CaO脱硫化学反应速率与气体扩散速率对比  

COMPARISON OF KINETIC REACTION RATE AND DIFFUSION RATE DURING DRY FGD REACTION WITH CAO PARTICLES

作　　者：王世昌 姚强[2] 徐旭常[2] 

机构地区：[1]华北电力大学动力工程系,北京102206 [2]清华大学热能工程系热能动力工程与热科学重点实验室,北京100084

出　　处：《工程热物理学报》2006年第z2期219-222,共4页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展规划资助项目(No.G19990222)

摘　　要：区分氧化钙脱硫反应中的化学反应动力学速率与二氧化硫、氧气分子的扩散速率是一个难题。通过系列样品的TGA实验,在简化假设的基础上找到了CaO颗粒脱硫反应中的化学反应动力学速率与二氧化硫、氧气分子的扩散速率的变化规律。实验结果表明:化学反应速率和二氧化硫、氧气分子的扩散速率随着反应温度的上升、脱硫剂颗粒粒径的降低和氧化钙纯度的提高而提高。适当提高脱硫反应温度、最大限度地降低颗粒粒径是提高氧化钙脱硫反应速率的主要措施。It is difficult to distinguish the kinetic reaction rate from the diffusion rate of SO2 and O2 molecules during the Dry FGD reactions. This paper study the kinetic reaction rate and the diffusion rate of SO2 and O2 molecules through TGA experiments of a series of CaO samples, on the basis of simplifications and assumption. The experimental results indicated that the kinetic reaction rate and the diffusion rate of SO2 and O2 molecules increased with the increasing reaction temperature, decreasing particle diameter and the rising of CaO purity of absorbents. Increasing reaction temperature to a proper extends and decreasing the particle diameter as much as possible are the most effective measurements to improve the reaction rate of Dry FDG reaction with CaO particles.

关 键 词：干法烟气脱硫 氧化钙颗粒 化学反应动力学速率 扩散速率 

分 类 号：TK16[动力工程及工程热物理—热能工程]