A multi-stage flue gas circulating low-nitrogen burner

Abstract

The present application relates to the technical field of flue gas treatment, in particular to a multistage flue gas circulating low-nitrogen burner, comprising a first-stage treatment box and a second-stage treatment box, the first-stage treatment box is L-shaped and the upper end is open, a partition plate is arranged in the middle of the first-stage treatment box for dividing the first-stage treatment box and forming a communicating vessel at the bottom of the first-stage treatment box, one end of the communicating vessel is provided with a solid impurity removal device, the solid impurity removal device comprises two driving plates that can rotate synchronously, the inner sides of the two driving plates are provided with collecting plates for scraping the bottom wall of the communicating vessel, and the driving plates can form an L-shaped trajectory of the collecting plates when rotating to collect dust along the bottom wall of the communicating vessel; the flue gas released by the low-nitrogen burner can be treated twice, the flue gas can be treated in multiple stages to purify it, and the pollution of air can be reduced to protect the atmosphere.

Description

Technical Field

[0001] This invention relates to the field of flue gas treatment technology, and in particular to a multi-stage flue gas recirculation low-NOx burner. Background Technology

[0002] Fire is used in both industrial and residential life. Many items produce a large amount of flue gas when they burn and release heat. Flue gas is a mixture of gases and soot, and it is a major cause of atmospheric pollution. The composition of flue gas is very complex. The gases include water vapor, sulfur dioxide, nitrogen, oxygen, carbon monoxide, carbon dioxide, hydrocarbons, and nitrogen oxides, while the soot includes fuel ash, coal particles, oil droplets, and high-temperature pyrolysis products. Low-NOx burners are burners that emit low levels of nitrogen oxides during fuel combustion. Using low-NOx burners can reduce nitrogen oxide emissions during combustion. Although low-NOx is used as a combustion fuel, the flue gas released during combustion often contains a small amount of impurities, which can still cause some pollution. Therefore, a multi-stage flue gas recirculation low-NOx burner is designed to solve the problems mentioned above. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a multi-stage flue gas recirculation low-NOx burner that can perform secondary treatment on the flue gas released by the low-NOx burner. It can purify the flue gas through multi-stage treatment, reduce air pollution, protect the atmosphere, and effectively solve the problems mentioned in the background art.

[0004] The technical solution adopted by the present invention to solve the above problems is as follows:

[0005] A multi-stage flue gas recirculation low-NOx burner includes a primary treatment box and a secondary treatment box. The primary treatment box is L-shaped with an open top. A partition is provided in the middle of the primary treatment box to divide it and form a communicating vessel at its bottom. A solid impurity removal device is provided at one end of the communicating vessel. The solid impurity removal device includes two synchronously rotating drive plates. A collection plate is provided on the inner side of the two drive plates for scraping the bottom wall of the communicating vessel. When the drive plates rotate, the collection plate can form an L-shaped trajectory to collect dust along the bottom wall of the communicating vessel. The bottom of the secondary treatment box is provided with two jet pipes that communicate with the pipes of the primary treatment box. The bottom of the secondary treatment box is also provided with a rotatable disc. When the disc rotates, the jet pipes can form a structure in which they swing back and forth and alternately swing up and down.

[0006] The first motor is provided on the left and right end surfaces of the primary processing box. The output end of the first motor is fixedly connected to a worm gear, and the upper end of the worm gear is engaged with a worm wheel. The drive plate is coaxially fixedly connected to the corresponding worm wheel.

[0007] Side rail plates are fixedly connected to the left and right sides of the bottom inner wall of the primary processing box. L-shaped rail grooves are opened on the side rail plates. Long sliding pins are slidably connected to the inner walls of the L-shaped rail grooves. Long keyways that cooperate with the corresponding long sliding pins are opened on the drive plate. Square sliders that are slidably connected to the corresponding side rail plates are fixedly connected to the middle part of the outer surface of the long sliding pins. The collection plate is installed inside the two long sliding pins.

[0008] A surrounding plate is fixed to the outer periphery of the upper surface of the collecting plate. The surrounding plate is fixed to the inner end face of two long sliding pins. A shovel is provided at the rear end of the collecting plate. A sealing plate is slidably connected to the inner wall of the rear end of the surrounding plate. The lower end of the sealing plate is provided with an inclined surface that cooperates with the shovel. A horizontal plate is fixed to the upper surface of the surrounding plate. A clutch plate that cooperates with the sealing plate is slidably connected to the middle of the lower end surface of the horizontal plate. A first sliding pin is fixed to the inner wall of the middle part of the sealing plate. A clutch groove that engages with the first sliding pin is provided on the inner wall of the clutch plate.

