| 摘要 |
<p>1. A process of producing sulfuric acid and oleum, wherein SO2 is catalytically reacted to SO3 , the SO3 -containing gases are cooled, part of the SO3 content is absorbed in an oleum producer, and the remaining SO3 content is subsequently absorbed at elevated temperatures in concentrated sulfuric acid in an absorber, characterized in that a partial stream of the SO3 -containing gases is fed to the oleum producer and before entering the oleum producer is cooled by an indirect heat exchange with the partial stream leaving the oleum producer, the reheated partial stream is mixed with the remaining SO3 -containing gas and is fed to the absorber, and the surplus heat of the acid circulated through the absorber is utilized.</p> |
