CN110594728A - Oxygen-enriched pulverized coal burner and combustion method based on suction injection - Google Patents
Oxygen-enriched pulverized coal burner and combustion method based on suction injection Download PDFInfo
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- CN110594728A CN110594728A CN201910891896.XA CN201910891896A CN110594728A CN 110594728 A CN110594728 A CN 110594728A CN 201910891896 A CN201910891896 A CN 201910891896A CN 110594728 A CN110594728 A CN 110594728A
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- Prior art keywords
- pulverized coal
- oxygen
- pipeline
- pure oxygen
- flue gas
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- 239000003245 coal Substances 0.000 title claims abstract description 37
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 239000001301 oxygen Substances 0.000 title claims abstract description 32
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 32
- 238000009841 combustion method Methods 0.000 title claims abstract description 8
- 238000002347 injection Methods 0.000 title claims abstract description 8
- 239000007924 injection Substances 0.000 title claims abstract description 8
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 44
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000003546 flue gas Substances 0.000 claims abstract description 41
- 238000002485 combustion reaction Methods 0.000 claims abstract description 26
- 239000000446 fuel Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 5
- 239000000779 smoke Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 230000003111 delayed effect Effects 0.000 abstract description 3
- 230000001737 promoting effect Effects 0.000 abstract 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/08—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for reducing temperature in combustion chamber, e.g. for protecting walls of combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
- F23L7/007—Supplying oxygen or oxygen-enriched air
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/32—Direct CO2 mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses an oxygen-enriched pulverized coal burner and a combustion method based on suction injection. The combustor comprises a primary air pipeline, an adjusting air pipeline, a precombustion chamber and a nozzle. The primary air pipeline and the adjusting air pipeline are eccentrically arranged at the inlet end of the precombustion chamber. The precombustion chamber is arranged at the inlet end of the nozzle and is coaxial with the nozzle. The nozzle inlet end is also provided with a pure oxygen pipeline which is arranged outside the precombustion chamber. The pure oxygen pipeline is sleeved with a circulating flue gas pipeline. The primary air is led into the precombustion chamber through the primary air pipeline with the pulverized coal to form eccentric jet flow and local entrainment. Adjusting air introduced into the air pipeline to ensure that the pulverized coal is partially pyrolyzed and combusted in the precombustion chamber to form mixed fuel air entering the nozzle. The high-speed pure oxygen is wrapped and clamped by the circulating flue gas, so that the mixed fuel air is combusted and delayed, and flue gas entrainment in the furnace is formed to reduce the flame temperature peak value. The invention has the advantages of promoting the combustion of the pulverized coal and simultaneously ensuring the safety of the heating surface, and the like.
Description
Technical Field
The invention relates to an oxygen-enriched pulverized coal burner and a combustion method based on suction injection thereof, belonging to the technical field of combustion.
Background
Greenhouse gas emissions are a hot spot of widespread concern in today's international society. The combination of oxygen-enriched combustion technology and carbon dioxide capture and sealing technology can effectively control the carbon dioxide emission of coal-fired power stations. The oxyfuel combustion technology is a combustion mode in which pure oxygen obtained from an air separation unit is mixed with recycled flue gas and then used as an oxidant to replace air. The oxygen-enriched combustion technology enriches carbon dioxide in the tail gas, and is convenient for subsequent separation and capture. However, due to the difference in physical and chemical properties between carbon dioxide and nitrogen, problems such as delay of ignition, low flame temperature, etc. occur in oxyfuel combustion. On the other hand, as the circulating flue gas needs to utilize an additional fan, the plant power consumption rate is increased, and the overall efficiency of the power plant is reduced. Therefore, the economic and environment-friendly technical route is as follows: the method has the advantages that the amount of recycled flue gas is reduced, the oxygen concentration at the inlet is increased, the flame temperature is controlled not to be too high, and the safety of a heating surface is guaranteed. Under the background, the development of a novel oxygen-enriched pulverized coal burner is an urgent need of coal-fired power generation enterprises.
The existing technologies cannot solve the above problems at the same time. For example, the existing oxygen-enriched coal-fired boiler generally adopts a method of increasing the inlet oxygen concentration from 21% to 30%, and the problems of delayed ignition, low flame temperature, high energy consumption of a flue gas circulating fan and the like are solved. However, the ignition time is still longer than that of an air coal-fired boiler, the energy consumption of the circulating fan is still large, and the efficiency of a power plant is still low. If the inlet oxygen concentration is further increased, although the problems can be solved, the peak heat flow density in the furnace is too high, the safety of the heating surface is seriously threatened, and the production requirement cannot be met.
