A boiler with flue gas treatment function

Abstract

This application discloses a boiler with flue gas treatment function, including a boiler, a flue gas outlet, a flue gas conveying fan, a flue gas conveying pipeline, a flue gas cooling structure, and a flue gas purification structure. The flue gas cooling structure and the flue gas purification structure are connected. This application has a flue gas cooling structure and a flue gas purification structure, which can conveniently cool and purify the flue gas generated by the boiler, and can recover the waste heat of the flue gas. The waste heat of the flue gas can be used to preheat water, achieving the effect of waste heat recovery. Furthermore, the flue gas conveying pipeline of this application has good performance and is not prone to blockage. Through the cooperation of the flue gas cooling structure and the flue gas purification structure, the cooled flue gas can be further purified, allowing for thorough and uniform purification of the flue gas. The application has good performance and is suitable for widespread application.

Description

Technical Field

[0001] This application relates to the field of power plant boilers, and in particular to a boiler with flue gas treatment function. 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. The original meaning of "boiler" refers to a water-filled container heated over a fire, while "furnace" refers to the place where fuel is burned. A boiler consists of two main parts: the boiler and the furnace. During operation, a boiler produces flue gas, which needs to be purified.

[0003] The existing patent document "Utility Model CN205340540U Boiler Flue Gas Processor" discloses a flue gas processor. Although this flue gas processor can treat boiler flue gas, it uses fixed spray heads to spray the flue gas during operation. The fixed spray heads cannot fully spray the reaction liquid into the entire spray tower, which easily creates spray dead zones. This can easily lead to insufficient purification. In addition, the high-temperature flue gas needs to be cooled before treatment, and the waste heat of the flue gas is not fully utilized. When transporting the flue gas, corresponding pipes are used. Dust will remain in the pipes after long-term transport of the flue gas, which can easily cause pipe blockage over time.

[0004] In other words, existing technologies have the following technical problems: ordinary boilers and boiler flue gas processors are prone to insufficient purification, and the waste heat of the flue gas is not fully utilized. When transporting flue gas through pipelines, dust accumulates in the pipelines over long periods, easily leading to blockages. Therefore, to address these problems, a boiler with flue gas treatment capabilities is proposed. Summary of the Invention

[0005] This embodiment provides a boiler with flue gas treatment function to solve the problems of insufficient purification, insufficient utilization of waste heat of flue gas, and easy blockage of flue gas pipelines in the prior art.

[0006] According to one aspect of this application, a boiler with flue gas treatment function is provided, including a boiler, a flue gas outlet, a flue gas conveying fan, a flue gas conveying pipeline, a flue gas cooling structure, and a flue gas purification structure.

[0007] A flue gas outlet is provided at the top of the boiler. A flue gas conveying fan is fixedly installed on the upper surface of the boiler. The input end of the flue gas conveying fan is fixedly connected to the flue gas outlet. One end of the flue gas conveying pipe is connected to the output end of the flue gas conveying fan. One end of the flue gas conveying pipe is connected to the flue gas cooling structure. The flue gas cooling structure is connected to the flue gas purification structure.

[0008] Furthermore, the flue gas conveying pipeline includes a flue gas conveying pipe, fixed supports, rotating shafts, rotating blades, support plates, and cleaning wires. Several fixed supports are fixedly connected to the inner cavity of the flue gas conveying pipeline, and rotating shafts are rotatably connected to the center of each of the fixed supports.

[0009] Furthermore, a rotating blade is fixedly provided at the front end of the rotating shaft, and a support plate is fixedly connected at the rear end of the rotating shaft.

[0010] Furthermore, cleaning wires are fixedly connected to both ends of the support plate. The cleaning wires are L-shaped and contact the inner wall of the smoke conveying pipe.

[0011] Furthermore, the flue gas cooling structure includes a flue gas cooling chamber, a flue gas inlet, a flue gas conveying bend, a flue gas outlet, a heat-conducting metal plate, a cold water inlet pipe, and a water outlet pipe. The flue gas inlet is fixedly installed at the top of the flue gas cooling chamber, and one end of the flue gas inlet is fixedly connected to the flue gas conveying pipe. The flue gas conveying bend is fixedly connected at the bottom of the flue gas inlet and is located inside the flue gas cooling chamber. The flue gas outlet is fixedly installed on the bottom side wall of the flue gas cooling chamber, and one end of the flue gas outlet is fixedly connected to one end of the flue gas conveying bend. The flue gas conveying bend is coiled.

