CN103968373A - Pulverized coal oxygen-rich combustion method and system - Google Patents
Pulverized coal oxygen-rich combustion method and system Download PDFInfo
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- CN103968373A CN103968373A CN201410170889.8A CN201410170889A CN103968373A CN 103968373 A CN103968373 A CN 103968373A CN 201410170889 A CN201410170889 A CN 201410170889A CN 103968373 A CN103968373 A CN 103968373A
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- oxygen
- air
- flue gas
- wind
- secondary air
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- 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
Abstract
The invention discloses a pulverized coal oxygen-rich combustion method. According to the method, based on traditional oxygen-rich combustion CO2 enrichment, oxygen proportions in a primary air and a secondary air are adjusted to ensure that the oxygen concentration of the primary air is higher than the oxygen concentration of the secondary air, wherein the oxygen content of the primary air is about 30-50 %, the oxygen content of the secondary air is 10-25 % and a third air is pure oxygen; oxygen volume flow entering a furnace chamber takes up 25-35 % of total furnace chamber air volume flow; the pulverized coal is carried by the primary air; the proportion of the primary air to the secondary air is (5 %-25 % ) to (95 % - 75 %); the oxygen excess air coefficient is 1.0-1.2. The invention further provides a corresponding pulverized coal oxygen-rich combustion system. According to the pulverized coal oxygen-rich combustion method, the stability of combustion is improved, the temperature distribution in combustion process is changed and the NOX generation is reduced eventually; after the improvement, the thermal utilization efficiency can be increased by 5-15% and generated NOX can be reduced by 15-45 %.
Description
Technical field
The invention belongs to coal-fired boiler combustion field, more specifically, relate to a kind of oxygen-enriched combustion method for pulverized coal and system.The present invention not only can significantly reduce NO in combustion process
xgeneration, and improved the thermal efficiency of burning.
Background technology
Oxygen-enriched combusting refers to that fuel burns under the oxygen-enriched atmosphere higher than air oxygen concentration.Replace the oxidant of air as burning using pure oxygen, to obtain the CO of high concentration
2, partial fume is recycled, to control furnace flame temperature and to maintain suitable heat-transfer character simultaneously.The CO of flue gas middle and high concentration
2be convenient to catch, utilize and bury, thereby reach CO
2the object reducing discharging.But due to the circulation of nitrogenous flue gas and the impact of system air leakage, the nitrogen element in flue gas is constantly accumulated, thereby causes NO in flue gas
xconcentration of emission raises.And, CO
2specific heat capacity is different from nitrogen, and in larger specific heat capacity, the phenomenons such as the interior combustion instability of stove easily appear in burning, affect the efficiency of boiler.
Summary of the invention
The invention provides a kind of oxygen-enriched combustion method for pulverized coal and system thereof, in combustion process, realize CO
2when enrichment, reduce NO
xdischarge, and improve efficiency of combustion, native system is taken into account energy-conservation, CO
2reduction of discharging, NO
xreduce discharging, there is higher comprehensive benefit.
For achieving the above object, according to one aspect of the present invention, provide a kind of oxygen-enriched combustion method for pulverized coal, described method comprises:
By oxygen-enriched combusting produce high temperature, be rich in CO
2flue gas carry out dust removal process through flue gas cleaner, then remove the moisture in flue gas through condenser, under the adjusting of flow controller, be divided into two parts: a part of discharge system obtains the CO of high concentration
2; Remainder injects after pure oxygen through circulating fan, after mixing with coal dust as a wind;
By oxygen-enriched combusting produce high temperature, be rich in CO
2flue gas inject after pure oxygen through booster fan as Secondary Air;
Using pure oxygen as tertiary air;
After a described wind, Secondary Air and tertiary air are mixed, then inject burner hearth by burner, make coal dust at stove chamber inner combustion;
Wherein: in a wind, oxygen concentration will be higher than Secondary Air, a wind oxygen content is 30-50%; Secondary Air oxygen content is 5-25%, the oxygen volume flow that enters burner hearth accounts for the 21-35% that enters the total volumetric flow of gas of burner hearth, the ratio of wind and Secondary Air is (5%-25%): (95%-75%), oxygen excess coefficient is 1.00-1.2.
