NOVELTY - Waste disposal involves indirectly heating waste input into a heating furnace, packing the interior of furnace with overheated vacuum, closing a discharge passage and overheated vapor supply port connected to the furnace, cutting off supply of heat and collecting heat from the furnace by water cooling, making expandable vacuum space, and indirectly heating and carbonizing the waste that has been subjected to vacuum releasing step.    USE - Used for the disposal of waste such as industrial waste or garbage and thermally degradable natural organics.    ADVANTAGE - Substances harmful to the human body and environmental contaminants can be prevented from being produced in disposal processes and alternative fuel of good quality can be obtained. Time required for the disposal of waste is shortened and disposal expenses are greatly reduced.    DETAILED DESCRIPTION - Waste disposal comprises:    (a) a drying step of heating waste input into a heating furnace and discharging moisture and gas thermally separated from the waste to the outside so as to dry the waste;    (b) an overheated vapor packing step of injecting overheated vapor into the furnace when the furnace reaches at least 70degreesC through the drying step and packing the interior of the furnace with the overheated vapor by causing air or gas to be extracted from the waste due to pressure generated by indirect heat and expandable overheated vacuum vapor and to be diluted and discharged;    (c) a vacuum establishing step of, if the interior of the furnace is packed with the indirect heat and overheated vapor, blocking passages for supplying the indirect heat and overheated vapor, closing a gas discharge valve, circulating cooling water to recover heat from the interior of the heating furnace so that an expandable thermal vacuum space vanishes and thus the interior of the heating furnace becomes a vacuum space, and establishing a vacuum state in the inner space of the furnace so that air or gas remaining deeply in the waste is extracted due to suction generated by the vacuum state and a tendency to maintain an equilibrium state;    (d) a vacuum releasing step of, if air or gas remaining deeply in the waste is extracted with the formation of the vacuum state, heating the furnace using the indirect heat to form an expandable thermal vacuum space and discharging the extracted air or gas to the outside; and    (e) a carbonizing step of carbonizing the waste that has been subjected to the vacuum releasing step by heating the waste using the indirect heat at a high temperature, and delivering combustible gas and carbon obtained in this step to the outside to be stored in respective storage tanks.    An INDEPENDENT CLAIM is also included for a waste disposal apparatus comprising a heating furnace having an inlet, outlet, and discharge port; supporting tubular body installed vertically and centrally in the heating furnace and having an upper end that does not communicate with the inlet and a lower end spaced apart from a bottom surface of the heating furnace; a plate-shaped guide member spirally fixed to an outer surface of the tubular body to guide the downward movement of input waste and to spirally partition an inner space of the heating furnace; a feeder rotatably installed through the supporting tubular body to discharge the waste via the outlet; and a heating pipe, a vapor supply pipe with vapor injection apertures and a cooling pipe which are mounted in parallel and spaced apart from one another on a bottom surface of the guide member and each of which has an upper end and a lower end that penetrate through the periphery of an upper portion and the bottom of the heating furnace to be exposed to the outside, respectively.    DESCRIPTION OF DRAWING(S) - The figure is a flowchart showing a waste disposal process.