Heat energy recovery system for setting machine

Abstract

The present invention provides a heat energy recovery system for a stenter, belonging to the technical field of heat recovery treatment of stenters. The system includes a filtration tower. A partition is provided inside the filtration tower to divide it into upper and lower layers. The upper and lower layers of the filtration tower are filled with clean water. An exhaust gas pipeline penetrating into the water is provided at the bottom of the filtration tower. A fan is provided at the bottom of the partition. A local swirling condensate mechanism is provided on the upper layer of the partition. The fan is connected to the swirling condensate mechanism through an exhaust air pipeline. A valve for draining water downward is provided on the partition. A pumping and circulating mechanism is installed on the filtration tower. The pumping and circulating mechanism is connected to the valve to drive its opening and closing. The present invention recovers and processes the waste heat of the stenter and then passes it into the filtration tower for final filtration and discharge. Water is injected into the upper and lower layers of the filtration tower. The tail gas is introduced into the filtration below the water surface of the lower layer to remove oil mist and impurities. The filtered gas is directed to flow by the fan to remove water vapor, avoiding the emission of small molecular oil particles and achieving the effect of efficient filtration.

Description

Technical Field

[0001] The present invention relates to the technical field of heat recovery treatment of stenter machines, and particularly to a heat energy recovery system for stenter machines. Background Art

[0002] A stenter machine is a key device in the textile process. The temperature of the exhaust gas generated by it is about 160°C. Direct emission will cause a large amount of heat waste. Currently, in order to avoid heat waste, the exhaust gas is passed into a fresh air heat exchange device to perform non-contact heat exchange with low-temperature fresh air for heat recovery and utilization.

[0003] The heat generated by the stenter machine can be recovered for fresh air heat exchange to reduce heat waste. However, there are still oil mists and a small amount of fiber impurities in the exhaust gas recovered from the stenter machine heat. When performing inlet air heat exchange, it is also necessary to consider the cleaning of impurities. Since the recovered exhaust gas and fresh air do not contact each other during the fresh air heat exchange process. While the heat exchange is completed, the impurities still remain in the exhaust gas. Such direct emission will cause environmental pollution.

[0004] In the prior art, the method of spraying is adopted to humidify the exhaust gas during the treatment of recovered heat, which can quickly adsorb impurities such as fibers and oil mists. However, since the temperature of the exhaust gas after heat exchange is still very high, when the temperature reaches 100°C, steam will be generated during spraying and discharged together with the exhaust gas. Small particle oil molecules adsorbed in the steam will affect the filtering effect and still pollute the air.

[0005] In the prior art, the method of high-voltage static electricity can be used for oil removal. The oil fume is passed into a high-voltage static electric field. Under the action of the high-voltage static electricity, the oil fume gas is ionized, the oil mist is charged, and most of it is carbonized; a small number of tiny oil particles move towards the positive and negative plates of the electric field under the action of the electric field force of the adsorption electric field and the airflow, are collected on the plates and then flow into the oil collecting tray for post-treatment and discharge; the remaining micron-sized oil mist is degraded into carbon dioxide and water by the electric field. The high-voltage static electricity oil removal has high efficiency and is commonly used in fields with high content and filtering equipment, such as oil fume purifiers, etc. And high-voltage static electricity oil removal requires a strong static electric field. When the charge content of oil particles is small, a static electric field of more than 30,000 volts needs to be provided. When we were treating the tail gas based on the waste heat of the stenter machine, we found that the oil content was limited, and the cost of the high-voltage static electricity treatment method was relatively high. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the present invention provides a heat energy recovery system for stenter machines. After heat recovery and utilization, the impurities in the exhaust gas are filtered. The tail gas is first passed into water to filter the oil mist and impurities. The fan for accelerating gas flow is improved to promote the directional flow of gas. Before discharging to the outside, the steam is fully condensed by increasing the pressure to avoid the discharge of oil particles when the tail gas is discharged.