Preferably, described pure oxygen, is obtained after removal nitrogen by separating air by air-separating plant.
According to another aspect of the present invention, a kind of coal dust oxygen-enriched combustion system is also provided, described system comprises burner hearth, burner, flue gas cleaner, condenser, flow control valve, circulating fan and booster fan, wherein:
Described burner hearth, for mixed wind, Secondary Air and a tertiary air are carried out to oxygen-enriched combusting, produces high temperature, is rich in CO
2flue gas;
Described flue gas cleaner is used for the described high temperature producing after oxygen-enriched combusting, is rich in CO
2flue gas carry out dust removal process;
Described condenser, for described flue gas after dust removal process is carried out to condensation process, is removed the moisture in flue gas;
Described flow controller, for the flue gas after condensation process is regulated, is divided into two parts by flue gas: a part of discharge system obtains the CO of high concentration
2; Remainder injects after pure oxygen through described circulating fan, after mixing with coal dust as a wind;
Described booster fan for high temperature that described oxygen-enriched combusting is produced, be rich in CO
2flue gas inject after pure oxygen and carry out supercharging as Secondary Air;
Using pure oxygen as tertiary air;
After a described wind, Secondary Air and tertiary air mix, then inject burner hearth by burner, make coal dust at stove chamber inner combustion;
Wherein: in a wind, oxygen concentration will be higher than oxygen concentration in Secondary Air, a wind oxygen content is 30-50%; Secondary Air oxygen content is 5-25%, the oxygen volume flow that enters burner hearth accounts for the 21-35% that enters the total volumetric flow of gas of burner hearth, the ratio of wind and Secondary Air is (5%-25%): (95%-75%), oxygen excess coefficient is 1.00-1.2.
Further, described system also comprises air-separating plant, and described air-separating plant, for separating of air, obtains pure oxygen after removal nitrogen.
In general, the above technical scheme of conceiving by the present invention compared with prior art, has following beneficial effect:
1, replace the oxidant of air as burning to separate the pure oxygen obtaining through air separator, like this, in the flue gas that burning generates, main component only has water and CO
2, not containing N
2, the flue gas after purification only needs condensation to remove aqueous water can to obtain the CO of high concentration
2, be convenient to catch, utilize and bury, thereby reach CO
2the object reducing discharging, meets the theory of low-carbon energy-saving.
2, in the present invention, because the oxygen concentration of a wind is higher than the oxygen concentration of Secondary Air, make coal dust in the time of initial combustion, contact more oxygen, changed burned flame structure, optimized the Temperature Distribution in burner hearth, effectively suppressed NO
xgeneration.Be equipped with a rational Secondary Air ratio, stability and the burn-off rate of fuel also increase, NO thus
xthe more traditional oxygen-enriched combusting mode of growing amount greatly reduce.According to the difference of a Secondary Air oxygen content and ratio, NO
xgeneration can reduce 15-45%, has effectively improved NO in oxygen-enriched combusting
xthe defect that growing amount is too high.
Brief description of the drawings
Fig. 1 is coal dust oxygen-enriched combustion system schematic diagram in the present invention.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.In addition,, in each embodiment of described the present invention, involved technical characterictic just can combine mutually as long as do not form each other conflict.
