【摘要】 研究垃圾组分PVC在焚烧过程中HCl的排放和脱除特性的实验在准等温、电加热的水平石英管反应器中进行 .随着床温从 70 0℃升高到 90 0℃ ,HCl的转化率从 82 5%平缓增加到 88 3% ,而过量空气系数的增加促使部分HCl转化为Cl2 ( 1 9%～ 4 5% )的形式存在 .钙基吸收剂CaCO3,Ca(OH) 2 ,Ca(CH3COO) 2 对HCl的脱除效率高达 68%～ 79% ,而镁基吸收剂的脱氯效率却低于 3% .小的吸收剂粒径、高的Ca/Cl比会促进脱氯效率的提高 ;烟气中CO2 和H2 O对脱氯效率的影响与它们在反应平衡中所起作用有关 .高温下燃烧固氯机理反应的平衡常数的计算不仅诠释了实验结果 ,而且提供了脱氯吸收剂选择的依据 .更多还原

【Abstract】 Incineration of chloridated plastic (PVC) in solid wastes contributes much to HCl pollutant in air environment.The characteristics of HCl emissions and reduction during PVC combustion were conducted in a nearly isothermal, externally heated, horizontal quartz\|tube reactor. With increasing temperature from 700 to 900℃, the conversion of HCl increased leniently from 82 5% to 88 3%. High excess air factor enhanced a small amount of HCl existing in form of Cl 2. The calcium based sorbents including CaCO 3, Ca(OH) 2, Ca(CH 3COO) 2 exhibited high HCl capture efficiencies from 68% to 79%, while magnesium based sorbent less than that of 3%. Influences of operational variables, i.e., size of sorbent, Ca/Cl molar ratio and combustion fume compositions, on the HCl reduction were discussed. From a point of view of equilibrium constant of dechloridization reaction the experimental results were explained in detail.更多还原