METHOD FOR THE POLLUTION-FREE THERMAL PROCESSING OF SOLID MUNICIPAL WASTE AND PLANT FOR CARRYING OUT SAID METHOD

摘要

The method for the pollution-free thermal processing of solid municipal waste comprises drying the above-mentioned waste before feeding the waste into a smelting furnace with gaseous nitrogen which is heated to 200-300°C by the heat accumulated by a liquid-metal heat carrier during the cooling of the body of a smelting chamber, loading said waste at a controllable speed into the smelting chamber, and burning organic constituents in an oxygen atmosphere on a surface of molten slag produced in the smelting chamber from mineral constituents of the waste and from added fusing agents. The gases formed are transferred along a cooling pipe to a high-energy boiler where said gases are completely combusted and the heat from the gases being produced is utilized. The rate of continuous discharge of slag surplus from the chamber is maintained at a level ensuring the presence of a constant quantity of slag in the chamber. An apparatus for realizing the described method is described. The technical result involves preventing the formation of dioxins and furans by maintaining a rational ratio of the mass of waste being loaded in a unit of time to the mass of molten slag located in the smelting chamber, and increasing the degree of use of the heat removed by the nitrogen from the metal heat carrier in a system of secondary cooling of the smelting chamber.