High temperature convection furnace
AssigneeColumbia Gas Service System Corporation
InventorKlaus H. Hemsath
Life of this patent
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Abstract
A fuel fired heat treating furnace having an imperforate inner shell for containing a work load in isolation. The shell is made of a refractory material which provides a good heat exchange from the outside to the inside. A multiplicity of hot gas streams is directed under pressure against the outside of the shell by means of a circulation system which includes a plenum, a fan within the plenum and a plurality of apertured distributor tubes extending from one end of the shell to the other. Fuel burners exhaust combustion gases into the system on the discharge side of the fan where the gases mix with returning gases from the intake side of the fan and are fed into the distributor tubes.
Claims5
An industrial heat treating furnace comprising:
- an outer housing having a refractory lining, an imperforate heat exchange shell within said housing, said shell being spaced inwardly from the inner surface of said housing lining, a means for directing a multiplicity of hot combustion gas streams towards said shell, said means having a plurality of hot combusion gas distributor tubes arranged symmetrically, side by side around said shell in a spaced relationship with respect to each other and to said lining and to said shell, said tubes having a plurality of jet stream apertures, and means for supplying hot combustion gases under pressure to said tubes.
Dependencies are inferred from the claim text.