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[Chemical Knowledge]：Dry desulfurization principle: environmentally friendly and efficient sulfide treatment technology

Read： 591 Time：14months ago Source：Transform the World with Simplicity

With the rapid development of social economy, air pollution is becoming more and more serious, and the problem of atmospheric governance has become the focus of global attention. Among them, sulfide emission is one of the pollutants that seriously threaten air quality. Under certain conditions, it can form sulfuric acid mist, fine particles and other secondary pollution harmful to health. In order to effectively reduce the concentration of SO2 in the exhaust gas and curb the excessive emission of sulfide, dry desulfurization technology came into being. The principle of

dry desulfurization technology is based on the dry denitration transformation, mainly through the way of reactant spray, let the reaction liquid evenly spray in the exhaust gas flow, react with the SO2 to generate sulfide, and fix it in the reaction liquid to form granular or crystalline sulfide, so as to achieve the purpose of desulfurization. Compared with the traditional wet desulfurization, dry desulfurization does not need to wash the desulfurizer, thus avoiding the problem of washing wastewater discharge, while waste treatment is more convenient, dry desulfurization waste can also be recycled, taking into account environmental protection and economic benefits.

In the reaction process of dry desulfurization, the rate of wetting the particle surface by the reaction solution plays an extremely critical role in the efficiency. In general, it is important to improve wetting by selecting a reactant that can form good wetting properties. In addition, in order to ensure the desulfurization efficiency, the amount of the reactant used should be appropriately matched with the flow rate of the exhaust gas, and is usually controlled within the range of 2-6%.

dry desulfurization is mainly suitable for the treatment of sulfides in organic chemistry, electric power, metallurgy and other industries, especially in thermal power plants, welding plants, steelmaking plants and other thermal manufacturers. Dry desulfurization technology has many advantages such as simple structure, less use of reactants, and less waste residue generation. With its characteristics of environmental protection, high efficiency and energy saving, it has become a standard technology that must be mastered in the field of atmospheric governance.

In the future, with the increasing awareness of environmental protection, the application scope of dry desulfurization technology will be further expanded, and it will play an increasingly important role in controlling air pollution and protecting the ecological environment.

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