公开(公告)号：US20200299207A1

公开(公告)日：2020-09-24

申请号：US16821043

申请日：2020-03-17

Applicant: Kunming University of Science and Technology

Inventor： Ping NING ,  Senlin TIAN ,  Jianhong HUANG ,  Qin ZHANG ,  Xuewei HU ,  Bin LI

IPC: C05G3/80 ,  C09K17/08 ,  C05F5/00 ,  C05F3/00 ,  C05C9/00 ,  C05G1/00 ,  B01D53/50 ,  B01D53/80 ,  A01C21/00 ,  A01C23/00

Abstract: The present invention discloses a method for ammonium-enhanced flue gas desulfurization (FGD) by using red mud slurry. The method specifically includes: crushing red mud, sieving the crushed red mud, slurrying the red mud, conducting aeration treatment, adding an ammonium salt and/or ammonia, and conducting natural sedimentation to obtain pretreated red mud slurry and pretreated red mud liquor; adding an ammonium salt and/or ammonia to the slurry, adding water and conducting uniform mixing, conducting pre-FGD, conducting deep desulfurization on treated flue gas by using the pretreated red mud liquor, and directly discharging desulfurized flue gas; and charging the pretreated red mud slurry and the pretreated red mud liquor obtained after the treatment to a replacement tank below, adding lime milk to the replacement tank, conducting stirring and natural sedimentation, conducting soilization on subnatant thick red mud slurry, and refluxing the supernatant to a red mud aeration tank.