Title:
SYSTEM AND METHOD FOR DESULFURIZATION AND DENITRIFICATION OF ALUMINA CALCINATION FLUE GAS, AND USE
Document Type and Number:
WIPO Patent Application WO/2019/119660
Kind Code:
A1
Abstract:
Disclosed are a system and a method for desulfurization and denitrification of an alumina calcination flue gas, and a use. The system comprises an ozone generator (1), a red mud pre-impregnation slurry scrubbing tower (3), and a red mud pre-impregnation tank (5) and a red mud pre-impregnation clear liquid scrubbing tower (10). NO x in a flue gas is oxidized into a high valence oxynitride by ozone, and with the red mud as an absorbent, the synergistic absorption of SO 2 and NO x in the flue gas is achieved, while the dealkalization of the red mud is achieved. By means of the synergistic catalytic oxidation of metal ions such as Fe 3+ in a red mud slurry and ozone, the synergistic absorption of sulfur and oxynitride is promoted and the material consumption of the subsequent desulfurization and denitrification is reduced; and the use of a structure of staged absorption in two towers overcomes the problem of the difficulty in absorbing NO 2 with a low O 3/NO X molar ratio by enhancing absorption with sodium alkali in a second stage tower, while decreasing the consumption of and risk of escape of the ozone, wherein same has the advantages of a high purification efficiency and a low operation cost, and has a stronger applicability to the alumina calcination flue gas.
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Inventors:
ZHU TINGYU (CN)
LIU XIAOLONG (CN)
WANG XUE (CN)
NING RULIANG (CN)
LIU XIAOLONG (CN)
WANG XUE (CN)
NING RULIANG (CN)
Application Number:
PCT/CN2018/079647
Publication Date:
June 27, 2019
Filing Date:
March 20, 2018
Export Citation:
Assignee:
INST PROCESS ENG CAS (CN)
International Classes:
B01D53/86; B01D53/50; B01D53/56; B01D53/78
Foreign References:
| CN101279197A | 2008-10-08 | |||
| CN107281915A | 2017-10-24 | |||
| CN105056749A | 2015-11-18 | |||
| CN105879605A | 2016-08-24 | |||
| CN106215652A | 2016-12-14 | |||
| GB1038382A | 1966-08-10 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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