A self-cleaning heat exchange device for preventing blockage in high-temperature flue gas waste heat recovery of a glass kiln

Abstract

The application discloses a kind of glass kiln high-temperature flue gas waste heat recovery with anti-blocking self-cleaning heat exchange device, belong to waste heat recovery device technical field, it includes main body shell, the main body shell is cylindrical and both ends are tapered convergence, the both ends of the main body shell are respectively welded with gas inlet and gas outlet, flange plate for connecting pipeline is set on the gas inlet and gas outlet.The application is provided with smoke dust preliminary screening mechanism, and the inertia impact separation of large particle dust is carried out by adjustable wing-shaped guide vane, and self-cleaning is realized by means of the reverse pressure wave generated by periodic quick closing, which effectively prevents the accumulation of smoke dust at the inlet.Secondly, the staggered arrangement of high-temperature corrugated baffle prolongs the flue gas path and promotes the natural sedimentation of dust.The linkage flap mechanism uses the power of the preliminary screening mechanism to synchronously drive the baffle to periodically turn over, so that the baffle alternately bears the impact of flue gas on both sides, significantly prolonging the service life of the baffle.

Description

Technical Field

[0001] This invention belongs to the technical field of waste heat recovery devices, specifically a self-cleaning heat exchanger for high-temperature flue gas waste heat recovery in glass kilns. Background Technology

[0002] High-temperature flue gas from glass furnaces refers to the waste gas containing a large amount of heat energy discharged from the furnace during the glass melting process. Its temperature typically reaches 400–600℃, and it contains solid particulate matter such as silica dust and alkali metal oxides. Waste heat recovery devices (such as heat exchangers and waste heat boilers) are used to recover this heat energy to preheat combustion air or generate steam, thereby reducing fuel consumption and production costs. Removing impurities from the flue gas is of great significance: it effectively prevents particulate matter from depositing and clogging heat exchange surfaces, ensuring stable heat exchange efficiency, reducing equipment corrosion and wear, extending the maintenance cycle and service life of the equipment, and simultaneously reducing exhaust gas temperature and pollutant emissions.

[0003] In existing technologies, high-temperature flue gas waste heat recovery devices for glass kilns have the following main shortcomings: First, there is a lack of active flue gas pretreatment methods, allowing a large amount of solid particles to directly enter the heat exchanger, leading to rapid ash accumulation and blockage on the heat exchange surface, resulting in a significant decrease in heat exchange efficiency; second, traditional ash removal methods (such as mechanical vibration and steam blowing) are mostly passive remedies, with limited effectiveness on glass kiln dust that is highly viscous and contains alkali metals, and are prone to damaging the equipment; third, the heat exchanger maintenance cycle is short, manual ash removal is frequent, and furnace shutdown is often required, resulting in high operating costs and short equipment lifespan; fourth, existing devices do not have a structure for self-cleaning and alternating operation of baffles on both sides, making it difficult for accumulated ash to fall off automatically, resulting in poor long-term operational reliability. Summary of the Invention

[0004] To overcome the above-mentioned defects, the present invention provides a self-cleaning heat exchanger for high-temperature flue gas waste heat recovery in glass kilns, which solves the problems of easy clogging and short maintenance cycle of heat exchangers caused by excessive solid particulate impurities in the high-temperature flue gas of existing glass kilns.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a self-cleaning heat exchanger for high-temperature flue gas waste heat recovery in glass kilns, comprising: The main body shell is cylindrical with tapered ends. An air inlet port and an air outlet port are welded to both ends of the main body shell. Flanges for connecting pipes are provided on both the air inlet port and the air outlet port. A dust screening mechanism is provided inside the air inlet port. The bottom of the main body shell is designed with an opening, and two arc-shaped sealing plates are hinged at the opening. A dust collection box is fixedly connected to the bottom of the main body shell at the position corresponding to the arc-shaped sealing plate. The dust collection box is used to collect solid particles in the dust. The bottom of the dust collection box is a conical design. Multiple exhaust ports are opened at the bottom of the dust collection box. A flap valve is installed on the exhaust port to control the opening and closing of the exhaust port flow channel.

[0006] The partitions are arranged at equal intervals and in an alternating manner inside the main body shell. The partitions are rotatably connected to the main body shell. The partitions are made of high-temperature resistant alloy corrugated plates and are used to block dust particles in the flue gas. The main body shell has a linkage flap mechanism with the same number of partitions on both sides.

[0007] As a further aspect of the present invention: spring telescopic rods are rotatably connected to the inner walls on both sides of the dust collection box, and the output end of the spring telescopic rods is rotatably connected to the bottom of the arc-shaped sealing plate on the corresponding side.

