Alstom Technology Limited

Mauricio Ernesto Garay

Bruno Schuermans

Stefano Bernero

Martin Zajadatz

Gianfranco Ludovico Guidati

Stanka Kokanovic

Stephan Torchalla

A burner system with staged fuel injection includes at least one burner with a mixing zone. A combustion chamber is disposed downstream of the mixing zone and a first fuel introduction device is provided upstream of the mixing zone. Furthermore, a second fuel introduction device for the direct injection of fuel into the combustion chamber, is disposed downstream of the mixing zone. In addition, at least one sensor for determining combustion parameters is connected to a control device. The control device is designed to control the second fuel introduction device as a function of the parameters determined by the sensors.

Burner system with staged fuel injection

A method for operating a firing plant with at least one combustion chamber and at least one burner, especially a gas turbine, includes an operating characteristic for operating the combustion chamber close to the lean extinction limit defined as a burner group staging ratio (BGV). Pressure pulsations (Puls) measured in the combustion chamber are processed by a filter device () and converted into corresponding signals (Puls(t)). An exceeding/falling short of at least one pulsation limiting value (Puls) is monitored by a monitoring device () and adapts a pulsation reference value (Puls) in dependence upon the monitoring. The processed pressure pulsations (Puls(t)) are then compared with the adapted pulsation reference value (Puls), and, from this, a correction value &#x394;BGV is determined, by which the burner group staging ratio (BGV) is corrected, and as a result operation of the firing plant close to the lean extinction limit is realized.

Method for operating a firing plant

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Las Heras Mendoza, Argentina

Mauricio Ernesto Garay