燃用混煤的1000 MW旋流对冲锅炉宽负荷稳燃特性研究  

Study on Combustion Stability of a 1000 MW Swirl-opposed Boiler with Blending Coal Under Wide Load

作　　者：马达夫 何翔[1,2] 张守玉 赵旭[2] 常明 MA Dafu;HE Xiang;ZHANG Shouyu;ZHAO Xu;CHANG Ming(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Power Equipment Research Institute Co.,Ltd.,Shanghai 200240,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]上海发电设备成套设计研究院有限责任公司,上海200240

出　　处：《动力工程学报》2021年第12期1019-1026,共8页Journal of Chinese Society of Power Engineering

基　　金：国家电力投资集团课题资助项目(201805559)。

摘　　要：针对某1000 MW旋流对冲锅炉不同负荷下炉膛燃烧不稳定的问题,对市场煤、混煤、象山煤、晋煤、煤泥和冯家川煤6种常用煤种进行了煤质分析及燃烧特性分析,并在试验锅炉上进行了高、低负荷下煤粉特性分析及稳燃特性研究。结果表明:700~1000 MW负荷下火检信号弱的主要原因是燃用高挥发分煤的下层燃烧器缺风,增大外二次风门挡板开度后火检信号明显增强,飞灰含碳质量分数降低;400~520 MW负荷下稳燃能力不足主要是由于煤质较差、炉膛截面热负荷低、燃烧器扩锥角度小,通过制粉系统及风烟系统优化后稳燃能力提高。To solve the problem of combustion instability in the furnace of a 1000 MW swirl-opposed boiler under different loads,coal quality and combustion characteristics of the market coal,mixed coal,Xiangshan coal,Jin coal,peat and Fengjiachuan coal were analyzed.The characteristics of pulverized coal and combustion stability under high and low loads were studied.Results show that the main reason for the weak fire detection signals under the load of 700-1000 MW is the lack of air in the lower burner which burns high volatile coal.The fire detection signal is obviously enhanced and the carbon content of fly ash is reduced by increasing the outer secondary damper opening.The combustion instability under the load of 400-520 MW is due to the poor quality of coal,the low heat load in the furnace section and small angle of burner expansion cone.The combustion stability can be obviously enhanced after the optimization of pulverizing system and air-flue gas system.

关 键 词：旋流对冲锅炉 混煤燃烧 稳燃特性 宽负荷 

分 类 号：TK227[动力工程及工程热物理—动力机械及工程]