CN107433131B - Gas turbine denitration ammonia injection device and gas turbine - Google Patents
Gas turbine denitration ammonia injection device and gas turbine Download PDFInfo
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- CN107433131B CN107433131B CN201710697093.1A CN201710697093A CN107433131B CN 107433131 B CN107433131 B CN 107433131B CN 201710697093 A CN201710697093 A CN 201710697093A CN 107433131 B CN107433131 B CN 107433131B
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- flange
- atomization
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 32
- 238000002347 injection Methods 0.000 title claims description 29
- 239000007924 injection Substances 0.000 title claims description 29
- 238000000889 atomisation Methods 0.000 claims abstract description 38
- 238000005507 spraying Methods 0.000 claims abstract description 32
- 239000007921 spray Substances 0.000 claims abstract description 31
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 29
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 29
- 230000000903 blocking effect Effects 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims description 43
- 238000004321 preservation Methods 0.000 claims description 22
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 4
- 239000007789 gas Substances 0.000 abstract description 39
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 30
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 9
- 239000003546 flue gas Substances 0.000 abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000003638 chemical reducing agent Substances 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 9
- 238000009413 insulation Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Exhaust Gas After Treatment (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention relates to a denitration ammonia spraying device of a gas turbine and the gas turbine, wherein the denitration ammonia spraying device comprises a spraying pipe, an atomization air pipe and an atomization spray nozzle, and the atomization air pipe is sleeved outside the spraying pipe and forms an annular cavity with the outer wall of the spraying pipe; the two ends of the spray pipe are respectively an inlet end and an outlet end, the two ends of the atomization air pipe are respectively a blocking end and an opening end, the outlet end and the opening end are flush and are connected with the atomization nozzle, and the inlet end penetrates out of the blocking end; an atomization air inlet communicated with the annular cavity is formed in the position, close to the outlet end, of the side wall of the atomization air pipe. The invention can spray the atomized ammonia water into the exhaust flue of the gas turbine, fully mix the atomized ammonia water with the flue gas, fully react with nitrogen oxides in the exhaust flue of the gas turbine, and effectively reduce the concentration of the nitrogen oxides, thereby enabling the exhaust of the gas turbine to meet the environmental protection requirement.
Description
Technical Field
The invention relates to the technical field of gas turbines, in particular to a gas turbine denitration ammonia injection device and a gas turbine.
Background
Requirements in DB11/847-2011 of emission Standard of atmospheric pollutants of fixed gas turbine in Beijing City, NO in exhaust-heat boiler flue gas from 1 st 7 th 2014 without flue gas denitration device installed in existing gas turbine in Beijing City x Displacement of less than 30mg/Nm 3 . NO in the existing gas turbine fume emission x Most of the displacements do not reach the standard.
Disclosure of Invention
The invention aims to solve the technical problem of providing a gas turbine denitration ammonia injection device and a gas turbine aiming at the defects of the prior art.
The technical scheme for solving the technical problems is as follows: the denitration ammonia spraying device of the gas turbine comprises a spraying pipe, an atomization air pipe and an atomization spray nozzle, wherein the atomization air pipe is sleeved outside the spraying pipe and forms an annular cavity with the outer wall of the spraying pipe; the two ends of the spray pipe are respectively an inlet end and an outlet end, the two ends of the atomization air pipe are respectively a blocking end and an opening end, the outlet end and the opening end are flush and are both connected with the atomization nozzle, and the inlet end penetrates out of the blocking end; an atomization air inlet communicated with the annular cavity is formed in the position, close to the outlet end, of the side wall of the atomization air pipe.
The beneficial effects of the invention are as follows: according to the invention, the spraying pipe, the atomizing air pipe and the atomizing nozzle are arranged, so that ammonia water can be sprayed into the exhaust flue of the gas turbine after being atomized, and the ammonia water can be fully mixed with flue gas to effectively reduce the concentration of nitrogen oxides; the denitration ammonia spraying device can convey reducing agent ammonia water into the tail flue of the gas turbine and spray the reducing agent ammonia water into mist, so that the reducing agent ammonia water can fully react with nitrogen oxides in the exhaust flue of the gas turbine, the nitrogen oxide content in the gas turbine is effectively reduced, and the exhaust of the gas turbine meets the environmental protection requirement.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the device also comprises a cooling air input pipe, wherein the cooling air input pipe is sleeved outside the atomization air pipe and forms a cooling gap with the outer wall of the atomization air pipe, and a cooling air inlet communicated with the cooling gap is formed in the position, close to the inlet end, of the side wall of the cooling air input pipe.