[0009] The clutch groove includes an inclined groove and two stationary grooves connected to both ends of the inclined groove. When the first sliding pin engages with the corresponding stationary groove, the sealing plate is in a stationary state. When the first sliding pin engages with the corresponding inclined groove, the sealing plate is in a moving state.

[0010] A negative pressure port is fixed to the upper inner wall of the primary processing box. The inner wall of the negative pressure port is equipped with a rotatable fan blade. A heating tube is also provided on the upper inner wall of the primary processing box. A collection port is fixed to the top surface of the primary processing box. A transmission tube is fixed to the upper end of the collection port. The other end of the transmission tube is connected to the inner wall of the secondary processing box.

[0011] A second motor is fixedly connected to the lower surface of the secondary processing box, and the disc is fixedly connected to the output end of the second motor. A central support rod is rotatably connected to the inner wall of the bottom of the secondary processing box. An active swing arm is fixedly connected to the lower end of the outer surface of the central support rod. A short keyway is opened at the upper end of the active swing arm. A short sliding pin that matches the short keyway is hinged at the non-center part of the upper surface of the disc. The jet pipe is installed at the upper end of the central support rod.

[0012] A T-shaped tube is fixed to the upper surface of the central upright rod. The jet pipes are rotatably connected to the front and rear ends of the T-shaped tube. Cranks are fixed to the outer surfaces of the jet pipes. A driven swing arm is fixed to the middle of the outer surface of the central upright rod. A slide block is slidably connected to the upper surface of the driven swing arm. Short connecting rods are hinged to the front and rear sides of the upper end of the slide block. The other end of the short connecting rods is hinged to the corresponding cranks. A second sliding pin is fixed to the lower surface of the slide block. A fan-shaped rail plate is provided at the lower end of the driven swing arm. A wave groove that cooperates with the second sliding pin is opened on the upper surface of the fan-shaped rail plate.

[0013] The inner wall of the secondary treatment box is fixed with multiple inclined baffles, and each inclined baffle has a rotatable bubble-breaking roller at its end.

[0014] A frame is fixed to the lower end of the outer surface of the secondary processing box, and support legs are fixed to each corner of the frame.

[0015] This invention features a novel structure, ingenious design, and simple and convenient operation, offering the following advantages compared to existing technologies:

[0016] By connecting the inlet end of the air inlet pipe to the flue gas exhaust port of the low-NOx burner, the flue gas enters the bottom of the communicating vessel where it meets the water. Some water-soluble gases, such as dust, in the flue gas can remain or dissolve in the water. Since the flue gas is gaseous, it rises due to its own buoyancy and enters the secondary treatment tank. The secondary treatment tank contains weak acid, weak alkali, or other compound liquids that can react with water-insoluble or other harmful gases in the flue gas. After a period of use, when there is excessive dust at the bottom of the communicating vessel, the solid impurity removal device, which operates upon starting the first motor, causes the collection plate to follow an L-shaped trajectory along the bottom wall of the communicating vessel to collect dust. This is achieved through the combination of the communicating vessel and the solid impurity removal device. The entire operation is sealed, reducing the risk of flue gas leakage. It also allows for dust removal from the bottom of the communicating vessel without shutting down the machine, improving efficiency, reducing costs, and minimizing the risk of leakage. Inside the secondary treatment chamber, the second motor, which rotates the corresponding disc, causes the jet pipe to swing back and forth and up and down alternately, ensuring the flue gas is evenly sprayed onto the bottom of the chamber. This allows the gas to fully react with the chemical solution, achieving purification. The primary and secondary treatment chambers allow for multiple treatments of the flue gas before it is released into the air, reducing air pollution. The inclined baffles and bubble-breaking rollers extend the residence time of the flue gas in the solution and increase the reaction rate, resulting in cleaner flue gas purification. Attached Figure Description

[0017] Figure 1 This is an isometric view I of a multi-stage flue gas recirculation low-NOx burner according to the present invention.

[0018] Figure 2 This is an isometric view II of a multi-stage flue gas recirculation low-NOx burner according to the present invention.

[0019] Figure 3 This is a cross-sectional view of the primary treatment chamber of a multi-stage flue gas recirculation low-NOx burner according to the present invention.

[0020] Figure 4 This is a schematic diagram of the collection port installation of a multi-stage flue gas recirculation low-NOx burner according to the present invention.

[0021] Figure 5 This is a schematic diagram of the baffle installation of a multi-stage flue gas recirculation low-NOx burner according to the present invention.

[0022] Figure 6 This is a schematic diagram of the heating tube installation of a multi-stage flue gas recirculation low-NOx burner according to the present invention.

[0023] Figure 7 This is a schematic diagram of the enclosure installation of a multi-stage flue gas recirculation low-NOx burner according to the present invention.

