摘要
提出一种超临界锅炉热量信号的构造方法,实现了对入炉燃煤发热量的准确测量。采用热力学性质标准IAPWS-IF97对超临界锅炉水冷壁进行分区,解决了超临界工况下水冷壁内工质状态变化的难判断问题,对锅炉的蓄热系数进行了详细计算。根据某1 000 MW机组的结构参数和实际运行数据,对构造的热量信号进行验证。结果显示,该热量信号能够在快速响应机组负荷变化的同时准确地反映入炉燃煤发热量的变化,为超临界机组直接能量平衡协调控制系统设计打下基础。
The construction method of the heat release signal of a supercritical boiler is proposed,which can accurately measure the calorific value of coal in the furnace.The thermodynamic property standard,IAPWS-IF97 is adopted to partition the supercritical boiler water cooled wall,which solves the difficult problem of judging the working fluid state within the water cooled wall under supercritical condition; and the boiler heat storage coefficient is calculated in detail.According to the structure parameters and actual operation data of a certain 1000 MW unit,the heat release signal of the structure was verified.The results show that the heat release signal can rapidly response to the unit load change,at the same time accurately reflect the changes of the calorific value of coal in the furnace,which lays a foundation for the design of the direct energy balance coordinated control system of supercritical units.
作者
谷俊杰
白智中
王鹏
张岩
Gu Junjie Bai Zhizhong Wang Peng Zhang Yan(School of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2017年第2期497-504,共8页
Chinese Journal of Scientific Instrument
基金
河北省教育厅科学研究指导性项目(z2012011)资助
关键词
超临界锅炉
热量信号
燃煤发热量
蓄热系数
直接能量平衡
supercritical boiler
heat release signal
calorific value of coal
heat storage coefficient
direct energy balance