Oxygen-enriched combusting method provided by the invention, is by the high temperature of oxygen-enriched combusting generation, is rich in CO
2flue gas mix with pure oxygen and replace air as combustion-supporting gas, then inject burner hearth by burner, make coal dust at stove chamber inner combustion.As shown in Figure 1, the high concentration CO that burning produces
2flue gas is divided into two strands, is called respectively wind circulating flue gas and Secondary Air circulating flue gas.Wherein, one time wind circulating flue gas carries out dust removal process through flue gas cleaner, remove the moisture in flue gas through condenser again, under the adjusting of flow controller, be divided into two parts, a part is injected after pure oxygen through circulating fan, after mixing with coal dust, enter burner hearth as a wind, remainder discharge system obtains the CO of high concentration
2, be convenient to further utilize or bury.Secondary Air circulating flue gas enters burner hearth through booster fan as Secondary Air after injecting pure oxygen.Tertiary air is pure oxygen.Pure oxygen is provided by air-separating plant.Under the synergy of three strands of wind, coal dust is fully burning in burner hearth.Feature of the present invention is, in a wind, oxygen concentration will be higher than Secondary Air, and a wind oxygen content is 30-50%; Secondary Air oxygen content is 5-25%.The oxygen volume flow that enters burner hearth accounts for the 21-35% that enters the total volumetric flow of gas of burner hearth, and the ratio of a Secondary Air is (5%-25%): (95%-75%), oxygen excess coefficient is 1.00-1.2.According to aforementioned proportion configuration air output, can improve the stability of burning, change Flame Temperature Distribution, significantly reduce NO in combustion process
xgeneration.
As shown in Figure 1, be coal dust oxygen-enriched combustion system schematic diagram in the present invention, described system comprises burner hearth, burner, flue gas cleaner, condenser, flow control valve, circulating fan and booster fan, wherein:
Described burner hearth, for mixed wind, Secondary Air and a tertiary air are carried out to oxygen-enriched combusting, produces high temperature, is rich in CO
2flue gas;
Described flue gas cleaner is used for the described high temperature producing after oxygen-enriched combusting, is rich in CO
2flue gas carry out dust removal process;
Described condenser, for described flue gas after dust removal process is carried out to condensation process, is removed the moisture in flue gas;
Described flow controller, for the flue gas after condensation process is regulated, is divided into two parts by flue gas: a part of discharge system obtains the CO of high concentration
2; Remainder injects after pure oxygen through described circulating fan, after mixing with coal dust as a wind;
Described booster fan for high temperature that described oxygen-enriched combusting is produced, be rich in CO
2flue gas inject after pure oxygen and carry out supercharging as Secondary Air;
Using pure oxygen as tertiary air;
After a described wind, Secondary Air and tertiary air mix, then inject burner hearth by burner, make coal dust at stove chamber inner combustion;
Wherein: in a wind, oxygen concentration will be higher than oxygen concentration in Secondary Air, a wind oxygen content is 30-50%; Secondary Air oxygen content is 5-25%, the oxygen volume flow that enters burner hearth accounts for the 21-35% that enters the total volumetric flow of gas of burner hearth, the ratio of wind and Secondary Air is (5%-25%): (95%-75%), oxygen excess coefficient is 1.00-1.2.
Further, described system also comprises air-separating plant, and described air-separating plant, for separating of air, obtains pure oxygen after removal nitrogen.
For this coal dust oxygen-enriched combustion system, the invention allows for a kind of oxygen-enriched combustion method for pulverized coal, described method comprises:
By oxygen-enriched combusting produce high temperature, be rich in CO
2flue gas carry out dust removal process through flue gas cleaner, then remove the moisture in flue gas through condenser, under the adjusting of flow controller, be divided into two parts: a part of discharge system obtains the CO of high concentration
2; Remainder injects after pure oxygen through circulating fan, after mixing with coal dust as a wind;
By oxygen-enriched combusting produce high temperature, be rich in CO
2flue gas inject after pure oxygen through booster fan as Secondary Air;
Using pure oxygen as tertiary air;
After a described wind, Secondary Air and tertiary air are mixed, then inject burner hearth by burner, make coal dust at stove chamber inner combustion;
Wherein: in a wind, oxygen concentration will be higher than Secondary Air, a wind oxygen content is 30-50%; Secondary Air oxygen content is 5-25%, the oxygen volume flow that enters burner hearth accounts for the 21-35% that enters the total volumetric flow of gas of burner hearth, the ratio of wind and Secondary Air is (5%-25%): (95%-75%), oxygen excess coefficient is 1.00-1.2.
