鼓泡流化床中局部不均匀结构与"三传一反"关系研究

项目名称： 鼓泡流化床中局部不均匀结构与"三传一反"关系研究

项目编号： No.21206159

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 化学工程及工业化学

项目作者： 侯宝林

作者单位： 中国科学院大连化学物理研究所

项目金额： 25万元

中文摘要： TFM（Two Fluid Model）双流体模型作为鼓泡流化床定向调控和定量放大模拟和分析的工具已得到了广泛关注。但由于TFM模型计算过程中将微元内丰富非均匀结构拟均匀化，从而导致其对实际过程中传递和反应行为的严重过估。本申请拟基于分解与合成的方法，将鼓泡流化床局部不均匀结构分解为多个拟均匀相，然后将各个拟均相中的动量、质量和能量传递加和，并耦合传递与反应的平衡方程，形成局部不均匀结构与"三传一反"的构效关系模型。通过将该反应局部不均匀结构参数影响的传递和反应模型嵌入到TFM模型中，提高TFM理论鼓泡流化床定向调控和定量放大模拟的准确性。使用一氧化碳铂催化氧化为模型反应，在表征局部不均匀结构动态变化同时表征其相际传递行为，检验和完善上述构效关系模型。以生物质制取乙二醇过程为工业应用背景，来检验和完善该理论和方法在工业过程强化和放大中的应用。

中文关键词： 流化床；多尺度；传递；动力学；生物质

英文摘要： TFM model has received popular attention for being employed as a tool of analyzing and simulating the process of directional adjustment and quantitatively scaling up of the bubbling fluidized bed. However, there are a great deal of heterogeneous structures in a calculating differential element, which have been treated as to be homogeneous in the TFM model, which led simulation results to seriously overestimate the process of transport and reaction in the real reactor. Based on the method of dividing and summarizing, the local heterogeneous structures in bubbling fluidized bed will be divided into several homogeneous structures in this appplication. And the relationships between the local heterogeneous structure and "transport phenomena and reaction" will be developed by summarizing the momentum, mass and heat transfer in every homogeneous structure and coupling with the balance equations between reaction and transport. The TFM theroy will be improved by implanting the transport and reaction model considering the influence of the heterogeneous structures parameters into TFM model. Thus, the accurance of TFM theory will be improved in simulating the process of directional adjustment and quantitatively scaling up of bubbling fluidized bed. In order to test and improve the above relationship model, measuring the in

英文关键词： Fluidized bed；multi-scale；transport phenomena；kinetics；biomass