Denitration catalyst stirring device for thermal power plant

Abstract

The invention discloses a thermal power plant denitration catalyst stirring device which comprises a base, a mixing mechanism, an exhaust cylinder and a feeding mechanism, the mixing mechanism comprises a flue gas tank, a fixed cylinder, a conical tank, a rotating cylinder and a rotating cone, and the conical tank is arranged at the top of the fixed cylinder; the rotating cone is arranged at the top of the rotating cylinder, a gap exists between the rotating cone and the conical tank, a gap exists between the exhaust cylinder and the rotating cylinder, the second end of the exhaust cylinder penetrates out of the conical tank, the fixing rod penetrates through the interior of the exhaust cylinder and is fixedly connected with the rotating cylinder, and the fixing rod is provided with a plurality of catalytic material discs used for supporting catalysts; the multiple sets of spray heads are arranged in the conical tank and used for spraying and feeding materials to the rotating cone, the multiple annular pipes are arranged on the outer wall of the conical tank and connected with the spray heads, and the feeding pipe communicates with the multiple annular pipes. The thermal power plant denitration catalyst stirring device provided by the invention has the advantages of high catalytic efficiency and good mixing effect.

Description

Technical Field

[0001] This invention relates to the field of flue gas purification technology, and in particular to a stirring device for denitrification catalyst in thermal power plants. Background Technology

[0002] Domestic thermal power plants typically use coal as fuel to generate electricity. The flue gas formed after the coal and pulverized coal are burned will eventually be released into the atmosphere. The flue gas contains a large amount of nitrogen oxides, which need to be treated for denitrification to control pollution.

[0003] Currently, the mainstream denitrification methods in the market include SCR (Selective Catalytic Reduction) and SNCR (Single-Layer Catalytic Reduction). SCR catalysts are mainly available in honeycomb, plate, and corrugated plate types. The catalyst is fixed in the denitrification reactor to undergo a catalytic reaction. The effective surface area of ​​the catalyst determines the catalytic reaction efficiency; however, a relatively small effective specific surface area and large volume result in low efficiency. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art. To this end, embodiments of the present invention provide a stirring device for a denitrification catalyst in a thermal power plant, which has the advantages of high catalytic efficiency and good mixing effect.

[0005] According to an embodiment of the present invention, a denitrification catalyst stirring device for thermal power plants includes a base, a mixing mechanism, an exhaust stack, and a feeding mechanism. A driving component is mounted on the base. The mixing mechanism includes a flue gas tank, a fixed cylinder, a conical tank, a rotating cylinder, and a rotating cone. The fixed cylinder is arranged at the top of the flue gas tank, and an exhaust port is provided on the side of the flue gas tank. The bottom of the flue gas tank is connected to the base via a fixed seat. The top of the fixed seat is pivotally connected to the rotating cylinder. The rotating cylinder is driven by the driving component. The conical tank is arranged at the top of the fixed cylinder, and the rotating cone is... The exhaust pipe is positioned at the top of the rotating cylinder and has a gap with the conical tank. The first end of the exhaust pipe is located inside the rotating cylinder, and there is a gap between the exhaust pipe and the rotating cylinder. The second end of the exhaust pipe extends out of the conical tank. A fixing rod passes through the exhaust pipe and is fixedly connected to the rotating cylinder. Multiple catalyst trays are provided on the fixing rod to support the catalyst. The feeding mechanism includes nozzles, ring pipes, and feed pipes. Multiple sets of nozzles are arranged inside the conical tank to spray and feed the rotating cone. Multiple ring pipes are arranged on the outer wall of the conical tank and connected to the nozzles. The feed pipe is connected to the multiple ring pipes.

[0006] The denitrification catalyst stirring device for thermal power plants according to embodiments of the present invention has the advantages of high catalytic efficiency and good mixing effect. This application has the following advantages: premixing the oxidant with flue gas and rotating the catalyst to contact the flue gas improves the contact efficiency between the flue gas and the catalyst, resulting in high catalytic efficiency.

