A boiler dust removal, desulfurization and denitration system

Abstract

This application provides a boiler dust removal, desulfurization, and denitrification system, relating to the field of boiler dust removal, desulfurization, and denitrification technology. It includes a dust collector / desulfurizer, a desulfurization tower, a water pump, a clear water tank, and a circulating water tank. The bottom of the circulating water tank is connected to a transition tank via a pipe, and the bottom of the transition tank is connected to an alkali pump via a pipe. The inlet of the alkali pump is connected to an alkali tank via a pipe. The bottom of the desulfurization tower and the transition tank are connected via a pipe. The top of the dust collector / desulfurizer is connected to a Z-shaped exhaust pipe, one end of which is connected to a chimney. The key technical point is that the alkali pump draws the alkaline solution from the alkali tank into the transition tank. When multiple water pumps pump clear water and alkaline solution into the desulfurization tower, forming a dynamic circulation between the desulfurization tower, clear water tank, circulating water tank, and transition tank, the alkaline solution in the transition tank mixes with the clear water in the clear water tank, and then performs desulfurization and denitrification within the dust collector / desulfurizer, which helps ensure the desulfurization and denitrification effect.

Description

Technical Field

[0001] This utility model relates to the field of boiler dust removal, desulfurization and denitrification technology, specifically a boiler dust removal, desulfurization and denitrification system. 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] Coal-fired flue gas contains large amounts of soot, sulfides, and nitrogen oxides, making it a major source of environmental pollution. With increasing public awareness of environmental protection, standards for flue gas emission purification have rapidly increased, particularly stringent emission standards for coal-fired power generation boilers.

[0004] During the energy conversion process of boilers through fuel combustion, dust removal, desulfurization, and denitrification systems are configured to ensure that the combustion exhaust gas meets emission standards. However, in existing dust removal, desulfurization, and denitrification systems, alkaline powder adsorbents are used in combination with exhaust gas for desulfurization. This often results in the adsorbent failing to react with the exhaust gas and being discharged to the outside with dust. The dry dust removal and desulfurization system for coal-fired boilers (announcement number CN106110870B) also reflects this problem in its technical solution. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this application provides a boiler dust removal, desulfurization, and denitrification system. A transition tank is connected between the desulfurization tower and the circulating water tank. An alkaline pump draws the alkaline solution from the alkaline tank into the transition tank. When multiple pumps pump clean water and the alkaline solution into the desulfurization tower, the alkaline solution in the transition tank flows through the circulating water tank, first mixing with the clean water in the clean water pool, and finally atomizes inside the dust removal and desulfurization unit to perform desulfurization and denitrification. During the reaction, the reacted solution falls to the bottom and flows into the transition tank, thus returning to the circulating water tank, which helps ensure the desulfurization and denitrification effect.

[0006] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0007] A boiler dust removal, desulfurization and denitrification system includes a dust collector and a desulfurization tower. The desulfurization tower is located on one side of the bottom of the dust collector and the top of the tower is connected to one side of the top of the dust collector and the desulfurization tower through a pipe.

[0008] Multiple water pumps are connected to one side of the top of the dust collector and desulfurizer via multiple pipes. The inlet of the multiple water pumps is connected to the same clear water tank via pipes. The clear water tank is connected to a circulating water tank via pipes. The bottom of the circulating water tank is connected to a transition tank via pipes. The bottom of the transition tank is connected to an alkali pump via pipes. The inlet of the alkali pump is connected to an alkali tank via pipes.

[0009] The top of the dust collector and desulfurizer is connected to a Z-shaped exhaust pipe, and one end of the exhaust pipe is connected to a chimney.

[0010] The bottom of the desulfurization tower and the transition tank are connected by a pipeline.

[0011] In one possible implementation, a secondary heat exchange assembly is connected to one side of the bottom of the desulfurization tower via a pipe, an induced draft fan is connected to one side of the secondary heat exchange assembly via a pipe, a dust collector is connected to the air inlet of the induced draft fan via a pipe, a coal dust conveyor is assembled to the bottom of the dust collector, a primary heat exchange assembly is connected to the top of the dust collector away from the induced draft fan, and a boiler is connected to the top of one side of the primary heat exchange assembly.

[0012] In one possible implementation, the bottom of the boiler is connected to multiple air inlet pipes, the bottom of which is integrally formed into a main pipe, and a blower is assembled and connected to the main pipe.

