环境工程学报2011，Vol.5Issue(4)：865-870,6.
SCX型脱硫除尘器内部气固两相流场数值模拟
Numerical simulation for gas-solid two-phase flows in SCX dedusting and desulphurization scrubber
摘要
Abstract
Realizable k-ε turbulence model, discrete phase model ( DPM ) were used in the simulation of three-dimensional gas-solid flow in the SCX dedusting and desulphurization scrubber by using FLUENT package.The SIMPLE which is one type of pressure-velocity coupling algorithm was used in the calculation. The distributions of gas pressure and velocity at cross-section of z = 0 in the scrubber were analyzed deeply, the concentration distribution of different size particles and the particle trajectories were computed as well. The concentration distribution of particles with and without the influence of gravity were also researched. The simulation results show that there is the maximum pressure drop on the gas deflector, over 1 000 Pa. In inner-pipe, the vortex of gas is weak, and some backflows phenomenon are observed in the cone shell. The gravity barely influences the distribution of the fly-ash and the particle concentration in the lower part of cone shell in which there is the highest concentration is up to 0. 01 kg/m3. Furthermore, the simulation results are of major significance for the optimization design and practical operation.关键词
数值模拟/脱硫除尘/计算流体力学(CFD)/离散相模型(DPM)/气固两相流Key words
numerical simulation/ dedusting and desulphurization/ computational fluid dynamics(CFD)/discrete phase model(DPM)/ gas-solid two phase flow分类
资源环境引用本文复制引用
刘海,李彩亭,曾光明,张巍,高宏亮,覃海华..SCX型脱硫除尘器内部气固两相流场数值模拟[J].环境工程学报,2011,5(4):865-870,6.基金项目
国家自然科学基金资助项目(50878080) （50878080）
长沙市科技重大专项项目(K0902006-31) （K0902006-31）
