A flue gas waste heat recovery device

Abstract

The present application relates to the field of waste heat recovery, and more particularly to a flue gas waste heat recovery device, comprising a desulfurization and denitration tower and a treatment tank; the treatment tank is provided with an air inlet and an air outlet at two ends, the air inlet is connected with the output end of the desulfurization and denitration tower; a plurality of treatment discs are equidistantly arranged inside the treatment tank; a treatment groove is arranged at the center of each treatment disc, two liquid storage cavities are arranged inside each treatment disc, two water inlet holes communicating with the corresponding storage cavities are arranged on the outer circumferential surface of each treatment disc, and a plugging assembly capable of plugging and opening the water inlet hole is arranged in each water inlet hole; a waste heat recovery mechanism for fully contacting the liquid in the liquid storage cavity with the flue gas is arranged in each treatment groove; each group of waste heat recovery mechanisms comprises water spray heads equidistantly arranged on the inner walls of both sides of the treatment groove. The present application can repeatedly contact the liquid with the flue gas through the rotation of the treatment disc, thereby improving the heat absorption effect on the flue gas.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery, and more specifically, to a flue gas waste heat recovery device. Background Technology

[0002] In industrial production, boilers, steel smelting, cement kilns, chemical manufacturing, and other equipment generate large amounts of high-temperature flue gas after burning fuel. This flue gas contains not only sulfur dioxide (SO2) and nitrogen oxides (NOx)... x The flue gas contains major air pollutants such as saturated gas and heat energy. According to calculations, the heat carried in the flue gas accounts for a considerable proportion of the energy input from the fuel. The exhaust temperature of the combined heat and power (CHP) unit alone can reach 135-145℃. Of this, 7%-15% of the sensible heat and about 10% of the latent heat are not effectively utilized. Direct emissions not only cause serious energy waste but also exacerbate thermal pollution in the environment.

[0003] Chinese patent CN117190721B discloses a waste heat recovery device for flue gas from a heating furnace, including a housing. A filter plate is fixed on the inner wall of the housing near one end of the flue gas inlet pipe. Inside the housing, there is a spaced sealing component and a spaced water outlet component located between the filter plate and the flue gas outlet pipe and connected to the output end of a servo motor.

[0004] In this patent, the flue gas treatment effect is improved by intermittently closing the flue gas flow port. However, after spraying water, the liquid only comes into contact with the flue gas for a short time and cannot be repeatedly contacted with the flue gas before being discharged. This results in a low temperature after heat exchange of the liquid, making it unable to be effectively utilized. Summary of the Invention

[0005] The main objective of this invention is to provide a flue gas waste heat recovery device, which, through the rotation of the processing disc, enables the liquid to repeatedly contact the flue gas, thereby improving the heat absorption effect of the flue gas.

[0006] To achieve the above objectives, the present invention provides a flue gas waste heat recovery device, including a desulfurization and denitrification tower, a treatment tank, treatment plates, and a waste heat recovery mechanism. The treatment tank is horizontally arranged by a support, and an air inlet and an air outlet are respectively provided at both ends of the treatment tank. The air inlet is connected to the output end of the desulfurization and denitrification tower. Multiple treatment plates are coaxially and equidistantly arranged inside the treatment tank and are rotatable. Each treatment plate has a treatment groove penetrating its center. Each treatment plate has two liquid storage chambers located on either side of the corresponding treatment groove. Each treatment plate has two water inlets on its outer circumference that connect to the corresponding storage chambers. Each water inlet has a sealing mechanism. The treatment tank includes a sealing assembly for blocking and opening; multiple inlet pipes are equidistantly arranged on the outer wall of the top, and these inlet pipes are interconnected through a main inlet pipe; multiple outlet pipes are also arranged on the outer wall of the bottom, and these outlet pipes are interconnected through a main outlet pipe; multiple waste heat recovery mechanisms are set up in the corresponding treatment tanks to ensure that the liquid in the storage chamber is in full contact with the flue gas; each waste heat recovery mechanism includes a spray head and a recovery assembly; there are multiple spray heads, which are equidistantly arranged on the inner walls of both sides of the treatment tank and each spray head is connected to the corresponding storage chamber; multiple recovery holes are also provided on both sides of the treatment tank, and each recovery hole is equipped with a recovery assembly that can block and open the recovery hole as the treatment plate rotates.

