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US 12,264,066 B2Granted
Process and apparatus for acid regeneration
AssigneeMesser Industries USA, Inc.
InventorsAndrew Richardson, Frank Fitch, Blake Stapper
Life of this patent
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Abstract
A process and apparatus for regenerating a spent acid stream or other stream, such as a spent acid stream or other stream containing sulfur, by decomposing the spent sulfuric acid stream and/or other sulfur-containing streams to recover sulfur dioxide from the stream. Also provided is a process for preparing sulfuric acid from the sulfur dioxide recovered by the apparatus and process.
Claims12
A process for decomposing at least one of a spent sulfuric acid stream or other sulfur-containing stream, comprising:
- supplying at least one of the spent sulfuric acid stream or the other sulfur-containing stream into a furnace;
- supplying oxygen-enriched combustion air into the furnace;
- separately supplying pure oxygen into the furnace;
- supplying a combustion fuel to the furnace;
- decomposing the at least one spent sulfuric acid stream or other sulfur-containing stream in the furnace;
- sensing an amount of oxygen both in the oxygen-enriched combustion air supplied to the furnace and at an outlet stream from the furnace;
- and
- adjusting the amount of oxygen supplied to the oxygen-enriched combustion air as necessary for decomposing the at least one spent sulfuric acid stream or other sulfur-containing stream in the furnace.
5 more elements
Dependencies are inferred from the claim text.