Patent ID: 6926516
Filing Date: 2005-08-09
Classification: F23D,F23L,Y02E

Abstract:
1. A combustion method comprising steps of: forming combustion air so as to have a jet flow cross section in an air throat, having a larger specific surface area than that in a case of supplying from a circular throat the same quantity of combustion air as said combustion air has; injecting said combustion air into a furnace; injecting fuel toward a jet flow of said air for causing a jet flow of said fuel to be rapidly mixed with said air jet flow with strong turbulence before losing velocity energy of said fuel jet flow; wherein said combustion air is supplied after being preheated to have a high temperature close to a temperature of combustion exhaust gas by collecting heat of said combustion exhaust gas exhausted from a regenerative medium; and wherein said combustion air whose quantity is less than a theoretical air quantity is supplied and high-temperature air combustion for forming a non-oxidizing atmosphere or a reduction atmosphere is carried out; and said fuel is injected with a ratio de/Dpcd of a corresponding diameter de of an opening (