[0007] Preferably, each processing plate is further provided with a circular groove at both ends, and an interception box is provided at the center of each circular groove. The interception box is connected to the processing tank. The processing plate is also provided with a sealing cover at both ends. The sealing cover is provided with two vent holes in the circumferential direction. The interception box is provided with multiple through holes equidistantly on one side along the length direction. Multiple mounting plates are provided equidistantly on the inner wall of the bottom of the interception box. Each mounting plate is provided with a sliding hole. The sliding hole is coaxial with the corresponding vent hole. A connecting post is slidably installed in each sliding hole. Each connecting post is provided with a sealing plate at both ends for sealing the vent hole.

[0008] Preferably, each circular groove has two sets of serpentine flow channels on the inner wall at the bottom, with the two sets of serpentine flow channels located on both sides of the corresponding interception box.

[0009] Preferably, each sealing assembly includes a guide rod, a limiting ring, and a memory metal spring; each liquid storage chamber is also provided with a horizontal plate, and each horizontal plate is also provided with a guide hole, which is coaxially arranged with the corresponding water inlet. The guide rod is slidably arranged in the corresponding guide hole, and a sealing post is provided at the end of the guide rod near the corresponding water inlet. The limiting ring is arranged on the guide rod and located between the corresponding sealing post and the horizontal plate. Multiple memory metal springs are also provided between the limiting ring and the corresponding horizontal plate.

[0010] Preferably, each guide rod is also fitted with a compression spring, which is located between the corresponding limit ring and the horizontal plate.

[0011] Preferably, the recovery assembly includes a positioning cylinder, a telescopic rod, and a sealing ball; the positioning cylinder is coaxially disposed in the corresponding recovery hole, the opening of the positioning cylinder faces the corresponding processing tank and the positioning cylinder is located inside the corresponding liquid storage chamber, one end of the telescopic rod is coaxially disposed at the center of the bottom inner wall of the positioning cylinder, and the other end of the telescopic rod is connected to a sealing ball, the sealing ball is in contact with the inner wall of the positioning cylinder, and multiple rectangular liquid inlet grooves are provided circumferentially on the outer wall of the positioning cylinder.

[0012] Preferably, the inner walls on both sides of the treatment tank along its length are provided with V-shaped guide surfaces.

[0013] Preferably, two interception plates for intercepting flue gas are provided at the center of each side of the treatment plate. The opposing ends of the two adjacent interception plates extend toward the center of the corresponding treatment tank. The two adjacent interception plates are located on both sides of the corresponding treatment tank along the length direction, and a narrow channel for flue gas to pass through is formed between the two adjacent interception plates.

[0014] Preferably, a drive motor is also provided at the center of one end of the processing tank. The motor shaft of the drive motor passes through the processing tank and is connected to the corresponding processing plate. Adjacent processing plates are connected to each other through docking posts.

[0015] Preferably, a strip filter box is also provided at the air inlet, and an isolation plate is also provided at the bottom of the strip filter box near the desulfurization and denitrification tower. A cover plate is also provided at the top of the strip filter box, and a space is left between the cover plate and the isolation plate for flue gas to pass through. Filter cotton is also provided on the side of the isolation plate near the treatment tank.

[0016] The advantages of this application compared to the prior art are:

[0017] 1. This application utilizes multiple processing discs in cooperation, and through the water inlet holes on the outer wall of the processing discs, it achieves the replacement of the liquid in the water storage chamber inside the processing discs. Furthermore, through the rotation of the processing discs, the liquid in the water storage chamber can repeatedly come into contact with the flue gas through the water spray head, allowing the liquid to fully absorb heat, thereby improving the heat absorption effect of the flue gas.

[0018] 2. This application utilizes the combination of a serpentine flow channel, a sealing cap, and an interception box. Flue gas enters the corresponding serpentine flow channel through the vent of the sealing cap, thereby slowing down the movement speed of the flue gas and increasing the contact time between the flue gas and the inner wall of the bottom of the circular groove. This allows the cold water in the liquid storage chamber to better absorb the residual heat of the flue gas, and makes the movement path of the flue gas in the processing plate U-shaped, thereby achieving full utilization of the residual heat of the flue gas.

