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公开(公告)号：EP3856392A1
公开(公告)日：2021-08-04
申请号：EP19783579.6
申请日：2019-09-24
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公开(公告)号：EP3732327A1
公开(公告)日：2020-11-04
申请号：EP18830499.2
申请日：2018-12-20
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公开(公告)号：EP3732326A1
公开(公告)日：2020-11-04
申请号：EP18830498.4
申请日：2018-12-20
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公开(公告)号：EP3384974A1
公开(公告)日：2018-10-10
申请号：EP18164931.0
申请日：2018-03-29
CPC分类号： B01D53/501 , B01D53/56 , B01D53/60 , B01D53/64 , B01D2251/104 , B01D2251/60 , B01D2255/207 , B01D2255/20723 , B01D2255/20738 , B01D2255/20746 , B01D2255/20761 , B01D2255/20784 , B01D2257/60 , B01D2258/0283 , Y02A50/2344
摘要： The present invention relates to a method and arrangement for treating a gas flow, which comprises nitrogen oxides. Ozone is brought into contact with the gas flow in an ozone treatment section, and nitrogen oxides and optionally other contaminants present in the gas flow react with ozone and form oxidation products. The gas flow from the ozone treatment section is directed to a first section of a wet scrubber, where the gas flow is brought into contact with a first aqueous reagent. The oxidation products in the gas flow react with the first aqueous reagent and are transferred from the gas flow into a first liquid phase. The gas flow from the first section is fed to a second section of the wet scrubber. A second aqueous reagent, which comprises at least one ozone depleter selected from anionic sulphur compounds and/or transition metal cations, is also fed to the second section of the wet scrubber and contacted with the gas flow, whereby ozone in the gas flow reacts with the at least one ozone depleter to form reaction products, which are transferred to a second liquid phase.
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