[0007] In some embodiments, an air supply mechanism is further included, which includes blades, a drive shaft, and a pulley. A plurality of blades are distributed along the circumferential direction of the rotating cylinder and connected to the rotating cylinder. A first end of the drive shaft is connected to the rotating cylinder, and a second end of the drive shaft passes through the fixed base and is connected to the pulley. The pulley is connected to the drive component in a driving transmission.

[0008] In some embodiments, a blower assembly is further included, the blower assembly including a blower tube, a mounting frame and fan blades, the blower tube being connected to the second end of the exhaust pipe, the mounting frame being arranged inside the blower tube, a motor being arranged on the mounting frame, and the output shaft of the motor being drivenly connected to the fan blades.

[0009] In some embodiments, the plurality of nozzles in each group are evenly distributed around the rotating cone, and one annular tube corresponds to the plurality of nozzles in a group, with the area enclosed by the plurality of annular tubes on the horizontal plane increasing sequentially from top to bottom.

[0010] In some embodiments, a plurality of the catalyst discs are arranged at equal intervals along the height direction on the fixing rod.

[0011] In some embodiments, a guide plate is further included, which is spirally wound around the rotating cone to the outer wall of the rotating cylinder.

[0012] In some embodiments, the rotating cone is sleeved on the top of the rotating cylinder, and the rotating cone is movably connected to the rotating cylinder to adjust the gap distance between the rotating cone and the conical tank.

[0013] In some embodiments, a stirring block is also included, wherein a plurality of the stirring blocks are distributed in a ring around the rotating cone on the outer wall of the top of the rotating cone.

[0014] In some embodiments, a plurality of air holes are provided on the side wall of the exhaust pipe, the air holes are evenly distributed along the circumferential direction of the exhaust pipe, and the diameter of the air holes decreases from bottom to top.

[0015] In some embodiments, the bottom of the flue gas canister is provided with a plurality of support legs, the other end of which is connected to the base, and there is a gap between the bottom of the flue gas canister and the base. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of the denitrification catalyst stirring device in a thermal power plant according to an embodiment of the present invention.

[0017] Figure 2 yes Figure 2 A schematic diagram of the cross-sectional structure.

[0018] Figure 3 This is a schematic diagram of the conical tank and feeding mechanism of the denitrification catalyst stirring device in a thermal power plant according to an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the air supply mechanism of the denitrification catalyst stirring device in a thermal power plant according to an embodiment of the present invention.

[0020] Reference numerals: 1. Base; 2. Flue gas canister; 201. Flue gas inlet; 3. Fixed cylinder; 4. Conical canister; 5. Rotating cylinder; 6. Rotating cone; 7. Fixed seat; 8. Exhaust pipe; 9. Fixed rod; 10. Catalytic feed tray; 11. Nozzle; 12. Ring pipe; 13. Feed pipe; 14. Paddle; 15. Pulley; 16. Drive shaft; 17. Blower; 18. Fixed frame; 19. Fan blade; 20. Stirring block; 21. Support leg. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] According to an embodiment of the present invention, a denitrification catalyst stirring device for thermal power plants includes a base 1, a mixing mechanism, an exhaust stack 8, and a feeding mechanism. A driving component is mounted on the base 1. The mixing mechanism includes a flue gas tank 2, a fixed cylinder 3, a conical tank 4, a rotating cylinder 5, and a rotating cone 6. The fixed cylinder 3 is arranged on the top of the flue gas tank 2. An inlet 201 is provided on the side of the flue gas tank 2. The bottom of the flue gas tank 2 is connected to the base 1 via a fixed seat 7. The top of the fixed seat 7 is pivotally connected to the rotating cylinder 5. The rotating cylinder 5 is connected to the driving component. The conical tank 4 is arranged on the top of the fixed cylinder 3. The rotating cone 6 is arranged on... The exhaust pipe 8 is placed at the top of the rotating cylinder 5 and has a gap with the conical tank 4. The first end of the exhaust pipe 8 is located inside the rotating cylinder 5, and there is a gap between the exhaust pipe 8 and the rotating cylinder 5. The second end of the exhaust pipe 8 passes through the conical tank 4. The fixing rod 9 passes through the exhaust pipe 8 and is fixedly connected to the rotating cylinder 5. Multiple catalyst trays 10 are provided on the fixing rod 9 to support the catalyst. The feeding mechanism includes a nozzle 11, a ring pipe 12 and a feed pipe 13. Multiple sets of nozzles 11 are arranged inside the conical tank 4 to spray and feed the material to the rotating cone 6. Multiple ring pipes 12 are arranged on the outer wall of the conical tank 4 and connected to the nozzles 11. The feed pipe 13 is connected to the multiple ring pipes 12.

