为提升管路内气体分布的均匀性，通过计算流体力学（CFD），采用RNG-k-ε湍流单相流模型对分布管内气体的三维流场进行数值模拟。通过分析模拟结果中三维流场的特点，对预分布管干路及支路的结构尺寸进行优化，使气体在各支路通量分布更均匀。在±50%操作通量波动下对优化后的气体与分布管进行测试，模拟结果显示气体在各操作通量下均分布较好。

Uniform distribution of gas to each cyclone separator has great effect on the operation of dust removal system.In the process of industrial dust removal,large-scale gas treatment requires parallel operation of multiple cyclone separators.Therefore,diameter-adjustable gas distribution pipe is often used for the connection and pre-distribution of parallel separators.In order to improve the uniformity of gas distribution in pipelines,RNG-k-ε turbulence single-phase flow model is used to simulate three-dimensional flow field of gas in the distribution pipe through computational fluid dynamics.Based on the characteristics of three-dimensional flow field in the simulation results,the structure and size of pre-distribution trunk and branch are optimized to make the gas flux distribution more uniform in each branch.The optimized gas and distribution pipe are tested under 50% operation flux fluctuation,and the simulation results show that gas distributes well under all operating fluxes.

陈建娟(1973-),女,硕士,高级工程师,研究方向为化学工程与工艺,chenjianjuan@sei.com.cn