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US 2019/0177161 A1Published application
A process for the production of sulfur trioxide
AssigneeHaldor TopsøE 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.
Claims13
A method for the production of sulfur trioxide from a feed stream comprising sulfur-containing compounds and dissolved metals, such as alkali 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.
2 more elements
Dependencies are inferred from the claim text.