A device for recycling exhaust gas waste heat of industrial heat treatment

Abstract

The utility model discloses an industrial heat treatment exhaust fume heat recovery device in the technical field of industrial heat treatment exhaust fume heat recovery, including support base plate, the top of support base plate is installed with first transmission case, one side of first transmission case is provided with second transmission case, and the bottom of second transmission case is installed with drive motor, and the top of first transmission case and second transmission case still is installed with exhaust fume treatment subassembly, and the reasonable combination of the staged heat conduction cavity and the staged heat conduction pipe spare in the heat recovery tank, wherein the staged heat conduction cavity constructs multistage flow channel with air guide pipe, shunt sleeve and guide port, makes high temperature flue gas pass through each heat conduction area in turn, and fully releases heat energy, and the staged heat conduction pipe spare is composed of multiple guide pipes and annular heat exchange pipeline, can realize multilevel efficient heat exchange of flue gas and internal flowing cold water, and the structure not only can maximize recovery flue gas waste heat, but also can significantly reduce the temperature of the exhaust flue gas, avoids the direct external discharge of high temperature flue gas to cause energy waste and environmental heat pollution.

Description

Technical Field

[0001] This utility model relates to the field of industrial heat treatment flue gas waste heat recovery technology, and in particular to a device for recovering industrial heat treatment flue gas waste heat. Background Technology

[0002] Industrial heat treatment equipment is specialized equipment used for heating, holding, and cooling metals, alloys, or other materials. Its main purpose is to improve the mechanical, physical, and chemical properties of materials by controlling the heating temperature, time, and cooling rate to alter their internal microstructure. This equipment typically includes a heating furnace, temperature control system, conveying mechanism, cooling system, and atmosphere conditioning device. Industrial heat treatment processes generally generate large amounts of high-temperature waste gas. If this waste gas is directly emitted without adequate recovery and utilization, it not only causes significant energy waste but also leads to environmental thermal pollution and dust emissions.

[0003] Currently, most existing smoke extraction equipment only has basic ventilation and purification functions, but lacks an efficient waste heat recovery system. It cannot fully recover and reuse the heat energy contained in the exhaust gas, resulting in low heat energy utilization, high energy consumption, and increased operating costs. At the same time, traditional smoke extraction devices have complex structures and limited transmission efficiency, failing to rationally convert the transmission force generated during the smoke extraction process for internal cleaning. They cannot effectively scrape and clean the inner wall of the smoke filter screen and the air inlet pipe 52 simultaneously, causing dust and impurities to accumulate after long-term operation, resulting in filter screen blockage, reduced smoke flow efficiency, and affecting the overall smoke extraction and waste heat recovery effect.

[0004] Therefore, there is an urgent need to develop a device for recovering waste heat from industrial heat treatment exhaust gas that is structurally sound, reliably driven, and combines purification and waste heat recovery functions, in order to achieve energy conservation, emission reduction, and resource reuse. Based on this, we propose a device for recovering waste heat from industrial heat treatment exhaust gas to address the aforementioned problems. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of these documents, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] Therefore, the purpose of this utility model is to provide a device for recovering waste heat from industrial heat treatment exhaust, which can solve the problems of existing exhaust equipment lacking efficient waste heat recovery, low heat energy utilization rate, high energy consumption, and inability to effectively clean the flue gas filter screen and the inner wall of the air inlet pipe, resulting in dust accumulation, filter screen blockage, and reduced flue gas flow efficiency.

[0007] To solve the above technical problems, this utility model provides a device for recovering waste heat from industrial heat treatment exhaust, which adopts the following technical solution: it includes a supporting base plate, a first transmission box is installed on the top of the supporting base plate, a second transmission box is provided on one side of the first transmission box, a drive motor is installed at the bottom of the second transmission box, and exhaust treatment components are also installed on the top of the first transmission box and the second transmission box. The smoke exhaust treatment assembly includes a smoke purification tank, which is installed on the top of the first transmission box. An air inlet pipe is connected to the bottom of one side of the smoke purification tank. A waste heat recovery tank is provided on the side of the smoke purification tank away from the air inlet pipe. The waste heat recovery tank is connected to the top of the second transmission box. An air supply pipe is connected between the top of the waste heat recovery tank and the top of the smoke purification tank. An exhaust pipe is also connected to the top of the waste heat recovery tank.