[0024] Figure 8 This is a schematic diagram of the installation of the drive plate of a multi-stage flue gas recirculation low-NOx burner according to the present invention.

[0025] Figure 9 This is a schematic diagram of the long sliding pin installation of a multi-stage flue gas recirculation low-NOx burner according to the present invention.

[0026] Figure 10 This is a schematic diagram of the enclosure installation of a multi-stage flue gas recirculation low-NOx burner according to the present invention.

[0027] Figure 11 This is a schematic diagram of the sealing plate installation of a multi-stage flue gas recirculation low-NOx burner according to the present invention.

[0028] Figure 12 This is a cross-sectional view of the secondary treatment box of a multi-stage flue gas recirculation low-NOx burner according to the present invention.

[0029] Figure 13 This is a schematic diagram of the installation of the inclined baffle in a multi-stage flue gas recirculation low-NOx burner according to the present invention.

[0030] Figure 14 This is a schematic diagram of the jet pipe installation of a multi-stage flue gas recirculation low-NOx burner according to the present invention.

[0031] Figure 15 This is a schematic diagram of the slide mounting of a multi-stage flue gas recirculation low-NOx burner according to the present invention.

[0032] Figure 16 This is a schematic diagram of the driven swing arm installation of a multi-stage flue gas recirculation low-NOx burner according to the present invention.

[0033] Numbering in the diagram: 1-Primary processing box, 2-Secondary processing box, 3-Inlet pipe, 4-Baffle plate, 5-Gathering port, 6-Heating pipe, 7-Negative pressure port, 8-Fan blade, 9-Side rail plate, 10-First motor, 11-Worm gear, 12-Worm wheel, 13-Drive plate, 14-Long keyway, 15-Long sliding pin, 16-L-shaped rail groove, 17-Square slider, 18-Vertical groove, 19-Horizontal groove, 20-Collection plate, 21-Shovel, 22-Surround plate, 23-Sealing plate, 24-Horizontal plate, 25-Clutch plate, 26-Inclined surface, 27-First sliding pin, 28-Inclined groove, 29-Static surface 30-Support leg, 31-Frame, 32-Second motor, 33-Transmission pipe, 34-Air outlet, 35-Third motor, 36-Bubble-breaking roller, 37-Inclined baffle, 38-Plug cap, 39-Belling pipe, 40-T-shaped pipe, 41-Center rod, 42-Active swing arm, 43-Short sliding pin, 44-Short keyway, 45-Disc, 46-Air jet pipe, 47-Crank, 48-Short connecting rod, 49-Slide seat, 50-Driven swing arm, 51-Sector-shaped rail plate, 52-Support, 53-Keyhole, 54-Second sliding pin, 55-Wave groove, 56-Communicating device. Detailed Implementation

[0034] The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0035] like Figure 1-16 As shown, the present invention provides a multi-stage flue gas recirculation low-NOx burner, including a primary treatment box 1 and a secondary treatment box 2. The primary treatment box 1 is L-shaped and open at the top. A partition 4 is provided in the middle of the primary treatment box 1 to divide the primary treatment box 1 and form a communicating vessel 56 at the bottom of the primary treatment box 1. A solid impurity removal device is provided at one end of the communicating vessel 56. The solid impurity removal device includes two synchronously rotating drive plates 13. A collection plate 20 for scraping the bottom wall of the communicating vessel 56 is provided on the inner side of the two drive plates 13. When the drive plates 13 rotate, the collection plate 20 can form a structure in which the collection plate 20 follows an L-shaped trajectory to collect dust along the bottom wall of the communicating vessel 56. The bottom of the secondary treatment box 2 is provided with two jet pipes 46 that are connected to the primary treatment box 1. The bottom of the secondary treatment box 2 is also provided with a rotatable disc 45. When the disc 45 rotates, the jet pipes 46 can form a structure in which they swing back and forth and alternately swing up and down.

