新型两段式气化炉的数值分析

doi:10.3969/j.issn.0438-1157.2012.12.002

化工学报 ›› 2012, Vol. 63 ›› Issue (12): 3747-3755.DOI: 10.3969/j.issn.0438-1157.2012.12.002

新型两段式气化炉的数值分析

金渭龙, 王亦飞, 彭康, 吴超琦, 许建良

华东理工大学煤气化教育部重点实验室, 上海 200237

收稿日期:2012-04-24 修回日期:2012-06-18 出版日期:2012-12-05 发布日期:2012-06-27
通讯作者: 王亦飞
作者简介:金渭龙(1986-),男,博士研究生。
基金资助:
上海市优秀学科带头人资助计划项目(08XD1401306)。

Numerical simulation analysis of novel two-stage gasifier

JIN Weilong, WANG Yifei, PENG Kang, WU Chaoqi, XU Jianliang

East China University of Science and Technology, Key Laboratory of Coal Gasification of Ministry of Education, Shanghai 200237, China

Received:2012-04-24 Revised:2012-06-18 Online:2012-12-05 Published:2012-06-27

摘要/Abstract

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%。

关键词: 水煤浆, 两段炉, 数值模拟

Abstract: 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%.

Key words: coal-water slurry, two-stage gasifier, numerical simulation

中图分类号:

TQ054

金渭龙, 王亦飞, 彭康, 吴超琦, 许建良. 新型两段式气化炉的数值分析[J]. 化工学报, 2012, 63(12): 3747-3755.

JIN Weilong, WANG Yifei, PENG Kang, WU Chaoqi, XU Jianliang. Numerical simulation analysis of novel two-stage gasifier[J]. CIESC Journal, 2012, 63(12): 3747-3755.

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新型两段式气化炉的数值分析

Numerical simulation analysis of novel two-stage gasifier

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