OIL-LIQUEFACTION APPARATUS, AND OlL-LIQUEFACTION METHOD USING SAME

An oil-liquefaction apparatus, which comprises:

• a pyrolysis furnace for pyrolyzing a synthetic resin-containing material that is input, and a condenser for condensing a pyrolysis gas generated in the pyrolysis furnace,
• said pyrolysis furnace including at least a pyrolysis cauldron for holding the material to be treated, a heating furnace for heating the pyrolysis cauldron from the outside, a stirring device for stirring the material within the pyrolysis cauldron, and a discharge section for discharging pyrolysis gas generated in the pyrolysis cauldron to the condenser,
• said pyrolysis cauldron has a bottom portion having a bottom surface formed by a body of revolution of a line segment whose center is convex downward, a substantially cylindrical middle portion having an inner annular surface continuous with the bottom surface, and a lid portion covering an upper portion of the middle portion,
• said heating furnace heats the bottom and at least a lower portion of the middle part of the pyrolysis cauldron,
• said stirring device has a shaft portion that rotates at the center of the pyrolysis cauldron and a blade portion attached to the shaft portion, and the blade portion being brought into sliding contact with the bottom surface and the annular surface by the rotation of the shaft portion, and
• in which a drive unit of said stirring device is provided in the lid of the pyrolysis vessel, and the lid is capable of being opened and closed with respect to the intermediate section, said shaft portion is divided into a lower shaft part to which the blade is attached and an upper shaft part that can be inserted and fitted into the lower shaft part and is connected to the drive unit, and said intermediate section has a shaft holding section that rotatably holds the lower shaft part.

An oil-liquefaction apparatus, which comprises:

• a pyrolysis furnace for pyrolyzing a synthetic resin-containing material that is input, and a condenser for condensing a pyrolysis gas generated in the pyrolysis furnace,
• said pyrolysis furnace including at least a pyrolysis cauldron for holding the material to be treated, a heating furnace for heating the pyrolysis cauldron from the outside, a stirring device for stirring the material within the pyrolysis cauldron, and a discharge section for discharging pyrolysis gas generated in the pyrolysis cauldron to the condenser,
• said pyrolysis cauldron has a bottom portion having a bottom surface formed by a body of revolution of a line segment whose center is convex downward, a substantially cylindrical middle portion having an inner annular surface continuous with the bottom surface, and a lid portion covering an upper portion of the middle portion,
• said heating furnace heats the bottom and at least a lower portion of the middle part of the pyrolysis cauldron,
• said stirring device has a shaft portion that rotates at the center of the pyrolysis cauldron and a blade portion attached to the shaft portion, and the blade portion being brought into sliding contact with the bottom surface and the annular surface by the rotation of the shaft portion, and
• in which a water trap is interposed in the middle of the discharge unit, and the water trap has an inlet pipe for introducing the pyrolysis gas, an outlet pipe for leading the pyrolysis gas that has passed through the water trap to the condenser, and a water contact section for bringing water into contact with the pyrolysis gas.