Dust removal, desulfurization and denitrification equipment for boiler flue gas

Abstract

The utility model relates to the technical field of environmental protection, in particular to boiler flue gas dust removal, desulfurization and denitrification equipment which can cool flue gas in advance and recycle heat in the flue gas when the flue gas is desulfurized and denitrified, so that the corrosion of the high-temperature flue gas to a desulfurization tower and a denitrification tower is reduced, and the service life of the desulfurization tower and the denitrification tower is prolonged. The service life of the desulfurization tower and the denitration tower is ensured, meanwhile, the waste of heat in the flue gas is reduced, and the environmental protection property and the reliability are high; comprising a bottom plate, a desulfurization tower, an exhaust pipe, a denitration tower and a discharge pipe, the desulfurization tower and the denitration tower are both installed on the bottom plate and are communicated through the exhaust pipe, and the discharge pipe is arranged on the denitration tower; the device further comprises an induced draft fan, a gas conveying pipe, a gas pipe A, an input pipe and a heat recovery mechanism, and the induced draft fan is fixedly installed on the bottom plate.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection, in particular to boiler flue gas dust removal, desulfurization and denitrification equipment. Background Art

[0002] The flue gas desulfurization and denitrification device is a device for removing sulfides and nitrides from flue gas, which has a wide range of applications in the field of environmental protection. Especially for thermal power plants, it provides water heating by burning coal in the boiler, and then generates water vapor to drive the gas turbine to work. A large amount of flue gas will be generated during the combustion of coal. In the prior art, the utility model patent with patent application number 202022405487.5 discloses a deep dust removal, desulfurization and denitrification tower, which is mainly composed of a tower body and a spraying device. When it is used, the flue gas is passed into the tower body, and then the absorbing liquid is sprayed by the spraying device to absorb the sulfides and nitrides in the flue gas; the inventor believes that there are the following problems in its use. Due to the high temperature of the flue gas generated in the boiler, when it is directly discharged into the tower body for treatment, the high-temperature flue gas is easy to promote the corrosion of the tower body, resulting in a reduction in the service life of the tower body, and the heat energy in the flue gas is wasted in vain, which is inconvenient to use and has poor reliability. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a boiler flue gas dust removal, desulfurization and denitrification equipment which can cool the flue gas in advance when desulfurizing and denitrifying the flue gas, and recycle and utilize the heat in the flue gas, thereby reducing the corrosion of the desulfurization tower and the denitrification tower by the high-temperature flue gas, ensuring the service life of the desulfurization tower and the denitrification tower, and reducing the waste of heat in the flue gas, and having high environmental protection and reliability.

[0004] The utility model of boiler flue gas dust removal, desulfurization and denitrification equipment comprises a base plate, a desulfurization tower, an exhaust pipe, a denitrification tower and an exhaust pipe, the desulfurization tower and the denitrification tower are both mounted on the base plate, the desulfurization tower and the denitrification tower are connected through the exhaust pipe, and the denitrification tower is provided with an exhaust pipe; it also comprises an induced draft fan, an air supply pipe, an air pipe A, an input pipe and a heat recovery mechanism, the induced draft fan is fixedly mounted on the base plate, an air supply pipe is arranged at the output end of the induced draft fan, a valve is arranged on the air supply pipe, the output end of the air supply pipe is connected with the heat recovery mechanism, the heat recovery mechanism is mounted on the base plate, the heat recovery mechanism has the function of collecting heat, the output end of the heat recovery mechanism is connected with the input pipe through the air pipe A, the output end of the input pipe is connected with the desulfurization tower, a filter is arranged on the input pipe, and a valve is arranged on the air pipe A; when treating the boiler flue gas ... The input end of the machine is connected to the smoke outlet of the boiler, and then the induced draft fan is turned on to allow the flue gas to enter the heat recovery mechanism through the induced draft fan and the gas pipe. Then the heat recovery mechanism absorbs and utilizes the heat in the flue gas to cool the flue gas. The cooled flue gas enters the desulfurization tower through the air pipe A and the input pipe for desulfurization. Then the flue gas enters the denitrification tower through the desulfurization tower and the exhaust pipe for denitrification. Then the flue gas is discharged to the outside through the exhaust pipe. When the flue gas passes through the input pipe, the filter in the input pipe filters out the dust in the flue gas. When the flue gas is desulfurized and denitrated, it can cool the flue gas in advance and recycle the heat in the flue gas, thereby reducing the corrosion of the desulfurization tower and the denitrification tower by the high-temperature flue gas, ensuring the service life of the desulfurization tower and the denitrification tower, and reducing the waste of heat in the flue gas. It has high environmental protection and reliability.

