Waste gas purification equipment for heavy gas turbine

Abstract

The invention discloses waste gas purification equipment for a heavy gas turbine, and relates to the technical field of waste gas treatment.The waste gas purification equipment is characterized in that an SCR catalytic carrier is of a spherical porous honeycomb structure, so that the spherical surface of the SCR catalytic carrier serves as a gas inlet point, and the sphere center of the SCR catalytic carrier serves as a gas outlet point; high-temperature waste gas mixed with atomized urea can be uniformly sucked from the outer surface of the SCR catalytic carrier and dispersedly penetrates through a catalyst layer to converge towards the center, so that uniform contact and gradual reaction of the waste gas and the catalyst can be realized, the area proportion of the reaction front end of the SCR catalytic carrier can be effectively increased, the proportion of the middle-rear end of the SCR catalytic carrier can be reduced, and the reaction efficiency of the SCR catalytic carrier is improved. The problems of concentrated front-end reaction load and low middle-rear end utilization rate of a traditional carrier are solved, so that the utilization rate of the whole catalyst is effectively improved, the consumption of noble metal is reduced, the high NOx purification efficiency is effectively ensured, and the long-term running cost of equipment is reduced to a certain extent.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, and in particular to a waste gas purification device for heavy-duty gas turbines. Background Technology

[0002] Heavy-duty gas turbines produce air pollutants, primarily nitrogen oxides, during operation. Currently, selective catalytic reduction (SCR) technology is the key technology for addressing nitrogen oxide emissions from heavy-duty gas turbines. x The mainstream purification technology involves injecting a reducing agent into the exhaust gas, which, under the action of a catalyst, reduces NO. x It is converted into pollution-free nitrogen and water, and has the advantages of high purification efficiency and stable operation.

[0003] In existing heavy-duty gas turbine exhaust gas purification equipment, SCR catalyst carriers generally adopt a cylindrical structure design. In practical applications, because the flow channel of the cylindrical catalyst carrier is an axial straight-through structure, the high-temperature and high-pressure exhaust gas discharged from the heavy-duty gas turbine will flow rapidly along the axis of the carrier under the drive of pressure difference. This makes the airflow easily concentrated in the front area of ​​the carrier to complete mass transfer and catalytic reaction. This results in the rapid occupation of the catalyst active sites at the front of the carrier and a highly concentrated reaction load. Meanwhile, the catalyst at the rear of the carrier is difficult to fully participate in the catalytic reaction due to the reduced concentration of exhaust gas reactants, forming a significant difference in utilization rate. This not only seriously restricts the improvement of overall purification efficiency, but also easily causes the catalyst at the rear of the catalyst carrier to be idle, greatly increasing the operating cost of the equipment and wasting resources.

[0004] Therefore, a waste gas purification device for heavy-duty gas turbines is proposed to solve some of the problems existing in the above-mentioned prior art. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies where the exhaust gas from heavy-duty gas turbines is concentrated in the front-end region of the catalytic carrier, resulting in concentrated reaction load, low utilization rate of the middle and rear regions, and reduced purification efficiency. Therefore, this invention proposes an exhaust gas purification device for heavy-duty gas turbines.

[0006] To address the problems existing in the prior art, the present invention adopts the following technical solution: A waste gas purification device for heavy-duty gas turbines includes a housing, an SCR catalytic converter installed inside the housing, the SCR catalytic converter having a spherical structure and a porous honeycomb structure, an air inlet on the outer surface of the SCR catalytic converter, an air outlet at the center of the SCR catalytic converter, an exhaust pipe fixedly connected to the center of the SCR catalytic converter and connected to the rear end of the housing, a connecting cylinder fixedly connected to the front end of the housing, an atomizing component installed inside the connecting cylinder, and a DPF unit fixedly connected to the front end of the connecting cylinder.

