高炉煤气的CCPP发电系统运行特性分析

Study on operational characteristics of CCPP with blast furnace gas

以燃用高炉煤气的燃气蒸汽联合循环发电系统为研究对象,分析了燃气轮机进气温度、负荷和排烟温度及汽轮机负荷之间的关系。当燃气轮机进气温度低于-16℃时,汽轮机负荷降低12 MW;当燃气轮机进气温度超过20℃时,燃气轮机最高负荷约105 MW,比额定负荷低4 MW。燃气轮机进气温度过高或过低均会使系统的经济性变差。采取加热或冷却的措施维持燃气轮机进气温度在合理范围,可实现燃气蒸汽联合循环发电系统经济运行。

The study focuses on the gas steam combined cycle power generation system using blast furnace gas,and analyzes the relationship between the inlet temperature,load,exhaust temperature,and turbine load of the gas turbine.When the inlet temperature of the gas turbine is below-16℃,the turbine load decreases by 12 MW;When the intake temperature of the gas turbine exceeds 20℃,the maximum load of the gas turbine is about 105 MW,which is 4 MW lower than the rated load.Both high and low gas temperatures will deteriorate the economic efficiency of the system.Adopting heating or cooling measures to maintain the intake temperature within a reasonable range can achieve the economic operation of gas steam combined cycle power generation systems.