| 摘要 |
<p>The method for the preparation of sulfuric acid in a sulfuric acid extraction plant (1), comprises preparing a sulfur dioxide (SO 2) containing raw gas (2), supplying the raw gas through a reaction container (9) for catalytic reaction of sulfur dioxide to sulfur trioxide (SO 3), converting the formed SO 3 to sulfuric acid, and reducing the SO 2-emission of the gas flow (16) by the hydrogenation of a partial flow of the SO 2-containing raw gas with a hydrogen rich gas (18) and by the supply of the obtained hydrogen sulfide (H 2S) containing gas flow with a H 2S-gas scrubber. The method for the preparation of sulfuric acid in a sulfuric acid extraction plant (1), comprises preparing a sulfur dioxide (SO 2) containing raw gas (2), supplying the raw gas through a reaction container (9) for catalytic reaction of sulfur dioxide to sulfur trioxide (SO 3), converting the formed SO 3 to sulfuric acid, and reducing the SO 2-emission of the gas flow (16) leaving the extracting plant by the hydrogenation of a partial flow of the SO 2-containing raw gas with a hydrogen rich gas (18) and by the supply of the obtained hydrogen sulfide (H 2S) containing gas flow into a H 2S-gas scrubber of a coke-oven gas plant or petrochemical plant. Coke-oven gas is used for the hydrogenation of the SO 2-emission. The gas flow is preheated before allowing into a hydrogenation reactor (20) by heat exchange with the gas flow releasing from the hydrogenation reactor. The SO 2-containing raw gas is produced by burning or catalytic conversion of hydrogen sulfide (H 2) containing gases, which result with the cleaning of coke-oven gases. The gas flow (16) with a SO 2-emission is split into two partial flows, where a first partial flow is led back in the SO 2-containing raw gas and the second partial flow is hydrogenated in the subsequent treatment stage with the hydrogen rich gas. The SO 2-containing raw gas is produced by a two-stage burning of the H 2S-containing gases and the first partial flow is supplied to the raw gas before the second burning stage. The formed SO 3 is absorbed in an absorber in concentrated sulfuric acid. An INDEPENDENT CLAIM is included for a plant for the preparation of sulfuric acid.</p> |