[0012] Furthermore, a heat-conducting metal plate is fixedly installed on the outer surface of the flue gas conveying bend. Several heat-conducting metal plates are provided, and all of them are fixed on the outer surface of the flue gas conveying bend. Both the flue gas conveying bend and the heat-conducting metal plates are made of brass.

[0013] Furthermore, a cold water inlet pipe is fixedly installed at the top of one side wall of the flue gas cooling chamber, and a water outlet pipe is fixedly installed at the bottom of the other side wall of the flue gas cooling chamber, with one end of the water outlet pipe connected to the water inlet of the boiler.

[0014] Furthermore, the flue gas purification structure includes a purification tower body, a flue gas inlet pipe, a clean gas outlet, a fixed base, a rotating seat, a connecting seat, fixed blades, a support rod, a tee, a connecting pipe, a spray nozzle, a first connector, a fixed pipe, a second connector, a circulation pump, a first circulation pipe, a second circulation pipe, a pH detector, a replenishment pipe, and a flue gas nozzle. A clean gas outlet is fixedly installed at the top of the purification tower body, and a flue gas inlet pipe is fixedly connected to the inner wall of the bottom cavity of the purification tower body. One end of the flue gas inlet pipe is connected to one end of the flue gas outlet. A flue gas nozzle is installed at the other end of the flue gas inlet pipe. A fixed base is fixedly installed on the bottom wall of the inner cavity of the purification tower. A rotating seat is rotatably connected to the fixed base. A connecting seat is fixedly connected to the upper surface of the rotating seat. A support rod is fixedly installed on the upper surface of the connecting seat. Four fixed blades are fixedly installed on the arc-shaped surface of the connecting seat. The bottom inner cavity of the purification tower is filled with sodium hydroxide solution.

[0015] Furthermore, the outer surface of the top tee of the support rod is fixedly connected, and connecting pipes are connected to both the left and right ends of the tee. Several spray nozzles are installed at the connecting pipes. A first connector is provided at the upper end of the tee, and a second connector is provided at one end of the fixed pipe. The second connector and the first connector are rotatably connected.

[0016] Furthermore, the input end of the circulation pump is connected to one end of the first circulation pipe, the other end of the first circulation pipe extends to the bottom of the inner cavity of the purification tower and is fixedly connected to the purification tower. The output end of the circulation pump is fixedly connected to one end of the second circulation pipe, the other end of the second circulation pipe is connected to the fixed pipe, and a pH detector is fixedly installed at the second circulation pipe.

[0017] Through the above embodiments of this application, the flue gas cooling structure and flue gas purification structure can conveniently cool and purify the flue gas generated by the boiler, and recover the waste heat of the flue gas. The high temperature of the flue gas can be fully utilized, allowing for sufficient heat exchange with cold water, resulting in better recovery of the waste heat. This preheats the cold water, and the heated water is then transported to the boiler through the outlet pipe, thus achieving energy savings. Furthermore, the flue gas pipeline of this application performs well, and blockages are less likely to occur. Through the combination of the flue gas cooling structure and the flue gas purification structure, the cooled flue gas can be further purified, ensuring thorough and uniform purification. This results in good performance and is suitable for widespread application. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of one embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the internal structure of one embodiment of this application;

[0021] Figure 3 This is a cross-sectional internal structure diagram of a flue gas conveying pipeline according to an embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the internal structure of a flue gas cooling structure according to an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the connection structure of a heat-conducting metal plate according to an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of the internal structure of a flue gas purification structure according to an embodiment of this application;

[0025] Figure 7 This is a schematic diagram of the internal structure of a fixed base according to an embodiment of this application;

[0026] Figure 8 This is a top view of a fixed blade according to an embodiment of this application;

[0027] Figure 9 This is a schematic diagram of the connection structure of the first connector according to an embodiment of this application;

[0028] Figure 10 This is a top view of the clean air outlet according to one embodiment of this application.

