发明授权
- 专利标题： Mercury reduction system and mercury reduction method of flue gas containing mercury
- 专利标题（中）： 含汞汞的汞还原体系和汞还原法
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申请号： US12640725申请日： 2009-12-17
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公开(公告)号： US07906090B2公开(公告)日： 2011-03-15
- 发明人: Nobuyuki Ukai , Moritoshi Murakami , Susumu Okino , Tatsuto Nagayasu , Seiji Kagawa
- 申请人： Nobuyuki Ukai , Moritoshi Murakami , Susumu Okino , Tatsuto Nagayasu , Seiji Kagawa
- 申请人地址： JP Tokyo
- 专利权人： Mitsubishi Heavy Industries, Ltd.
- 当前专利权人： Mitsubishi Heavy Industries, Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Westerman, Hattori, Daniels & Adrian, LLP
- 主分类号： B01D53/50
- IPC分类号： B01D53/50 ; B01D53/56 ; B01D53/64 ; B01D53/74
摘要：
A mercury reduction system according to the present embodiment is a mercury reduction system that reduces NOx and Hg in flue gas discharged from a boiler, and includes an NH4Cl solution spraying unit that sprays an NH4Cl solution into a flue of the boiler in a liquid state, a mixed gas spraying unit that is provided downstream of the NH4Cl solution spraying unit and sprays mixed gas containing NH3 gas and HCl gas into the flue, a reduction denitration apparatus that includes a denitration catalyst reducing NOx in the flue gas with NH3 and oxidizing Hg in the presence of HCl, and a wet desulfurization apparatus that reduces Hg oxidized in the reduction denitration apparatus with a limestone-gypsum slurry.
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