China Nonferrous Metallurgy

Desulfurization process with hydrogen peroxide is widely applied in the field of tail gas treatment, but some projects indicate that such a process can easily cause the content of acid mist in the tails gas to exceed the standard. Therefore, this paper analyzes and discusses the generation mechanism of acid mist, properties of desulfurization process and acid mist control, and draws a conclusion as follows. As regards the properties of desulfurization process with hydrogen peroxide, it has an impact on the acid mist similar to other desulfurization processes, and acid mist converted from entrained liquid foam can be reduced by capture via the demister. To control the acid mist, on the one hand, the entrainment of acid mist should be lowered, while on the other hand, the capture of acid mist in the tail gas should be strengthened. Rear WESP applied to the desulfurization process with hydrogen peroxide can effectively achieve the removal of acid mist.