油页岩流化干馏物料流态化试验  

Fluidization experiment of oil shale fluidized retorting particles

作　　者：李国智 张振千[1] 王松江 LI Guozhi;ZHANG Zhenqian;WANG Songjiang(Luoyang Petrochemical Engineering Corporation,SINOPEC,Luoyang Henan 471003,China)

机构地区：[1]中国石化炼化工程(集团)洛阳技术研发中心(SEGR)

出　　处：《石油化工应用》2019年第6期110-115,共6页Petrochemical Industry Application

摘　　要：对油页岩流化干馏工艺中页岩粉、页岩灰和半焦三种物料进行了基本物性分析,并对其流态化特性进行了系统的冷模试验研究,结果表明:三种物料具有非球形、宽筛分和非正态分布等特点,其起始流化速度分别为:页岩粉约为0.043m/s,页岩灰约为0.04m/s,半焦约为0.032m/s;带出速度分别为:页岩粉和页岩灰约为0.7m/s,半焦约为0.55m/s。三种物料在流化过程中会出现床层的局部颗粒离析分层现象,床层密粒架桥、气体短路,从而导致流化极不均匀,在床层和提升管中均需要较高气速和循环量才能维持操作,度沿床层高度有所降低,床层密相密度为350kg/m^3~800kg/m^3;三种物料在流化过程中容易形成床层沟流和大颗与通常的FCC细粉流态化有很大区别。The basic physical properties of shale powder, shale ash and semi-coke were analyzed in the oil shale fluidized retorting process, and the fluidized properties were systematically tested by cold model. The results show that the three kinds of materials have non-spherical, wide particle size distribution and non-normal distribution characteristics. The minimum fluidization velocity all of three are, shale powder is about 0.043 m/s, shale ash is about 0.04 m/s and the semi-coke is about 0.032 m/s. The entrainment velocity are, shale powder and shale ash of about 0.7 m/s, and semi-coke of about 0.55 m/s. During the fluidization process, the localized particles are separated and stratified, and the bed density decreases along the bed height. The dense density of the bed is 350 kg/m^3 to 800 kg/m3. In the fluidization process, the three materials are easy to form bed channeling and large particle bridging, gas bypass, resulting in extremely uneven fluidization, requiring higher gas velocity and circulation in the bed and riser to maintain the operation. It is quite different from the usual FCC fine powder fluidization operation.

关 键 词：冷模试验 流化干馏 油页岩 流态化 

分 类 号：TE662.5[石油与天然气工程—油气加工工程]