General Electric Company

Energy and Environmental Research

Donald Keith Morrison

Roy Payne

Robert A Ashworth

Thomas Alfred Laursen

Robert William Waltz

Chris E Latham

William Theodore Lipinski

Milton George Manos

Paul Gregory Stonkus

Robert Frato

George Stiffler

Donald Keith Hartsock

Thomas Kunzler

A method for operating a combustion system to facilitate reducing emissions from the system is provided. The method includes supplying an aqueous selective reducing agent from an aqueous selective reducing agent source to an atomizer that is directly coupled in flow communication with the aqueous selective reducing agent source. The method also includes atomizing the selective reducing agent in the atomizer, and injecting atomized droplets of the selective reducing agent from the atomizer directly into a transport stream of flue gas flowing within a temperature zone defined within the combustion system.

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The boiler nose or arch of a furnace projects into the upwardly flowing flue gas to form a restricted passage. Overfire air is introduced into the cavity or plenum of the boiler nose and flows to injection ports along the inclined surface of the boiler nose to provide overfire air for penetration into and mixing with the flue gases in the restricted flue gas passage.

Injection of overfire air through the upper furnace arch for penetration and mixing with flue gas

Apparatus for controlling primary air flow and pulverized coal flow to a plurality of burners in a coal-fired boiler includes a plurality of coal dampers arranged to supply a mixture of air and pulverized coal to respective burners in the coal-fired boiler, each damper having a damper body and at least two orifice plates pivotally secured therein, the orifice plates movable between open and closed positions; a real time coal flow monitoring device operatively associated with each damper that is adapted to generate analog signals representing real time coal flow through its respective damper; and a programmable logic controller adapted to receive the analog signals and to adjust the orifice plates to balance the flow of air and pulverized coal to each of the plurality of burners.

Automatic coal damper

A method and system is provided for the reduction of nitrogen and sulfur oxides emissions from carbonaceous fuel combustion flue gases. The method includes the injection of coal water slurry as a reburn fuel into furnace flue gases to partially oxidize the coal water slurry thereby producing reducing gas species in a reburn zone that convert flue gas nitrogen oxides to diatomic nitrogen. Optionally, sulfur oxides may also be removed from the flue gas by adding alkali compounds to the coal water slurry before injecting the slurry into the furnace, or by injecting the alkali compounds separately into the reducing reburn zone in the furnace created by the partial oxidation of the coal water slurry reburn fuel. The alkali compounds react with the sulfur species to produce alkali sulfite and sulfate particulate solids, which can be removed in a downstream particulate removal device such as an electrostatic precipitator or bag house.

Method and system for reducing nitrogen oxide and sulfur oxide emissions

Growing community of inventors

Clinton, OH, United States of America

Donald Keith Morrison