水蒸气对氧化钙脱氯效率影响的实验研究

AN EXPERIMENTAL STUDY OF THE EFFECT OF STEAM TO HCI REMOVAL EFFICIENCY BY CaO

本文采用实验方法,在一个流化床反应器中研究160～750℃下水蒸气的存在对HCl脱除效率(RE)的影响。实验结果表明:在低温区,水蒸气对RE的影响不明显;380℃时水蒸气的存在抑制反应进行;580℃和750℃时,脱除效率先下降,当水蒸气含量达到15%时,又呈现上升趋势。对于水蒸气含量为5%、10%和15%情况下,580℃的脱氯效率最高。最后通过对暴露的反应物表面积和HCl气体穿越产物层扩散过程的分析解释实验得到的规律。

In this paper, the effect of steam to HCl removal has been investigated in the temperature range from 160℃ to 750℃ in a fluidized-bed incinerator. The results show that： at 160℃, the effect of steam is not obvious. As the steam concentration increases, the RE decreases at 380℃. At 580℃ and 750℃, the RE decrease at the steam concentration of 5% and 10% and increase at 15%. It also reveals that CaO react more completely at 580℃ than other temperatures in the steam concentration of 5%, 10% and 15%. It explains that the reaction process depends on the exposed surface area of the reactants and the diffusion process of gaseous HCl through the product layer.