[0013] In one possible implementation, the primary heat exchange assembly includes two heat exchangers, each with heat exchange tubes inside. A transfer pipe connects the bottoms of the two heat exchangers. The boiler and the dust collector are connected by a pipeline to form a direct connection channel, and a valve is assembled and connected to this direct connection channel. Both ends of the primary heat exchange assembly are connected to this direct connection channel. The secondary heat exchange assembly consists of a heat exchanger with heat exchange tubes. Clean water flows through the inside of the heat exchange tubes and exchanges heat with the air inside the heat exchanger.

[0014] In one possible implementation, a primary dust and sulfur discharge port is assembled and connected at the outer corner of the top of the exhaust pipe, and a first guide plate is assembled and connected to the inner wall of the exhaust pipe.

[0015] The primary dust and sulfur discharge port and the first guide plate are both inclined from top to bottom, and the top surface of the first guide plate is in contact with the bottom surface of the primary dust and sulfur discharge port.

[0016] In one possible implementation, the bottom of the exhaust pipe is assembled with two secondary dust and sulfur discharge ports, and the bottom inner wall of the exhaust pipe is assembled with two second guide plates; both second guide plates are in an inclined state and are arranged in parallel, and the orientation of the two second guide plates is opposite to the direction of air flow in the exhaust pipe.

[0017] In one possible implementation, the circulating water tank is internally assembled with two intersecting partition plates. The vertically arranged partition plate has a third water outlet at its top and a first water outlet at its bottom. The horizontally arranged partition plate has a second water outlet inside one side. Water flows from the inside of the first water outlet to the inside of the second water outlet and then flows out from the inside of the third water outlet.

[0018] In one possible implementation, a first anti-backflow component is provided on both sides of the bottom inner wall of the circulating water tank and at the top of one side of the horizontally arranged partition plate. The first anti-backflow component includes a first collection hopper, and a guide pyramid is provided at the bottom of the first collection hopper. A second anti-backflow component is provided at the top of the other side of the partition plate. The second anti-backflow component includes a second collection hopper, and a guide frustum is provided at the bottom of the second collection hopper.

[0019] The first collecting hopper is fixed to the surface of the vertical partition plate and the side wall of the circulating water tank on both sides, and the guide pyramid is fixed to the bottom inner wall of the circulating water tank or the top surface of the horizontal partition plate. The second collecting hopper is fixed to the surface of the vertical partition plate and the side wall of the circulating water tank on both sides, and the guide pyramid tube is fixed to the top inner wall of the third horizontal outlet and covers the second outlet.

[0020] The beneficial effects of this application are as follows:

[0021] Firstly, in this scheme, a transition tank is connected between the desulfurization tower and the circulating water tank, and an alkaline pump is used to pump the alkaline solution inside the alkaline tank into the transition tank. When multiple water pumps pump clean water and alkaline solution into the desulfurization tower, the alkaline solution inside the transition tank flows into the clean water pool through the circulating water tank and mixes with the clean water. Finally, it is atomized inside the dust collector and desulfurizer to carry out desulfurization and denitrification. During the reaction, the solution after the reaction falls to the bottom and flows into the transition tank, thus returning to the circulating water tank, which helps to ensure the desulfurization and denitrification effect.

[0022] Secondly, in this scheme, by allowing the sulfide dust and coal dust obtained from the reaction to enter the interior of the exhaust pipe, guided by the first guide plate and collected by the first-stage dust and sulfur discharge port, and blocked and guided by the two second guide plates and collected internally by the two second-stage dust and sulfur discharge ports, it is easier to make the gas finally emitted from inside the chimney meet the emission requirements.

[0023] Thirdly, in this scheme, the interior of the circulating water tank is divided into four areas by using two intersecting partitions. When the mixture of water and solution carries the precipitate back from the bottom of the desulfurization tower to the interior of the transition tank, it flows into the interior of the circulating water tank along with the alkaline solution and water. The precipitate and water then pass through the interior of the first outlet, the second outlet and the third outlet in succession. With the guidance of the first collection hopper and the guide pyramid, and the second collection hopper and the guide frustum tube, the effect of collecting the precipitate into the interior of the circulating water tank can be guaranteed. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the primary heat exchange component of this utility model;

[0026] Figure 3 This is a schematic diagram of the exhaust pipe structure of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the circulating water tank of this utility model.