[0036] like Figure 3-5 As shown in Figure 7, the primary treatment box 1 is L-shaped, with an open top and a sealed bottom. It is fixed to the inner wall of the primary treatment box 1 by a partition 4, forming a communicating vessel 56 at the bottom of the primary treatment box 1. By adding water or other liquid into the communicating vessel 56, the primary treatment box 1 can be sealed. Figure 4As shown in Figure 5, an air inlet pipe 3 is provided on one side of the lower end of the primary treatment box 1, that is, an air inlet pipe 3 is provided on one side of the lower end of the communicating vessel 56. By connecting the inlet end of the air inlet pipe 3 to the flue gas exhaust port of the low-NOx burner, the flue gas will enter the bottom of the communicating vessel 56 where it meets the water. Some water-soluble gases, such as dust in the flue gas, can remain or dissolve in the water. Since the flue gas is a gas, it will move upward under its own buoyancy and thus enter the secondary treatment box 2. The direction of the air inlet pipe 3 can also be set at the bottom of the communicating vessel 56, which can also play a role in purifying the flue gas. The secondary treatment box 2 contains a weak acid or weak alkali or other compound liquid, which can react with water-insoluble or other harmful gases in the flue gas. The installation and shape of the secondary treatment box 2 and the jet pipe 46 are as follows. Figure 13-15 As shown, the flue gas, connected by a pipe, re-enters the secondary treatment chamber 2, where it is ejected from the corresponding jet pipe 46. A rotatable disc 45 causes the jet pipe 46 to swing back and forth, alternating up and down, ensuring the flue gas is evenly sprayed onto the bottom of the secondary treatment chamber 2. This allows the gas to fully react with the chemical liquid, achieving purification. Through the primary treatment chamber 1 and the secondary treatment chamber 2, the flue gas undergoes multiple treatments before being released into the air, reducing air pollution. After a period of use, when excessive dust accumulates at the bottom of the communicating vessel 56… By using the solid impurity removal device, i.e., the corresponding drive plate 13 rotates, the collection plate 20 can be made to follow an L-shaped trajectory to collect dust along the bottom wall of the communicating vessel 56. When the drive plate 13 reverses, the collection plate 20 can be reset to the initial position, thereby centrally processing the dust. Through the cooperation of the communicating vessel 56 and the solid impurity removal device, the entire operation process is a sealed operation, reducing the risk of flue gas leakage. Moreover, the bottom of the communicating vessel 56 can be cleaned without stopping the machine, which not only improves efficiency but also reduces cost and the risk of flue gas leakage.

[0037] The first motor 10 is provided on the left and right end surfaces of the first processing box 1. The output end of the first motor 10 is fixedly connected to the worm gear 11. The upper end of the worm gear 11 is respectively engaged with the worm wheel 12. The drive plate 13 is coaxially fixedly connected to the corresponding worm wheel 12.

[0038] like Figure 8As shown, motor mounts are fixedly attached to the left and right ends of the primary processing box 1, and the first motor 10 is fixedly attached to the upper end of the corresponding motor mount, which supports and fixes the first motor 10. The function of the first motor 10 is to provide rotational power to the drive plate 13. The motor is existing technology and will not be described in detail. A bearing seat is rotatably connected to the outer surface of the worm gear 11. The bottom of the bearing seat is fixedly attached to the motor mount, which limits the stable rotation of the worm gear 11. A rotating shaft is fixedly attached to the inner wall of the worm wheel 12 and the drive plate 13. The rotating shaft passes through the primary processing box 1 and is rotatably connected to the inner wall of the primary processing box 1. When the first motor 10 is started, it can drive the worm gear 11, worm wheel 12 and drive plate 13 to rotate synchronously. Under the meshing of the worm wheel 12 and worm gear 11, the drive plate 13 has a self-locking function when it rotates to a certain position.

[0039] Side rail plates 9 are fixedly connected to the left and right sides of the bottom inner wall of the primary processing box 1. L-shaped rail grooves 16 are respectively opened on the side rail plates 9. Long sliding pins 15 are slidably connected to the inner walls of the L-shaped rail grooves 16. Long keyways 14 that cooperate with the corresponding long sliding pins 15 are respectively opened on the drive plate 13. Square sliders 17 that are slidably connected to the corresponding side rail plates 9 are fixedly connected to the middle part of the outer surface of the long sliding pins 15. The collection plate 20 is installed inside the two long sliding pins 15.

[0040] like Figure 7-10 As shown, the long sliding pin 15 can move within the L-shaped rail groove 16, and can also move within the long keyway 14. When the drive plate 13 rotates, the long sliding pin 15 can be driven to move along the inner wall of the L-shaped rail groove 16 through the engagement of the long keyway 14 and the long sliding pin 15. An L-shaped groove is provided on the side rail plate 9, and a corresponding square slider 17 is slidably connected to the inner wall of the L-shaped groove. The square slider 17 slidably connected to the inner wall of the L-shaped groove can limit the rotation of the long sliding pin 15, that is, limit the rotation of the corresponding collecting plate 20, keeping the collecting plate 20 always horizontal and preventing deflection. The L-shaped rail groove 16 is divided into two ends: a vertical groove 18 and a horizontal groove 19. Figure 9 As shown, when the long sliding pin 15 is engaged in the vertical groove 18, when the drive plate 13 rotates, it will drive the long sliding pin 15 and the collecting plate 20 to move downward through engagement with the long sliding pin 15. When the drive plate 13 continues to rotate and the long sliding pin 15 moves downward to the bottom of the vertical groove 18, that is, when the corresponding long sliding pin 15 enters the horizontal groove 19, the corresponding collecting plate 20 will move downward to contact the bottom wall of the primary processing box 1. When the drive plate 13 continues to rotate, the long sliding pin 15 and the collecting plate 20 will move backward, so that the collecting plate 20 can clean and remove impurities from the bottom wall of the primary processing box 1, that is, the communicating vessel 56. When the drive plate 13 reverses and resets, the corresponding collecting plate 20 can reverse and reset, and the dust on the collecting plate 20 can be centrally processed.

