A power plant flue gas dust removal, desulfurization and denitrification integrated device

Abstract

The utility model discloses a power plant flue gas dust removal desulfurization denitration integration device in the field of flue gas treatment device, including casing, bubbling mechanism and circulating mechanism, casing both ends set up respectively and go into the smoke mouth and go out the smoke cavity, go into the smoke mouth is used for the flue gas to go into the casing inside, the smoke cavity includes the smoke outlet and the circulation mouth, the circulation mouth with circulating mechanism is connected, sets up the smoke fan at the smoke outlet, circulating mechanism includes circulating air duct and circulating fan, bubbling mechanism includes bubbler and sprays the pipe, the utility model discloses a setting bubbling mechanism and circulating mechanism, through circulating mechanism will flue gas input casing, and act on the surface of bubbler to produce a large number of absorption liquid foam and bubble to improve the contact area of absorption liquid and flue gas, and absorption liquid is with flue gas in the form of foam and bubble, reduces the use amount of absorption liquid, reduces the cost.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment devices, and in particular to an integrated device for dust removal, desulfurization and denitrification of flue gas in power plants. Background Technology

[0002] Flue gas desulfurization and denitrification technology is a boiler flue gas purification technology applied to the chemical industry that generates nitrogen oxides and sulfur oxides. Nitrogen oxides and sulfur oxides are one of the main sources of air pollution, so the application of this technology has many benefits for environmental air purification.

[0003] Existing desulfurization and denitrification technologies mainly absorb impurities in flue gas by spraying absorbent liquid inside the absorption tower; however, the spray structure has limited atomization effect, so the contact area with the flue gas is also relatively limited, and the amount of liquid consumed during the spraying process is huge; the cost of using the absorbent liquid is also high. Utility Model Content

[0004] The purpose of this utility model is to provide an integrated device for dust removal, desulfurization and denitrification of flue gas in power plants, which is equipped with a bubble generating mechanism and a circulation mechanism to convert the absorbent liquid into absorbent liquid foam and bubbles, thereby increasing the contact area between the absorbent liquid and the flue gas.

[0005] To solve the above technical problems, the following technical solution is adopted:

[0006] This utility model provides an integrated device for dust removal, desulfurization and denitrification of flue gas in power plants, including a shell, a foaming mechanism and a circulation mechanism;

[0007] The housing is provided with a smoke inlet and a smoke outlet at both ends. The smoke inlet is used for smoke to enter the interior of the housing. The smoke outlet includes a smoke exhaust port and a circulation port. The circulation port is connected to the circulation mechanism. A smoke exhaust fan is provided at the smoke exhaust port.

[0008] The circulation mechanism includes a circulation duct and a circulation fan. One end of the circulation duct is connected to the circulation port, and the other end extends into the housing from the side of the housing. The circulation fan is located at the circulation port to discharge the flue gas or air at the circulation port into the housing through the circulation duct.

[0009] The foaming mechanism includes a foamer and a spray pipe. The absorbent liquid is transported to the foamer through the spray pipe. The absorbent liquid forms a liquid film on the surface of the foamer. The liquid film is blown by the flue gas or air entering through the circulating air duct to form absorbent liquid foam and bubbles. The absorbent liquid foam and bubbles are used to adsorb impurities carried in the flue gas.

[0010] Optionally, the aerator includes two parallel guide plates, with an air guide pipe between the two guide plates for the passage of flue gas. The guide plates have a plurality of evenly distributed aerator holes, and the spray pipe is positioned between the two guide plates. The air guide pipe and the guide plates are interference-fitted, allowing for stable fixing via press-fitting, which is more convenient.

[0011] Optionally, one end of the spray pipe extends into the housing and is installed in conjunction with the aerator, while the other end is connected to a water distribution tank via a circulation pump, the water distribution tank containing the absorbent liquid.

[0012] Optionally, a plurality of foaming mechanisms are provided, and the plurality of foaming mechanisms are arranged in a uniformly spaced row along the direction from the smoke inlet to the smoke outlet in the housing.

[0013] Optionally, several spray pipes on several foaming mechanisms are connected to a circulating pump via a manifold. The circulating pump is connected to a water distribution tank via a pipe, and the absorbent liquid in the water distribution tank is pumped to each spray pipe via the circulating pump.

