Waste gas treatment device and method for lime shaft kiln calcination

Abstract

The invention relates to the technical field of waste gas treatment, in particular to a waste gas treatment device and method for lime shaft kiln calcination. The waste gas treatment device comprises a shell, a support is rotationally connected to an inner cavity of the shell, the peripheral wall of the support is fixedly sleeved with a dust removal cloth bag, and an inner side ring body is fixedly installed in the inner cavity of the shell; two symmetrical outer side ring bodies are slidably arranged on the outer circumferential wall of the inner side ring body, an air inlet shell is welded to the front end of the inner side ring body, a cooling water pipe is arranged in an inner cavity of the shell, an electric push rod is fixedly installed on the side wall of the shell, a piston plate is fixedly installed at the telescopic end of the electric push rod, and when the piston plate moves forwards, the piston plate is fixed to the outer side ring body. High-temperature airflow flows in a manner of being attached to the surface of the cooling water pipe, so that the probability that the high-temperature airflow damages the dust collection bag is reduced; wherein airflow is uniformly pushed to move by virtue of the piston plate, so that a relatively large temperature difference in the vertical direction when the airflow moves to a dust collection bag area is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, in particular to a waste gas treatment device and method for lime shaft kiln calcination. Background Art

[0002] The waste gas treatment unit for lime shaft kilns is a key device specifically designed to purify the high-temperature, dusty, and corrosive waste gas generated during lime production. Its core functions are to reduce waste gas temperature, remove dust, and purify harmful gases to ensure compliance with emission standards, while also maximizing waste heat recovery and improving energy efficiency. Lime shaft kiln waste gas typically has a temperature between 300-600°C and contains a large amount of dust, primarily CaO, with concentrations reaching several grams per cubic meter. It may also be accompanied by acidic and corrosive gases such as SO2 and NOx. To address these characteristics, the treatment unit utilizes a multi-stage process. The bag filter serves as the core dust removal equipment. It utilizes fiber filter bags to intercept dust, effectively removing extremely fine dust particles and ensuring that the exhaust dust concentration meets environmental standards. Publication No. CN110075626A discloses a bag dust collector. When in use, this dust collector is able to open the bag by setting a fixing plate and a support rod, allowing air to better pass through the bag and be sent out from the bag, preventing the two side walls of the bag from adhering together under the action of wind force, thereby affecting the filtration of air. However, during operation, the current lime shaft kiln calcination waste gas treatment device may cause local overheating if there is an oversupply of fuel or nodules in the kiln. This will cause the waste gas temperature to rise sharply to above the temperature resistance limit of the filter material in a short period of time, and then cause the filter bag fibers to quickly carbonize and melt, forming large-area holes. In view of this, the present invention aims to provide a waste gas treatment device and method for lime shaft kiln calcination. Summary of the Invention

[0003] The object of the present invention is to provide a device and method for treating waste gas for lime shaft kiln calcination, so as to solve the problems raised in the above background technology.

[0004] The technical solution of the present invention is: a waste gas treatment device and method for lime shaft kiln calcination, comprising a shell, a bracket rotatably connected to the inner cavity of the shell, a dust bag fixedly sleeved on the outer peripheral wall of the bracket, an inner ring body fixedly installed in the inner cavity of the shell, a plurality of partitions fixedly welded at equal intervals on the inner peripheral wall of the inner ring body, two symmetrical outer ring bodies are slidably arranged on the outer peripheral wall of the inner ring body, an air intake shell is welded to the front end of the inner ring body, a cooling water pipe is provided in the inner cavity of the shell, and the cooling water pipe is located at the air outlet end of the inner cavity of the air intake shell, and the outer wall of the shell is fixedly mounted on the inner ring body. An electric push rod is fixedly installed, a piston plate is fixedly installed at the telescopic end of the electric push rod, a number of one-way valves are fixedly installed at equal intervals on the side wall of the piston plate, a one-way plate is fixedly installed in the inner cavity of the air intake housing, a number of one-way valves are fixedly installed at equal intervals on the side wall of the one-way plate, and the high-temperature airflow flows along the surface of the cooling water pipe, thereby cooling the high-temperature airflow, thereby reducing the probability of the high-temperature airflow causing damage to the dust bag; wherein, the piston plate is used to evenly push the airflow to move, thereby avoiding a large temperature difference in the vertical direction when the airflow moves to the dust bag area.