Aiming at the engineering background, the oxygen-enriched pulverized coal combustion technology which can be suitable for the working condition of high oxygen concentration is researched and developed, so that the technical problem which needs to be solved urgently is solved, the ignition characteristic and flame temperature of oxygen-enriched combustion can be ensured successfully, and the combustion stability and the heat exchange in the furnace are facilitated; meanwhile, the energy consumption of the flue gas circulating fan can be reduced, the overall efficiency of a power plant is improved, and good economic benefits are obtained.
Disclosure of Invention
The invention aims to provide an oxygen-enriched pulverized coal burner and a combustion method based on suction injection, on one hand, pulverized coal jet flow is promoted to be heated through entrainment of eccentric primary air in a precombustion chamber, so that the ignition distance is shortened; on the other hand, the temperature in the furnace is more uniform through the entrainment of the high-speed secondary air, and the peak heat flux density can not be too high even under the condition of higher oxygen concentration.
The invention is realized by the following technical scheme:
an oxygen-enriched pulverized coal burner comprises a primary air pipeline, an adjusting air pipeline, a precombustion chamber and a nozzle; the nozzle is used as the outlet end of the burner and is arranged in the hearth; the primary air pipeline and the adjusting air pipeline are eccentrically arranged at the inlet end of the precombustion chamber; the pre-combustion chamber is arranged at the inlet end of the nozzle and is coaxially arranged with the nozzle; the nozzle inlet end is further provided with a pure oxygen pipeline, and the pure oxygen pipeline is arranged on the outer side of the pre-combustion chamber.
In the technical scheme, the two pure oxygen pipelines are symmetrically arranged at the nozzle inlet end.
In the technical scheme, the combustor further comprises a circulating flue gas pipeline, wherein the circulating flue gas pipeline is arranged on the periphery of the pure oxygen pipeline in a sleeve mode and is arranged in a concentric circle with the pure oxygen pipeline.
In the technical scheme, the sectional area of the circulating flue gas pipeline is 2-5 times of that of the pure oxygen pipeline.
In the technical scheme, the cross section area of the nozzle is 10-20 times of that of the precombustion chamber; the cross section of the precombustion chamber is 2-10 times of the cross section of the adjusting air duct.
In the technical scheme, the sectional area of the precombustion chamber is 10-40 times of that of the circulating flue gas pipeline.
In the technical scheme, the distance from the central axis of the circulating flue gas pipeline to the central axis of the precombustion chamber is 2-6 times of the radius of the precombustion chamber.
An oxygen-enriched pulverized coal burner combustion method based on suction injection comprises the following steps:
the primary air is led into the pre-combustion chamber through the primary air pipeline with the pulverized coal, and partial entrainment is formed in the pre-combustion chamber and an outlet thereof by means of the eccentric jet flow of the primary air in the pre-combustion chamber, so that the pulverized coal is heated and ignited;
introducing a proper amount of air into the pre-combustion chamber through an adjusting air pipeline to serve as adjusting air, so that the pulverized coal is partially pyrolyzed and combusted in the pre-combustion chamber to form mixed fuel air to enter a nozzle;
the pure oxygen is sprayed into the nozzle from the pure oxygen pipeline at the speed of 100-200 m/s, and the pure oxygen is used as secondary air to further combust mixed fuel air and form smoke entrainment in the furnace to reduce the flame temperature peak value.
In the above technical solution, the method further includes:
the pure oxygen is sprayed into the nozzle from the pure oxygen pipeline at a speed of 100-200 m/s, and meanwhile, the circulating flue gas is sprayed into the nozzle through the circulating flue gas pipeline to clamp and dilute the pure oxygen, so that the secondary air formed by the pure oxygen and the circulating flue gas is used for delaying the combustion of the mixed fuel air, and the flue gas entrainment in the furnace is formed to reduce the flame temperature peak value.
The invention has the following advantages and beneficial effects: the entrainment of the biased primary air in the precombustion chamber can promote the heating of the pulverized coal jet by the high-temperature flue gas and shorten the ignition distance. Secondary air formed by circulating flue gas and pure oxygen is sprayed into the upper side and the lower side of the precombustion chamber at a high speed, so that a large amount of flue gas in the furnace is sucked, the peak heat flow density cannot be too high even under the working condition of high oxygen concentration, and the safety of a heating surface is guaranteed.