[0019] 3. Through the cooperation of the guide rod and the limiting ring, when the temperature of the cold water in the liquid storage chamber rises to a certain temperature, the memory metal spring can contract, thereby pulling the sealing column. At this time, the water inlet is in the open state, and the heated liquid can enter the corresponding water outlet pipe through the water inlet. Thus, when the liquid temperature rises to a certain temperature, the liquid can be discharged in time, thereby ensuring the treatment effect of the flue gas. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention, making other features, objects, and advantages of the invention more apparent. The illustrative embodiments of the invention illustrated in the drawings and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a side view of the present invention;

[0023] Figure 3 yes Figure 2 A planar sectional view along the AA direction;

[0024] Figure 4 yes Figure 3 Enlarged view of a section at point B in the middle;

[0025] Figure 5 This is a partial three-dimensional decomposition of the present invention. Figure 1 ;

[0026] Figure 6 This is a partial three-dimensional decomposition of the present invention. Figure 2 ;

[0027] Figure 7 This is a partial perspective sectional view of the present invention;

[0028] Figure 8 yes Figure 7 Enlarged view of a section at point C;

[0029] Figure 9 yes Figure 7 Enlarged view of a section at point D.

[0030] The numbers in the above figure are:

[0031] 1-Desulfurization and denitrification tower;

[0032] 2-Processing tank; 21-Air inlet; 211-Strip filter box; 212-Baffle plate; 213-Cover plate; 214-Filter cotton; 22-Air outlet; 23-Water inlet pipe; 24-Main water inlet pipe; 25-Water outlet pipe; 26-Main water outlet pipe; 27-Drive motor;

[0033] 3-Processing disc; 31-Processing tank; 311-Recovery hole; 312-V-shaped guide surface; 313-Blocking plate; 32-Liquid storage chamber; 321-Horizontal plate; 322-Guide hole; 33-Water inlet hole; 34-Blocking assembly; 341-Guide rod; 3411-Blocking column; 342-Limiting ring; 343-Memory metal spring; 344-Compression spring; 35-Circular groove; 351-Blocking box; 3511-Perforation; 3512-Mounting plate; 3513-Sliding hole; 352-Connecting column; 353-Blocking disc; 36-Serpentine flow channel; 37-Blocking cover; 371-Vent hole; 38-Connecting column;

[0034] 4- Waste heat recovery mechanism; 41- Spray head; 42- Recovery component; 421- Positioning cylinder; 4211- Rectangular liquid inlet trough; 422- Telescopic rod; 423- Sealing ball. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0036] See Figures 1 to 9As shown, a flue gas waste heat recovery device includes a desulfurization and denitrification tower 1, a treatment tank 2, a treatment plate 3, and a waste heat recovery mechanism 4. The treatment tank 2 is horizontally arranged by a support, and an air inlet 21 and an air outlet 22 are respectively provided at the edges of both ends of the treatment tank 2. The air inlet 21 is connected to the output end of the desulfurization and denitrification tower 1. There are multiple treatment plates 3, which are coaxially and equidistantly arranged inside the treatment tank 2 and can rotate. Each treatment plate 3 has a treatment groove 31 that penetrates through the center of the corresponding treatment plate 3. Each treatment plate 3 has two liquid storage chambers 32, which are located on both sides of the corresponding treatment groove 31. Each treatment plate 3 has two water inlets 33 on its outer peripheral surface that communicate with the corresponding storage chambers. Each water inlet 33 has a sealing component 34 that can be used to seal and open the water inlet 33. Multiple water inlet pipes 23 are equidistantly arranged on the top outer wall of the tank 2. The multiple water inlet pipes 23 are interconnected through a main water inlet pipe 24. Multiple water outlet pipes 25 are also arranged on the bottom outer wall of the treatment tank 2. The multiple water outlet pipes 25 are interconnected through a main water outlet pipe 26. There are multiple sets of waste heat recovery mechanisms 4. The waste heat recovery mechanisms 4 are set in the corresponding treatment tank 31 and are used to ensure that the liquid in the liquid storage chamber 32 is in full contact with the flue gas. Each set of waste heat recovery mechanisms 4 includes a water spray head 41 and a recovery component 42. There are multiple water spray heads 41. The multiple water spray heads 41 are equidistantly arranged on the inner walls of both sides of the treatment tank 31 and each water spray head 41 is connected to the corresponding liquid storage chamber 32. Multiple recovery holes 311 are also arranged on both sides of the treatment tank 31. Each recovery hole 311 is equipped with a recovery component 42 that can be blocked and opened as the treatment plate 3 rotates.

