Desulfurization, denitration and dust removal device for boiler tail gas

Abstract

The invention relates to the technical field of boiler tail gas treatment equipment, in particular to a boiler tail gas desulfurization, denitrification and dust removal device which comprises a boiler, a denitrification tower and a desulfurization tower, a pretreatment unit and an activated carbon treatment unit are arranged between the boiler and the denitrification tower, and the pretreatment unit comprises a spray tower arranged outside the boiler; a spiral flow deflector is mounted on the inner wall of the spray tower; a cooling tail gas conveying pipe and a steam collecting and conveying pipe are arranged above the conical collecting column; under the mutual cooperation of the pretreatment unit and the activated carbon treatment unit, the shutdown time of the boiler can be shortened, the replacement efficiency of the activated carbon fixed bed is further improved, the tail gas treatment efficiency is further guaranteed, meanwhile, the activated carbon fixed bed can be directly cleaned, regenerated and replaced, and the utilization efficiency of the activated carbon fixed bed is further guaranteed; the disassembly and replacement efficiency of the activated carbon fixed bed is further reduced, and the tail gas treatment efficiency is further guaranteed.

Description

Technical Field

[0001] This invention relates to the technical field of boiler exhaust gas treatment equipment, and in particular to a boiler exhaust gas desulfurization, denitrification and dust removal device. Background Technology

[0002] A boiler is an energy conversion device. The energy input to a boiler includes the chemical energy of fuel and electrical energy. The boiler outputs steam, high-temperature water, or organic heat carriers with a certain amount of thermal energy.

[0003] Industrial boiler exhaust gas treatment has always been a key area of ​​environmental protection engineering. Existing boiler exhaust gas treatment devices mostly adopt a treatment method of dust removal, followed by denitrification, and finally desulfurization. In the process of dust removal of exhaust gas, activated carbon fixed bed is usually used to treat the exhaust gas. After a period of use, the existing activated carbon needs to be replaced to avoid activated carbon failure. However, the existing exhaust gas dust removal device requires long-term shutdown to replace the activated carbon, which leads to a decrease in exhaust gas treatment efficiency. At the same time, the cost increases after each use and replacement of activated carbon.

[0004] Therefore, we provide a boiler exhaust gas desulfurization, denitrification and dust removal device. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned technical problems by providing a boiler exhaust gas desulfurization, denitrification, and dust removal device, which enables rapid replacement of activated carbon dust removal devices.

[0006] In view of this, the present invention provides a boiler exhaust gas desulfurization, denitrification and dust removal device, including a boiler, a denitrification tower and a desulfurization tower, wherein a pretreatment unit and an activated carbon treatment unit are provided between the boiler and the denitrification tower. The pretreatment unit includes a spray tower located outside the boiler. The inner wall of the spray tower is equipped with spiral guide vanes, and a conical collection column is installed inside the spray tower. A cooling tail gas conveying pipe and a steam collection conveying pipe are installed above the conical collection column. The activated carbon treatment unit includes a solid support block disposed outside the spray tower. Inside the solid support block are an activated carbon dust removal tower, an activated carbon cleaning tower, and an activated carbon regeneration tower. Each of the activated carbon dust removal tower, activated carbon cleaning tower, and activated carbon regeneration tower contains several fixed activated carbon beds. The inner walls of each of the activated carbon dust removal tower, activated carbon cleaning tower, and activated carbon regeneration tower have several activated carbon bed replacement slots extending through them. The solid support block has several circular rotating slots extending through it. An intelligent servo motor is mounted on the upper end of the solid support block. A rotating column is mounted on the output end of the intelligent servo motor. Several connecting blocks are mounted on the outer surface of the rotating column. Several high-temperature resistant sealing rings are mounted on the outer surface of the solid support block.