Drawings
FIG. 1 is a schematic view of an oxygen-enriched pulverized coal burner according to the present invention.
In the figure: 1-primary air duct; 2-adjusting an air duct; 3-a precombustion chamber; 4-a pure oxygen pipeline; 5-circulating flue gas pipeline; 6-nozzle; 7-refractory material; 8-hearth.
Detailed Description
The following describes the embodiments and operation of the present invention with reference to the accompanying drawings.
The terms of orientation such as up, down, left, right, front, and rear in the present specification are established based on the positional relationship shown in the drawings. The corresponding positional relationship may also vary depending on the drawings, and therefore, should not be construed as limiting the scope of protection.
As shown in FIG. 1, an oxygen-enriched pulverized coal burner includes a primary air duct 1, a pilot air duct 2, a precombustion chamber 3, and a nozzle 6. The outlet end of the burner of the nozzle 6 is arranged in the hearth 8. The primary air duct 1 and the adjusting air duct 2 are eccentrically arranged at the inlet end of the precombustion chamber 3. The precombustion chamber 3 is arranged at the inlet end of the nozzle 6 and is coaxially arranged with the nozzle 6, and the two are connected through a flange or welded. The sectional area of the nozzle 6 is 10-20 times of that of the precombustion chamber 3. The sectional area of the precombustion chamber 3 is 2-10 times of the sectional area of the adjusting air duct 2.
The inlet end of the nozzle 6 is also provided with a pure oxygen pipeline 4, and the pure oxygen pipeline 4 is arranged outside the precombustion chamber 3. As an optimized technical scheme, two pure oxygen pipelines 4 are arranged and symmetrically arranged at the inlet end of the nozzle 6.
The periphery of the pure oxygen pipeline 4 is also provided with a circulating flue gas pipeline 5, and the circulating flue gas pipeline 5 is arranged in a sleeve mode and is arranged in a concentric circle with the pure oxygen pipeline 4. The sectional area of the circulating flue gas pipeline 5 is 2-5 times of that of the pure oxygen pipeline 4.
The sectional area of the precombustion chamber 3 is 10-40 times of that of the circulating flue gas pipeline 5. The distance between the central axis of the circulating flue gas pipeline 5 and the central axis of the precombustion chamber 3 is 2-6 times of the radius of the precombustion chamber 3.
The primary air is led into the precombustion chamber 3 through the primary air pipeline 1 with the pulverized coal, and due to the eccentric arrangement of the primary air pipeline 1, the primary air is in an eccentric jet flow in the precombustion chamber, so that local entrainment is formed in the precombustion chamber 3 and an outlet of the precombustion chamber, and the pulverized coal is promoted to be heated and fired.
And a proper amount of air is introduced into the precombustion chamber 3 through the adjusting air pipeline 2 to be used as adjusting air, so that the pulverized coal is partially pyrolyzed and combusted in the precombustion chamber 3. The combustion of the pulverized coal is in the form of a micro-fire star instead of a distinct flame. So that both a good ignition quality is ensured and an excessively high combustion temperature in the prechamber 3 is avoided. The partial pyrolyzed and combusted pulverized coal, primary air, adjusting air, pyrolysis gas and combustion flue gas form mixed fuel air to enter the nozzle 6.
The pure oxygen is sprayed into the nozzle 6 from the pure oxygen pipeline 4 at a speed of 100-200 m/s, and meanwhile, the circulating flue gas is sprayed into the nozzle through the circulating flue gas pipeline 5 to clamp and dilute the pure oxygen. At the moment, the circulating flue gas wraps pure oxygen, so that the mixing of oxygen of secondary air and mixed fuel air is delayed; the high-speed jet flow of the secondary air causes strong entrainment of flue gas in the furnace, and controls the peak value of flame temperature. Therefore, even under the working condition of high oxygen concentration, the combustion intensity can be effectively controlled, and the safety of the heating surface is guaranteed.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An oxygen-rich pulverized coal burner, which can be arranged in a furnace (8), characterized in that the burner comprises a primary air duct (1), an adjusting air duct (2), a precombustion chamber (3) and a nozzle (6); the nozzle (6) is arranged in the hearth (8) as the outlet end of the burner; the primary air pipeline (1) and the adjusting air pipeline (2) are eccentrically arranged at the inlet end of the precombustion chamber (3); the pre-combustion chamber (3) is arranged at the inlet end of the nozzle (6) and is coaxially arranged with the nozzle (6); the inlet end of the nozzle (6) is also provided with a pure oxygen pipeline (4), and the pure oxygen pipeline (4) is arranged on the outer side of the precombustion chamber (3).
