【钙基脱硫的机理描述及炉内喷钙脱硫的研究】郑瑛.pdf

STUDYONDESULPHATION MECHANISMFORCALCIUM-BASEDSORBENTS AND DESULPHATIONBYINJECTING DRYCALCIUM-BASEDSORBENTSINTOBOILERFURNACE By ZhengYing Supervised 1by Professor Zheng Chuguang ADissertation Submitted totheDegreeEvaluationCommitteeof Huazhong University of Science andTechnology for the Degree of

华中理工大学博士学位论文 2考虑了CO2分压对烧速率的影响,利用线性关系对分解速率进行修正.3详细考虑了CO2在产物层孔隙内的扩散过程.4石灰石烧的同时,分解产物Ca0发生烧结。本文的模型同时考虑了般烧和烧结对分解产物比表面积的贡献,得到了比表面积的变化规律.多孔CaO与SO2反应是一个很复杂的气固反应,复杂性表现在SO2在CaO孔隙内的扩散过程。在第四章,首先对多孔CaO与SO2反应的机理进行了分析。随后建立了 CaO与SO2反应的新型的分布孔模型。

华中理工大学博士学位论文 surfacearea.ThereactionbetweenSOandporous CaOis avery complexreaction,which appears in mechanism of sulphation of CaO firstly;Then,builds a newpore size distribution model.The modelhassomefeaturesasfollows: porelengthalsoisinfinitesimal; 2Pore in each shell isintersected in physics,but