[0005] Preferably, the heat recovery mechanism includes a heat exchange mechanism, a bracket, a heat exchange cylinder and a water outlet pipe. The heat exchange cylinder is fixedly mounted on the bottom plate by the bracket. A chamber is arranged in the heat exchange cylinder. A water outlet pipe communicating with the chamber is arranged at the lower part of the heat exchange cylinder. A valve is arranged on the water outlet pipe. Water is arranged in the chamber of the heat exchange cylinder. The heat exchange mechanism is mounted on the heat exchange cylinder. The middle part of the heat exchange mechanism is located in the chamber of the heat exchange cylinder. The input end of the heat exchange mechanism is connected with the gas pipe, and the output end of the heat exchange mechanism is connected with the air pipe A. The heat exchange mechanism has a heat exchange function. When the flue gas is treated, the high-temperature flue gas enters the heat exchange mechanism through the induced draft fan and the gas pipe. Then, the high-temperature flue gas exchanges heat with the water in the chamber of the heat exchange cylinder through the heat exchange mechanism to heat up the water. Then, the cooled flue gas enters the desulfurization tower through the air pipe A and the input pipe for treatment. The staff can take out the hot water in the heat exchange cylinder through the water outlet pipe for use, which not only promotes the cooling of the flue gas, but also recovers and utilizes the heat in the flue gas, and is highly environmentally friendly.

[0006] Preferably, the heat exchange mechanism includes a driving mechanism, a rotary joint A, a connecting pipe A, a transverse pipe A, multiple groups of heat exchange pipes, a transverse pipe B, a connecting pipe B, a rotary joint B, a pipeline, a delivery pipe and a stop valve. The rotary joint A is fixedly installed at the lower part of the heat exchange cylinder, the connecting pipe A is rotatably installed on the rotary joint A and the heat exchange cylinder, the connecting pipe A is communicated with the rotary joint A, the transverse pipe A is communicated with the connecting pipe A, the lower ends of the multiple groups of heat exchange pipes are all communicated with the transverse pipe A, the upper ends of the multiple groups of heat exchange pipes are all communicated with the transverse pipe B, the lower end of the connecting pipe B is communicated with the transverse pipe B, the connecting pipe B is rotatably installed on the heat exchange cylinder and the rotary joint B, the rotary joint B is fixedly installed on the upper end of the heat exchange cylinder, the lower end of the pipeline is communicated with the rotary joint B, the driving mechanism is installed on the connecting pipe B and the heat exchange cylinder, the driving mechanism is used to drive the connecting pipe B to rotate, and the input end of the air pipe A is communicated with the pipeline. The upper end of the delivery pipe is connected to the rotary joint A, and a stop valve is provided on the delivery pipe. The lower end of the delivery pipe is open, and the output end of the gas delivery pipe is connected to the delivery pipe. Multiple groups of heat exchange pipes are located in the chamber of the heat exchange cylinder, and the connecting pipe A is coaxial with the connecting pipe B. When cooling the flue gas, close the stop valve to allow the flue gas to enter the transverse pipe A and multiple groups of heat exchange pipes through the gas delivery pipe, the delivery pipe, the rotary joint A and the connecting pipe A in turn. Then, the flue gas exchanges heat with the water in the chamber of the heat exchange cylinder through the tube walls of the multiple groups of heat exchange pipes in the multiple groups of heat exchange pipes, so that the flue gas is cooled and the water is heated. Then, the flue gas enters the input pipe and the desulfurization tower through the transverse pipe B, the connecting pipe B, the rotary joint B, the pipeline and the gas pipe A in turn for desulfurization treatment. The flue gas exchanges heat with the water in the chamber of the heat exchange cylinder through the tube walls of the multiple groups of heat exchange pipes, which promotes the cooling of the flue gas.

