Gas turbine SCR denitration flue gas uniform mixing flow guide device

Abstract

The present application relates to a kind of gas turbine SCR denitration flue gas uniform mixing flow guide device, it is related to gas turbine flue gas denitration equipment technical field, including denitration tower, the top of denitration tower is connected with smoke inlet pipe, dynamic adjustment flow guide mechanism, ammonia injection mechanism and denitration inlet flow guide mechanism are sequentially arranged in smoke inlet pipe inside along the direction of airflow.Dynamic adjustment flow guide mechanism can collect flue gas parameter in real time, self-adapting adjustment flow guide vane angle and cooperate arc plate complete flue gas rectification, adapt gas turbine variable condition exhaust smoke fluctuation.Ammonia injection mechanism is atomized by cyclone structure denitration reducing agent and generates cyclone disturbance, realizes flue gas and reducing agent preliminary mixing.Denitration inlet flow guide mechanism is based on arc transition structure and layered flow guide plate secondary carding to mixed flue gas, balance ammonia nitrogen concentration distribution.The device uses multistage flow guide mixing structure, can effectively reduce ammonia escape problem, reduce flue ventilation resistance and exhaust fan operating energy consumption, improve the operating stability of gas turbine SCR denitration system.

Description

Technical Field

[0001] This invention relates to the technical field of flue gas denitrification equipment for gas turbines, and specifically to a uniform mixing and guiding device for flue gas denitrification in gas turbines via SCR. Background Technology

[0002] During the operation of a gas turbine equipped with an SCR denitrification system, the gas turbine output load fluctuates frequently, and the flue gas velocity and the concentration of nitrogen oxides inside the flue gas are prone to uneven distribution. Conventional denitrification flues in the industry only use fixed guide vanes to complete flue gas rectification. Fixed ammonia injection pipes are set in the middle section of the flue to inject denitrification reducing agent into the flue gas. Right-angle deflection structures are directly used at the bends of the flue to complete the airflow turning. The rectification, ammonia injection, and flow splitting components are arranged independently. The mixing of flue gas and reducing agent is completed solely by fixed structures, without adaptive adjustment and multi-stage layered flow guiding structures.

[0003] Existing fixed flow guiding structures cannot adjust the flue gas flow field in real time to adapt to varying gas turbine operating conditions. Flue gas deflection and eddies caused by load fluctuations are difficult to eliminate, resulting in significant differences in velocity distribution within the pipe. Single-stage fixed ammonia injection structures have limited mixing disturbance capacity, easily leading to localized ammonia concentration imbalances and ammonia escape. Right-angle deflected flues exacerbate airflow impact and eddy current losses, resulting in high overall flue gas ventilation resistance and increased exhaust fan energy consumption. Furthermore, the lack of a pre-collection structure for dust allows it to easily adhere to the surfaces of the flow guiding and ammonia injection components, causing blockages and affecting the stable operation of the denitrification system. Therefore, there is an urgent need to design a gas turbine SCR denitrification flue gas uniform mixing and flow guiding device to solve these problems. Summary of the Invention

[0004] The purpose of this invention is to provide a gas turbine SCR denitrification flue gas uniform mixing and guiding device to overcome the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A gas turbine SCR denitrification flue gas uniform mixing and guiding device includes a denitrification tower with an inlet pipe connected to the top; a dynamic adjustment guiding mechanism including vertical guide vanes, a sensing module, a linkage toothed belt, a motor, and a first arc plate, which collects flue gas parameters through the sensing module, outputs power from the motor, and transmits power through the linkage toothed belt, driving the vertical guide vanes to cooperate with the first arc plate to change the flue gas flow direction; an ammonia injection mechanism including a support frame, a swirl plate, a nozzle, and a delivery pipe, which delivers reducing agent through the delivery pipe, and the swirl plate carries the nozzle and generates swirling disturbance; and a denitrification inlet guiding mechanism including a second arc plate, a first guide plate, and a second guide plate, which transitions the airflow through the second arc plate and divides the airflow into layers through the first and second guide plates.

[0006] Preferably, the dynamic adjustment guide mechanism is located at the front end of the smoke inlet pipe cavity, the sensing module is fixedly installed on the inner wall of the smoke inlet pipe, the sensing module is electrically connected to the motor, the output end of the motor is engaged with the linkage toothed belt drive, the linkage toothed belt synchronously connects each set of vertical guide vanes, and the first arc plate is arranged arc-shaped along the bend wall of the smoke inlet pipe.