[0007] To solve the above technical problems, the present invention solves the problem that when the tail gas temperature is too high and meets water, the generated steam will carry away some oil molecule pollutants that have come down, resulting in pollution to the air after the tail gas is discharged into the air.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] A heat energy recovery system for a stenter, comprising a filtration tower. A partition is provided inside the filtration tower to divide it into upper and lower layers. The upper and lower layers of the filtration tower are filled with clean water. An exhaust gas pipe penetrating into the water is provided at the bottom of the filtration tower. A fan for accelerating the air circulation and discharge is provided at the bottom of the partition. A local swirling condensate mechanism is provided on the upper layer of the partition. The fan is connected to the swirling condensate mechanism through an exhaust duct. A valve for draining water from the upper layer is provided on the partition. A pumping and circulating mechanism is installed on the filtration tower, and the pumping and circulating mechanism is connected to the valve to drive its opening and closing. After the waste heat of the stenter is recovered and treated, it is introduced into the filtration tower for final filtration and then discharged. Water is injected into the upper and lower layers of the filtration tower. The tail gas is introduced into the filtration area below the water surface of the lower layer to remove oil mist and impurities. The filtered gas is diverted by the fan to flow in a specific direction to remove water vapor, avoiding the emission of small molecule oil particles and achieving the effect of efficient filtration.

[0010] Preferably, the fan includes a pipe body and a cross-flow fan blade provided inside the pipe body. The pipe body is fixed on the partition and has an air inlet opening downward. Both ends of the pipe body are connected to the exhaust duct. The present invention uses a tubular fan to accelerate the air circulation in the lower layer, promote the rapid rise of the filtered gas, and divert the gas to change its vertically upward direction, facilitating the contact between the steam and the object for condensation. At the same time, the gas flowing in a specific direction enters the cyclone along the tangent, causing the gas to rotate and rise in the cyclone, allowing the steam to contact the cyclone, and using the structure of the cyclone that continuously tapers upward to increase the gas pressure above and below, enabling the steam to fully condense.

[0011] Preferably, the swirling condensate mechanism includes a cyclone and a suspension member. The cyclone is provided above the partition. The bottom side of the cyclone is connected to the exhaust duct. The top of the cyclone is connected to the outside and has a small hole at the bottom. The suspension member is movably provided inside the small hole.

[0012] Preferably, the cyclone includes a cylindrical portion, a conical portion, and an overflow pipe. The conical portion is provided above the cylindrical portion and is fixedly connected to it. The exhaust duct is connected to the cylindrical portion along the tangent. The overflow pipe is fixed in the middle of the cylindrical portion and is not connected to the outside. The small hole is opened at the middle position of the overflow pipe. The cyclone of the present invention is arranged in an inverted manner, with the conical portion located above and the opening facing upward. The gas pressure gradually increases when the gas rises in the conical portion, facilitating the condensation of the steam.

[0013] Preferably, ventilation holes are evenly formed in the circumferential direction on the side at the bottom of the overflow pipe, and the ventilation holes are arranged in an arc shape toward the air swirling direction.

[0014] Preferably, the suspension member includes an upper seal and a lower seal. The upper seal is arranged inside the overflow pipe to seal the small holes above. The lower seal floats on the water surface and is connected to the upper seal through a connecting rod. The connecting rod passes through the small holes and is in sliding fit with them.

[0015] Preferably, the pumping and circulating mechanism includes a gear pump body, a driving component for controlling the opening and closing of the valve, and a driver respectively connected to the gear pump body and the driving component. The output shaft of the driver is vertically meshed with the driving component, and the driver rotates unidirectionally to drive the gear pump body to work.

[0016] Preferably, one rotating shaft of the gear pump body extends outward and is sleeved with a ratchet wheel, and the output shaft of the driver is sleeved with a first gear meshing with the ratchet wheel.

[0017] Preferably, the driving component includes a driving shaft vertically meshed with the output shaft and a toothed plate rotatably matched with the driving shaft. A base for sliding fit with the toothed plate is arranged at the end of the driving shaft, and an elastic member for anti-lock is arranged at the end of the toothed plate.

[0018] Preferably, the driver drives the toothed plate to move, and a connecting member for controlling the opening and closing of the valve is installed on one side of the toothed plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention provides a heat energy recovery system for a stenter. After recovering and processing the waste heat of the stenter, it is introduced into a filtration tower for final filtration and then discharged. Water is injected into the upper and lower layers in the filtration tower. The tail gas is introduced into the filtration area below the water surface of the lower layer to filter out oil mist and impurities. The filtered gas is diverted by a fan to flow in a directional manner to remove water vapor, avoiding the emission of small molecule oil particles and achieving the effect of efficient filtration.

