皖北刘二煤在Shell气流床气化过程中熔渣形成机理初探  

Study of Slag Melt Mechanism of Liuer Coal in Shell Gasifier by X-ray Diffraction(XRD)

作　　者：李继炳[1] 汤永新[2] 芦涛[3] 李寒旭[3] 

机构地区：[1]中国石油化工股份有限公司安庆分公司,安徽安庆246002 [2]安徽理工大学理学院,安徽淮南232001 [3]安徽理工大学化工学院,安徽淮南232001

出　　处：《化工时刊》2009年第5期42-46,共5页Chemical Industry Times

基　　金：中国石油化工股份有限公司科研开发资金资助(合同号:405099)

摘　　要：选取安庆石化Shell气化炉使用的皖北刘二煤(简称AQ007)及气化过程产生的大块渣和细渣样品,利用X-射线衍射仪(XRD),考查了AQ007煤在弱还原性气氛下不同加热温度下煤灰熔融过程中的矿物演变过程,对煤灰的熔融机理进行了探讨,对Shell气化过程产生的大块渣和细渣的晶体矿物组成进行了对比研究。结果表明:AQ007煤中的主要晶体矿物有高岭石、石英、方解石、白云母等。在还原性气氛下,煤灰随着温度的升高,石英、硬石膏等结晶矿物含量逐渐减少,生成新的矿物质,莫来石的生成是导致AQ007煤灰熔点高的主要原因。大量钙长石的生成是导致安庆石化Shell气化炉产生大块熔渣和堵渣主要原因。By using the advanced instrumentation of X - ray diffraction （XRD）, the mineral matter and mineral transformation of Liuer coal （ AQ007 ） coal were studied. The mineral phase of slag lumps and small slag particles from Shell gasifier were also studied by XRD technique. The results show that the mineral phases of AQ007 coal gen- erally include kaolinite and quartz. Calcite, gypsum and pyrite quartz. The minerals in coal with high melting temperature are mainly kaolinite and quartz. During the heating processes, the content of mullite formed in the heating process is the main reason of high ash melting temperature of AQ007 coal. A large amount of anorthite formed in the slag lumps is the main reason of slag blockage in the Shell gasifier.

关 键 词：SHELL气化炉 煤灰行为 堵渣 X-射线衍射 

分 类 号：TQ541[化学工程—煤化学工程]