[0029] In the diagram: 1. Boiler; 2. Flue gas outlet; 3. Flue gas conveying fan; 4. Flue gas conveying pipeline; 5. Flue gas cooling structure; 6. Flue gas purification structure; 7. Flue gas conveying pipeline; 8. Fixed support; 9. Rotating shaft; 10. Rotating blade; 11. Support plate; 12. Cleaning wire; 13. Flue gas cooling chamber; 14. Flue gas inlet; 15. Flue gas conveying bend; 16. Flue gas outlet; 17. Heat-conducting metal plate; 18. Cold water inlet pipeline; 19. Water outlet pipeline; 20. 21. Purification tower body; 22. Flue gas inlet pipe; 23. Clean gas outlet; 24. Fixed base; 25. Rotating seat; 26. Connecting seat; 27. Fixed blade; 28. Support rod; 29. ​​T-junction; 30. Connecting pipe; 31. Spray nozzle; 32. First connector; 33. Fixed pipe; 34. Second connector; 35. Circulation pump; 36. First circulation pipe; 37. Second circulation pipe; 38. pH detector; 39. Liquid replenishment pipe; 30. Flue gas nozzle. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0033] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0034] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0035] Please see Figure 1-2 As shown, a boiler with flue gas treatment function includes a boiler 1, a flue gas outlet 2, a flue gas conveying fan 3, a flue gas conveying pipeline 4, a flue gas cooling structure 5, and a flue gas purification structure 6.

[0036] A flue gas outlet 2 is provided at the top of the boiler 1. A flue gas conveying fan 3 is fixedly installed on the upper surface of the boiler 1. The input end of the flue gas conveying fan 3 is fixedly connected to the flue gas outlet 2. One end of the flue gas conveying fan 3 is connected to the output end of the flue gas conveying fan 3. One end of the flue gas conveying fan 4 is connected to the flue gas cooling structure 5. The flue gas cooling structure 5 is connected to the flue gas purification structure 6. This application has a flue gas cooling structure 5 and a flue gas purification structure 6. The flue gas cooling structure 5 and the flue gas purification structure 6 can conveniently cool and purify the flue gas generated by the boiler 1, and can recover the waste heat of the flue gas. The waste heat of the flue gas can be used to preheat water, achieving the effect of waste heat recovery. In addition, the flue gas conveying pipe of this application has good performance and is not prone to blockage. Through the cooperation of the flue gas cooling structure 5 and the flue gas purification structure 6, the cooled flue gas can be further purified, so that the flue gas can be fully and evenly purified. The performance is good and it is suitable for promotion.

[0037] For specific technical solutions, please refer to Figure 3As shown, the flue gas conveying pipe 4 includes a flue gas conveying pipe 7, fixed supports 8, rotating shafts 9, rotating blades 10, support plates 11, and cleaning wires 12. Several fixed supports 8 are fixedly connected to the inner cavity of the flue gas conveying pipe 4, and rotating shafts 9 are rotatably connected to the center of each of the fixed supports 8. Rotating blades 10 are fixedly installed at the front end of the rotating shaft 9, and support plates 11 are fixedly connected to the rear end of the rotating shaft 9. Cleaning wires 12 are fixedly connected to both ends of the support plates 11. The cleaning wires 12 are L-shaped and contact the inner wall of the flue gas conveying pipe 7. This application utilizes the operation of the flue gas conveying fan 3 to convey the flue gas generated by the boiler 1. During flue gas conveying, the flue gas moves through the flue gas conveying pipe 7. When the flue gas moves within the inner cavity of the flue gas conveying pipe 7, particulate matter inside the flue gas will be discharged... The phenomenon of particles adhering to the inner wall of the flue gas duct 7 is addressed by the following: When the flue gas is transported, the flow of the flue gas drives the rotating blade 10 to rotate, which in turn drives the rotating shaft 9 to rotate. The rotation of the rotating shaft 9 drives the support plate 11 to rotate, which in turn drives the cleaning wire 12 to rotate. The rotation of the cleaning wire 12 scrapes the inner wall of the flue gas duct 7, thereby removing fine particles from the inner wall and reducing the accumulation of particles on the inner wall of the flue gas duct 7. This reduces the occurrence of blockages. Furthermore, the cleaning wire 12 automatically scrapes and cleans the inner wall of the flue gas duct 7 during flue gas flow. Combined with the operation of the flue gas conveying fan 3 to transport the flue gas, it can perform self-cleaning during flue gas transport, resulting in good performance.

