INVESTIGATION ON LOAD CONTROL OF A 600MW SUPERCRITICAL CIRCULATING FLUIDIZED BED BOILER

摘要：

　　Load control is the core of boiler operation control system and is important for the safe and stable of the power plant.The operation of the first 600MW supercritical CFB unit that was recently built in Baima, China showed that the supercritical CFB boiler, differing from the pulverized coal boilers, was featured with large thermal inertia in the furnace.With the conventional load control scheme, the boiler operation was unstable and main steam parameters remarkably deviated from the designed values.Thus, a novel load control scheme was proposed based on the concept of Burning carbon.During the load adjustment, the amount of burning carbon was kept nearly unchanged in the furnace by controlling the changes of coal feeding, flow rates of the primary and secondary airs, and air to coal ratio.The thermal inertia effect was also considered in the control of feedwater.The application showed that the proposed load control scheme improved the dynamic performance of the boiler, shortening the response time and remaining the main steam pressure and the main steam temperature stable during the load adjustment process.

关键词： CFB supercritical load control burning carbon

作者: Mingming GAO Jizhen LIU Guangxi Yne Zhiqiang Liu Hairui Yang Hai Zhang

作者单位: Dept of Thermal Engineering,Tsinghua University,Beijing,100084;School of Control and Computer Engine School of Control and Computer Engineering,North China Electric Power University,Beijing 102206 Dept of Thermal Engineering,Tsinghua University,Beijing,100084 Shenhua Shendong Power Company Ltd.,Shanxi,719300,China

会议类型: 国际会议

会议名称: The 11th International Conference on Fluidized Bed Technology(CFB-11)(第十一届流化床技术国际会议)

会议地点: 北京

会议语种:英文

页码: 711-719

在线出版日期: 2014-05-14（万方平台首次上网日期，不代表论文的发表时间）