[0028] Attached reference numerals: 1. Boiler; 2. Air inlet duct; 3. Blower; 4. Primary heat exchange assembly; 401. Heat exchange tube; 402. Heat exchanger; 403. Transfer pipe; 5. Coal dust conveyor; 6. Dust collector; 7. Exhaust fan; 8. Secondary heat exchange assembly; 9. Chimney; 10. Dust collector and desulfurizer; 11. Desulfurization tower; 12. Water pump; 13. Clear water tank; 14. Circulating water tank; 15. Transition tank; 16. Alkali pump; 17. Alkali tank ; 18. Exhaust pipe; 19. Primary dust and sulfur discharge port; 20. First guide plate; 21. Secondary dust and sulfur discharge port; 22. Second guide plate; 23. Separator plate; 24. Third water outlet; 25. First water outlet; 26. Second water outlet; 27. First anti-backflow component; 2701. Guide pyramid; 2702. First collection hopper; 28. Second anti-backflow component; 2801. Second collection hopper; 2802. Guide pyramid tube. Detailed Implementation

[0029] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows:

[0030] Example 1:

[0031] This embodiment describes the specific structure of a boiler dust removal, desulfurization, and denitrification system. See details below. Figures 1-3As shown, it includes a dust collector and desulfurizer 10 and a desulfurization tower 11. Multiple water pumps 12 are connected to one side of the top of the dust collector and desulfurizer 10 through multiple pipes. The water inlet of the multiple water pumps 12 is connected to the same clear water tank 13 through pipes. The clear water tank 13 is connected to a circulating water tank 14 through pipes. The bottom of the circulating water tank 14 is connected to a transition tank 15 through pipes. The bottom of the transition tank 15 is connected to an alkali pump 16 through pipes. The water inlet of the alkali pump 16 is connected to an alkali tank 17 through pipes.

[0032] The top of the dust collector and desulfurizer 10 is connected to a Z-shaped exhaust pipe 18, and one end of the exhaust pipe 18 is connected to a chimney 9.

[0033] Among them, the alkali pump 16 pumps the alkaline liquid inside the alkali tank 17 into the interior of the transition tank 15. During the process of multiple water pumps 12 drawing water from the interior of the clear water pool 13 into the interior of the desulfurization tower 11, the alkaline liquid and clear water are mixed and pressed into the interior of the circulating water tank 14, and then enter the interior of the desulfurization tower 11 for preliminary desulfurization and denitrification.

[0034] Secondly, the desulfurization tower 11 is located on one side of the bottom of the dust collector and desulfurizer 10, and its top is connected to one side of the top of the dust collector and desulfurizer 10 through a pipe. The gas and coal dust that have completed the preliminary desulfurization and denitrification treatment are sent into the interior of the dust collector and desulfurizer 10 for further desulfurization and denitrification, and the coal dust is initially separated into gas and solid, so that the gas and some untreated coal dust are sent into the exhaust pipe 18.

[0035] Furthermore, the desulfurization and denitrification of the gas is carried out in the desulfurization tower 11. Since the bottom of the desulfurization tower 11 and the transition tank 15 are connected by a pipeline, the water pump 12 pumps the alkaline solution into the desulfurization tower 11, while the alkali pump 16 pumps the alkaline solution into the circulating water tank 14 through the transition tank 15. This can draw some of the gas and the falling solution from the desulfurization tower 11 into the transition tank 15, and finally react and precipitate inside the circulating water tank 14.

[0036] like Figure 1 and Figure 2 As shown, a secondary heat exchange assembly 8 is connected to one side of the bottom of the desulfurization tower 11 via a pipe. An induced draft fan 7 is connected to one side of the secondary heat exchange assembly 8 via a pipe. A dust collector 6 is connected to the air inlet of the induced draft fan 7 via a pipe. A coal dust conveyor 5 is assembled and connected to the bottom of the dust collector 6. A primary heat exchange assembly 4 is connected to the top of the dust collector 6 at the end away from the induced draft fan 7. A boiler 1 is connected to the top of one side of the primary heat exchange assembly 4. Multiple air inlet pipes 2 are connected to the bottom of the boiler 1. The bottom of the multiple air inlet pipes 2 is integrally formed into a main pipe, and a blower 3 is assembled and connected to the main pipe.

[0037] By utilizing multiple air inlet pipes 2 connected between the blower 3 and the boiler 1, the air can be introduced into the boiler 1 in a zoned manner. Compared with centralized air intake, this can further improve the combustion efficiency of coal and reduce the amount of harmful gases produced by incomplete combustion.

