煤基多联产中两种煤气化工艺的模拟与性能比较  

Simulation and performance comparison of two kinds of coal gasification process in coal based ploy-generation

作　　者：刘传亮[1] 朱志劼[1] 范雪飞[1] 陈洪溪[1] 危奇[1] 

机构地区：[1]上海发电设备成套设计研究院,上海200240

出　　处：《洁净煤技术》2014年第2期64-68,72,共6页Clean Coal Technology

基　　金：上海市科委重大科技攻关项目(08DZ1200103)

摘　　要：以Aspen Plus为模拟工具,采用Gibbs最小自由能反应平衡方法建立了煤气化反应模型,分别模拟了水煤浆气流床的代表Texaco气化工艺、粉煤气流床的代表Shell气化工艺,分析了合成气成分、热值、冷煤气效率、氧耗率、煤耗率等性能指标,探讨了水煤浆浓度、氧煤比、煤种对气化性能的影响,并对两种气化工艺的模拟结果进行了比较。结果表明:在煤的成浆性允许范围内,提高水煤浆浓度有利于提高合成气有效气体含量,可获得更高冷煤气效率;在保证碳转化率的前提下,应尽量降低氧煤比,获得更优气化性能;挥发分高、灰分低的煤种,气化性能更好;粉煤气化的氧耗率、煤耗率低于水煤浆气化,其气化性能更为先进。Taking Aspen Plus as simulation tool,build coal gasification model with Gibbs minimum free energy equilibrium method.Simulate the Texaco process and Shell process,the former is presented by coal water mixture entrained-flow bed,the latter is presented by fine coal entrained-flow bed.Analyse the synthesis gas composition,calorific value,cold gas efficiency,oxygen consumption rate,coal consumption rate and other performances.Investigate the influence of coal water mixture concentration,ratio of oxygen to coal,coal types on gasification performance.The results show that,within the slurryability of coal,the increase of coal water mixture concentration is beneficial for the improvement of effective gas content in synthesis gas and cold gas efficiency.On premise of high carbon conversion rate,the reduction of ratio of oxygen to coal can improve the gasification efficiency.The coal with high volatile and low ash is beneficial for gasification.Comparing with the coal water mixture gasification,the pulverized coal gasification has more advantages,such as lower oxygen and coal consumption rate.

关 键 词：煤气化 气化性能 多联产 ASPEN PLUS软件 模拟 

分 类 号：TQ536[化学工程—煤化学工程] TD849[矿业工程—煤矿开采]