CN216498581U - Gas turbine unit flue gas denitration spouts ammonia and flue gas integrated device that flow equalizes - Google Patents
Gas turbine unit flue gas denitration spouts ammonia and flue gas integrated device that flow equalizes Download PDFInfo
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- CN216498581U CN216498581U CN202123212353.2U CN202123212353U CN216498581U CN 216498581 U CN216498581 U CN 216498581U CN 202123212353 U CN202123212353 U CN 202123212353U CN 216498581 U CN216498581 U CN 216498581U
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Abstract
The utility model relates to a flue gas denitration ammonia injection and flue gas flow equalization integrated device of a gas turbine unit, which comprises a waste heat boiler, an ammonia injection grid and a porous plate, wherein the waste heat boiler is connected with the ammonia injection grid; the ammonia spraying grid and the porous plate are both positioned in the waste heat boiler, and the porous plate is positioned at the downstream of the ammonia spraying grid; the ammonia-spraying grid comprises an ammonia-spraying grid main pipe, ammonia-spraying grid branch pipes and ammonia-spraying grid spray holes, the ammonia-spraying grid branch pipes are uniformly arranged on two sides of the ammonia-spraying grid main pipe, and the ammonia-spraying grid branch pipes are provided with the ammonia-spraying grid spray holes; the perforated plate is fixed in the waste heat boiler through a supporting beam; the intake pipe is located between ammonia injection grid and the perforated plate, intake pipe and ammonia injection grid intercommunication to the intake pipe is fixed through a supporting beam. The utility model has the beneficial effects that: this patent uses ammonia injection grid and perforated plate coupling, locates ammonia injection grid low reaches with the perforated plate, and the perforated plate both has the effect in uniform velocity field, has the effect in uniform concentration field again.
Description
Technical Field
The patent relates to the field of flue gas treatment, concretely relates to ammonia and flue gas flow equalization integrated device are spouted in denitration of gas turbine unit.
Background
In recent years, with the increasing national environmental standards, the emission of nitrogen oxides from gas turbines has drawn more and more attention. At present, the low-nitrogen combustion technology can only reduce the emission concentration of nitrogen oxides to 30mg/m3On the left and right sides, in order to reach the nitrogen oxide emission standard in corresponding areas, most gas turbine units are additionally provided with SCR denitration devices.
The gas turbine set usually adopts a gas-steam combined cycle power generation technology, an SCR denitration device of the gas turbine set is generally additionally arranged in a gap of a heat exchange module in a waste heat boiler, the selection of space and temperature is limited, the distance between an ammonia injection grid and a catalyst is usually short, and in addition, a flue connected with the waste heat boiler at an outlet flue of a gas turbine has sudden change of section size, so that NH at the inlet of a first-layer catalyst is often caused3/NOxThe concentration field and the flow velocity field of the flue gas can hardly meet the technical requirements of the process.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides an integrated device for denitration, ammonia injection and flue gas flow equalization of flue gas of a gas turbine set.
The integrated device for denitration, ammonia injection and flue gas flow equalization of the flue gas of the gas turbine set comprises a waste heat boiler, an ammonia injection grid and a porous plate; the ammonia spraying grid and the porous plate are both positioned in the waste heat boiler, and the porous plate is positioned at the downstream of the ammonia spraying grid; the ammonia-spraying grid comprises an ammonia-spraying grid main pipe, ammonia-spraying grid branch pipes and ammonia-spraying grid spray holes, the ammonia-spraying grid branch pipes are uniformly arranged on two sides of the ammonia-spraying grid main pipe, and the ammonia-spraying grid branch pipes are provided with the ammonia-spraying grid spray holes; the perforated plate is fixed in the waste heat boiler through a supporting beam; the intake pipe is located between ammonia injection grid and the perforated plate, intake pipe and ammonia injection grid intercommunication to the intake pipe is fixed through a supporting beam.
Preferably, the method comprises the following steps: the waste heat boiler is connected with a chimney at an outlet.
Preferably, the method comprises the following steps: the ammonia injection grid is a rake type ammonia injection grid, and two ends of the ammonia injection grid are fixed on the inner wall of the waste heat boiler; the inner diameter of the main pipe of the ammonia injection grid is 1.0-2.5 times of the inner diameter of the branch pipe of the ammonia injection grid.
Preferably, the method comprises the following steps: the radial section area of the branch pipe of the ammonia injection grid is 3-10 times of the sum of the radial section areas of the spray holes of the ammonia injection grid.
Preferably, the method comprises the following steps: the aperture ratio of the porous plate is 40-60%, and the aperture diameter is phi 20-50 mm.
Preferably, the method comprises the following steps: the distance between the ammonia spraying grid and the porous plate is 600-1200 mm.
Preferably, the method comprises the following steps: the supporting piece on the air inlet pipe is connected with the supporting beam through a connecting piece.
