| 摘要 |
<p>When producing sulfuric acid from a gas containing sulfur dioxide, the sulfur dioxide is catalytically oxidized in a converter to obtain sulfur trioxide, the sulfur trioxide produced thereby is absorbed in concentrated sulfuric acid in an intermediate absorber, and the residual gas possibly is again supplied to a catalytic conversion stage. The sulfur trioxide produced then can be absorbed in concentrated sulfuric acid in a final absorber. To simplify the plant configuration and control also for feed gases with high SO2 contents, it is provided in accordance with the invention that the inlet concentration of the acid to the intermediate absorber is about 97.3 to 98.4 % H2SO4.</p> |
