There are several methods for desulfurization in thermal power plants. What is the principle of flue gas desulfurization?

There are many desulfurization methods.

(1) limestone-gypsum flue gas desulfurization process

Limestone-gypsum desulfurization process is the most widely used desulfurization technology in the world, and about 90% of flue gas desulfurization devices used in thermal power plants in Japan, Germany and the United States adopt this process.

(2) rotary spray drying flue gas desulfurization process

(3)

Flue gas desulfurization process by ammonium phosphate fertilizer method

(4) Lime spraying in the furnace and tail humidification flue gas desulfurization process.

(5) Flue gas circulating fluidized bed desulfurization process

(6) Seawater desulfurization process

(7)

Electron beam desulfurization process

(8) Ammonia washing desulfurization process

Desulfurization after combustion, also known as flue gas desulfurization (flue

gas

Desulfurization (FGD for short), in FGD technology, according to the types of desulfurizers, can be divided into the following five methods: calcium method based on CaCO3 (limestone), magnesium method based on MgO, sodium method based on Na2SO3, ammonia method based on NH3 and organic alkali method based on organic alkali. The commercial technology widely used in the world is calcium method, accounting for more than 90%.