垃圾焚烧炉CaO固氯反应动力学机理分析  

Analysis of Kinetic Mechanism of CaO Chlorine-fixing Reaction in Waste Incinerator

作　　者：黄声和 谢小明 HUANG Shenghe;XIE Xiaoming(Fujian Special Equipment Inspection and Research Institute,Fuzhou,Fujian 350008,China)

机构地区：[1]福建省特种设备检验研究院,福建福州350008

出　　处：《广东电力》2022年第11期115-121,共7页Guangdong Electric Power

摘　　要：为了分析CaO-HCl反应机理,使垃圾焚烧炉钙基脱氯成为可能,从CaO颗粒与HCl分子的实际反应过程出发,考虑生成物CaCl_(2)对CaO颗粒孔隙的影响,建立离散的收缩孔隙缩芯模型。该模型考虑生成的CaCl_(2)对后续CaO-HCl反应的影响,并对CaO颗粒与HCl分子的反应过程进行数值模拟。通过模型计算,分析不同反应温度、不同CaO颗粒粒径对CaO颗粒固氯效果的影响。模拟结果表明,CaO颗粒粒径在10-20μm、反应温度在1073-1273 K、反应时间在10 min时,CaO的转化率达到80%。因此,CaO颗粒粒径在20μm以下、反应温度在1073-1273 K范围内时,CaO颗粒固氯效果较为理想。In order to analyze the reaction mechanism of CaO-HCl,and make it possible realizing the calcium-based dechlorination of waste incinerators,this paper starts from the actual reaction process of CaO particles and HCl molecules,considers the influence of the product CaCl_(2) on the pores of CaO particles and establishes a discrete shrinkage pore shrinkage core model.The model considers the effect of the generated CaCl_(2) on the subsequent CaO-HCl reaction,and numerically simulates the reaction process of CaO particles and HCl molecules.By means of model calculation,the paper also analyzes the effects of different reaction temperatures and particle sizes of CaO particles on the chlorine fixation effect of CaO particles.The simulation results show that when the CaO particle diameters are 10-20μm,the reaction temperature is in the range of 1073-1273 K,and the reaction time is 10 min,the conversion rate of CaO reaches 80%.Therefore,the effect of CaO particles in fixing chlorine is ideal when the particle diameter of CaO particle is below 20μm and the reaction temperature is in the range of 1073-1273 K.

关 键 词：垃圾焚烧炉 CAO颗粒 固氯 收缩孔隙缩芯模型 反应动力学 

分 类 号：TM621.2[电气工程—电力系统及自动化] TQ03-3[化学工程]