Stainless steel desulfurization tower is a commonly used desulfurization equipment, which is widely used in industrial fields such as coal-fired power plants. In the desulfurization process, a variety of chemical reactions and reaction kinetics are involved.
1. Chemical reaction.
1.Wet desulfurization reaction.
Wet desulfurization mainly uses detergents to react with SO2 in flue gas to produce sulfate. Commonly used detergents are limestone slurry, gypsum slurry, etc. The reaction equation is as follows:
caco3 + so2 + 2h2o → caso4·2h2o + co2
During the reaction, CaCO3 in limestone slurry reacts with SO2 to form CaSO4·2H2O, and CO2 is released into the air at the same time.
2.Catalyst desulfurization reaction.
Catalyst desulfurization is mainly through the reaction of catalysts with SO2 to produce sulfate. Commonly used catalysts are V2O5, MoO3, etc. The reaction equation is as follows:
v2o5 + 2so2 + o2 → 2so3 + v2o4
Catalyst desulfurization is generally carried out at a higher temperature, and the reaction rate is relatively fast, which can efficiently remove SO2 from the flue gas.
2. Reaction kinetics.
1.Kinetics of wet desulfurization reactions.
The reaction rate of wet desulfurization is affected by a variety of factors, such as reaction temperature, detergent concentration, gas flow rate, etc. Normally, the reaction rate increases with increasing temperature, but too high a temperature decreases the reaction rate. The higher the detergent concentration, the faster the reaction rate. An increase in the gas flow rate can increase the mass transfer rate and facilitate the reaction.
2.Catalyst desulfurization reaction kinetics.
The desulfurization reaction rate of catalyst is affected by factors such as catalyst activity, reaction temperature, and gas concentration. The higher the catalyst activity, the faster the reaction rate. An increase in the reaction temperature can speed up the reaction rate, but too high a temperature can cause the catalyst to be deactivated. An increase in the concentration of the gas can facilitate the reaction.
The chemical reactions and reaction kinetics involved in the desulfurization process of stainless steel desulfurization tower are complex and important research contents. Only by studying these contents in depth can we better optimize the desulfurization process, improve the desulfurization efficiency and reduce the impact on the environment.