氢氧化钙对污泥燃烧过程中氯化氢释放特性的影响。
Effect of Ca(OH) on the Release Characteristics of HCl during Sludge Combustion.
作者信息
Xu Zhenghui, Tan Jiankang, Hu Chunhua, Fang Ping, Xiao Xiang, Huang Jianhang, Wu Haiwen, Tang Zijun, Chen Dongyao
机构信息
Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Resources Environmental & Chemical Engineering, Nanchang University, Nanchang 330031, China.
South China Institute of Environmental Sciences, the Ministry of Ecology and Environment, Guangzhou 510655, Guangdong, China.
出版信息
ACS Omega. 2020 Oct 15;5(42):27197-27203. doi: 10.1021/acsomega.0c03286. eCollection 2020 Oct 27.
With the addition of Ca(OH), the effects of combustion temperature, moisture, sludge particle size, and chlorine-containing additives on the removal of HCl during sludge combustion were studied. The experimental results showed that combustion temperature and moisture content promoted the formation of HCl and Ca(OH) played a key role in the formation of HCl during sludge combustion. Under the best conditions of a sludge particle size of 380-250 μm, moisture content of 5%, temperature of 850 °C, and Ca(OH)/sludge weight ratio of 3/10, the HCl capture efficiency was 79.81%. In addition, the effect of PVC on the production of HCl was greater than that of NaCl, probably because the lattice energy of NaCl was much higher, indicating that inorganic chlorine was not the main source of HCl. Ca(OH) can effectively inhibit the formation of HCl, which had practical guiding significance for the formation of HCl during the sludge combustion, especially the sludge containing chlorine.
添加Ca(OH)₂后，研究了燃烧温度、水分、污泥粒径和含氯添加剂对污泥燃烧过程中HCl去除的影响。实验结果表明，燃烧温度和水分含量促进了HCl的生成，且Ca(OH)₂在污泥燃烧过程中HCl的生成中起关键作用。在污泥粒径为380 - 250μm、水分含量为5%、温度为850℃、Ca(OH)₂/污泥重量比为3/10的最佳条件下，HCl捕集效率为79.81%。此外，PVC对HCl生成的影响大于NaCl，可能是因为NaCl的晶格能高得多，这表明无机氯不是HCl的主要来源。Ca(OH)₂能有效抑制HCl的生成，这对污泥燃烧过程中HCl的生成，尤其是含氯污泥中HCl的生成具有实际指导意义。
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