[0041] A surrounding plate 22 is fixedly connected to the outer periphery of the upper surface of the collecting plate 20. The surrounding plate 22 is fixedly connected to the inner end face of two long sliding pins 15. A shovel 21 is provided at the rear end of the collecting plate 20. A sealing plate 23 is slidably connected to the inner wall of the rear end of the surrounding plate 22. The lower end of the sealing plate 23 is provided with an inclined surface 26 that cooperates with the shovel 21. A horizontal plate 24 is fixedly connected to the upper surface of the surrounding plate 22. A clutch plate 25 that cooperates with the sealing plate 23 is slidably connected to the middle of the lower surface of the horizontal plate 24. A first sliding pin 27 is fixedly connected to the inner wall of the middle part of the sealing plate 23. A clutch groove that engages with the first sliding pin 27 is provided on the inner wall of the clutch plate 25.

[0042] like Figure 10-11 As shown, the collection plate 20, the surrounding plate 22, and the sealing plate 23 are installed and shaped as follows: Figure 10 As shown, multiple through holes are provided for filtering water, allowing water and dust to separate when the collecting plate 20 moves upward. The collecting plate 20, surrounding plate 22, and sealing plate 23 form a sealed space with an open top for holding dust. Under the limiting position of the clutch plate 25, the sealing plate 23 normally keeps the lower front side of the sealed space open. The sealing plate 23 can slide vertically to the inner wall of the front end of the surrounding plate 22, and the clutch plate 25 can slide back and forth to the inner wall of the horizontal plate 24. The installation and shape of the clutch groove and the first sliding pin 27 are as follows... Figure 11As shown, the clutch groove is divided into an inclined groove 28 and two stationary grooves 29. When the clutch plate 25 moves forward relative to the sealing plate 23, the clutch groove, under the engagement of the inclined groove 28 and the first sliding pin 27, causes the first sliding pin 27 and the sealing plate 23 to move downward. When the sealing plate 23 moves downward to the bottom, the corresponding inclined surface 26 contacts the scraper 21. At this time, the upper end of the corresponding collection plate 20 is a sealed space, and no dust will flow out when it is filled. Through the stationary groove 29, when the first sliding pin 27 is engaged in the corresponding stationary groove 29 section, the corresponding sealing plate 23 will have a stable stationary state. Since the sealing plate 23 is under its own weight and the stationary groove 29 is horizontal, the sealing plate 23 will not move upward or downward. When the long sliding pin 15 moves, it drives the surrounding plate 22, the collection plate 20, the sealing plate 23, etc. to move synchronously to collect dust. During collection, the shovel 21 can collect the dust on the bottom wall of the primary treatment box 1. When the collection plate 20 and the sealing plate 23 move backward so that the corresponding clutch plate 25 contacts the inner wall of the rear end of the primary treatment box 1, the clutch plate 25 is blocked from moving forward. At this time, if the corresponding collection plate 20, the surrounding plate 22, the sealing plate 23, etc. continue to move forward, the clutch plate 25 will move forward relative to the sealing plate 23. That is, at this time, the sealing plate 23 will move downward under the engagement of the first sliding pin 27, sealing the rear end of the collection plate 20 and preventing the dust from moving out of the collection plate 20 when the collection plate 20 is reset to the front upper side. When the collection plate 20 is reset to the top position, the dust can be centrally processed. By pushing the clutch plate 25 forward, the corresponding sealing plate 23 can be reset again. This cycle is repeated continuously and will not be described in detail.

[0043] The clutch groove includes a slanted groove 28 and two stationary grooves 29 connected to both ends of the slanted groove 28. When the first sliding pin 27 engages with the corresponding stationary groove 29, the sealing plate 23 is in a stationary state. When the first sliding pin 27 engages with the corresponding slanted groove 28, the sealing plate 23 is in a moving state.

[0044] like Figure 11 As shown, when the first sliding pin 27 is in the stationary groove 29, the first sliding pin 27 and the clutch plate 25 can keep the clutch plate 23 stationary when they are not under force, that is, in the normal state they are stationary; when the clutch plate 25 is under force, it will break the parallel forward movement and make the first sliding pin 27 engage with the inclined groove 28, at which time the corresponding clutch plate 23 can move downward.