[0007] Preferably, the driving mechanism includes a bevel gear A, a bevel gear B, a driving shaft and a driving motor. The bevel gear A is fixedly sleeved on the connecting pipe B, the bevel gear A is meshed with the bevel gear B, the bevel gear B is fixedly mounted on the driving shaft, the driving shaft is rotatably mounted on the heat exchange tube, the input end of the driving shaft is connected to the driving motor, and the driving motor is fixedly mounted on the heat exchange tube; when the flue gas passes into the multiple groups of heat exchange tubes, the driving motor is turned on, the driving motor drives the bevel gear A to rotate through the driving shaft, the bevel gear A drives the cross tube B to drive the multiple groups of heat exchange tubes to rotate through the connecting pipe B, the multiple groups of heat exchange tubes are evenly contacted with the water in the heat exchange tube chamber during the rotation process, so that the water in the heat exchange tube chamber is evenly heated, which promotes the cooling of the flue gas in the heat exchange tube, and the method is easy to use and highly practical.

[0008] Preferably, it also includes a water pump, a water pipe, a drain pipe A and a drain pipe B. The water pump is fixedly installed on the heat exchange cylinder, the output end of the water pump is connected to the water pipe, the input ends of the drain pipe A and the drain pipe B are both connected to the water pipe, valves are provided on the drain pipe A and the drain pipe B, the output end of the drain pipe B is communicated with the upper part of the heat exchange cylinder chamber, and the output end of the drain pipe A is connected to the pipeline; the input end of the water pump is connected to an external water source, when the water in the heat exchange cylinder chamber needs to be replaced, first open the valve on the water outlet pipe to discharge the hot water in the heat exchange cylinder chamber, then close the valve on the drain pipe A, open the valve on the drain pipe B, and let the external clean water flow through the drain pipe B in sequence. A water pump, a water pipe and a drain pipe B are added to the chamber of the heat exchange tube; when it is necessary to flush multiple groups of heat exchange tubes, close the valves on the air pipe A, the drain pipe B and the air pipe, open the stop valve, and open the valve on the drain pipe A at the same time, so that water enters the rotary joint B through the water pipe, the drain pipe A and the pipeline in turn, and then the water enters the multiple groups of heat exchange tubes through the connecting pipe B, the bevel gear A and the cross pipe B to flush the inner walls of the multiple groups of heat exchange tubes, flush the impurities on the inner walls of the multiple groups of heat exchange tubes, and then the impurities are discharged to the outside through the cross pipe A, the connecting pipe A, the rotary joint A and the delivery pipe; this facilitates the flushing of multiple groups of heat exchange tubes and improves convenience.

[0009] Preferably, a thermometer is provided on the heat exchange cylinder; the above arrangement facilitates the monitoring of the water temperature in the heat exchange cylinder chamber.

[0010] Preferably, the material of the multiple groups of heat exchange tubes is a heat-resistant material; through the above arrangement, the high temperature resistance effect of the multiple groups of heat exchange tubes is improved, and the service life of the multiple groups of heat exchange tubes is increased.

[0011] Compared with the prior art, the utility model has the following beneficial effects: when desulfurizing and denitrifying the flue gas, the flue gas can be cooled in advance, and the heat in the flue gas can be recycled and utilized, thereby reducing the corrosion of the desulfurization tower and the denitrification tower by the high-temperature flue gas, ensuring the service life of the desulfurization tower and the denitrification tower, and reducing the waste of heat in the flue gas, with high environmental protection and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0013] Figure 2 It is a first axonometric structural schematic diagram of the utility model;

[0014] Figure 3 It is a second axonometric structural schematic diagram of the utility model;

[0015] Figure 4 It is a schematic diagram of the structure of heat exchange tubes, induced draft fans and drive motors;

[0016] Figure 5It is a schematic diagram of the structure of bevel gear A, bevel gear B and rotary joint A, etc.;

[0017] Figure 6 It is a schematic diagram of the structure of drain pipe A, drain pipe B and water pump, etc.

[0018] Markings in the attached drawing: 1. bottom plate; 2. desulfurization tower; 3. exhaust pipe; 4. denitrification tower; 5. discharge pipe; 6. induced draft fan; 7. gas pipe; 8. gas pipe A; 9. input pipe; 10. bracket; 11. heat exchange cylinder; 12. water outlet pipe; 13. rotary joint A; 14. connecting pipe A; 15. transverse pipe A; 16. heat exchange pipe; 17. transverse pipe B; 18. connecting pipe B; 19. rotary joint B; 20. pipeline; 21. delivery pipe; 22. stop valve; 23. bevel gear A; 24. bevel gear B; 25. drive shaft; 26. drive motor; 27. water pump; 28. water pipe; 29. ​​drain pipe A; 30. drain pipe B. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0020] Example 1

