the top left side of the air outlet pipe, and a fan is fixedly connected to the inside of the air outlet pipe.

[0021] Through the above technical solution: hot air enters the air outlet duct of the air outlet mechanism, is accelerated and discharged under the action of the fan, the pressure gauge monitors the air pressure in the air outlet duct in real time, and the discharged hot air is transported to the internal places that need heat energy to realize the recovery and utilization of waste heat.

[0022] As a further description of the above technical solution:

[0023] The sliding mechanism includes a cover plate, the bottom of which is slidably connected to the top of the drying shell. Sliding rods are fixedly connected to the left and right sides of the bottom of the cover plate, and pulleys are fixedly connected to the inner sides of the two sliding rods.

[0024] The above technical solution allows the cover plate in the sliding mechanism to slide on the top of the drying shell via a sliding rod and pulley, facilitating the opening and closing of the equipment and making it easier to place and remove non-woven fabrics.

[0025] As a further description of the above technical solution:

[0026] The sliding fixing mechanism includes two support blocks. The bottom of each support block is fixedly connected to the inner bottom of the drying shell. The inner side of each support block is provided with a sliding groove. The top of each support block is provided with multiple connecting blocks. The bottom of each connecting block is fixedly connected with a slider. The slider is slidably connected to the inner side of the two sliding grooves.

[0027] Through the above technical solution: the sliding fixing mechanism can flexibly adjust the position of the components while ensuring the stability and efficiency of the entire drying process. The two support blocks, as the basic support components of the sliding fixing mechanism, provide reliable support for the entire sliding fixing mechanism and can withstand the corresponding pressure and force during the drying process. The inner side of each support block is carefully opened with a sliding groove, which provides a precise track for the sliding of the slider, ensuring that the slider can slide smoothly and stably, avoiding jamming or deviation during the sliding process, and adapting to different drying processes and working scenarios.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, after the air is heated by the heater, the hot air enters the air vent plate through the connecting pipe and is sent into the drying shell from the air inlet pipe to dry the non-woven fabric. The humid and hot air generated during drying is driven by the wind circulation mechanism and flows back to the air vent plate through the circulation pipe. It mixes with the fresh air heated by the heater and participates in drying again. When a portion of it is discharged through the air circulation mechanism and the air outlet mechanism, the heat is transferred to the fresh air through heat exchange, which reduces energy consumption while maintaining the uniformity of drying temperature, reduces energy waste and improves production efficiency.

[0030] 2. In this utility model, through such collaborative operation, the temperature of the drying zone is effectively improved and precisely controlled, meeting the different temperature requirements of nonwoven fabrics at different drying stages, greatly improving drying efficiency and quality. At the same time, the multi-stage waste heat recovery and circulation system can effectively recover and utilize waste heat, reducing energy consumption and achieving the goal of energy saving and efficiency improvement. Attached Figure Description

[0031] Figure 1 This is a perspective view of a multi-stage waste heat recovery and circulation system for a non-woven fabric dryer proposed in this utility model;

[0032] Figure 2 This is a front view of a multi-stage waste heat recovery and circulation system for a nonwoven fabric dryer proposed in this utility model;

[0033] Figure 3 This is a cross-sectional view of the air intake heating mechanism of a multi-stage waste heat recovery circulation system for a nonwoven fabric dryer proposed in this utility model.

[0034] Figure 4 This is a cross-sectional view of the drying shell of a multi-stage waste heat recovery circulation system for a non-woven fabric dryer proposed in this utility model.

[0035] Figure 5 This is a cross-sectional view of the wind circulation mechanism of a multi-stage waste heat recovery and circulation system for a nonwoven fabric dryer proposed in this utility model.

[0036] Figure 6 This is a cross-sectional view of the air circulation mechanism of a multi-stage waste heat recovery and circulation system for a nonwoven fabric dryer proposed in this utility model.

[0037] Legend:

[0038] 1. Drying outer shell; 2. Air intake heating mechanism; 201. Heater; 202. Connecting pipe; 203. Air duct; 204. Protective shell one; 205. Air inlet pipe; 206. Circulation pipe; 3. Temperature control mechanism; 301. Controller; 302. Control panel; 303. Heating element one; 304. Vertical rod; 305. Heating element two; 4. Air circulation mechanism; 401. Air duct; 402. Fixing ring; 403. Connecting plate; 404. Horizontal shaft; 405. Fan blade; 5. Air outlet circulation mechanism; 501. 502. Air guide plate; 503. Support for air outlet assembly; 5031. Support plate; 5032. Air passage groove; 504. Fixing rod; 505. Rotating shaft; 506. Rotating plate; 507. Air inlet pipe; 6. Air outlet mechanism; 601. Air outlet pipe; 602. Pressure gauge; 603. Fan; 7. Sliding mechanism; 701. Cover plate; 702. Sliding rod; 703. Pulley; 8. Sliding fixing mechanism; 801. Support block; 802. Slide groove; 803. Connecting block; 804. Sliding block; 9. Mounting block. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Reference Figure 1 , Figure 3 and Figure 6This utility model provides an embodiment of a multi-stage waste heat recovery and circulation system for a non-woven fabric dryer, including a drying shell 1, which provides a working space for drying non-woven fabric, and two mounting blocks 9 for supporting and mounting components. An air intake heating mechanism 2 is provided on the top of the right mounting block 9 to heat the air entering the drying shell 1. A temperature control mechanism 3 is provided on the left rear end of the top of the right mounting block 9 to regulate and maintain the internal temperature of the drying shell 1. The temperature control mechanism 3 is used to increase the internal temperature. A wind circulation mechanism 4 is provided on the rear side of the drying shell 1 to promote the circulation of hot air inside the drying shell 1 and improve drying efficiency. The wind circulation mechanism 4 includes two air ducts 401 for guiding the flow of hot air. The front sides of the two air ducts 401 are fixedly connected to the top rear side of the drying shell 1. Multiple fixing rings 402 are fixedly connected to the inner sides of the two air ducts 401 for fixing and supporting the connecting plates 403. Connecting plates 403 are fixedly connected to the inner middle of the two left and two right fixing rings 402 for mounting horizontal shafts 404. Horizontal shafts 404 are rotatably connected between adjacent connecting plates 403 on the left and right sides to drive the fan blades 405 to rotate. Fan blades 405 are fixedly connected to the outer middle of the two horizontal shafts 404, which circulate hot air through rotation. An air outlet circulation mechanism 5 is provided on the top of the left mounting block 9 to collect and discharge hot air from the drying shell 1, achieving waste heat recovery. The air circulation mechanism 5 includes a second protective shell 501 for protecting internal components. The bottom of the second protective shell 501 is fixedly connected to the top of the left mounting block 9. A guide plate 502 is fixedly connected to the middle of the inner side of the second protective shell 501 to guide the flow of hot air. A supporting air outlet assembly 503 is provided at the bottom of the inner side of the second protective shell 501 to support and guide the exhaust of hot air. The supporting air outlet assembly 503 includes a support plate 5031 for supporting the air passage 5032 and fixed to the bottom of the inner side of the second protective shell 501. The outer side of the support plate 5031 is fixedly connected to the bottom of the inner side of the second protective shell 501. The front side of the support plate 5031 is fixedly connected to the air passage 5032 for the circulation of hot air. The top of the supporting air outlet assembly 503 is provided with... A fixed rod 504 is used to fix the rotating shaft 505. The top of the fixed rod 504 is rotatably connected to the rotating shaft 505, which drives the rotating plate 506 to rotate. The rotating plate 506 is fixedly connected to the outside of the rotating shaft 505 to adjust the flow direction of hot air as needed. An air inlet pipe 507 is fixedly connected to the middle right side of the second protective shell 501 to introduce hot air into the second protective shell 501. An air outlet mechanism 6 is provided on the left side of the air circulation mechanism 5 to discharge hot air and deliver it to the required location. The air outlet mechanism 6 includes an air outlet pipe 601 for outputting hot air. The right side of the air outlet pipe 601 is connected to the bottom left side of the second protective shell 501. A pressure gauge 602 is fixedly connected to the top left side of the air outlet pipe 601 to monitor the air pressure inside the air outlet pipe 601.A fan 603 is fixedly connected to the inner side of the air outlet duct 601 to accelerate the discharge of hot air. A sliding mechanism 7 is provided on the top of the drying housing 1 to facilitate opening and closing of the drying housing 1. The sliding mechanism 7 includes a cover plate 701, which is used to close the top of the drying housing 1. The bottom of the cover plate 701 is slidably connected to the top of the drying housing 1. Sliding rods 702 are fixedly connected to the left and right sides of the bottom of the cover plate 701 to support and guide the sliding of the cover plate 701. A pulley 703 is fixedly connected to the inner side of each of the two sliding rods 702 to reduce the friction when the cover plate 701 slides. The air intake heating mechanism 2 includes a heater 201 for heating the air intake. Air is heated. The bottom of heater 201 is fixedly connected to the top of the right-side mounting block 9. A connecting pipe 202 is connected to the left side of heater 201 to transport heated air. A protective shell 204 is fixedly connected to the top of the left-side mounting block 9 to protect the internal components. The left side of the connecting pipe 202 passes through the bottom right side of the protective shell 204 and connects to an air vent 203 to evenly distribute the hot air. An air inlet pipe 205 is connected to the top right side of the protective shell 204 to introduce external air. A circulation pipe 206 is connected to the bottom left side of the protective shell 204 to transport the heated air into the drying shell 1.