[0005] Preferably, two symmetrical motors are fixedly installed on the top of the inner cavity of the shell, gears are fixedly installed on the bottom output ends of the two motors, and gear rings are fixedly installed on the outer peripheral walls of the two outer ring bodies, and the two gear rings are respectively engaged with corresponding gears. The motor drives the gear to rotate, and the gear drives the gear ring and the corresponding outer ring body to rotate, so that the end of the outer ring body abuts against the side wall of the air intake shell, thereby shielding the dust bag for dust removal.

[0006] Preferably, an air pump is fixedly mounted on the top of the housing, an output end of the air pump is rotatably connected to an air pipe, the bottom of the air pipe is connected to an air distribution plate, and an air distribution hole is opened between both ends of the air distribution plate.

[0007] Preferably, an air distribution frame is rotatably connected to the outer peripheral wall of the air distribution plate, and two symmetrical air outlet pipes 1 are connected to the front and rear ends of the air distribution frame, and two symmetrical air outlet pipes 2 are connected to the left and right ends of the air distribution frame, and the bottoms of the two air outlet pipes 2 are connected to the inner ring body. The set air pump intermittently delivers high-pressure gas to the inside of the air pipe, and then the high-pressure gas enters the inside of the dust collector bag through the air distribution plate, the air distribution frame and the air outlet pipe 1 in turn, and then vibrates the dust collector bag to remove dust.

[0008] Preferably, a driving gear is fixedly installed on the output end of one of the motors, and a driven gear is fixedly installed on the outer peripheral wall of the air pipe. A transmission chain is arranged between the driving gear and the driven gear. When the motor drives the gear to rotate, it will also drive the driving gear to rotate. The driving gear drives the driven gear to rotate through the transmission chain, and the driven gear drives the air pipe and the air distribution plate to rotate, so that the air distribution hole opened on the side wall of the air distribution plate is changed from being aligned with the air outlet pipe 1 to being aligned with the air outlet pipe 2.

[0009] Preferably, motor 2 is fixedly mounted on the top of the inner cavity of the shell, gear 2 is fixedly mounted on the bottom output end of motor 2, and a gear ring 2 meshing with gear 2 is fixedly sleeved on the outer peripheral wall of the bracket. Motor 2 drives gear 2 to rotate, and gear 2 drives gear ring 2, the bracket and the dust bag to rotate, so that the fabric on the outside of the dust bag can participate in the dust removal operation in turn, and the fabric that has not undergone dust removal operation can dissipate heat naturally to prepare for the next dust removal operation. This reduces the impact of high temperature on the dust bag to a certain extent.

[0010] Preferably, an air inlet duct and an air outlet duct are connected to the side wall of the shell.

[0011] The present invention provides an improved device and method for treating waste gas for lime shaft kiln calcination, which has the following improvements and advantages compared with the prior art:

[0012] 1. When the piston plate moves forward, the high-temperature airflow flows along the surface of the cooling water pipe, thereby reducing the probability of high-temperature airflow damaging the dust collector bags. The piston plate evenly pushes the airflow to move, avoiding large temperature differences in the vertical direction when the airflow moves to the dust collector bag area.

[0013] 2. The rear end of the inner cavity wall of the air intake housing is designed with a curved surface similar to the cooling water pipe. This extends the contact area and contact time between the high-temperature airflow and the cooling water pipe. At the same time, the second motor drives the dust collection bag to rotate, so that the outer fabric of the dust collection bag can participate in the dust collection operation in turn, and the fabric not in the dust collection operation can dissipate heat naturally.