The beneficial effects of adopting the further scheme are as follows: through setting up the cooling air input pipe, can carry out cooling to atomizing air pipe and injection pipe, can avoid aqueous ammonia to gasify because of the high temperature in the injection pipe and form the air lock.
Further, the cooling air input pipe comprises a first input pipe and a second input pipe, and the cooling air inlet is positioned on the first input pipe; one end of the first input pipe is provided with a first flange, and the other end of the first input pipe is provided with a second flange; a third flange is arranged at one end of the second input pipe, the first flange is connected with the position, close to the plugging end, of the atomized air pipe, the second flange is connected with the third flange, and the other end of the second input pipe is close to the opening end; the atomizing nozzle extends out of the second input pipe.
The beneficial effects of adopting the further scheme are as follows: the first input pipe and the second input pipe are arranged and are detachable.
Further, the device also comprises a heat preservation pipe and a guide pipe, wherein the heat preservation pipe is sleeved on the outer side of the second input pipe and forms a protection Wen Jianxi with the second input pipe, and a heat preservation gap is filled with heat preservation materials;
the utility model discloses a spray nozzle, including the insulating tube, the second input tube, the nozzle, the insulating tube one end with second input tube one end fixed connection, the other end of insulating tube is the shutoff end, the insulating tube lateral wall is close to the position of shutoff end has been seted up the spout, the one end cover of stand pipe is established the second input tube is close to on the one end outer wall of spout, its other end welding after the stand pipe is buckled is in on the inner wall of spout, the atomizer is located in the stand pipe and with the spout corresponds the setting.
The beneficial effects of adopting the further scheme are as follows: by arranging the heat preservation pipe and the guide pipe, external high-temperature smoke can be effectively isolated, the temperature rise of the spray pipe is avoided, and the ammonia water is kept in a liquid state before being sprayed; the guide pipe can guarantee the spraying direction of the atomizing nozzle.
Further, the guide pipe comprises a guide section and a positioning section which are integrally connected, the positioning section is sleeved on the second input section and is in sliding connection with the second input section, one end of the guide section is integrally connected with one end of the positioning section, the other end of the guide section is welded on the inner wall of the nozzle, and the side wall, close to the blocking end of the heat preservation pipe, of the guide section is an inclined plane.
The beneficial effects of adopting the further scheme are as follows: by setting the guide section as an inclined plane, residual ammonia water in the guide pipe is avoided.
Further, the spray pipe cooling device further comprises a thermocouple, wherein the thermocouple is positioned in the cooling gap and fixed on the atomization air pipe through a plurality of clamps, and the thermocouple is distributed along the length direction of the spray pipe.
The beneficial effects of adopting the further scheme are as follows: through setting up the thermocouple, can carry out real-time supervision to injection pipe inside temperature.
Further, the device also comprises an air compressor and an ammonia water supply device, wherein the opening end of the atomization air pipe and the cooling air inlet of the cooling air input pipe are respectively communicated with the air compressor, and the ammonia water supply device is communicated with the inlet end of the injection pipe.
The beneficial effects of adopting the further scheme are as follows: through setting up the air compressor machine, conveniently to atomizing air pipe and cooling air pipe in input air.
The gas turbine comprises a plurality of denitration ammonia spraying devices and an exhaust cylinder, wherein a plurality of mounting holes are formed in the side wall of the exhaust cylinder, a spray gun sleeve is welded in each mounting hole, a fourth flange is arranged at one end of each spray gun sleeve, and one end of each spray gun sleeve, provided with the fourth flange, is positioned outside the exhaust cylinder; the denitration ammonia spraying device is inserted into the spray gun sleeve, and the fourth flange is connected with the outer side wall of the denitration ammonia spraying device; one end of the denitration ammonia spraying device, provided with an atomization spray nozzle, is positioned in the exhaust cylinder.
The beneficial effects of the invention are as follows: the gas turbine can atomize the ammonia water serving as the reducing agent in a liquid state and then spray the atomized ammonia water into the exhaust flue of the gas turbine, so that the ammonia water is not gasified before being sprayed out, and the flue gas at each site of the exhaust flue of the gas turbine can be fully and uniformly mixed with the reducing agent by arranging the plurality of denitration ammonia spraying devices, so that reliable equipment guarantee is provided for reducing nitrogen oxides in the flue gas by a direct-injection ammonia reduction method. The gas turbine can also replace the injection pipe on line, and the injection pipe can be pulled out for replacement in emergency in operation, so that the gas turbine is very convenient.
Further, the heat-insulating pipe sealing device further comprises a reinforcing rod, one end of the reinforcing rod is welded on the inner wall of the exhaust cylinder, and the other end of the reinforcing rod is welded on the outer side of the heat-insulating pipe sealing end.
