| 固定床PVC燃烧脱氯的机理和试验 |
| 摘要点击 4871 全文点击 3789 投稿时间：2000-05-09 |
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| 中文关键词 PVC焚烧 HCl排放 燃烧脱氯 钙基吸收剂 |
| 英文关键词 HCl emission PVC incineration calcium based sorbents HCl capture |
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| 中文摘要 |
| 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700℃升高到900℃,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C12(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H2O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. |
| 英文摘要 |
| 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 Cl2. The calcium based sorbents including CaCO3, Ca(OH)2, Ca(CH3COO)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. |
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