[0041] Specifically, external air enters the first protective shell 204 through the air inlet pipe 205 and is heated by the heater 201. The hot air is then transported to the drying shell 1 through the connecting pipe 202, the air duct 203, and the circulation pipe 206. The temperature control mechanism 3 regulates and maintains the internal temperature of the drying shell 1 to ensure a stable drying environment. The two air ducts 401 in the air circulation mechanism 4 are fixed to the top rear side of the drying shell 1. The horizontal shaft 404 drives the fan blades 405 to rotate, causing the hot air inside the drying shell 1 to circulate through the air ducts 401, accelerating the drying process of the non-woven fabric. As drying progresses, the hot air with residual heat is collected by the exhaust circulation mechanism 5. The hot air enters the second protective shell 501 through the air inlet pipe 507 and, guided by the air guide plate 502, flows through the supporting exhaust assembly 503. The support plate 5031 and the air duct 5032 flow upwards, and the rotating shaft 505 drives the rotating plate 506 to rotate, flexibly adjusting the direction of hot air flow. The hot air enters the air outlet pipe 601 of the air outlet mechanism 6 and is accelerated out under the action of the fan 603. The pressure gauge 602 monitors the air pressure in the air outlet pipe 601 in real time. The discharged hot air is delivered to the internal places that need heat energy to realize the recovery and utilization of waste heat. The cover plate 701 in the sliding mechanism 7 slides on the top of the drying shell 1 through the sliding rod 702 and the pulley 703, which facilitates the opening and closing of the equipment and the placement and removal of non-woven fabric.

[0042] Reference Figure 2 , Figure 4 and Figure 5The temperature control mechanism 3 includes a controller 301, which can accurately regulate the system temperature parameters. The bottom of the controller 301 is fixedly connected to the top rear left end of the right mounting block 9 to ensure that the controller 301 is installed firmly and is easy to wire. The top of the controller 301 is fixedly connected to a control panel 302, which displays in real time and allows the operator to adjust the temperature setting value and working mode. The controller 301 is connected to a heating tube 303, which can efficiently convert electrical energy into heat energy to increase the ambient temperature. Vertical rods 304 are fixedly connected to the four corners of the heating tube 303 to support and fix the relative position of the heating tube 303 and the heating tube 305. The top of the multiple vertical rods 304 are fixedly connected to the heating tube 305, which works in conjunction with the heating tube 303 to expand the heating area and improve the heating efficiency.

[0043] Specifically, the working principle of the temperature control mechanism 3 is to achieve precise control of the equipment temperature through the coordinated operation of its components. The operator inputs the temperature setpoint and operating mode through the control panel 302 on top of the controller 301. After receiving the command, the controller 301 analyzes and processes the temperature parameters, and simultaneously displays the current temperature and operating status in real time on the control panel 302. When the temperature is lower than the setpoint, the controller 301 sends a start signal to the connected heating element 303. The heating element 303 efficiently converts electrical energy into heat energy, raising the ambient temperature. The vertical rods 304 connected to the four corners of the heating element 303 provide support, ensuring that the heating element 303 and the heating element 305 fixed to the top of the vertical rod 304 maintain a stable relative position. The two work together... The heating system expands the heating area and accelerates the heating rate. During the heating process, the temperature sensor monitors the ambient temperature in real time and feeds the data back to the controller 301. The controller 301 compares the feedback temperature with the set temperature. If the actual temperature is close to or reaches the set value, the controller 301 adjusts the working power of heating element 1 303 and heating element 2 305 to maintain a stable temperature. If the actual temperature exceeds the set value, the controller 301 will shut down heating element 1 303 and heating element 2 305 in time to prevent the temperature from getting too high. Since the bottom of the controller 301 is fixedly connected to the top rear left end of the right mounting block 9, the stable installation method ensures that the controller 301 is not affected by external interference during operation, facilitates wiring operations, and ensures the stable operation and precise control of the entire temperature control system.