The beneficial effects of adopting the further scheme are as follows: through setting up the stiffener, avoid spouting ammonia device root fracture because of unit vibrations causes.
Drawings
FIG. 1 is a schematic diagram of a front view structure of a denitration ammonia injection device of the present invention;
FIG. 2 is a view of the A-A plane of FIG. 1;
FIG. 3 is an enlarged schematic view of the portion A in FIG. 2;
FIG. 4 is an enlarged schematic view of the portion B in FIG. 2;
FIG. 5 is a view of the B-B side of FIG. 1;
FIG. 6 is a view of the C-C surface of FIG. 2;
FIG. 7 is a schematic perspective view of an exhaust cylinder of a gas turbine according to the present invention;
fig. 8 is an axial side view of the exhaust cylinder of the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. a jet pipe; 2. an atomizing air tube; 21. an annular cavity; 22. an atomizing air inlet; 23. a flange plate; 3. an atomizing nozzle; 4. a cooling air input pipe; 41. a cooling gap; 42. a first input tube; 43. a second input tube; 44. a first flange; 45. a second flange; 46. a third flange; 47. a cooling air inlet; 5. a heat preservation pipe; 51. a spout; 52. thermal insulation gap; 6. a guide tube; 61. a guide section; 62. a positioning section; 7. a thermocouple; 71. a clamp; 8. an exhaust cylinder; 81. a reinforcing rod; 9. a lance sleeve; 91. and a fourth flange.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Example 1
As shown in fig. 1 to 6, the denitration ammonia injection device of a gas turbine of the present embodiment includes an injection pipe 1, an atomization air pipe 2 and an atomization nozzle 3, wherein the atomization air pipe 2 is sleeved outside the injection pipe 1 and forms an annular cavity 21 with the outer wall of the injection pipe 1; the two ends of the spray pipe 1 are respectively an inlet end and an outlet end, the two ends of the atomization air pipe 2 are respectively a blocking end and an opening end, the outlet end and the opening end are flush and are both connected with the atomization nozzle 3, and the inlet end penetrates out from the blocking end; an atomizing air inlet 22 communicated with the annular cavity 21 is formed in the position, close to the outlet end, of the side wall of the atomizing air pipe 2. The flange plate 23 is vertically arranged at the position of the atomizing air pipe 2 close to the blocking end, and the atomizing air pipe 2 vertically penetrates through the center of the flange plate 23.
As shown in fig. 1-6, the present embodiment further includes a cooling air input pipe 4, the cooling air input pipe 4 is sleeved on the outer side of the atomized air pipe 2 and forms a cooling gap 41 with the outer wall of the atomized air pipe 2, and a cooling air inlet 47 communicating with the cooling gap 41 is provided on a position of the side wall of the cooling air input pipe 4 near the inlet end. Through setting up the cooling air input pipe, can carry out cooling to atomizing air pipe and injection pipe, can avoid aqueous ammonia to gasify because of the high temperature in the injection pipe and form the air lock.
As shown in fig. 2 and 3, the cooling air input pipe 4 includes a first input pipe 42 and a second input pipe 43, and the cooling air inlet 47 is located on the first input pipe 42; a first flange 44 is arranged at one end of the first input pipe 42, and a second flange 45 is arranged at the other end; a third flange 46 is arranged at one end of the second input pipe 43, and the first flange 44 is connected with the position of the atomized air pipe 2 close to the plugging end thereof, namely is connected with the flange plate 23 on the atomized air pipe 2 through bolts; the second flange 45 is connected with the third flange 46 through bolts, and the other end of the second input pipe 43 is arranged near the opening end; the atomizer 3 protrudes from the second inlet pipe 43.
As shown in fig. 2-4, the embodiment further includes a heat insulation pipe 5 and a guide pipe 6, the heat insulation pipe 5 is sleeved outside the second input pipe 43 and forms a protection Wen Jianxi with the second input pipe 43, and the heat insulation gap 52 is filled with heat insulation material;
as shown in fig. 2-4, one end of the heat preservation pipe 5 is fixedly connected with one end of the second input pipe 43, the other end of the heat preservation pipe 5 is a plugging end, a nozzle 51 is formed in a position, close to the plugging end, of the side wall of the heat preservation pipe 5, one end of the guide pipe 6 is sleeved on the outer wall, close to the nozzle 51, of one end of the second input pipe 43, the other end of the guide pipe 6 is welded on the inner wall of the nozzle 51 after being bent, and the atomizing nozzle 3 is located in the guide pipe 6 and is correspondingly arranged with the nozzle 51. By arranging the heat preservation pipe and the guide pipe, external high-temperature smoke can be effectively isolated, the temperature rise of the spray pipe is avoided, and the ammonia water is kept in a liquid state before being sprayed; the guide pipe can guarantee the spraying direction of the atomizing nozzle.
