Patent ID: 6951458
Filing Date: 2005-10-04
Classification: F23C,F23L,Y02E

Abstract:
1. A method for controlling combustion of a reaction furnace comprising: a furnace body having a furnace wall which surrounds a combustion chamber therein, a plurality of reaction pipes provided between a pair of opposing wall portions of said furnace wall of said furnace body and juxtaposedly arranged therebetween so as to extend in the same direction, a plurality of first burners arranged outside said reaction pipes and provided at said furnace wall of said furnace body for burning a fuel in said combustion chamber, one or more second burners fixedly provided in at least one of paired fixing areas of said paired wall portions in which said reaction pipes are provided, so as to inject the fuel in an axial direction of said reaction pipes toward a space defined among two or more adjacent pipes of said reaction pipes, and a heat exchange type combustion air supply apparatus for discharging exhaust gas from said combustion chamber to the outside of said reaction furnace through an air-permeable regenerating means and supplying to said combustion chamber combustion air elevated to a high temperature with sensible heat stored in said regenerating means; wherein the method comprises steps of: operating only said first burners to burn the fuel to elevate a temperature in said combustion chamber until the inside of said combustion chamber gets into a high temperature air combustion state, operating said one or more second burners to burn the fuel after the high temperature air combustion state is attained in said combustion chamber, and reducing a combustion amount of said first burners with an increase in combustion of said one or more second burners to thereby attain a necessary combustion state.