[0038] As a further technical solution, see [link / reference] Figure 4-5 As shown, the flue gas cooling structure 5 includes a flue gas cooling chamber 13, a flue gas inlet 14, a flue gas conveying bend 15, a flue gas outlet 16, a heat-conducting metal plate 17, a cold water inlet pipe 18, and a water outlet pipe 19. The flue gas inlet 14 is fixedly installed at the top of the flue gas cooling chamber 13. One end of the flue gas inlet 14 is fixedly connected to the flue gas conveying pipe 7. The flue gas conveying bend 15 is fixedly connected at the bottom of the flue gas inlet 14. The flue gas conveying bend 15 is installed in the inner cavity of the flue gas cooling chamber 13. The flue gas outlet 16 is fixedly installed on the bottom side wall of the flue gas cooling chamber 13. One end of the flue gas outlet 16 is fixedly connected to one end of the flue gas conveying bend 15. The flue gas conveying bend 15 is coiled.

[0039] A heat-conducting metal plate 17 is fixedly installed on the outer surface of the flue gas conveying bend 15. Several heat-conducting metal plates 17 are provided, and several heat-conducting metal plates 17 are fixed on the outer surface of the flue gas conveying bend 15. Both the flue gas conveying bend 15 and the heat-conducting metal plate 17 are made of brass.

[0040] A cold water inlet pipe 18 is fixedly installed at the top of one side wall of the flue gas cooling chamber 13, and a water outlet pipe 19 is fixedly installed at the bottom of the other side wall of the flue gas cooling chamber 13. One end of the water outlet pipe 19 is connected to the water inlet of the boiler 1. High-temperature flue gas is conveyed into the flue gas inlet 14 and then enters the inner cavity of the flue gas conveying bend 15. The flue gas conveying bend 15 causes the flue gas to move up and down, extending the travel distance of the high-temperature flue gas and allowing the high-temperature gas to remain in the inner cavity of the flue gas conveying bend 15 for a longer period of time. Cold water enters the inner cavity of the flue gas cooling chamber 13 through the cold water inlet pipe 18 and exchanges heat with the flue gas conveying bend 15. The high-temperature flue gas conveying bend 15 heats the cold water, and the high-temperature flue gas moves within the flue gas conveying bend 15, continuously cooling down. The heat-conducting metal plate 17, installed within the bend, conducts heat, allowing the temperature of the high-temperature flue gas conveying bend 15 to be transferred to the heat-conducting metal plate 17. The cold water contacts the heat-conducting metal plate 17, heating up, while the heat-conducting metal plate 17 cools down. Through the combined action of the flue gas conveying bend 15 and the heat-conducting metal plate 17, the high temperature of the flue gas is fully utilized, allowing for sufficient heat exchange with the cold water. This facilitates better recovery of the flue gas's waste heat and preheats the cold water. The heated hot water is then transported to the boiler 1 through the outlet pipe 19, thus achieving energy-saving effects.

[0041] For specific technical solutions, please refer to Figure 6-10As shown; the flue gas purification structure 6 includes a purification tower body 20, a flue gas input pipe 21, a clean gas outlet 22, a fixed base 23, a rotating seat 24, a connecting seat 25, a fixed blade 26, a support rod 27, a tee 28, a connecting pipe 29, a spray nozzle 30, a first connector 31, a fixed pipe 32, a second connector 33, a circulation pump 34, a first circulation pipe 35, a second circulation pipe 36, a pH detector 37, a replenishment pipe 38, and a flue gas nozzle 39. A clean gas outlet 22 is fixedly installed at the top of the purification tower body 20. A flue gas input pipe 21 is fixedly connected to the inner wall of the bottom cavity of the purification tower body 20. One end of the flue gas input pipe 21 is fixedly connected to one end of the flue gas outlet 16, and a flue gas nozzle 39 is installed at the other end of the flue gas input pipe 21. A fixed base 23 is fixedly installed on the bottom wall of the inner cavity of the purification tower body 20. A rotating seat 24 is rotatably connected to seat 23. A connecting seat 25 is fixedly connected to the upper surface of the rotating seat 24. A support rod 27 is fixedly installed on the upper surface of the connecting seat 25. Fixed blades 26 are fixedly installed on the arc-shaped surface of the connecting seat 25. There are four fixed blades 26 in total, which are equidistantly fixed on the arc-shaped surface of the connecting seat 25. The bottom cavity of the purification tower 20 is filled with sodium hydroxide solution. The cooled flue gas is transported to the cavity of the purification tower 20 through the flue gas input pipe 21. The flue gas directly enters the sodium hydroxide solution and reacts with it. The flue gas is also sprayed into the cavity of the purification tower 20 through the flue gas nozzle 39. The sprayed flue gas will drive the fixed blades 26 to rotate. The rotation of the fixed blades 26 drives the connecting seat 25 to rotate. The rotation of the connecting seat 25 drives the support rod 27 to rotate.

