Infrared heating of fluidized bed furnace

Details Infrared heating of fluidized bed furnace Infrared heating of fluidized bed furnace

1986-09-08

1988-06-21

Brody, Christopher W.

Metallurgical apparatus

With control means responsive to sensed condition

With temperature sensor

266252, 266103, C21D 9567

Patent

active

047520612

ABSTRACT:
A fluidized bed for treating of product at high temperatures (1100.degree. C. to 1300.degree. C.) is possible, while overcoming problems such as slow start up times and contamination due to combustion gas. The fluidized bed uses an inert gas introduced to the bed to cause fluidization of refractory particles. Exposed surfaces or boundary layers of the bed are heated by infrared radiation produced exterior to the bed and absorbed by exposed particles of the bed. The thermal characteristics of the bed insure rapid dissipation of the absorbed energy. Electrically powered lamps produce the radiation and preferably are high intensity shortwave infrared radiation lamps. The lamps remain out of direct contact with the bed preferrably separated by a quartz wall or screen.

REFERENCES:
patent: 3404874 (1968-10-01), Wynne
patent: 4249889 (1981-02-01), Kemp
patent: 4604055 (1986-08-01), Mackenzie
Procedyne Corp., "Gas vs Electric Heating in Fluidized Bed Furnaces" .COPYRGT.1982.
Staffin H, "Continuous Wire Oil Tempering in a Fluidized Bed Furnace, Cont. Proc. Wire Assoc. Int. 5/81 pp. 21-37.

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