| 李旺， 王东祥， 付爽.喷动流化床内颗粒团聚结构与分布规律研究[J].轻工机械,2023,41(4):52-60 |
| 喷动流化床内颗粒团聚结构与分布规律研究 |
| Agglomeration Structure and Distribution Rule of Particles in Spouted Fluidized Bed |
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| DOI：10.3969/j.issn.1005 2895.2023.04.007 |
| 中文关键词: 喷动流化床 B类颗粒 控制变量法 团聚结构 团聚分率 |
| 英文关键词:spouted fluidized bed class B particle control variable method reunion structure agglomeration fraction |
| 基金项目:国家自然科学基金资助项目(51606086) ；中国博士后科学基金项目(2017M621624)。 |
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| 中文摘要: |
| 为揭示湍动流化过程中颗粒团聚的基本结构，课题组基于矩形喷动流化床对B类颗粒进行试验研究。该实验平台利用控制变量法分析了操作条件、颗粒性质和沿层高度对团聚现象的影响，并提出以颗粒团聚分率来量化颗粒团聚程度。结果表明：床内分别出现了倒U形、U形、环核型、带状和网状5种典型的颗粒团聚结构；颗粒团聚分率随静止床高、颗粒直径的增加而增大；固定总表观气速，增大喷动气速，团聚分率呈现先减小后增大趋势；增大喷口宽度，团聚分率呈现出“S”型变化趋势；其沿床高则表现出先减小后增大的趋势。该研究对应用湍动流化气固流动结构的工业生产过程提供了实验依据。 |
| 英文摘要: |
| In order to reveal the basic structure of particle agglomeration during turbulent fluidization, the experimental research on class B particles was conducted based on rectangular spray fluidized bed. The influence of operating conditions, particle properties, and layer height on the agglomeration phenomenon was analyzed by using the control variable method, and the particle agglomeration fraction was proposed to quantify the degree of particle agglomeration. The results show that there are five typical particle agglomeration structures in the bed, including inverted U shape, U shape, ring karyotype, band and network. The degree of particle agglomeration structure increases with the increase of static bed height and particle diameter. When fixing the total apparent gas velocity and increasing the injection gas velocity, the agglomeration fraction decreases first and then increases. With the increase of the nozzle width, the agglomeration fraction presents an “S” shaped trend, while the bed height ultimately shows a decreasing trend followed by an increasing trend. The study provides an experimental basis for the industrial production process using turbulent fluidized gas solid flow structure. |
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