Dry limestone technology

Shmigol I.N., Open JSC “VTI”

In dry limestone technology finely crushed lime – calk CaO or burnt lime Ca(OH)2 is used. It’s injected into the boiler convective shaft at a temperature range of about 850°C. The reagent binds sulfur dioxide:

CaO + SO2 + 1/2O2 = CaSO4;

Ca(OH)2 + SO2 = CaSO41/2H2O + 1/2H2O. Dry soda technology

Soda is a very active, but an expensive reagent. It is applied just as well as lime, but the SO2 catching effect achieved is higher in comparison with lime.