燃气轮机动态仿真及排放特性研究

Dynamic Simulation and Emission Characteristics Study on Gas Turbine

建立了H级重型燃气轮机动态仿真模型,探究了负荷和环境温度扰动下机组的动态响应特性以及不同停留时间下燃烧污染物的排放特性。结果表明:所建立的机组模型能够正确模拟不同扰动下燃气轮机的参数响应过程,且具有较好的稳定性;环境温度升高时,为防止燃气轮机超温,控制系统通过降低燃气轮机输出功来保证系统的安全运行,稳态时透平进出口温度虽有上升,但在安全范围内;随着燃烧温度升高,NOx生成量逐渐增加,在一定温度范围内,两者呈指数关系变化,而CO的生成量则有所下降;随着停留时间的增大,NOx生成量逐渐增加,CO生成量则相反。

A dynamic simulation model for H-class heavy-duty gas turbine is developed,the dynamic response characteristics and pollutant emissions with different residence times are investigated under load and ambient temperature disturbance. The results show that the H-class heavy-duty gas turbine model has an approximate behavior and stability in simulating the dynamic response characteristics under external disturbances. When the ambient temperature increases,the control system keeps safe operation by reducing output power to avoid the over-temperature of gas turbine,the temperature of inlet and outlet of gas turbine increase slightly but within limits during steady state operation. The NOxemission rises gradually with increasing combustion temperature,and keep related exponentially in a certain temperature range,but the CO emission declines under the same condition. With increasing residence time,trend in the rate of formation of NOxis increase,while the CO emission in an opposite trend.