[0021] like Figures 1 to 6The utility model of boiler flue gas dust removal, desulfurization and denitrification equipment includes a bottom plate 1, a desulfurization tower 2, an exhaust pipe 3, a denitrification tower 4, an exhaust pipe 5, an induced draft fan 6, an air pipe 7, an air pipe A8, an input pipe 9 and a heat recovery mechanism. The desulfurization tower 2 and the denitrification tower 4 are both installed on the bottom plate 1, and the desulfurization tower 2 and the denitrification tower 4 are connected through the exhaust pipe 3. The denitrification tower 4 is provided with an exhaust pipe 5, and the induced draft fan 6 is fixedly installed on the bottom plate 1. The output end of the induced draft fan 6 is provided with an air pipe 7, and a valve is provided on the air pipe 7. The output end of the air pipe 7 is connected to the heat recovery mechanism, which is installed on the bottom plate 1. The heat recovery mechanism has the function of collecting heat. The output end of the heat recovery mechanism is connected to the input pipe 9 through the air pipe A8, and the output end of the input pipe 9 is connected to the desulfurization tower 2. A filter is provided on the input pipe 9, and a valve is provided on the air pipe A8; when treating the boiler flue gas When the exhaust port of the boiler is turned on, the input end of the induced draft fan 6 is connected to the exhaust port of the boiler, and then the induced draft fan 6 is turned on to allow the flue gas to enter the heat recovery mechanism through the induced draft fan 6 and the gas pipe 7. Then the heat recovery mechanism absorbs and utilizes the heat in the flue gas to cool the flue gas. The cooled flue gas enters the desulfurization tower 2 through the air pipe A8 and the input pipe 9 for desulfurization. Then the flue gas enters the denitrification tower 4 through the desulfurization tower 2 and the exhaust pipe 3 for denitrification. Then the flue gas is discharged to the outside through the exhaust pipe 5. When the flue gas passes through the input pipe 9, the filter in the input pipe 9 filters out the dust in the flue gas. When the flue gas is desulfurized and denitrated, it can cool the flue gas in advance and recycle the heat in the flue gas, thereby reducing the corrosion of the desulfurization tower 2 and the denitrification tower 4 by the high-temperature flue gas, ensuring the service life of the desulfurization tower 2 and the denitrification tower 4, and reducing the waste of heat in the flue gas. It is environmentally friendly and has high reliability.

[0022] like Figure 2 , Figure 3 and Figure 4 The heat recovery mechanism includes a heat exchange mechanism, a bracket 10, a heat exchange tube 11 and a water outlet pipe 12. The heat exchange tube 11 is fixedly mounted on the bottom plate 1 through the bracket 10. A chamber is arranged in the heat exchange tube 11. A water outlet pipe 12 communicating with the chamber is arranged at the lower part of the heat exchange tube 11. A valve is arranged on the water outlet pipe 12. Water is arranged in the chamber of the heat exchange tube 11. The heat exchange mechanism is mounted on the heat exchange tube 11. The middle part of the heat exchange mechanism is located in the chamber of the heat exchange tube 11. The input end of the heat exchange mechanism is connected to the gas transmission pipe 7. The output end of the heat exchange mechanism is connected to the gas pipe A8. The heat exchange mechanism has a heat exchange function; when the flue gas is treated, the high-temperature flue gas enters the heat exchange mechanism through the induced draft fan 6 and the gas pipe 7, and then the high-temperature flue gas exchanges heat with the water in the chamber of the heat exchange tube 11 through the heat exchange mechanism to heat the water, and then the cooled flue gas enters the desulfurization tower 2 through the air pipe A8 and the input pipe 9 for treatment; the staff can take out the hot water in the heat exchange tube 11 through the water outlet pipe 12 for use, which not only promotes the cooling of the flue gas, but also recovers and utilizes the heat in the flue gas, and is highly environmentally friendly.

[0023] like Figure 4 and Figure 5 The driving mechanism includes a bevel gear A23, a bevel gear B24, a driving shaft 25 and a driving motor 26. The bevel gear A23 is fixedly sleeved on the connecting pipe B18. The bevel gear A23 meshes with the bevel gear B24. The bevel gear B24 is fixedly installed on the driving shaft 25. The driving shaft 25 is rotatably installed on the heat exchange tube 11. The input end of the driving shaft 25 is connected to the driving motor 26. The driving motor 26 is fixedly installed on the heat exchange tube 11. When the flue gas enters the multiple groups of heat exchange tubes 16, the driving motor 26 is turned on. The driving motor 26 drives the bevel gear A23 to rotate through the driving shaft 25. The bevel gear A23 drives the multiple groups of heat exchange tubes 16 to rotate through the cross tube B17 through the connecting pipe B18. During the rotation process, the multiple groups of heat exchange tubes 16 are evenly contacted with the water in the chamber of the heat exchange tube 11, so that the water in the chamber of the heat exchange tube 11 is evenly heated, which promotes the cooling of the flue gas in the heat exchange tube 16. It is easy to use and has high practicality.