[0007] Preferably, the ammonia injection mechanism is located inside the flue gas inlet pipe cavity, the support frame is fixedly installed on the flue gas inlet pipe wall, the swirl plate is circumferentially arrayed inside the support frame, multiple sets of nozzles are evenly arranged on the surface of the swirl plate, and the delivery pipe passes through the flue gas inlet pipe wall and connects to the central channel of the swirl plate.

[0008] Preferably, the denitrification inlet guiding mechanism is located inside the bend pipe section connecting the flue gas inlet pipe and the denitrification tower, downstream of the ammonia injection mechanism. The second arc-shaped plate is fitted to the arc-shaped inner wall of the bend pipe section. The first guiding plate and the second guiding plate are fixed in parallel and layered along the airflow direction to the inner side of the second arc-shaped plate.

[0009] Preferably, the end of the flue gas inlet pipe away from the denitrification tower is connected to a flue gas inlet, and an ash hopper is installed below the bottom of the flue gas inlet. The ash hopper opening faces upward and is connected to the lower edge of the flue gas inlet for settling and collecting dust entrained in the flue gas.

[0010] Preferably, the bottom of the denitrification tower is connected to a flue pipe, which is bent downwards and connected to the catalytic reaction chamber inside the denitrification tower.

[0011] Preferably, multiple vertical guide vanes are arranged vertically at equal intervals along the cross-section of the smoke inlet pipe, and the end of the rotating shaft of each vertical guide vane is fixedly connected to the linkage toothed belt. Each group of vertical guide vanes synchronously completes the angular deflection with the linkage toothed belt.

[0012] Preferably, the swirl plate has a blade structure, and the nozzles are arranged in a radial annular array along the swirl plate, with the nozzle outlets inclined toward the direction of airflow.

[0013] Preferably, the first guide plate and the second guide plate are arranged in layers at intervals along the arc direction of the second arc plate, and a flue gas diversion channel of uniform width is formed between adjacent guide plates.

[0014] Preferably, the flue gas inlet has a bucket-shaped box structure that is wider at the top and narrower at the bottom. The lower end of the flue gas inlet is directly connected to the upper port of the ash hopper, and the dust that settles due to the weight of the flue gas falls directly into the ash hopper for storage.

[0015] In the above technical solution, the present invention provides a gas turbine SCR denitrification flue gas uniform mixing and guiding device, which has the following advantages: (1) This device is equipped with a dynamic adjustment guide mechanism. It relies on the sensor module to monitor the flue gas status inside the flue pipe in real time. The motor works in conjunction with the linkage toothed belt to adjust the angle of the vertical guide blades. It can actively correct the flue gas flow direction when the gas turbine load changes, the flue gas flow velocity is uneven, or there is local flow deviation. It does not require manual shutdown for adjustment, and can stably maintain the uniformity of flue gas flow velocity inside the flue pipe, reducing the interference of flue gas flow deviation on the denitrification reaction efficiency under different operating conditions.

[0016] (2) The device is set up with a three-stage mixing and rectification structure in sequence: dynamic adjustment flow guiding mechanism, ammonia injection mechanism, and denitrification inlet flow guiding mechanism. The vertical flow guiding blades first regulate the disordered flue gas, the swirl plate drives the nozzle to realize the swirling atomization and mixing of the reducing agent, and the denitrification inlet flow guiding mechanism sorts the mixed airflow in layers. The multi-layer structure can reduce the problem of excessively high or low local ammonia concentration, make the flue gas and reducing agent entering the denitrification tower more evenly mixed, and reduce ammonia escape.

[0017] (3) The dynamic adjustment guide mechanism, ammonia injection mechanism and denitrification inlet guide mechanism are arranged in sections along the airflow direction from the flue to the denitrification tower. The first arc plate and the second arc plate adopt an arc transition structure instead of a right angle baffle structure. With the layered vertical guide vanes, the first guide plate and the second guide plate, the eddy current and impact loss during flue gas flow can be weakened, and the ventilation resistance of the entire flue system can be reduced. Under the same flue gas treatment capacity, the load of the front-end exhaust fan is reduced, and the power consumption of the gas turbine exhaust system can be reduced in the long term. 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 embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a structural schematic diagram of an external embodiment of a gas turbine SCR denitrification flue gas uniform mixing and guiding device according to the present invention.

