Electric furnace having liquid-cooled vessel walls

Details Electric furnace having liquid-cooled vessel walls Electric furnace having liquid-cooled vessel walls

1983-01-24

1984-03-06

Envall, Jr., Roy N.

Industrial electric heating furnaces

Arc furnace device

Furnace body detail

F27D 112

Patent

active

044358148

ABSTRACT:
An electric furnace including a furnace vessel having modular thermally stressed wall parts, wherein in order to lengthen the service life of the thermally stressed wall parts of furnaces, cooling pipe layers are provided with the cooling pipes of the inner layer located in a fireproof construction material (35). These cooling pipes form the reinforcement for the fireproof construction material.
The inner layer of cooling pipes face the inside of the vessel and are made in one piece, U-shaped at the upper and the lower and lead into the outer layer of cooling pipes. The outer layer of cooling pipes empty into a liquid distributing conduit provided with at least one integrated bypass openings whereby cooling liquid is at least partially short-circuited between pipes in the outer layer.
The cooling pipe is thermally stressed and relieved in a homogeneous manner by the one-piece construction of the cooling pipes facing the inside of the vessel, by U-shaped transitions to the outer cooling pipe and by the avoidance of welding seams and other material connections in the cooling pipe, so that thermal stresses in the cooling system are almost excluded and the cooling system is largely freed from the effects of alternating temperature stresses.

REFERENCES:
patent: 3829595 (1974-08-01), Nanjyo et al.
patent: 4206312 (1980-06-01), Kuhlmann
patent: 4335870 (1982-06-01), Diener

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