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US 2019/0160452 A1Published application
Low temperature wet air oxidation
AssigneeSiemens Energy, Inc.
InventorsBryan J. Kumfer, Eric Martin, Simon Larson, Chad L. Felch
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Abstract
There are disclosed systems and processes that substantially prevent scaling in the treatment of a spent carbon material in a wet air oxidation (WAO) system.
Claims17
A treatment process comprising:
- directing a feed stream comprising spent carbon and an amount of a scale forming contaminant therein through a heat exchanger and to a wet air oxidation unit for regeneration of the spent carbon therein;
- adding an oxidant to the feed stream;
- performing a wet air oxidation process on at least a portion of the feed stream in the wet air oxidation unit to produce a treated material (20) comprising a regenerated carbon material and an offgas comprising a residual oxygen concentration of at least 3 vol. %;
- and
- directing the treated material from the wet air oxidation unit through the heat exchanger, wherein heat from the treated material is utilized to heat the feed stream in the heat exchanger;
- wherein the wet air oxidation process is carried out at a temperature of about 200° C. or less with a residence time of at least about 1 hour.
3 more elements
Dependencies are inferred from the claim text.