[0014] 3. High-pressure gas enters the space between the inner and outer ring bodies through the second outlet pipe. At this time, the normal-temperature airflow delivered by the air pump moves from the outside to the inside of the dust bag, using this flowing normal-temperature airflow to cool down the fabric that has just been dusted and the fabric that is about to be dusted;

[0015] 4. When high-humidity exhaust gas passes through the cooling water pipe, the water molecules in the exhaust gas are affected by the low temperature and condense into liquid water and adhere to the surface of the cooling water pipe, thereby performing preliminary dehumidification of the exhaust gas, thereby reducing the amount of mud formed by water vapor and dust adhering to the surface of the dust bag;

[0016] 5. Since the outer surface of the dust bag in the expanded state is in close contact with the partition, the mud adhered to the surface of the rotating dust bag is scraped off by the partition when it passes through the partition; in addition, since the inner side of the dust bag is under positive pressure, the external exhaust gas cannot enter the dust bag during this period. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further explained below in conjunction with the accompanying drawings and examples:

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the inner cavity structure of the shell of the present invention;

[0020] Figure 3 This is a schematic structural diagram of the outer ring body of the present invention in its initial state;

[0021] Figure 4 This is a schematic diagram of the structure of the outer ring body after rotation of the present invention;

[0022] Figure 5 This invention Figure 4 A schematic diagram of the enlarged structure of part A;

[0023] Figure 6 It is a schematic diagram of the inner ring body and the partition structure of the present invention;

[0024] Figure 7 This invention Figure 6 A magnified schematic diagram of the structure of part B;

[0025] Figure 8 This is a schematic structural diagram of the second gear ring of the present invention;

[0026] Figure 9 It is a schematic diagram of the structure of the dust bag of the present invention;

[0027] Figure 10 It is a schematic diagram of the support structure of the present invention;

[0028] Figure 11 Schematic diagram of the inner ring structure of the present invention;

[0029] Figure 12 It is a schematic diagram of the inner cavity structure of the air intake housing of the present invention;

[0030] Figure 13 It is a schematic structural diagram of the piston plate and the one-way plate of the present invention.

[0031] Description of reference numerals:

[0032] 1. Outer casing; 2. Bracket; 3. Dust bag; 4. Inner ring; 5. Partition; 6. Outer ring; 7. Inlet casing; 8. Cooling water pipe; 9. Electric push rod; 10. Piston plate; 11. One-way valve 1; 12. One-way plate; 13. One-way valve 2; 14. Motor 1; 15. Gear 1; 16. Ring gear 1; 17. Air pump; 18. Air pipe; 19. Air distributor; 20. Air distributor hole; 21. Air distributor frame; 22. Outlet pipe 1; 23. Outlet pipe 2; 24. Driving gear; 25. Driven gear; 26. Transmission chain; 27. Motor 2; 28. Gear 2; 29. Ring gear 2; 30. Inlet pipe; 31. Outlet pipe. DETAILED DESCRIPTION

[0033] The present invention is described in detail below, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] The present invention provides an improved device and method for treating waste gas used in lime shaft kiln calcination. The technical solution of the present invention is:

[0035] like Figures 1-13 As shown, a waste gas treatment device and method for lime shaft kiln calcination includes a shell 1, an air inlet pipe 30 and an air outlet pipe 31 are connected on the side wall of the shell 1, a bracket 2 is rotatably connected to the inner cavity of the shell 1, a dust bag 3 is fixedly sleeved on the outer peripheral wall of the bracket 2, an air pump 17 is fixedly installed on the top of the shell 1, the output end of the air pump 17 is rotatably connected to the air delivery pipe 18, the bottom of the air delivery pipe 18 is connected to the air distribution plate 19, an air distribution hole 20 is opened between the two ends of the air distribution plate 19, an air distribution frame 21 is rotatably connected on the outer peripheral wall of the air distribution plate 19, and the front and rear ends of the air distribution frame 21 are connected to two symmetrical air outlet pipes 22. There are two symmetrical air outlet pipes 23 connected at the left and right ends, and the bottoms of the two air outlet pipes 23 are connected to the inner ring body 4. When in use, the exhaust gas enters the inner cavity of the outer shell 1 through the air inlet pipe 30, as shown in the figure, and then the exhaust gas passes through the dust bag 3 for dust removal and enters the inner side of the dust bag 3, and then the exhaust gas moves upward and is finally discharged through the air outlet pipe 31; wherein, the air pump 17 is provided to intermittently deliver high-pressure gas to the inside of the air supply pipe 18, and then the high-pressure gas passes through the gas distribution plate 19, the gas distribution frame 21 and the air outlet pipe 1 22 in turn into the inner side of the dust bag 3, thereby vibrating the dust bag 3 for dust removal.