[0007] Preferably, a hot exhaust gas conveying pipe is fixedly connected to the upper end of the boiler, one end of the hot exhaust gas conveying pipe is fixedly connected to the lower end of the spray tower, one end of the cooling exhaust gas conveying pipe is fixedly connected to the upper end of the spray tower, one end of the steam collection and conveying pipe is located inside the cooling exhaust gas conveying pipe, and the other end of the steam collection and conveying pipe is inserted through and connected to the outside of the steam collection and conveying pipe.

[0008] Preferably, the conical collecting column is located above the spiral guide vane, the conical collecting column is inverted conical, the lower end of the conical collecting column is fixedly connected to one end of the steam collecting and conveying pipe, and the conical collecting column, the cooling exhaust gas conveying pipe and the steam collecting and conveying pipe are concentrically arranged.

[0009] Preferably, the outer surface of the conical collecting column does not contact the inner wall of the spray tower, and a plurality of fixed columns are installed on the outer surface of the conical collecting column, and the conical collecting column is fixedly connected to the upper inner wall of the spray tower through the fixed columns.

[0010] Preferably, the solid support block has three fixing holes equidistantly distributed around its upper surface, and the activated carbon dust removal tower, the activated carbon cleaning tower, and the activated carbon regeneration tower are respectively embedded in the three fixing holes.

[0011] Preferably, the other end of the cooling exhaust gas conveying pipe is fixedly connected to the upper end of the activated carbon dust removal tower, and the other end of the steam collection and conveying pipe is fixedly connected to the upper end of the activated carbon regeneration tower.

[0012] Preferably, the circular rotating grooves are vertically equidistant, and the circular rotating grooves are connected to the fixing holes. The outer surface of the solid support block is equipped with a number of hollow arc-shaped sealing blocks, and the hollow arc-shaped sealing blocks are positioned corresponding to the circular rotating grooves.

[0013] Preferably, the activated carbon fixed bed replacement groove corresponds to the circular rotating groove inside the solid support block, and both the high-temperature resistant sealing ring and the activated carbon fixed bed rotate inside the circular rotating groove. The high-temperature resistant sealing ring is adapted to the size of the activated carbon fixed bed replacement groove.

[0014] Preferably, the upper surface of the solid support block is provided with a driving hole, the driving hole and the circular rotating groove are concentrically arranged, and the rotating column and the connecting block both rotate inside the driving hole.

[0015] Preferably, an N-type conveying pipe is inserted through the outer surface of the activated carbon regeneration tower, and a drain pipe is inserted through the lower end of both the activated carbon regeneration tower and the activated carbon cleaning tower.

[0016] Compared with the prior art, the present invention provides a boiler exhaust gas desulfurization, denitrification and dust removal device, which has the following beneficial effects: 1. The present invention, through the cooperation of the pretreatment unit and the activated carbon treatment unit, can reduce boiler downtime, further improve the replacement efficiency of the activated carbon fixed bed, and further ensure the efficiency of tail gas treatment.

[0017] 2. With the cooperation of the pretreatment unit and the activated carbon treatment unit, the activated carbon fixed bed can be directly cleaned, regenerated and replaced, further ensuring the utilization efficiency of the activated carbon fixed bed. At the same time, it further reduces the disassembly and replacement efficiency of the activated carbon fixed bed, further ensuring the treatment efficiency of the exhaust gas.

[0018] 3. With the help of the activated carbon fixed bed, the present invention can simultaneously achieve desulfurization, denitrification and dust removal effects on the exhaust gas, reduce the treatment pressure of subsequent denitrification and desulfurization, and further ensure the desulfurization, denitrification and dust removal effects of the exhaust gas.

