Burner air/fuel ratio regulation method and apparatus

F - Mech Eng,Light,Heat,Weapons – 23 – N

Patent

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F23N 1/02 (2006.01) F23N 5/18 (2006.01) F23N 5/02 (2006.01)

Patent

CA 2389825

Control system and method for regulating the air/fuel mix of a burner for a web dryer or a regenerative or recuperative oxidizer, for example. Differential air pressure is monitored between the air chamber (21) of the burner (10) and the enclosure (15) into which the burner (10) fires (such as a flotation dryer or the combustion chamber of a regenerative thermal oxidizer). Fuel flow is monitored by a differential pressure measurement between the fuel chamber (22) of the burner (10) and the enclosure (15) into which the burner (10) fires. These measurements are compared to predetermined values, and the fuel flow and/or air flow to the burner (10) is regulated accordingly.

L'invention se rapporte à un système et à un procédé de commande permettant la régulation du mélange air/combustible d'un brûleur de séchoir pour feuilles ou d'un dispositif d'oxydation à régénération ou à récupération, par exemple. La différence de pression de l'air est contrôlée entre la chambre à air (21) du brûleur (10) et l'enceinte (15) dans laquelle le bruleur (10) a son foyer (telle qu'un séchoir à flottation ou la chambre de combustion d'un dispositif d'oxydation thermique à régénération). Le flux de combustible est régulé par la mesure de la différence de pression entre la chambre de combustible (22) du brûleur (10) et l'enceinte (15) dans laquelle le brûleur (10) a son foyer. Ces mesures sont comparées à des valeurs préétablies et le flux de combustible et/ou le flux d'air à destination du brûleur (10) est régulé en conséquence.

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