[0007] Preferably, a support is fixedly installed inside the shell in front of the SCR catalyst support, and multiple evenly distributed flow dividers are opened in the support. A flow guide shroud corresponding to and communicating with the multiple flow dividers is fixedly installed behind the support, and the rear end of the flow guide shroud is evenly distributed on the outer surface of the SCR catalyst support.

[0008] Preferably, the SCR catalyst carrier is composed of multiple nested spherical shells, the center positions of the multiple spherical shells coincide with each other, and a gap is formed between two adjacent spherical shells. The exhaust pipe is fixedly connected to the center position of the innermost spherical shell, and multiple nested rotating cylinders are rotatably connected to the outside of the exhaust pipe. The multiple rotating cylinders are fixedly connected to the multiple spherical shells one by one.

[0009] Preferably, a first dividing plate located behind the atomizing component is fixedly installed inside the connecting cylinder, and a second dividing plate is fixedly installed behind the first dividing plate. The first dividing plate is composed of three partitions evenly distributed around it, and the second dividing plate is composed of six partitions evenly distributed around it.

[0010] Preferably, the atomizing component includes a delivery pipe fixedly connected to the inner wall of the connecting cylinder, and a spray pipe located on the central axis of the connecting cylinder is fixedly connected to the delivery pipe, and a nozzle perpendicularly pointing to the center of the first dividing plate is fixedly installed at the rear end of the spray pipe.

[0011] Preferably, a column rod is slidably inserted into the nozzle, and a spring for elastic support of the column rod is installed inside the nozzle. A valve block corresponding to the delivery pipe is fixedly installed at the rear end of the column rod, and a channel connecting its cylindrical surface and the nozzle is opened in the valve block. A circular plate is fixedly installed at the front end of the column rod.

[0012] Preferably, the front end of the DPF unit is fixedly connected to a turbofan housing, and a turbofan body is rotatably installed inside the turbofan housing. The rear ends of multiple rotating cylinders are respectively fixedly installed with interlocking gear rings, and a gear set that meshes with the multiple gear rings is rotatably installed inside the housing, and the gear set is connected to the rotating shaft of the turbofan body for transmission.

[0013] Preferably, a gear pump is fixedly installed on the outer side of the turbofan casing, and the internal shaft of the gear pump is fixedly connected to the internal shaft of the turbofan body. A water turbine is fixedly installed inside the casing, and the gear set is drivenly connected to the internal shaft of the water turbine. The outlet of the gear pump is connected to the inlet of the water turbine, and the inlet of the gear pump is connected to the outlet of the water turbine.

[0014] Preferably, a T-shaped pipe is fixedly connected between the front end of the DPF unit and the air outlet of the turbine casing, and a T-shaped pipe is fixedly connected between the air inlet of the turbine casing and the remaining end of the T-shaped pipe, and an electrically controlled valve is installed inside the T-shaped pipe.

