摘要
我国大气污染仍以煤烟型污染为主,主要污染物为烟尘、SO_2和NO_x。以NaClO_2为吸收剂,系统地总结了SO_2和NO_x在NaClO_2中的反应机理。发现NaClO_2在pH值3~4之间产生的黄绿色ClO_2气体具有很强的氧化能力,并且说明了NaClO_2溶液脱硝原理主要源于ClO_2把NO氧化成NO_2,而NO_2的进一步吸收通过N_2O_3和N_2O_4的水解完成。而SO_2在NaClO_2中的吸收过程主要受气膜控制,据此探讨吸收剂液相同时脱硫脱硝的工业可行性。
The principal contaminants in coal smoke are mainly smoke dust,sulfur dioxide(SO_2),nitrogen oxide(NO_x) and so on.The mechanism of the simultaneous desulfuration and denitration using NaClO_2 was systematically summarized.The yellow-green ClO_2 gas which was made by NaClO_2 at the pH3~4 was found having a strong oxidation.The denitrification of the NaClO_2 solution was showed depending crucially on ClO20 xidation which could oxidase NO to NO_2,and the further absorption of NO_2 was counted as the via hydrolysis of the N_2O_3 and N_2O_4,while SO_2 absorption process in NaClO_2 was a gas controlled reaction.Based on the study of desulfurization tower reconstruction,the paper discusses the desulfurization and industrial feasibility.
引文
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