[0023] The base 1 provides support for the equipment. A drive unit, mounted on the base 1, drives the rotating cylinder 5 to rotate, which in turn rotates the rotating cone 6 and the fixed rod 9. The conical tank 4 and the fixed cylinder 3 are fixed relative to the base 1, allowing for dynamic mixing of the flue gas and oxidant, and dynamic contact between the flue gas and the catalyst. The flue gas tank 2 is a container for collecting and storing the flue gas to be treated. The flue gas inlet 201 is located on the side for easy introduction of high-temperature flue gas generated by the power plant. The flue gas tank 2 is fixedly connected to the base 1 via a fixed seat 7, ensuring stability.

[0024] A fixed cylinder 3 is positioned at the top of the flue gas canister 2 to support the conical canister 4, providing upward space for the flue gas. The fixed cylinder 3, together with the conical canister 4, forms a mixing zone between the oxidant and the flue gas. A rotating cone 6, positioned at the top of the rotating cylinder 5, rotates under the drive of a driving component. The flue gas mixes in the area between the conical canister 4 and the rotating cone 6. The conical structure of the conical canister 4 and the rotating cone 6 helps guide the flow of flue gas, and the gap between them is adjusted according to factors such as the oxidant and the flue gas velocity. The rotation of the rotating cylinder 5 drives the movement of the flue gas, and the gap between the exhaust pipe 8 and the rotating cylinder 5 allows the oxidized flue gas to enter the exhaust pipe 8. Inside the exhaust pipe 8, the flue gas comes into contact with the moving catalyst, increasing the effective surface area of ​​the catalyst and improving catalytic efficiency. Multiple catalyst trays 10 on the fixed rod 9 arrange the catalyst in layers within the exhaust pipe 8, increasing the effective surface area of ​​the catalyst. As the fixed rod 9 rotates, the catalyst trays 10 rotate, facilitating dynamic contact between the catalyst and the flue gas.

[0025] The feeding mechanism sprays material onto the surface of the rotating cone 6 through multiple sets of nozzles 11. The multiple sets of nozzles 11 can form a gradient feeding to fully and evenly spray the area between the rotating cone 6 and the conical tank 4. The ring pipe 12 is connected to the spray to supply material to the nozzles 11, and the feeding pipe 13 feeds material to multiple ring pipes 12 respectively.

[0026] In some embodiments, an air supply mechanism is also included, which includes blades 14, a drive shaft 16 and a pulley 15. Multiple blades 14 are distributed along the circumferential direction of the rotating cylinder 5 and connected to the rotating cylinder 5. The first end of the drive shaft 16 is connected to the rotating cylinder 5, and the second end of the drive shaft 16 passes through the fixed seat 7 and is connected to the pulley 15. The pulley 15 is connected to the drive component for transmission.

[0027] Specifically, the blades 14 generate airflow through rotation, providing power for the flue gas flow. Multiple blades 14 evenly distributed along the circumference of the rotating cylinder 5 can form an airflow. The drive shaft 16 provides power to the rotating cylinder 5, ensuring that the blades 14 rotate synchronously with the rotating cylinder 5, guaranteeing stable and uniform airflow delivery. The drive component, a motor, is effectively transmitted via a pulley 15, and the pulley 15 ensures smoother power transmission, reduces mechanical vibration, and improves the operational stability of the equipment.

