Processing apparatus and processing method

A processing apparatus comprising:

• a cylindrical processing furnace including a supply port configured to receive a processing target on an upstream side and a discharge port configured to discharge a residue on a downstream side;
• a temperature control region including a heater or a cooler configured to control a temperature of the processing furnace at a predetermined position in an intermediate part between the supply port and the discharge port;
• a screw extending from the upstream side of the processing furnace to the downstream side thereof configured to be able to convey the processing target supplied from the supply port toward the discharge port by rotating;
• a first decomposition region including a first recovery port configured to take out a first fluid separated from the processing target in a predetermined region in the intermediate part to outside of the processing furnace;
• and
• a second decomposition region including a second recovery port configured to take out a second fluid separated from the processing target to the outside of the processing furnace, the second decomposition region being positioned on the downstream side of the first decomposition region, and the second fluid being different from the first fluid,
• wherein the screw has a structure in which a pitch of a convey screw part for conveying the processing target varies in a convey direction, and a diameter of a shaft part of the screw varies along the convey direction, and
• wherein the processing furnace further comprises a fluid supply port configured to supply, into the processing furnace, a third fluid including the same components as or different components from those of the first fluid or the second fluid in the intermediate part.