PREHEATING METHOD FOR AIR FOR REFUSE INCINERATOR UTILIZING CHIMNEY

PURPOSE: To effectively utilize the content discharged to the atmosphere of exhaust gas energy by a method wherein air is preheated through heat-exchange between air and exhaust gas from a refuse incinerator, flowing through the inner cylinder for discharge of exhaust gas from a chimney, and preheated air is fed to the incinerator. CONSTITUTION: The outside of an inner cylinder 8 for discharge of exhaust gas in a chimney 7 is covered with a heat insulation material 9, such as rock wool, and an air chamber 10 is formed between the inner cylinder 8 and an outer decorative wall 11. Air for combustion fed to an incinerator 2 is preheated by utilizing an air chamber 10 of the chimney 7. Namely, preheated air is fed to the air chamber 10 from an openable vent 12 located between the chimney 7 and raised while it is gradually heated by exhaust gas fed in the inner cylinder 8 by an induced blower 6. Heated air is fed to the incinerator 2 through an upper outlet 14 by a blower 13. This constitution effectively utilizes quantities of discharged exhaust gas energy.