气流床气化炉水激冷固态熔渣理化特性研究  

Water-cooled solid slag physicochemical property in entrained-flow gasifier

作　　者：孙立[1] 沈中杰[1] 梁钦锋[1] 许建良[1] 刘海峰[1] 

机构地区：[1]华东理工大学煤气化及能源化工教育部重点实验室上海煤气化工程技术研究中心,上海200237

出　　处：《化学工程》2014年第5期61-65,71,共6页Chemical Engineering(China)

基　　金：国家重点基础研究发展计划(973计划)资助项目(2010CB227005);国家自然科学基金资助项目(21106046);国家高技术研究发展计划(863计划)资助项目(2013AA051103)

摘　　要：为了研究水激冷相变后固态熔渣的理化特性规律,在气流床水冷壁气化炉热模实验平台上,以神府煤灰渣、柴油、氧气等作为实验介质,采用扫描电镜(SEM)和X射线衍射(XRD)等方法对不同操作温度下不同粒度的熔渣形态、晶相进行表征及对比分析,并探讨液态熔渣遇水快速冷却时的形态转变机理。研究表明:随操作温度升高,熔渣孔隙率和晶体含量减少,无定形玻璃态物质增多。遇水激冷后熔渣的气孔及热应力变化造成多孔熔渣易发生断裂、破碎行为;粒度较大的熔渣易发生断裂、破碎行为。粒度较大的熔渣主要存在开放性孔,粒度较小的熔渣主要存在封闭性孔。In order to study the physicochemical property of water-cooled solid slag,from a lab-scale membrane wall entrained-flow gasifier,the surface morphology and crystals of slag at different temperature were investigated by SEM and XRD. The mechanism of morphology change of liquid slag during cooled rapidly by water was also explored. Shenfu slag,diesel oil and oxygen were prepared as raw materials. The experimental results show that both porosity of slag and the content of crystalline particles in ash slag decrease,but the content of glassy amorphous particles increases with the increase of experimental temperature. It shows that fragmentation occurs when the porous slag from furnace wall is cooled by water,and the fragmentation is determined by the porosity of pores and the thermal stress. The large slag particle is more inclined to rupture than the small one. The large slag particle contains open pores,while small one has closed pores.

关 键 词：气流床气化炉 熔渣理化特性 水激冷 破裂 

分 类 号：TQ545[化学工程—煤化学工程]