Abstract The deep desulfurization method of sintering flue gas based on the low-temperature oxidation method is studied. Based on the analysis of the main principle of deep desulfurization of sintering flue gas, a deep desulfurization system of sintering flue gas is constructed, which is composed of an absorption washing unit and a washing solution treatment unit. Sodium hydroxide solution is used as the desulfurizing absorbent to mix with the sintering flue gas entering the reaction tower. Sulfur dioxide in the sintering flue gas reacts with sodium hydroxide to generate sodium sulfite, and sodium sulfite is oxidized to produce sodium sulfate; ozone is produced by ozone generator, nitrogen oxide compounds are oxidized by ozone to generate oxyacid, which is easy to be removed by sodium hydroxide washing solution, and the detergent is the same as that used to remove sulfur dioxide and dust. The experimental results show that the highest desulfurization rate and denitrification rate of the proposed method are 90% and over 22%, and the reaction efficiency and economy are significantly better than that of the comparative method, which shows that the method is reasonable and effective.

中文翻译：

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基于低温氧化的钢铁厂烧结烟气深度脱硫

摘要 研究了基于低温氧化法的烧结烟气深度脱硫方法。在分析烧结烟气深度脱硫的主要原理的基础上，构建了由吸收洗涤单元和洗涤液处理单元组成的烧结烟气深度脱硫系统。氢氧化钠溶液作为脱硫吸收剂与进入反应塔的烧结烟气混合。烧结烟气中的二氧化硫与氢氧化钠反应生成亚硫酸钠，亚硫酸钠被氧化生成硫酸钠；臭氧由臭氧发生器产生，氮氧化物被臭氧氧化生成含氧酸，氢氧化钠洗液容易去除，清洁剂与用于去除二氧化硫和灰尘的清洁剂相同。实验结果表明，该方法的最高脱硫率和脱硝率分别为90%和22%以上，反应效率和经济性明显优于对比方法，表明该方法合理有效。