US 12,264,066 B2
Process and apparatus for acid regeneration
Andrew Richardson, Clinton, NJ (US); Frank Fitch, Bedminster, NJ (US); and Blake Stapper, Austin, TX (US)
Assigned to Messer Industries USA, Inc., New Castle, DE (US)
Filed by Messer Industries USA, Inc., Bridgewater, NJ (US)
Filed on Apr. 25, 2022, as Appl. No. 17/727,870.
Prior Publication US 2023/0339752 A1, Oct. 26, 2023
Int. Cl. C01B 17/58 (2006.01); F23G 5/08 (2006.01); F23G 7/00 (2006.01); F23L 7/00 (2006.01); F23L 15/00 (2006.01); F23N 5/00 (2006.01)
CPC C01B 17/58 (2013.01) [F23G 5/08 (2013.01); F23G 7/008 (2013.01); F23L 7/007 (2013.01); F23L 15/00 (2013.01); F23N 5/006 (2013.01); F23G 2204/10 (2013.01); F23L 2900/07005 (2013.01); F23L 2900/07006 (2013.01)] 12 Claims
OG exemplary drawing
 
1. 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.