Thanks for the good content as usual, do we expect to have H2S in the gas flow from the degassing drum (I know pH is low so no NH3 is expected). Also, I am curious about the pressure selection of NH3 stripper, currently working on design of an ammonia steam stripper and 2 suppliers recommended a low pressure (slight Vaccum).
Thank you for feedback! The H2S could be present in flash stream from degassing vessel and regarding the operating pressure of NH3 stripper should be around 9-10 barg with the main ideea to keep NH3 in water! Why? Very simple, because in 2 columns configuration the H2S will be stripped from 1st column and NH3,in 2nd - this is the main difference between single NH3 stripper vs 2 strippers and for this slightly vacuum is recommended for NH3 tower! The main goal with 2 strippers is to obtain separate H2S and NH3 as stripped from water while using only 1 tower if they will be mix and the lower the pressure the essy/better the stripping!
Thanks for the good content as usual, do we expect to have H2S in the gas flow from the degassing drum (I know pH is low so no NH3 is expected). Also, I am curious about the pressure selection of NH3 stripper, currently working on design of an ammonia steam stripper and 2 suppliers recommended a low pressure (slight Vaccum).
Thank you for feedback! The H2S could be present in flash stream from degassing vessel and regarding the operating pressure of NH3 stripper should be around 9-10 barg with the main ideea to keep NH3 in water! Why? Very simple, because in 2 columns configuration the H2S will be stripped from 1st column and NH3,in 2nd - this is the main difference between single NH3 stripper vs 2 strippers and for this slightly vacuum is recommended for NH3 tower! The main goal with 2 strippers is to obtain separate H2S and NH3 as stripped from water while using only 1 tower if they will be mix and the lower the pressure the essy/better the stripping!