两段式气流床氧/煤比对干煤粉气化特性的影响

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王力军*，徐凌锋，杜晓成

沈阳航空航天大学能源与环境学院，辽宁沈阳 110136

收稿日期:2018-10-22修回日期:2019-02-04出版日期:2019-08-22发布日期:2019-08-15
通讯作者:王力军

基金资助:辽宁省自然科学联合基金项目

Effect of oxygen/coal ratio of two-stage entrained flow bed on gasification characteristics of dry coal powder

Lijun WANG*, Lingfeng XU, Xiaocheng DU

School of Energy and Environment, Shenyang Aerospace University, Shenyang, Liaoning 110136, China

Received:2018-10-22Revised:2019-02-04Online:2019-08-22Published:2019-08-15
Contact:Li-Jun WANG

Supported by:Liaoning Provincial Natural Science Joint Fund Project

摘要/Abstract

摘要： 基于Eulerian?Lagrangian方法建立了两段式干煤粉气流床的三维CFD计算流体动力学模型，利用均相与非均相多步化学反应动力学确定煤气化反应，用k??模型描述气相湍流流动，用随机轨道模型追踪煤粉颗粒的运动轨迹，模拟了气流床内的煤气化过程。在氧/煤质量比为0.9, 1.0和1.1时，基于文献实验条件对不同反应机理进行数值模拟，通过结果对比获得最佳反应机理。考察了氧煤比为1.0时上下两阶段煤/氧比对煤气化特性的影响。结果表明，选用焦炭和挥发物完全燃烧反应、忽略CO参与气相燃烧反应的反应机理(Case E)的模拟结果与实验数据非常吻合，误差小于2%。当一级喷嘴(A?A水平)煤和氧化剂喷入量达到并超过给煤量和进气量的50wt%时，合成气组分、碳转化率和有效成分等气化炉总体性能指标较好。在一级喷嘴喷入70wt%煤和60wt%氧气时碳转化率最大，为99.6%，一级喷嘴喷入50wt%煤和50wt%氧气时合成气组分最佳，最大合成气产率为78.24mol%。

引用本文

王力军徐凌锋杜晓成. 两段式气流床氧/煤比对干煤粉气化特性的影响[J]. 过程工程学报, 2019, 19(4): 836-844.
Lijun WANG Lingfeng XU Xiaocheng DU. Effect of oxygen/coal ratio of two-stage entrained flow bed on gasification characteristics of dry coal powder[J]. Chin. J. Process Eng., 2019, 19(4): 836-844.

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