发明授权
US5312609A Method of sulfur dioxide removal from gaseous streams with
.alpha.-hemihydrate gypsum product formation
失效
从具有α-水合石膏产品形成的气流中除去二氧化硫的方法
- 专利标题： Method of sulfur dioxide removal from gaseous streams with .alpha.-hemihydrate gypsum product formation
- 专利标题（中）： 从具有α-水合石膏产品形成的气流中除去二氧化硫的方法
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申请号： US999621申请日： 1992-12-31
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公开(公告)号： US5312609A公开(公告)日： 1994-05-17
- 发明人: John W. College
- 申请人： John W. College
- 申请人地址： PA Pittsburgh
- 专利权人： Dravo Lime Company
- 当前专利权人： Dravo Lime Company
- 当前专利权人地址： PA Pittsburgh
- 主分类号： B01D53/34
- IPC分类号： B01D53/34 ; B01D53/50 ; B01D53/77 ; C01F11/46 ; C01B17/00
摘要：
A method is provided for removing sulfur dioxide from a hot gaseous stream while directly producing .alpha.-hemihydrate gypsum from a scrubber effluent. A portion of an aqueous scrubbing medium containing calcium and magnesium sulfite is removed from a scrubbing unit and passed to a pressurized oxidation vessel where the sulfites are contacted with an oxidizing gas at an elevated temperature to convert calcium sulfite directly to .alpha.-hemihydrate gypsum and magnesium sulfite to magnesium sulfate. The .alpha.-hemihydrate is separated from the aqueous medium removed from the pressurized oxidation vessel.
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