[0038] Secondly, the primary heat exchange assembly 4 includes two heat exchangers 402, each with a heat exchange tube 401 inside. A transfer pipe 403 connects the bottoms of the two heat exchangers 402. The boiler 1 and the dust collector 6 are connected by a pipe to form a direct connection channel, and a valve is installed on this direct connection channel. The secondary heat exchange assembly 8 consists of one heat exchanger 402 with a heat exchange tube 401. By allowing clean water to flow through the inside of the heat exchange tube 401, when the boiler 1 burns coal to generate heated air that flows through the primary heat exchange assembly 4, it can exchange heat with the air inside the heat exchanger 402 to achieve the effect of energy conversion.

[0039] Meanwhile, when the dust collector 6 initially removes dust from the air, the gas is introduced into the interior of the secondary heat exchange component 8 by the induced draft fan 7 to continue the heat exchange work, so as to reduce heat waste and perform energy conversion as much as possible.

[0040] In addition, by connecting both ends of the primary heat exchange component 4 to the direct connection channel between the boiler 1 and the dust collector 6, when maintenance of the primary heat exchange component 4 is required, maintenance personnel can perform maintenance work by disconnecting the valve, which is simple and convenient.

[0041] In some examples, a primary dust and sulfur discharge port 19 is assembled and connected at the outer corner of the top of the exhaust pipe 18, and a first guide plate 20 is assembled and connected to the inner wall of the exhaust pipe 18.

[0042] The primary dust and sulfur discharge port 19 and the first guide plate 20 are both inclined from top to bottom. The top surface of the first guide plate 20 is in contact with the bottom surface of the primary dust and sulfur discharge port 19. When the gas flows out from one end of the exhaust pipe 18 connected to the dust and sulfur remover 10 to the other end, the sulfide dust and coal dust are picked up and guided by the first guide plate 20 and fall into the interior of the primary dust and sulfur discharge port 19 to wait for collection.

[0043] Meanwhile, in order to further improve the collection efficiency of sulfide dust and coal dust, such as Figure 3As shown, the bottom of the exhaust pipe 18 is assembled with two secondary dust and sulfur discharge ports 21, and the bottom inner wall of the exhaust pipe 18 is assembled with two second guide plates 22. By making both second guide plates 22 in an inclined state and arranged in parallel, and the orientation of the two second guide plates 22 is opposite to the direction of air flow in the exhaust pipe 18, when the air flows inside the exhaust pipe 18, the sulfide dust and coal dust tend to move towards the bottom due to gravity. With the obstruction and guidance of the two second guide plates 22, the sulfide dust and coal dust can be collected in the interior of the two secondary dust and sulfur discharge ports 21.

[0044] The above design connects a transition tank 15 between the desulfurization tower 11 and the circulating water tank 14, and uses an alkali pump 16 to pump the alkaline solution inside the alkali tank 17 into the transition tank 15. When multiple water pumps 12 pump clean water and alkaline solution into the desulfurization tower 11, the alkaline solution inside the transition tank 15 flows into the clean water pool 13 through the circulating water tank 14 and mixes with the clean water. Finally, it is atomized inside the dust collector and desulfurizer 10 to carry out desulfurization and denitrification. During the reaction, the solution after the reaction falls to the bottom and flows into the transition tank 15, thus returning to the circulating water tank 14, which helps to ensure the desulfurization and denitrification effect.

[0045] Simultaneously, during the desulfurization and denitrification process, the gas enters the interior of the dust and sulfur remover 10 to continue the final desulfurization and dust removal work. The resulting sulfide dust and coal dust enter the interior of the exhaust pipe 18. Guided by the first guide plate 20, the sulfide dust and coal dust can be collected inside the primary dust and sulfur discharge port 19. Subsequently, the sulfide dust and coal dust flow with the air inside the exhaust pipe 18 and tend to move towards the bottom due to gravity. With the obstruction and guidance of the two second guide plates 22, the sulfide dust and coal dust can be collected in the two secondary dust and sulfur discharge ports 21. This makes it easier for the gas finally discharged from the chimney 9 to meet the emission requirements.

[0046] It is worth noting that the alkali pump 16 continuously pumps alkaline solution into the transition tank 15 from inside the alkali tank 17. When multiple water pumps 12 pump clean water and alkaline solution into the desulfurization tower 11, a dynamic circulation is formed between the desulfurization tower 11, the clean water pool 13, the circulating water tank 14 and the transition tank 15, ensuring continuous desulfurization and denitrification.