[0015] Preferably, a one-way valve is fixedly installed between the air outlet of the turbine casing and the T-shaped pipe.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, by setting the SCR catalyst support as a spherical porous honeycomb structure, the SCR catalyst support uses the spherical surface as the air inlet and the center of the sphere as the air outlet. This allows high-temperature exhaust gas mixed with atomized urea to be uniformly drawn in from the outer surface of the SCR catalyst support and dispersed through the catalyst layer towards the center. This achieves uniform contact between the exhaust gas and the catalyst, as well as a gradual reaction. It can effectively increase the proportion of the front-end area of ​​the SCR catalyst support reaction and reduce the proportion of the middle and rear ends. This helps to change the problem of concentrated reaction load at the front end and low utilization rate at the middle and rear ends of traditional supports, thereby effectively improving the overall catalyst utilization rate. While reducing the amount of precious metals used, it effectively ensures high NOx purification efficiency and reduces the long-term operating cost of the equipment to a certain extent. 2. In this invention, an SCR catalyst carrier is constructed by setting up multiple layers of concentric rotatable spherical shells, and a transmission system consisting of a turbofan, gear pump, water turbine and gear set is driven by the residual pressure of the exhaust gas. Through the speed difference, the spherical shells can generate slow relative rotation, which is beneficial for continuously cleaning the gaps between the carriers and preventing the deposition of particulate matter and ammonium salts. At the same time, the mechanical disturbance of the catalyst surface helps to extend the service life of the catalyst, maintain the stability and efficiency of the long-term operation of the purification equipment, and reduce the need for pressure drop increase and frequent shutdown for cleaning and maintenance caused by blockage. 3. In this invention, by placing most of the conveying pipe inside the connecting cylinder, the waste heat of the high-temperature exhaust gas can be used to preheat the urea in the conveying pipe, which is beneficial to improving the atomization and decomposition rate of urea. At the same time, by fixing the circular plate to the front end of the column rod, the exhaust gas flow pressure can be used to drive the circular plate to move the valve block linearly, thereby adjusting the opening and closing range between the channel and the conveying pipe. This is beneficial to achieve adaptive adjustment, so that the urea injection volume and the exhaust gas flow rate are matched in real time, which is beneficial to improve the accuracy of ammonia nitrogen ratio control and reduce the risk of ammonia escape. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a side cross-sectional view of the present invention; Figure 2 This is a perspective view of the present invention; Figure 3 This is a top cross-sectional view of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 This is a split view of multiple spherical shells within the SCR catalyst support of the present invention; Figure 6 This is a perspective view of the SCR catalyst support, gear ring, gear set, and turbine of the present invention; Figure 7 This is a perspective view of the front end of the bracket, diversion hole, and flow guide cover of the present invention. Figure 8 This is a perspective view of the rear end of the bracket, diversion hole, and flow guide cover of the present invention. Figure 9 This is a split view of the first and second equal-dividing plates of the present invention; Figure 10 This is an exploded view of the atomizing component of the present invention.

[0018] In the picture: 1. Outer shell; 11. Spherical shell; 12. Exhaust pipe; 13. Support; 14. Diverter hole; 15. Radiator; 16. Gap; 17. Rotating drum; 2. Connecting cylinder; 21. First dividing plate; 22. Second dividing plate; 3. Atomizing assembly; 31. Delivery pipe; 32. Spray pipe; 33. Nozzle; 34. Column rod; 35. Spring; 36. Valve block; 37. Channel; 38. Circular plate; 4. DPF unit; 5. Turbofan casing; 51. Turbofan body; 52. Gear ring; 53. Gear set; 54. Gear pump; 55. Water turbine; 6. T-shaped pipe; 61. Three-way pipe; 62. One-way valve. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Example: This example provides an exhaust gas purification device for heavy-duty gas turbines. See [link to example]. Figure 1 - Figure 10Specifically, it includes an outer shell 1, inside which an SCR catalyst carrier is installed. The SCR catalyst carrier is configured with a spherical structure and a porous honeycomb structure. The outer surface of the SCR catalyst carrier is configured as an air inlet, and the center position of the SCR catalyst carrier is configured as an air outlet. An exhaust pipe 12 is fixedly connected to the center position of the SCR catalyst carrier and is connected to the rear end of the outer shell 1. A bracket 13 located in front of the SCR catalyst carrier is fixedly installed inside the outer shell 1, and multiple evenly distributed diversion holes 14 are opened in the bracket 13. A guide shroud 15 corresponding to and connected to the multiple diversion holes 14 is fixedly installed behind the bracket 13, and the rear end of the guide shroud 15 is evenly distributed on the outer surface of the SCR catalyst carrier. A connecting cylinder 2 is fixedly connected to the front end of the outer shell 1, and an atomizing component 3 is installed inside the connecting cylinder 2. A DPF unit 4 is fixedly connected to the front end of the connecting cylinder 2.

