A drying tower tail gas waste heat recovery device with tail gas purification function

Abstract

This invention relates to the field of flue gas treatment technology for drying towers, specifically to a waste heat recovery device for drying tower exhaust gas with exhaust gas purification function. The device includes a modular cylinder and a connecting box. An extension section is fixedly connected to the top of the modular cylinder, and a heat recovery component and an isolation component are installed on the inner side of the modular cylinder. The bottom of the modular cylinder is fixedly connected to the top of the connecting box. In this waste heat recovery device, when the flue gas ascends through the connecting box into the heat recovery component, it rises along the inner side of the modular cylinder and is guided upon contact with the spiral blades, ensuring full contact with the heat exchange tubes in the evaporation section and significantly extending the flue gas residence time. Because the heat exchange tubes in the evaporation section are designed in an arc-shaped, flat shape, they have a large contact area with the flue gas while matching the shape of the spiral blades, enabling efficient heat exchange.

Description

Technical Field

[0001] This invention relates to the field of drying tower flue gas treatment technology, specifically to a drying tower exhaust gas waste heat recovery device with exhaust gas purification function. Background Technology

[0002] In existing technologies, the exhaust gas from drying towers typically employs a multi-stage combined process. It first undergoes purification via bag filters, wet electrostatic precipitators, or scrubbing towers. High-concentration organic waste gas also requires incineration. Simultaneously, waste heat is recovered through heat pipes or plate heat exchangers, heat pump condensation, or exhaust gas recirculation. In some cases, condensation reheating is also necessary to achieve flue gas whitening. However, emissions during the process still... When the heat is too high to meet the required emission standards, or when small drying tower equipment is difficult to connect to a large-scale flue gas treatment system, the treatment of exhaust gas becomes quite inconvenient.

[0003] Based on the problems mentioned above, we propose a waste heat recovery device for dryer exhaust gas with exhaust gas purification function. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a waste heat recovery device for dry tower exhaust gas with exhaust gas purification function. It has the advantages of being directly and modularly installed in flue gas emission or flue gas treatment pipelines to flexibly perform preliminary flue gas treatment and heat exchange, or connected in series in the flue gas pipeline of the flue gas treatment system to improve the cooling effect and reduce the possibility of flue gas adhering to the surface of the structure.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A waste heat recovery device for exhaust gas from a drying tower with exhaust gas purification function includes a modular cylinder and a connecting box. An extension section is fixedly connected to the top of the modular cylinder, and a heat recovery component and an isolation component are installed on the inner side of the modular cylinder. The bottom of the modular cylinder is fixedly connected to the top of the connecting box. The heat recovery assembly includes a sliding shaft and four mounting brackets. A lifting spring is fixedly connected to the top of the mounting brackets, and a sliding cylinder is fixedly connected to the top of the lifting springs. The inner side of the sliding cylinder is slidably connected to the sliding shaft, and a spiral blade is fixedly connected to the outer side of the sliding cylinder. Four contact blocks that cooperate with the sliding cylinder are fixedly connected to the outer side of the sliding shaft. The outer side of the mounting brackets is fixedly connected to the module cylinder. An evaporation section heat exchange tube is provided between each of the four spiral blades. The left side of the evaporation section heat exchange tube passes through the module cylinder and is fixedly connected to the module cylinder. The inner side of the module cylinder is rotatably connected to a rotating shaft, and the outer side of the rotating shaft is fixedly connected to a striking wheel. The outer side of the striking wheel is provided with an integrally formed striking protrusion. The inner side of the module cylinder is movably connected to a shaft bracket, the inner side of the shaft bracket is fixedly connected to a sliding shaft, and the rear side of the shaft bracket is fixedly connected to a receiving frame.

