Patent ID: 6877444

Claim:
An intermittent flow type thermal decomposition system for thermally decomposing wastes, comprising: a crucible for thermally decomposing the wastes in a vacuum, said crucible having a cylindrical shape, and an inlet and an outlet at opposing ends thereof, and an interior having a spiral groove formed in an inner wall thereof; a frame; a rotary furnace held rotatably by said frame, with an interior and said crucible being installed in the interior of said rotary furnace; a heating device disposed inside said rotary furnace and outside said crucible; a drive unit for rotating said rotary furnace; a feed box for receiving said wastes and for introducing the received wastes into said crucible, said feed box communicating with said inlet of said crucible and supported by said frame; a discharge box communicating with said outlet of said crucible and supported by said frame; a first shutter device installed in said feed box for hermetically sealing said interior of said crucible from the exterior in a closed position and for, in an open position, allowing wastes from the feed box to enter the interior of said crucible; a second shutter device installed in said discharge box for hermetically sealing said interior of said crucible from the exterior in a closed position and for, in an open position, discharging the thermally decomposed wastes from the discharge box; and a suction device connected with said discharge box for evacuating the interior of said crucible to form the vacuum in said crucible and for discharging gases from the interior of said crucible by suction, said gases being produced when the wastes are decomposed by said heating device.