Preferably, described pure oxygen, is obtained after removal nitrogen by separating air by air-separating plant.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. an oxygen-enriched combustion method for pulverized coal, is characterized in that, described method comprises:
By oxygen-enriched combusting produce high temperature, be rich in CO
2flue gas carry out dust removal process through flue gas cleaner, then remove the moisture in flue gas through condenser, under the adjusting of flow controller, be divided into two parts: a part of discharge system obtains the CO of high concentration
2; Remainder injects after pure oxygen through circulating fan, after mixing with coal dust as a wind;
By oxygen-enriched combusting produce high temperature, be rich in CO
2flue gas inject after pure oxygen through booster fan as Secondary Air;
Using pure oxygen as tertiary air;
After a described wind, Secondary Air and tertiary air are mixed, then inject burner hearth by burner, make coal dust at stove chamber inner combustion;
Wherein: in a wind, oxygen concentration will be higher than Secondary Air, a wind oxygen content is 30-50%; Secondary Air oxygen content is 5-25%, the oxygen volume flow that enters burner hearth accounts for the 21-35% that enters the total volumetric flow of gas of burner hearth, the ratio of wind and Secondary Air is (5%-25%): (95%-75%), oxygen excess coefficient is 1.00-1.2.
2. the method for claim 1, is characterized in that, described pure oxygen, is obtained after removal nitrogen by separating air by air-separating plant.
3. a coal dust oxygen-enriched combustion system, is characterized in that, described system comprises burner hearth, burner, flue gas cleaner, condenser, flow control valve, circulating fan and booster fan, wherein:
Described burner hearth, for mixed wind, Secondary Air and a tertiary air are carried out to oxygen-enriched combusting, produces high temperature, is rich in CO
2flue gas;
Described flue gas cleaner is used for the described high temperature producing after oxygen-enriched combusting, is rich in CO
2flue gas carry out dust removal process;
Described condenser, for described flue gas after dust removal process is carried out to condensation process, is removed the moisture in flue gas;
Described flow controller, for the flue gas after condensation process is regulated, is divided into two parts by flue gas: a part of discharge system obtains the CO of high concentration
2; Remainder injects after pure oxygen through described circulating fan, after mixing with coal dust as a wind;
High temperature that described oxygen-enriched combusting produces, be rich in CO
2flue gas also inject after pure oxygen through booster fan as Secondary Air;
Using pure oxygen as tertiary air;
After a described wind, Secondary Air and tertiary air mix, then inject burner hearth by burner, make coal dust at stove chamber inner combustion;
Wherein: in a wind, oxygen concentration will be higher than oxygen concentration in Secondary Air, a wind oxygen content is 30-50%; Secondary Air oxygen content is 5-25%, the oxygen volume flow that enters burner hearth accounts for the 21-35% that enters the total volumetric flow of gas of burner hearth, the ratio of wind and Secondary Air is (5%-25%): (95%-75%), oxygen excess coefficient is 1.00-1.2.
4. system as claimed in claim 3, is characterized in that, described system also comprises air-separating plant, and described air-separating plant, for separating of air, obtains pure oxygen after removal nitrogen.
