摘要
以设计燃料为棉花秸秆的某30MW高温高压生物质直燃发电项目作为研究对象,在6个不同工况下,对额定蒸发量为130t/h的生物质燃烧专用水冷振动炉排锅炉进行测试,对锅炉热效率进行计算,发现锅炉热效率小于设计值的主要原因是排烟温度偏高和燃料成分差异。对30MW纯凝汽式汽轮机进行测试,对汽轮机热耗进行计算,发现汽轮机热耗小于设计值的主要原因是背压偏高。对全厂热效率进行计算,发现随着功率的增加,热效率呈增加趋势。对热力循环过程进行火用分析,发现在锅炉内的温差换热和燃烧环节火用损失最大。
Based on one 30MW biomass directly fired power plant with high temperature and pressure, the test on the biomass specially fired 130T/h boiler with water cooled vibrating grate was carried out under 6 different work conditions, the thermal efficiency was calculated and it was found that the main reason for efficiency deviation was higher temperature of flue gas and bad quality of the fuel. The 30MW condensed steam turbine was tested, the heat consumption was calculated and it was found that the more high heat consumption was mainly because of higher back pressure. The thermal efficiency of whole plant was calculated and it was shown that the efficiency rose when the unit output rate rose. The exergy analysis of real thermal cycle was carried out, and it was found that the exergy loss of heat transfer between flue gas and water with different temperature and combustion process were the most important factors.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2012年第8期1283-1288,共6页
Acta Energiae Solaris Sinica
关键词
生物质发电
热效率
热耗
[火用]分析
biomass power generation
thermal efficiency
heat consumption
exergy analysis
