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US 10,640,376 B2Granted
Process for the production of sulfur trioxide
AssigneeHaldor Topsoe A/S
InventorsMorten Thellefsen, Martin Møllerhøj
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Abstract
Sulfur trioxide is produced from a feed stream comprising sulfur-containing compounds and dissolved metals, such as alkali metals, in a plant comprising an incineration furnace, a waste heat boiler, a dilution air heater, a dust removal absorber and an SO2 converter. The plant may further comprise a sulfuric acid condenser for the production of sulfuric acid.
Claims12
A method for the production of sulfur trioxide from a feed stream comprising sulfur-containing compounds and dissolved metals, said process comprising the following steps:
- incineration in the presence of an O2-rich stream, whereby the sulfur-containing compounds in the feed stream are converted to SO2,
- cooling of the gas by means of radiation to recover heat as high pressure steam, wherein at least 50% of the duty in the waste heat boiler is transferred by gas and particle radiation,
- further cooling of the process gas, that leaves the waste heat boiler, in a dilution air heater,
- adding dilution air to the process gas to provide sufficient oxygen for the oxidation of SO2 to SO3 in an SO2 converter, and feeding the diluted process gas to an SO2 converter comprising a number of catalyst layers.
1 more element
Dependencies are inferred from the claim text.