Falling film Absorber Goel Scientific Glass Works Ltd
Efficient gas absorption depends on the following:
1. Intimate contact
2. Efficient Heat Transfer
This is achieved in a Falling Film Absorber which is essentially a shell & tube heat exchanger in which both gas to be absorbed and absorbing liquid flow co-currently downward with the extraction of heat by circulation of coolant in the shell.
The absorbing liquid is circulated through a tank till desired concentration is achieved. The liquid flows at such a rate that the tubes do not flow full of the liquid but instead, descend by gravity along the inner walls of the tubes as a thin film.
Obviously, this produces a much greater linear velocity for a giver rate flow than could be obtained if the tube flowed full.
The equipment works as a number of water-cooled-wall columns in parallel and each tube is provided with a distribution system on top to effect uniform distribution of both liquid and gas and also the formation of a thin liquid film on the inner surface of the tube.
|Sr. No.||Nominal Size (mm)||Absorber Area (m2)||No. Of Tubes/Tube OD (mm)||Max. Gas Absorption Rate (Pure HCL)* (Kg/hr)||Max. Acid Prod. Rate (As 30% HCL)( Kg/hr)||Height (m)|