发明名称 |
Process for removing contaminants from hot waste gas streams |
摘要 |
A process for removing sulfur dioxide and other contaminants from a hot waste gas stream in which the waste gas stream is cooled to a temperature below 100 DEG F and then passed in sequence through two separate absorption zones utilizing as the absorbent a recirculated aqueous solution of ammonium sulfite-bisulfite salts. Heat is continuously withdrawn from the recirculated salt solution in each zone. The absorbent solution in the first zone has an initial pH of from 6 to 7.2 and a salt concentration of from 1 to 20% by weight. The absorbent solution in the second zone has an initial pH of from 5.2 to 6.5 and a salt concentration, lower than said first zone of, from 0.1 to 5% by weight. The process provides for the efficient absorption and substantial removal of SO2, SO3 and particulate contaminants and for the economic recovery and use of heat from stack gases of a variety of industrial and commercial operations.
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申请公布号 |
US3957951(A) |
申请公布日期 |
1976.05.18 |
申请号 |
US19740499837 |
申请日期 |
1974.08.23 |
申请人 |
INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION |
发明人 |
HOKANSON, ALLAN E.;KATZEN, RAPHAEL;BUTTON, EDWARD F. |
分类号 |
B01D53/22;B01D53/50;B01D53/77;C01B17/60;C01C1/22;(IPC1-7):C01B17/00 |
主分类号 |
B01D53/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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