Char for contaminant removal in resource recovery unit
AssigneeHamon Research-Cottrell, Inc.
InventorsAaron J. Teller, Jonathan R. Lagarenne
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Abstract
A method and apparatus for controlling or removing mercury, mercury compounds and high molecular weight organics, if present, from a waste incineration apparatus exhaust stream by separately adding a carbonaceous char to the flue gas while the flue gas is still within the unit. The char can be produced in situ by adding a carbonaceous material and allowing the carbonaceous material to thermally decompose.
Claims2
A method for controlling emission from a waste incineration apparatus having a combustion zone, a heat recovery zone, and a pollution control system, wherein said heat recovery zone is comprised of a superheater and a boiler, wherein a temperature range and oxygen content of said heat recovery zone provide a charring zone, said method comprising the steps of:
- supplying waste material to the combustion zone in which the waste material is combusted, combustion of the waste material forming ash and contaminant-containing flue gases,
- providing wood to the contaminant-containing flue gases within the charring zone,
- wherein said wood is incompletely combusted to form a carbonaceous char in situ in said flue gases within said charring zone, wherein said carbonaceous char becomes entrained in the contaminant-containing flue gases so that said carbonaceous char and said flue gases proceed through the waste incineration apparatus together, and
- wherein said carbonaceous char adsorbs contaminants from said flue gases.
Dependencies are inferred from the claim text.