Heating furnace provided with high velocity gas burners

Claim 2

A heating furnace comprising a furnace chamber, a plurality of high velocity gas burners mounted in the walls of said furnace chamber, each high velocity gas burner comprising a combustion chamber, a tapered outlet nozzle formed at one end of said combustion chamber and having a cross-sectional area smaller than that of the combustion chamber, said chamber having an air inlet, an air Flow equalizing plate having a number of air passage holes therein and disposed within said combustion chamber adjacent said air inlet and a fuel inlet means extending into said chamber adjacent said air inlet and said air flow equalizing plate and curved portions formed on the inner surface of the furnace walls at locations opposite to the outlet nozzles of the respective gas burners for diverting the flow of the hot gas streams jetting from said gas burners.

Claim 3

A heating furnace as claimed in claim 1, wherein the gas burners are directed to jet hot gas streams along the furnace walls and said curved portions are formed on the inner surfaces of the furnace walls forwardly of the respective high velocity gas burners in the combustion gas jetting direction.

Claim 4

A heating furnace as claimed in claim 1, wherein said gas burners and said curved portions are grouped along the length of said furnace for forming a plurality of successive heating zones in the heating furnace by curtains of hot gases which are formed by the jetting hot gas streams deflected by said curved portions.

Claim 5

A heating furnace as claimed in claim 1, wherein the bottom of the furnace is comprised of the bed of a car having grooves thereacross, and the high velocity gas burners are positioned to direct the hot gas streams jetting from said gas burners through the grooves in the bed of the car.

Claim 6

A heating furnace as claimed in claim 1, further comprising low velocity gas burners mounted in the lower portion of the furnace, the high velocity gas burners being mounted in the upper portion of the furnace, the combustion gases discharged from the low velocity gas burners ascending in the furnace and being stirred by the hot gas streams jetting from said high velocity gas burners.

Claim 7

A heating furnace comprising a furnace chamber, a plurality of high velocity gas burners mounted in the walls of said furnace chamber, each high velocity gas burner comprising a combustion chamber, a tapered outlet nozzle formed at one end of said combustion chamber and having a cross-sectional area smaller than that of the combustion chamber, said chamber having an air inlet, an air flow equalizing plate having a number of air passage holes therein and disposed within said combustion chamber adjacent said air inlet and a fuel inlet means extending into said chamber adjacent said air inlet and said air flow equalizing plate, said furnace having a bottom comprised of the bed of a car having grooves thereacross, and the high velocity gas burners are positioned to direct the hot gas streams jetting from said gas burners through the grooves in the bed of the car.

Claim 8

A heating furnace comprising a furnace chamber, a plurality of high velocity gas burners mounted in the walls of said furnace chamber, each high velocity gas burner comprising a combustion chamber, a tapered outlet nozzle formed at one end of said combustion chamber and having a cross-sectional area smaller than that of the combustion chamber, said chamber having an air inlet, an air flow equalizing plate having a number of air passage holes therein and disposed within said combustion chamber adjacent said air inlet and a fuel inlet means extending into said chamber adjacent said air inlet and said air flow equalizing plate, said furnace having a bottom comprised of the bed of a car having grooves thereacross, and the high velocity gas burners are positioned to direct the hot gas streams jetting from said gas burners through the grooves in the bed of the car.

Claim 9

A heating furnace comprising a furnace chamber, a plurality of high velocity gas burners mounted in the walls of said furnace chamber, each high velocity gas burner comprising a combustion chamber, a tapered outlet nozzle formed at one end of said combustion chamber and having a cross-sectional area smaller than that of the combustion chamber, said chamber having an air inlet, an air flow equalizing plate having a number of air passage holes therein and disposed within said combustion chamber adjacent said air inlet and a fuel inlet means extending into said chamber adjacent said air inlet and said air flow equalizing plate, said furnace further comprising a plurality of low velocity gas burners mounted in the lower portion of the furnace, the high velocity gas burners being mounted in the upper portion of the furnace, the combustion gases discharged from the low velocity gas burners ascending in the furnace and being stirred by the hot gas streams jetting from said high velocity gas burners.

Claim 10

A heating furnace comprising a furnace chamber, a plurality of high velocity gas burners mounted in the walls of said furnace chamber, each high velocity gas burner comprising a combustion chamber, a tapered outlet nozzle formed at one end of said combustion chamber and having a cross-sectional area smaller than that of the combustion chamber, said chamber having an air inlet, an air flow equalizing plate having a number of air passage holes therein and disposed within said combustion chamber adjacent said air inlet and a fuel inlet means extending into said chamber adjacent said air inlet and said air flow equalizing plate, said furnace further comprising a plurality of low velocity gas burners mounted in the lower portion of the furnace, the high velocity gas burners being mounted in the upper portion of the furnace, the combustion gases discharged from the low velocity gas burners ascending in the furnace and being stirred by the hot gas streams jetting from said high velocity gas burners.