[0045] The upper inner wall of the primary processing box 1 is fixedly connected to a negative pressure port 7, and the inner wall of the negative pressure port 7 is provided with a rotatable fan blade 8. The upper inner wall of the primary processing box 1 is also provided with a heating tube 6. The top surface of the primary processing box 1 is fixedly connected to a gathering port 5, and the upper end of the gathering port 5 is fixedly connected to a transmission tube 33. The other end of the transmission tube 33 is connected to the inner wall of the secondary processing box 2.

[0046] like Figure 4-6 As shown, a motor is also installed at the negative pressure port 7, and the fan blade 8 is fixed to the output end of the motor. When the motor is driven, it can drive the fan blade 8 to rotate. When the fan blade 8 rotates, it can create a negative pressure at the other end of the communicating vessel 56, thereby facilitating the flow of flue gas from the other end of the communicating vessel 56; the heating tube 6 is installed and shaped as follows. Figure 5-6 As shown, the heating tube 6 is connected to a heat source at both ends, which can heat the flue gas after primary filtration, making the molecules in the flue gas in an active state, and then enter the secondary treatment box 2 through the transmission tube 33 to accelerate the reaction rate.

[0047] The second motor 32 is fixedly connected to the lower surface of the secondary processing box 2. The disc 45 is fixedly connected to the output end of the second motor 32. The inner wall of the bottom of the secondary processing box 2 is rotatably connected to the central support rod 41. The lower end of the outer surface of the central support rod 41 is fixedly connected to the active swing arm 42. The upper end of the active swing arm 42 is provided with a short keyway 44. The upper surface of the disc 45 is hinged with a short sliding pin 43 that cooperates with the short keyway 44 at the non-center position. The jet pipe 46 is installed on the upper end of the central support rod 41.

[0048] like Figure 12-14 As shown, the function of the second motor 32 is to provide rotational power for the disk 45; the active swing arm 42, the central upright rod 41, and the short sliding pin 43 are installed and shaped as follows. Figure 14 As shown, when the disc 45 rotates, it can drive the corresponding short sliding pin 43 to rotate in a circle. When the short sliding pin 43 rotates in a circle, it will drive the corresponding active swing arm 42 and the central rod 41 to swing back and forth through meshing with the short keyway 44, thereby driving the corresponding jet pipe 46 to swing back and forth.

[0049] A T-shaped tube 40 is fixedly connected to the upper surface of the central upright rod 41. The jet pipes 46 are rotatably connected to the front and rear ends of the T-shaped tube 40. Cranks 47 are fixedly connected to the outer surface of the jet pipes 46. A driven swing arm 50 is fixedly connected to the middle of the outer surface of the central upright rod 41. A slide block 49 is slidably connected to the upper surface of the driven swing arm 50. Short connecting rods 48 are hinged to the front and rear sides of the upper end of the slide block 49. The other end of the short connecting rods 48 is hinged to the corresponding cranks 47. A second sliding pin 54 is fixedly connected to the lower surface of the slide block 49. A fan-shaped rail plate 51 is provided at the lower end of the driven swing arm 50. A wave groove 55 that cooperates with the second sliding pin 54 is opened on the upper surface of the fan-shaped rail plate 51.

[0050] like Figure 14-16As shown, a support 52 is fixedly connected to the inner wall of the bottom of the secondary processing box 2. A sector-shaped rail plate 51 is fixedly connected to the inner wall of the support 52 and is also installed at the lower end of the driven swing arm 50. When the active swing arm 42 and the central rod 41 rotate, they can drive the driven swing arm 50 to swing synchronously. A bellows 39 is connected to the inlet of the T-shaped tube 40. The inlet of the bellows 39 is connected to the transmission pipe 33, so that the gas is ejected from the jet pipe 46. The T-shaped tube 40, crank 47, short connecting rod 48, slide 49, and driven swing arm 50 are installed and shaped as follows: Figure 15 As shown, the slide 49 can slide left and right on the upper surface of the driven rocker arm 50; when the slide 49 moves left and right, it drives the corresponding crank 47 through the short connecting rod 48, thereby enabling the jet pipe 46 to swing up and down alternately. A keyhole 53 is provided on the upper surface of the driven rocker arm 50, through which the second sliding pin 54 can move back and forth. The installation and shape of the wave groove 55 are as shown. Figure 16 As shown, when the driven swing arm 50 drives the corresponding slide 49 to swing back and forth, the slide 49 will drive the corresponding second sliding pin 54 to swing back and forth. When the second sliding pin 54 swings back and forth, it will cause the second sliding pin 54 and the slide 49 to move back and forth through meshing with the wave groove 55. This will cause the corresponding jet pipe 46 to swing back and forth and also swing up and down alternately, so that the flue gas is evenly sprayed out from the bottom of the secondary treatment box 2.

