US 12,097,461 B2
Method for treating arsenic-containing flue gas
Guoqiang Chen, Beijing (CN); Senlin Tian, Yunnan (CN); Ping Ning, Yunnan (CN); Xiaosong Yang, Beijing (CN); Linan Shao, Beijing (CN); and Zhilong Zhao, Beijing (CN)
Assigned to BGRIMM TECHNOLOGY GROUP, Beijing (CN); and Kunming University of Science and Technology, Kunming (CN)
Filed by BGRIMM TECHNOLOGY GROUP, Beijing (CN); and Kunming University of Science and Technology, Kunming (CN)
Filed on Dec. 9, 2021, as Appl. No. 17/546,786.
Claims priority of application No. 202111066475.7 (CN), filed on Sep. 13, 2021.
Prior Publication US 2023/0080405 A1, Mar. 16, 2023
Int. Cl. B01D 53/00 (2006.01); B01D 5/00 (2006.01); B01D 46/02 (2006.01)
CPC B01D 53/002 (2013.01) [B01D 5/0021 (2013.01); B01D 5/0072 (2013.01); B01D 46/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for treating arsenic-containing flue gas, comprising:
subjecting the arsenic-containing flue gas to a dry pre-dedusting treatment, to obtain dedusted flue gas;
pre-cooling the dedusted flue gas and introducing the pre-cooled flue gas into a vortex quenching system to obtain high-temperature flue gas and low-temperature flue gas; and
subjecting the low-temperature flue gas to a gas-solid separation to obtain treated flue gas and arsenic trioxide,
wherein the pre-cooled flue gas has a residence time of 1 to 3 seconds in the vortex quenching system, and the low-temperature flue gas has a temperature of ≤150° C.