热力发电2025，Vol.54Issue(7)：63-70,8.DOI:10.19666/j.rlfd.202503022
350MW超临界循环流化床煤电机组启停调峰试验
Experimental study on start-stop peak regulation of a 350 MW supercritical circulating fluidized bed coal-fired power unit
摘要
Abstract
With the rapid expansion of new energy power generation capacity in China,the insufficient load regulation capability of coal-fired power plants has become increasingly evident.In order to explore the start-stop peak regulation capability of supercritical circulating fluidized bed(CFB)power units,a 350 MW supercritical CFB unit was taken as the research object,and experimental studies on banked-fire hot standby and rapid start-stop operations were conducted.The experimental results demonstrated that the supercritical CFB unit can rapidly reduce its load to near zero(with an average load change rate of about 10%Pe/min)during bank firing,and then maintain hot standby for 108 minutes.After banked firing,the boiler quickly switched to wet-state operation,with the main steam pressure decreasing rapidly at a rate of 0.13 MPa/min.By reasonably controlling the feedwater flow,the working fluid temperature and wall temperature of the water-cooled walls and water-cooled panels were kept stable.The heat released from the combustion of residual carbon caused the bed temperature to decrease slowly during banked firing,which also provided favorable conditions for re-ignition.During the load lift phase,the unit could be quickly started,with NOx emission mass concentration reaching an instantaneous peak of 101 mg/m3,while the hourly average was stable below 50 mg/m3.Throughout the entire experimental period,SO2 emission mass concentration was consistently below 35 mg/m3,and pollutant emissions met the ultra-low-emission requirements.All parameters of the steam turbine and generator remained within normal ranges during the hot standby and startup/shutdown.The rapid decline in main steam pressure and the low superheat of the main steam temperature were the main factors limiting the duration of banked firing in this experiment.The relevant research work provides a reference for the start-stop peak regulation of higher-parameter supercritical and ultra-supercritical CFB units.关键词
超临界/循环流化床锅炉/调峰/压火热备/快速启停Key words
supercritical/circulating fluidized bed boiler/peak regulation/banked fire for hot standby/fast start-stop引用本文复制引用
宋海峰,王君峰,安仲红,兰文祥,常健,郭金亮,郎丽萍,柯希玮,吕俊复..350MW超临界循环流化床煤电机组启停调峰试验[J].热力发电,2025,54(7):63-70,8.基金项目
中国科协青年人才托举工程项目(2024-2026QNRC001) Young Elite Scientists Sponsorship Program of CAST(2024-2026QNRC001) （2024-2026QNRC001）