[0008] Optionally, the second transmission box and the first transmission box are connected by a first transmission shaft via bearings, and a first bevel gear is installed at each end of the first transmission shaft.

[0009] Optionally, both the first transmission box and the second transmission box have a second transmission shaft connected to them via bearings. One set of the second transmission shafts is connected to the output end of the drive motor, and one end of the second transmission shaft is connected to a second bevel gear.

[0010] Optionally, the second bevel gear is structurally matched with the first bevel gear, and the second bevel gear and the first bevel gear are meshed together.

[0011] Optionally, a metal mounting ring is fixedly connected inside the flue gas purification tank. Multiple sets of connecting rods are slidably connected around the metal mounting ring. An impurity filter screen is fixedly connected to one end of each set of connecting rods. A compression spring is sleeved in the middle of each set of connecting rods. A third drive shaft is connected to the bottom of the flue gas purification tank via a bearing. The third drive shaft is connected to a second drive shaft via a connecting flange. A first scraper is installed at one end of the third drive shaft. The first scraper is in contact with the bottom of the impurity filter screen. An auxiliary drive cover is connected to the middle of the third drive shaft via a bearing. A fixing rod is also fixedly connected between the auxiliary drive cover and the inner side of the flue gas purification tank.

[0012] Optionally, a third bevel gear is installed in the middle of the third drive shaft. The third bevel gear is located inside the auxiliary drive cover. A second scraper is connected to one side of the auxiliary drive cover via a bearing. The second scraper is in contact with the wall of the air intake pipe. A fourth bevel gear is also installed at one end of the second scraper.

[0013] Optionally, the fourth bevel gear is structurally matched with the third bevel gear, and the fourth bevel gear and the third bevel gear are meshed together.

[0014] Optionally, the waste heat recovery tank is provided with a graded heat conduction cavity inside, and the waste heat recovery tank is also provided with graded heat conduction pipes inside.

[0015] Optionally, the graded heat-conducting cavity includes a gas guide pipe, which is connected to the gas supply pipeline. A spiral blade is provided at the bottom of the gas guide pipe, and the spiral blade is connected to the bottom of the waste heat recovery tank through a bearing. The spiral blade is connected to the second drive shaft through a connecting flange. A first diversion sleeve is provided on the outside of the gas guide pipe, and a second diversion sleeve is also provided on the outside of the first diversion sleeve. The second diversion sleeve is fixed to the top of the gas guide pipe. A flow guide port is also provided between the first diversion sleeve, the second diversion sleeve, and the waste heat recovery tank.

[0016] Optionally, the graded heat conduction pipe fitting includes two sets of first guide pipes, both sets of first guide pipes are disposed at both ends of the outer side of the waste heat recovery tank, and each set of first guide pipes is connected to an inlet / outlet pipe on one side. A second guide pipe is disposed on one side of the two sets of first guide pipes, and the second guide pipe is disposed between the waste heat recovery tank and the second distribution sleeve. A third guide pipe is disposed on one side of the two sets of second guide pipes, and the third guide pipe is disposed between the second distribution sleeve and the first distribution sleeve. A fourth guide pipe is disposed on one side of the two sets of third guide pipes, and the fourth guide pipe is disposed between the first distribution sleeve and the gas guide pipe. Multiple sets of heat exchange pipes distributed in a circumferential array are also connected between the first guide pipe, the second guide pipe, the third guide pipe, and the fourth guide pipe.

[0017] In summary, this utility model has at least one of the following beneficial effects: 1. In this utility model, through the synergistic effect of the drive motor and the multi-stage transmission mechanism, the spiral blades are efficiently driven to rotate counterclockwise, forming a stable and powerful airflow suction. This allows the high-temperature exhaust gas in the flue gas purification tank to be smoothly drawn into the waste heat recovery tank through the air inlet pipe and the air guide pipe, realizing the rapid and uniform flow of flue gas inside the exhaust gas treatment component. This provides continuous and reliable airflow power support for subsequent efficient heat exchange, thereby significantly improving the operating efficiency and exhaust gas treatment capacity of the device.