[0006] Using the above technical solution, a modular cylinder with a connecting box is installed. The connecting box connects to the front end of the exhaust gas pipeline and, through an extension section, connects to subsequent flue gas equipment or pipelines. When the flue gas rises through the connecting box and enters the heat recovery assembly, it rises along the inner side of the modular cylinder and is guided upon contact with the spiral blades, ensuring full contact with the evaporation section heat exchange tubes and significantly extending the flue gas residence time. Because the evaporation section heat exchange tubes are designed in an arc-shaped, flat form, they have a large contact area with the flue gas while matching the shape of the spiral blades, allowing for more effective heat exchange. During the flue gas passage process, due to... The airflow velocity is slowest at the root of the spiral blade, where dust is most easily deposited. At the same time, there is almost no wind scouring in the vortex area on the back, making it easy for dust to adhere firmly. The periodic rotation of the shaft causes the striking protrusion on the outside of the striking wheel to strike the impact frame on the back of the shaft bracket. After being struck, the impact frame and the shaft bracket vibrate and displace along the vertical direction together with the slide shaft. The contact block located on the outside of the slide shaft strikes the slide cylinder when it falls, transmitting the vibration to the spiral blade and causing impurities attached to its surface to fall off to avoid adhesion. The slide cylinder also displaces along the lifting spring, which also provides a certain degree of protection and reduces the possibility of deformation from being struck.

[0007] The present invention is further configured such that: a mounting bracket is fixedly connected to the outer side of the module cylinder, a servo motor is fixedly connected to the right side of the top of the mounting bracket, and the output end of the servo motor is fixedly connected to the right side of the rotating shaft.

[0008] Using the above technical solution, a mounting bracket is set up to mount the servo motor on the outside of the module cylinder. The servo motor is used to drive the rotating shaft to provide power.

[0009] The present invention is further configured such that: a fixing box is fixedly connected to the inner wall of the module cylinder, the inner side of the fixing box is slidably connected to the shaft frame, and a return spring is fixedly connected to the bottom of the inner side of the fixing box, and the bottom of the return spring is fixedly connected to the fixing box.

[0010] By adopting the above technical solution, a fixed box is set up in conjunction with a return spring to support the initial position of the shaft bracket. When the shaft bracket is impacted and displaced, it falls. At this time, the return spring will also be compressed and deformed and spring back to its original position, so as to facilitate continuous operation.

[0011] The present invention is further configured such that: the isolation component includes a tray-dropping section and a spraying section; The dropping plate section includes an outer edge plate, a hollow frame is fixedly connected to the inner side of the outer edge plate, an inverted plate is fixedly connected to the top of the hollow frame, and an integrally formed narrow water trough is provided at the bottom of the outer edge plate. A U-shaped tube is fixedly connected to the bottom of the narrow water trough, and the left side of the U-shaped tube passes through the module cylinder and is fixedly connected to the module cylinder.

[0012] By adopting the above technical solution, the drop plate section and the spray section are set up in combination. The spray section continuously sprays cooling water. When the exhaust gas passes through the inner side of the outer edge plate and continues to rise along the inverted plate, it will fully come into contact with the water and be adsorbed by some impurities, thus achieving a good cooling effect. The inverted plate can also effectively prevent the water from falling directly to the bottom structure, which would cause impurities to adhere to the structure and be difficult to clean. After flowing along the narrow water channel, the water is discharged through the U-shaped pipe for unified collection and treatment. The water in the U-shaped pipe can prevent the exhaust gas from gushing out from the U-shaped pipe.

[0013] The present invention is further configured such that: the spraying part includes a pipe frame, a distribution pipe is fixedly connected to the inner side of the pipe frame, the left side of the distribution pipe passes through the module cylinder and is fixedly connected to the module cylinder, the distribution pipe is externally connected to a liquid supply system, and a spray head is fixedly connected to the bottom of the distribution pipe.

[0014] Using the above technical solution, a pipe rack is set up to install a distribution pipe inside the module cylinder, and a spray head at the bottom of the distribution pipe is used to spray cooling water evenly so that it can fully contact the exhaust gas.

