摘要
为有效评价生物质气化耦合燃煤锅炉系统能量转换过程,分析该系统的节能潜力,以某10 MW循环流化床生物质气化炉耦合大型超临界燃煤机组为例,建立了该耦合系统的[火用]分析控制体模型,利用Aspen plus平台对该系统实际运行过程进行[火用]平衡分析。结果表明:当前运行工况下,生物质气化过程[火用]损失是耦合系统最大的[火用]损失,达到42. 28%,其次是可燃气体在燃煤锅炉内的燃烧及传热过程,为25. 32%。因此系统运行过程中应采取优化运行措施,减小气化过程[火用]损失,同时气化炉应尽量与高参数的大型机组耦合运行,可燃气体选取在燃煤锅炉合适位置输入,以保证充分燃烧。
In order to effectively evaluate the energy conversion process of the biomass gasification coupled coal-fired boiler system,the energy-saving potential of the system is analyzed.With a 10 MW circulating fluidized bed biomass gasifier coupled with a large supercritical coal-fired unit as an example,the control volume model of the coupling system is establisehd and the exergy efficiency of the actual operation process of the system is analyzed.The results show that the exergy loss of biomass gasification is the biggest loss in the coupling system,reaching 42.28%,followed by the combustion and heat transfer of combustible gas in coal-fired boilers,which is 25.32%.Optimized operation measures should be taken to reduce the exergy loss of biomass gasification during the operation of the system.At the same time,the gasifier should be coupled with large-scale units with high parameters as much as possible,and the gas should be selected for proper position input of coal-fired boilers to ensure full combustion.
作者
于鹏峰
肖申
葛志伟
杨涛
YU Peng-feng;XIAO Shen;GE Zhi-wei;YANG Tao(HuaDian Electric Power Research Institute Co.Ltd.,Hangzhou,China,Post Code:310030;Hubei Huadian Xiangyang Power Generation Co.Ltd.,Xiangyang,China,Post Code:441000)
出处
《热能动力工程》
CAS
CSCD
北大核心
2019年第12期131-136,共6页
Journal of Engineering for Thermal Energy and Power
关键词
生物质
生物质气化
超临界燃煤机组
耦合发电
[火用]平衡
biomass
biomass gasification
supercritical coal fired unit
coupled power generation
exergy balance