[0018] 2. In this utility model, through the precise multi-stage transmission design inside the first and second transmission boxes, and utilizing the efficient power linkage between the second transmission shaft, the second bevel gear, the first transmission shaft, and the first bevel gear, not only are the spiral blades driven to complete the air extraction function, but the third transmission shaft is also driven to rotate synchronously. Combined with the tight fit between the first scraper and the bottom of the impurity filter screen, automatic scraping and cleaning of soot and dust impurities can be achieved. At the same time, the metal mounting ring and the compression spring form an elastic support, ensuring that the scraper and the filter screen always remain in close contact, effectively preventing filter screen blockage, ensuring the stability of flue gas purification effect, and reducing equipment maintenance costs and frequency.

[0019] 3. In this utility model, through the rational combination of the graded heat-conducting cavity and graded heat-conducting pipes inside the waste heat recovery tank, the graded heat-conducting cavity utilizes the gas guide pipe, the diversion sleeve and the guide port to construct a multi-level flow channel, so that the high-temperature flue gas passes through each heat-conducting area in sequence and fully releases heat energy. The graded heat-conducting pipes are composed of multiple sets of guide pipes and annular heat exchange pipelines, which can realize multi-level and efficient heat exchange between flue gas and internal flowing cold water. This structure can not only maximize the recovery of waste heat from flue gas, but also significantly reduce the temperature of the discharged flue gas, avoid the direct discharge of high-temperature flue gas causing energy waste and environmental thermal pollution, and achieve the dual goals of energy conservation, emission reduction and efficient resource utilization. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a sectional view of the first transmission box of this utility model; Figure 3 This is a schematic diagram of the smoke extraction treatment component of this utility model; Figure 4 This is a cross-sectional view of the flue gas purification tank of this utility model; Figure 5 This is a cross-sectional view of the waste heat recovery tank of this utility model; Figure 6 This is a schematic diagram of the graded heat-conducting cavity structure of this utility model; Figure 7 This is a schematic diagram of the graded heat-conducting pipe structure of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Support base plate; 2. First transmission box; 3. Second transmission box; 31. Second transmission shaft; 32. Second bevel gear; 33. Connecting flange; 4. Drive motor; 5. Smoke exhaust treatment assembly; 51. Smoke purification tank; 511. Metal mounting ring; 512. Connecting rod; 513. Impurity filter screen; 514. Compression spring; 515. Third transmission shaft; 5151. Third bevel gear; 516. First scraper; 517. Auxiliary transmission cover; 5171. Second scraper; 5172. Fourth bevel gear; 518. Fixing rod 52. Inlet pipe; 53. Waste heat recovery tank; 531. Staged heat conduction cavity; 5311. Air guide pipe; 5312. Spiral blade; 5313. First diversion sleeve; 5314. Second diversion sleeve; 5315. Flow guide port; 532. Staged heat conduction fittings; 5321. First flow guide pipe; 5322. Inlet and outlet pipes; 5323. Second flow guide pipe; 5324. Third flow guide pipe; 5325. Fourth flow guide pipe; 5326. Heat exchange pipe; 54. Gas transmission pipe; 55. Exhaust pipe; 6. First drive shaft; 7. First bevel gear. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0024] Example: Refer to Figures 1 to 6This utility model provides an embodiment of a device for recovering waste heat from industrial heat treatment exhaust gas. It includes a supporting base plate 1, a first transmission box 2 mounted on the top of the supporting base plate 1, a second transmission box 3 located on one side of the first transmission box 2, a drive motor 4 mounted on the bottom of the second transmission box 3, and exhaust gas treatment components 5 mounted on the top of the first and second transmission box 2. The exhaust gas treatment components 5 include a flue gas purification tank 51, which is mounted on the top of the first transmission box 2. An air inlet pipe 52 is connected to the bottom of one side of the flue gas purification tank 51. A waste heat recovery tank 53 is located on the side of the flue gas purification tank 51 away from the air inlet pipe 52, and the waste heat recovery tank 53 is connected to the top of the second transmission box 3. A gas transmission pipeline 54 is connected between the top of the waste heat recovery tank 53 and the top of the flue gas purification tank 51. An exhaust pipeline 55 is also connected to the top of the waste heat recovery tank 53. This flue gas waste heat treatment device, through the coordinated use of the flue gas purification tank 51, the inlet pipeline 52, the waste heat recovery tank 53, the gas transmission pipeline 54, and the exhaust pipeline 55, can introduce high-temperature waste gas from the inlet pipeline 52 into the flue gas purification tank 51 for preliminary purification treatment, then transport it to the waste heat recovery tank 53 through the gas transmission pipeline 54 for heat energy recovery treatment, and finally discharge it smoothly through the exhaust pipeline 55. This achieves continuous treatment of waste gas purification, waste heat recovery, and emission, improves flue gas circulation efficiency and heat energy utilization rate, and ensures the efficient operation and energy-saving effect of the system.