[0028] Understandably, the angle between the surface of the blade 14 and the vertical direction allows for better airflow formation. The airflow volume can be adjusted by changing the rotational speed or tilt angle of the blade 14.

[0029] In some embodiments, a blower assembly is also included, which includes a blower duct 17, a mounting frame 18, and a fan blade 19. The blower duct 17 is connected to the second end of the exhaust pipe 8. The mounting frame 18 is arranged inside the blower duct 17, and a motor is arranged on the mounting frame 18. The output shaft of the motor is connected to the fan blade 19 in a transmission manner.

[0030] Specifically, the blower assembly provides negative pressure to accelerate the discharge of flue gas from the exhaust stack 8, ensuring a proper flow path for the flue gas. A mounting bracket 18 is arranged inside the blower duct 17 to support the motor and fan blades 19. The blower duct 17 is connected to the second end of the exhaust stack 8, further discharging the denitrified flue gas from the device. The blower assembly drives the fan blades 19 to rotate via the motor, generating airflow to further propel the flue gas out, ensuring smooth discharge from the device, reducing the residence time of the flue gas within the device, minimizing pressure changes caused by flue gas accumulation, and improving the overall operating efficiency of the denitrification system.

[0031] Optionally, a silencer is installed at the outlet of the blower 17. The silencer includes sound-absorbing material to reduce the noise generated during the blowing process, reduce the impact on the surrounding environment and workers, and improve the environmental performance of the equipment and the comfort of the working environment.

[0032] In some embodiments, multiple nozzles 11 in each group are evenly distributed around the rotating cone 6, and one annular tube 12 corresponds to multiple nozzles 11 in a group. The area enclosed by multiple annular tubes 12 on the horizontal plane increases sequentially from top to bottom.

[0033] Specifically, multiple nozzles 11 in each group are evenly distributed around the rotating cone 6. This design ensures that the catalyst can be sprayed evenly onto the surface of the rotating cone 6. The evenly distributed nozzles 11 enable the oxidant to form a uniform coating on the rotating cone 6, increasing the contact area between the oxidant and the flue gas. One annular pipe 12 corresponds to a group of multiple nozzles 11, and this one-to-one correspondence ensures that each nozzle 11 receives a stable supply of catalyst.

[0034] The area enclosed by multiple ring pipes 12 on the horizontal plane increases sequentially from top to bottom, adapting to the characteristic of flue gas being gathered by the conical canister during its ascent. As the flue gas flows upward, its volume gradually decreases, thus requiring only a smaller spray area to ensure that the catalyst can uniformly cover the entire flue gas flow. By changing the enclosing area of ​​the ring pipes 12, the distance of the flue gas can be better adapted, improving the utilization efficiency of the oxidant.

[0035] In some embodiments, a plurality of catalyst discs 10 are arranged at equal intervals along the height direction on the fixing rod 9.

[0036] Specifically, multiple catalyst discs 10 are arranged at equal intervals along the height direction on the fixed rod 9. This design ensures the uniform distribution of catalyst at different height positions, allowing the catalyst to fully contact the flue gas at different heights and improving denitrification efficiency.

[0037] Optionally, the upper and lower surfaces of the catalytic feed plate 10 are recessed around the fixing rod 9 to increase the catalyst capacity on the catalytic feed plate 10 and the contact area between the catalyst and the flue gas. The increased surface area allows for more thorough contact between the catalyst and the flue gas, improving the efficiency of the denitrification reaction and reducing the emission of unreacted catalyst and harmful gases.

[0038] In some embodiments, a guide plate is also included, which is spirally wound around the outer wall of the rotating cylinder 5 on the rotating cone 6.

