基于等效沉降速度粒径的旋风分离器性能表征研究  

Experimental research on cyclone efficiency based on equivalent settling velocity particle diameter

作　　者：刘秀林[1] 陈建义[1] 陈功 

机构地区：[1]中国石油大学(北京)重质油国家重点实验室,北京市102249 [2]中国石油大学(北京)过程流体过滤与分离技术北京市重点实验室,北京市102249

出　　处：《炼油技术与工程》2017年第4期42-47,共6页Petroleum Refinery Engineering

基　　金：国家自然科学基金项目(21176249)

摘　　要：选取粉煤灰、硅微粉、滑石粉与重晶石粉4种物性不同的颗粒物,分别用激光粒度仪与离心沉降粒度仪对颗粒物进行测量并比较基于不同等效原理的粒度分布;用粉煤灰与硅微粉在直径为300 mm的标准PV型旋风分离器上进行性能实验,测得基于不同等效粒径的粒级效率;参考颗粒物大小、密度和形状等影响分离的物理性质提出等效沉降速度粒径的概念,并用其作为基准来表征粒级效率。结果表明:相同的操作条件下,颗粒的等效沉降速度粒径相同,则其分离效率相等。最后用滑石粉与重晶石粉进行实验,验证了以上结果,说明颗粒的等效沉降速度粒径可以准确表征颗粒的旋风分离能力,为旋风分离器的工程设计和应用提供了依据。Four kinds of particles i.e. coal fly ash, silica powder, talcum and barite are selected and measured by centrifugal settling particle size analyzer and laser particle size analyzer to compare the particle size distribution based on different equivalent particle diameters. The performance experiments of coal fly ash and silica are carried out on the PV cyclone separator （D = 300 mm） to show the fractional efficiency of different equivalent particle diameters. The equivalent settling velocity particle diameter is put forward to characterize the fractional efficiency. The result shows that the efficiencies of different kinds of particles which have the same equivalent settling velocity particle diameter are equal under the same operating conditions. Finally, this theory is verified by the repeated experiments carried out with talcum and barite. This indicates that the equivalent settling velocity particle diameter is satisfactory to feature the separation ability of particles. And this new concept provides the guideline for the engineering design and application of cyclone separator.

关 键 词：旋风分离器 非球形颗粒 粒级效率 等效沉降速度粒径 

分 类 号：TQ051.8[化学工程]