[0025] A first drive shaft 6 is connected to the second transmission box 3 and the first transmission box 2 via bearings. First bevel gears 7 are mounted at both ends of the first drive shaft 6. Through the bearing connection between the second transmission box 3 and the first transmission box 2, and the first bevel gears 7 at both ends, the power of the drive motor 4 can be effectively transmitted to the transmission system inside the first transmission box 2, ensuring the synchronous operation of the multi-stage transmission mechanism. This achieves the coordinated drive of the spiral blade 5312 and other related transmission components, ensuring the efficient and stable operation of functions such as flue gas extraction, filter cleaning, and waste heat recovery. Both the first transmission box 2 and the second transmission box 3 have second drive shafts 31 connected to their interiors via bearings. One set of second drive shafts 31 is connected to the output end of the drive motor 4. One end of the second drive shaft 31 is connected to a second bevel gear 32. The second drive shafts 31 connected to the bearings inside the first transmission box 2 and the second transmission box 3, one set of which is connected to the output end of the drive motor 4... The transmission connection, with a second bevel gear 32 installed at one end, can efficiently transmit the rotational power of the drive motor 4 to each level of the transmission system components. Through the meshing of the second bevel gear 32 and the first bevel gear 7, the synchronous linkage of the multi-stage transmission mechanism is realized, which can drive the spiral blade 5312 and related scraping devices to operate in a coordinated manner, realizing the efficient operation of high-temperature flue gas extraction, automatic cleaning of the filter screen and air inlet pipe 52, and waste heat recovery. The second bevel gear 32 and the first bevel gear 7 are structurally matched and meshed. Through the structural matching and meshing connection of the second bevel gear 32 and the first bevel gear 7, the rotational power of the second transmission shaft 31 can be reliably transmitted to the first transmission shaft 6. Through meshing transmission, the synchronous rotation between the two shafts is realized, which can drive the related transmission components inside the first transmission box 2 to operate in coordination, realize the synchronous drive of the spiral blade 5312 and the scraping device, and ensure that the flue gas extraction and internal cleaning treatment are carried out efficiently and continuously.

