FGD (Fume Gas Desulfuration) is only cosmically commercial desulfuration type in the world. It is dominating technology measure to control acid rain and sulfur dioxide pollution.

Wet limestone flue gas desulfurization technology is applied most widely for coal-fired power plants all over the world at present.

The installing dimensions of gas-gas heater (GGH)rotors in desulphurization systems of thermal power plants are exacting.