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Alstom Technology Limited

Nsakala Ya Nsakala

Gregory N Liljedahl

Herbert E Andrus, Jr

John L Marion

Glen Jukkola

Mark Palkes

An air infiltration abatement system () for a power plant () includes a recirculated flue gas source (), a recirculated flue gas supply line () connected to the recirculated flue gas source () and a power plant component. The power plant component has a leakage area in fluid communication with the recirculated flue gas supply line (). The recirculated flue gas source () receives a combustion flue gas () from an oxygen fired boiler () of the power plant (), and provides the combustion flue gas () to the recirculated flue gas supply line (). The recirculated flue gas supply line () supplies the combustion flue gas () as a recirculated flue gas () to the oxygen fired boiler () via the leakage area of the power plant component.

Gas leakage reduction system

A combustoris operative to effect therewith the combustion of fossil fuel' in order to thereby both heat to a working fluidand generate a flue gas. An air preheaterreceives the flue gasgenerated in the combustor. A blowercauses airto flow to the air preheaterwhen operating in an air fired mode, and causes both Oand recycled flue gas&#x2032; to flow when operating in the Ofiring mode. The air preheateris operative to transfer heat from the flue gasreceived thereby to the airthat is received when operating in an air fired mode or to both the received Oand the recycled flue gas&#x2032; that is received when operating in the Ofiring mode in order to thereby effect a preheating of the airor of both the Oand recycled flue gas,&#x2032; depending upon the specific nature of the mode of operation thereof, and to thereby effect therewith a cooling of the flue gas received thereby. The preheated airor both the preheated Oand the recycled flue gas&#x2032;, depending upon the specific nature of the mode of operation, is caused to flow from the air preheaterto the combustorin order to thereby effect therewith a fluidization of the fossil fuel

[object Object]

A combustorcombust a fluidized bed of fossil fuel' to heat a working fluidand generate flue gas. An air preheaterhas first and second gas passagewaysfor respectively directing the generated flue gasand another gaswith captured COgenerated by combustion outside of the combustor. When operated in a non-COcapture, the air preheaterreceives the flue gas, but not the other gas, and the first gas passagewaydirects the flue gasso as to preheat the air. However, when operated in the COcapture mode, the air preheaterreceives the flue gasand the other gas, and the second gas passagewayalso directs the other gasso as to preheat the air&#x2032;. In either mode, the preheated air&#x2032; is applied by the combustorto fluidize a bed of fossil fuel

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South Windsor, CT, United States of America

Nsakala Ya Nsakala