[0044] Reference Figure 1 , Figure 2 and Figure 4The sliding fixing mechanism 8 includes two support blocks 801, which are used to support and fix the components. The bottom of each support block 801 is fixedly connected to the bottom of the inner side of the drying shell 1, which plays a role in stabilizing and supporting the entire sliding fixing mechanism 8. The inner side of each support block 801 is provided with a sliding groove 802, which provides a sliding track for the slider 804, allowing the slider 804 to slide smoothly. The top of each support block 801 is provided with multiple connecting blocks 803, which are used to connect the slider 804. The bottom of each connecting block 803 is fixedly connected to the slider 804. The slider 804 cooperates with the sliding groove 802 to realize the sliding function of the connecting block 803 and the connected components. The multiple sliders 804 are slidably connected to the inner side of the two sliding grooves 802, so that the connecting block 803 can slide stably along the sliding groove 802 of the support block 801, thereby realizing the flexible adjustment of the component position.

[0045] Specifically, the sliding fixing mechanism 8 can flexibly adjust the position of the components while ensuring the stability and efficiency of the entire drying process. The two support blocks 801 serve as the basic support components of the sliding fixing mechanism 8, and are firmly connected to the bottom of the inner side of the drying shell 1. The connection method not only ensures the stability of the support blocks 801 themselves, but also provides reliable support for the entire sliding fixing mechanism 8, enabling it to withstand the corresponding pressure and force during the drying process. Each support block 801 has a carefully designed groove 802 on its inner side. The groove 802 provides a precise track for the sliding of the slider 804, ensuring that the slider 804 can slide smoothly and stably, avoiding jamming or offset during the sliding process. This allows the position of the components inside the drying shell 1 to be flexibly adjusted according to actual needs to adapt to different drying processes and working scenarios.

[0046] Working principle: The cover plate 701 in the sliding mechanism 7 slides on the top of the drying shell 1 through the sliding rod 702 and the pulley 703, which facilitates the opening and closing of the equipment and the placement and removal of non-woven fabric. External air enters the protective shell 204 through the air inlet pipe 205 and is heated by the heater 201. The hot air is delivered to the drying shell 1 through the connecting pipe 202, the air vent 203 and the circulation pipe 206. Temperature control mechanism 3 regulates and maintains the internal temperature of drying shell 1 to ensure a stable drying environment. Two air ducts 401 in the air circulation mechanism 4 are fixed to the top rear side of drying shell 1. The horizontal shaft 404 drives the fan blades 405 to rotate, causing the hot air inside drying shell 1 to circulate through the air ducts 401, accelerating the drying process of non-woven fabric. As drying proceeds, the hot air with residual heat is collected by the air circulation mechanism 5. The hot air enters the protective shell 2 501 through the air inlet pipe 507. Under the guidance of the air guide plate 502, it flows upward through the support plate 5031 supporting the air outlet assembly 503 and the air duct 5032. The rotating shaft 505 drives the rotating plate 506 to rotate, flexibly adjusting the direction of hot air flow. The hot air enters the air outlet pipe 601 of the air outlet mechanism 6 and is accelerated out by the fan 603. The pressure gauge 602 monitors the air pressure in the air outlet pipe 601 in real time. The discharged hot air is delivered to the internal places that need heat energy to realize the recovery and utilization of residual heat.

[0047] Furthermore, the operator inputs the temperature setpoint and operating mode through the control panel 302 of the controller 301. After receiving the command, the controller 301 analyzes and processes the temperature parameters, and displays the current temperature and operating status in real time through the control panel 302. When the temperature is lower than the setpoint, the controller 301 sends a start signal to the connected heating element 303. The heating element 303 efficiently converts electrical energy into heat energy to raise the ambient temperature. The vertical rod 304 provides support to ensure that the heating element 303 and the heating element 305 fixed at the top of the vertical rod 304 maintain a stable relative position. The two work together to expand the heating area and accelerate the heating rate. During the heating process, the temperature sensor monitors the ambient temperature in real time and feeds the data back to the controller 301. The controller 301 compares the feedback temperature with the set temperature. If the actual temperature is close to or reaches the setpoint, the controller 301 adjusts the working power of the heating element 303 and the heating element 305 to maintain temperature stability.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-stage waste heat recovery and circulation system for a non-woven fabric dryer, comprising a drying shell (1) and two mounting blocks (9), characterized in that: An air intake heating mechanism (2) is provided on the top of the mounting block (9) on the right side. A temperature control mechanism (3) is provided on the left rear side of the top of the mounting block (9) on the right side. The temperature control mechanism (3) is used to increase the internal temperature. A wind circulation mechanism (4) is provided on the rear side of the drying shell (1). The wind circulation mechanism (4) is used to circulate the internal hot air. An air outlet circulation mechanism (5) is provided on the top of the mounting block (9) on the left side. An air outlet mechanism (6) is provided on the left side of the air outlet circulation mechanism (5). A sliding mechanism (7) is provided on the top of the drying shell (1). A sliding fixing mechanism (8) is provided inside the drying shell (1). The air intake heating mechanism (2) includes a heater (201). The bottom of the heater (201) is fixedly connected to the top of the right mounting block (9). A connecting pipe (202) is connected to the left side of the heater (201). A protective shell (204) is fixedly connected to the top of the left mounting block (9). The left side of the connecting pipe (202) passes through the bottom right side of the protective shell (204) and is connected to the air vent (203). An air intake pipe (205) is connected to the top right side of the protective shell (204). A circulation pipe (206) is connected to the bottom left side of the protective shell (204).