[0024] like Figure 1 and Figure 6 The water pump 27 is fixedly installed on the heat exchange tube 11, the output end of the water pump 27 is connected to the water pipe 28, the input ends of the drain pipe A29 and the drain pipe B30 are both connected to the water pipe 28, valves are provided on the drain pipe A29 and the drain pipe B30, the output end of the drain pipe B30 is communicated with the upper part of the chamber of the heat exchange tube 11, and the output end of the drain pipe A29 is connected to the pipeline 20; the input end of the water pump 27 is connected to the external water source, when the water in the chamber of the heat exchange tube 11 needs to be replaced, first open the valve on the water outlet pipe 12 to discharge the hot water in the chamber of the heat exchange tube 11, then close the valve on the drain pipe A29, open the valve on the drain pipe B30, so that the external clean water passes through the water pump 27, the water pipe 28 and the drain pipe B30 in sequence 0 is added into the chamber of the heat exchange cylinder 11; when it is necessary to flush the multiple groups of heat exchange tubes 16, close the valves on the air pipe A8, the drain pipe B30 and the air supply pipe 7, open the stop valve 22, and open the valve on the drain pipe A29 at the same time, so that water enters the rotary joint B19 through the water supply pipe 28, the drain pipe A29 and the pipeline 20 in sequence, and then the water enters the multiple groups of heat exchange tubes 16 through the connecting pipe B18, the bevel gear A23 and the cross pipe B17, and flushes the inner walls of the multiple groups of heat exchange tubes 16 to flush the impurities on the inner walls of the multiple groups of heat exchange tubes 16, and then the impurities are discharged to the outside through the cross pipe A15, the connecting pipe A14, the rotary joint A13 and the delivery pipe 21; it is convenient to flush the multiple groups of heat exchange tubes 16 and improve the convenience.

[0025] The water pump 27 in this case is a high-pressure water pump.

[0026] Example 2

[0027] On the basis of Example 1, the material of the multiple groups of heat exchange tubes 16 is heat-resistant material, and a thermometer is provided on the heat exchange tube 11; through the above arrangement, it is convenient to monitor the water temperature in the chamber of the heat exchange tube 11.

[0028] The desulfurization tower 2, denitrification tower 4, induced draft fan 6, heat exchange cylinder 11, rotary joint A13, heat exchange tube 16, rotary joint B19, stop valve 22 and water pump 27 of the boiler flue gas dust removal, desulfurization and denitrification equipment of the utility model are all purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for creative labor by technicians in this field.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A boiler flue gas dust removal, desulfurization and denitrification equipment, comprising a base plate (1), a desulfurization tower (2), an exhaust pipe (3), a denitrification tower (4) and an exhaust pipe (5), wherein the desulfurization tower (2) and the denitrification tower (4) are both mounted on the base plate (1), the desulfurization tower (2) and the denitrification tower (4) are connected via the exhaust pipe (3), and the denitrification tower (4) is provided with an exhaust pipe (5); characterized in that: The invention also comprises an induced draft fan (6), an air delivery pipe (7), an air pipe A (8), an input pipe (9) and a heat recovery mechanism. The induced draft fan (6) is fixedly mounted on the base plate (1). The output end of the induced draft fan (6) is provided with an air delivery pipe (7). The air delivery pipe (7) is provided with a valve. The output end of the air delivery pipe (7) is connected to the heat recovery mechanism. The heat recovery mechanism is mounted on the base plate (1). The heat recovery mechanism has the function of collecting heat. The output end of the heat recovery mechanism is connected to the input pipe (9) through the air pipe A (8). The output end of the input pipe (9) is connected to the desulfurization tower (2). A filter is provided on the input pipe (9). The air pipe A (8) is provided with a valve.

