In this blog, Enviropol explained how companies can cut down the SO2 emission.
SO2 emissions are found mainly in the exhaust flue gas of fossils fuel-based Power Plants. With the construction of a large-scale Power Plant in India, the problem associated with a large volume of SO2 from a single Site begins to concern the public. SO2 emissions have serious health hazards. It causes irritation on the skin, eyes, nose, throat, and lungs. The higher exposure may create further complications like inflammation in the Respiratory System. Inhaling SO2 is very toxic and also can even cause death.
FGD i.e. Flue Gas Desulfurization is a set of technologies used to remove SO2 emissions from the environment. Stringent environmental regulations with respect to SO2 emissions have been enacted recently in India. SO2 can be removed from the gas stream by different methods mentioned below:-
- Wet scrubbing using a slurry of alkaline sorbent such as limestone, lime, caustic, and seawater to scrub the gases. This category is called wet FGDs.
- Spray – Dry scrubbing using similar sorbent and slurries called semi Dry Technology.
- Wet sulphuric acid process recovering sulfur in the form of commercial quality of sulphuric acid.
- Dry sorbent injection systems that introduced powdered hydrated lime or any other sorbent into the exhausting duct.
In end, we would like to state that the selection criteria for the most optimum technology in a particular process, largely depends on the usage of byproduct generated like gypsum or sodium sulfite. The most common technology which is used in the Power & Cement Plants is lime-based wet FGDs.
To know more, please check Enviropol.