[0021] The SCR catalyst carrier is composed of multiple nested spherical shells 11, with the center positions of the multiple spherical shells 11 overlapping each other. A gap 16 is formed between two adjacent spherical shells 11. The exhaust pipe 12 is fixedly connected to the center position of the innermost spherical shell 11. Multiple nested rotating cylinders 17 are rotatably connected to the outside of the exhaust pipe 12. The multiple rotating cylinders 17 are fixedly connected to the multiple spherical shells 11 in a one-to-one correspondence.

[0022] When the device is in use, the exhaust gas passes through the DPF unit 4, where most of the particulate matter in the exhaust gas is captured and removed. The pre-purified exhaust gas flows into the connecting cylinder 2, and the atomized urea solution is sprayed into the exhaust gas through the atomizing component 3. The urea is rapidly decomposed into ammonia in the high-temperature exhaust gas. The mixture of exhaust gas and ammonia enters numerous evenly distributed diversion holes 14 and is guided by the guide shroud 15 to the entire outer surface of the spherical SCR catalyst carrier. After being guided by the guide shroud 15, the exhaust gas is evenly distributed on the entire outer surface of the outermost spherical shell 11. Then, under the action of pressure difference, it radially penetrates the porous honeycomb wall of each spherical shell 11. During this process, NOx undergoes a reduction reaction with the catalyst, and the purified gas continuously gathers towards the center of the sphere and is finally discharged unidirectionally through the central exhaust pipe 12.

[0023] During the catalytic reaction, since each rotating cylinder 17 is nested and rotatably connected, each rotating cylinder 17 can be controlled to rotate. The rotation of multiple rotating cylinders 17 drives the corresponding spherical shells 11 to rotate, so that multiple spherical shells 11 rotate slowly around the central axis of the exhaust pipe 12 at different speeds, causing relative motion between two adjacent spherical shells 11. This continuously scrapes the gaps 16 using mechanical shearing action, which can not only further improve the flow uniformity of the exhaust gas during its passage, but also effectively prevent the deposition and blockage of particles and reaction byproducts, thus helping to maintain unobstructed flow channels and catalytic activity.

[0024] In the specific implementation process, such as Figure 1 , Figure 3 and Figure 9 As shown, a first dividing plate 21 is fixedly installed inside the connecting cylinder 2, located behind the atomizing component 3, and a second dividing plate 22 is fixedly installed behind the first dividing plate 21. The first dividing plate 21 consists of three evenly distributed baffles, and the second dividing plate 22 consists of six evenly distributed baffles. When the device is in use, the exhaust gas flowing into the connecting cylinder 2 from the DPF unit 4 first impacts the first dividing plate 21 and is divided into three main streams by its three baffles. Subsequently, each stream is immediately further subdivided and guided by the six baffles of the second dividing plate 22. Through these two stages of asymmetrical baffle structure, the original flow direction and distribution of the exhaust gas can be strongly disrupted, causing it to generate violent turbulence. This provides sufficient shearing and diffusion conditions for the subsequently injected urea droplets, enabling rapid and uniform premixing of ammonia and exhaust gas before entering the spherical SCR carrier. This lays the foundation for the efficient catalytic reduction of the exhaust gas in the SCR catalytic carrier.

[0025] In the specific implementation process, such as Figure 1 , Figure 3 - Figure 4 and Figure 10 As shown, the atomizing component 3 includes a delivery pipe 31 fixedly connected to the inner wall of the connecting cylinder 2, and a nozzle 32 located on the central axis of the connecting cylinder 2 is fixedly connected to the delivery pipe 31. A nozzle 33 perpendicularly pointing to the center of the first dividing plate 21 is fixedly installed at the rear end of the nozzle 32. A rod 34 is slidably inserted into the nozzle 32, and a spring 35 for elastically supporting the rod 34 is installed inside the nozzle 32. A valve block 36 corresponding to the delivery pipe 31 is fixedly installed at the rear end of the rod 34, and a channel 37 connecting its cylindrical surface and the nozzle 33 is opened in the valve block 36. A circular plate 38 is fixedly installed at the front end of the rod 34. When the device is in use, the delivery pipe 31 is placed inside the connecting cylinder 2. With this structure, the urea can stay in the connecting cylinder 2 for a longer time before being atomized and sprayed out through the nozzle 33. This allows the waste heat of the high-temperature exhaust gas to preheat the urea in the delivery pipe 31, which is beneficial to improve the atomization and decomposition rate of the urea after it is sprayed out.