[0036] Furthermore, the inner cavity of the shell 1 is fixedly installed with an inner ring body 4, and a number of partitions 5 are fixedly welded at equal intervals on the inner circumferential wall of the inner ring body 4. Two symmetrical outer ring bodies 6 are slidingly arranged on the outer circumferential wall of the inner ring body 4. Two symmetrical motors 14 are fixedly installed on the top of the inner cavity of the shell 1. Gears 15 are fixedly installed on the output ends of the bottoms of the two motors 14. Gear rings 16 are fixedly installed on the outer circumferential walls of the two outer ring bodies 6, and the two gear rings 16 are respectively engaged with the corresponding gears 15. An air intake shell 7 is welded on the front end of the inner ring body 4, and a cooling air chamber is provided in the inner cavity of the shell 1. The cooling water pipe 8 is located at the air outlet end of the inner cavity of the air inlet shell 7. When the lime shaft kiln has excessive fuel or nodules in the kiln, the exhaust gas temperature rises abnormally. After the external temperature sensor detects the temperature abnormality, the motor 14 is operated, and the external pipeline inputs cooling water flow into the cooling water pipe 8. The motor 14 drives the gear 15 to rotate, and the gear 15 drives the ring gear 16 and the corresponding outer ring body 6 to rotate, so that the end of the outer ring body 6 abuts against the side wall of the air inlet shell 7, thereby shielding the dust bag 3 performing the dust removal operation.

[0037] Furthermore, an electric push rod 9 is fixedly installed on the side wall of the shell 1, and a piston plate 10 is fixedly installed on the telescopic end of the electric push rod 9. Several one-way valves 11 are fixedly installed on the side wall of the piston plate 10 at equal intervals. A one-way plate 12 is fixedly installed in the inner cavity of the air intake shell 7, and several one-way valves 13 are fixedly installed on the side wall of the one-way plate 12 at equal intervals. The electric push rod 9 intermittently drives the piston plate 10 to reciprocate. When the piston plate 10 moves backward, the external high-temperature gas enters the space between the piston plate 10 and the one-way plate 12 through the one-way valve 11; when the piston plate 10 moves forward, the high-temperature gas moves toward the cooling water pipe 8 through the one-way valve 2 13 under the push of the piston plate 10, so that the high-temperature airflow flows along the surface of the cooling water pipe 8, thereby cooling the high-temperature airflow, thereby reducing the probability of the high-temperature airflow causing damage to the dust bag 3; wherein, the piston plate 10 is used to evenly push the airflow to move, thereby avoiding a large temperature difference in the vertical direction when the airflow moves to the dust bag 3 area.

[0038] Furthermore, a second motor 27 is fixedly mounted on the top of the inner cavity of the shell 1, a second gear 28 is fixedly mounted on the bottom output end of the second motor 27, and a second gear ring 29 meshing with the second gear 28 is fixedly sleeved on the outer peripheral wall of the bracket 2. The second motor 27 drives the second gear 28 to rotate, and the second gear 28 drives the second gear ring 29, the bracket 2 and the dust bag 3 to rotate, so that the outer fabric of the dust bag 3 can participate in the dust removal operation in turn, and the fabric that has not undergone the dust removal operation can dissipate heat naturally to prepare for the next dust removal operation. This reduces the impact of high temperature on the dust bag 3 to a certain extent.

[0039] Furthermore, a driving gear 24 is fixedly installed at the output end of one of the motors 14, and a driven gear 25 is fixedly installed on the outer peripheral wall of the air supply pipe 18. A transmission chain 26 is arranged between the driving gear 24 and the driven gear 25. When the motor 14 drives the gear 15 to rotate, it will also drive the driving gear 24 to rotate. The driving gear 24 drives the driven gear 25 to rotate through the transmission chain 26. The driven gear 25 drives the air supply pipe 18 and the air distribution plate 19 to rotate, so that the air distribution hole 20 opened on the side wall of the air distribution plate 19 is changed from being aligned with the air outlet pipe 1 22 to being aligned with the air outlet pipe 2 23.

