Importance

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Abstract

A method of combustion for pulverized hydrocarbonaceous fuel includes injecting a concentrated fuel and air stream into a burner, causing a low-pressure zone; directing a flow of a high-temperature combustion gas from a combustion chamber into the low-pressure zone in the burner; mixing the high-temperature combustion gas with the injected concentrated stream to heat the injected concentrated stream; injecting the heated concentrated stream from the burner to the combustion chamber, wherein the concentrated stream is rapidly devolatilized and combusted in a flame that has a fuel-rich flame zone; sensing a combustion parameter; and, based on the sensed combustion parameter, controlling combustion to achieve at least one of a desired NOx reduction and a desired distance from the burner to a flame front.

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First Claim