Preferably, the method comprises the following steps: the connecting piece and the supporting beam are both channel steel; the supporting piece is a U-shaped piece, and the ear plates on two sides of the U-shaped piece are connected with the connecting piece through bolts.
Preferably, the method comprises the following steps: the two ends of the supporting beam are fixed on the inner wall of the waste heat boiler through bolts, and the supporting beam is connected with the porous plate through bolts.
The utility model has the beneficial effects that:
1. this patent provides a gas turbine group flue gas denitration spouts ammonia and flue gas integrated device that flow equalizes will spout ammonia grid and perforated plate coupling and use, locates the perforated plate and spout ammonia grid low reaches, and the perforated plate has both had the effect in uniform velocity field, has the effect in uniform concentration field again.
2. The utility model utilizes the supporting beam of the porous plate to fix the air inlet pipe of the ammonia-air mixed gas, can achieve the purpose of saving installation materials, and has reasonable structure and convenient installation.
Drawings
FIG. 1 is a schematic view of an integrated device for denitration, ammonia injection and flue gas flow equalization of flue gas of a gas turbine set;
FIG. 2 is a schematic view of an ammonia injection grid (i.e., a cross-sectional view A-A in FIG. 1);
FIG. 3 is a schematic view of a multi-well plate (i.e., a sectional view B-B in FIG. 1).
Description of reference numerals: the system comprises a waste heat boiler 1, an air inlet pipe 2, an ammonia injection grid main pipe 3, an ammonia injection grid branch pipe 4, an ammonia injection grid spray hole 5, a porous plate 6, a support beam 7, a connecting piece 8 and a support piece 9.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the utility model. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Example one
The embodiment of the application provides a gas turbine group flue gas denitration spouts ammonia and flue gas integrated device that flow equalizes places the perforated plate in the low reaches of spouting the ammonia grid, makes the perforated plate have the dual function in even speed field and concentration field, utilizes the supporting beam of perforated plate to fix the intake pipe of spouting the ammonia grid simultaneously, reaches the purpose of sparingly mounting material.
As shown in fig. 1, 2, and 3, the gas turbine set flue gas denitration ammonia injection and flue gas flow equalization integrated device includes a waste heat boiler 1, an ammonia injection grid, and a porous plate 6. The ammonia spraying grid and the porous plate 6 are both positioned in the waste heat boiler 1, and the porous plate 6 is positioned at the downstream of the ammonia spraying grid; the ammonia-spraying grid comprises an ammonia-spraying grid main pipe 3, ammonia-spraying grid branch pipes 4 and ammonia-spraying grid spray holes 5, the ammonia-spraying grid branch pipes 4 are uniformly arranged on two sides of the ammonia-spraying grid main pipe 3, and the ammonia-spraying grid spray holes 5 are arranged on the ammonia-spraying grid branch pipes 4; the porous plate 6 is fixed inside the waste heat boiler 1 through a support beam 7; intake pipe 2 is located between ammonia injection grid and the perforated plate 6, intake pipe 2 and ammonia injection grid intercommunication to intake pipe 2 is fixed through a supporting beam 7.
The waste heat boiler 1 is connected with a chimney at an outlet.
The ammonia injection grid is a rake type ammonia injection grid, and two ends of the ammonia injection grid are fixed on the inner wall of the waste heat boiler 1; the radial section area of the ammonia injection grid branch pipe 4 is 3-10 times of the sum of the radial section areas of the ammonia injection grid spray holes 5; the inner diameter of the main pipe 3 of the ammonia injection grid is 1.0 to 2.5 times of the inner diameter of the branch pipe 4 of the ammonia injection grid; the direction of the ammonia spraying grid spray holes 5 is the same as the direction of the gas flow.
The aperture ratio of the porous plate 6 is 40-60%, the aperture mode is a circular hole punching mode, the punching direction is the same as the air flow direction, and the aperture range phi is 20-50 mm.
The distance L between the ammonia spraying grid and the porous plate is between 600 and 1200 mm.
The supporting part 9 on the air inlet pipe 2 is connected with the supporting beam 7 through a connecting part 8. Wherein the connecting piece 8 and the supporting beam 7 are both channel steel; the supporting piece 9 is a U-shaped piece, and the ear plates on two sides of the U-shaped piece are connected with the connecting piece 8 through bolts.
Two ends of the supporting beam 7 are fixed on the inner wall of the waste heat boiler 1 through bolts, and the supporting beam 7 is connected with the porous plate 6 through bolts.