[0020] Figure 2 for Figure 1 Schematic diagram of the structure below the side.

[0021] Figure 3 This is a schematic diagram of the internal structure of the flue gas inlet pipe provided in an embodiment of the gas turbine SCR denitrification flue gas uniform mixing and guiding device of the present invention.

[0022] Figure 4 for Figure 3 The enlarged structural diagram at point A is shown.

[0023] Figure 5 for Figure 3Schematic diagram of the upper side structure.

[0024] Figure 6 for Figure 5 The enlarged structural diagram at point B is shown.

[0025] 1. Denitrification tower; 2. Inlet pipe; 3. Inlet port; 4. Ash hopper; 5. Outlet pipe; 6. Dynamic adjustment guide mechanism; 61. Vertical guide vane; 62. Sensing module; 63. Linkage toothed belt; 64. Motor; 65. First arc plate; 7. Ammonia injection mechanism; 71. Support frame; 72. Swirl plate; 73. Nozzle; 74. Conveying pipe; 8. Denitrification inlet guide mechanism; 81. Second arc plate; 82. First guide plate; 83. Second guide plate. Detailed Implementation

[0026] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0027] like Figure 1-6 As shown in the figure, an embodiment of the present invention provides a gas turbine SCR denitrification flue gas uniform mixing and guiding device, including a denitrification tower 1, with a flue gas inlet pipe 2 connected to the top of the denitrification tower 1; a dynamic adjustment guiding mechanism 6, which includes vertical guide vanes 61, a sensing module 62, a linkage toothed belt 63, a motor 64, and a first arc plate 65, which collects flue gas parameters through the sensing module 62, outputs power through the motor 64, and transmits power through the linkage toothed belt 63, thereby driving the vertical guide vanes 61 to cooperate with the first arc plate 65 to change the flue gas flow direction; an ammonia injection mechanism 7, which includes a support frame 71, a swirl plate 72, a nozzle 73, and a delivery pipe 74, which delivers reducing agent through the delivery pipe 74, and the swirl plate 72 carries the nozzle 73 and generates swirling disturbance; and a denitrification inlet guiding mechanism 8, which includes a second arc plate 81, a first guiding plate 82, and a second guiding plate 83, which allows the airflow to transition through the second arc plate 81 and the airflow to be divided into layers by the first guiding plate 82 and the second guiding plate 83.

[0028] The entire unit is constructed from Q345 heat-resistant carbon steel and is suitable for gas turbine exhaust conditions of 300 to 450℃. The complete set of equipment includes a denitrification tower 1, an inlet pipe 2, a dynamic adjustment flow guiding mechanism 6, an ammonia injection mechanism 7, and a denitrification inlet flow guiding mechanism 8. The denitrification tower 1 is a rectangular box with a wall thickness of 8mm. The inside of the box is divided into multiple catalyst installation chambers. A square flange is reserved on the top of the box for connecting to the inlet pipe 2. A single unit is suitable for a flue gas treatment capacity of 10,000~50,000 Nm³ / h. The inlet pipe 2 is a square bend with a wall thickness of 6mm, which is divided into a horizontal straight section and an arc bend section, serving as a flue gas flow carrier to connect all functional components. The dynamic adjustment guide mechanism 6 is equipped with 6 to 12 rectangular vertical guide vanes 61 with a thickness of 3 mm. The two ends of the vanes are equipped with rotating shafts. The sensing module 62 integrates 4 sets of flow rate and NOx concentration detection probes. The linkage toothed belt 63 is a high-temperature resistant synchronous toothed belt and is equipped with blade synchronous gears. The motor 64 is a stepper motor with a temperature resistance of 500℃. The first arc plate 65 is 4 mm thick and matches the curvature of the bend in the smoke inlet pipe 2. After the sensing module 62 collects the flue gas parameters in the pipe, it transmits an electrical signal to the motor 64. The output torque of the motor 64 drives all the vertical guide vanes 61 to deflect synchronously through the linkage toothed belt 63. The deflecting vanes, in conjunction with the first arc plate 65, adjust the flue gas flow path. The ammonia injection mechanism 7 is equipped with a support frame 71. The swirl plate 72 has 6-10 inclined blades welded to its base. Each inclined blade is equipped with 6-10 atomizing nozzles 73. A φ10 stainless steel conveying pipe 74 connects to the central through-hole of the swirl plate 72. The conveying pipe 74 delivers the denitrification reducing agent to the center of the swirl plate 72. The reducing agent is atomized and sprayed out through the nozzles 73. The swirl plate 72 forms a swirling flow field, stirring the flue gas and mixing it with the atomized reducing agent. The denitrification inlet guiding mechanism 8 has a second arc-shaped plate 81 with a thickness of 4mm. A first guiding plate 82 and a second guiding plate 83 with a thickness of 3mm are fixed in parallel layers inside the second arc-shaped plate 81. The second arc-shaped plate 81 eliminates the airflow impact caused by right-angle deflections. The two types of guiding plates cut and divide the mixed flue gas in layers.