[0039] Specifically, the guide vane is spirally wound around the outer wall of the rotating cone 6 and the rotating cylinder 5. This design allows the guide vane to direct the flue gas and oxidant along a spiral path, increasing the contact time and contact area between the flue gas and the oxidant, thereby improving oxidation efficiency. The spiral path can reduce turbulence and eddies in the flue gas, improving mixing. On the other hand, the spiral path prolongs the contact time and contact area between the flue gas and the oxidant, further improving oxidation efficiency.

[0040] In some embodiments, the rotating cone 6 is sleeved on the top of the rotating cylinder 5, and the rotating cone 6 is movably connected to the rotating cylinder 5 to adjust the gap distance between the rotating cone 6 and the conical tank 4.

[0041] Specifically, the rotating cone 6 and the rotating cylinder 5 are connected in a movable manner, such as through threads, slide rails, or other mechanical connections, allowing the rotating cone 6 to move up and down along the axial direction of the rotating cylinder 5. This allows the gap between the rotating cone 6 and the conical tank 4 to be adjusted according to different operating conditions. By adjusting the gap between the rotating cone 6 and the conical tank 4, the distribution of the oxidant and the flow characteristics of the flue gas can be optimized. A smaller gap increases the contact area between the catalyst and the flue gas, improving oxidation efficiency; a larger gap reduces oxidant accumulation, prevents blockage, and ensures stable system operation.

[0042] In some embodiments, the device further includes stirring blocks 20, with a plurality of stirring blocks 20 arranged in a ring around the rotating cone 6 on the outer wall of the top of the rotating cone 6.

[0043] Specifically, multiple stirring blocks 20 are arranged in a ring around the rotating cone 6 on the outer wall of the top of the rotating cone 6. This design allows the stirring blocks 20 to move with the rotation of the rotating cone 6, stirring the oxidant and flue gas, further enhancing the mixing effect. During rotation, the stirring blocks 20 can effectively cut and disperse the flue gas, making the flue gas more evenly dispersed. The stirring blocks 20 can be rectangular blocks extending radially along the rotating cone 6. Optionally, the cross-sectional area of ​​the stirring blocks 20 decreases with increasing distance from the rotating cone 6, helping to maintain cutting and dispersion effects while reducing the weight of the stirring blocks 20.

[0044] In some embodiments, a plurality of air holes are provided on the side wall of the exhaust pipe 8, and the air holes are evenly distributed along the circumferential direction of the exhaust pipe 8, with the diameter of the air holes decreasing from bottom to top.

[0045] Specifically, the air vents are evenly distributed along the circumference of the exhaust stack 8. This ensures that the airflow enters the exhaust stack 8 uniformly from its sidewalls, avoiding excessively strong or weak local airflow and thus improving airflow uniformity. The decreasing orifice diameter from bottom to top takes into account the diffusion characteristics of flue gas during its ascent; as the flue gas flows upward, its volume gradually increases and its pressure gradually decreases. Smaller orifice diameters allow for better control of airflow velocity, ensuring uniform distribution of airflow at different heights and further improving mixing efficiency. On the other hand, the decreasing orifice diameter from bottom to top helps ensure that the pressure at the bottom of the exhaust stack 8 is lower than that at the top, guiding the flue gas from the bottom of the exhaust stack 8 to fully contact the catalyst inside, extending the contact time and improving the catalytic effect.

[0046] Optionally, a baffle is provided on the inner wall of the exhaust pipe 8. The baffle is slidably connected to the inner wall of the exhaust pipe 8. Moving the baffle can change the number and area of ​​the air holes, and adjust the airflow velocity according to the working conditions.

[0047] In some embodiments, the bottom of the flue gas canister 2 is provided with multiple support legs, the other end of which is connected to the base 1, and there is a gap between the bottom of the flue gas canister 2 and the base 1.

[0048] Specifically, the multiple support legs provide balanced support for the flue gas canister 2, reducing the vibration of the flue gas canister 2 caused by rotation. In addition, the support legs create a large gap between the flue gas canister 2 and the base 1, which facilitates equipment installation and maintenance, reduces heat conduction between the flue gas canister 2 and the base 1, protects the base 1 from the effects of high-temperature flue gas, and extends the service life of the base 1.

