氧气纯度对两段式煤粉气化炉气化特性的影响  

Effect of oxygen purity on gasification performance of two-stage entrained-flow coal gasifier

作　　者：潘璐 樊建人[1] 穆延非 Pan Lu;Fan Jian-ren;Mu Yan-fei(State Key Laboratory of Cleen Energy Utilization,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《能源工程》2022年第2期1-6,16,共7页Energy Engineering

摘　　要：降低氧气纯度可以显著地降低空分能耗,对于提高IGCC电厂整体效率有着积极的意义。不过氧气纯度过低(低于95%),偏离设计工况参数,会对IGCC两段式干煤粉气化炉内温度、合成气组分以及气化效率造成一定的影响。为了探究氧气纯度对于IGCC两段式干煤粉气化炉内气化特性的影响,采用流程仿真软件Aspen Plus和数值模拟软件Fluent分别对其进行了模拟研究,以对比100%纯度氧气和90%纯度氧气运行情况.下,气化炉内的气化特性以及出口的合成气温度、组分的差异。结果表明:氧气纯度影响气化炉内温度分布,影响气化反应。氧气纯度下降10%,出口烟气温度降低100K,合成气中CO组分降低3%,但有效合成气组分仅下降1%。Reducing oxygen purity is favorable for significantly reducing energy consumption of air separation and improving overall efficiency of IGCC. However, an excessive low oxygen purity( below 95%), deviating from design parameters, will affect the temperature, composition of raw gas and gasification efficiency of the two-stage entrained flow gasifier. In order to explore the effect of oxygen purity on gasification reaction, simulation softwares(Aspen Plus and Fluent) are used. Comparing the gasification reaction with the temperature and composition of raw gas at outlet under the operation of 100% oxygen and 90% oxygen.The results show that the temperature distribution and gasification reaction are affected by oxygen purity.A 10% drop of oxygen purity will result in 100 K drop of outlet gas temperature, 3% drop of CO component in raw gas with 1% drop of effective components.

关 键 词：两段式干煤粉气化炉 数值模拟 氧气纯度 IGCC 

分 类 号：X831[环境科学与工程—环境工程]