Reducing agent uniform distribution device suitable for super-large section

Abstract

The utility model discloses a reducing agent uniform distribution device suitable for a super-large section, which is arranged in a waste heat boiler of a gas turbine and comprises a group of reducing agent delivery pipes, a group of distribution pipes, a group of distribution pipes and a group of fixed connecting plates, and the reducing agent delivery pipes and the distribution pipes vertically penetrate through the group of fixed connecting plates which are uniformly arranged at intervals. A group of distribution pipes used for distributing a reducing agent in the reducing agent conveying pipe into the distribution pipe are vertically arranged between the reducing agent conveying pipe and the distribution pipe at intervals, a plurality of first distribution branch pipes are arranged on one side of each distribution pipe, and each first distribution branch pipe is correspondingly communicated with each distribution pipe; a second distribution branch pipe is arranged on the other side of each distribution pipe, and each second distribution branch pipe is correspondingly communicated with one reducing agent conveying pipe. According to the utility model, the functions of medium conveying and uniform distribution of a reducing agent are played, the material consumption is reduced, the overall design load is reduced, the smoke blocking area in the waste heat boiler is small, the wind resistance is reduced, and the energy-saving effect is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of gas turbine flue gas denitrification technology, specifically relating to a reducing agent uniform distribution device suitable for ultra-large cross-sections. Background Art

[0002] A gas turbine is a device that uses high-temperature, high-pressure gas produced by fuel combustion as the working fluid. This gas rotates a turbine, converting the kinetic energy of the gas into mechanical energy. Gas turbines offer advantages such as high efficiency, high power output, small size, low investment, low operating costs, and long lifespan. They can start quickly without external power, have good mobility, and are used in power grids to drive peak loads and as emergency backups, effectively ensuring the safe operation of the grid. Furthermore, gas turbines do not emit pollutants such as SO2 or particulate matter during operation, making them widely used in the power generation industry and considered a clean energy source.

[0003] However, due to the high-temperature combustion environment, NOx emissions are unavoidable. Conventional methods employ low-NOx burner technology to control NOx emissions to 50 mg / m³. 3 As environmental emission standards become increasingly stringent, the emission of NOx from gas turbine flue gas is receiving growing attention. The demand for NOx removal from gas turbines is constantly increasing, and distributing a limited amount of reducing agent evenly across the large cross-section of the waste heat boiler within a limited installation space presents a significant technical challenge. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this invention is to provide a reducing agent uniform distribution device suitable for ultra-large cross-sections.

[0005] The specific technical solution is as follows:

[0006] A reducing agent uniform distribution device suitable for ultra-large cross-sections is installed in a gas turbine waste heat boiler. It includes a set of reducing agent conveying pipes, a set of distribution pipes, a set of sub-distribution pipes, and a set of fixed connecting plates. The reducing agent conveying pipes and distribution pipes are vertically installed on a set of fixed connecting plates that are evenly spaced. A set of distribution pipes, used to distribute the reducing agent in the reducing agent conveying pipes into the distribution pipes, is vertically spaced between the reducing agent conveying pipes and the distribution pipes. Each distribution pipe has multiple first distribution branch pipes on one side, and each first distribution branch pipe is connected to each distribution pipe. Each distribution pipe has a second distribution branch pipe on the other side, and each second distribution branch pipe is connected to one of the reducing agent conveying pipes.

[0007] Furthermore, a set of reducing agent delivery pipes includes a support delivery pipe and a stepped delivery pipe. The number of support delivery pipes is 3-5, and the length of the support delivery pipes is equal to that of the distribution pipes. Each stepped delivery pipe extends from top to bottom, and its end is connected to one of the second distribution branches.

[0008] Furthermore, nozzles are evenly distributed on the distribution tube, and the inner diameter of the distribution tube is 2-4 times the inner diameter of the nozzles.

[0009] Furthermore, the inner diameter of the distribution pipe is 2-4 times that of the inner diameter of the first and second distribution branches.

[0010] Furthermore, the upper end of the reducing agent delivery pipe is open, and the lower end is sealed; the upper and lower ends of the distribution pipe are sealed; and both ends of the distribution pipe are sealed.

[0011] Furthermore, the upper end of the reducing agent delivery pipe is connected to the reducing agent manifold via a feeding pipe, and a regulating valve is provided on the feeding pipe.

[0012] The beneficial effects of this utility model are as follows:

[0013] The conveying pipe, distribution pipe, and distribution pipe of this utility model not only play the role of conveying the medium and uniformly distributing the reducing agent, but also serve as structural strength support, reducing material usage and overall design load. The reducing agent distribution device has a small flue gas obstruction area in the waste heat boiler, reducing wind resistance and achieving energy-saving effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the flow chart structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the reducing agent distribution device;

[0016] Figure 3 This is a magnified view of the details at point A;

[0017] Figure 4 This is a magnified view of the details at point B.

[0018] In the diagram: 1. Waste heat boiler from gas turbine; 2. Reducing agent conveying pipe; 21. Supported conveying pipe; 22. Stepped conveying pipe; 3. Distribution pipe; 31. Nozzle; 4. Distribution pipe; 41. First distribution branch pipe; 42. Second distribution branch pipe; 5. Fixed connecting plate; 6. Feeding pipe; 7. Reducing agent header; 8. Regulating valve. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited thereto.

