Method for operating a combustion chamber equipped with premixing burners divided into two groups
AssigneeABB Research Ltd.
InventorThomas Sattelmayer
Life of this patent
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Abstract
In a method for operating a combustion chamber (4) equipped with premixing burners, under full load all the burners being operated under identical stoichiometric conditions, the burners are subdivided into at least two burner groups (1, 2 and, in the case of operating conditions below full load, the respective burner groups (1, 2) are operated with different air coefficients (.lambda.1, .lambda.2), that is to say at different flame temperatures (Tgr1, Tgr2). The operating range of the combustion chamber is widened considerably thereby.
Claims7
A method for operating a combustion chamber equipped with a plurality of premixing burners mounted on a front wall of the combustion chamber in a planar arrangement with the burners having a common, axial flow direction for axially ungraded combustion, and the burners being subdivided into at least two burner groups, the method comprising the steps of:
- dividing a total quantity of fuel into separate fuel flows for the at least two burner groups, a ratio of the fuel flows being constant;
- operating the burner groups under fill load under identical stoichiometric conditions;
- and,
- operating the burner groups under part load with mutually different air coefficients to produce different flame temperatures.
Dependencies are inferred from the claim text.