[0026] When the exhaust gas flows through the connecting cylinder 2, its dynamic pressure acts on the circular plate 38, generating a backward thrust. This thrust is transmitted through the rod 34, causing the valve block 36 to overcome the preload of the spring 35 and slide backward within the nozzle 32. The displacement of the valve block 36 directly depends on the exhaust gas flow rate. By sliding the valve block 36, the overlap area between the inlet of the channel 37 on the cylindrical surface of the valve block 36 and the outlet of the delivery pipe 31 can be changed, i.e., the opening of the urea flow. This facilitates the adaptive adjustment effect of the urea injection flow rate increasing linearly with the increase of the exhaust gas flow rate.

[0027] In the specific implementation process, such as Figure 1 - Figure 3 and Figure 6As shown, the front end of the DPF unit 4 is fixedly connected to the turbine housing 5, and the turbine body 51 is rotatably installed inside the turbine housing 5. The rear ends of multiple rotating cylinders 17 are respectively fixedly installed with interlocking gear rings 52. The housing 1 is rotatably installed with gear sets 53 that mesh with the multiple gear rings 52, and the gear sets 53 are drivenly connected to the rotating shaft of the turbine body 51. The outside of the turbine housing 5 is fixedly installed with a gear pump 54, and the rotating shaft inside the gear pump 54 is fixedly connected to the rotating shaft of the turbine body 51. The housing 1 is fixedly installed with a water turbine 55, and the gear sets 53 are drivenly connected to the rotating shaft inside the water turbine 55. The outlet of the gear pump 54 is connected to the inlet of the water turbine 55, and the inlet of the gear pump 54 is connected to the outlet of the water turbine 55.

[0028] When the device is in use, in the conventional exhaust gas purification mode, the high-temperature and high-pressure exhaust gas discharged from the engine first enters the turbofan casing 5, driving the turbofan body 51 to rotate at high speed, recovering part of the pressure energy and kinetic energy in the exhaust gas. Subsequently, the exhaust gas with a slightly reduced temperature flows out of the turbofan casing 5 and enters the DPF unit 4 behind it for particulate matter capture. The rotating shaft of the turbofan body 51 serves as the primary power output end, which can drive the gear pump 54 to operate. Through the continuous drive of the medium by the gear pump 54, the medium circulates between the gear pump 54 and the water turbine 55. A small medium storage tank is connected between the gear pump 54 and the water turbine 55. The medium can be oil. Under the continuous circulation of the medium, the impeller in the water turbine 55 is driven to rotate continuously, causing its shaft to rotate and transmitting the rotational power to the gear set 53. Then, with the help of the meshing of many gears and multiple gear rings 52 in the gear set 53, multiple spherical casings 11 are rotated.

[0029] Long-distance transmission of rotational power through oil connection can reduce energy loss during long-distance transmission and reduce the complexity of the drive structure. In the gear set 53, the transmission ratios of multiple gears meshing with multiple gear rings 52 are different, resulting in different rotational speeds of multiple spherical shells 11.