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| CN201410170889.8A CN103968373A (en) | 2014-04-25 | 2014-04-25 | Pulverized coal oxygen-rich combustion method and system |
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| CN201410170889.8A CN103968373A (en) | 2014-04-25 | 2014-04-25 | Pulverized coal oxygen-rich combustion method and system |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458804A (en) * | 2014-12-05 | 2015-03-25 | 浙江大学宁波理工学院 | Device for forming oxidative Cl in smoke under oxygen-enriched combustion atmosphere |
| CN104613784A (en) * | 2015-01-30 | 2015-05-13 | 魏伯卿 | Hot smoke recycling and oxygen-enriched combustion comprehensive energy-saving efficiency-improving method |
| CN105509037A (en) * | 2016-01-25 | 2016-04-20 | 中国神华能源股份有限公司 | Flue gas and air system for oxygen-enriched combustion and boiler system |
| CN105605562A (en) * | 2015-12-25 | 2016-05-25 | 中国神华能源股份有限公司 | Smoke gas circulation system of oxygen-enriched combustion boiler |
| CN105910128A (en) * | 2016-04-21 | 2016-08-31 | 成都华西堂环保科技有限公司 | Oxy-fuel combustion process of boiler |
| CN105953251A (en) * | 2016-05-30 | 2016-09-21 | 北京志诚宏业智能控制技术有限公司 | Smoke recirculation energy-saving and emission-reducing intelligent device and control method |
| CN106196019A (en) * | 2016-08-08 | 2016-12-07 | 徐泽蛟 | A kind of energy-saving ring insulation boiler plant puts boiler plant |
| CN106545846A (en) * | 2015-09-17 | 2017-03-29 | 鞍钢股份有限公司 | A kind of low NO of heating furnacexFlue gas recirculation oxygen-enriched burning device and method |
| CN107062286A (en) * | 2016-12-29 | 2017-08-18 | 中国石油天然气股份有限公司 | A kind of gas fired-boiler oxygen-enriched combusting fume afterheat step is reclaimed and EGR |
| CN108644788A (en) * | 2018-05-22 | 2018-10-12 | 华中科技大学 | A kind of oxygenation combustion method of coal dust blending sludge |
| CN108679599A (en) * | 2018-05-22 | 2018-10-19 | 华中科技大学 | A kind of oxygenation combustion method of coal dust blending biomass |
| CN108916884A (en) * | 2018-05-22 | 2018-11-30 | 华中科技大学 | A kind of oxygenation combustion method of coal dust blending rubbish |
| CN109724070A (en) * | 2019-02-21 | 2019-05-07 | 华中科技大学 | A kind of supercharged oxygen-enriched coal burning system and method |
| CN109812804A (en) * | 2019-03-06 | 2019-05-28 | 华中科技大学 | A kind of combined combustion device using semicoke and combustion method |
| CN110397939A (en) * | 2018-04-20 | 2019-11-01 | 中国科学院工程热物理研究所 | The melting process for the treatment of and processing unit of ultralow volatile matter carbon-based fuel |
| CN111006206A (en) * | 2019-12-13 | 2020-04-14 | 华中科技大学 | Flameless classified oxygen-enriched low-NOx combustion method and system |
| CN111750341A (en) * | 2020-07-08 | 2020-10-09 | 湖南大学 | Oxygen-enriched combustion system and control method thereof |
| CN113074376A (en) * | 2021-03-24 | 2021-07-06 | 西安交通大学 | Gasification fly ash low NOxCombustion fusion processing system and method |
| CN113137624A (en) * | 2021-04-02 | 2021-07-20 | 武瑞香 | Energy-conserving device that utilizes of thermal power plant's wind cigarette system |
| CN114413278A (en) * | 2022-01-04 | 2022-04-29 | 华北电力科学研究院有限责任公司 | Method for determining highest oxygen concentration of primary air, and low-load stable combustion method and system of pulverized coal boiler |
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| CN104458804A (en) * | 2014-12-05 | 2015-03-25 | 浙江大学宁波理工学院 | Device for forming oxidative Cl in smoke under oxygen-enriched combustion atmosphere |
| CN104613784A (en) * | 2015-01-30 | 2015-05-13 | 魏伯卿 | Hot smoke recycling and oxygen-enriched combustion comprehensive energy-saving efficiency-improving method |