[0026] A metal mounting ring 511 is fixedly connected inside the flue gas purification tank 51. Multiple sets of connecting rods 512 are slidably connected around the metal mounting ring 511. Impurity filter screens 513 are fixedly connected to one end of each set of connecting rods 512. Compression springs 514 are fitted around the middle of each set of connecting rods 512. A third drive shaft 515 is connected to the bottom of the flue gas purification tank 51 via a bearing. The third drive shaft 515 is connected to the second drive shaft 31 via a connecting flange 33. A first scraper plate 516 is installed at one end of the third drive shaft 515. The first scraper plate 516 and the bottom of the impurity filter screen 513 are in contact fit. The middle of the third drive shaft 515... An auxiliary transmission cover 517 is connected via a bearing. A fixing rod 518 is also fixedly connected between the auxiliary transmission cover 517 and the inner side of the flue gas purification tank 51. A metal mounting ring 511 is fixedly installed inside the flue gas purification tank 51, and multiple sets of connecting rods 512 are slidably connected around it. At the same time, one end of the connecting rod 512 is fixedly connected to the impurity filter screen 513, and a compression spring 514 is sleeved in the middle. This allows the impurity filter screen 513 to maintain elastic support and a stable position during flue gas flow. Power can be reliably transmitted to the third transmission shaft 515 via the bottom bearing and its connecting flange 33 with the second transmission shaft 31. The first scraper 516 at the end of the shaft rotates and cleans the impurity filter screen 513 by contacting and engaging with the bottom of the screen. Simultaneously, the middle of the third drive shaft 515 is connected to the auxiliary drive cover 517 via a bearing and is fixedly connected to the fixing rod 518. This protects the transmission components and ensures the stability of the first scraper 516 during rotation. A third bevel gear 5151 is installed in the middle of the third drive shaft 515, located inside the auxiliary drive cover 517. A second scraper 5171 is connected to one side of the auxiliary drive cover 517 via a bearing. The second scraper 5171 is in contact with the wall of the air intake pipe 52. A fourth bevel gear 5172 is also installed at one end of 71. By installing the third bevel gear 5151 in the middle of the third drive shaft 515 and placing it inside the auxiliary drive cover 517, and connecting the second scraper plate 5171 to one side of the auxiliary drive cover 517 via a bearing and engaging it with the wall of the air intake pipe 52, and then installing the fourth bevel gear 5172 at one end of the second scraper plate 5171, the second scraper plate 5171 can be driven to rotate synchronously when the third drive shaft 515 rotates through the meshing of the third bevel gear 5151 and the fourth bevel gear 5172, soot and dust on the wall of the air intake pipe 52 can be automatically scraped off.

[0027] The fourth bevel gear 5172 is structurally matched with the third bevel gear 5151, and the fourth bevel gear 5172 and the third bevel gear 5151 are meshed together. By matching the structures of the fourth bevel gear 5172 and the third bevel gear 5151 and adopting a meshing connection, power can be transmitted to the second scraper plate 5171 when the third drive shaft 515 rotates, causing it to rotate synchronously along the inner wall of the air intake pipe 52. Through this meshing connection, the automatic scraping and cleaning of soot and dust on the inner wall of the air intake pipe 52 can be achieved, ensuring that the inside of the pipe remains unobstructed, which can improve efficiency. To improve flue gas circulation efficiency, the waste heat recovery tank 53 is equipped with a graded heat-conducting cavity 531 and graded heat-conducting pipes 532. By setting the graded heat-conducting cavity 531 and graded heat-conducting pipes 532 inside the waste heat recovery tank 53, the high-temperature flue gas can be guided to flow in stages and transfer heat in multiple layers inside the tank. This allows the flue gas to fully contact the cold water in the heat-conducting pipes, achieving efficient heat transfer. This enables the waste heat in the flue gas to be fully recovered and utilized, reducing the temperature of the discharged flue gas and achieving the effects of energy saving, emission reduction, and energy reuse.

[0028] The staged heat-conducting cavity 531 includes a gas guide pipe 5311, which is continuously connected to the gas supply pipeline 54. A spiral blade 5312 is provided at the bottom of the gas guide pipe 5311, and the spiral blade 5312 is connected to the bottom of the waste heat recovery tank 53 via a bearing. The spiral blade 5312 is connected to the second drive shaft 31 via a connecting flange 33. A first diversion sleeve 5313 is provided on the outside of the gas guide pipe 5311, and a second diversion sleeve 5314 is also provided on the outside of the first diversion sleeve 5313. The second diversion sleeve 5314 is fixed to the top of the gas guide pipe 5311. A flow guide port 5315 is provided between the first diversion sleeve 5313, the second diversion sleeve 5314, and the waste heat recovery tank 53. By providing the gas guide pipe 5311 in the staged heat-conducting cavity 531 and connecting it to the gas supply pipeline 54... The through connection allows flue gas to flow smoothly from the inlet pipe 52 into the waste heat recovery tank 53, achieving stable flue gas introduction. By setting a spiral blade 5312 at the bottom of the air guide pipe 5311 and connecting it to the bottom of the tank via a bearing, and simultaneously connecting it to the second drive shaft 31 via a connecting flange 33, the spiral blade 5312 can be driven to rotate, forming an airflow suction effect, improving the flow efficiency of flue gas inside the waste heat recovery tank 53, and achieving efficient transport and uniform distribution of flue gas. By setting a first diversion sleeve 5313 and a second diversion sleeve 5314 on the outside of the air guide pipe 5311, and opening a guide port 5315 between the sleeves and between the sleeves and the waste heat recovery tank 53, the flue gas can be divided into stages, forming a multi-stage flow channel, allowing the flue gas to pass through each heat conduction area in sequence, achieving full release and efficient transfer of heat, thereby improving waste heat recovery efficiency and reducing exhaust temperature.