[0030] In the specific implementation process, such as Figure 1 - Figure 3As shown, a T-shaped pipe 6 is fixedly connected between the front end of the DPF unit 4 and the air outlet of the turbofan housing 5. A three-way pipe 61 is fixedly connected between the air inlet of the turbofan housing 5 and the remaining end of the T-shaped pipe 6, and an electronically controlled valve is installed inside the three-way pipe 61. A one-way valve 62 is fixedly installed between the air outlet of the turbofan housing 5 and the T-shaped pipe 6. When the device is in use, when the DPF unit 4 needs to perform active regeneration, the control system activates the electronically controlled valve in the three-way pipe 61 to switch the passage, so that the ultra-high temperature exhaust gas discharged from the engine does not pass through the turbofan housing 5, but directly enters the front end of the DPF unit 4 through the T-shaped pipe 6. This can provide the high temperature required for DPF regeneration and avoid the ultra-high temperature exhaust gas flowing through the turbofan housing 5 and causing thermal damage to the internal turbofan body 51. When the regeneration process of the DPF unit 4 is completed, the electronically controlled valve in the three-way pipe 61 is reset, and the airflow returns to the normal purification path through the turbofan housing 5.

[0031] By installing a one-way valve 62 between the T-tube 6 and the turbine casing 5, high-temperature exhaust gas can be prevented from flowing back into the turbine casing 5 from the T-tube 6 during the active regeneration of the DPF unit 4, which helps to ensure the stability of the device during operation.

[0032] Specifically, the working principle of this invention is as follows: In the conventional purification mode, the exhaust gas first enters the turbine casing 5, driving the turbine body 51 to rotate. Then, the exhaust gas enters the DPF unit 4, where most particulate matter is captured and removed. The pre-purified exhaust gas flows into the connecting cylinder 2, where the atomizing component 3 automatically adjusts and sprays urea solution according to the exhaust gas flow rate. Urea rapidly decomposes into ammonia in the high-temperature exhaust gas. The mixture of exhaust gas and ammonia is divided and turbulent by the first dividing plate 21 and the second dividing plate 22 to achieve uniform mixing. Then, it is guided through the guide shroud 15 to the entire outer surface of the spherical SCR catalyst carrier. The exhaust gas penetrates radially inward from the outer surface of the sphere through the porous SCR catalyst carrier composed of multiple concentric spherical shells 11. In the CR catalyst carrier, nitrogen oxides and ammonia undergo selective catalytic reduction on the catalyst surface, converting into harmless nitrogen and water. The purified gases converge at the center of the sphere and are discharged from the system through the exhaust pipe 12. During this process, the rotation of the turbofan body 51 drives the gear pump 54 to start, causing the oil to circulate in a closed loop and driving the water turbine 55 to generate power. This rotational power is transmitted to each layer of spherical shell 11 through the meshing of the gear set 53 and multiple gear rings 52, driving all spherical shells 11 to rotate slowly. The relative motion between the spherical shells 11 continuously scrapes the gaps, achieving online self-cleaning and preventing catalyst blockage.

[0033] When DPF regeneration is required, the electronically controlled valve changes the passage of the three-way pipe 61, allowing the ultra-high temperature exhaust gas from the engine to bypass the turbofan casing 5 and directly enter the front end of the DPF unit 4 through the T-shaped pipe 6, providing high temperature to burn off carbon deposits. After regeneration is completed, the system returns to the normal purification mode.

[0034] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A waste gas purification device for heavy-duty gas turbines, comprising a housing (1), characterized in that: An SCR catalyst carrier is installed inside the outer shell (1). The SCR catalyst carrier is configured as a spherical structure and a porous honeycomb structure. The outer surface of the SCR catalyst carrier is configured as an air inlet, and the center position of the SCR catalyst carrier is configured as an air outlet. An exhaust pipe (12) is fixedly connected to the center position of the SCR catalyst carrier, and the exhaust pipe (12) is connected to the rear end of the outer shell (1). A connecting cylinder (2) is fixedly connected to the front end of the outer shell (1), and an atomizing component (3) is installed inside the connecting cylinder (2). A DPF unit (4) is fixedly connected to the front end of the connecting cylinder (2).

