Device and method for supplying combustion air and for recirculating exhaust gas for a burner

A method for supplying combustion air and for recirculating exhaust gas for a burner having a combustion chamber, wherein

• combustion air is supplied by means of a plurality of driving nozzles, which are distributed about a central axis, to a mixing chamber arranged downstream of the driving nozzles with exhaust gases being sucked up from the combustion chamber, and,
• in the mixing chamber, the combustion air emerging from the driving nozzles is mixed with exhaust gases, which flow out of the combustion chamber and are sucked back by means of the driving nozzles, to form a combustion air/exhaust gas mixture, and
• the combustion air/exhaust gas mixture is supplied to a reaction zone downstream of the mixing chamber,
• wherein combustion air is selectively supplied via a bypass duct to the reaction zone, bypassing the driving nozzles, and
• wherein an oxygen content of a mixture of the combustion air supplied selectively via the bypass duct and the combustion air/exhaust gas mixture is monitored and a quantity of the combustion air supplied via the bypass duct is adjusted to maintain a defined oxygen content.

A method for supplying combustion air and for recirculating exhaust gas for a burner having a combustion chamber,

• wherein combustion air is supplied by means of a plurality of driving nozzles, which are distributed about a central axis, to a mixing chamber arranged downstream of the driving nozzles with exhaust gases being sucked up from the combustion chamber, and,
• in the mixing chamber, the combustion air emerging from the driving nozzles is mixed with exhaust gases, which flow out of the combustion chamber and are sucked back by means of the driving nozzles, to form a combustion air/exhaust gas mixture, and
• the combustion air/exhaust gas mixture is supplied to a reaction zone downstream of the mixing chamber,
• wherein combustion air is selectively supplied via a bypass duct to the reaction zone, bypassing the driving nozzles, and
• wherein a temperature of the recirculated exhaust gas is detected and a quantity of the combustion air supplied via the bypass duct is adjusted depending on the detected temperature.