化工学报Issue(2)：494-503,10.DOI:10.11949/j.issn.0438-1157.20151253
气固搅拌流化床中压力脉动特性
Pressure fluctuation in gas-solid agitated fluidized bed
摘要
Abstract
Gas-solid agitated fluidized beds can be used to improve the fluidization performance of sticky polymer particles. Experimental pressure fluctuation signals were analyzed with statistics analysis, power spectrum analysis and wavelet analysis for investigating the influence of agitation speeds and types of agitators on the fluidization characteristic. Due to the effects of suppression and breakage on bubbles caused by agitation, lower pressure fluctuation amplitude and smaller bubbles were found in the agitated fluidized bed compared to general fluidized bed. The synergy between gas flow and agitation occurred in the agitated fluidized bed. For a gas-solid fluidized bed with an anchor impeller or a frame impeller, sufficiently high agitation speed was needed to improve fluidization performance. However, for self-cleaning agitator, higher agitation speed engendered adverse phenomena of gas short circuit and particles accumulation near the blades. Therefore, the feasible agitation speed was recommended for extending the application of the new self-cleaning agitator in industry.关键词
流化床/搅拌/压力脉动/统计分析/多相流/聚结Key words
fluidized bed/agitation/pressure fluctuation/statistics analysis/multiphase flow/coalescence分类
化学化工引用本文复制引用
张永俊,王嘉骏,顾雪萍,冯连芳..气固搅拌流化床中压力脉动特性[J].化工学报,2016,(2):494-503,10.基金项目
国家自然科学基金项目（21276222）；化学工程联合国家重点实验室开放课题资助项目(SKL-ChE-13D01)；国家高技术研究发展计划项目（2012AA040305）。@@@@supported by the National Natural Science Foundation of China (21276222), the State Key Laboratory of Chemical Engineering (SKL-ChE-13D01) and the National High Technology Research and Development Program of China (2012AA040305) （SKL-ChE-13D01）
