Nature protection technologies

1.3.2.2. - 1.3.2.3. Dry limestone and soda technology

Part 1. AIR PROTECTION FROM POWER INDUSTRY EMISSIONS

1.3. Sulfur oxide emission reduction

1.3.2. Technologies of sulfur oxide emission reduction
1.3.2.2. Dry limestone technology

1.3.2.3. Dry soda 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.

1.3.2.3. 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.