[0037] By rotating the processing plate 3, the water inlet hole 33 on the outer wall of the processing plate 3 can be connected with the corresponding water inlet pipe 23. At this time, by adjusting the corresponding sealing component 34, the water inlet hole 33 is opened. Then, cold water is delivered into the main water inlet pipe 24 and delivered to the liquid storage chamber 32 of the corresponding processing plate 3 through multiple water inlet pipes 23.

[0038] After the flue gas is treated in the desulfurization and denitrification tower 1, it is then transported to the treatment tank 2 through the inlet 21. At this point, multiple treatment plates 3 are equidistantly arranged inside the treatment tank 2, and the outer circumference of the treatment plates 3 slides and seals against the inner wall of the treatment tank 2. This allows the flue gas to pass only through the treatment trough 31 and the corresponding treatment plate 3. Initially, the treatment trough 31 is horizontally positioned, with two liquid storage chambers 32 of the treatment plate 3 located above and below the corresponding treatment trough 31, respectively. Cold water is located in the upper liquid storage chamber 32. Multiple recovery holes 311 at the top of the treatment trough 31 are closed under the action of the corresponding recovery component 42, allowing the cold water to be sprayed out through the spray nozzle 41 under gravity, thus contacting the passing flue gas and absorbing its residual heat. Simultaneously, multiple recovery holes 311 at the bottom of the treatment trough 31 are opened under the action of the corresponding recovery component 42, allowing the absorbed cold water to pass through the treatment trough 31. The bottom recovery hole 311 leads into the lower liquid storage chamber 32. When the spray head 41 stops spraying cold water, the corresponding treatment plate 3 is rotated 180°, causing the lower liquid storage chamber 32 to move upward. This allows the liquid that has been in contact with the flue gas once to have a second contact with the flue gas through the spray head 41, enabling the cold water to absorb heat from the flue gas as much as possible, thus ensuring the recovery effect of the flue gas waste heat. After multiple contacts with the cold water, the flue gas can be discharged through the air outlet 22 at the end of the treatment tank 2, thus making full use of the flue gas waste heat. When the cold water reaches a certain temperature, the water inlet 33 is opened with the cooperation of the sealing component 34, allowing the heated liquid in the lower liquid storage chamber 32 to be discharged through the water outlet pipe 25. New cold water is then transported to the upper liquid storage chamber 32 through the water inlet pipe 23, thus enabling continuous and uninterrupted treatment of the flue gas. The operator can reuse the heat-absorbing liquid through the main water outlet pipe 26.

[0039] See Figures 5 to 9 As shown, each processing plate 3 is provided with a circular groove 35 at both ends, and an interception box 351 is provided at the center of each circular groove 35. The interception box 351 is connected to the processing groove 31. The processing plate 3 is also provided with a sealing cover 37 at both ends. The sealing cover 37 is provided with two vent holes 371 in the circumferential direction. The interception box 351 is provided with multiple through holes 3511 equidistantly on one side along the length direction. Multiple mounting plates 3512 are provided equidistantly on the bottom inner wall of the interception box 351. Each mounting plate 3512 is provided with a sliding hole 3513. The sliding hole 3513 is coaxially arranged with the corresponding vent hole 371. A connecting post 352 is slidably arranged in each sliding hole 3513. Each connecting post 352 is provided with a sealing plate 353 at both ends for sealing the vent hole 371.

[0040] To improve the recovery of waste heat from flue gas, the sealing cover 37 and the interception box 351 work together to divide the circular groove 35 into two semi-circular areas. Two vent holes 371 connect to their respective semi-circular areas. The interception box 351 is horizontal, and the sealing disc 353 at the lower end of the connecting column 352 seals the lower perforation 3511, while the upper perforation 3511 remains open. Flue gas can then enter the upper semi-circular area through the vent holes 371 on the sealing cover 37. The flue gas can initially heat the cold water in the liquid storage chamber 32 within the semi-circular area, and the flue gas can enter the treatment tank 31 from one side interceptor box 351, so that the liquid sprayed by the water nozzle 41 can contact the flue gas to absorb heat. Subsequently, the flue gas that has completed contact can enter the corresponding semi-circular area through the other side interceptor box 351, so that the flue gas can heat the cold water a second time. The movement path of the flue gas in the treatment plate 3 is U-shaped, thereby realizing the full utilization of the waste heat of the flue gas.

