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US 5,507,238 AGranted
Reduction of air toxics in coal combustion gas system and method
OwnerBruce M. Knowlesinventor
Life of this patent
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Abstract
The present invention provides a system and method (1) for reducing the amount of air toxic elements, particularly mercury (16), in concentrations down to and including trace levels, from a flyash (2) laden combustion gas stream (4). The method includes a step of combusting a fuel (14), often coal or solid waste to form flyash, and a step to concentrate the interaction of the flyash (2) in the combustion gas stream (4) for use as a sorbent.
Claims10
A system for reducing amounts of toxic elements in a gas stream, comprising:
- (a) a combustion chamber, the combustion chamber serving as a site for combusting fuel and air and thereby producing the gas stream;
- (b) an exhaust conduit, the exhaust conduit being affixed to the combustion chamber, the exhaust conduit defining a path along which the gas stream exits the combustion chamber;
- (c) a particulate entraining device, the particulate entraining device being affixed to the exhaust conduit such that all of the gas stream exiting the combustion chamber enters the particulate entraining device, the particulate entraining device capturing a portion of particulate material contained within the gas stream;
- and
- (d) a feedback conduit, the feedback conduit being affixed to the particulate entraining device, the feedback conduit being interconnected to the exhaust conduit such that a portion of the particulate material is reintroduced into the exhaust conduit, the particulate material tending to bond with at least some of the toxic elements within the gas stream.
2 more elements
Dependencies are inferred from the claim text.