[0029] In this embodiment, the dynamic adjustment guide mechanism 6 is located at the front end of the cavity of the smoke inlet pipe 2. The sensing module 62 is fixedly installed on the inner wall of the smoke inlet pipe 2. The sensing module 62 is electrically connected to the motor 64. The output end of the motor 64 is driven by the linkage toothed belt 63. The linkage toothed belt 63 synchronously connects each set of vertical guide vanes 61. The first arc plate 65 is arranged in an arc along the curved wall of the smoke inlet pipe 2.

[0030] The dynamic adjustment guide mechanism 6 is assembled on the front section of the horizontal straight pipe of the smoke inlet pipe 2. The sensing module 62 is fixed to the upper inner wall of the smoke inlet pipe 2 by bolts. The detection probe extends into the flow cavity of the pipe. The module is electrically connected to the motor 64 through a high-temperature shielded wire. The motor 64 is mounted on the support outside the pipe. The top of the shaft of the output shaft guide vane 61 is connected. The bottom of the shaft of the guide vane 61 is equipped with a drive gear that meshes with the linkage toothed belt 63 for transmission. The first arc plate 65 is fully welded to the arc bend of the smoke inlet pipe 2 and arranged on the downstream side of the vertical guide vane 61. All transmission and sensing components are coated with a high-temperature anti-corrosion coating. This assembly structure ensures that the sensing module 62 can collect unrectified flue gas parameters in real time. The motor 64 controls all vertical guide vanes 61 to deflect synchronously at the same angle through the linkage toothed belt 63. The first arc-shaped plate 65 receives the guided airflow, avoids local eddies in bends, and stably completes flue gas adaptive rectification under the variable load condition of the gas turbine, reducing the interference of flue gas deflection on denitrification efficiency. In this embodiment, the ammonia injection mechanism 7 is located inside the cavity of the flue gas inlet pipe 2, the support frame 71 is fixedly installed on the wall of the flue gas inlet pipe 2, the swirl plate 72 is arranged in a circumferential array inside the support frame 71, multiple sets of nozzles 73 are evenly distributed on the surface of the swirl plate 72, and the delivery pipe 74 passes through the wall of the flue gas inlet pipe 2 and connects to the central channel of the swirl plate 72.

[0031] The support frame 71 is welded and fixed to the wall of the flue gas inlet pipe 2. The blades of the swirl plate 72 are uniformly tilted at 15°, and the atomized particle size of the nozzle is maintained at 50~100μm. The delivery pipe 74 horizontally penetrates the pipe wall from the outside of the pipe, and the pipe end is sealed and connected to the central through hole of the swirl plate 72. The perforation position of the pipe wall is filled with high-temperature resistant sealing filler to prevent flue gas leakage. This support and connection structure can stably deliver the reducing agent to the center of the swirl plate 72. The swirl plate 72 generates a large-scale swirling disturbance field, prolonging the contact and mixing time between the atomized ammonia water and the flue gas, balancing the concentration of the reducing agent inside the flue gas, and reducing the situation of excessively high or low local ammonia concentration.

[0032] In this embodiment, the denitrification inlet guide mechanism 8 is located inside the bend pipe section connecting the flue gas pipe 2 and the denitrification tower 1, downstream of the ammonia injection mechanism 7. The second arc plate 81 is fitted to the arc-shaped inner wall of the bend pipe section. The first guide plate 82 and the second guide plate 83 are fixed in parallel layers on the inner side of the second arc plate 81 along the gas flow direction.

