the formation of foam or delta P is all the time? or when switching between drums? as is the delta P of the tower?, if all conditions of the amine is good, the generation of foam can be generated by condensation of hydrocarbons in the tower or the tower has high gas velocity or hydrocarbons in the tower (do you skimming the tower ?) or clogging of dishes
tell me you keep the temperature differential between the gas and the lean amine entering in the tower?
You can perform a field test with the amine , i mean, you take a sample in a bottle, shake and if the foam disappears in less than 15 seconds is not the amine that will generate the foam, which has the amine color and type amine use?
best regard Espana2005