[0040] Working principle: When in use, the exhaust gas enters the inner cavity of the shell 1 through the air inlet pipe 30, as shown in the figure, and then the exhaust gas passes through the dust bag 3 for dust removal and enters the inner side of the dust bag 3, and then the exhaust gas moves upward and is finally discharged through the air outlet pipe 31; wherein, the air pump 17 is provided to intermittently deliver high-pressure gas to the inside of the air pipe 18, and then the high-pressure gas passes through the gas distribution plate 19, the gas distribution frame 21 and the air outlet pipe 22 in turn and enters the inner side of the dust bag 3, thereby vibrating the dust bag 3 to remove dust;

[0041] When there is excessive fuel or nodules in the lime shaft kiln, the exhaust gas temperature rises abnormally. After the external temperature sensor detects the temperature abnormality, the motor 14 is operated, and the external pipeline inputs cooling water flow into the cooling water pipe 8. The motor 14 drives the gear 15 to rotate, and the gear 15 drives the gear ring 16 and the corresponding outer ring body 6 to rotate, so that the end of the outer ring body 6 abuts against the side wall of the air intake shell 7, thereby shielding the dust bag 3 of the dust removal operation; wherein, the partition 5 is set to prevent the subsequent air flow from flowing to the left and right sides; the electric push rod 9 is then set to intermittently drive the piston plate 10 to reciprocate. When the piston plate 10 moves backward, the external high temperature The gas enters the space between the piston plate 10 and the one-way plate 12 through the one-way valve 11; when the piston plate 10 moves forward, the high-temperature gas is pushed by the piston plate 10 and moves toward the cooling water pipe 8 through the one-way valve 2 13, so that the high-temperature airflow flows along the surface of the cooling water pipe 8, thereby cooling the high-temperature airflow, thereby reducing the probability of the high-temperature airflow causing damage to the dust bag 3; wherein, the piston plate 10 is used to evenly push the airflow to move, avoiding a large temperature difference in the vertical direction when the airflow moves to the dust bag 3 area; in addition, the rear end of the inner cavity wall of the air intake shell 7 is set to a curved surface similar to the cooling water pipe 8, so that the high-temperature airflow can flow along the curved inner cavity wall of the air intake shell 7 To the rear end of the cooling water pipe 8, thereby extending the contact area and contact time between the high-temperature airflow and the cooling water pipe 8, thereby improving the cooling effect of the cooling water pipe 8 on the high-temperature airflow; at the same time, the set motor 27 drives the gear 2 28 to rotate, and the set gear 28 drives the ring gear 2 29, the bracket 2 and the dust bag 3 to rotate, so that the outer fabric of the dust bag 3 can participate in the dust removal operation in turn, and the fabric that has not undergone the dust removal operation can naturally dissipate heat to prepare for the next dust removal operation. This reduces the impact of high temperature on the dust bag 3 to a certain extent; in this process, the motor 14 drives the gear 15 to rotate and at the same time drives the driving gear 24 to rotate, and the driving gear 24 is rotated by The transmission chain 26 drives the driven gear 25 to rotate, and the driven gear 25 drives the air pipe 18 and the air distribution plate 19 to rotate, so that the air distribution hole 20 opened on the side wall of the air distribution plate 19 is changed from being aligned with the air outlet pipe 1 22 to being aligned with the air outlet pipe 2 23; then the air pump 17 continues to operate, and the high-pressure gas enters the space formed between the inner ring body 4 and the outer ring body 6 through the air pipe 18, the air distribution plate 19, the air distribution frame 21 and the air outlet pipe 2 23. At this time, the normal temperature air flow delivered by the air pump 17 moves from the outside to the inside of the dust bag 3. With the help of this flowing normal temperature air flow, the cloth that has just been dusted and the cloth that is about to be dusted are cooled, so as to avoid overheating and damage to the cloth of the dust bag 3;

