公开(公告)号：US20230183920A1

公开(公告)日：2023-06-15

申请号：US17925478

申请日：2021-05-24

申请人： Valmet Technologies Oy

发明人： Naveen CHENNA ,  Tero JUUTILAINEN

IPC分类号： D21C11/08 ,  B01D53/58

CPC分类号： D21C11/08 ,  B01D53/58 ,  B01D2257/406 ,  B01D2251/506

摘要： A method for removing ammonia (NH3) from a gas produced in a pulp mill (100). The method comprises producing raw non-condensable gas comprising ammonia (NH3) in the pulp mill (100) and transferring at least some of the raw non-condensable gas to a scrubber (200) containing aqueous scrubbing solution (130, 140). The method comprises adding a compound capable of decreasing a pH of the scrubbing solution to the scmbbing solution (130, 140) and in the scrubber (200), contacting the raw non-condensable gas with the scmbbing solution (130, 140), to react the ammonia (NH3) of the raw non-condensable gas with the scmbbing solution to produce clean non-condensable gas and ammonium (NH4+). A pulp mill comprising equipment for performing the method.