The column is constructed with a series of packed sections, a gas introduction point below that, a condenser on the top, and a cooler at the bottom. Make water is sprayed from the top and acid is collected from the bottom.
HCL absorption columns are available in 80DN to 300DN diameter (for the gas rate 10 Kgs/hr to 300 Kgs/hr approx.)
|Packed Column||Condenser HTA (m2)||Gas Rate (Approx.)||CAT. REF.|
HCL absorption columns are used for absorption of Hydrochloric gas which statutorily is not permitted to vent into the atmosphere, and to produce the HCl acid.
Hydrogen Chloride is very soluble in water but its absorption is complicated by the high heat of solution and the high partial pressure over warm concentrated solutions. In practice, the basic problem in making concentrated solutions is one of efficient heat removal. In this type of absorber, the heat of absorption is removed by evaporation of water and acid in the column. The vapor being condensed is diluted with ‘makeup’ therefore mostly removed via the condenser. Concentration and cooling of the liquid phase are assisted by evaporation of water to maintain the vapour/liquid equilibrium in the lower part of the packed section.