[0029] The graded heat conduction pipe fitting 532 includes two sets of first guide pipes 5321, both sets of first guide pipes 5321 are located at both ends of the outer side of the waste heat recovery tank 53, and each set of first guide pipes 5321 is connected to an inlet / outlet pipe 5322 on one side. A second guide pipe 5323 is located on one side of each set of first guide pipes 5321, between the waste heat recovery tank 53 and the second diversion sleeve 5314. The two sets of second guide pipes 5323... A third guide pipe 5324 is provided on one side, and the third guide pipe 5324 is located between the second diversion sleeve 5314 and the first diversion sleeve 5313. A fourth guide pipe 5325 is provided on one side of the two sets of third guide pipes 5324, and the fourth guide pipe 5325 is located between the first diversion sleeve 5313 and the air guide pipe 5311. The first guide pipe 5321, the second guide pipe 5323, the third guide pipe 5324, and the fourth guide pipe 5325 are all provided on one side. Multiple sets of circumferentially arrayed heat exchange pipes 5326 are also connected between 25. By setting graded heat conduction pipes 532 inside the waste heat recovery tank 53, including two sets of first guide pipes 5321 and their interconnected second guide pipes 5323, third guide pipes 5324 and fourth guide pipes 5325, the flue gas can be guided to pass through the heat conduction pipes of each level along the multi-level flow channel, realizing the graded flow of flue gas inside the waste heat recovery tank 53. By arranging multiple sets of circumferentially arrayed heat exchange pipes 5326 between the guide pipes of each level, the contact area and heat exchange efficiency between the flue gas and the internal cold water can be enhanced, realizing the full transfer of heat from the flue gas to the cold water. By coordinating the combination of the guide pipes of each level and the heat exchange pipes 5326 with the sleeve structure, the high-temperature flue gas can be evenly distributed and fully release heat during the flow process, realizing the efficient recovery and utilization of waste heat, while reducing the exhaust temperature, avoiding energy waste and reducing environmental thermal pollution.

[0030] Working Principle: The exhaust waste heat treatment device designed in this scheme mainly consists of a supporting base plate 1, a first transmission box 2, a second transmission box 3, a drive motor 4, and an exhaust treatment component 5. The exhaust treatment component 5 includes a flue gas purification tank 51, an inlet pipe 52, a waste heat recovery tank 53, a gas supply pipe 54, and an exhaust pipe 55. When the drive motor 4 installed at the bottom of the second transmission box 3 is powered on, its output end drives the second transmission shaft 31 to rotate through the transmission connection. The second transmission shaft 31 is connected to the spiral blades 5312 set at the bottom of the waste heat recovery tank 53 via a connecting flange 33. After the drive motor 4 runs, it drives the spiral blades 5312 to rotate counterclockwise, which can form an effective airflow suction effect. The high-temperature waste gas in the flue gas purification tank 51 can be drawn into the waste heat recovery tank 53 through the inlet pipe 52 and the gas guide pipe 5311. This structure can significantly improve the flow efficiency of flue gas inside the exhaust treatment component 5, providing a stable airflow power foundation for subsequent heat exchange.

