Drying and gas or vapor contact with solids – Material treated by electromagnetic energy – Infrared energy
Patent
1995-11-01
1997-10-21
Bennett, Henry A.
Drying and gas or vapor contact with solids
Material treated by electromagnetic energy
Infrared energy
34268, 34269, 34209, 34423, F26B 334
Patent
active
056783230
ABSTRACT:
A method and drying apparatus for drying a quantity of sludge. The drying apparatus is comprised essentially of a plurality of drying zones; a plurality of infrared emitters within each of the drying zones; a means for producing a flow of the sludge through the drying zones; a control means; means for determining and transmitting to the control means control input signals indicating the temperature of the infrared emitters within each of the drying zones; means for determining and transmitting to the control means control input signals indicating the temperature of the sludge within each of the drying zones; means for determining and transmitting to the control means control input signals indicating the wet bulb temperature of the air within each of the drying zones; means for determining and transmitting the temperature of the metal components of the dryer; means for determining and transmitting to the control means control input signals indicating an interruption and uninterruption of the sludge flow through the dryer; and processor means having a predetermined set of signal set points incorporated with the control means. The processor means is for receiving the control input signals from the drying apparatus, comparing the input signals to each other and to the predetermined set of signal set points and for transmitting control output signals based upon the control input signals and the predetermined set of signal set points to independently regulate the temperature of the heating elements within each of the drying zones to control the drying of the sludge.
REFERENCES:
patent: 2981528 (1961-04-01), Culp
patent: 3367038 (1968-02-01), Bishop, Sr.
patent: 3850224 (1974-11-01), Vidmar et al.
patent: 4472887 (1984-09-01), Avedian et al.
patent: 5309827 (1994-05-01), Manser et al.
Domingue Hille
Martin James A.
Bennett Henry A.
Doster Dinnatia
Stagg William W.
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