[0014] Optionally, the circulating air duct is provided with several return air pipes, one end of which is connected to the inside of the housing, and the other end of which extends into the housing is located between the two aerators. The circulating air duct is vertically arranged on the circulation port, and is perpendicular to the ground. The circulating air duct allows some liquid to automatically fall back and accumulate at the bottom of the circulating air duct, facilitating recycling and cleaning.

[0015] Optionally, an adsorption net is provided inside the smoke outlet chamber, and a settling tank is provided below the smoke outlet chamber. The adsorption net extends into the settling tank with a tapering structure. The settling tank is used to collect the absorbed liquid after use, and the adsorption net is used to prevent the absorbed liquid from being discharged from the smoke outlet. The adsorption net can stably adhere the absorbed liquid, reducing the possibility of a large amount of absorbed liquid being drawn into the smoke outlet; and it can also ensure the stable reflux of the absorbed liquid.

[0016] Optionally, the sedimentation tank is connected to a return water tank via a return water pipe, and the return water tank is connected to a filter tank, which is used to filter the absorbent liquid.

[0017] Optionally, the housing includes an inner shell and an outer shell, the inner shell being used to mount the bubbler, and the inner shell being installed inside the outer shell.

[0018] Optionally, the inner shell and its internal bubblers are mounted inside the outer shell using lifting rods. One end of the lifting rod is mounted on the top flange of the outer shell, and the smoke inlet is located on the top flange. The other end passes through the upper end face of the inner shell and the bubblers, and is mounted on the lower end face of the inner shell. Lifting rings for hoisting are provided at both ends of the inner shell. The inner shell improves the stability and strength of the bubblers, reducing the noise and structural fatigue caused by the free floating of the bubblers within the outer shell.

[0019] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0020] 1. This utility model sets up a foaming mechanism and a circulation mechanism. The circulation mechanism introduces flue gas into the housing and acts on the surface of the foamer, thereby generating a large amount of absorbent liquid foam and bubbles. This increases the contact area between the absorbent liquid and the flue gas, allowing the absorbent liquid to interact with the flue gas in the form of foam and bubbles, reducing the amount of absorbent liquid used and lowering costs.

[0021] 2. An adsorption net is also provided in the smoke outlet chamber of this utility model to effectively adhere the absorbent liquid, prevent it from being sucked into the smoke outlet in large quantities, ensure that the absorbent liquid is stably returned to the sedimentation tank, reduce absorbent liquid loss, improve absorbent liquid utilization rate, and reduce operating costs. The absorbent liquid in the sedimentation tank enters the return water tank and the filter tank in sequence, and after treatment, it enters the spray pipe again for use, thereby improving the utilization rate of the absorbent liquid. Attached Figure Description

[0022] Figure 1 This is a cross-sectional structural schematic diagram of the device in an embodiment of this utility model;

[0023] Figure 2 This is a schematic diagram of the guide plate structure in an embodiment of this utility model;

[0024] Figure 3 This is a schematic diagram of the connections between various pipes and water tanks in an embodiment of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Outer shell; 2. Smoke inlet; 3. Smoke outlet; 4. Adsorption screen; 5. Smoke outlet; 6. Smoke exhaust fan; 7. Circulation port; 8. Circulation fan; 9. Circulation duct; 10. Return air duct; 11. Sedimentation tank; 12. Return water pipe; 13. Top flange; 14. Lifting rod; 15. Lifting ring; 16. Inner shell; 17. Guide plate; 18. Bubble holes; 19. Air guide pipe; 20. Spray pipe; 21. Manifold; 22. Circulation pump; 23. Proportioning tank; 24. Return water tank; 25. Filter tank. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Example 1

[0030] This embodiment provides an integrated device for dust removal, desulfurization and denitrification of flue gas in power plants, including a shell, a foaming mechanism and a circulation mechanism. The foaming mechanism is installed inside the shell. Flue gas enters from one end of the shell, passes through the foaming mechanism and is discharged from the other end.

[0031] The upper and lower ends of the housing are respectively provided with a smoke inlet 2 and a smoke outlet 3. The smoke inlet 2 is connected to the flue pipe, which is connected to the exhaust device. The flue gas in the exhaust device enters through the flue pipe, passes through the smoke inlet 2, and then enters the housing. The smoke outlet 3 includes an exhaust port 5 and a circulation port 7. The circulation port 7 is connected to the circulation structure, and the exhaust port 5 is connected to the outside.