[0008] As a further aspect of the present invention: the spring telescopic rod includes a telescopic rod and a compression spring disposed within its main body, wherein the two ends of the compression spring abut against the bottom of the main body and the output end of the telescopic rod, respectively.

[0009] As a further embodiment of the present invention: the dust screening mechanism includes an adjustment seat disposed in the air inlet port, a plurality of wing-shaped guide plates are rotatably connected at equal intervals on the side wall of the adjustment seat, a conical guide hood is disposed at one end of the adjustment seat, and a servo motor is disposed at one end of the adjustment seat corresponding to the conical guide hood.

[0010] As a further embodiment of the present invention: a main bevel gear is rotatably connected to the bottom of the adjusting seat, and multiple secondary bevel gears are rotatably connected at equal intervals on the inner wall of the adjusting seat. The main bevel gear and the secondary bevel gear mesh with each other. The output end of the servo motor passes through the adjusting seat and is drivenly connected to the main bevel gear. The rotating shaft of the wing-shaped guide plate is drivenly connected to the secondary bevel gear.

[0011] As a further embodiment of the present invention: a commutator A is also provided in the air intake port, the transmission shaft of the main bevel gear is connected to the commutator A, and connecting shafts are connected to both sides of the commutator A. When the main bevel gear shaft rotates, it drives the two connecting shafts to rotate through the commutator A. Commutators B are connected to both sides of the air intake port through brackets. The commutator B is connected to the connecting shaft, and a linkage shaft is also provided on the commutator B. The connecting shaft drives the linkage shaft to rotate through the commutator B.

[0012] As a further embodiment of the present invention: the linkage flipping mechanism includes multiple mounting brackets fixedly connected to the side walls of both sides of the main body shell, a drive box fixedly connected to the mounting bracket, a worm gear rotatably connected inside the drive box, the linkage shaft passing through multiple drive boxes on the corresponding side and being driven by the worm gear, a main gear and a secondary gear rotatably connected inside the drive box, and the partition rotating shaft being driven by the secondary gear inside the drive boxes on both sides.

[0013] As a further embodiment of the present invention: a worm gear is rotatably connected inside the drive box, the worm gear meshes with the worm, the worm gear is connected to the main gear through a one-way bearing, and the main gear meshes with the secondary gear.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: First, the primary dust screening mechanism utilizes adjustable wing-shaped guide vanes to separate large dust particles through inertial impaction, and achieves self-cleaning through the reverse pressure wave generated by periodic rapid closure, effectively preventing dust accumulation at the inlet. Second, staggered high-temperature resistant corrugated baffles extend the flue gas path, promoting natural dust settling. The linked flip-plate mechanism uses the power of the primary screening mechanism to synchronously drive the baffles to periodically flip, allowing them to alternately withstand flue gas impacts on both sides, significantly extending the baffles' service life. Finally, the bottom arc-shaped sealing plate, combined with a spring telescopic rod, automatically opens and closes to discharge ash based on the weight of accumulated ash. Combined with the periodic ash unloading design of the dust collection box, this ensures the continuous and stable operation of the entire device. Overall, this device significantly reduces the solid particulate matter content entering the heat exchanger, reduces the frequency of manual cleaning and the risk of heat exchanger blockage, thereby improving the heat exchange efficiency, operational reliability, and economy of the waste heat recovery system. It is particularly suitable for treating flue gas from glass kilns under high-temperature and high-dust conditions. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional internal structure diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the dust screening mechanism of the present invention; Figure 4 This is a three-dimensional internal structure diagram of the adjustment seat of the present invention; Figure 5 This is a three-dimensional internal structure diagram of the dust collection box of the present invention; Figure 6 This is a three-dimensional structural diagram of the linkage flip-plate mechanism of the present invention.

[0016] In the diagram: 1. Main body shell; 2. Air inlet port; 3. Air outlet port; 4. Primary dust screening mechanism; 5. Arc-shaped sealing plate; 6. Dust collection box; 7. Exhaust port; 8. Flip valve; 9. Partition plate; 10. Linkage flip mechanism; 11. Spring telescopic rod; 41. Adjustment seat; 42. Wing-shaped guide plate; 43. Conical guide shroud; 44. Servo motor; 45. Main bevel gear; 46. Driven bevel gear; 12. Commutator A; 13. Connecting shaft; 14. Commutator B; 15. Linkage shaft; 101. Mounting bracket plate; 102. Drive box; 103. Worm gear; 104. Main gear; 105. Secondary gear; 106. Worm wheel. Detailed Implementation