[0049] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0054] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A stirring device for denitrification catalyst in a thermal power plant, characterized in that, include: A base, on which a driving component is mounted; A mixing mechanism includes a flue gas canister, a fixed cylinder, a conical canister, a rotating cylinder, and a rotating cone. The fixed cylinder is arranged on the top of the flue gas canister, and a flue gas inlet is provided on the side of the flue gas canister. The bottom of the flue gas canister is connected to the base via a fixed seat. The top of the fixed seat is pivotally connected to the rotating cylinder. The rotating cylinder is driven by the driving component. The conical canister is arranged on the top of the fixed cylinder, and the rotating cone is arranged on the top of the rotating cylinder with a gap between it and the conical canister. An exhaust pipe, the first end of which is located inside the rotating cylinder, there is a gap between the exhaust pipe and the rotating cylinder, the second end of which extends out of the conical tank, a fixing rod passes through the exhaust pipe and is fixedly connected to the rotating cylinder, and multiple catalyst trays are provided on the fixing rod to support the catalyst; The feeding mechanism includes nozzles, ring pipes, and a feed pipe. Multiple sets of nozzles are arranged inside the conical tank to spray and feed material onto the rotating cone. Multiple ring pipes are arranged on the outer wall of the conical tank and connected to the nozzles. The feed pipe is connected to the multiple ring pipes.

2. The stirring device for denitrification catalyst in thermal power plants according to claim 1, characterized in that, It also includes an air supply mechanism, which includes blades, a drive shaft and a pulley. Multiple blades are distributed along the circumferential direction of the rotating cylinder and connected to the rotating cylinder. The first end of the drive shaft is connected to the rotating cylinder, and the second end of the drive shaft passes through the fixed base and is connected to the pulley. The pulley is connected to the drive component for transmission.

3. The stirring device for denitrification catalyst in thermal power plants according to claim 1, characterized in that, It also includes a blower assembly, which includes a blower tube, a mounting frame, and fan blades. The blower tube is connected to the second end of the exhaust pipe. The mounting frame is arranged inside the blower tube, and a motor is arranged on the mounting frame. The output shaft of the motor is connected to the fan blades in a drive.

4. The stirring device for denitrification catalyst in thermal power plants according to claim 1, characterized in that, The multiple nozzles in each group are evenly distributed around the rotating cone, and one ring tube corresponds to the multiple nozzles in a group. The area enclosed by the multiple ring tubes on the horizontal plane increases sequentially from top to bottom.

5. The stirring device for denitrification catalyst in thermal power plants according to claim 1, characterized in that, Multiple catalyst discs are arranged at equal intervals along the height direction on the fixed rod.

6. The stirring device for denitrification catalyst in thermal power plants according to claim 1, characterized in that, It also includes a guide plate, which is spirally wound around the outer wall of the rotating cone.

7. The stirring device for denitrification catalyst in thermal power plants according to claim 1, characterized in that, The rotating cone is sleeved on the top of the rotating cylinder, and the rotating cone is movably connected to the rotating cylinder to adjust the gap between the rotating cone and the conical tank.

8. The stirring device for denitrification catalyst in thermal power plants according to claim 1, characterized in that, It also includes stirring blocks, a plurality of which are distributed in a ring around the rotating cone on the outer wall of the top of the rotating cone.

9. The stirring device for denitrification catalyst in thermal power plants according to claim 1, characterized in that, The exhaust pipe has multiple air holes on its side wall. The air holes are evenly distributed along the circumferential direction of the exhaust pipe, and the diameter of the air holes decreases from bottom to top.

10. The stirring device for denitrification catalyst in thermal power plants according to claim 1, characterized in that, The bottom of the flue gas canister is provided with multiple support legs, the other end of which is connected to the base, and there is a gap between the bottom of the flue gas canister and the base.

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