Example two
The second embodiment of the application provides a working method of a gas turbine unit flue gas denitration ammonia injection and flue gas flow equalization integrated device, which comprises the following steps:
s1, enabling the flue gas to enter the waste heat boiler 1, and spraying the ammonia-air mixed gas into the waste heat boiler 1 through an air inlet pipe 2, an ammonia spraying grid main pipe 3, an ammonia spraying grid branch pipe 4 and an ammonia spraying grid spray hole 5 in sequence to be mixed with the flue gas;
s2, enabling the mixed gas flow of the ammonia-air mixed gas and the flue gas to collide with the plate wall of the perforated plate 6 for back mixing, and further uniformly mixing the ammonia-air mixed gas and the flue gas;
s3, finally, the air flow passes through the holes of the perforated plate 6, so that the velocity flow field is more uniform.
Compared with the traditional denitration technology that the porous plate is positioned at the upstream of the ammonia spraying grid, the utility model arranges the porous plate at the downstream of the ammonia spraying grid and utilizes the supporting piece of the porous plate to support the air inlet pipe, thereby achieving the purpose of saving materials.
Claims (9)
1. The utility model provides a gas turbine unit flue gas denitration spouts ammonia and flue gas integrated device that flow equalizes which characterized in that: comprises a waste heat boiler (1), an ammonia injection grid and a porous plate (6); the ammonia spraying grid and the porous plate (6) are both positioned in the waste heat boiler (1), and the porous plate (6) is positioned at the downstream of the ammonia spraying grid; the ammonia-spraying grid comprises an ammonia-spraying grid main pipe (3), ammonia-spraying grid branch pipes (4) and ammonia-spraying grid spray holes (5), the ammonia-spraying grid branch pipes (4) are uniformly arranged on two sides of the ammonia-spraying grid main pipe (3), and the ammonia-spraying grid spray holes (5) are formed in the ammonia-spraying grid branch pipes (4); the porous plate (6) is fixed inside the waste heat boiler (1) through a supporting beam (7); the air inlet pipe (2) is positioned between the ammonia spraying grid and the porous plate (6), the air inlet pipe (2) is communicated with the ammonia spraying grid, and the air inlet pipe (2) is fixed through the supporting beam (7).
2. The gas turbine set flue gas denitration ammonia injection and flue gas flow equalization integrated device of claim 1, characterized in that: the waste heat boiler (1) is connected with a chimney through an outlet.
3. The gas turbine set flue gas denitration ammonia injection and flue gas flow equalization integrated device of claim 1, characterized in that: the ammonia injection grid is a rake type ammonia injection grid, and two ends of the ammonia injection grid are fixed on the inner wall of the waste heat boiler (1); the inner diameter of the main pipe (3) of the ammonia injection grid is 1.0-2.5 times of the inner diameter of the branch pipe (4) of the ammonia injection grid.
4. The gas turbine set flue gas denitration ammonia injection and flue gas flow equalization integrated device of claim 3, characterized in that: the radial section area of the ammonia injection grid branch pipe (4) is 3-10 times of the sum of the radial section areas of the ammonia injection grid spray holes (5).
5. The gas turbine set flue gas denitration ammonia injection and flue gas flow equalization integrated device of claim 1, characterized in that: the aperture ratio of the porous plate (6) is 40-60%, and the aperture diameter is phi 20-50 mm.
6. The gas turbine set flue gas denitration ammonia injection and flue gas flow equalization integrated device of claim 1, characterized in that: the distance between the ammonia spraying grid and the porous plate is 600-1200 mm.
7. The gas turbine set flue gas denitration ammonia injection and flue gas flow equalization integrated device of claim 1, characterized in that: and a supporting piece (9) on the air inlet pipe (2) is connected with the supporting beam (7) through a connecting piece (8).
8. The gas turbine set flue gas denitration ammonia injection and flue gas flow equalization integrated device of claim 7, characterized in that: the connecting piece (8) and the supporting beam (7) are both channel steel; the supporting piece (9) is a U-shaped piece, and the ear plates on two sides of the U-shaped piece are connected with the connecting piece (8) through bolts.
9. The gas turbine set flue gas denitration ammonia injection and flue gas flow equalization integrated device of claim 1, characterized in that: two ends of the supporting beam (7) are fixed on the inner wall of the waste heat boiler (1) through bolts, and the supporting beam (7) is connected with the porous plate (6) through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123212353.2U CN216498581U (en) | 2021-12-20 | 2021-12-20 | Gas turbine unit flue gas denitration spouts ammonia and flue gas integrated device that flow equalizes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123212353.2U CN216498581U (en) | 2021-12-20 | 2021-12-20 | Gas turbine unit flue gas denitration spouts ammonia and flue gas integrated device that flow equalizes |
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| Publication Number | Publication Date |
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| CN216498581U true CN216498581U (en) | 2022-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123212353.2U Active CN216498581U (en) | 2021-12-20 | 2021-12-20 | Gas turbine unit flue gas denitration spouts ammonia and flue gas integrated device that flow equalizes |
Country Status (1)
| Country | Link |
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| CN (1) | CN216498581U (en) |
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2021
- 2021-12-20 CN CN202123212353.2U patent/CN216498581U/en active Active
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