[0017] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0018] Example 1, referring to Figures 1-2 This is the first embodiment of the present invention. This embodiment provides a self-cleaning heat exchanger for high-temperature flue gas waste heat recovery in glass kilns. It is connected between the kiln flue and the heat exchanger to collect solid particulate matter from the flue gas discharged from the flue, reduce the impurity content of the flue gas received by the heat exchanger, improve the heat exchange efficiency of the heat exchanger, and reduce maintenance costs. It includes: a main shell 1, which is cylindrical and tapered at both ends. An air inlet port 2 and an air outlet port 3 are welded to the two ends of the main shell 1, respectively. Flanges for connecting pipes are provided on both the air inlet port 2 and the air outlet port 3. A dust screening mechanism 4 is provided inside the air inlet port 2. The bottom of the main shell 1 is designed to be open, and two arc-shaped sealing plates 5 are hinged at the opening. The air inlet port 2 is connected to the flue of the kiln, and the air outlet port 3 is connected to the heat exchanger.

[0019] The dust collection box 6 is fixedly connected to the bottom of the main body shell 1 at the position corresponding to the arc-shaped sealing plate 5. The dust collection box 6 is used to collect solid particles in the dust. The bottom of the dust collection box 6 is a conical design. Multiple exhaust ports 7 are opened at the bottom of the dust collection box 6. A flap valve 8 is installed on the exhaust port 7 to control the flow of the exhaust port 7. Spring telescopic rods 11 are rotatably connected to the inner walls on both sides of the dust collection box 6. The output end of the spring telescopic rod 11 is rotatably connected to the bottom of the arc-shaped sealing plate 5 on the corresponding side. The spring telescopic rod 11 includes a telescopic rod and a compression spring set in its main body. The two ends of the compression spring abut against the bottom of the main body and the output end of the telescopic rod, respectively.

[0020] The generated smoke and dust fall from the arc-shaped sealing plate 5 into the smoke and dust collection box 6. When there is no force above the arc-shaped sealing plate 5, the two arc-shaped sealing plates 5 are affected by their own weight, and there is a gap between them to allow dust to pass through. When a lot of dust accumulates on the arc-shaped sealing plate 5, the weight of the arc-shaped sealing plate 5 and the dust overcomes the elastic force of the spring telescopic rod 11, and the two arc-shaped sealing plates 5 open, allowing all the dust to fall into the smoke and dust collection box 6. By opening the flap valve 8 on the exhaust port 7, a large amount of accumulated dust in the smoke and dust collection box 6 can be discharged.

[0021] The partition 9, with multiple partitions 9 arranged at equal intervals and in an alternating manner, is rotatably connected to the main body shell 1. The partition 9 is a high-temperature resistant alloy corrugated plate used to block dust particles in the flue gas. The main body shell 1 has a linkage flap mechanism 10 on both sides, with the same number of partitions 9.

[0022] The staggered arrangement of baffles 9 can extend the flow path of flue gas in the device and reduce the flow rate, thereby extending the residence time of the flue gas and providing more time for dust blocking. The texture on the surface of baffles 9 can make it easier for dust to stay.

[0023] Example 2, refer to Figures 3-5 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a heat exchange device for high-temperature flue gas waste heat recovery in glass kilns, including an anti-clogging self-cleaning device and its dust screening mechanism 4. The dust screening mechanism 4 includes an adjusting seat 41 disposed in the air inlet port 2. Multiple wing-shaped guide plates 42 are rotatably connected at equal intervals on the side wall of the adjusting seat 41. A conical guide hood 43 is disposed at one end of the adjusting seat 41. A servo motor 44 is disposed at one end of the adjusting seat 41 corresponding to the conical guide hood 43. A main bevel gear 45 is rotatably connected to the bottom of the adjusting seat 41. Multiple driven bevel gears 46 are rotatably connected at equal intervals on the inner wall of the adjusting seat 41. The main bevel gear 45 and the driven bevel gears 46 mesh with each other. The output end of the servo motor 44 passes through the adjusting seat 41 and is connected to the main bevel gear 45. The rotating shaft of the wing-shaped guide plate 42 is connected to the driven bevel gear 46.