[0019] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This invention has a simple structure and is easy to operate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a boiler exhaust gas desulfurization, denitrification and dust removal device proposed in this invention. Figure 2 This is a schematic diagram of the pretreatment unit of a boiler exhaust gas desulfurization, denitrification and dust removal device proposed in this invention; Figure 3 This is an enlarged schematic diagram of point A of a boiler exhaust gas desulfurization, denitrification and dust removal device proposed in this invention; Figure 4 This is a schematic diagram of the activated carbon treatment unit of a boiler exhaust gas desulfurization, denitrification and dust removal device proposed in this invention; Figure 5 This is a schematic diagram of a solid support block for a boiler exhaust gas desulfurization, denitrification and dust removal device proposed in this invention; Figure 6 This is a schematic diagram of the activated carbon fixed bed replacement operation of a boiler exhaust gas desulfurization, denitrification and dust removal device proposed in this invention; Figure 7 This is a schematic diagram of the activated carbon treatment component of a boiler exhaust gas desulfurization, denitrification and dust removal device proposed in this invention.

[0021] In the diagram: 1. Boiler; 2. Pretreatment unit; 201. Spray tower; 202. Spiral guide vane; 203. Conical collection column; 204. Fixed column; 3. Activated carbon treatment unit; 301. Solid support block; 302. Fixing hole; 303. Circular rotating trough; 304. Activated carbon dust removal tower; 305. Activated carbon cleaning tower; 306. Activated carbon regeneration tower; 307. Activated carbon fixed bed replacement trough; 308. Intelligent servo motor; 309. Rotating column; 310. Connecting block; 311. High-temperature resistant sealing ring; 312. Activated carbon fixed bed; 313. Drive hole; 314. Hollow arc-shaped sealing block; 4. Denitrification tower; 5. Desulfurization tower; 6. Hot tail gas conveying pipe; 7. Cooling tail gas conveying pipe; 8. Steam collection and conveying pipe. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] Example: A boiler exhaust gas desulfurization, denitrification, and dust removal device, such as... Figures 1-7 As shown, it includes a boiler 1, a denitrification tower 4 and a desulfurization tower 5. A pretreatment unit 2 and an activated carbon treatment unit 3 are provided between the boiler 1 and the denitrification tower 4. The pretreatment unit 2 includes a spray tower 201 located outside the boiler 1. The inner wall of the spray tower 201 is equipped with a spiral guide vane 202. A conical collection column 203 is located inside the spray tower 201. A cooling tail gas conveying pipe 7 and a steam collection conveying pipe 8 are located above the conical collection column 203. The activated carbon treatment unit 3 includes a solid support block 301 disposed outside the spray tower 201. Inside the solid support block 301 are an activated carbon dust removal tower 304, an activated carbon cleaning tower 305, and an activated carbon regeneration tower 306. Each of the activated carbon dust removal tower 304, activated carbon cleaning tower 305, and activated carbon regeneration tower 306 has several activated carbon fixed beds 312. The inner walls of the activated carbon dust removal tower 304, activated carbon cleaning tower 305, and activated carbon regeneration tower 306 are all permeated with several activated carbon fixed bed replacement slots 307. The solid support block 301 has several circular rotating slots 303 permeated inside. An intelligent servo motor 308 is installed at the upper end of the solid support block 301. A rotating column 309 is installed at the output end of the intelligent servo motor 308. Several connecting blocks 310 are installed on the outer surface of the rotating column 309. Several high-temperature resistant sealing rings 311 are installed on the outer surface of the solid support block 301.

[0025] A hot exhaust gas conveying pipe 6 is fixedly connected to the upper end of the boiler 1. One end of the hot exhaust gas conveying pipe 6 is fixedly connected to the lower end of the spray tower 201. One end of the cooling exhaust gas conveying pipe 7 is fixedly connected to the upper end of the spray tower 201. One end of the steam collection and conveying pipe 8 is located inside the cooling exhaust gas conveying pipe 7, and the other end of the steam collection and conveying pipe 8 is inserted through and connected to the outside of the steam collection and conveying pipe 8.

