摘要
以煤粉掺烧高炉煤气和焦炉煤气的锅炉为研究对象,研究了高炉煤气与焦炉煤气热量掺烧比协同分级配风对锅炉主蒸汽、再热蒸汽吸热量的影响。结果表明:仅掺烧高炉煤气或焦炉煤气对辐射换热量和对流换热量的分配作用相反;同时掺烧高炉煤气和焦炉煤气时,主蒸汽、再热蒸汽吸热量均以对流换热为主,总吸热量均增加;高炉煤气二次风门开度增大会使再热蒸汽吸热量增加,而对于主蒸汽,对流换热量的增加未能抵消辐射换热量的减少;主蒸汽和再热蒸汽的对流换热量均随着煤粉二次风门开度的增大而减少,且随着分离燃尽风(SOFA)风门开度的增大而增加。
Taking a pulverized coal boiler co-firing blast furnace gas and coke oven gas as an object of study, the effects of gas blending ratio and air staging mode on heat absorption of the main and reheat steam were studied. Results show that only co-firing blast furnace gas or coke oven gas would have contrary effects on the distribution of radiation heat transfer and convection heat transfer; when blast furnace gas and coke oven gas are simultaneously co-fired, the heat absorption of main steam and reheat steam is mainly in the convective way, and the total heat absorption of both the steam increases; with the rise of secondary air damper opening of blast furnace gas, the heat absorption of reheat steam increases, but for main steam, the increase of convection heat transfer can not offset the reduction of radiation heat transfer; the convection heat transfer of both the main and reheat steam reduces with rising secondary air damper opening of pulverized coal, but increases with rising SOFA damper opening.
出处
《动力工程学报》
CAS
CSCD
北大核心
2018年第3期182-187,210,共7页
Journal of Chinese Society of Power Engineering
基金
河北省自然科学基金资助项目(E2016502058)
关键词
混燃锅炉
高炉煤气
焦炉煤气
热量掺烧比
分级配风
热量分配
co-firing boiler
blast furnace gas
coke oven gas
gas blending ratio
air staging
heat distribution
