流化床烟气脱汞气固两相流动的可视化研究与数值模拟  

Visible Investigation and Numerical Simulations on Gas-Solid Two-Phase Flow for Flue Gas Mercury Removal in Fluidized Bed

作　　者：黄朔[1] 赵兵涛[1] 钟美[1] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《上海理工大学学报》2016年第4期329-334,共6页Journal of University of Shanghai For Science and Technology

基　　金：国家自然科学基金资助项目(50806049);上海市自然科学基金资助项目(08ZR1415100);沪江基地建设基金资助项目(D14001)

摘　　要：为了探究流化床烟气脱汞反应器内气固两相的流动过程,通过可视化显形实验对不同主流化风速、床层物料高度、颗粒粒径和活性炭喷口速度下反应器内气固流动的行为和特征进行了研究.通过计算流体动力学方法对气固两相流动过程进行了数值模拟,并与实验进行比较.结果表明,数值模拟具有流动模拟的可靠性.主流化风速增加或颗粒粒径减小,均会加剧气固两相流动的剧烈程度,活性炭喷口气流会造成气固两相的局部湍动,但床层物料高度由于受到壁面与颗粒的摩擦力和内部气泡大小的综合作用,对气固流动行为的影响不显著.In order to explore the process of gas-solid two-phase flow in a fluidized bed mercury removal reactor,visual experiments were carried out. The experiments were performed at different fluidized velocities, bed material heights, quartz sand particle sizes and activated carbon （AC） nozzle air velocityies. The gas-solid flow characteristics in the reactor were simulated by the computational fluid dynamics method and compared with the experiment results. The results indicate that the simulation model is of the reliability for flow simulation. The increase of inlet air velocity or the decrease of quartz sand particle size is beneficial to promote the violent degree of gas-solid two-phase flow. The AC nozzle air velocity can make the local turbulence in reactor. Under the synthetic action of friction between walls and particles and the bubbles size, the bed material height can hardly influence the two-phase flow.

关 键 词：流化床反应器 烟气脱汞 两相流动 可视化 数值模拟 

分 类 号：TK16[动力工程及工程热物理—热能工程]