Furnaces – With control means responsive to a sensed condition – Feed control
Patent
1987-03-16
1988-07-26
Favors, Edward G.
Furnaces
With control means responsive to a sensed condition
Feed control
110210, 110236, 110346, F23N 502
Patent
active
047592982
ABSTRACT:
A batch-type pyrolysis furnace fired by a main heat source such as a gas burner or an electric heating coil in combination with an afterburner to burn volatiles generated in the furnace's main chamber, is operated to incinerate high-polymer loads smokelessly, yet is effectively safeguarded from explosions. A single thermocouple (zone TC) senses the instantaneous temperature in a critical sensitive zone (CSZ) of the furnace and in cooperation with a programmable controller (PC), maintains a preselected ramp and soak temperature profile over the entire burn cycle. The CSZ has been found to be within about 1' (foot) from the upper edge of the throat, and not lower than about 6" (inches) from the ceiling of the main chamber. When the temperature required by the profile is exceeded, a single water spray actuated by a signal from the PC lowers the temperature below the profile. The zone TC thus maintains a fire under controlled temperature conditions in the main chamber without an explosion, using a single TC in the control system.
REFERENCES:
patent: 3807321 (1974-04-01), Stockman
patent: 4181081 (1980-01-01), Weber
patent: 4557203 (1985-12-01), Mainord
Heran Robert F.
Koptis Robert A.
Favors Edward G.
Lobo Alfred D.
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