2. The boiler flue gas dust removal, desulfurization and denitrification equipment according to claim 1, characterized in that: The heat recovery mechanism comprises a heat exchange mechanism, a bracket (10), a heat exchange cylinder (11) and a water outlet pipe (12); the heat exchange cylinder (11) is fixedly mounted on the bottom plate (1) via the bracket (10); a chamber is arranged in the heat exchange cylinder (11); a water outlet pipe (12) communicating with the chamber is arranged at the lower part of the heat exchange cylinder (11); a valve is arranged on the water outlet pipe (12); water is arranged in the chamber of the heat exchange cylinder (11); the heat exchange mechanism is mounted on the heat exchange cylinder (11); the middle part of the heat exchange mechanism is located in the chamber of the heat exchange cylinder (11); the input end of the heat exchange mechanism is connected to the gas transmission pipe (7); the output end of the heat exchange mechanism is connected to the gas pipe A (8); and the heat exchange mechanism has a heat exchange function.

3. The boiler flue gas dust removal, desulfurization and denitrification equipment according to claim 2, characterized in that: The heat exchange mechanism comprises a driving mechanism, a rotary joint A (13), a connecting pipe A (14), a transverse pipe A (15), a plurality of groups of heat exchange pipes (16), a transverse pipe B (17), a connecting pipe B (18), a rotary joint B (19), a pipeline (20), a delivery pipe (21) and a stop valve (22). The rotary joint A (13) is fixedly mounted on the lower part of the heat exchange cylinder (11), the connecting pipe A (14) is rotatably mounted on the rotary joint A (13) and the heat exchange cylinder (11), the connecting pipe A (14) is connected to the rotary joint A (13), the transverse pipe A (15) is connected to the connecting pipe A (14), the lower ends of the plurality of groups of heat exchange pipes (16) are connected to the transverse pipe A (15), the upper ends of the plurality of groups of heat exchange pipes (16) are connected to the transverse pipe B (17), the lower end of the connecting pipe B (18) is connected to the transverse pipe B (17), and the lower end of the connecting pipe B (18) is connected to the transverse pipe B (17). The heat exchange tube (11) and the rotary joint (19) are connected to each other, the connecting pipe (18) is rotatably mounted on the heat exchange tube (11) and the rotary joint (19), the rotary joint (19) is fixedly mounted on the upper end of the heat exchange tube (11), the lower end of the pipeline (20) is connected to the rotary joint (19), a driving mechanism is mounted on the connecting pipe (18) and the heat exchange tube (11), the driving mechanism is used to drive the connecting pipe (18) to rotate, the input end of the air pipe A (8) is connected to the pipeline (20), the upper end of the delivery pipe (21) is connected to the rotary joint A (13), a stop valve (22) is provided on the delivery pipe (21), the lower end of the delivery pipe (21) is open, the output end of the air delivery pipe (7) is connected to the delivery pipe (21), the plurality of heat exchange tubes (16) are located in the chamber of the heat exchange tube (11), and the connecting pipe A (14) and the connecting pipe B (18) are coaxial.

4. The boiler flue gas dust removal, desulfurization and denitrification equipment according to claim 3, characterized in that: The driving mechanism comprises a bevel gear A (23), a bevel gear B (24), a driving shaft (25) and a driving motor (26); the bevel gear A (23) is fixedly sleeved on the connecting pipe B (18); the bevel gear A (23) is meshed with the bevel gear B (24); the bevel gear B (24) is fixedly mounted on the driving shaft (25); the driving shaft (25) is rotatably mounted on the heat exchange cylinder (11); the input end of the driving shaft (25) is connected to the driving motor (26); and the driving motor (26) is fixedly mounted on the heat exchange cylinder (11).

5. The boiler flue gas dust removal, desulfurization and denitrification equipment according to claim 3, characterized in that: The heat exchanger also comprises a water pump (27), a water pipe (28), a drainage pipe A (29) and a drainage pipe B (30). The water pump (27) is fixedly mounted on the heat exchanger tube (11). The output end of the water pump (27) is connected to the water pipe (28). The input ends of the drainage pipe A (29) and the drainage pipe B (30) are both connected to the water pipe (28). The drainage pipe A (29) and the drainage pipe B (30) are both provided with valves. The output end of the drainage pipe B (30) is in communication with the upper part of the chamber of the heat exchanger tube (11). The output end of the drainage pipe A (29) is connected to the pipeline (20).

6. The boiler flue gas dust removal, desulfurization and denitrification equipment according to claim 2, characterized in that: The heat exchange cylinder (11) is provided with a thermometer.

7. The boiler flue gas dust removal, desulfurization and denitrification equipment according to claim 3, characterized in that: The material of the multiple groups of heat exchange tubes (16) is a heat-resistant material.

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