[0031] The exhaust waste heat treatment device designed in this scheme achieves synchronous drive through a multi-stage transmission mechanism set inside the first transmission box 2 and the second transmission box 3. The second transmission shaft 31 is meshed with the second bevel gear 32 and matched with the first bevel gear 7 on the first transmission shaft 6, forming a highly efficient power linkage structure. When the drive motor 4 is powered on, it can not only drive the spiral blade 5312 to achieve the air extraction function, but also drive the second transmission shaft 31 in the first transmission box 2 to rotate. The second transmission shaft 31 is connected to the third transmission shaft 515 through the connecting flange 33, thereby driving the third transmission shaft 515 located inside the flue gas purification tank 51 to rotate. Through the first scraper 516 installed at its end and the bottom of the impurity filter screen 513 in contact, it can automatically scrape off the attached soot and dust impurities. The impurity filter screen 513 is elastically supported by the metal mounting ring 511 and the compression spring 514, so that it keeps in close contact with the first scraper 516, effectively improving the cleaning effect, avoiding clogging, and ensuring smooth flue gas flow and stable purification efficiency.

[0032] The exhaust waste heat treatment device designed in this scheme adds an auxiliary transmission cover 517 in the middle of the third transmission shaft 515 to protect and hide the third bevel gear 5151. A second scraper 5171 and a fourth bevel gear 5172 are set on one side of the auxiliary transmission cover 517, and the fourth bevel gear 5172 meshes with the third bevel gear 5151. When the third transmission shaft 515 rotates, it can also drive the second scraper 5171 to rotate along the inner wall of the air intake pipe 52, which can realize the automatic scraping and cleaning of smoke and dust on the pipe wall of the air intake pipe 52, effectively preventing airflow blockage caused by dust accumulation.

[0033] The exhaust waste heat treatment device designed in this scheme utilizes a multi-stage heat-conducting cavity 531 and multi-stage heat-conducting pipes 532 set inside the waste heat recovery tank 53. The multi-stage heat-conducting cavity 531 forms a multi-stage flow channel through a structure including a gas guide pipe 5311, a first diversion sleeve 5313, a second diversion sleeve 5314, and a guide port 5315, allowing the high-temperature flue gas to pass through each stage of heat-conducting area in sequence. The multi-stage heat-conducting pipes 532 consist of a first guide pipe 5321, a second guide pipe 5323, a third guide pipe 5324, a fourth guide pipe 5325, and a ring-shaped heat exchange pipeline 5326, enabling multi-level heat exchange between the flue gas and the cold water flowing inside. When the high-temperature flue gas passes through the multi-stage heat-conducting structure, the heat can be efficiently transferred to the cold water inside the pipe, realizing the reuse of the waste heat of the flue gas. At the same time, the exhaust flue gas is significantly cooled after multi-stage heat exchange, avoiding the direct discharge of high-temperature flue gas, which would cause energy waste and environmental thermal pollution.

[0034] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are 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 device for recovering waste heat from industrial heat treatment flue gas, comprising a supporting base plate (1), characterized in that: The top of the support base plate (1) is equipped with a first transmission box (2), a second transmission box (3) is provided on one side of the first transmission box (2), a drive motor (4) is installed at the bottom of the second transmission box (3), and a smoke exhaust treatment component (5) is also installed on the top of the first transmission box (2) and the second transmission box (3). The exhaust gas treatment assembly (5) includes a flue gas purification tank (51), which is installed on the top of the first transmission box (2). An air inlet pipe (52) is connected to the bottom of one side of the flue gas purification tank (51). A waste heat recovery tank (53) is provided on the side of the flue gas purification tank (51) away from the air inlet pipe (52). The waste heat recovery tank (53) is connected to the top of the second transmission box (3). A gas supply pipe (54) is connected between the top of the waste heat recovery tank (53) and the top of the flue gas purification tank (51). An exhaust pipe (55) is also connected to the top of the waste heat recovery tank (53).

2. The device for recovering waste heat from industrial heat treatment flue gas according to claim 1, characterized in that: The second transmission box (3) and the first transmission box (2) are connected by a first transmission shaft (6) through a bearing, and the two ends of the first transmission shaft (6) are respectively equipped with a first bevel gear (7).

3. The device for recovering waste heat from industrial heat treatment flue gas according to claim 2, characterized in that: The first transmission box (2) and the second transmission box (3) are both connected to a second transmission shaft (31) through bearings. One set of the second transmission shafts (31) is connected to the output end of the drive motor (4). One end of the second transmission shaft (31) is connected to a second bevel gear (32).