[0042] The outer surface of the top tee 28 of the support rod 27 is fixedly connected. Both ends of the tee 28 are connected to connecting pipes 29. Several spray nozzles 30 are installed at the connecting pipes 29. A first connector 31 is provided at the upper end of the tee 28. A second connector 33 is provided at one end of the fixed pipe 32. The second connector 33 is rotatably connected to the first connector 31.

[0043] The input end of the circulating pump 34 is connected to one end of a first circulating pipe 35. The other end of the first circulating pipe 35 extends to the bottom of the inner cavity of the purification tower 20 and is fixedly connected to the purification tower 20. The output end of the circulating pump 34 is fixedly connected to one end of a second circulating pipe 36. The other end of the second circulating pipe 36 is connected to a fixed pipe 32. A pH detector 37 is fixedly installed at the second circulating pipe 36. Through the operation of the circulating pump 34, the sodium hydroxide solution in the inner cavity of the purification tower 20 can be transported to the inner cavity of the connecting pipe 29. The sodium hydroxide solution is sprayed out through the spray nozzle 30. The sprayed sodium hydroxide solution moves downward and comes into contact with the upward-moving flue gas for further reaction and support. The rotation of rod 27 drives the connecting pipe 29 to rotate, thereby rotating and spraying sodium hydroxide solution. This ensures that the sodium hydroxide solution is fully sprayed into the inner cavity of the purification tower 20. Compared with the traditional fixed spraying method, the rotating spraying method of this application can fully and evenly spray the sodium hydroxide solution into the inner cavity of the purification tower 20, reducing spray dead zones and allowing the sodium hydroxide solution to fully react with the flue gas, resulting in a better purification effect. The purified flue gas is output through the clean gas outlet 22. Furthermore, the pH detector 37 can measure the pH value of the delivered solution. Based on the measured pH value, the staff can replenish the inner cavity of the purification tower 20 with new sodium hydroxide solution, making it more flexible and convenient to use.

[0044] The advantages of this application are:

[0045] 1. This application has a reasonable structure and is easy to use. This application has a flue gas cooling structure and a flue gas purification structure. Through the flue gas cooling structure and the flue gas purification structure, the flue gas generated by the boiler can be cooled and purified in a relatively convenient way. The waste heat of the flue gas can also be recovered. The waste heat of the flue gas can be used to preheat water, thereby achieving the effect of recovering waste heat.

[0046] 2. The flue gas duct of this application has good performance and is not prone to blockage. Through the combination of flue gas cooling structure and flue gas purification structure, the cooled flue gas can be further purified, which can make the flue gas fully and evenly purified. The performance is good and it is suitable for promotion.

[0047] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this application does not involve any improvement to the software and methods.