[0026] The conical collecting column 203 is located above the spiral guide vane 202. The conical collecting column 203 is set in an inverted cone shape. The lower end of the conical collecting column 203 is fixedly connected to one end of the steam collecting and conveying pipe 8. The conical collecting column 203, the cooling exhaust gas conveying pipe 7, and the steam collecting and conveying pipe 8 are concentrically arranged.

[0027] The outer surface of the conical collecting column 203 does not contact the inner wall of the spray tower 201. Several fixed columns 204 are installed on the outer surface of the conical collecting column 203, and the conical collecting column 203 is fixedly connected to the upper inner wall of the spray tower 201 through the fixed columns 204.

[0028] The solid support block 301 has three fixing holes 302 evenly distributed around its upper surface. The activated carbon dust removal tower 304, the activated carbon cleaning tower 305, and the activated carbon regeneration tower 306 are respectively embedded in the three fixing holes 302.

[0029] The other end of the cooling exhaust gas conveying pipe 7 is fixedly connected to the upper end of the activated carbon dust removal tower 304, and the other end of the steam collection and conveying pipe 8 is fixedly connected to the upper end of the activated carbon regeneration tower 306.

[0030] Several circular rotating grooves 303 are vertically and equidistantly distributed. The circular rotating grooves 303 and the fixing holes 302 are connected. Several hollow arc-shaped sealing blocks 314 are installed on the outer surface of the solid support block 301. The hollow arc-shaped sealing blocks 314 are positioned corresponding to the circular rotating grooves 303.

[0031] The activated carbon fixed bed replacement groove 307 corresponds to the circular rotating groove 303 inside the solid support block 301. The high-temperature resistant sealing ring 311 and the activated carbon fixed bed 312 both rotate inside the circular rotating groove 303. The high-temperature resistant sealing ring 311 is compatible with the size of the activated carbon fixed bed replacement groove 307.

[0032] A drive hole 313 is provided on the upper surface of the solid support block 301. The drive hole 313 and the circular rotating groove 303 are concentrically arranged. The rotating column 309 and the connecting block 310 both rotate inside the drive hole 313.

[0033] An N2 delivery pipe is inserted through the outer surface of the activated carbon regeneration tower 306, and a sewage discharge pipe is inserted through the lower end of both the activated carbon regeneration tower 306 and the activated carbon cleaning tower 305.

