高温热解医疗垃圾酸性气化气吸收实验研究

Experimental Study of Absorption Acid Gasified Gas in Pyrolysis Medical Waste

针对高温热解医疗垃圾产生含HCl有害尾气引起的环境问题,依据化合反应原理,提出钙基吸收高温气化气中HCl气体的吸收系统。通过自行搭建的实验台,测试了吸附剂CaO吸收高温气化气中HCl的效率。在定模拟气体体积比以及流量的实验条件下,讨论了CaO层数、CaO粒径、气化气温度、气化气水蒸气含量对CaO吸附剂脱氯性能的影响。实验结果表明,当CaO吸收剂层数为3层,CaO粒径为8mm,气化气温度为500℃,脱氯效率最高,可达98%;实验范围内,水蒸气含量越高越有利于HCl的吸收。新型脱氯吸收装置不仅可以高效吸收高温模拟气化气中HCl,而且结构简单,操作便利。

In terms of the environment problem caused by noxious gas HCl in medical waste pyrolysis progress,an absorption system using calcium-based absorbent was introduced based on combination reaction principle. An experimental equipment was developed in order to get HCl absorption efficiency using absorbent Ca O. Under the constant gas volume rate and flow rate,the effect of the absorbent layer,Ca O particle size,gasified gas temperature and water vapor content on dechlorination efficiency had been analyzed. The experimental result showedthat the optimal absorption conditions of the absorbent layers were 3 layers,the particle size of Ca O was 8 mm,and gasified gas temperature was 500 ℃ and the highest dechlorination efficiency was 98%. Within the experimental operating parameter range,high water vapor content favored the HCl absorption. The new dechlorination absorption equipment is suitable to absorb HCl efficiently in high-temperature simulation gasified gas and its structure is simple as well.