[0021] In the present invention, a partition is installed in the filtration tower for upper and lower stratification, water is injected into the upper and lower layers respectively. The lower layer of water is used to filter oil mist and impurities, and the upper layer of water is used to cool the partition and the fan on the partition, promoting the rapid condensation of the steam accompanying the filtered gas.

[0022] The present invention uses a tubular fan to accelerate the air circulation in the lower layer, promoting the rapid rise of the filtered gas, and diverting the gas to change its vertically rising direction, facilitating the contact between the steam and the object for condensation. At the same time, the gas flowing in a directional manner enters the cyclone along the tangent, allowing the gas to rotate and rise in the cyclone, enabling the steam to contact the cyclone, and using the structure of the cyclone continuously narrowing upward to increase the gas pressure above and below, allowing the steam to fully condense. Description of the Drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 Schematic diagram of the overall three-dimensional structure of the present invention;

[0025] Figure 2 Schematic diagram of the overall front view of the cross-section of the filtration tower of the present invention;

[0026] Figure 3 Schematic diagram of the connection structure between the fan and the swirl condensate mechanism of the present invention;

[0027] Figure 4 Schematic diagram of the upward view of the connection structure between the fan and the swirl condensate mechanism of the present invention;

[0028] Figure 5 Schematic diagram of the upward view of the disassembled fan of the present invention;

[0029] Figure 6 Schematic diagram of the cross-section structure of the cyclone of the present invention;

[0030] Figure 7 Schematic diagram of the suspension structure of the present invention;

[0031] Figure 8 Schematic diagram of the overall structure of the pumping circulation mechanism of the present invention;

[0032] Figure 9 Schematic diagram of the drive component of the present invention;

[0033] Figure 10 Schematic diagram of the toothed plate and related components of the present invention;

[0034] Figure 11 Schematic diagram of the ratchet and the first gear of the present invention.

[0035] Description of drawing numbers: 100, filtration tower; 200, partition board; 300, exhaust gas pipeline; 400, fan; 401, pipe body; 402, cross-flow fan blades; 403, air inlet; 500, cyclone condensate mechanism; 501, cyclone; 5011, columnar part; 5012, conical part; 5013, overflow pipe; 5014, ventilation holes; 502, suspension member; 5021, upper seal; 5022, lower seal; 5023, connecting rod; 600, valve; 700, pumping circulation mechanism; 701, gear pump body; 702, drive assembly; 7021, drive shaft; 7022, toothed plate; 7023, base; 7024, elastic member; 703, driver; 704, ratchet; 705, first gear; 706, connecting member. Detailed implementation manners

[0036] The present invention will be further described in detail below with reference to the drawings.

[0037] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious deformations. The basic principles defined in the following description can be used in other implementation manners, deformation schemes, improvement schemes, equivalent schemes, and other technical schemes without departing from the spirit and scope of the present invention.

[0038] Those skilled in the art should understand that in the disclosure of the present invention, the orientations or positions indicated by the terms "longitudinal", "transverse", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or position relationships shown in the drawings. It is only for the convenience of simplifying the description of the present invention, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present invention.

[0039] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, and in other embodiments, the number of this element can be multiple. The term "one" should not be construed as a limitation on the number.

[0040] Embodiment 1:

[0041] Please refer to Figure 1-2, A heat energy recovery system for a stenter, comprising a filtration tower 100. A partition plate 200 for dividing it into upper and lower layers is provided inside the filtration tower 100. The upper and lower layers of the filtration tower 100 are both filled with purified water. An exhaust gas pipeline 300 penetrating into the water is provided at the bottom of the filtration tower 100. A fan 400 for accelerating air circulation and discharge is provided at the bottom of the partition plate 200. A local swirling condensate mechanism 500 is provided in the upper layer of the partition plate 200. The fan 400 is connected to the swirling condensate mechanism 500 through an exhaust duct. A valve 600 for draining water from the upper layer is provided on the partition plate 200. A pumping and circulating mechanism 700 is installed on the filtration tower 100. The pumping and circulating mechanism 700 is connected to the valve 600 to drive its opening and closing.

