Process flow and principle of desulfurization in power plant

Technical principle of desulfurization process:

The flue gas enters the wet absorption tower of the desulfurization device and contacts with the droplets of alkaline limestone slurry injected from top to bottom, so that the acid oxide SO2, HCL, HF and other pollutants are absorbed and the flue gas is fully purified; CaSO _ 3 is generated by the reaction of the slurry after absorbing SO2, and CaSO _ 4 is generated by in-situ forced oxidation crystallization. 2H2O, and after dehydration, gypsum, a by-product of commercial desulfurization, was obtained, and finally the comprehensive treatment of sulfur-containing flue gas was realized.

Power plant desulfurization process flow chart:

Extended data:

Desulfurization generally refers to the desulfurization process before combustion and flue gas emission. It is one of the important technical measures to prevent and control air pollution.

At present, there are three desulfurization methods: desulfurization before combustion, desulfurization during combustion and desulfurization after combustion. With the development of industry and the improvement of people's living standards, the thirst for energy is increasing day by day, and SO2 in coal-fired flue gas has become the main cause of air pollution. Reducing SO2 pollution has become an urgent task for atmospheric environment control. Many flue gas desulfurization processes have been widely used in industry, and also have important practical significance for tail gas treatment of various boilers and incinerators.

References:

Desulfurization-Baidu Encyclopedia