[0041] See Figure 5 As shown, each circular groove 35 has two sets of serpentine flow channels 36 on the bottom inner wall, and the two sets of serpentine flow channels 36 are located on both sides of the corresponding interception box 351.

[0042] To further increase the contact time between the flue gas and the inner wall of the bottom of the circular groove 35, two sets of serpentine flow channels 36 are provided on the inner wall of the bottom of the circular groove 35. The two sets of serpentine flow channels 36 are located on both sides of the corresponding interception box 351. The flue gas enters the corresponding serpentine flow channel 36 through the vent 371 of the sealing cover 37, thereby slowing down the movement speed of the flue gas and increasing the contact time between the flue gas and the inner wall of the bottom of the circular groove 35, so that the cold water in the liquid storage chamber 32 can better absorb the residual heat of the flue gas.

[0043] See Figures 4 to 9 As shown, each sealing assembly 34 includes a guide rod 341, a limiting ring 342, and a memory metal spring 343; each liquid storage chamber 32 is also provided with a horizontal plate 321, and each horizontal plate 321 is also provided with a guide hole 322. The guide hole 322 is coaxially arranged with the corresponding water inlet 33. The guide rod 341 is slidably arranged in the corresponding guide hole 322. A sealing post 3411 is provided at one end of the guide rod 341 near the corresponding water inlet 33. The limiting ring 342 is arranged on the guide rod 341 and is located between the corresponding sealing post 3411 and the horizontal plate 321. Multiple memory metal springs 343 are also provided between the limiting ring 342 and the corresponding horizontal plate 321.

[0044] When cold water needs to be injected into the liquid storage chamber 32, the water pressure causes the guide rod 341 to compress the corresponding memory metal spring 343, allowing the sealing column 3411 to move away from the water inlet 33 and enabling cold water to enter the liquid storage chamber 32. When the temperature of the cold water in the liquid storage chamber 32 rises to a certain temperature, the memory metal spring 343 contracts, thereby pulling the sealing column 3411. At this time, the water inlet 33 is open, and the heated liquid can enter the corresponding water outlet pipe 25 through the water inlet 33, so that the liquid can be discharged in time when the liquid temperature rises to a certain temperature, thus ensuring the treatment effect of flue gas.

[0045] See Figure 8 As shown, each guide rod 341 is also fitted with a compression spring 344, which is located between the corresponding limiting ring 342 and the horizontal plate 321.

[0046] To prevent the shape memory metal spring 343 from being over-compressed and unable to return to its original position after liquid is added, thus preventing the sealing column 3411 from failing to reset in time and causing liquid leakage through the water inlet 33, a compression spring 344 is also provided on each guide rod 341. When liquid is added, the pressure generated by the liquid can simultaneously overcome the elastic force of the compression spring, thereby pushing the sealing column 3411 to move and deliver liquid into the water storage chamber. After delivery is completed, the elastic force of the compression spring can quickly reset the sealing column 3411, thus preventing the water inlet 33 from remaining open after water is added, which would cause liquid leakage.

[0047] See Figures 3 to 9 As shown, the recycling assembly 42 includes a positioning cylinder 421, a telescopic rod 422, and a sealing ball 423. The positioning cylinder 421 is coaxially disposed in the corresponding recycling hole 311, with the opening of the positioning cylinder 421 facing the corresponding processing tank 31 and the positioning cylinder 421 located inside the corresponding liquid storage chamber 32. One end of the telescopic rod 422 is coaxially disposed at the center of the bottom inner wall of the positioning cylinder 421, and the other end of the telescopic rod 422 is connected to the sealing ball 423. The sealing ball 423 is in contact with the inner wall of the positioning cylinder 421, and multiple rectangular liquid inlet grooves 4211 are arranged circumferentially on the outer wall of the positioning cylinder 421.

[0048] When the treatment tank 31 is in a horizontal state, the sealing ball 423 located in the upper positioning cylinder 421, under the action of gravity and the elastic force of the telescopic rod 422, can move to the opening end of the corresponding positioning cylinder 421, thereby sealing the opening of the positioning cylinder 421 and the recovery hole 311, ensuring that the liquid can only be sprayed out through the spray head 41, ensuring the liquid dispersion area, and improving the contact effect between the liquid and the flue gas. After the liquid is sprayed, the sealing ball 423 located in the lower positioning cylinder 421, under the action of gravity, causes the telescopic rod 422 to overcome its elastic force, and the sealing ball 423 can retract into the corresponding positioning cylinder 421, so that the contacted liquid can enter the lower liquid storage chamber 32 through the rectangular liquid inlet groove 4211 on the outer wall of the positioning cylinder 421. This not only collects the liquid and prevents the liquid from overflowing, but also enables the liquid to repeatedly absorb heat from the flue gas.