2. An oxygen-enriched pulverized coal burner as claimed in claim 1, characterized in that said pure oxygen ducts (4) are provided in two, symmetrically at the inlet end of said nozzle (6).
3. An oxygen-enriched pulverized coal burner as claimed in claim 1 or 2, characterized in that the burner further comprises a circulating flue gas duct (5), the circulating flue gas duct (5) being telescopically arranged at the periphery of the pure oxygen duct (4) concentrically with the pure oxygen duct (4).
4. An oxygen-enriched pulverized coal burner as claimed in claim 3, characterized in that the cross-sectional area of the circulating flue gas duct (5) is 2-5 times the cross-sectional area of the pure oxygen duct (4).
5. An oxygen-enriched pulverized coal burner as claimed in claim 1, characterized in that the cross-sectional area of the jet (6) is 10-20 times the cross-sectional area of the prechamber (3); the sectional area of the precombustion chamber (3) is 2-10 times of the sectional area of the adjusting air duct (2).
6. An oxygen-enriched pulverized coal burner as claimed in claim 3, characterized in that the cross-sectional area of the prechamber (3) is 10-40 times the cross-sectional area of the circulating flue gas duct (5).
7. An oxygen-enriched pulverized coal burner as claimed in claim 6, characterized in that the distance from the central axis of the circulating flue gas duct (5) to the central axis of the prechamber (3) is 2-6 times the radius of the prechamber (3).
8. An oxygen-rich pulverized coal burner suction injection-based combustion method using the oxygen-rich pulverized coal burner as claimed in claim 1, characterized in that the method comprises:
the primary air with the pulverized coal is led into the precombustion chamber (3) through the primary air pipeline (1), and the eccentric jet flow of the primary air in the precombustion chamber is used for forming local entrainment in the precombustion chamber (3) and an outlet of the precombustion chamber, so that the pulverized coal is heated and ignited;
a proper amount of air is introduced into the pre-combustion chamber (3) through the adjusting air pipeline (2) to be used as adjusting air, so that the pulverized coal is partially pyrolyzed and combusted in the pre-combustion chamber (3) to form mixed fuel air to enter a nozzle (6);
pure oxygen is injected into the nozzle (6) from the pure oxygen pipeline (4) at a speed of 100-200 m/s, and the pure oxygen is used as secondary air to further combust mixed fuel air and form smoke entrainment in the furnace to reduce the flame temperature peak value.
9. The pulverized coal burner combustion method based on suction injection as claimed in claim 8, characterized in that the burner further comprises a circulating flue gas duct (5), the circulating flue gas duct (5) is telescopically arranged at the periphery of the pure oxygen duct (4) and is arranged in a concentric circle with the pure oxygen duct (4); the method further comprises the following steps:
the pure oxygen is sprayed into the nozzle (6) from the pure oxygen pipeline (4) at a speed of 100-200 m/s, and meanwhile, the circulating flue gas is sprayed in through the circulating flue gas pipeline (5) to clamp and dilute the pure oxygen, so that the secondary air formed by the pure oxygen and the circulating flue gas is used for delaying the combustion of the mixed fuel air, and the flue gas entrainment in the furnace is formed to reduce the flame temperature peak value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910891896.XA CN110594728A (en) | 2019-09-20 | 2019-09-20 | Oxygen-enriched pulverized coal burner and combustion method based on suction injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910891896.XA CN110594728A (en) | 2019-09-20 | 2019-09-20 | Oxygen-enriched pulverized coal burner and combustion method based on suction injection |
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| Publication Number | Publication Date |
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| CN110594728A true CN110594728A (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910891896.XA Pending CN110594728A (en) | 2019-09-20 | 2019-09-20 | Oxygen-enriched pulverized coal burner and combustion method based on suction injection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114659103A (en) * | 2022-04-11 | 2022-06-24 | 西安热工研究院有限公司 | Flue gas recirculation oxygen boosting combustor suitable for degree of depth peak regulation |
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| CN211372394U (en) * | 2019-09-20 | 2020-08-28 | 清华大学 | Oxygen-enriched pulverized coal burner |
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| CN114659103A (en) * | 2022-04-11 | 2022-06-24 | 西安热工研究院有限公司 | Flue gas recirculation oxygen boosting combustor suitable for degree of depth peak regulation |
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