[0048] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A boiler with flue gas treatment function, characterized in that: It includes a boiler (1), a flue gas outlet (2), a flue gas conveying fan (3), a flue gas conveying pipeline (4), a flue gas cooling structure (5), and a flue gas purification structure (6); A flue gas outlet (2) is provided at the top of the boiler (1). A flue gas conveying fan (3) is fixedly installed on the upper surface of the boiler (1). The input end of the flue gas conveying fan (3) is fixedly connected to the flue gas outlet (2). One end of a flue gas conveying pipe (4) is connected to the output end of the flue gas conveying fan (3). One end of the flue gas conveying pipe (4) is connected to a flue gas cooling structure (5). The flue gas cooling structure (5) is connected to a flue gas purification structure (6). The flue gas conveying pipe (4) includes a flue gas conveying pipe (7), a fixed support (8), a rotating shaft (9), a rotating blade (10), a support plate (11), and a cleaning wire (12). Several fixed supports (8) are fixedly connected in the inner cavity of the flue gas conveying pipe (4), and a rotating shaft (9) is rotatably connected at the center of each of the several fixed supports (8). The flue gas cooling structure (5) includes a flue gas cooling chamber (13), a flue gas inlet (14), a flue gas conveying bend (15), a flue gas outlet (16), a heat-conducting metal plate (17), a cold water inlet pipe (18), and a water outlet pipe (19). The flue gas cooling chamber (13) has a flue gas inlet (14) fixedly installed at the top. One end of the flue gas inlet (14) is fixedly connected to the flue gas conveying pipe (7). The flue gas conveying bend (15) is fixedly connected at the bottom. The flue gas conveying bend (15) is installed in the inner cavity of the flue gas cooling chamber (13). The flue gas outlet (16) is fixedly installed on the bottom side wall of the flue gas cooling chamber (13). One end of the flue gas outlet (16) is fixedly connected to one end of the flue gas conveying bend (15). The flue gas conveying bend (15) is coiled. The flue gas purification structure (6) includes a purification tower body (20), a flue gas inlet pipe (21), a clean gas outlet (22), a fixed base (23), a rotating seat (24), a connecting seat (25), a fixed blade (26), a support rod (27), a tee (28), a connecting pipe (29), a spray nozzle (30), a first connector (31), a fixed pipe (32), a second connector (33), a circulation pump (34), a first circulation pipe (35), a second circulation pipe (36), a pH detector (37), a replenishment pipe (38), and a flue gas nozzle (39). A clean gas outlet (22) is fixedly installed at the top of the purification tower body (20), and a flue gas inlet pipe (21) is fixedly connected to the inner wall of the bottom cavity of the purification tower body (20). One end of the flue (21) is fixedly connected to one end of the flue gas outlet (16). A flue gas nozzle (39) is installed at the other end of the flue gas input pipe (21). A fixed base (23) is fixedly installed at the bottom wall of the inner cavity of the purification tower (20). A rotating seat (24) is rotatably connected to the fixed base (23). A connecting seat (25) is fixedly connected to the upper surface of the rotating seat (24). A support rod (27) is fixedly installed on the upper surface of the connecting seat (25). A fixed blade (26) is fixedly installed on the arc surface of the connecting seat (25). There are four fixed blades (26). The four fixed blades (26) are equidistantly fixed on the arc surface of the connecting seat (25). The bottom inner cavity of the purification tower (20) is filled with sodium hydroxide solution. A rotating blade (10) is fixedly provided at the front end of the rotating shaft (9), and a support plate (11) is fixedly connected at the rear end of the rotating shaft (9). Cleaning wires (12) are fixedly connected to both ends of the support plate (11). The cleaning wires (12) are L-shaped and are in contact with the inner wall of the smoke conveying pipe (7). A heat-conducting metal plate (17) is fixedly installed on the outer surface of the flue gas conveying bend (15). Several heat-conducting metal plates (17) are provided, and several heat-conducting metal plates (17) are fixed on the outer surface of the flue gas conveying bend (15). The flue gas conveying bend (15) and the heat-conducting metal plate (17) are both made of brass.

2. A boiler with flue gas treatment function according to claim 1, characterized in that: A cold water inlet pipe (18) is fixedly installed at the top of one side wall of the flue gas cooling chamber (13), and a water outlet pipe (19) is fixedly installed at the bottom of the other side wall of the flue gas cooling chamber (13). One end of the water outlet pipe (19) is connected to the water inlet of the boiler (1).

3. A boiler with flue gas treatment function according to claim 1, characterized in that: The outer surface of the top tee (28) of the support rod (27) is fixedly connected. Both ends of the tee (28) are connected to connecting pipes (29). Several spray nozzles (30) are installed at the connecting pipes (29). A first connector (31) is provided at the upper end of the tee (28). A second connector (33) is provided at one end of the fixed pipe (32). The second connector (33) is rotatably connected to the first connector (31).

4. A boiler with flue gas treatment function according to claim 1, characterized in that: The input end of the circulation pump (34) is connected to one end of the first circulation pipe (35), and the other end of the first circulation pipe (35) extends to the bottom of the inner cavity of the purification tower (20) and is fixedly connected to the purification tower (20). The output end of the circulation pump (34) is fixedly connected to one end of the second circulation pipe (36), and the other end of the second circulation pipe (36) is connected to the fixed pipe (32). A pH detector (37) is fixedly installed at the second circulation pipe (36).

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