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1. 发明授权

US3957951A Process for removing contaminants from hot waste gas streams 失效
标题翻译：从热废气流中除去污染物的工艺
公开(公告)号：US3957951A
公开(公告)日：1976-05-18
申请号：US499837
申请日：1974-08-23
申请人： Allan E. Hokanson , Raphael Katzen , Edward F. Button
发明人： Allan E. Hokanson , Raphael Katzen , Edward F. Button
IPC分类号： B01D53/22 , B01D53/50 , B01D53/77 , C01B17/60 , C01C1/22 , C01B17/00
CPC分类号： C01C1/22 , B01D53/501
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.degree.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 Heat is continuously withdrawn from the recirculated salt solution in each zone.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 SO.sub.2, SO.sub.3 and particulate contaminants and for the economic recovery and use of heat from stack gases of a variety of industrial and commercial operations.
摘要翻译：一种从热废气流中除去二氧化硫和其他污染物的方法，其中将废气流冷却至低于100°F的温度，然后依次通过两个单独的吸收区，作为吸收剂，再循环的铵水溶液亚硫酸盐 - 亚硫酸氢盐。在每个区域中从再循环的盐溶液中连续排出热量。第一区中的吸收剂溶液的初始pH为6至7.2，盐浓度为1至20重量％。第二区域中的吸收剂溶液的初始pH为5.2至6.5，盐浓度低于所述第一区域的0.1至5重量％。该过程提供了SO2，SO3和颗粒污染物的有效吸收和实质性去除，以及经济回收和使用来自各种工业和商业操作的烟道气体的热量。

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