[0049] See Figure 3 and Figure 4 As shown, V-shaped guide surfaces 312 are provided on the inner walls of both sides along the length direction of the processing tank 31.

[0050] By providing a V-shaped guide surface 312, the sprayed liquid can not only be guided so that it can slide into the recovery hole 311 for easy collection, but it can also make secondary impacts with the sprayed liquid, allowing the liquid to escape again and come into further contact with the flue gas, thereby improving the heat absorption effect.

[0051] See Figure 3 and Figure 4 As shown, two interception plates 313 for intercepting flue gas are provided at the center of both sides of the treatment plate 3. The opposing ends of the two adjacent interception plates 313 extend toward the center of the corresponding treatment tank 31. The two adjacent interception plates 313 are located on both sides of the corresponding treatment tank 31 along the length direction, and a narrow channel for flue gas to pass through is formed between the two adjacent interception plates 313.

[0052] To further slow down the flow velocity of the flue gas and ensure sufficient contact between the liquid and the flue gas, an interceptor plate 313 is installed. This reduces the area of ​​the inlet and outlet of the treatment tank 31, allowing the flue gas to remain inside the treatment tank 31 for a longer period of time. Furthermore, the opposing ends of two adjacent interceptor plates 313 extend towards the center of the corresponding treatment tank 31, allowing the liquid, after being sprayed by the water nozzle 41, to collide with the V-shaped guide surface 312 and the interceptor plate 313 respectively. This improves the dispersion of the liquid within the treatment tank 31, ensuring sufficient contact between the liquid and the flue gas, further increasing the contact time and contact area between the liquid and the flue gas, and improving the efficiency of recovering waste heat from the flue gas.

[0053] See Figure 3As shown, a drive motor 27 is also provided at the center of one end of the processing tank 2. The motor shaft of the drive motor 27 passes through the processing tank 2 and is connected to the corresponding processing plate 3. Adjacent processing plates 3 are connected to each other through docking posts 38.

[0054] Adjacent processing discs 3 are connected to each other by docking posts 38. When the motor shaft of the drive motor 27 rotates, it can make multiple processing discs 3 rotate synchronously through multiple docking posts 38, thereby making the liquid come into contact with the flue gas repeatedly.

[0055] See Figures 1 to 4 As shown, a strip filter box 211 is also provided at the air inlet 21. A baffle plate 212 is also provided on the bottom side of the strip filter box 211 near the desulfurization and denitrification tower. A cover plate 213 is also provided on the top of the strip filter box 211. A space is left between the cover plate 213 and the baffle plate 212 for flue gas to pass through. A filter cotton 214 is also provided on the side of the baffle plate 212 near the treatment tank 2.

[0056] To prevent impurities in the flue gas from accumulating in the treatment pan 3, a strip filter box 211 is installed at the air inlet 21. The flue gas is guided by the partition plate 212, allowing it to move vertically upwards between the cover plate 213 and the partition plate 212. The filter cotton 214 removes dust and impurities from the flue gas, preventing dust from accumulating in the treatment pan 3. Furthermore, the cover plate 213 facilitates the replacement of the filter cotton 214 by the staff.

[0057] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A flue gas waste heat recovery device, characterized in that, This includes desulfurization and denitrification towers, treatment tanks, treatment pans, and waste heat recovery mechanisms; The treatment tank is set horizontally by a support, and an air inlet and an air outlet are respectively set at the two ends of the treatment tank. The air inlet is connected to the output end of the desulfurization and denitrification tower. There are multiple processing discs, which are coaxially and equidistantly arranged inside the processing tank and can rotate. Each processing disc has a processing groove that runs through the center of the corresponding processing disc. Each processing disc has two liquid storage chambers inside, which are located on both sides of the corresponding processing groove. Each processing disc has two water inlet holes on its outer circumference that connect to the corresponding storage chamber. Each water inlet hole is equipped with a sealing component that can be used to seal and open the water inlet hole. The outer wall of the top of the treatment tank is also equipped with multiple water inlet pipes at equal intervals, and the multiple water inlet pipes are connected to each other through a main water inlet pipe. The outer wall of the bottom of the treatment tank is also equipped with multiple water outlet pipes, and the multiple water outlet pipes are connected to each other through a main water outlet pipe. There are multiple sets of waste heat recovery mechanisms, which are set in the corresponding treatment tanks and are used to ensure that the liquid in the storage chamber is in full contact with the flue gas. Each set of waste heat recovery mechanisms includes a water spray head and a recovery component. There are multiple water spray heads, which are equidistantly arranged on the inner walls of both sides of the treatment tank and each water spray head is connected to the corresponding storage chamber. Multiple recovery holes are also provided on both sides of the treatment tank. Each recovery hole is equipped with a recovery component that can be sealed and opened as the treatment plate rotates.