[0033] The denitrification inlet guide mechanism 8 is installed inside the arc-shaped bend section connecting the flue gas inlet pipe 2 and the denitrification tower 1, located downstream of the ammonia injection mechanism 7. The second arc-shaped plate 81 is fully welded to the arc-shaped inner wall of the bend pipe section, eliminating the right-angle bend structure of the pipe. The first guide plate 82 and the second guide plate 83 are welded to the inlet of the denitrification tower 1 along the airflow direction, with the second guide plate 83 inclined at 30° to the airflow direction. The layered guide plates can split the large mixed flue gas into multiple uniform thin-layer airflows, dispersing the local ammonia-rich airflow clusters after ammonia injection. The arc structure of the second arc plate 81 weakens the airflow impact and eddy current loss, reduces the ventilation resistance of the entire flue, and reduces the operating load of the front-end exhaust fan.

[0034] In this embodiment, the end of the flue gas inlet pipe 2 away from the denitrification tower 1 is connected to a flue gas inlet 3. A dust hopper 4 is installed below the bottom of the flue gas inlet 3. The opening of the dust hopper 4 faces upward and is connected to the lower edge of the flue gas inlet 3 for settling and collecting dust carried by the flue gas.

[0035] The flue gas inlet 3 is a 5mm thick, bucket-shaped box, wider at the top and narrower at the bottom, with a tapered funnel at the lower end. The ash hopper 4 is a carbon steel inverted cone-shaped dust collection box, with an open top connected to the lower edge of the funnel in the flue gas inlet 3 by bolts. A cleaning and maintenance port with a sealing cover is reserved at the bottom of the side wall of the ash hopper, and the inclination angle of the hopper is greater than the dust's angle of repose. After the flue gas enters the flue gas inlet 3, the flow cross-section expands and the flow velocity decreases. The dust carried by the flue gas slides down the inclined surface of the hopper body by its own weight and is stored inside the ash hopper 4, reducing the amount of solid dust that enters the rear guide and ammonia injection precision components with the airflow, thus reducing the frequency of component blockage and jamming failures.

[0036] In this embodiment, a flue pipe 5 is connected to the bottom of the denitrification tower 1. The flue pipe 5 is bent downwards and its cavity is connected to the catalytic reaction chamber inside the denitrification tower 1.

[0037] A square air outlet is located at the bottom of the denitrification tower 1 housing. The outlet flange connects downwards to a 6mm thick, integrally bent square flue pipe 5. The bent section of flue pipe 5 features a large arc transition, and the end of the pipe extends horizontally outwards. Flue pipe 5 is fully connected to the internal catalytic reaction chamber of denitrification tower 1, with no obstructions inside the chamber. The large arc transition of flue pipe 5 reduces the resistance to clean flue gas discharge, prevents flue gas stagnation at the bottom of denitrification tower 1, ensures continuous and stable flue gas flow throughout the entire unit, and maintains a constant flue gas treatment flow rate.

[0038] In this embodiment, multiple vertical guide vanes 61 are arranged vertically at equal intervals along the cross-section of the smoke inlet pipe 2. The rotating shaft end of each vertical guide vane 61 is fixedly connected to the linkage toothed belt 63. Each group of vertical guide vanes 61 synchronously completes the angular deflection with the linkage toothed belt 63.

[0039] The dynamic adjustment guide mechanism 6 contains 6-12 vertical guide vanes 61 arranged at equal intervals along the cross-section of the flue gas inlet pipe 2. Each vane's upper and lower shafts are equipped with high-temperature resistant self-lubricating bearings, and a synchronous gear is fixed to the extended end of the shaft. All synchronous gears are uniformly meshed inside a single linkage toothed belt 63. When the motor 64 drives the linkage toothed belt 63 to rotate cyclically, all vanes deflect synchronously in the same direction. The adjustable angle range of the vanes is 0-90°. The single linkage toothed belt synchronously drives all guide vanes, ensuring that the flue gas at all points on the pipe cross-section adjusts its flow direction synchronously, preventing local deviations in the guide angle. Under conditions of fluctuating gas turbine load and flue gas deflection, the overall flow field is corrected, stabilizing the uniformity of the flow velocity inside the pipe.

[0040] In this embodiment, the swirl plate 72 is a blade structure, and the nozzles 73 are arranged in a radial annular array along the swirl plate 72. The nozzles 73 are inclined towards the direction of airflow.

