多管水力除砂器内液-固两相流的数值模拟  

Numerical Study on Liquid-Solid Two-Phase Flow in a Multi-Tube Hydrocyclone Desander

作　　者：高光才[1] 赵英亮 王建军[1] 金有海[1] 

机构地区：[1]中国石油大学(华东)化学工程学院,山东青岛266580

出　　处：《高校化学工程学报》2017年第3期561-569,共9页Journal of Chemical Engineering of Chinese Universities

基　　金：山东省自然科学基金项目(ZR2015EM026)

摘　　要：通过数值模拟的方法,采用RSM湍流模型对多管式水力除砂器内液-固两相流场进行了研究。研究表明:进液室的流场分布、压力分布影响各单管入口流量及速度分布;除砂器内颗粒运动的轨迹包括储料室捕集和集液室逃逸;将1000个颗粒同时射入除砂器总入口,跟踪每个颗粒得到颗粒的入管比例和分离效率,单管的颗粒入管比例与流量呈正相关,单管分离效率受速度分布影响出现差异;随着颗粒粒径增大,从单管分离出的颗粒在储料罐内的沉降速度也增大;综合各单管的颗粒入管比例和分离效率对除砂器分离系统的结构提出改进方向。Reynolds Stress Model（RSM） was used to simulate liquid-solid two-phase flow in a multi-tube hydrocyclone desander. The results show that the inlet flow rate and velocity distribution of every single hydrocyclone are affected by flow field and pressure distribution of feed chamber. Particle trajectory in the desander includes those trapped in dust storage tanks and escaped from bleeder tubes. 1000 particles were injected into the desander, and particle inlet proportion and separation efficiency in every single hydrocyclone were calculated. The results show that particle inlet proportion in single hydrocyclone is proportional to flow rate, and separation efficiency is affected by velocity distribution. The terminal settling velocity of separated particles in the dust storage tank increases when particle diameter increases. The simulation results provide possible guideline for structural improvement of multi-tube hydrocyclone desanders.

关 键 词：多管式 除砂器 两相流 分离 数值模拟 粒级效率 

分 类 号：TQ051.8[化学工程]