[0034] The existing boiler flue gas desulfurization, denitrification, and dust removal device, during operation, transports the flue gas generated by boiler 1 to the activated carbon dust removal tower 304, then the dust-removed flue gas is transported to the denitrification tower 4 for denitrification treatment, and the denitrified flue gas re-enters the desulfurization tower 5 for desulfurization treatment. This process is a known technology. To further improve the desulfurization, denitrification, and dust removal effect of the flue gas and to further reduce the replacement time of the dust removal device, a pretreatment unit 2 and an activated carbon treatment unit 3 are set up. First, the boiler flue gas enters the spray tower 201 through the hot flue gas conveying pipe 6. The spray tower 201 cools the superheated flue gas from the boiler. Since the hot flue gas conveying pipe 6 adopts a variable diameter design, as the flue gas gradually moves into the spray tower 201, the movement speed of the flue gas inside the hot flue gas conveying pipe 6 will gradually increase. When the flue gas enters the spray tower 201... Under the guidance of the spiral guide vane 202, the exhaust gas will generate centrifugal force and then move upward in the form of a vortex. At the same time, under the action of spraying, the exhaust gas will form hot steam when it comes into contact with cold water. Since the weight of steam is less than the weight of exhaust gas, under the centrifugal effect, the steam will move upward at the center of the vortex, and the exhaust gas will be thrown onto the inner wall of the spray tower 201. As the exhaust gas and steam move upward, the steam will enter the steam collection and conveying pipe 8 from the central hole at the lower end of the inverted cone-shaped collection column 203, and be transported to the activated carbon regeneration tower 306 through the steam collection and conveying pipe 8. The high-temperature steam is collected to ensure the heat inside the activated carbon regeneration tower 306. The exhaust gas thrown onto the inner wall will continue to move upward along the outer wall of the cone-shaped collection column 203, and then the cooled exhaust gas will enter the cooled exhaust gas conveying pipe 7, and be transported to the activated carbon dust removal tower 304 through the cooled exhaust gas conveying pipe 7. The exhaust gas entering the activated carbon dust removal tower 304 will be treated by the multi-layer activated carbon fixed bed 312. Based on the action of activated carbon, the sulfur and nitrate in the exhaust gas can be treated simultaneously, further improving the desulfurization, denitrification, and dust removal effect. The dust-removed exhaust gas will enter the desulfurization tower 5 and the hot exhaust gas conveying pipe 6 through pipelines. This conveying process is a known technology and will not be described in detail here. After prolonged use, the activated carbon inside the activated carbon dust removal tower 304 will lose its activity. To reduce the replacement time of the activated carbon, a set of activated carbon fixed beds 312 is installed inside both the activated carbon regeneration tower 306 and the activated carbon fixed bed replacement tank 307. When replacing the activated carbon fixed bed 312 inside the activated carbon dust removal tower 304, the boiler 1 is stopped to prevent the exhaust gas from running wildly inside the solid support block 301. Then, the intelligent servo motor 308 is started, which drives the rotating column 309 to rotate. The moving connecting block 310 and the activated carbon fixed bed 312 rotate synchronously inside the activated carbon fixed bed replacement tank 307 and the circular rotating tank 303 until the high-temperature resistant sealing ring 311 inside the activated carbon regeneration tower 306 is in contact with the inner wall of the activated carbon fixed bed replacement tank 307, thus completing the replacement of the activated carbon fixed bed 312 inside the activated carbon dust removal tower 304. During this process, the rotation angle of the activated carbon fixed bed 312 can be precisely controlled by the intelligent servo motor 308. This is a known technology and will not be described in detail here. After all the activated carbon fixed beds 312 have been used, in order to ensure the regeneration effect of the activated carbon fixed beds 312, the used activated carbon fixed beds 312 are rinsed by the activated carbon cleaning tower 305. Then, the activated carbon fixed beds 312 are restored to high-temperature activity by the high-temperature steam and N2 gas inside the activated carbon regeneration tower 306. At this time, the first set of activated carbon fixed beds 312 used is located inside the activated carbon regeneration tower 306. During the exhaust gas treatment process, both the pipelines and towers are made of high-temperature resistant and corrosion-resistant materials. Furthermore, the connections between the pipelines and towers are made using flange connections for easy installation and disassembly. During the rotation and replacement of the activated carbon fixed bed 312, the high-temperature resistant sealing ring 311 effectively seals the activated carbon fixed bed replacement trough 307, ensuring the sealing effect during the operation of the activated carbon dust removal tower 304, activated carbon cleaning tower 305, and activated carbon regeneration tower 306. Simultaneously, during the operation of the activated carbon cleaning tower 305 and activated carbon regeneration tower 306, residual material dripping from inside the activated carbon fixed bed 312 is discharged through a drain pipe. This drain pipe is intelligently controlled, a known technology that will not be elaborated upon here. Finally, the hollow arc-shaped sealing block 314 prevents the activated carbon fixed bed 312 from contacting external air, further ensuring the operational stability of the activated carbon fixed bed 312. With the cooperation of the pretreatment unit 2 and the activated carbon treatment unit 3, firstly, the downtime of boiler 1 can be reduced, further improving the replacement efficiency of the activated carbon fixed bed 312 and further ensuring the efficiency of tail gas treatment. Secondly, the activated carbon fixed bed 312 can be directly cleaned, regenerated, and replaced, further ensuring the utilization efficiency of the activated carbon fixed bed 312. At the same time, the disassembly and replacement efficiency of the activated carbon fixed bed 312 is further reduced, further ensuring the tail gas treatment efficiency. Finally, under the action of the activated carbon fixed bed 312, the tail gas can simultaneously achieve desulfurization, denitrification, and dust removal effects, reducing the subsequent denitrification and desulfurization treatment pressure and further ensuring the desulfurization, denitrification, and dust removal effects of the tail gas.

