METHOD OF UTILIZATION OF WASTES Russian patent published in 1998 - IPC

FIELD: utilization of wastes. SUBSTANCE: method includes preliminary cooling of wastes by means of cold gaseous nitrogen of air separating plant bled after subcooling of vat liquid and final additional cooling of air followed by cooling of wastes with liquid nitrogen taken from air separating plant. Gaseous nitrogen used for preliminary cooling may be cooled additionally. For obtaining liquid nitrogen together with utilization of wastes by burning, oxygen for burning is taken from air separating plant. Oxygen from air separating plant is also used for after burning and decontamination of flue gases. EFFECT: enhanced efficiency. 4 cl, 2 dwg