Process and device for the preparation of sulfuric acid
AssigneesThyssenkrupp Industrial Solutions AG, thyssenkrupp AG
InventorsHolger Thielert, Zion Guetta
Life of this patent
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Abstract
A process for preparing sulfuric acid may involve oxidizing sulfur to sulfur dioxide by way of dried air in a first oxidation stage. The sulfur dioxide may then be oxidized to sulfur trioxide in a second oxidation stage. The sulfur trioxide may be absorbed by sulfuric acid in at least one absorption stage. Further, heated sulfuric acid may be drawn off from the absorption stage and used for generating steam. Process gas from an intermediate absorption stage may be recycled to the second oxidation stage and, in some cases, a final absorption stage after the process gas flows through the second oxidation stage.
Claims17
A process for preparing sulfuric acid, the process comprising:
- oxidizing sulfur to sulfur dioxide by way of air in a first oxidation stage;
- oxidizing the sulfur dioxide to sulfur trioxide in a second oxidation stage;
- absorbing the sulfur trioxide in an absorption stage to form sulfuric acid;
- drawing heated sulfuric acid off from the absorption stage and generating steam by using the heated sulfuric acid;
- and
- introducing the steam at least partly into the absorption stage.
An apparatus for preparing sulfuric acid, the apparatus comprising:
- a first oxidation facility for generating sulfur dioxide;
- a second oxidation facility for oxidizing the sulfur dioxide to sulfur trioxide;
- an absorption facility attached to the second oxidation facility, the absorption facility for absorbing the sulfur trioxide by way of sulfuric acid;
- a steam generation facility joined to the absorption facility, wherein sulfuric acid that is drawn off from the absorption facility is configured to be supplied to the steam generation facility for generating steam;
- and
- a feed line for introducing the steam from the steam generation facility into the absorption facility.
Dependencies are inferred from the claim text.