[0042] In the present invention, the tail gas from the waste heat treatment of the stenter is introduced into the filtration tower 100. The filtration tower 100 is divided into upper and lower layers, and both are filled with purified water. The purified water in the upper and lower layers is controlled to circulate intermittently through the pumping and circulating mechanism 700. The exhaust gas is introduced into the water in the lower layer for oil and impurity removal filtration. The filtered gas is driven by the fan 400 to pass upward through the purified water in the upper layer and then discharged.

[0043] The following will be described in detail with reference to the accompanying drawings for the embodiments of the present application:

[0044] Please refer to Figure 1-11 , A heat energy recovery system for a stenter provided by the present application, comprising a filtration tower 100, a partition plate 200, an exhaust gas pipeline 300, a fan 400, a swirling condensate mechanism 500, and a pumping and circulating mechanism 700. A partition plate 200 is installed inside the filtration tower 100 to divide it into upper and lower layers, and both the upper and lower layers are filled with purified water; the lower layer is in a sealed state, and the top of the upper layer of the filtration tower 100 is connected to the outside. The exhaust gas pipeline 300 is connected to the lower part of the filtration tower 100. When the exhaust gas enters the water in the lower layer of the filtration tower 100 through the exhaust gas pipeline 300, the oil stains and impurities are filtered out and then discharged upward.

[0045] The lower layer of the filtration tower 100 is in a sealed state. The fan 400 is installed below the partition plate 200. The end of the fan 400 is connected to an exhaust duct, and the exhaust duct extends upward through the partition plate 200. The air in the lower layer flows upward through the fan 400 and the exhaust duct.

[0046] The fan 400 adopts a cross-flow design, including a pipe body 401 and cross-flow fan blades 402. The cross-flow fan blades 402 are installed inside the pipe body 401. The pipe body 401 is fixed to the bottom surface of the partition plate 200. An air inlet 403 is opened in the middle of the bottom of the pipe body 401. The cross-flow fan blades 402 are tubular. When the fan 400 works, the cross-flow fan blades 402 rotate at high speed. The air in the lower layer of the filtration tower 100 enters the inside of the pipe body 401 through the air inlet 403. Since the pipe body 401 has an opening only on one side at the bottom, during operation, the air flow converges towards the middle of the cross-flow fan blades 402 and then diffuses towards both ends. The pipe body 401 is connected to the exhaust duct at both sides, and the gas will flow into the exhaust duct at the ends of the cross-flow fan blades 402.

[0047] In this application, the fan 400 is used to accelerate the air circulation, and at the same time, divert and direct the discharge of the lower-layer air. The lower-layer air does not rise vertically, which is convenient for the steam generated after the waste gas enters the water to contact the object for condensation. At the same time, the purified water is separated from the upper layer of the fan 400 by the partition 200, which is convenient for secondary cooling steam condensation.

[0048] In addition, a swirl condensate mechanism 500 communicating with the exhaust duct is arranged on the upper layer of the partition 200. The fan 400 controls the flow direction of the lower-layer gas and controls it to be directed into the swirl condensate mechanism 500 for rotation, so that the steam in the gas is completely condensed.

[0049] It should be noted that the fan 400 is connected to the swirl condensate mechanism 500 through the exhaust duct. After the lower-layer air enters the pipe body 401, it enters a flow space that promotes steam condensation, including making the rising air flow horizontally and entering the swirl condensate mechanism 500 for rotation. Moreover, both the fan 400 and the swirl condensate mechanism 500 are arranged around the purified water in the upper layer, which is convenient for cooling.

[0050] In this application, the swirl condensate mechanism 500 is composed of a swirler 501, a suspension member 502, etc. The swirler 501 is inverted with the cone part 5012 facing upward. Two exhaust ducts are connected to the cylindrical part 5011 of the swirler 501 along the tangential direction from two directions, so that the gas enters the swirler 501 and rises in a rotating posture. Since the cone part 5012 faces upward and is in a continuously converging shape, the pressure of the rising gas will increase, and the gas will contact the cone part 5012 when rising, accelerating steam condensation.

[0051] An overflow pipe 5013 is installed in the middle of the bottom end of the cylindrical part 5011. When the gas swirls in the swirler 501, stratification will occur, and the condensed water will gather in the middle and flow downward into the overflow pipe 5013.

[0052] The bottom of the overflow pipe 5013 is sealed and communicated with the outside through a small hole, and a suspension member 502 is installed at the small hole for sealing. There is a sliding connection relationship between the small hole and the suspension member 502. The swirler 501 is erected above the water surface, and the suspension member 502 is on the water surface and floats up and down according to the water level height.