[0015] The present invention is further configured such that: the connecting box includes a conical cylinder, a flue gas exhaust pipe is installed on the top of the conical cylinder, the top of the flue gas exhaust pipe is fixedly connected to the bottom of the module cylinder, a flue gas inlet pipe is fixedly connected to the top of the outer side of the conical cylinder, and an ash discharge valve is fixedly connected to the bottom of the conical cylinder.

[0016] Using the above technical solution, by setting up a conical cylinder, after the exhaust gas enters the inside of the conical cylinder along the flue gas inlet pipe, the dust-laden flue gas cuts in from the side, rotates at high speed and moves towards the bottom, while the outer ring airflow is rich in dust and flows downward along the wall, while the inner ring airflow with less dust rises from the flue gas exhaust pipe to the module cylinder for further processing. The impurities that fall in the heat exchange area will also slide down along the flue gas exhaust pipe to the position of the ash discharge valve for unified discharge.

[0017] The invention is further configured such that: an integrally formed isolation protrusion is provided on the inner side of the extension section, a pressure ring is provided on the inner side of the extension section, the pressure ring is installed on the inner side of the extension section by bolts, and a gathering piece is provided between the pressure ring and the extension section, the gathering piece being made of high-temperature resistant fluororubber cloth material.

[0018] By adopting the above technical solution and setting a pressure ring, it is easy to press the bottom of the gathering plate against the bottom to fix it. The gathering plate is used to block and guide the rising exhaust gas.

[0019] The invention is further configured such that: six hooks are provided on the outer side of the gathering piece, a support rod is movably connected to the outer side of the hooks, the bottom of the support rod is rotatably connected to the bottom of the inner side of the extension section, and a flue pipe is fixedly connected to the top of the extension section.

[0020] By adopting the above technical solution, hooks are set to connect the support rods. When the support rods move closer or further apart, the opening at the top of the flexible gathering plate can be reduced or expanded. When the exhaust gas volume is small and the pressure is insufficient, or when the exhaust volume is large and the processing pressure is high, the outlet cross-sectional size at the top of the gathering plate can be controlled to control the flue gas velocity, thereby directly adjusting the residence time of the flue gas in the pipe section. During the expansion or contraction of the gathering plate, it will fold or bend to varying degrees to facilitate the falling of impurities. Compared with the rigid louver structure, it is easier to clean and can be replaced at a lower cost during maintenance.

[0021] The present invention is further configured such that: a synchronization ring is provided on the outer side of the receiving plate, and a slant frame is rotatably connected to the bottom of the synchronization ring, and the bottom of the slant frame is rotatably connected to the support rod.

[0022] By adopting the above technical solution, and by setting up a synchronous ring in conjunction with the inclined frame, the inclined frame can pull the support rod to move closer or further away synchronously during ascent or descent, thereby achieving the effect of adjusting the gathering plate.

[0023] The present invention is further configured such that: an electric cylinder is fixedly connected to the bottom of the extension section, and the telescopic end of the electric cylinder passes through the extension section and is fixedly connected to the bottom of the synchronization ring.

[0024] Using the above technical solution, an electric cylinder is installed to push and pull the synchronous ring on the outside of the extension section to perform lifting and lowering actions.

