Wey M Y, Wu H Y, Tseng H H, Chen J C
Department of Environmental Engineering, The National Chung-Hsing University, Taiwan, ROC.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2003 May;38(5):975-89. doi: 10.1081/ese-120018605.
The research investigated the absorption/adsorption efficiency of sulfur dioxide (SO2), heavy metals, and polycyclic aromatic hydrocarbons (PAHs) with different Ca-based sorbents in a spray dryer during incineration process. For further improving the adsorption capacity of Ca-based sorbents, different spraying pressure and additives were carried out in this study. Experimental results showed that CaO could be used as an alternative sorbent in the spray dryer at an optimal initial particle size distribution of spraying droplet. In the spray dryer, Ca-based sorbents provided a lot of sites for heavy metals and PAHs condensing and calcium and alkalinity to react with metals to form merged species. As a result, heavy metals and PAHs could be removed from the flue gas simultaneously by condensation and adsorption. The additions of additives NaHCO3, SiO2, and KMnO4 were also found to be effective in improving the removal efficiency of these air pollutants.
该研究调查了在焚烧过程中，不同钙基吸附剂在喷雾干燥器中对二氧化硫（SO₂）、重金属和多环芳烃（PAHs）的吸收/吸附效率。为进一步提高钙基吸附剂的吸附能力，本研究采用了不同的喷雾压力和添加剂。实验结果表明，在喷雾液滴的最佳初始粒径分布下，CaO可作为喷雾干燥器中的替代吸附剂。在喷雾干燥器中，钙基吸附剂为重金属和PAHs的冷凝提供了大量位点，并且钙和碱度与金属发生反应形成合并物种。结果，重金属和PAHs可通过冷凝和吸附同时从烟气中去除。还发现添加添加剂NaHCO₃、SiO₂和KMnO₄可有效提高这些空气污染物的去除效率。