[0047] Meanwhile, the alkaline solution in the alkaline tank 17 can be quantitatively pumped into the transition tank 15 by the alkali pump 16. The solution, which is circulating between the desulfurization tower 11, the clear water pool 13, the circulating water tank 14 and the transition tank 15, carries the alkaline solution into the circulating water tank 14, where it waits to mix with the clear water in the clear water pool 13 and participate in the next operation.

[0048] Example 2:

[0049] Based on Example 1, this example describes the internal structure of the circulating water tank 14, such as... Figure 1 and Figure 4 As shown, the internal assembly of the circulating water tank 14 has two cross-sectional partition plates 23. The vertical partition plate 23 has a third outlet 24 at the top and a first outlet 25 at the bottom. The horizontal partition plate 23 has a second outlet 26 on one side.

[0050] A first anti-backflow component 27 is provided on both sides of the bottom inner wall of the circulating water tank 14 and at the top of one side of the horizontally arranged partition plate 23. The first anti-backflow component 27 includes a first collection hopper 2702, and a guide pyramid 2701 is provided at the bottom of the first collection hopper 2702. A second anti-backflow component 28 is provided at the top of the other side of the partition plate 23. The second anti-backflow component 28 includes a second collection hopper 2801, and a guide pyramid tube 2802 is provided at the bottom of the second collection hopper 2801.

[0051] Water and alkaline solution flow from the inside of the first outlet 25 to the inside of the second outlet 26 and out from the inside of the third outlet 24, waiting to enter the inside of the clear water pool 13 to mix with the clear water, and are pumped into the inside of the desulfurization tower 11 by multiple water pumps 12 for desulfurization and denitrification.

[0052] Secondly, by attaching and fixing the two sides of the first collecting hopper 2702 to the surface of the vertical partition plate 23 and the side wall of the circulating water tank 14 respectively, and fixing the guide pyramid 2701 to the bottom inner wall of the circulating water tank 14 or the top surface of the horizontal partition plate 23, when the sediment passes through the interior of the first outlet 25, the second outlet 26 and the third outlet 24 in sequence with the solution, the sediment is deposited to the bottom by gravity. With the guidance of the first collecting hopper 2702 and the guide pyramid 2701, the sediment can be prevented from surging to the top with the liquid.

[0053] Meanwhile, by assembling and fixing the two sides of the second collection hopper 2801 to the surface of the vertical partition plate 23 and the side wall of the circulating water tank 14 respectively, and fixing the guide truncated tube 2802 to the top inner wall of the horizontal third outlet 24, and covering the second outlet 26, the solution carrying the sediment through the interior of the second outlet 26 and through the interior of the guide truncated tube 2802 is not affected. The sediment can be collected on the top of the horizontal partition plate 23 with the help of the guidance of the second collection hopper 2801 and the guide truncated tube 2802.

[0054] The above design divides the interior of the circulating water tank 14 into four areas using two intersecting partition plates 23. When the mixture of water and solution carries the precipitate back from the bottom of the desulfurization tower 11 to the interior of the transition tank 15, it flows into the interior of the circulating water tank 14 along with the alkaline solution and water. The precipitate and water flow through the interior of the first outlet 25, the second outlet 26 and the third outlet 24 one after another. The precipitate settles to the bottom due to gravity. With the guidance of the first collection hopper 2702 and the guide pyramid 2701, the second collection hopper 2801 and the guide frustum tube 2802, the precipitate can be prevented from surging to the top with the liquid, ensuring that the precipitate is collected inside the circulating water tank 14.

[0055] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A boiler dust removal, desulfurization, and denitrification system, characterized in that, include: Dust and sulfur removal device (10); The desulfurization tower (11) is located on one side of the bottom of the dust collector and desulfurizer (10), and its top is connected to one side of the top of the dust collector and desulfurizer (10) through a pipe; Multiple water pumps (12) are connected to one side of the top of the dust collector and desulfurizer (10) via multiple pipes. The inlet of the multiple water pumps (12) is connected to the same clear water tank (13) via pipes. The clear water tank (13) is connected to a circulating water tank (14) via pipes. The bottom of the circulating water tank (14) is connected to a transition tank (15) via pipes. The bottom of the transition tank (15) is connected to an alkali pump (16) via pipes. The inlet of the alkali pump (16) is connected to an alkali tank (17) via pipes. The top of the dust collector and desulfurizer (10) is connected to a Z-shaped exhaust pipe (18), and one end of the exhaust pipe (18) is connected to a chimney (9). The bottom of the desulfurization tower (11) and the transition tank (15) are connected by a pipeline.