[0025] Compared with the prior art, the present invention has the following beneficial effects: This waste heat recovery device for dryer towers with exhaust gas purification function uses a modular cylinder with a connecting box. The connecting box connects to the front end of the exhaust gas pipeline and, through an extension section, connects to subsequent flue gas equipment or pipelines. When the flue gas rises through the connecting box and enters the heat recovery component, it rises along the inner side of the modular cylinder and is guided upon contact with the spiral blades, ensuring full contact with the heat exchange tubes in the evaporation section and significantly extending the flue gas residence time. Because the heat exchange tubes in the evaporation section are designed with an arc-shaped flat shape, they have a large contact area with the flue gas while matching the shape of the spiral blades, allowing for more effective heat exchange. During the process, the airflow velocity is slowest at the root of the spiral blade, where dust is most easily deposited. At the same time, there is almost no wind scouring in the vortex area on the back, so dust easily adheres firmly. The periodic rotation of the shaft causes the striking protrusion on the outside of the striking wheel to strike the impact frame on the back of the shaft bracket. After being struck, the impact frame and the shaft bracket will vibrate and displace along the vertical direction together with the sliding shaft. The contact block located on the outside of the sliding shaft will strike the sliding cylinder when it falls, so as to transmit the vibration to the spiral blade and make the impurities attached to its surface fall off to avoid adhesion. The sliding cylinder also has a certain protective effect by displacing along the lifting spring, reducing the possibility of being deformed by the impact. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the main body in this invention; Figure 3 This is a schematic diagram of the extension section in this invention; Figure 4 This is a schematic diagram of the isolation component in this invention; Figure 5 This is a schematic diagram of the heat recovery component in this invention; Figure 6 This is a front sectional view of the modular cylinder structure in this invention; Figure 7 This is a schematic diagram of the mounting bracket connection in this invention; Figure 8 For the present invention Figure 5 A magnified view of a portion of point A in the middle.

[0027] In the diagram: 1. Module cylinder; 2. Connecting box; 201. Conical cylinder; 202. Flue gas exhaust pipe; 203. Flue gas inlet pipe; 204. Ash discharge valve; 3. Extension section; 4. Heat recovery assembly; 41. Sliding shaft; 42. Assembly frame; 43. Lifting spring; 44. Sliding cylinder; 45. Spiral blade; 46. Contact block; 47. Evaporation section heat exchange tube; 5. Isolation assembly; 51. Drop plate section; 511. Outer edge plate; 512. Hollow frame; 513. Inverted 514. Narrow water tank; 515. U-shaped pipe; 52. Spraying section; 521. Pipe rack; 522. Distribution pipe; 6. Rotating shaft; 7. Impact wheel; 8. Striking protrusion; 9. Shaft bracket; 10. Impact frame; 11. Mounting bracket; 12. Servo motor; 13. Fixing box; 14. Return spring; 15. Pressure ring; 16. Gathering plate; 17. Hook; 18. Support rod; 19. Flue pipe; 20. Synchronization ring; 21. Inclined frame; 22. Electric cylinder. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1 Please see Figure 1-8A waste heat recovery device for exhaust gas from a drying tower with exhaust gas purification function includes a modular cylinder 1 and a connecting box 2. An extension section 3 is fixedly connected to the top of the modular cylinder 1. A heat recovery component 4 and an isolation component 5 are installed on the inner side of the modular cylinder 1. The bottom of the modular cylinder 1 is fixedly connected to the top of the connecting box 2. The heat recovery assembly 4 includes a sliding shaft 41 and four assembly frames 42. A lifting spring 43 is fixedly connected to the top of the assembly frame 42. A sliding cylinder 44 is fixedly connected to the top of the lifting spring 43. The inner side of the sliding cylinder 44 is slidably connected to the sliding shaft 41. A spiral blade 45 is fixedly connected to the outer side of the sliding cylinder 44. Four contact blocks 46 that cooperate with the sliding cylinder 44 are fixedly connected to the outer side of the sliding shaft 41. The outer side of the assembly frame 42 is fixedly connected to the module cylinder 1. An evaporation section heat exchange tube 47 is provided between the four spiral blades 45. The left side of the evaporation section heat exchange tube 47 passes through the module cylinder 1 and is fixedly connected to the module cylinder 1. A rotating shaft 6 is rotatably connected to the inner side of the module cylinder 1, and a striking wheel 7 is fixedly connected to the outer side of the rotating shaft 6. An integrally formed striking protrusion 8 is provided on the outer side of the striking wheel 7. A shaft frame 9 is movably connected to the inner side of the module cylinder 1. The inner side of the shaft frame 9 is fixedly connected to the sliding shaft 41, and a receiving frame 10 is fixedly connected to the rear side of the shaft frame 9. By setting up a modular cylinder 1 in conjunction with a connecting box 2, which connects to the front end of the exhaust gas pipeline and, through an extension section 3, connects to subsequent flue gas equipment or pipelines, when the flue gas rises through the connecting box 2 and enters the heat recovery assembly 4, it will rise along the inner side of the modular cylinder 1 and be guided upon contact with the spiral blade 45, ensuring full contact with the evaporation section heat exchange tube 47 and significantly extending the flue gas residence time. Because the evaporation section heat exchange tube 47 is designed as an arc-shaped flat tube, it has a large contact area with the flue gas while matching the shape of the spiral blade 45, allowing for more effective heat exchange. During the flue gas passage, the airflow is directed towards the spiral blade 45... The flow velocity is slowest at the blade root, where dust is most likely to accumulate. At the same time, there is almost no wind scouring in the vortex area on the back, making it easy for dust to adhere firmly. The periodic rotation of the shaft 6 causes the striking protrusion 8 on the outside of the striking wheel 7 to strike the impact frame 10 on the back of the shaft frame 9. After being struck, the impact frame 10 and the shaft frame 9 will vibrate and displace along the vertical direction together with the sliding shaft 41. The contact block 46 located on the outside of the sliding shaft 41 will strike the slide cylinder 44 when it falls, so as to transmit the vibration to the spiral blade 45, causing the impurities attached to its surface to fall off to avoid adhesion. The slide cylinder 44 also has a certain protective effect by displacing along the lifting spring 43, reducing the possibility of deformation from being struck.

