F - Mech Eng,Light,Heat,Weapons – 26 – B
Patent
F - Mech Eng,Light,Heat,Weapons
26
B
34/52
F26B 21/02 (2006.01)
Patent
CA 1074106
GRATE PREHEATER KILN SYSTEM ABSTRACT OF THE DISCLOSURE Grate burner fuel supplies additional heat to the grate preheater for accomplishing more calcining. A cooler recoup system directs cooler recoup air to the grate fuel burner as preheat combustion air for the fuel burner. The cooler recoup air is also directed to the grate preheat zone as preheated combustion air for fuel in the pellet bed. Cooler recoup air is also directed to the drying zone. The cooler recoup system is controlled so that excess cooler recoup air is bypassed to the waste gas system to dump excess air. Also, a cooler recoup fan speed or damper is regulated to control kiln firing hood pressure by varying the flow. In addition, there is provided the cooler recoup excess air bypass damper for controlling duct pressure to stabilize air flow in the system by varying the flow to the waste gas system. The dis- closed apparatus operated according to the method herein dis- closed provides improved fuel economy, more effective control and reduction in waste gas, thus reducing heat consumption to provide improved fuel economy with better control of the pre- heating and drying operation.
328314
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