2. The flue gas waste heat recovery device according to claim 1, characterized in that, Each processing plate has a circular groove at both ends, and an interception box is located at the center of each circular groove. The interception box is connected to the processing tank. The processing plate also has a sealing cover at both ends, and the sealing cover has two vent holes circumferentially. The interception box has multiple through holes equidistantly arranged on one side along its length. The bottom inner wall of the interception box has multiple mounting plates equidistantly arranged, and each mounting plate has a sliding hole. The sliding hole is coaxial with the corresponding vent hole. A connecting post is slidably installed in each sliding hole, and each connecting post has a sealing plate at both ends for sealing the vent hole.

3. The flue gas waste heat recovery device according to claim 2, characterized in that, Each circular groove also has two sets of serpentine flow channels on the inner wall at the bottom, with the two sets of serpentine flow channels located on both sides of the corresponding interception box.

4. The flue gas waste heat recovery device according to claim 1, characterized in that, Each sealing assembly includes a guide rod, a limit ring, and a memory metal spring; Each liquid storage chamber is also equipped with a horizontal plate, and each horizontal plate is also equipped with a guide hole. The guide hole is coaxially arranged with the corresponding water inlet. The guide rod is slidably arranged in the corresponding guide hole. A sealing column is arranged at the end of the guide rod near the corresponding water inlet. A limiting ring is arranged on the guide rod and located between the corresponding sealing column and the horizontal plate. Multiple memory metal springs are also arranged between the limiting ring and the corresponding horizontal plate.

5. The flue gas waste heat recovery device according to claim 1, characterized in that, Each guide rod is also fitted with a compression spring, which is located between the corresponding limit ring and the horizontal plate.

6. The flue gas waste heat recovery device according to claim 1, characterized in that, The recovery components include a positioning cylinder, a telescopic rod, and a sealing ball; The positioning cylinder is coaxially set in the corresponding recovery hole, with the opening of the positioning cylinder facing the corresponding treatment tank and the positioning cylinder located inside the corresponding liquid storage chamber. One end of the telescopic rod is coaxially set at the center of the bottom inner wall of the positioning cylinder, and the other end of the telescopic rod is connected to a sealing ball. The sealing ball fits against the inner wall of the positioning cylinder, and multiple rectangular liquid inlet grooves are arranged circumferentially on the outer wall of the positioning cylinder.

7. The flue gas waste heat recovery device according to claim 1, characterized in that, The inner walls on both sides of the treatment tank along its length are provided with V-shaped guide surfaces.

8. The flue gas waste heat recovery device according to claim 1, characterized in that, Two interception plates for intercepting flue gas are set at the center of each side of the treatment plate. The opposing ends of the two adjacent interception plates extend toward the center of the corresponding treatment tank. The two adjacent interception plates are located on both sides of the corresponding treatment tank along the length direction, and a narrow channel for flue gas to pass through is formed between the two adjacent interception plates.

9. A flue gas waste heat recovery device according to claim 1, characterized in that, A drive motor is also installed at the center of one end of the processing tank. The motor shaft of the drive motor passes through the processing tank and is connected to the corresponding processing plate. Adjacent processing plates are connected to each other through docking columns.

10. A flue gas waste heat recovery device according to claim 1, characterized in that, A strip filter box is also installed at the air inlet. A baffle plate is installed at the bottom of the strip filter box near the desulfurization and denitrification tower. A cover plate is installed at the top of the strip filter box. A space is left between the cover plate and the baffle plate for flue gas to pass through. Filter cotton is installed on the side of the baffle plate near the treatment tank.

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