[0030] The module cylinder 1 is fixedly connected to the outer side of the module cylinder 1. The top right side of the mounting bracket 11 is fixedly connected to the servo motor 12. The output end of the servo motor 12 is fixedly connected to the right side of the rotating shaft 6. The mounting bracket 11 is used to install the servo motor 12 on the outer side of the module cylinder 1. The servo motor 12 is used to drive the rotating shaft 6 to rotate to provide power. The inner wall of the module cylinder 1 is fixedly connected to the fixing box 13. The inner side of the fixing box 13 is slidably connected to the shaft frame 9. The bottom of the inner side of the fixing box 13 is fixedly connected to the return spring 14. The bottom of the return spring 14 is fixedly connected to the fixing box 13. The fixing box 13 and the return spring 14 are used to support the initial position of the shaft frame 9. When the shaft frame 9 is impacted and displaced, it falls. At this time, the return spring 14 will also be compressed and deformed and rebound to reset, so as to facilitate continuous operation. The isolation component 5 includes a drop plate part 51 and a spraying part 52.The dropping plate section 51 includes an outer edge plate 511. A perforated frame 512 is fixedly connected to the inner side of the outer edge plate 511. An inverted plate 513 is fixedly connected to the top of the perforated frame 512. An integrally formed narrow water trough 514 is provided at the bottom of the outer edge plate 511. A U-shaped pipe 515 is fixedly connected to the bottom of the narrow water trough 514. The left side of the U-shaped pipe 515 passes through the module cylinder 1 and is fixedly connected to the module cylinder 1. By setting the dropping plate section 51 and the spraying section 52 in cooperation, the spraying section 52 continuously sprays cooling water. When the exhaust gas passes through the inner side of the outer edge plate 511 and along the inverted plate 513, the cooling water is sprayed. As the water continues to rise, it will come into full contact with the water and absorb some impurities, while also providing a good cooling effect. The inverted plate 513 can also effectively prevent water from falling directly onto the bottom structure, causing impurities to adhere to the structure and become difficult to clean. After flowing along the narrow water trough 514, the water is discharged along the U-shaped pipe 515 for unified collection and treatment. Water is always retained in the U-shaped pipe 515 to prevent exhaust gas from gushing out from it. The spraying section 52 includes a pipe frame 521, and a distribution pipe 522 is fixedly connected to the inner side of the pipe frame 521. The distribution pipe 522... A distribution pipe 522 is connected to a liquid supply system externally. A spray head is fixedly connected to the bottom of the distribution pipe 522. A pipe bracket 521 is used to install the distribution pipe 522 inside the module cylinder 1. The spray head at the bottom of the distribution pipe 522 is used to evenly spray cooling water to ensure sufficient contact with the exhaust gas. The connecting box 2 includes a conical cylinder 201. A flue gas exhaust pipe 202 is installed on the top of the conical cylinder 201. The top of the flue gas exhaust pipe 202 is fixedly connected to the bottom of the module cylinder 1. The top of the outer side of the conical cylinder 201 is fixedly... A flue gas inlet pipe 203 is connected to the cone 201, and an ash discharge valve 204 is fixedly connected to the bottom of the cone 201. By setting up the cone 201, after the exhaust gas enters the cone 201 along the flue gas inlet pipe 203, the dust-laden flue gas cuts in from the side, rotates at high speed, and moves towards the bottom. The outer ring airflow, rich in dust, flows downwards along the wall, while the inner ring airflow, with less dust, rises from the flue gas outlet pipe 202 to the module cylinder 1 for further processing. Impurities falling in the heat exchange area also slide down the flue gas outlet pipe 202 to the ash discharge valve 204 for unified discharge.