4. The device for recovering waste heat from industrial heat treatment flue gas according to claim 3, characterized in that: The second bevel gear (32) is structurally matched with the first bevel gear (7), and the second bevel gear (32) and the first bevel gear (7) are meshed.

5. The device for recovering waste heat from industrial heat treatment flue gas according to claim 4, characterized in that: The flue gas purification tank (51) is internally fixedly connected to a metal mounting ring (511). Multiple sets of connecting rods (512) are slidably connected around the metal mounting ring (511). Impurity filter screens (513) are fixedly connected between one end of each set of connecting rods (512). Compression springs (514) are sleeved in the middle of each set of connecting rods (512). The bottom of the flue gas purification tank (51) is connected to a third drive shaft (515) via a bearing. The third drive shaft (515) is connected to a second drive shaft (31) via a connecting flange (33). A first scraper plate (516) is installed at one end of the third drive shaft (515). The first scraper plate (516) is in contact with the bottom of the impurity filter screen (513). An auxiliary drive cover (517) is connected to the middle of the third drive shaft (515) via a bearing. A fixing rod (518) is also fixedly connected between the auxiliary drive cover (517) and the inner side of the flue gas purification tank (51).

6. The device for recovering waste heat from industrial heat treatment flue gas according to claim 5, characterized in that: A third bevel gear (5151) is installed in the middle of the third drive shaft (515). The third bevel gear (5151) is located inside the auxiliary drive cover (517). A second scraper (5171) is connected to one side of the auxiliary drive cover (517) via a bearing. The second scraper (5171) is in contact with the wall of the air intake pipe (52). A fourth bevel gear (5172) is also installed at one end of the second scraper (5171).

7. The device for recovering waste heat from industrial heat treatment flue gas according to claim 6, characterized in that: The fourth bevel gear (5172) is structurally matched with the third bevel gear (5151), and the fourth bevel gear (5172) and the third bevel gear (5151) are meshed together.

8. The device for recovering waste heat from industrial heat treatment flue gas according to claim 1, characterized in that: The waste heat recovery tank (53) is provided with a graded heat conduction cavity (531) inside, and the waste heat recovery tank (53) is also provided with a graded heat conduction pipe fitting (532) inside.

9. The device for recovering waste heat from industrial heat treatment flue gas according to claim 8, characterized in that: The graded heat-conducting cavity (531) includes a gas guide pipe (5311), which is connected to the gas supply pipeline (54) in a continuous manner. A spiral blade (5312) is provided at the bottom of the gas guide pipe (5311). The spiral blade (5312) is connected to the bottom of the waste heat recovery tank (53) via a bearing. The spiral blade (5312) is connected to the second drive shaft (31) via a connecting flange (33). A first diversion sleeve (5313) is provided on the outside of the first diversion sleeve (5313), and a second diversion sleeve (5314) is also provided on the outside of the first diversion sleeve (5313). The second diversion sleeve (5314) is fixed on the top of the gas guide pipe (5311). A guide port (5315) is also provided between the first diversion sleeve (5313), the second diversion sleeve (5314), and the waste heat recovery tank (53).

10. The apparatus for recovering waste heat from industrial heat treatment flue gas according to claim 9, characterized in that: The graded heat-conducting pipe fitting (532) includes two sets of first guide pipes (5321). Both sets of first guide pipes (5321) are located at both ends of the outer side of the waste heat recovery tank (53). One side of each set of first guide pipes (5321) is connected to an inlet / outlet pipe (5322). A second guide pipe (5323) is located on one side of each set of first guide pipes (5321). The second guide pipe (5323) is located between the waste heat recovery tank (53) and the second diversion sleeve (5314). A third guide pipe (5323) is located on one side of each set of second guide pipes (5323). 324), the third guide pipe (5324) is disposed between the second branch sleeve (5314) and the first branch sleeve (5313), and a fourth guide pipe (5325) is disposed on one side of the two sets of third guide pipes (5324). The fourth guide pipe (5325) is disposed between the first branch sleeve (5313) and the gas guide pipe (5311). Multiple sets of heat exchange pipes (5326) distributed in a circumferential array are also connected between the first guide pipe (5321), the second guide pipe (5323), the third guide pipe (5324), and the fourth guide pipe (5325).

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