Patent ID: 7896647
Filing Date: 2011-03-01
Classification: F23C,F23D,F23M,F23N

Abstract:
1. A method for heating a substrate, comprising: (A) providing a burner system comprising a burner body and a burner block, wherein (B) determining a first rate of heat transfer to the substrate, (C) determining the rates at which fuel and oxidant are to be fed to said burner system to be combusted thereat, and the total oxygen concentration of said oxidant to be combusted, to generate heat of combustion to be transferred to said substrate from said burner system at said first rate, (D) feeding fuel, and oxidant having said total oxygen concentration, at said rates to said burner system and combusting said fuel and said oxidant at said system to generate heat of combustion which is transferred to said substrate at said first rate, while apportioning the amounts of oxygen fed through said first and second tubes of said burner system with respect to the amounts of oxygen fed through said secondary passageways and said outlet ports of said burner system to minimize formation of NOx by said combustion, (E) determining a second rate of heat transfer to the substrate which is different from said first rate, (F) determining a new total oxygen concentration of said oxidant to be combusted and determining new rates at which said oxidant, or said oxidant and said fuel, are to be fed to said burner system and combusted thereat to generate heat of combustion to be transferred to said substrate at said second rate, and (G) while continuing to feed fuel and oxidant to said burner system, changing the total oxygen concentration fed to said burner system to said new total oxygen concentration and changing the rate at which said oxidant or said oxidant and said fuel are fed to said burner system, and continuing to combust said fuel and oxidant at said burner system, without discontinuing said combustion, to generate heat of combustion which is transferred to said substrate at said second rate, while apportioning the amounts of oxygen fed through said first and second tubes with respect to the amounts of oxygen fed through said secondary passageways and said outlet ports to minimize formation of NOx by said combustion, wherein the amount of oxygen fed to said burner system is at all times sufficient to maintain combustion of said fuel at said burner system, and wherein the amount of oxygen fed to said burner system is at all times sufficient to maintain the carbon monoxide content of the gaseous products of said combustion at less than 100 ppm.