| CN104613784B (en) * | 2015-01-30 | 2016-04-27 | 魏伯卿 | Hot cigarette reclaims oxygen-enriched combustion-supporting synthesis energy saving and puies forward efficacious prescriptions method |
| CN106545846A (en) * | 2015-09-17 | 2017-03-29 | 鞍钢股份有限公司 | A kind of low NO of heating furnacexFlue gas recirculation oxygen-enriched burning device and method |
| CN105605562A (en) * | 2015-12-25 | 2016-05-25 | 中国神华能源股份有限公司 | Smoke gas circulation system of oxygen-enriched combustion boiler |
| CN105509037A (en) * | 2016-01-25 | 2016-04-20 | 中国神华能源股份有限公司 | Flue gas and air system for oxygen-enriched combustion and boiler system |
| CN105910128A (en) * | 2016-04-21 | 2016-08-31 | 成都华西堂环保科技有限公司 | Oxy-fuel combustion process of boiler |
| CN105953251A (en) * | 2016-05-30 | 2016-09-21 | 北京志诚宏业智能控制技术有限公司 | Smoke recirculation energy-saving and emission-reducing intelligent device and control method |
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| CN107062286A (en) * | 2016-12-29 | 2017-08-18 | 中国石油天然气股份有限公司 | A kind of gas fired-boiler oxygen-enriched combusting fume afterheat step is reclaimed and EGR |
| CN110397939B (en) * | 2018-04-20 | 2021-12-03 | 中国科学院工程热物理研究所 | Melting treatment method and treatment device for ultralow-volatile carbon-based fuel |
| CN110397939A (en) * | 2018-04-20 | 2019-11-01 | 中国科学院工程热物理研究所 | The melting process for the treatment of and processing unit of ultralow volatile matter carbon-based fuel |
| CN108916884A (en) * | 2018-05-22 | 2018-11-30 | 华中科技大学 | A kind of oxygenation combustion method of coal dust blending rubbish |
| CN108644788A (en) * | 2018-05-22 | 2018-10-12 | 华中科技大学 | A kind of oxygenation combustion method of coal dust blending sludge |
| CN108679599A (en) * | 2018-05-22 | 2018-10-19 | 华中科技大学 | A kind of oxygenation combustion method of coal dust blending biomass |
| CN108644788B (en) * | 2018-05-22 | 2020-05-19 | 华中科技大学 | Oxygen-enriched combustion method for coal powder mixed with sludge |
| CN108679599B (en) * | 2018-05-22 | 2020-06-26 | 华中科技大学 | Oxygen-enriched combustion method for mixing pulverized coal with biomass |
| CN109724070A (en) * | 2019-02-21 | 2019-05-07 | 华中科技大学 | A kind of supercharged oxygen-enriched coal burning system and method |
| CN109812804A (en) * | 2019-03-06 | 2019-05-28 | 华中科技大学 | A kind of combined combustion device using semicoke and combustion method |
| CN109812804B (en) * | 2019-03-06 | 2024-01-26 | 华中科技大学 | Combined combustion device and combustion method for burning semicoke |
| CN111006206A (en) * | 2019-12-13 | 2020-04-14 | 华中科技大学 | Flameless classified oxygen-enriched low-NOx combustion method and system |
| CN111750341B (en) * | 2020-07-08 | 2023-03-14 | 湖南大学 | Oxygen-enriched combustion system and control method thereof |
| CN111750341A (en) * | 2020-07-08 | 2020-10-09 | 湖南大学 | Oxygen-enriched combustion system and control method thereof |
| CN113074376A (en) * | 2021-03-24 | 2021-07-06 | 西安交通大学 | Gasification fly ash low NOxCombustion fusion processing system and method |
| CN113137624A (en) * | 2021-04-02 | 2021-07-20 | 武瑞香 | Energy-conserving device that utilizes of thermal power plant's wind cigarette system |
| CN114413278A (en) * | 2022-01-04 | 2022-04-29 | 华北电力科学研究院有限责任公司 | Method for determining highest oxygen concentration of primary air, and low-load stable combustion method and system of pulverized coal boiler |
| CN114413278B (en) * | 2022-01-04 | 2024-04-19 | 华北电力科学研究院有限责任公司 | Method for determining highest oxygen concentration of primary air, low-load stable combustion method and system of pulverized coal boiler |
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