[0053] The floating member 502 is composed of an upper seal 5021, a lower seal 5022, and a connecting rod 5023. The upper seal 5021 is located inside the cyclone 501 and can seal the small hole. The lower seal 5022 is inside the cyclone 501 and is connected to the upper seal 5021 through the connecting rod 5023. The connecting rod 5023 slides up and down inside the small hole without sealing it. When the water level is high, the lower seal 5022 floats up to keep the small hole open, allowing the condensate to flow out. When the water level is low, the floating member 502 descends, and the upper seal 5021 seals the small hole, and the condensate will accumulate in the cyclone 501.

[0054] To promote the circulation of gas in the cyclone 501 as well, the bottom of the overflow pipe 5013 is sealed, but arc-shaped ventilation holes 5014 are circumferentially provided on the side of the bottom of the overflow pipe 5013. After a small amount of gas flowing downward in the middle of the cyclone 501 enters the overflow pipe 5013, it reflows along the side ventilation holes 5014 and merges into the swirling gas.

[0055] In some embodiments, the end of the overflow pipe 5013 is in communication with the outside, and the condensate will flow directly downward.

[0056] In this application, the water level in the upper layer of the filtration tower 100 is in a changing state. Mainly, a pumping and circulating mechanism 700 is provided outside the filtration tower 100 to regularly pump the water in the lower layer to the upper layer to raise the water level. At the same time, a valve 600 is installed at the partition 200, and the pumping and circulating mechanism 700 can control the opening and closing of the valve 600 to realize the return of the water in the upper layer to the lower layer.

[0057] The pumping and circulating mechanism 700 is composed of a gear pump body 701, a driving assembly 702, a driver 703, etc. The gear pump body 701 pumps water by the rotation and meshing of a pair of gears. The upper and lower ends of the gear pump body 701 are respectively connected to water pipes. One water pipe leads to the bottom of the filtration tower 100, and the other water pipe is arranged above the partition 200. When the gear pump body 701 works, it can pump the purified water in the lower layer to the upper layer.

[0058] The driver 703 is respectively connected to the gear pump body 701 and the drive assembly 702. The output shaft of the driver 703 is vertically meshed with the drive assembly 702, and the driver 703 rotates unidirectionally to drive the gear pump body 701 to work. Specifically, a first gear 705 is sleeved in the middle of the output shaft of the driver 703, and a bevel gear is connected to the end; a ratchet 704 is sleeved on the extended shaft of a gear in the gear pump body 701. The first gear 705 is unidirectionally meshed with the ratchet 704. The driver 703 can only control the gear pump body 701 to pump water from bottom to top. The drive assembly 702 is composed of a drive shaft 7021, a toothed plate 7022, etc. A bevel gear is sleeved in the middle of the drive shaft 7021, and the two bevel gears are vertically meshed. The driver 703 can drive the drive shaft 7021 to rotate. The toothed plates 7022 are slidably arranged on the bases 7023 at both ends of the drive shaft 7021. A second gear meshed with the toothed plate 7022 is sleeved at the end of the driver 703. The drive shaft 7021 can drive the toothed plate 7022 to slide, and the sliding distance of the toothed plate 7022 is limited to prevent the toothed plate 7022 from sliding to one side to the maximum distance and affecting the continuous operation of the driver 703. Elastic members 7024 for anti-lock are symmetrically arranged at both ends of the toothed plate 7022, and the elastic members 7024 can continuously mesh with the second gear.

[0059] A connecting member 706 is connected to the toothed plate 7022. The valve 600 is sealed by the piston plugging method. The connecting member 706 is connected to the piston, and the movement of the piston is controlled by the toothed plate 7022 to control the opening and closing of the valve 600. During implementation, when the driver 703 rotates forward, the gear pump body 701 pumps water upward, and the valve 600 is in a closed state. When the driver 703 flips, the gear pump body 701 stops working, and the valve 600 is in an open state.

[0060] During implementation, the driver 703 is not in a continuous working state, but pumps water and drains water intermittently.

[0061] It should be noted that the water in the upper and lower parts of the filtration tower 100 will be replaced after being used for a certain period of time.