[0032] The circulation mechanism includes a circulation duct 9 and a circulation fan 8. One end of the circulation duct 9 is connected to the circulation port 7, and the other end extends into the housing from the side of the housing. The circulation fan 8 is located at the circulation port 7. The circulation mechanism transports the flue gas located in the smoke outlet chamber 3 back into the housing.

[0033] The foaming mechanism includes a foamer and a spray pipe 20. The spray pipe 20 delivers the absorbent liquid into the foamer. The absorbent liquid forms a liquid film on the surface of the foamer. Under the action of the flue gas entering through the circulating air duct 9, the liquid film forms a large number of absorbent liquid foams and bubbles. The absorbent liquid foams and bubbles come into contact with the flue gas inside the shell and absorb impurities in the flue gas.

[0034] The surface of the bubbler that forms the liquid film is perpendicular to the side of the outer shell 1. The flue gas blown in from the circulating air duct 9 has kinetic energy under the action of the circulating fan 8 and acts parallel to the surface of the bubbler. The liquid film on the surface forms absorbent foam and bubbles under the blowing of the flue gas.

[0035] In use, first turn on the circulating fan 8 and the spray pipe 20. The spray pipe 20 delivers the absorbent liquid to the bubbler. The absorbent liquid forms a liquid film on the surface of the bubbler. The circulating fan 8 blows outside air into the shell 1. After a large amount of absorbent liquid foam and bubbles are formed inside the shell 1, the smoke inlet 2 is opened. The flue gas enters the shell 1 and comes into contact with the absorbent liquid foam and bubbles. After the impurities in the flue gas are adsorbed, it enters the smoke outlet 3. Part of the flue gas in the smoke outlet 3 enters the shell 1 through the circulation mechanism to blow the liquid film to form absorbent liquid foam and bubbles. The other part is discharged from the smoke outlet 5.

[0036] Example 2

[0037] This embodiment provides an integrated flue gas dust removal, desulfurization, and denitrification device for power plants, based on Embodiment 1. The housing includes an inner shell 16 and an outer shell 1. Several bubblers arranged in a parallel array are installed inside the inner shell 16. One end of a spray pipe 20 passes through the outer shell 1 and the inner shell 16 and is mounted on the bubbler. Each bubbler is equipped with one spray pipe 20. Several spray pipes 20 are connected outside the outer shell 1 via a manifold 21. The manifold 21 is connected to a water distribution tank via a circulation pump 22, and the water distribution tank contains absorbent liquid. The absorbent liquid is pumped into the bubblers by the circulation pump 22.

[0038] like Figure 1 , Figure 2As shown, both the inner shell 16 and the outer shell 1 are cylindrical structures. The outer wall of the inner shell 16 is fitted to the inner wall of the outer shell 16, and several aerators are evenly arranged along the axial direction. A top flange 13 is provided on the top of the outer shell 1, and a smoke inlet 2 is installed in the middle of the top flange 13. A smoke outlet chamber 3 is installed at the bottom of the outer shell 1. A circulation port 7 and a smoke exhaust port 5 are located on both sides of the smoke outlet chamber 3, respectively. A circulating fan 8 is installed on the circulation port 7, and a smoke exhaust fan 6 is installed on the smoke exhaust port 5. An adsorption net 4 is provided inside the smoke outlet chamber 3. The bottom of the smoke outlet chamber 3 is open, and the adsorption net 4 extends from the bottom of the smoke outlet chamber 3. A settling tank 11 is provided below the smoke outlet chamber 3 to collect the absorbed liquid after use.

[0039] like Figure 1 , Figure 3 As shown, the adsorption net 4 has a tapered structure extending into the settling tank 11. After the absorbent comes into contact with the flue gas in the form of foam and bubbles, it adsorbs impurities in the flue gas, then passes through the adsorption net 4 and finally falls into the settling tank 11. A return water pipe 12 is installed at the bottom of the settling tank 11, extending a certain height from the bottom of the settling tank 11. The return water pipe 12 is connected to the return water tank 24, which is then connected to the filter tank 25. The absorbent in the settling tank 11 is discharged into the filter tank 25. The filter tank 25 is connected to the proportioning tank 23. After filtering the impurities in the absorbent, the filter tank 25 discharges the absorbent into the proportioning tank 23.