[0031] The working principle of this embodiment is as follows: The exhaust gas from the drying tower enters the conical cylinder 201 tangentially from the flue gas inlet pipe 203 of the connecting box 2, forming a swirling flow to achieve pre-dust removal. The outer ring of high-dust airflow falls along the wall, while the inner ring of airflow rises through the flue gas exhaust pipe 202 and enters the module cylinder 1. The airflow spirals upward along the spiral blade 45 and fully contacts the arc-shaped flat evaporation section heat exchange tube 47, significantly extending the heat exchange path to efficiently recover the waste heat of the exhaust gas. The servo motor 12 drives the impeller 7 to rotate periodically, striking the protrusion 8 to hit the impact frame 10. This causes the shaft frame 9 and the sliding shaft 41 to vibrate up and down. The contact block 46 strikes the sliding cylinder 44, causing the spiral blade 45 to vibrate and remove dust. The lifting spring 43 and the return spring 14 work together to buffer and reset, preventing dust from sticking to the surface of the spiral blade 45. At the same time, the distribution pipe 522 of the isolation component 5 sprays washing liquid downwards. The exhaust gas and the sprayed liquid come into countercurrent contact to complete the cooling, dust removal and purification. The washing water is discharged through the narrow water tank 514 and the loop pipe 515 water seal. The dust from heat exchange and swirling is finally discharged by the ash discharge valve 204.

[0032] Example 2 refer to Figure 1-4 A waste heat recovery device for exhaust gas from a drying tower with exhaust gas purification function also includes an extension section 3. An integrally formed isolation protrusion is provided on the inner side of the extension section 3. A pressure ring 15 is provided on the inner side of the extension section 3. The pressure ring 15 is installed on the inner side of the extension section 3 by bolts. A gathering piece 16 is provided between the pressure ring 15 and the extension section 3. The gathering piece 16 is made of high-temperature resistant fluororubber cloth material. By setting the pressure ring 15, it is easy to press the bottom of the gathering piece 16 to the bottom to fix it. The gathering piece 16 is used to block and guide the rising exhaust gas.

