Automatic bed level control for furnaces

Details Automatic bed level control for furnaces Automatic bed level control for furnaces

D - Textiles, Paper

21

C

341/31, 9/37

D21C 11/10 (2006.01) F23G 5/50 (2006.01) F23G 7/04 (2006.01) F23K 3/22 (2006.01) F23N 5/08 (2006.01) G05D 9/12 (2006.01)

Patent

CA 1057910

Abstract An automatic bed level control system is provided for furnaces which burn a material on a bed, such as chemical recovery furnaces and the like. Optical sensing means sense light emitted by the burning of the bed material and provide a signal which varies as a function of the intensity of the sensed light. The sensing means are structured and oriented to respond to light emanating only from a particular, vertically limited zone in the furnace, such that variations in the intensity of the sensed light are indicative of variations in bed level. The signal provided by the sensing means is then used to regulate some bed level controlling parameter, as for instance primary air flow.

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