As shown in fig. 4, the guide tube 6 of this embodiment includes a guide section 61 and a positioning section 62 that are integrally connected, the positioning section 62 is sleeved on the second input tube 43 and is slidably connected with the second input tube, one end of the guide section 61 is integrally connected with one end of the positioning section 62, the other end of the guide section 61 is welded on the inner wall of the spout 51, and a side wall of the guide section 61, which is close to the sealing end of the insulating tube 5, is an inclined plane. The sliding sleeve joint of the positioning section 62 and the second input pipe 43 can facilitate the second input pipe 43 to be taken out from the heat preservation pipe 5 and replaced, and the guiding section is an inclined plane to avoid residual ammonia water in the guiding pipe.
As shown in fig. 2-4, the present embodiment further includes a thermocouple 7, where the thermocouple 7 is located in the cooling gap 41 and is fixed on the atomized air pipe 2 by a plurality of clips 71, the thermocouple 7 is disposed along the length direction of the injection pipe 1, one end of the thermocouple 7 is disposed near the nozzle 51, and the other end of the thermocouple 7 penetrates out from the flange plate 23; through setting up the thermocouple, can carry out real-time supervision to injection pipe inside temperature.
The embodiment further comprises an air compressor and an ammonia water supply device, wherein the opening end of the atomization air pipe 2 and the cooling air inlet 47 of the cooling air input pipe 4 are respectively communicated with the air compressor, and the ammonia water supply device is communicated with the inlet end of the injection pipe 1. Through setting up the air compressor machine, conveniently to atomizing air pipe and cooling air pipe in input air.
According to the method, the spraying pipe, the atomization air pipe and the atomization nozzle are arranged, so that ammonia water can be sprayed into the exhaust flue of the gas turbine after being atomized, and the ammonia water is fully mixed with flue gas, so that the concentration of nitrogen oxides can be effectively reduced; the denitration ammonia spraying device can convey reducing agent ammonia water into the tail flue of the gas turbine and spray the reducing agent ammonia water into mist, so that the reducing agent ammonia water can fully react with nitrogen oxides in the exhaust flue of the gas turbine, the nitrogen oxide content in the gas turbine is effectively reduced, and the exhaust of the gas turbine meets the environmental protection requirement.
Example 2
As shown in fig. 7 and 8, a gas turbine of this embodiment includes a plurality of denitration ammonia injection devices and an exhaust cylinder 8 as described in embodiment 1, a plurality of mounting holes are formed in a side wall of the exhaust cylinder 8, a lance sleeve 9 is welded in the mounting holes, a fourth flange 91 is disposed at one end of the lance sleeve 9, and one end of the lance sleeve 9 provided with the fourth flange 91 is located outside the exhaust cylinder 8; the denitration ammonia spraying device is inserted into the spray gun sleeve 9, and the fourth flange 91 is connected with the outer side wall of the denitration ammonia spraying device; one end of the denitration ammonia spraying device, provided with the atomizing nozzle 3, is positioned in the exhaust cylinder 8. The fourth flange is specifically connected with the third flange through bolts. The gas turbine of this embodiment can spray the aqueous ammonia that is the reductant in the exhaust flue of gas turbine after atomizing in liquid form, and be unlikely to before aqueous ammonia blowout gasified, and through setting up a plurality of denitration ammonia injection devices, can make the flue gas and the reductant of each site of gas turbine's exhaust flue fully evenly mix, provide reliable equipment guarantee for direct injection ammonia reduction method reduction nitrogen oxide in the flue gas. The gas turbine of this embodiment can also change the injection pipe on line, and the emergency appears in the operation and can take out the injection pipe and change, and is very convenient.
