초록 ▼

Method and apparatus to recover energy from waste by means of combustion of such waste in industrial furnaces, particularly of the rotary type, that has an external calciner, feeding such waste into the tertiary air duct of the calciner and burning the waste inside the duct itself, to efficiently ma

Method and apparatus to recover energy from waste by means of combustion of such waste in industrial furnaces, particularly of the rotary type, that has an external calciner, feeding such waste into the tertiary air duct of the calciner and burning the waste inside the duct itself, to efficiently make use of the energy produced by such combustion, as a contribution of the total cost of fuel necessary to operate the industrial furnace. The method and apparatus permit the elimination of hazardous wastes that are efficiently disassociated when burned sufficiently to produce effluents that are typically non-toxic, producing greatly reduced or even no atmospheric pollution nor environmental damage.

대표청구항 ▼

1. A method to utilize the energy content of an at least partially combustible organic-containing waste in a system for heat treating inorganic particles in a rotary furnace, comprising:subjecting the raw inorganic particles to at least one of the steps of preheating and calcining; thereafter heat t

1. A method to utilize the energy content of an at least partially combustible organic-containing waste in a system for heat treating inorganic particles in a rotary furnace, comprising:subjecting the raw inorganic particles to at least one of the steps of preheating and calcining; thereafter heat treating the inorganic particles at a higher temperature in the rotary furnace; cooling with air the inorganic particles discharged from the rotary furnace in a manner to elevate the temperature of at least a first portion of the air sufficiently to be capable of decomposing the combustible portion of the waste; flowing the hot exhaust gases from the rotary furnace to use in at least one of the preheating and calcining steps; flowing through a tertiary air duct said hot first portion of the air used to cool the inorganic particles discharged from the rotary furnace; feeding the waste, continuously or in batches, directly into the tertiary air duct at a position therealong, at a rate, and in a condition so as to be effectively largely decomposed and at least partially burned by the hot air flowing therethrough; discharging from the tertiary air duct any air and the resulting decomposition and combustion gases ultimately to feed at least one of the preheating and calcining steps wherein the burning of any decomposition gases is completed; and removing from the tertiary air duct any solid residues remaining therein from the decomposed waste.