Patent ID: 8516825
Filing Date: 2013-08-27
Classification: F23N

Abstract:
1. Method for reducing the NOx emissions from a burner arrangement comprising a plurality of burners, the burners in parallel, each burner supplied fuel and combustion air to form a flame, the method comprising a sequence of steps, each step including: measuring at a predetermined time an operating parameter of individual burners or burner groups or differences between the operating parameters of individual burners or burner groups wherein the operating parameter comprises a flame temperature of individual burners or burner groups; identifying burners or burner groups having a flame temperature that exceeds a predetermined temperature value; and throttling the fuel supply to those burners or burner groups whose flame temperature exceeds the predetermined value for the flame temperature to reduce the flame temperature by compensating for design-related and manufacturing-related deviations in these burners in order to homogenize the flame temperatures of the burners by adjusting an opening in a fuel feed line by an adjustable throttling screw arranged in the fuel feed line of each burner or burner groups.