Introduction to flue gas desulfurization and denitrification

At present, there are many types of flue gas desulfurization methods at home and abroad, mainly divided into two categories: dry (or semi-dry) and wet. The vast majority of wet desulfurization processes use alkaline slurry or solution as absorbent. The technology is relatively mature and is currently the most widely used flue gas desulfurization technology. According to the different types of absorbents, it can be divided into limestone-gypsum method (calcium method), two-alkali method, ammonia method, sea water method, etc. The most commonly used flue gas denitration technology is selective non-catalytic reduction (SNCR) and selective catalytic reduction (SCR). The emergence of an integrated process for flue gas desulfurization and denitrification has aroused widespread concern in various countries. At the same time, the desulfurization and denitration technology can achieve desulfurization and denitration in the same system. It has the advantages of simplified equipment, small floor space, low capital investment, convenient management and low production cost.

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