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US 12,759,876 B2Granted
System and method for producing sulfur dioxide and associated sulfuric acid plant
AssigneeChemetics Inc.
InventorsRene Dijkstra, Dominika Kidon
Life of this patent
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Abstract
Improved systems and methods are disclosed for producing sulfur dioxide using oxygen and submerged combustion. By incorporating a vapour phase combusting step in addition to the submerged combusting step, the downstream sulfur condenser may be made substantially smaller with reduced complexity and cost. Further, energy recovery is simplified and improved.
Claims7
A system for the production of sulfur dioxide gas comprising:
- a submerged combustion reactor for the combustion of molten sulfur to sulfur dioxide comprising an inlet for a supply of molten sulfur, an inlet for a supply of oxygen at ≥90% purity by volume, an inlet for condenser sulfur, and an outlet;
- a vapour phase combustion chamber for the combustion of sulfur vapour to sulfur dioxide comprising an inlet connected to the outlet of the submerged combustion reactor, an inlet for a supply of oxygen at ≥90% purity by volume, and an outlet;
- an apparatus for cooling a gas and for condensing sulfur vapor into liquid sulfur comprising an inlet connected to the outlet of the vapour phase combustion chamber, an outlet for liquid sulfur connected to the condensed sulfur inlet of the submerged combustion reactor, and an outlet for a gas mixture comprising sulfur dioxide and residual sulfur vapour;
- wherein the apparatus for cooling a gas and for condensing sulfur vapour into liquid sulfur further comprises:
- a heat exchanger for cooling a gas comprising the inlet connected to the outlet of the vapour phase combustion chamber, and an outlet;
- and
- a sulfur condenser for condensing sulfur vapour into liquid sulfur comprising an inlet connected to the outlet of the heat exchanger, the outlet for liquid sulfur connected to the condensed sulfur inlet of the submerged combustion reactor, and the outlet for a gas mixture comprising sulfur dioxide and residual sulfur vapour.
4 more elements
Dependencies are inferred from the claim text.