热力发电2018，Vol.47Issue(6)：105-110,6.DOI:10.19666/j.rlfd.201708090
低低温省煤器联合暖风器系统运行优化
Operation optimization of low-low temperature economizer combined air heater system
摘要
Abstract
To explore the optimum operation mode for the operation optimization of the low-temperature economizer combined heater system under different loads,operation optimization test is carried out in a 300 MW unit.The results show that ambient air temperature is basically unchanged and the temperature of the boiler exhaust shows a linearly increasing trend with the increased air temperature of the air heater.With the temperature rise of the air heater,the heat exchange proportion of the air heater increases approximately linearly at medium and high loads,and at low load the ratio increases at first and then tends to be gentle.Based on the outage state of the low-low temperature economizer combined heater system,within the experimental range,the reduction of the heat rate of steam turbine is linear with the recuperated heat,the increase of the thermal efficiency of the boiler is positively correlated with the increase of air temperature of the air heater outlet,the decrease of coal consumption of power supply is positively correlated with the increase of air temperature of the air heater outlet and the proportion of the absorbed heat at the air heater side.In actual operation,when the air temperature of the air heater outlet is controlled at 70 ℃,the economy of the overall unit is best.The results of this study provide some technical references for improving the economy of thermal power units.关键词
低低温省煤器/暖风器/运行优化/热量分配/供电煤耗/余热利用/经济性Key words
low-low temperature economizer/air heater/operation optimization/heat partition/coal consumption of power supply/waste heat utilization/economy分类
信息技术与安全科学引用本文复制引用
吕凯,佘园元,张知翔,王东晔,于龙文,柳宏刚,马汀山..低低温省煤器联合暖风器系统运行优化[J].热力发电,2018,47(6):105-110,6.基金项目
中国华能集团有限公司总部科技项目(HNKJ15-H09)Science and Technology Project of China Huaneng Group (HNKJ15-H09) （HNKJ15-H09）