[0040] The bubbler includes two parallel guide plates 17, each a circular plate structure, tightly installed inside the inner shell 16. Each guide plate 17 has an array of bubble-generating holes 18. A spray pipe 20 is positioned between the two guide plates 17, spraying absorbent liquid between them. The absorbent liquid forms a liquid film on the surface of the guide plates 17 through the bubble-generating holes 18. Several air guide pipes 19 are also positioned between the two guide plates 17 for the passage of flue gas.

[0041] The inner shell 16 and the bubbler inside it are installed inside the outer shell 1 by a lifting rod 14. One end of the lifting rod 14 is installed on the top flange 13 of the outer shell 1, and the other end passes through one end face of the inner shell 16, and then passes through several guide plates 17 of several bubblers in sequence. The other end of the lifting rod 14 is installed on the other end face of the inner shell 16. Lifting rings 15 are installed at the positions of the lifting rod 14 at both ends of the outer shell 1, and the installation is carried out by lifting the rod 14.

[0042] like Figure 2 As shown, a circular guide plate 17 has lifting rods 14 spaced apart near its edge. The guide plate 17 is fixed inside the housing by the lifting rods 14. Several air guide pipes 19 are evenly arranged on the guide plate 17, and several bubble-forming holes 18 are arranged near the air guide pipes 19. The inner diameter of the air guide pipes 19 is larger than the diameter of the bubble-forming holes 18.

[0043] An aerator includes two guide plates 17 and a spray pipe 20 positioned between the two guide plates 17. After the aerator sprays absorbent liquid onto one side of the guide plates 17, the absorbent liquid forms a liquid film on the aerator holes 18 at the other end of the guide plates 17. The flue gas entering through the circulation mechanism blows the liquid film into absorbent liquid foam and bubbles. These foam and bubbles are located between the two aerators. The flue gas between the aerators comes into contact with the absorbent liquid foam and bubbles, adsorbing impurities in the flue gas. The absorbent liquid foam and bubbles gradually gather to form water droplets, which flow downwards through the air guide pipe 19 and then fall onto the adsorption net 4. The adsorption net 4 allows the absorbent liquid to adhere stably, reducing the possibility of a large amount of absorbent liquid being drawn into the exhaust port 5, thus ensuring stable reflux of the absorbent liquid. The absorbent liquid finally falls into the settling tank 11. The settling tank 11 initially separates the absorbent liquid from the impurities, with the denser impurities located at the bottom of the settling tank 11. The absorbent in the settling tank 11 enters the filter tank 25 through the return pipe. After further filtration of impurities in the filter tank 25, it enters the mixing tank 23 for reuse. The circulating pump 22 pumps the absorbent in the mixing tank 23 to the spray pipe 20, spraying it between the two guide plates 17 for use. This forms a recycling of the absorbent, avoiding waste.

[0044] The circulating air duct 9 is connected to the interior of the housing via several return air pipes 10. Several return air pipes 10 are installed on the circulating air duct 9, with one end of each pipe penetrating through the outer shell 1 and the inner shell 16. The outlet of the return air pipe 10 from the inner shell 16 is located between two bubblers. Figure 1 As shown, the device is equipped with four bubblers and four spray pipes 20, and three return air pipes 10. The return air pipes 10 are located between two bubblers and are used to blow the liquid film on the bubble holes 18 on the guide plate 17 to form absorbent foam and bubbles.

[0045] The installation and initial debugging of the device in this embodiment are as follows:

[0046] Site preparation and equipment inspection: Select a site that conforms to the power plant layout plan and has good ventilation, ensuring that the ground in the installation area is flat, firm, and capable of supporting the weight of the equipment. Carefully inspect each component, such as whether the outer casing 1 is deformed or damaged, whether the aerator's guide plate 17 and air guide pipe 19 are intact, whether the spray pipe 20 is blocked or cracked, and whether the settling tank 11, return water pipe 12, and circulating pump 22 of the circulation mechanism are functioning properly. At the same time, check the dimensional accuracy and surface quality of each connecting component, such as flanges, lifting rings 15, and connecting holes, to ensure smooth installation.

