摘要
利用数值模拟的方法,采用Reynolds应力输运模型和随机轨道模型,对一种卧式第三级旋风分离器实验装置内的湍流气粒两相流动进行了全尺寸的数值模拟,主要考察了不同的泄气率、各旋风单管等压力降和不等压力降对装置集尘室内排尘口附近的流动状况的影响。结果表明,各旋风单管的工作状态并不相同,并导致窜流返混的发生,影响了三旋的分离效率;此外,计算结果还表明,适度提高泄气率有助于抑制三旋单管间的窜流返混,为三旋的优化设计提供了理论依据。
By application of numerical modeling, Reynolds Stress Model （RSM） and random trajectory model, the full-dimensional numerical modeling of two-phase flow of turbulent-flow gas in a horizontal 3rd- stage cyclone separator pilot plant was performed. The impacts of different leaking gas rates, equilibrium pressure drops and un-equilibrium pressure drops of single cyclone separator pipe on the flow at the dust outlet of dust collector were studied. The study showed that the different working conditions of the cyclone separator pipes resulted in the formation of back-mixing of cross-flow, which affected the efficiency of the cyclone separator. Properly increasing the leaking gas rate was favorable for control of cross-flow back-mixing among the cyclone separator pipes. It provides a good theoretical basis for design optimization of cyclone separators.
出处
《炼油技术与工程》
CAS
北大核心
2008年第8期38-42,共5页
Petroleum Refinery Engineering
关键词
第三级旋风分离器
窜流
返混
泄气率
数值模拟
3rd-stage cyclone separator, cross flow, back mixing, leaking gas rate, simulation
