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Apparatus for treating oil shale by microwave energy for recovering heated volatile fractions thereof. The microwave oven includes a sloping feeder made of glass, pyrex, or ceramic material, which feeder is reciprocated back and forth along a declining plane so as to advance slowly but progressively

Apparatus for treating oil shale by microwave energy for recovering heated volatile fractions thereof. The microwave oven includes a sloping feeder made of glass, pyrex, or ceramic material, which feeder is reciprocated back and forth along a declining plane so as to advance slowly but progressively oil shale deposited on the top end thereof to the discharge end of the vibrator. Means are provided to evacuate volatile fractions and to feed such gases through preheater tubes to a condenser unit. The preheater tubes are disposed in line with and through the flow of incoming materials so as to tend to regulate material descent as well as preheat the shale. An additional solids heat exchanger is employed underneath the discharge end of the vibratory feeder means so as to slow the descent of the spent shale onto its ultimate conveyor as well as taking heat therefrom and from the magnetron tubes of the oven to conduct such heat upwardly to further increase the preheating effect upon incoming shale. Condenser units are employed and a prime mover-generator unit are used to utilize a portion of the recovery for ultimately powering such magnetron tubes to produce the electro-magnetic wave energy necessary to heat the shale and vaporize its bituminous constituents.

대표청구항 ▼

Oil shale processing apparatus including, in combination, a microwave oven having a continuous throughput conveyor passing through said oven and provided with a feed and a discharge end, said conveyor ends being disposed on opposite sides of and exterior with respect to said oven, first means couple

Oil shale processing apparatus including, in combination, a microwave oven having a continuous throughput conveyor passing through said oven and provided with a feed and a discharge end, said conveyor ends being disposed on opposite sides of and exterior with respect to said oven, first means coupled to said oven for applying a negative pressure therein said for withdrawing vapors and gases from the interior of said oven, an input hopper, first and second heat exchanger means disposed between said hopper and said conveyor feed end, said first heat exchanger being coupled to said first means for preheating incoming oil shale ore by said withdrawn vapors and gases as said oil shale passes from said hopper through said first heat exchanger means to said conveyor feed end, said second heat exchanger means being proximate to and operably separate from said first heat exchanger means to additionally preheat said incoming oil shale, a spent-shale heat exchanger disposed underneath said discharge end of the conveyor for heating air with spent shale, an air blower in communication with said spent-shale heat exchanger, conduit means for air-flow coupling said spent-shale heat exchanger to said second heat exchanger means, and third means for recovering said withdrawn vapors and gases coupled to said first means subsequent to said first heat exchaNger means.