Patent ID: 6490985
Filing Date: 2002-12-10
Classification: F22B,F23C,F28F,Y02E

Abstract:
A boiler comprising:a combustion chamber formed by front and rear walls and a side wall extending between said front and rear walls and plural stages of burners placed on at least one of said front and rear walls, at least one gas jet port in said at least one of said front and rear walls for making a pressure of a gas near said side wall within said combustion chamber higher than a pressure of a gas at a center portion of said combustion chamber, said at least one gas jet port being at a height within a range of a height of said burner stages; opposing ones of said at least one gas jet port being provided in an opposing manner at the same height in the front and rear walls within the height range of the burners stages; means for supplying a part of the air for burning in a branched manner to the gas jet port and for injecting said part of the air into the combustion chamber; and wherein the air is injected from the at least one gas jet port in a form of a direct flow.