Regarding the upward and downward flow, as well as the downward and upward flow of regenerated gas
Thread Content
I would like to ask everyone: in molecular sieve dehydration regeneration units, what are the advantages and disadvantages of using regenerating gas with inlet at the bottom and outlet at the top, as well as inlet at the top and outlet at the bottom? What factors need to be considered when making a choice? Thank you!
Generally, backflush regeneration uses an upper-inlet and lower-outlet configuration; when the two towers are switched for use, if product gas is used for backflushing, this configuration helps to maintain the highest possible purity of the product gas at the top of the tower
Yes, because when a molecular sieve is adsorbing gases, it becomes saturated gradually in the direction of gas flow; by reversing the direction of gas flow for adsorption and desorption, it is possible to ensure that the bed layer is completely desorbed after the switch, thus maintaining normal purity levels.
The flow direction of the regenerated gas – whether it enters from below and exits from above or vice versa – is related to the flow direction of the adsorbed gas; it is preferable for them to be in opposite directions