[0051] The inner wall of the secondary processing box 2 is fixed with a plurality of inclined baffles 37, and each inclined baffle 37 is provided with a rotatable bubble-breaking roller 36 at its end.

[0052] like Figure 12-13 As shown, the top of the secondary treatment tank 2 is fixed with an air outlet 34, which allows the purified gas to flow out from a designated location for easy collection and testing. The bottom of the secondary treatment tank 2 has a drain hole with a plug cap 38 on its inner wall to seal the device and discharge waste liquid. The installation and shape of the inclined baffle 37 are as shown. Figure 12-13 As shown, by tilting the baffle 37, the residence time of the smoke bubbles in the secondary treatment box 2 can be increased, that is, the residence time in the reaction solution, so that the flue gas is purified more cleanly. Multiple third motors 35 are fixedly connected to one end face of the secondary treatment box 2, and the bubble-breaking roller 36 is fixedly connected to the output end of the third motor 35. The third motor 35 is used to drive the bubble-breaking roller 36 to rotate. Since the gas will rise under its own buoyancy, it will be blocked by the baffle 37. When the gas rises in the solution, it will gradually rise along the high side of the baffle 37. Since the smoke bubbles will meet the bubble-breaking roller 36 when they rise, the bubble-breaking roller 36 will break the bubbles when it rotates. After the bubbles are broken, the contact area with the solution can be increased, further improving the reaction rate.

[0053] A frame 31 is fixedly connected to the lower end of the outer surface of the secondary processing box 2, and support legs 30 are fixedly connected to each corner of the frame 31.

[0054] like Figure 11 As shown, the support leg 30 and frame 31 are used to support and fix the secondary processing box 2.

[0055] In use, by connecting the inlet end of the air inlet pipe 3 to the flue gas exhaust port of the low-NOx burner, the flue gas enters the bottom of the communicating vessel 56 where it meets the water. Some water-soluble gases, such as dust, in the flue gas can remain or dissolve in the water. Since the flue gas is gaseous, it rises due to its own buoyancy and enters the secondary treatment tank 2. The secondary treatment tank 2 contains a weak acid, weak alkali, or other compound liquid, which can react with water-insoluble or other harmful gases in the flue gas. After a period of use, when there is excessive dust at the bottom of the communicating vessel 56, a solid impurity removal device is activated. This device works when the first motor 10 is started, causing the collection plate 20 to follow an L-shaped trajectory along the bottom wall of the communicating vessel 56 to collect dust. The communication vessel 56 and the solid impurity removal device... The combined use of the device ensures a sealed operation throughout the entire process, reducing the risk of flue gas leakage. It also allows for dust removal from the bottom of the communicating vessel 56 without shutting down the machine, improving efficiency, reducing costs, and minimizing the risk of leakage. Inside the secondary treatment box 2, the second motor 32, corresponding to the rotating disc 45, causes the jet pipe 46 to oscillate back and forth while alternating up and down, ensuring the flue gas is evenly sprayed onto the bottom of the secondary treatment box 2. This allows the gas to fully react with the chemical solution, achieving purification. Through the primary treatment box 1 and the secondary treatment box 2, the flue gas can be treated multiple times before being released into the air, reducing air pollution. The inclined baffle 37 and the bubble-breaking roller 36 extend the residence time of the flue gas in the solution and increase the reaction rate, resulting in cleaner flue gas purification.