[0041] The swirl plate forms a continuous spiral airflow field, and the tilted nozzles directly send atomized ammonia water into the swirl field, prolonging the mixing and contact time between the reducing agent and the flue gas, reducing the ammonia concentration difference inside the flue gas, and reducing the ammonia escape at the outlet of the denitrification tower 1.

[0042] In this embodiment, the first guide plate 82 and the second guide plate 83 are arranged in layers at intervals along the arcuate direction of the second arcuate plate 81, and a flue gas diversion channel of uniform width is formed between adjacent guide plates.

[0043] The first guide plate 82 and the second guide plate 83 progressively divide the large volume of mixed flue gas along the airflow direction. The equal-width layered channels can evenly distribute the flue gas, and the arc structure of the second arc plate eliminates the resistance loss caused by right-angle deflection, reducing the overall ventilation resistance of the flue and reducing the power consumption of the matching exhaust fan during long-term operation.

[0044] In this embodiment, the flue gas inlet 3 is a bucket-shaped box structure that is wider at the top and narrower at the bottom. The lower end of the flue gas inlet 3 is directly connected to the upper port of the ash hopper 4, and the dust that settles due to the weight of the flue gas falls directly into the ash hopper 4 for storage.

[0045] The top air intake section of the flue gas inlet 3 is larger than the bottom constricted section. The side wall of the inlet is inclined at 45°, and the bottom funnel port is completely aligned with the top opening of the ash hopper 4. The two are sealed with flanges. The bottom of the ash hopper 4 is a conical dust collection chamber for temporary storage of settled dust. The 45° inclined side wall is larger than the natural angle of repose of gas turbine dust, allowing dust to slide down without retention after contacting the side wall. The funnel-shaped structure expands the air intake section and reduces the internal flue gas velocity, promoting dust to detach from the airflow and complete settling. This continuously protects the rear guide and ammonia injection precision components from dust erosion and blockage.

[0046] Working steps: The nitrogen oxide-containing flue gas discharged from the gas turbine first flows into the flue gas inlet 2 through the flue gas inlet 3. During the downward flow of the flue gas, the ash hopper 4 simultaneously collects the dust particles carried by the flue gas to prevent solid impurities from entering the downstream denitrification unit and causing component blockage and wear. When the flue gas continues to flow through the area of ​​the dynamic adjustment guide mechanism 6, the sensing module 62 collects the flue gas velocity and concentration distribution data in the flue gas inlet 2 in real time and transmits the signal to the motor 64. The motor 64 outputs power and drives multiple sets of vertical guide vanes 61 to deflect synchronously through the linkage toothed belt 63. In conjunction with the first arc plate 65, it changes the flue gas flow direction and performs preliminary rectification of the deflected and vortex flue gas, making the flue gas velocity field in the pipe tend to be uniform. The flue gas that has completed the initial rectification continues to be conveyed forward and enters the installation area of ​​the ammonia injection mechanism 7. The external reducing agent is sent to the center of the swirl plate 72 through the conveying pipe 74 and atomized by multiple sets of nozzles 73 supported by the swirl plate 72. The swirl plate 72 completes the preliminary mixing of flue gas and denitrification reducing agent by means of swirling disturbance. The mixed flue gas flows towards the denitrification inlet guide mechanism 8. The second arc-shaped plate 81, the first guide plate 82, and the second guide plate 83 perform secondary stratification and guidance of the mixed gas flow, breaking up localized high-concentration ammonia nitrogen accumulation areas and further reducing the concentration difference between the flue gas and the reducing agent, forming a uniformly mixed flue gas. Finally, the uniformly mixed flue gas enters the denitrification tower 1, where a reduction reaction occurs in the catalyst layer of the denitrification tower 1, removing nitrogen oxides from the flue gas. The purified flue gas is then discharged out through the flue gas outlet pipe 5.

[0047] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A gas turbine SCR denitrification flue gas uniform mixing and guiding device, comprising a denitrification tower (1), characterized in that, The top of the denitrification tower (1) is connected to a flue gas inlet pipe (2); The dynamic adjustment guide mechanism (6) includes vertical guide vanes (61), a sensing module (62), a linkage toothed belt (63), a motor (64), and a first arc plate (65). It collects flue gas parameters through the sensing module (62), outputs power through the motor (64), and transmits power through the linkage toothed belt (63), thereby driving the vertical guide vanes (61) to cooperate with the first arc plate (65) to change the flue gas flow direction. The ammonia injection mechanism (7) includes a support frame (71), a swirl plate (72), a nozzle (73), and a delivery pipe (74). The reducing agent is delivered through the delivery pipe (74), and the swirl plate (72) carries the nozzle (73) and generates swirling disturbance. The denitrification inlet guide mechanism (8) includes a second arc plate (81), a first guide plate (82), and a second guide plate (83). The second arc plate (81) facilitates the flow of air, and the first guide plate (82) and the second guide plate (83) divide the airflow into layers.