As shown in fig. 7, the present embodiment further includes a reinforcing rod 81, one end of the reinforcing rod 81 is welded to the inner wall of the exhaust cylinder 8, and the other end is welded to the outside of the sealed end of the insulating pipe 5. Through setting up the stiffener, avoid spouting ammonia device root fracture because of unit vibrations causes. One end of the reinforcing rod is directly welded on the inner wall of the exhaust cylinder, and the other end of the reinforcing rod is welded on the outer side of the plugging end of the heat preservation pipe. When the spray pipe is used, if the spray pipe needs to be replaced, the second flange and the third flange can be directly detached, so that the first input pipe, the atomization air pipe and the spray pipe can be taken out from the heat preservation pipe.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (4)
1. The gas turbine is characterized by comprising a plurality of denitration ammonia spraying devices and an exhaust cylinder, wherein each denitration ammonia spraying device comprises a spraying pipe, an atomization air pipe and an atomization spray nozzle, and the atomization air pipe is sleeved outside the spraying pipe and forms an annular cavity with the outer wall of the spraying pipe; the two ends of the spray pipe are respectively an inlet end and an outlet end, the two ends of the atomization air pipe are respectively a blocking end and an opening end, the outlet end and the opening end are flush and are both connected with the atomization nozzle, and the inlet end penetrates out of the blocking end; an atomization air inlet communicated with the annular cavity is formed in the position, close to the outlet end, of the side wall of the atomization air pipe; a flange plate is vertically arranged at the position of the atomizing air pipe close to the plugging end, and the atomizing air pipe vertically penetrates through the center of the flange plate;
the side wall of the exhaust cylinder is provided with a plurality of mounting holes, a spray gun sleeve is welded in each mounting hole, one end of the spray gun sleeve is provided with a fourth flange, and one end of the spray gun sleeve provided with the fourth flange is positioned outside the exhaust cylinder; the denitration ammonia spraying device is inserted into the spray gun sleeve, and the fourth flange is connected with the outer side wall of the denitration ammonia spraying device; one end of the denitration ammonia spraying device, provided with an atomization spray nozzle, is positioned in the exhaust cylinder;
the gas turbine denitration ammonia injection device further comprises a cooling air input pipe, wherein the cooling air input pipe is sleeved outside the atomization air pipe and forms a cooling gap with the outer wall of the atomization air pipe, and a cooling air inlet communicated with the cooling gap is formed in the position, close to the inlet end, of the side wall of the cooling air input pipe;
the cooling air input pipe comprises a first input pipe and a second input pipe, and the cooling air inlet is positioned on the first input pipe; one end of the first input pipe is provided with a first flange, and the other end of the first input pipe is provided with a second flange; a third flange is arranged at one end of the second input pipe, the first flange is connected with the position, close to the plugging end, of the atomized air pipe, the second flange is connected with the third flange, and the other end of the second input pipe is close to the opening end; the atomizing nozzle extends out of the second input pipe;
the gas turbine denitration ammonia spraying device further comprises a heat preservation pipe and a guide pipe, wherein the heat preservation pipe is sleeved on the outer side of the second input pipe and forms a protection Wen Jianxi with the second input pipe, and a heat preservation gap is filled with heat preservation materials; one end of the heat preservation pipe is fixedly connected with one end of the second input pipe, the other end of the heat preservation pipe is a blocking end, a nozzle is arranged on the side wall of the heat preservation pipe close to the blocking end, one end of the guide pipe is sleeved on the outer wall of one end of the second input pipe close to the nozzle, the other end of the guide pipe is welded on the inner wall of the nozzle after being bent, and the atomizing nozzle is positioned in the guide pipe and is arranged corresponding to the nozzle;
the guide pipe comprises a guide section and a positioning section which are integrally connected, the positioning section is sleeved on the second input pipe and is in sliding connection with the second input pipe, one end of the guide section is integrally connected with one end of the positioning section, the other end of the guide section is welded on the inner wall of the nozzle, and the side wall, close to the blocking end of the heat preservation pipe, of the guide section is an inclined plane.
2. The gas turbine of claim 1, further comprising a thermocouple positioned within said cooling gap and secured to said atomizing air tube by a plurality of clips, said thermocouple being disposed along the length of said injection tube.
3. The gas turbine according to claim 1, further comprising an air compressor and an ammonia water supply device, wherein an opening end of the atomizing air pipe and a cooling air inlet of the cooling air input pipe are respectively communicated with the air compressor, and the ammonia water supply device is communicated with an inlet end of the injection pipe.
4. The gas turbine of claim 1, further comprising a reinforcing rod having one end welded to an inner wall of the exhaust cylinder and the other end welded to an outer side of the closed end of the insulating tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710697093.1A CN107433131B (en) | 2017-08-15 | 2017-08-15 | Gas turbine denitration ammonia injection device and gas turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710697093.1A CN107433131B (en) | 2017-08-15 | 2017-08-15 | Gas turbine denitration ammonia injection device and gas turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107433131A CN107433131A (en) | 2017-12-05 |
| CN107433131B true CN107433131B (en) | 2024-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710697093.1A Active CN107433131B (en) | 2017-08-15 | 2017-08-15 | Gas turbine denitration ammonia injection device and gas turbine |
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| Country | Link |
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| CN (1) | CN107433131B (en) |
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| CN107433131A (en) | 2017-12-05 |
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