两段式水煤浆气化炉气化参数对IGCC系统性能的影响

采用Thermo Flex软件建立了基于两段式水煤浆气化技术的200MW级IGCC系统模型,研究了气化温度、水煤浆浓度、气化压力、氧气纯度等气化参数对系统性能的影响.结果表明：提高反应温度和气化压力,系统的供电效率和发电效率降低;氧气纯度增加,供电效率上升;在相同气化温度（或气化压力、氧气纯度）的情况下,提高二段给煤比γsc,系统性能可以得到有效改善;当水煤浆浓度变化时,氧煤质量比随γsc改变进行调整才能达到设计值碳转化率的要求.

Influence of Gasification Parameters in a Two-stage Coal-Slurry Gasifier on Performance of the IGCC System

Using software ThermoFlex,a model of 200 MW IGCC system was established based on two-stage coal-slurry gasification technology,so as to study the effects of following factors on performance of the IGCC system,such as the gasification temperature,coal-slurry concentration,gasification pressure and purity of oxygen,etc.Results show that both the gross and net efficiency of power generation decrease with rising gasification temperature and pressure;higher net efficiency is to be obtained at a flow of higher purity oxgen;raising coal supply ratio（γsc） at the second stage may help to improve the system performance under same conditions of gasification temperature（or purity of oxygen,or gasification pressure）.Whereas under the varying conditions of coal-slurry concentration,the designed value of carbon conversion can be achieved based on adjustment of oxygen-coal mass ratio along with the variation of γsc.