文献类型：期刊文献

中文题名：新型两段式气化炉的数值分析

英文题名：Numerical simulation analysis of novel two-stage gasifier

作者：金渭龙[1];王亦飞[1];彭康[1];吴超琦[1];许建良[1]

机构：[1]华东理工大学煤气化教育部重点实验室,上海200237

年份：2012

卷号：63

期号：12

起止页码：3747

中文期刊名：化工学报

外文期刊名：CIESC Journal

收录：CSTPCD;;EI(收录号：20130315910183);Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：上海市优秀学科带头人资助计划项目(08XD1401306)

语种：中文

中文关键词：水煤浆;两段炉;数值模拟

外文关键词：coal-water slurry; two-stage gasifier; numerical simulation

摘要：对一种新型两段式水煤浆气化炉的气化效率进行了数值计算和分析。模型中将水煤浆的气化过程分为水分蒸发、煤热解、气相反应和气固异相反应等子模型。气相反应速率需同时考虑湍流混合和化学反应机理,气固反应的速率采用未反应缩芯模型。运用可实现k-ε模型描述气相湍流流动,随机轨道模型追踪水煤浆颗粒的运动。以中试多喷嘴水煤浆气化炉为建模基础,验证了该水煤浆气化模型的准确性。模拟计算得出新型两段炉的有效气组分含量为85.91%,冷煤气效率为76.42%。
The gasification efficiency of a novel two-stage gasifier was studied and analyzed by numerical simulation.In this model the coal-water slurry（CWS）gasification process was divided into several sub-models：water droplet evaporation,coal pyrolysis,gas homogeneous reaction and gas-solid heterogeneous reaction.Turbulent flow mixing and chemical reaction were considered in the rate of gas phase reaction.The unreacted-core shrinking model was used to describe the rate of gas-solid heterogeneous reaction.The realizable k-ε turbulence model was used for the gas phase flow,and coal-water slurry particles were tracked by the Random-Trajectory model.The CWS gasification model was verified based on the model subject of a pilot-scale opposed multi-burner（OMB）gasifier.The simulation result showed that effective gas composition of the novel two-stage gasifier was 85.91%,and cold gas efficiency was 76.42%.