To provide a multiple-purpose smokeless high-temperature burning furnace that completely burns hazardous gas or the like generated by incomplete combustion of fuel at high temperature, realizes reduction of manufacturing and equipment cost by miniaturizing the device, and simultaneously completely burns fuel material containing hazardous material.
(a) A liquefied material pool 6 for reserving fuel liquified in combustion is installed in a combustion chamber 1. (b) A burning chamber 2 is made adjacent to the combustion chamber 1 so as to cover it, and the heat loss by heat radiation from the outer wall of the combustion chamber 1 is reduced. (c) A sub-burning chamber 11 is arranged in the upper part of the burning chamber 2, burning work suitable for relatively low-temperature heat radiated from the outer wall of burning chamber 2 is enabled, and the effect is utilized for multiple purposes. (d) Sufficient air is replenished from the outside depending on the height and cross-section of a chimney stack 3 calculated so as to provide a strong draft, and high-temperature complete combustion inside the fuel chamber 1 and the burning chamber 2 is enabled.