[0035] Working principle: The boiler exhaust gas enters the spray tower 201 through the hot exhaust gas conveying pipe 6. As the exhaust gas gradually moves into the spray tower 201 through the variable-diameter hot exhaust gas conveying pipe 6, its movement speed gradually increases. When the exhaust gas enters the spray tower 201, under the guidance of the spiral guide vanes 202, the exhaust gas undergoes centrifugal force and moves upward in the form of a vortex. Simultaneously, the spraying action cools the exhaust gas. The hot steam formed by the contact between the exhaust gas and cold water will rise at the center of the vortex due to centrifugal force, while the exhaust gas will be thrown against the inner wall of the spray tower 201. As the exhaust gas and steam rise, the steam will enter the steam collection and conveying pipe 8 through the central orifice at the lower end of the inverted cone-shaped collection column 203, and then be transported to the activated carbon regeneration tower 306 through the steam collection and conveying pipe 8 to achieve the heating effect of the activated carbon regeneration tower 306. The exhaust gas thrown against the inner wall will then enter the cooling exhaust gas conveying pipe along the cone-shaped collection column 203. Inside the feed pipe 7, the exhaust gas is transported to the activated carbon dust removal tower 304 via the cooling exhaust gas conveying pipe 7. The exhaust gas entering the activated carbon dust removal tower 304 will be dusted by the activated carbon fixed bed 312, and then enter the desulfurization tower 5 and the hot exhaust gas conveying pipe 6 through the pipeline to achieve denitrification and desulfurization effects. After a period of use, the intelligent servo motor 308 will drive the rotating column 309, the connecting block 310 and the activated carbon fixed bed 312 to rotate inside the circular rotating groove 303 to replace the activated carbon fixed bed 312 inside the activated carbon dust removal tower 304. At the same time, the used activated carbon fixed bed 312 will first enter the activated carbon cleaning tower 305 for rinsing. When the intelligent servo motor 308 runs again, the activated carbon fixed bed 312 used for the first time will enter the activated carbon regeneration tower 306. The high temperature steam inside the activated carbon regeneration tower 306 will restore the activity of the activated carbon fixed bed 312, realizing the rapid replacement and recycling of the activated carbon fixed bed 312.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A boiler exhaust gas desulfurization, denitrification, and dust removal device, comprising a boiler (1), a denitrification tower (4), and a desulfurization tower (5), characterized in that, A pretreatment unit (2) and an activated carbon treatment unit (3) are provided between the boiler (1) and the denitrification tower (4). The pretreatment unit (2) includes a spray tower (201) located outside the boiler (1). The inner wall of the spray tower (201) is equipped with a spiral guide vane (202). A conical collection column (203) is provided inside the spray tower (201). A cooling tail gas conveying pipe (7) and a steam collection and conveying pipe (8) are provided above the conical collection column (203). The activated carbon treatment unit (3) includes a solid support block (301) disposed outside the spray tower (201). Inside the solid support block (301) are an activated carbon dust removal tower (304), an activated carbon cleaning tower (305), and an activated carbon regeneration tower (306). Each of the activated carbon dust removal tower (304), the activated carbon cleaning tower (305), and the activated carbon regeneration tower (306) contains several activated carbon fixed beds (312). The inner wall of the activated carbon regeneration tower (306) is provided with several activated carbon fixed bed replacement slots (307). The solid support block (301) is provided with several circular rotating slots (303). The upper end of the solid support block (301) is equipped with an intelligent servo motor (308). The output end of the intelligent servo motor (308) is equipped with a rotating column (309). The outer surface of the rotating column (309) is equipped with several connecting blocks (310). The outer surface of the solid support block (301) is equipped with several high-temperature resistant sealing rings (311).

