发明名称 |
METHOD OF SULFUR DIOXIDE REMOVAL FROM GASEOUS STREAMS WITH ALPHA-HEMIHYDRATE GYPSUM PRODUCT FORMATION |
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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申请公布号 |
CA2097996(C) |
申请公布日期 |
1998.11.10 |
申请号 |
CA19932097996 |
申请日期 |
1993.06.08 |
申请人 |
DRAVO LIME COMPANY |
发明人 |
COLLEGE, JOHN W. |
分类号 |
B01D53/34;B01D53/50;B01D53/77;C01F11/46;(IPC1-7):B01D53/14 |
主分类号 |
B01D53/34 |
代理机构 |
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