Adjustment and research of 623 °C reheat steam temperature in the commissioning of 660 MW ultra-supercritical boiler

3rd International Conference on Energy Engineering and Environmental Protection

能源学;生态环境科学

Wang, Yongjia^1 ; Chen, Ying^2 ; Xiao, Guanhua^1 ; Zhang, Qingguo^1

Huadian Electric Power Research Institute Co. Ltd., Jinan

250000, China^1

CNOOC Petrochemical Engineering Co. Ltd., Jinan

250000, China^2

关键词: Commissioning process;    Design value;    High temperature;    Main steam temperatures;    Reheat steam temperature;    Safety margin;    Supercritical units;    Ultra supercritical boiler;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/227/4/042016/pdf
DOI  :  10.1088/1755-1315/227/4/042016

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The 623 °C reheat steam temperature is adopted for 660 MW ultra-supercritical unit. During the operation, the materials of the high temperature reheater surface have less safety margin, leading to the result that the reheat steam temperature cannot reach the design value. During the commissioning process, the combustion adjustment plan was optimized. After a lot of adjustment of combustion deviation, the main steam temperature and reheat steam temperature reached to the design value. The temperature of the reheater surface was lower than the alarm value.