[0024] The conical guide hood 43 evenly distributes the flue gas flow channel to each wing-shaped guide plate 42. When blocking ash from the flue gas, the servo motor 44 controls the main gear 104 to rotate, causing each slave bevel gear 46 to rotate, thereby synchronously adjusting each wing-shaped guide plate 42. The wing-shaped guide plate 42 can be adjusted to 30° with the flue gas flow direction at one time, which is the maximum adjustment range. The high-temperature flue gas carries a large number of dust particles that collide with the surface of the wing-shaped guide plate 42. Due to inertia, the large dust particles change direction, decelerate, and slide down the surface of the wing-shaped guide plate 42. Driven by the flow velocity in the channel, they eventually flow to the position of the arc-shaped sealing plate 5. When the pressure difference between the inlet and outlet of the heat exchanger reaches the set value or the timer cycle is reached, the servo motor 44 quickly drives the wing-shaped guide plate 42 to rotate to 90°, completely closing the flue gas channel. After closure, the flue gas upstream of the device flows through a bypass flue or is temporarily pressurized. At the instant the wing-shaped guide vane 42 closes, the originally high-speed flue gas is suddenly obstructed, forming a brief high-pressure backwash wave in front of the wing-shaped guide vane 42. This pressure wave will impact the wing-shaped guide vane 42 itself, as well as the flue and heat exchanger inlet tube bundle connected to it, effectively loosening and blowing off the dust adhering to the wing-shaped guide vane 42 or the inner wall of the device. When the wing-shaped guide vane 42 is closed, the upstream flue gas is in a pressurized state, and the pressure will press the arc-shaped sealing plate 5, making it tightly closed. When the wing-shaped guide vane 42 opens, the entire system returns to negative pressure, and the arc-shaped sealing plate 5 reopens, expelling the accumulated dust.

[0025] The rest of the structure is the same as in Example 1.

[0026] Example 3, referring to Figure 6 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a self-cleaning heat exchange device for high-temperature flue gas waste heat recovery in glass kilns, a linkage flap mechanism 10, and a linkage structure with a dust screening mechanism 4. It includes: a commutator A12 is also provided in the air inlet port 2. The transmission shaft of the main bevel gear 45 is connected to the commutator A12. Both sides of the commutator A12 are connected to the connecting shafts 13. When the shaft of the main bevel gear 45 rotates, it drives the two connecting shafts 13 to rotate through the commutator A12. Both sides of the air inlet port 2 are connected to the commutator B14 through the bracket. The commutator B14 is connected to the connecting shafts 13, and a linkage shaft 15 is also provided on the commutator B14. The connecting shaft 13 drives the linkage shaft 15 to rotate through the commutator B14. When the servo motor 44 drives the main bevel gear 45 to rotate, the main bevel gear 45 transmits power to the linkage shaft 15 through the commutator A12, the connecting shaft 13, and the commutator B14.

[0027] The linkage flipping mechanism 10 includes multiple mounting plates 101 fixedly connected to the side walls of both sides of the main body shell 1. A drive box 102 is fixedly connected to the mounting plate 101. A worm gear 103 is rotatably connected inside the drive box 102. A linkage shaft 15 passes through multiple drive boxes 102 on the corresponding side and is connected to the worm gear 103 for transmission. A main gear 104 and a secondary gear 105 are rotatably connected inside the drive box 102. The rotating shaft of the partition 9 is connected to the secondary gear 105 inside the drive boxes 102 on both sides for transmission. A worm wheel 106 is also rotatably connected inside the drive box 102. The worm wheel 106 meshes with the worm gear 103. The worm wheel 106 is connected to the main gear 104 through a one-way bearing. The main gear 104 meshes with the secondary gear 105.

[0028] The rotation of the linkage shaft 15 synchronously drives the worm gear 103 to rotate, and the worm wheel 106 meshing with the worm gear 103 can then rotate. The rotation of the worm wheel 106 causes the main gear 104 connected to it via a one-way bearing to rotate. Each time the wing-shaped guide plate 42 is deployed and reset, the main gear 104 will rotate, thereby causing the secondary gear 105 meshing with it to rotate. The gear ratio of the main gear 104 to the secondary gear 105 is two. The rotation of the secondary gear 105 will cause the partition plate 9 inside the main body shell 1 to rotate 90°. After the partition plate 9 is rotated, the side that does not collide with the flue gas can face the side where the flue gas flows. The service life of the partition plate 9 is greatly increased, the maintenance cycle is doubled compared to the single-sided type, and no other inconveniences are caused.

[0029] It should be noted that, since the flue gas discharged from the kiln flue is extremely hot, the servo motor 44 and other transmission components installed in the main body shell 1 in this invention are all designed to withstand high temperatures.

[0030] The rest of the structure is the same as in Example 2.

