热力发电2025，Vol.54Issue(7)：82-90,9.DOI:10.19666/j.rlfd.202502054
350MW超临界循环流化床机组压火调峰试验研究
Experimental study on banked fire for peak regulation of supercritical circulating fluidized bed units
摘要
Abstract
Circulating fluidized bed(CFB)boilers are characterized by high thermal inertia and strong heat storage capacity,enabling banked fire and near-zero output peak shaving.However,there is limited experimental research on banked fire and peak regulation in large-scale CFB units,with a lack of studies on key parameter variations and control strategies during this process.In this study,a banked fire and peak regulation test was conducted on a supercritical 350 MW CFB boiler to investigate the evolution of critical parameters during shutdown and propose optimization strategies for boiler feedwater flow rate and integrated turbine valve position control.These optimizations aim to maximize the peak shaving duration while ensuring operational safety.Experimental results demonstrate that the optimized supercritical CFB unit achieved 85 minutes of shutdown peak regulation with a load of 5～8 MW.Throughout the test,the boiler maintained dry operation,while the main and reheat steam temperatures decreased from 566.0℃and 553.0℃to 482.0℃and 472.0℃,with average cooling rates of 0.99℃/min and 0.95℃/min,respectively.The average bed temperature declined from 875.8℃to 730.9℃at a rate of 1.70℃/min.During the test,the maximum exhaust temperature of the high-pressure cylinder reached 380.0℃,with the steam temperature at the regulating stage exceeding that of the cylinder inner wall.The wall temperature deviation at the outlet of the boiler water-cooled walls and mid-partition walls gradually decreased,peaking at 97.5℃.These findings confirm the feasibility of hour-level shutdown peak regulation in supercritical CFB units and provide a reference for engineering applications of similar units.关键词
超临界/循环流化床锅炉/压火调峰/干态运行/床温Key words
supercritical/circulating fluidized bed boiler/banked fire and peak regulation/dry operation/bed temperature引用本文复制引用
佟博恒,黄中,吕俊复,李玉,马乐乐,许永伟,赵彬彬,杨军,杨雪婷,李金晶,程亮..350MW超临界循环流化床机组压火调峰试验研究[J].热力发电,2025,54(7):82-90,9.基金项目
国家重点研发计划项目(2022YFB4100303-3) National Key Research and Development Program(2022YFB4100303-3) （2022YFB4100303-3）
