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AssigneeALSTOM Technology Ltd
InventorsAdnan Eroglu, Jaan Hellat, Peter Stuber
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The present invention relates to a method of operating a burner, which comprises at least one first fuel supply conduit (5) with a first group of fuel outlet openings (6), essentially arranged in the direction of a burner longitudinal axis (3), for a first premix fuel quantity and one or a plurality of second-fuel supply conduits (7) with a second group of fuel outlet openings (8), essentially arranged in the direction of the burner longitudinal axis (3), for a second premix fuel quantity, it being possible to admit fuel to the second fuel supply conduits (7) independently of the first fuel supply conduit (5). In the method, both fuel supply conduits (5, 7) are operated with the same fuel. By means of the present method of operating a burner, optimum mixing conditions can be set even in the case of different loads, gas qualities or gas preheat temperatures.
Method of operating a burner, said burner having a longitudinal axis, said burner comprising at least one first fuel supply conduit (5) with a first group of fuel outlet openings (6), essentially arranged in the direction of a burner longitudinal axis (3), for the introduction of a first premix fuel quantity into a swirl space and one or a plurality of second fuel supply conduits (7) with a second group of fuel outlet openings (8) essentially arranged in the direction of the burner longitudinal axis (3), it being possible to admit fuel to the second fuel supply conduits (7) independently of the first fuel supply conduit (5), in which the supply of the fuel via the first fuel supply conduits (5) is open-chain controlled or closed-loop controlled separately from the supply of the fuel via the second fuel supply conduits (7), characterized in that the same fuel is supplied to the first and second fuel supply conduits (5, 7).
Burner, consisting essentially of a swirl generator (1) for a combustion airflow (11), a swirl space (2) and means for introducing fuel into the combustion airflow, the swirl generator (1) having combustion air inlet openings (4) for the combustion airflow entering tangentially into the swirl space (2), which means include means for introducing fuel into the combustion airflow of at least one first fuel supply conduit (5) with a first group of fuel outlet openings (6), essentially arranged in the direction of a burner longitudinal axis (3), for a first premix fuel quantity (P1), and the burner has one or a plurality of second fuel supply conduits (7) with a second group of fuel outlet openings (8), essentially arranged in the direction of the burner longitudinal axis (3), for a second fuel quantity (P2), it being possible to admit fuel to these second fuel supply conduits (7) independently of the first fuel supply conduits (5), characterized in that an inner body (9) is arranged in the swirl space (2), the fuel outlet openings (8) of at least one second fuel supply conduit (7) being arranged on the inner body (9) in such a way that they are essentially distributed in the direction of the burner longitudinal axis (3).
Dependencies are inferred from the claim text.