[0056] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A multi-stage flue gas treatment device, comprising a primary treatment chamber (1) and a secondary treatment chamber (2), characterized in that: The primary treatment box (1) is L-shaped and open at the top. A partition (4) is provided in the middle of the primary treatment box (1) to divide it and form a communicating vessel (56) at the bottom. An air inlet pipe (3) is provided on one side of the lower end of the communicating vessel (56). The inlet end of the air inlet pipe (3) is connected to the flue gas exhaust port of the low-NOx burner. A solid impurity removal device is provided at one end of the communicating vessel (56). The solid impurity removal device includes two synchronously rotating drive plates (13). The inner sides of the two drive plates (13) are provided with… There is a collection plate (20) for cleaning the bottom wall of the communicating vessel (56). When the drive plate (13) rotates, the collection plate (20) can form an L-shaped trajectory to collect dust along the bottom wall of the communicating vessel (56). The bottom of the secondary treatment box (2) is provided with two jet pipes (46) that are connected to the air outlet pipe of the primary treatment box (1). The bottom of the secondary treatment box (2) is also provided with a rotatable disc (45). When the disc (45) rotates, the two jet pipes (46) can form a structure in which the two jet pipes (46) swing back and forth and swing up and down alternately. The bottom inner wall of the primary processing box (1) is fixed with side rail plates (9) on both sides. L-shaped rail grooves (16) are opened on the side rail plates (9). Long sliding pins (15) are slidably connected to the inner wall of the L-shaped rail grooves (16). The collection plate (20) is installed inside the two long sliding pins (15). A surrounding plate (22) is fixed to the outer periphery of the upper surface of the collection plate (20). The surrounding plate (22) is fixed to the inner end face of the two long sliding pins (15). A shovel (21) is opened at the rear end of the collection plate (20). A sealing plate (23) is slidably connected to the inner wall of the rear end of the surrounding plate (22). The lower end of the sealing plate (23) is provided with an inclined surface that cooperates with the shovel (21). 26) A horizontal plate (24) is fixedly connected to the upper surface of the enclosure (22). A clutch plate (25) that cooperates with the sealing plate (23) is slidably connected to the middle of the lower surface of the horizontal plate (24). A first sliding pin (27) is fixedly connected to the inner wall of the middle part of the sealing plate (23). A clutch groove that meshes with the first sliding pin (27) is opened on the inner wall of the clutch plate (25). The clutch groove includes an inclined groove (28) and two stationary grooves (29) connected to both ends of the inclined groove (28). When the first sliding pin (27) meshes with the corresponding stationary groove (29), the sealing plate (23) is in a stationary state. When the first sliding pin (27) meshes with the corresponding inclined groove (28), the sealing plate (23) is in a moving state.

2. The multi-stage flue gas treatment device as described in claim 1, characterized in that: The first-stage processing box (1) is provided with a first motor (10) on the left and right ends respectively. The output end of the first motor (10) is fixedly connected to a worm (11). The upper end of the worm (11) is meshed with a worm wheel (12). The drive plate (13) is coaxially fixedly connected to the corresponding worm wheel (12).

3. The multi-stage flue gas treatment device as described in claim 1, characterized in that: The drive plate (13) is provided with long keyways (14) that cooperate with the corresponding long sliding pins (15). The outer surface of the long sliding pins (15) is fixed with square sliders (17) that are slidably connected to the corresponding side rails (9).

4. The multi-stage flue gas treatment device as described in claim 1, characterized in that: The upper inner wall of the primary processing box (1) is fixed with a negative pressure port (7), and the inner wall of the negative pressure port (7) is provided with a rotatable fan blade (8). The upper inner wall of the primary processing box (1) is also provided with a heating pipe (6). The top surface of the primary processing box (1) is fixed with a gathering port (5), and the upper end of the gathering port (5) is fixed with a transmission pipe (33). The other end of the transmission pipe (33) is connected to the inner wall of the secondary processing box (2).

5. The multi-stage flue gas treatment device as described in claim 1, characterized in that: The second motor (32) is fixedly connected to the lower surface of the secondary processing box (2), and the disc (45) is fixedly connected to the output end of the second motor (32). The inner wall of the bottom end of the secondary processing box (2) is rotatably connected to the central rod (41). The lower end of the outer surface of the central rod (41) is fixedly connected to the active swing arm (42). The upper end of the active swing arm (42) is provided with a short keyway (44). The upper surface of the disc (45) is hinged with a short sliding pin (43) that cooperates with the short keyway (44) at the non-center position. The jet pipe (46) is installed on the upper end of the central rod (41).

6. The multi-stage flue gas treatment device as described in claim 5, characterized in that: The upper surface of the central rod (41) is fixed with a T-shaped tube (40), and the jet pipe (46) is rotatably connected to the front and rear ends of the T-shaped tube (40). Cranks (47) are fixed on the outer surface of the jet pipe (46). A driven swing arm (50) is fixed in the middle of the outer surface of the central rod (41). A slide block (49) is slidably connected to the upper surface of the driven swing arm (50). Short connecting rods (48) are hinged to the front and rear sides of the upper end of the slide block (49). The other end of the short connecting rods (48) is hinged to the corresponding cranks (47). A second sliding pin (54) is fixed to the lower surface of the slide block (49). A fan-shaped rail plate (51) is provided at the lower end of the driven swing arm (50). A wave groove (55) that cooperates with the second sliding pin (54) is opened on the upper surface of the fan-shaped rail plate (51).

7. The multi-stage flue gas treatment device as described in claim 1, characterized in that: The inner wall of the secondary processing box (2) is fixed with multiple inclined baffles (37), and each inclined baffle (37) is provided with a rotatable bubble-breaking roller (36) at its end.

8. The multi-stage flue gas treatment device as described in claim 1, characterized in that: The lower end of the outer surface of the secondary processing box (2) is fixed with a frame (31), and each corner of the frame (31) is fixed with a support leg (30).

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