What is the working principle of desulfurization of desulfurization tower?

The working principle of desulfurization of desulfurization tower:

It is the use of desulfurization absorbent, through the way of chemical reaction, to achieve the effect of desulfurization. Desulfurization agent has surface activity, catalytic oxidation, promote the direct reaction of sulfur dioxide SO2, accelerate the dissolution of calcium carbonate CaCO3, promote the rapid oxidation of calcium sulfite CaSO3 into calcium sulfate CaSO4, strengthen the precipitation of calcium sulfate CaSO4, reduce the ratio of liquid to gas, reduce the ratio of calcium to sulfur and reduce the evaporation of water, the desulfurization tower is the use of this working principle to achieve the effect of desulfurization.

Internal structure:

The top layer is the exit flue and then mist eliminator rinse layer, two rinse layer, and then down is the spray layer, the spray layer of different towers with different number of layers, generally four layers of the majority, there are three layers, depending on the design of the amount of flue gas to be processed, and then down the inlet flue, and then down the slurry pool area, the spray layer to the point of overflow for the reaction area, the slurry pool area up to the bottom of the side of the tower with the agitator, generally at least three, agitators, and the tower side of the tower with the agitator, and the tower side of the tower with the agitator. Generally at least three, above the agitator is the oxidizing fan inlet pipe. There are a number of receiver ports on the wall of the whole absorption tower.