2. The exhaust gas purification equipment for heavy-duty gas turbines according to claim 1, characterized in that: The outer shell (1) is fixedly installed with a support (13) located in front of the SCR catalyst carrier, and the support (13) has a plurality of evenly distributed diversion holes (14). The support (13) is fixedly installed with a flow guide (15) corresponding to and communicating with the plurality of diversion holes (14), and the rear end of the flow guide (15) is evenly distributed on the outer surface of the SCR catalyst carrier.

3. The exhaust gas purification device for heavy-duty gas turbines according to claim 1, characterized in that: The SCR catalyst carrier is composed of multiple nested spherical shells (11), the center positions of the multiple spherical shells (11) coincide with each other, and a gap (16) is formed between two adjacent spherical shells (11). The exhaust pipe (12) is fixedly connected to the center position of the innermost spherical shell (11). Multiple nested rotating cylinders (17) are rotatably connected to the outside of the exhaust pipe (12), and the multiple rotating cylinders (17) are fixedly connected to the multiple spherical shells (11) one by one.

4. The exhaust gas purification equipment for heavy-duty gas turbines according to claim 1, characterized in that: The connecting tube (2) is fixedly installed with a first dividing plate (21) located behind the atomizing component (3), and a second dividing plate (22) is fixedly installed behind the first dividing plate (21). The first dividing plate (21) is composed of three partitions evenly distributed around it, and the second dividing plate (22) is composed of six partitions evenly distributed around it.

5. The exhaust gas purification device for heavy-duty gas turbines according to claim 4, characterized in that: The atomizing component (3) includes a delivery pipe (31) fixedly connected to the inner wall of the connecting cylinder (2), and a nozzle (32) located on the central axis inside the connecting cylinder (2) is fixedly connected to the delivery pipe (31), and a nozzle (33) vertically pointing to the center of the first dividing plate (21) is fixedly installed at the rear end of the nozzle (32).

6. The exhaust gas purification device for heavy-duty gas turbines according to claim 5, characterized in that: A rod (34) is slidably inserted into the nozzle (32). A spring (35) for elastic support of the rod (34) is installed inside the nozzle (32). A valve block (36) corresponding to the delivery pipe (31) is fixedly installed at the rear end of the rod (34). A channel (37) connecting the cylindrical surface of the valve block (36) and the nozzle (33) is opened inside the valve block (36). A circular plate (38) is fixedly installed at the front end of the rod (34).

7. The exhaust gas purification device for heavy-duty gas turbines according to claim 3, characterized in that: The front end of the DPF unit (4) is fixedly connected to the turbofan housing (5), and the turbofan body (51) is rotatably installed inside the turbofan housing (5). The rear ends of the multiple rotating cylinders (17) are respectively fixedly installed with interlocking gear rings (52). The outer shell (1) is rotatably installed with a gear set (53) that meshes with the multiple gear rings (52), and the gear set (53) is connected to the rotating shaft of the turbofan body (51) via a transmission.

8. The exhaust gas purification device for heavy-duty gas turbines according to claim 7, characterized in that: A gear pump (54) is fixedly installed on the outside of the turbine housing (5), and the internal shaft of the gear pump (54) is fixedly connected to the shaft of the turbine body (51). A water turbine (55) is fixedly installed inside the outer shell (1). The gear set (53) is connected to the internal shaft of the water turbine (55). The outlet of the gear pump (54) is connected to the inlet of the water turbine (55), and the inlet of the gear pump (54) is connected to the outlet of the water turbine (55).

9. The exhaust gas purification device for heavy-duty gas turbines according to claim 1, characterized in that: A T-shaped pipe (6) is fixedly connected between the front end of the DPF unit (4) and the air outlet of the turbine casing (5). A three-way pipe (61) is fixedly connected between the air inlet of the turbine casing (5) and the remaining end of the T-shaped pipe (6), and an electric control valve is installed inside the three-way pipe (61).

10. The exhaust gas purification device for heavy-duty gas turbines according to claim 9, characterized in that: A one-way valve (62) is fixedly installed between the air outlet of the turbine casing (5) and the T-shaped pipe (6).

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