[0047] Installation of Outer Casing 1: Hoist outer casing 1 to the designated location, ensuring it is perpendicular to the ground, and secure it firmly using anchor bolts. Install the top flange 13, ensuring a tight connection with the top of outer casing 1 to guarantee sealing performance and prevent flue gas leakage. Install the flue gas inlet 2 in the middle of the top flange 13, ensuring a smooth connection between the flue gas inlet 2 and the flue.

[0048] Aeration Mechanism Installation: Install lifting rings 15 at both ends of the lifting rod 14, and fit the inner shell 16 onto the lifting rod 14, ensuring that the inner shell 16 contacts the inner wall of the outer shell 1 to improve structural stability. Install the aerator inside the outer shell 1 using the lifting rod 14, with the top of the lifting rod 14 fixed to the top flange 13. The ring array of lifting rods 14 ensures that the aerator array is evenly and firmly arranged. Install the air guide pipe 19 with its two ends fitted to the connecting holes on the guide plate 17, ensuring the air guide pipe 19 is securely fixed. Arrange the aeration holes 18 on the guide plate 17 and install the spray pipe 20, positioning the end of the spray pipe 20 between the two sets of guide plates 17 for each aerator. Connect the spray pipe 20 to the circulation pump 22 via the manifold 21, and then connect the circulation pump 22 to the water distribution tank to ensure unobstructed absorption liquid circulation.

[0049] Installation of the circulation mechanism: Install a settling tank 11 below the smoke outlet chamber 3, ensuring the settling tank 11 is stable and does not tilt or shift. Install a return water pipe 12 inside the settling tank 11, ensuring the end of the return water pipe 12 is higher than the bottom of the settling tank 11 to prevent sediment from clogging the return water pipe 12. Connect the return water pipe 12 to the top of the return water tank 24. The bottom of the return water tank 24 is connected to the filter tank 25 via a water pipe. The filter tank 25 is connected to the water distribution tank. Install a circulation port 7 on the side wall of the smoke outlet chamber 3. Vertically fix a circulation duct 9 on the circulation port 7. Arrange an array of return air pipes 10 on the circulation duct 9. Connect the return air pipes 10 to the inner wall of the outer casing 1 between two adjacent sets of aerators. Fix the adsorption net 4 at the top of the smoke outlet chamber 3 using a connecting ring, so that the bottom of the tapered structure of the adsorption net 4 extends into the settling tank 11.

[0050] Initial commissioning: Inject the absorbent solution mixed with surfactant into the water distribution tank, start the circulation pump 22, and check the circulation of the absorbent solution in the spray pipe 20, aerator, return water pipe 12, etc., to ensure there are no leaks or blockages. Start the circulation fan 8 and observe the airflow in the return air duct 10 to check whether a large amount of absorbent solution foam and bubbles can be formed in the outer casing 1. Start the exhaust fan 6 to simulate flue gas entering the device from the inlet 2 and check the flow of flue gas in the flue and the contact effect with the absorbent solution foam and bubbles. Use the detection equipment to detect the concentration of pollutants in the flue gas discharged from the flue chamber 3, and preliminarily adjust the operating parameters of the circulation pump 22, circulation fan 8, and exhaust fan 6 to achieve the best dust removal, desulfurization, and denitrification effects of the device.

[0051] In use, an alkaline surfactant is first added to the existing absorbent liquid, making the absorbent liquid have a lower pH value than ordinary absorbent liquid, and it can foam, increasing its specific gravity and adhesion effect, resulting in a larger contact area between the foamed liquid and the gas. Then, the absorbent liquid is drawn from the distribution tank by the circulation pump 22 and sprayed through the manifold 21 and various spray pipes 20 onto the surface of the guide plates 17 of each aerator. The absorbent liquid on the surface of the guide plates 17 is then blown by the return air duct 10, generating a large amount of absorbent liquid foam and bubbles. Subsequently, the flue gas enters from the top smoke inlet 2, and... The gas comes into contact with the absorbent foam to complete the denitrification, desulfurization and dust removal of the gas; the adsorbed absorbent liquid flows downward along the air guide pipe 19 of each bubbler under the driving force of the flue gas until it comes into contact with the adsorption net 4 at the bottom, and flows back into the settling tank 11, so that large particles settle. Then, part of the filtered flue gas is directly discharged, while the other part of the flue gas is circulated into the outer shell 1 to continue to generate foam and filter again. At the same time, the liquid with a high surfactant content that floats on the surface of the settling tank 11 returns to the return water tank 24 through the return water pipe 12, and enters the water distribution tank for reuse after being filtered in the filter tank 25.