[0031] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A self-cleaning, anti-clogging heat exchanger for high-temperature flue gas waste heat recovery in glass kilns, characterized in that, include: The main body shell (1) is cylindrical and tapered at both ends. The two ends of the main body shell (1) are respectively welded with an air inlet port (2) and an air outlet port (3). Both the air inlet port (2) and the air outlet port (3) are provided with flanges for connecting pipes. The air inlet port (2) is provided with a dust screening mechanism (4). The bottom of the main body shell (1) is designed with an opening, and two arc-shaped sealing plates (5) are hinged at the opening. A dust collection box (6) is fixedly connected to the bottom of the main body shell (1) at the position corresponding to the arc-shaped sealing plate (5). The dust collection box (6) is used to collect solid particles in the dust. The bottom of the dust collection box (6) is a conical design. Multiple exhaust ports (7) are opened at the bottom of the dust collection box (6). A flap valve (8) is provided on the exhaust port (7) to control the flow channel opening and closing of the exhaust port (7). Partition (9), multiple partitions (9) are arranged at equal intervals and staggered inside the main body shell (1). The partitions (9) are rotatably connected to the main body shell (1). The partitions (9) are high temperature resistant alloy corrugated plates used to block dust particles in flue gas. The main body shell (1) is provided with linkage flip-plate mechanisms (10) on both sides, with the same number of partitions (9). The linkage flipping mechanism (10) includes multiple mounting brackets (101) fixedly connected to the side walls of the main body shell (1). A drive box (102) is fixedly connected to the mounting bracket (101). A worm gear (103) is rotatably connected inside the drive box (102). A linkage shaft (15) passes through multiple drive boxes (102) on the corresponding side and is connected to the worm gear (103) in a transmission connection. A main gear (104) and a secondary gear (105) are rotatably connected inside the drive box (102). The rotating shaft of the partition (9) is connected to the secondary gear (105) inside the drive boxes (102) on both sides in a transmission connection. The drive box (102) is also rotatably connected to a worm gear (106), which meshes with the worm (103). The worm gear (106) is connected to the main gear (104) through a one-way bearing, and the main gear (104) meshes with the auxiliary gear (105).

2. The anti-clogging self-cleaning heat exchanger for high-temperature flue gas waste heat recovery in a glass kiln according to claim 1, characterized in that: The dust collection box (6) has spring telescopic rods (11) rotatably connected to the inner walls on both sides. The output end of the spring telescopic rods (11) is rotatably connected to the bottom of the arc-shaped sealing plate (5) on the corresponding side.

3. The anti-clogging self-cleaning heat exchanger for high-temperature flue gas waste heat recovery in a glass kiln according to claim 2, characterized in that: The spring telescopic rod (11) includes a telescopic rod and a compression spring disposed in its main body. The two ends of the compression spring abut against the bottom of the main body and the output end of the telescopic rod, respectively.

4. The anti-clogging self-cleaning heat exchanger for high-temperature flue gas waste heat recovery in a glass kiln according to claim 1, characterized in that: The dust screening mechanism (4) includes an adjustment seat (41) located in the air inlet (2). Multiple wing-shaped guide plates (42) are rotatably connected at equal intervals on the side wall of the adjustment seat (41). A conical guide hood (43) is provided at one end of the adjustment seat (41), and a servo motor (44) is provided at the end of the adjustment seat (41) corresponding to the conical guide hood (43).

5. The anti-clogging self-cleaning heat exchanger for high-temperature flue gas waste heat recovery in a glass kiln according to claim 4, characterized in that: The bottom of the adjusting seat (41) is rotatably connected to a main bevel gear (45), and multiple secondary bevel gears (46) are rotatably connected at equal intervals on the inner wall of the adjusting seat (41). The main bevel gear (45) and the secondary bevel gears (46) mesh with each other. The output end of the servo motor (44) passes through the adjusting seat (41) and is connected to the main bevel gear (45) in a transmission connection. The rotating shaft of the wing-shaped guide plate (42) is connected to the secondary bevel gears (46) in a transmission connection.

6. The anti-clogging self-cleaning heat exchanger for high-temperature flue gas waste heat recovery in a glass kiln according to claim 5, characterized in that: The intake port (2) is also equipped with a commutator A (12). The transmission shaft of the main bevel gear (45) is connected to the commutator A (12). Both sides of the commutator A (12) are connected to connecting shafts (13). When the shaft of the main bevel gear (45) rotates, it drives the two connecting shafts (13) to rotate through the commutator A (12). Both sides of the intake port (2) are connected to commutators B (14) through brackets. The commutator B (14) is connected to the connecting shaft (13), and a linkage shaft (15) is also provided on the commutator B (14). The connecting shaft (13) drives the linkage shaft (15) to rotate through the commutator B (14).

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