Flue Gas Desulfurization

In many steel plants, power plants and industrial boilers based on coal, as a result of pet coke (or other forms of coal) burning, a residual Sulphur Dioxide SO2 is produced which is very harmful for the environment. As a result, this type of corporates must establish a flue gas desulfurization system to reduce SO2 emissions for the sustainable development of the environment.

In wet FGD (flue gas desulfurization) system, the flue gas is passed through specially designed a FGD scrubber, which use lime and caustic solution as solvents to de-sulfurize the flue gas in two stages.

The primary stage includes a Venturi Eductor Nozzle section operating with lime followed by the final scrubbing with caustic solution using multi stage tray/spray tower, spray tower is spray header by using some large-flow spiral nozzles or tangental-flow hollow cone nozzles from RELAB.

The clean and de-sulphurised gas is then reheated using steam heater, mounted on top of the tray tower as an optional device before exit to the atmosphere through integrated stack.

The effluent generated is processed for de-watering for sludge disposal or for byproduct recovery in the form of saleable Gypsum/Sodium Sulphate.

To provide good contact between the waste das and sorbent, It is very important to choose a suitable FGD nozzle, determine the installation position of the nozzle, and how to arrange the nozzle.