[0020] like Figures 2 to 4As shown, a reducing agent uniform distribution device suitable for ultra-large cross-sections includes a set of reducing agent delivery pipes 2, a set of distribution pipes 3, a set of allocation pipes 4, and a set of fixed connecting plates 5. The reducing agent delivery pipes 2 and distribution pipes 3 are vertically installed on a set of fixed connecting plates 5 evenly spaced apart. All reducing agent delivery pipes 2 are parallel to each other, and all distribution pipes 3 are parallel to each other. The reducing agent delivery pipes 2 and distribution pipes 3 are perpendicular to the fixed connecting plates 5. A set of allocation pipes 4, used to distribute the reducing agent in the reducing agent delivery pipes 2 into the distribution pipes 3, is vertically spaced between the reducing agent delivery pipes 2 and distribution pipes 3. All reducing agent delivery pipes 2 are evenly located on one side of the allocation pipes 4, and all distribution pipes 3 are evenly located on the other side of the allocation pipes 4. Each allocation pipe 4 has multiple first allocation branch pipes 41 on one side, and each first allocation branch pipe 41 is connected to each distribution pipe 3. The distribution pipes 3 are evenly provided with nozzles 31, and the inner diameter of the distribution pipes 3 is the size of the nozzles 31. The inner diameter of the reducing agent delivery pipe 2 is 2-4 times that of the first distribution pipe 4 and the second distribution pipe 4. Each distribution pipe 4 has a second distribution branch pipe 42 on the other side. Each second distribution branch pipe 42 is connected to one of the supporting delivery pipes 21 or one of the step delivery pipes 22. The supporting delivery pipes 21 are the same length as the distribution pipe 3. Each step delivery pipe 22 extends from top to bottom and its end is connected to one of the second distribution branch pipes 42. That is, after the step delivery pipe 22 is connected to the second distribution branch pipe 42, it does not extend further down, while the supporting delivery pipe 21 continues to extend further down after being connected to the second distribution branch pipe 42, thus providing support for the whole device. The inner diameter of the distribution pipe 4 is 2-4 times that of the inner diameter of the first distribution branch pipe 41 and the second distribution branch pipe 42. The upper end of the reducing agent delivery pipe 2 is open and the lower end is sealed. The upper and lower ends of the distribution pipe 3 are sealed. Both ends of the distribution pipe 4 are sealed.

[0021] like Figure 1 As shown, the reducing agent distribution device is installed inside the gas turbine waste heat boiler 1. The upper end of the reducing agent conveying pipe 2 is connected to the reducing agent header 7 through the feeding pipe 6. The feeding pipe 6 is equipped with a regulating valve 8. After the denitrification reducing agent is prepared, it enters the reducing agent conveying pipe 2 through the reducing agent header 7 and the feeding pipe 6 in sequence, and is then distributed to the distribution pipe 3 by the distribution pipe 4. It is then sprayed out by the nozzle 31 and evenly distributed inside the gas turbine waste heat boiler 1, so that the denitrification reducing agent and the flue gas are fully mixed, which facilitates the smooth reduction and removal of NOx when passing through the denitrification catalyst.

Claims

1. A reducing agent uniform distribution device suitable for ultra-large cross-sections, characterized in that, The gas turbine waste heat boiler (1) is equipped with a set of reducing agent conveying pipes (2), a set of distribution pipes (3), a set of distribution pipes (4) and a set of fixed connecting plates (5). The reducing agent conveying pipes (2) and the distribution pipes (3) are vertically installed on a set of fixed connecting plates (5) that are evenly spaced. A set of distribution pipes (4) is vertically spaced between the reducing agent conveying pipes (2) and the distribution pipes (3). Each distribution pipe (4) has multiple first distribution branch pipes (41) on one side. Each first distribution branch pipe (41) is connected to each distribution pipe (3). Each distribution pipe (4) has a second distribution branch pipe (42) on the other side. Each second distribution branch pipe (42) is connected to one of the reducing agent conveying pipes (2). A set of reducing agent delivery pipes (2) includes a support delivery pipe (21) and a stepped delivery pipe (22). The number of support delivery pipes (21) is 3-5. The support delivery pipes (21) are equal in length to the distribution pipes (3). Each stepped delivery pipe (22) extends from top to bottom and its end is connected to one of the second distribution branches (42).

2. The reducing agent uniform distribution device suitable for ultra-large cross-sections as described in claim 1, characterized in that, The distribution pipe (3) is uniformly provided with nozzles (31), and the inner diameter of the distribution pipe (3) is 2-4 times the inner diameter of the nozzles (31).

3. The reducing agent uniform distribution device suitable for ultra-large cross-sections as described in claim 2, characterized in that, The inner diameter of the distribution pipe (4) is 2-4 times the inner diameter of the first distribution branch pipe (41) and the second distribution branch pipe (42).

4. The reducing agent uniform distribution device suitable for ultra-large cross-sections as described in claim 2, characterized in that, The upper end of the reducing agent delivery pipe (2) is open and the lower end is sealed; the upper and lower ends of the distribution pipe (3) are sealed; and both ends of the distribution pipe (4) are sealed.

5. The reducing agent uniform distribution device suitable for ultra-large cross-sections as described in claim 3, characterized in that, The upper port of the reducing agent delivery pipe (2) is connected to the reducing agent manifold (7) through the feeding pipe (6), and the feeding pipe (6) is equipped with a regulating valve (8).

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