[0062] In some embodiments, the gear pump body 701 can be connected to external purified water to convey the purified water to the upper layer, and a drain pipe is connected at the lower water surface. The purified water can be sent to the upper layer of the partition 200 and then conveyed to the lower layer, and the excess water in the lower layer will be discharged outward through the drain pipe. At the same time, the oil stains and impurities floating on the lower water surface can be filtered.

[0063] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and described in the embodiments. Without departing from the above principles, the embodiments of the present invention can have any deformation or modification.

Claims

1. Heat recovery system for setting machine, comprising a filtration tower (100), characterized in that: Inside the filter tower (100), there is a partition plate (200) that divides it into upper and lower layers. The upper and lower layers of the filter tower (100) are filled with purified water. At the bottom of the filter tower (100), there is an exhaust gas pipe (300) that penetrates into the water. At the bottom of the partition plate (200), there is a fan (400) that accelerates the air circulation and discharge. Above the partition plate (200), there is a swirl condensate mechanism (500). The fan (400) is connected to the swirl condensate mechanism (500) through an exhaust duct. On the partition plate (200), there is a valve (600) for draining water from the upper layer. A pumping and circulating mechanism (700) is installed on the filter tower (100). The pumping and circulating mechanism (700) is connected to the valve (600) to drive its opening and closing. The fan (400) includes a pipe body (401) and a cross-flow fan blade (402) arranged inside the pipe body (401). The pipe body (401) is fixed on the partition plate (200) and has an air inlet (403) opened downward. Both ends of the pipe body (401) are connected to the exhaust duct. The swirl condensate mechanism (500) includes a swirler (501) and a floating member (502). The swirler (501) is arranged above the partition plate (200). The bottom side of the swirler (501) is connected to the exhaust duct. The top end of the swirler (501) is connected to the outside, and a small hole is opened at the bottom. The floating member (502) is movably arranged inside the small hole. The swirler (501) includes a cylindrical part (5011) and a conical part (5012). The conical part (5012) is arranged above the cylindrical part (5011) and is connected and fixed to it. The exhaust duct is connected to the cylindrical part (5011) along the tangent.

2. The heat energy recovery system of a setting machine according to claim 1, characterized in that: The swirler (501) further includes an overflow pipe (5013). The overflow pipe (5013) is fixed in the middle of the cylindrical part (5011) and is not connected to the outside. The small hole is opened at the middle position of the overflow pipe (5013).

3. The heat energy recovery system of a stenter according to claim 2, characterized in that: Circular ventilation holes (5014) are evenly opened in the circumferential direction on the bottom side of the overflow pipe (5013). The ventilation holes (5014) are arranged in an arc shape towards the air swirl direction.

4. The heat energy recovery system of a stenter according to claim 3, characterized in that: The floating member (502) includes an upper seal (5021) and a lower seal (5022). The upper seal (5021) is arranged inside the overflow pipe (5013) to seal the small hole from above. The lower seal (5022) floats on the water surface and is connected to the upper seal (5021) through a connecting rod (5023). The connecting rod (5023) passes through the small hole and is in sliding fit with it.

5. The heat energy recovery system of a setting machine according to claim 4, characterized in that: The pumping and circulating mechanism (700) includes a gear pump body (701), a driving component (702) for controlling the opening and closing of the valve (600), and a driver (703) respectively connected to the gear pump body (701) and the driving component (702). The output shaft of the driver (703) is vertically engaged with the driving component (702). The driver (703) rotates unidirectionally to drive the gear pump body (701) to work.

6. The heat energy recovery system of a setting machine according to claim 5, characterized in that: One rotating shaft of the gear pump body (701) extends outward and is sleeved with a ratchet wheel (704), and a first gear (705) meshing with the ratchet wheel (704) is sleeved on the output shaft of the driver (703).

7. The heat energy recovery system of a setting machine according to claim 6, wherein: The driving assembly (702) includes a driving shaft (7021) vertically meshing with the output shaft and a toothed plate (7022) rotatably fitted with the driving shaft (7021). A base (7023) slidably fitted with the toothed plate (7022) is provided at the end of the driving shaft (7021), and an elastic member (7024) for anti-lock is provided at the end of the toothed plate (7022).

8. The heat energy recovery system for a stenter according to claim 7, wherein: The driver (703) drives the toothed plate (7022) to move, and a connecting member (706) for controlling the opening and closing of the control valve (600) is installed on one side of the toothed plate (7022).

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