Casing and heater configuration in a material processing apparat

Details Casing and heater configuration in a material processing apparat Casing and heater configuration in a material processing apparat

1992-12-09

1995-05-30

Jeffery, John A.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

219541, 219405, 110250, 373130, 373109, F27D 102

Patent

active

054203945

ABSTRACT:
A material processing apparatus includes a casing including an outer wall having a substantially figure eight configuration, a plurality of upper inner walls disposed inside of the outer wall and being spaced apart and having substantially concentric cylindrical configurations, and a lower inner wall disposed inside of the outer wall and disposed below the upper inner walls. The upper inner walls define an upper airtight vessel, while the lower inner wall defines a lower airtight vessel containing a material processing chamber. The outer wall and upper and lower inner walls also define a channel therebetween surrounding the upper and lower vessels for containing a flow of coolant fluid. Also, a heat exchanger is defined by the upper airtight vessel and the portion of the channel defined by the outer wall and upper inner concentrical walls. The heat exchanger is disposed above and connected in flow communication with the material processing chamber in the lower vessel. The apparatus also includes a heater unit for heating a material in the material processing chamber. The heater unit includes a plurality of elongated electric heating elements extending in generally parallel relation to one another and being operable for emitting heat radiation and a mounting structure which mounts the electric heating elements through spaced side portions of the outer wall and lower inner wall of the casing so as to extend across the material processing chamber in an orientation positioned intermediately between vertical and horizontal orientations.

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