2. The boiler exhaust gas desulfurization, denitrification, and dust removal device according to claim 1, characterized in that, The upper end of the boiler (1) is fixedly connected to a hot exhaust gas conveying pipe (6). One end of the hot exhaust gas conveying pipe (6) is fixedly connected to the lower end of the spray tower (201). One end of the cooling exhaust gas conveying pipe (7) is fixedly connected to the upper end of the spray tower (201). One end of the steam collection and conveying pipe (8) is located inside the cooling exhaust gas conveying pipe (7), and the other end of the steam collection and conveying pipe (8) is inserted through and connected to the outside of the steam collection and conveying pipe (8).

3. The boiler exhaust gas desulfurization, denitrification, and dust removal device according to claim 1, characterized in that, The conical collecting column (203) is located above the spiral guide vane (202). The conical collecting column (203) is arranged in an inverted cone shape. The lower end of the conical collecting column (203) is fixedly connected to one end of the steam collecting and conveying pipe (8). The conical collecting column (203), the cooling exhaust gas conveying pipe (7), and the steam collecting and conveying pipe (8) are arranged concentrically.

4. The boiler exhaust gas desulfurization, denitrification, and dust removal device according to claim 1, characterized in that, The outer surface of the conical collecting column (203) does not contact the inner wall of the spray tower (201). Several fixed columns (204) are installed on the outer surface of the conical collecting column (203). The conical collecting column (203) is fixedly connected to the upper inner wall of the spray tower (201) through the fixed columns (204).

5. The boiler exhaust gas desulfurization, denitrification, and dust removal device according to claim 1, characterized in that, The solid support block (301) has three fixing holes (302) evenly distributed around its upper surface. The activated carbon dust removal tower (304), the activated carbon cleaning tower (305), and the activated carbon regeneration tower (306) are respectively embedded in the three fixing holes (302).

6. The boiler exhaust gas desulfurization, denitrification, and dust removal device according to claim 1, characterized in that, The other end of the cooling exhaust gas conveying pipe (7) is fixedly connected to the upper end of the activated carbon dust removal tower (304), and the other end of the steam collection and conveying pipe (8) is fixedly connected to the upper end of the activated carbon regeneration tower (306).

7. The boiler exhaust gas desulfurization, denitrification, and dust removal device according to claim 5, characterized in that, Several circular rotating grooves (303) are vertically equidistantly distributed, and the circular rotating grooves (303) and the fixing holes (302) are connected through each other. Several hollow arc-shaped sealing blocks (314) are installed on the outer surface of the solid support block (301), and the hollow arc-shaped sealing blocks (314) are positioned corresponding to the circular rotating grooves (303).

8. A boiler exhaust gas desulfurization, denitrification, and dust removal device according to claim 5, characterized in that, The activated carbon fixed bed replacement groove (307) corresponds to the circular rotating groove (303) inside the solid support block (301). The high-temperature resistant sealing ring (311) and the activated carbon fixed bed (312) both rotate inside the circular rotating groove (303). The high-temperature resistant sealing ring (311) is adapted to the size of the activated carbon fixed bed replacement groove (307).

9. A boiler exhaust gas desulfurization, denitrification, and dust removal device according to claim 1, characterized in that, The solid support block (301) has a drive hole (313) on its upper surface. The drive hole (313) and the circular rotating groove (303) are concentrically arranged. The rotating column (309) and the connecting block (310) both rotate inside the drive hole (313).

10. A boiler exhaust gas desulfurization, denitrification, and dust removal device according to claim 1, characterized in that, An N2 delivery pipe is inserted through the outer surface of the activated carbon regeneration tower (306), and a sewage discharge pipe is inserted through the lower end of both the activated carbon regeneration tower (306) and the activated carbon cleaning tower (305).

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