2. The gas turbine SCR denitrification flue gas uniform mixing and guiding device according to claim 1, characterized in that, The dynamic adjustment guide mechanism (6) is located at the front end of the cavity of the smoke inlet pipe (2). The sensing module (62) is fixedly installed on the inner wall of the smoke inlet pipe (2). The sensing module (62) is electrically connected to the motor (64). The output end of the motor (64) is driven by the linkage toothed belt (63). The linkage toothed belt (63) is synchronously connected to each set of vertical guide vanes (61). The first arc plate (65) is arranged in an arc along the curved pipe wall of the smoke inlet pipe (2).

3. The gas turbine SCR denitrification flue gas uniform mixing and guiding device according to claim 1, characterized in that, The ammonia injection mechanism (7) is located inside the cavity of the flue gas inlet pipe (2). The support frame (71) is fixedly installed on the wall of the flue gas inlet pipe (2). The swirl plate (72) is arranged in a circumferential array inside the support frame (71). Multiple sets of nozzles (73) are evenly arranged on the surface of the swirl plate (72). The delivery pipe (74) passes through the wall of the flue gas inlet pipe (2) and connects to the central channel of the swirl plate (72).

4. The gas turbine SCR denitrification flue gas uniform mixing and guiding device according to claim 1, characterized in that, The denitrification inlet guide mechanism (8) is located inside the bend pipe section connecting the flue gas pipe (2) and the denitrification tower (1), downstream of the ammonia injection mechanism (7). The second arc plate (81) is fitted to the arc-shaped inner wall of the bend pipe section. The first guide plate (82) and the second guide plate (83) are fixed in parallel layers along the airflow direction to the inner side of the second arc plate (81).

5. The gas turbine SCR denitrification flue gas uniform mixing and guiding device according to claim 1, characterized in that, The end of the flue gas inlet pipe (2) away from the denitrification tower (1) is connected to a flue gas inlet (3). A dust hopper (4) is installed below the bottom of the flue gas inlet (3). The opening of the dust hopper (4) faces upward and is connected to the lower edge of the flue gas inlet (3) for settling and collecting dust carried by the flue gas.

6. The gas turbine SCR denitrification flue gas uniform mixing and guiding device according to claim 1, characterized in that, The bottom of the denitrification tower (1) is connected to a flue pipe (5), which is bent downwards and connected to the catalytic reaction chamber inside the denitrification tower (1).

7. The gas turbine SCR denitrification flue gas uniform mixing and guiding device according to claim 2, characterized in that, Multiple vertical guide vanes (61) are arranged vertically at equal intervals along the cross section of the smoke inlet pipe (2). The rotating shaft end of each vertical guide vane (61) is fixedly connected to the linkage toothed belt (63). Each group of vertical guide vanes (61) completes angular deflection synchronously with the linkage toothed belt (63).

8. The gas turbine SCR denitrification flue gas uniform mixing and guiding device according to claim 3, characterized in that, The swirl plate (72) has a blade structure, and the nozzles (73) are arranged in a radial annular array along the swirl plate (72). The nozzles (73) are inclined at the outlet towards the direction of airflow.

9. A gas turbine SCR denitrification flue gas uniform mixing and guiding device according to claim 4, characterized in that, The first guide plate (82) and the second guide plate (83) are arranged in layers at intervals along the arc direction of the second arc plate (81), and a flue gas diversion channel of uniform width is formed between adjacent guide plates.

10. A gas turbine SCR denitrification flue gas uniform mixing and guiding device according to claim 5, characterized in that, The smoke inlet (3) is a bucket-shaped box structure that is wider at the top and narrower at the bottom. The lower end of the smoke inlet (3) is directly connected to the upper port of the ash hopper (4), and the dust that settles due to the weight of the flue gas falls directly into the ash hopper (4) for storage.

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