[0042] When the cooling water pipe 8 in the kiln breaks or the desulfurization tower sprays excessive liquid, the external humidity sensor detects abnormal humidity, and the outer ring body 6 is set to cover the dust bag 3 again, and then the external pipe introduces low-temperature water flow into the cooling water pipe 8, and then the electric push rod 9 drives the piston plate 10 to move back and forth again. When the high-humidity exhaust gas passes through the cooling water pipe 8, the water molecules of the exhaust gas are affected by the low temperature and condense into liquid water and adhere to the surface of the cooling water pipe 8, so as to perform preliminary dehumidification of the exhaust gas, thereby reducing the amount of mud formed by water vapor and dust adhering to the surface of the dust bag 3; then the outer ring body 6 is reset, and the set air pump 17 continuously transports high-humidity exhaust gas to the inside of the dust bag 3 through the air inlet pipe. After the dust bag 3 is in the air, it is put into the air filter 3. When the dust bag 3 is in the air, it is put into the air filter 3. When the dust bag 3 is in the air filter 3, it is put into the air filter 3. The air filter 3 is cleaned by the air filter 3 and the filter 3 is then blown out of the air filter 3. When the dust bag 3 is in the air filter 3, it is blown out of the air filter 3.

[0043] The above description is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device and method for treating waste gas for lime shaft kiln calcination, comprising a housing (1), characterized in that: The inner cavity of the shell (1) is rotatably connected to a bracket (2), a dust bag (3) is fixedly sleeved on the outer peripheral wall of the bracket (2), an inner ring body (4) is fixedly installed in the inner cavity of the shell (1), a plurality of partitions (5) are fixedly welded at equal intervals on the inner peripheral wall of the inner ring body (4), two symmetrical outer ring bodies (6) are slidably arranged on the outer peripheral wall of the inner ring body (4), an air intake shell (7) is welded at the front end of the inner ring body (4), and a cooling water The cooling water pipe (8) is located at the air outlet end of the inner cavity of the air inlet housing (7); an electric push rod (9) is fixedly mounted on the side wall of the outer shell (1); a piston plate (10) is fixedly mounted on the telescopic end of the electric push rod (9); a plurality of one-way valves (11) are fixedly mounted at equal intervals on the side wall of the piston plate (10); a one-way plate (12) is fixedly mounted in the inner cavity of the air inlet housing (7); a plurality of one-way valves (13) are fixedly mounted at equal intervals on the side wall of the one-way plate (12).

2. The device and method for treating waste gas from a lime shaft kiln according to claim 1, wherein: Two symmetrical motors (14) are fixedly mounted on the top of the inner cavity of the shell (1), and gears (15) are fixedly mounted on the bottom output ends of the two motors (14). A gear ring (16) is fixedly mounted on the outer peripheral walls of the two outer ring bodies (6), and the two gear rings (16) are respectively engaged with the corresponding gears (15).

3. The device and method for treating waste gas from a lime shaft kiln according to claim 2, wherein: An air pump (17) is fixedly mounted on the top of the housing (1); an output end of the air pump (17) is rotatably connected to an air delivery pipe (18); the bottom of the air delivery pipe (18) is connected to an air distribution plate (19); and an air distribution hole (20) is provided between the two ends of the air distribution plate (19).

4. The device and method for treating waste gas from a lime shaft kiln according to claim 3, wherein: An air distribution frame (21) is rotatably connected to the outer peripheral wall of the air distribution plate (19), and two symmetrical air outlet pipes (22) are connected at the front and rear ends of the air distribution frame (21), and two symmetrical air outlet pipes (23) are connected at the left and right ends of the air distribution frame (21), and the bottoms of the two air outlet pipes (23) are both connected to the inner ring body (4).

5. The device and method for treating waste gas from a lime shaft kiln according to claim 3, wherein: A driving gear (24) is fixedly mounted on the output end of one of the motors (14), a driven gear (25) is fixedly mounted on the outer peripheral wall of the gas delivery pipe (18), and a transmission chain (26) is wound between the driving gear (24) and the driven gear (25).

6. The device and method for treating waste gas from a lime shaft kiln according to claim 1, wherein: A second motor (27) is fixedly mounted on the top of the inner cavity of the housing (1), a second gear (28) is fixedly mounted on the output end of the bottom of the second motor (27), and a second gear ring (29) meshing with the second gear (28) is fixedly sleeved on the outer peripheral wall of the bracket (2).

7. The device and method for treating waste gas from a lime shaft kiln according to claim 1, wherein: An air inlet pipe (30) and an air outlet pipe (31) are connected on the side wall of the shell (1).

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