[0033] The converging plate 16 has six hooks 17 on its outer side, and a support rod 18 is movably connected to the outer side of each hook 17. The bottom of the support rod 18 is rotatably connected to the bottom of the inner side of the extension section 3, and the top of the extension section 3 is fixedly connected to the flue pipe 19. By setting the hooks 17 to connect the support rod 18, the opening at the top of the flexible converging plate 16 can be reduced or expanded when the support rods 18 move closer or further apart. When the exhaust gas volume is small and the pressure is insufficient, or when the exhaust volume is large and the processing pressure is high, the outlet cross-sectional size at the top of the converging plate 16 can be controlled to control the flue gas flow rate, thereby directly adjusting the residence time of the flue gas in the pipe section. During the expansion or contraction of the converging plate 16, it will undergo different degrees of bending. The folding or bending mechanism facilitates the falling of impurities, making cleaning easier compared to a rigid louver structure. It also allows for replacement during maintenance at a lower cost. A synchronization ring 20 is provided on the outer side of the gathering plate 16. A slant frame 21 is rotatably connected to the bottom of the synchronization ring 20. The bottom of the slant frame 21 is rotatably connected to the support rod 18. By setting the synchronization ring 20 in conjunction with the slant frame 21, the support rod 18 can be pulled synchronously closer or further away by the slant frame 21 during ascent or descent, thereby adjusting the gathering plate 16. An electric cylinder 22 is fixedly connected to the bottom of the extension section 3. The telescopic end of the electric cylinder 22 passes through the extension section 3 and is fixedly connected to the bottom of the synchronization ring 20. The electric cylinder 22 is used to push and pull the synchronization ring 20 on the outer side of the extension section 3 to perform lifting and lowering actions.

[0034] The working principle of this embodiment is as follows: The electric cylinder 22 extends and retracts to drive the synchronous ring 20 to rise and fall. Through the linkage of the inclined frame 21, multiple support rods 18 swing synchronously, which drives the high-temperature resistant fluororubber cloth material gathering plate 16 to retract or expand, adjusting the cross-sectional size of the top exhaust gas outlet. When the exhaust gas volume is small and the pressure is insufficient, the outlet is narrowed to increase the flow rate. When the volume is large and the processing load is high, the outlet is expanded to reduce the flow rate, thereby accurately controlling the residence time of the exhaust gas in the device and adapting to different working conditions. During the opening and closing deformation process, the gathering plate 16 will fold and bend, automatically shaking off the dust attached to the surface, avoiding the accumulation of dust and material blockage in the rigid structure. Finally, the treated exhaust gas is stably discharged through the flue pipe 19.

[0035] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. Those skilled in the art can make modifications to this embodiment without contributing any inventive step after reading this specification. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for dry tower exhaust gas with exhaust gas purification function, comprising a modular cylinder (1), characterized in that, Also includes: Heat recovery assembly (4) and isolation assembly (5) installed inside the module cylinder (1); The heat recovery assembly (4) includes a sliding shaft (41) arranged along the axial direction of the module cylinder (1), a sliding cylinder (44) that can slide along the sliding shaft (41), a spiral blade (45) fixed to the outside of the sliding cylinder (44), and an evaporation section heat exchange tube (47) arranged between the spiral blades (45). The inner side of the module cylinder (1) is also rotatably connected to a rotating shaft (6), and a striking wheel (7) is fixed on the rotating shaft (6). A striking protrusion (8) is provided on the outer side of the striking wheel (7). The sliding shaft (41) is fixedly connected to the impact frame (10) via the shaft bracket (9), and the impact frame (10) is located on the movement path of the striking protrusion (8); wherein, the top of the module cylinder (1) is provided with an extension section (3), and the bottom is fixedly connected with a connecting box (2), and the module cylinder (1) is modularly connected in series in the flue gas emission or treatment pipeline through the connecting box (2) and the extension section (3).

2. The waste heat recovery device for dryer exhaust gas with exhaust gas purification function according to claim 1, characterized in that: A mounting bracket (11) is fixedly connected to the outer side of the module cylinder (1). A servo motor (12) is fixedly connected to the right side of the top of the mounting bracket (11). The output end of the servo motor (12) is fixedly connected to the right side of the rotating shaft (6). The bottom of the module cylinder (1) is fixedly connected to the top of the connecting box (2). The heat recovery assembly (4) includes a sliding shaft (41) and four assembly brackets (42). A lifting spring (43) is fixedly connected to the top of the assembly bracket (42). A sliding cylinder (44) is fixedly connected to the top of the lifting spring (43). Four contact blocks (46) that cooperate with the sliding cylinder (44) are fixedly connected to the outer side of the sliding shaft (41). The outer side of the assembly bracket (42) is fixedly connected to the module cylinder (1). The left side of the evaporation section heat exchange tube (47) passes through the module cylinder (1) and is fixedly connected to the module cylinder (1). A shaft bracket (9) is movably connected to the inner side of the module cylinder (1). A hit frame (10) is fixedly connected to the rear side of the shaft bracket (9).

