整体煤气化湿化燃气轮机循环热力性能分析

本文以降低NOX排放和有效利用低品位热量为出发点,将燃料或空气湿化应用到整体煤气化燃气轮机循环中。基于水煤浆激冷或废锅流程气化炉,构建了多种整体煤气化湿化燃气轮机循环并分析了其热力性能。研究表明：燃料湿化循环系统效率较高;空气湿化循环燃气轮机比功较大;无论采用何种湿化方式,废锅流程循环系统效率都要高于激冷流程;蒸汽底循环保留的空气湿化循环系统具有利用系统外部中低品位热量、大幅提高系统效率的潜力。

Thermodynamic Performance Analysis of Integrated Gasification Humidified Gas Turbine Cycle

For the purpose of reducing NOx emissions and using low quality heat efficiently,fuel humidification or air humidification is applied to the integrated gasification gas turbine cycle in this paper.Based on coal-water slurry gasifiers employing quench or employing waste-heat boiler,a variety of integrated gasification gas turbine cycles have been established and their thermodynamic performances have been analyzed.The results of the study indicate that the fuel humidification cycle has higher efficiency than the air humidification cycle,but the specific work of gas turbine is higher in the air humidification cycle.No matter what kind of humidified approach is adopted,the cycle employing waste-heat boiler has higher efficiency than the cycle employing quench.Additionally,air humidification cycle system retained the steam bottoming cycle has the potential of taking advantage of low quality heat outside of the system to significantly improve system efficiency.