2. The boiler dust removal, desulfurization, and denitrification system as described in claim 1, characterized in that: A secondary heat exchange assembly (8) is connected to one side of the bottom of the desulfurization tower (11) via a pipe. An induced draft fan (7) is connected to one side of the secondary heat exchange assembly (8) via a pipe. A dust collector (6) is connected to the air inlet of the induced draft fan (7) via a pipe. A coal dust conveyor (5) is assembled and connected to the bottom of the dust collector (6). A primary heat exchange assembly (4) is connected to the top of the dust collector (6) away from the induced draft fan (7). A boiler (1) is connected to the top of one side of the primary heat exchange assembly (4).

3. The boiler dust removal, desulfurization, and denitrification system as described in claim 2, characterized in that: The bottom of the boiler (1) is connected to multiple air inlet pipes (2), and the bottom of the multiple air inlet pipes (2) is integrally formed into a main pipe, and a blower (3) is assembled and connected through the main pipe.

4. The boiler dust removal, desulfurization, and denitrification system as described in claim 2, characterized in that: The primary heat exchange assembly (4) includes two heat exchangers (402), each of which is equipped with a heat exchange tube (401). A transfer pipe (403) is connected between the bottoms of the two heat exchangers (402). The boiler (1) and the dust collector (6) are connected by a pipe to form a direct connection channel, and a valve is assembled and connected on the direct connection channel. Both ends of the primary heat exchange component (4) are connected to the direct connection channel. The secondary heat exchange component (8) consists of a heat exchanger (402) configured with heat exchange tubes (401). The purified water flows through the inside of the heat exchange tubes (401) and exchanges heat with the air inside the heat exchanger (402).

5. The boiler dust removal, desulfurization, and denitrification system as described in claim 1, characterized in that: The exhaust pipe (18) is fitted with a primary dust and sulfur discharge port (19) at the outer corner of the top, and a first guide plate (20) is fitted with the inner wall of the exhaust pipe (18). The primary dust and sulfur discharge port (19) and the first guide plate (20) are both inclined from top to bottom, and the top surface of the first guide plate (20) is in contact with the bottom surface of the primary dust and sulfur discharge port (19).

6. The boiler dust removal, desulfurization, and denitrification system as described in claim 1, characterized in that: The bottom of the exhaust pipe (18) is assembled with two secondary dust and sulfur discharge ports (21), and the bottom inner wall of the exhaust pipe (18) is assembled with two second guide plates (22). The two second guide plates (22) are both in an inclined state and are arranged in parallel. The orientation of the two second guide plates (22) is opposite to the direction of air flow in the exhaust pipe (18).

7. The boiler dust removal, desulfurization, and denitrification system as described in claim 1, characterized in that: The circulating water tank (14) is internally assembled with two cross-sectional partition plates (23). The vertically arranged partition plate (23) has a third outlet (24) at the top and a first outlet (25) at the bottom. The horizontally arranged partition plate (23) has a second outlet (26) inside one side. Water flows from the inside of the first outlet (25) to the inside of the second outlet (26) and flows out from the inside of the third outlet (24).

8. The boiler dust removal, desulfurization, and denitrification system as described in claim 7, characterized in that: The bottom inner wall of the circulating water tank (14) is provided with a first anti-backflow component (27) on both sides and the top of one side of the horizontally arranged partition plate (23). The first anti-backflow component (27) includes a first collection hopper (2702), and a guide pyramid (2701) is provided at the bottom of the first collection hopper (2702). A second anti-backflow assembly (28) is provided on the top of the other side of the partition plate (23). The second anti-backflow assembly (28) includes a second collection hopper (2801), and a guide truncated tube (2802) is provided at the bottom of the second collection hopper (2801). The first collection hopper (2702) is fixed to the surface of the vertical partition plate (23) and the side wall of the circulating water tank (14) on both sides respectively, and the guide pyramid (2701) is fixed to the bottom inner wall of the circulating water tank (14) or the top surface of the horizontal partition plate (23). The second collection hopper (2801) is fixed to the surface of the vertical partition plate (23) and the side wall of the circulating water tank (14) on both sides respectively. The guide truncated tube (2802) is fixed to the top inner wall of the third horizontal outlet (24) and covers the second outlet (26).

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