摘要
为了提高气化炉洗涤冷却室内合成气洗涤热质的传质效果,采用数值模拟技术,研究了液池结构及液池内分隔板对气泡特性的影响。以气化炉液池内气液两相流动过程为研究对象,通过气液两相流动数值模拟实验平台,重点研究了分隔板对气泡特性的影响。基于图像处理技术,从数值计算结果中提取液池内气泡湿周信息,揭示了液池内分隔板对气泡湿周特性的影响,探讨了分隔板结构及分布的优化。结果表明:分隔板能有效增大气泡湿周,减小液位波动;其安装位置不宜太高,合理选择板上孔隙的大小及数量有利于优化气泡特性;分隔板交叉布置比平行布置更有利于均匀分布气泡。
To improve the mass transfer efficiency of scrubbing-cooling chamber of gasifier, study the influence of gasifier pool＇s structure and demarcation plates in liquid pool on gas-liquid two-phase flow characteristics. Through numerical simulation experiments ,focus on the influence of demarcation plates. Based on the image processing tech- nology, obtain wetted perimeter data from numerical simulation results, which well illustrates the specific impact of demarcation plates. Also discuss how to better utilize the distribution of demarcation plates. The results show that the demarcation plates can obviously increase wetted perimeter, reduce liquid level fluctuation. The demarcation plates shouldn＇t be installed too high. Proper size and number of pores helps to utilize bubber characteristics. The crossed demarcation plates are more beneficial to distributing uniformly bubble than the parallel demarcation plates.
出处
《洁净煤技术》
CAS
2012年第3期84-88,共5页
Clean Coal Technology
基金
国家自然科学基金资助项目(51166010)
国家重点基础研究发展规划(973计划)(2004CB217700)
东北电力大学博士科研启动基金(BSJXM-201201)
关键词
气化炉
气液两相流
洗涤冷却室
湿周
分隔板
液池
数值模拟
gasifier
gas-liquid two-phase flow
scrubbing-cooling chamber
wetted perimeter
demarcation plate
gasifier pool
numerical simulation