3. The waste heat recovery device for dryer exhaust gas with exhaust gas purification function according to claim 1, characterized in that: The inner wall of the module cylinder (1) is fixedly connected to a fixing box (13), the inner side of the fixing box (13) is slidably connected to the shaft frame (9), the bottom of the inner side of the fixing box (13) is fixedly connected to a reset spring (14), and the top of the reset spring (14) is fixedly connected to the shaft frame (9).

4. The waste heat recovery device for dryer exhaust gas with exhaust gas purification function according to claim 1, characterized in that: The isolation component (5) includes a tray section (51) and a spray section (52); The tray section (51) includes an outer edge plate (511), a hollow frame (512) is fixedly connected to the inner side of the outer edge plate (511), an inverted plate (513) is fixedly connected to the top of the hollow frame (512), an integrally formed narrow water trough (514) is provided at the bottom of the outer edge plate (511), a U-shaped tube (515) is fixedly connected to the bottom of the narrow water trough (514), and the left side of the U-shaped tube (515) passes through the module cylinder (1) and is fixedly connected to the module cylinder (1).

5. A waste heat recovery device for dryer exhaust gas with exhaust gas purification function according to claim 4, characterized in that: The spraying section (52) includes a pipe rack (521), a distribution pipe (522) is fixedly connected to the inner side of the pipe rack (521), the left side of the distribution pipe (522) passes through the module cylinder (1) and is fixedly connected to the module cylinder (1), the distribution pipe (522) is connected to the external liquid supply system, and a spray head is fixedly connected to the bottom of the distribution pipe (522).

6. A waste heat recovery device for dryer exhaust gas with exhaust gas purification function according to claim 1, characterized in that: The connecting box (2) includes a conical cylinder (201), a flue gas exhaust pipe (202) is installed on the top of the conical cylinder (201), the top of the flue gas exhaust pipe (202) is fixedly connected to the bottom of the module cylinder (1), a flue gas inlet pipe (203) is fixedly connected to the top of the outer side of the conical cylinder (201), and an ash discharge valve (204) is fixedly connected to the bottom of the conical cylinder (201).

7. A waste heat recovery device for dryer exhaust gas with exhaust gas purification function according to claim 1, characterized in that: The inner side of the extension section (3) is provided with an integrally formed isolation protrusion. The inner side of the extension section (3) is provided with a pressure ring (15). The pressure ring (15) is installed on the inner side of the extension section (3) by bolts. A gathering piece (16) is provided between the pressure ring (15) and the extension section (3). The gathering piece (16) is made of high temperature resistant fluororubber cloth material.

8. A waste heat recovery device for dryer exhaust gas with exhaust gas purification function according to claim 7, characterized in that: The outer side of the gathering piece (16) is provided with six hooks (17), and the outer side of the hooks (17) is movably connected to a support rod (18). The bottom of the support rod (18) is rotatably connected to the bottom of the inner side of the extension section (3), and the top of the extension section (3) is fixedly connected to a flue pipe (19).

9. A waste heat recovery device for dryer exhaust gas with exhaust gas purification function according to claim 8, characterized in that: The outer side of the gathering piece (16) is provided with a synchronization ring (20), and the bottom of the synchronization ring (20) is rotatably connected to a slant frame (21), and the bottom of the slant frame (21) is rotatably connected to a support rod (18).

10. A waste heat recovery device for dryer exhaust gas with exhaust gas purification function according to claim 9, characterized in that: An electric cylinder (22) is fixedly connected to the bottom of the extension section (3). The telescopic end of the electric cylinder (22) passes through the extension section (3) and is fixedly connected to the bottom of the synchronization ring (20).

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