2. The multi-stage waste heat recovery and circulation system for a nonwoven fabric dryer according to claim 1, characterized in that: The temperature control mechanism (3) includes a controller (301). The bottom of the controller (301) is fixedly connected to the top rear left end of the right mounting block (9). The top of the controller (301) is fixedly connected to a control panel (302). The controller (301) is connected to a heating tube (303). Each of the four corners of the heating tube (303) is fixedly connected to a vertical rod (304). The tops of the multiple vertical rods (304) are fixedly connected to heating tubes (305).

3. The multi-stage waste heat recovery and circulation system for a nonwoven fabric dryer according to claim 1, characterized in that: The wind circulation mechanism (4) includes two air ducts (401). The front sides of the two air ducts (401) are fixedly connected to the rear top of the drying shell (1). Multiple fixing rings (402) are fixedly connected to the inner sides of the two air ducts (401). Connecting plates (403) are fixedly connected to the inner middle of the two left and two right fixing rings (402). Horizontal shafts (404) are rotatably connected between the adjacent two left and two right connecting plates (403). Fan blades (405) are fixedly connected to the outer middle of the two horizontal shafts (404).

4. The multi-stage waste heat recovery and circulation system for a nonwoven fabric dryer according to claim 1, characterized in that: The air circulation mechanism (5) includes a second protective shell (501). The bottom of the second protective shell (501) is fixedly connected to the top of the left mounting block (9). A guide plate (502) is fixedly connected to the middle of the inner side of the second protective shell (501). A supporting air outlet assembly (503) is provided at the bottom of the inner side of the second protective shell (501). A fixing rod (504) is provided at the top of the supporting air outlet assembly (503). A rotating shaft (505) is rotatably connected to the top of the fixing rod (504). A rotating plate (506) is fixedly connected to the outer side of the rotating shaft (505). An air inlet pipe (507) is fixedly connected to the middle of the right side of the second protective shell (501).

5. The multi-stage waste heat recovery and circulation system for a nonwoven fabric dryer according to claim 4, characterized in that: The air outlet support assembly (503) includes a support plate (5031), the outer side of which is fixedly connected to the bottom inner side of the second protective shell (501), and the front side of the support plate (5031) is fixedly connected to an air duct (5032).

6. The multi-stage waste heat recovery and circulation system for a nonwoven fabric dryer according to claim 1, characterized in that: The air outlet mechanism (6) includes an air outlet pipe (601). The right side of the air outlet pipe (601) is connected to the bottom left side of the second protective shell (501). A pressure gauge (602) is fixedly connected to the top left side of the air outlet pipe (601). A fan (603) is fixedly connected to the inside of the air outlet pipe (601).

7. The multi-stage waste heat recovery and circulation system for a nonwoven fabric dryer according to claim 1, characterized in that: The sliding mechanism (7) includes a cover plate (701), the bottom of which is slidably connected to the top of the drying shell (1). Sliding rods (702) are fixedly connected to the left and right sides of the bottom of the cover plate (701), and pulleys (703) are fixedly connected to the inner sides of the two sliding rods (702).

8. The multi-stage waste heat recovery and circulation system for a nonwoven fabric dryer according to claim 1, characterized in that: The sliding fixing mechanism (8) includes two support blocks (801). The bottom of the two support blocks (801) is fixedly connected to the bottom of the inner side of the drying shell (1). The inner side of the two support blocks (801) is provided with a sliding groove (802). The top of the two support blocks (801) is provided with multiple connecting blocks (803). The bottom of the multiple connecting blocks (803) is fixedly connected with a slider (804). The multiple sliders (804) are slidably connected to the inner side of the two sliding grooves (802).

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