[0052] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An integrated device for dust removal, desulfurization, and denitrification of flue gas in power plants, characterized in that, Includes the shell, the bubbling mechanism, and the circulation mechanism; The housing is provided with a smoke inlet and a smoke outlet at both ends. The smoke inlet is used for smoke to enter the interior of the housing. The smoke outlet includes a smoke exhaust port and a circulation port. The circulation port is connected to the circulation mechanism. A smoke exhaust fan is provided at the smoke exhaust port. The circulation mechanism includes a circulation duct and a circulation fan. One end of the circulation duct is connected to the circulation port, and the other end extends into the housing from the side of the housing. The circulation fan is located at the circulation port to discharge the flue gas or air at the circulation port into the housing through the circulation duct. The foaming mechanism includes a foamer and a spray pipe. The absorbent liquid is transported to the foamer through the spray pipe. The absorbent liquid forms a liquid film on the surface of the foamer. The liquid film is blown by the flue gas or air entering through the circulating air duct to form absorbent liquid foam and bubbles. The absorbent liquid foam and bubbles are used to adsorb impurities carried in the flue gas.

2. The integrated power plant flue gas dust removal, desulfurization, and denitrification device according to claim 1, characterized in that, The bubbler includes two parallel guide plates, with an air guide pipe between the two guide plates for the passage of the flue gas. The guide plates are provided with a plurality of evenly arranged bubble holes, and the spray pipe is disposed between the two guide plates.

3. The integrated power plant flue gas dust removal, desulfurization, and denitrification device according to claim 1, characterized in that, One end of the spray pipe extends into the housing and is installed in conjunction with the aerator, while the other end is connected to a water distribution tank via a circulation pump. The water distribution tank contains the absorbent liquid.

4. The integrated power plant flue gas dust removal, desulfurization, and denitrification device according to claim 1, characterized in that, The foaming mechanism is provided in several units, and the several foaming mechanisms are arranged in a uniform row at intervals along the direction from the smoke inlet to the smoke outlet in the housing.

5. The integrated power plant flue gas dust removal, desulfurization, and denitrification device according to claim 4, characterized in that, Several spray pipes on several foaming mechanisms are connected to a circulating pump through a manifold. The circulating pump is connected to a water distribution tank through a pipe. The circulating pump pumps the absorbent liquid in the water distribution tank to each spray pipe.

6. The integrated power plant flue gas dust removal, desulfurization, and denitrification device according to claim 4 or 5, characterized in that, The circulating air duct is provided with several return air pipes. One end of the return air pipe is connected to the inside of the housing, and the end of the return air pipe that extends into the housing is located between the two bubblers.

7. The integrated power plant flue gas dust removal, desulfurization, and denitrification device according to claim 1, characterized in that, An adsorption net is provided inside the smoke outlet chamber, and a settling tank is provided below the smoke outlet chamber. The adsorption net extends into the settling tank with a tapering structure. The settling tank is used to receive the absorbent liquid after use, and the adsorption net is used to prevent the absorbent liquid from being discharged from the smoke outlet.

8. The integrated power plant flue gas dust removal, desulfurization, and denitrification device according to claim 7, characterized in that, The sedimentation tank is connected to the return water tank via a return water pipe, and the return water tank is connected to the filter tank, which is used to filter the absorbent liquid.

9. The integrated power plant flue gas dust removal, desulfurization, and denitrification device according to claim 1, characterized in that, The housing includes an inner shell and an outer shell, the inner shell being used to install the bubbler, and the inner shell being installed inside the outer shell.

10. The integrated power plant flue gas dust removal, desulfurization, and denitrification device according to claim 9, characterized in that, The inner shell and the bubbler inside it are installed inside the outer shell by a lifting rod. One end of the lifting rod is installed on the top flange of the outer shell, and the smoke inlet is set on the top flange. The other end passes through the upper end face of the inner shell and the bubbler in sequence, and is installed on the lower end face of the inner shell. Lifting rings for lifting are provided at the two ends of the inner shell.

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