Patent ID: 8465278
Filing Date: 2013-06-18
Classification: F23L,F27B,F27D,Y02E

Abstract:
1. An apparatus for recovery of heat from a shell of a circular-shaped rotary kiln having an axial length and an outer surface, comprising: at least one enclosure in the form of a stationary housing spaced from and extending along at least a portion of the axial length of rotary kiln, the housing having an opening extending axially therealong so as to expose a portion of the shell, and opposed spaced circumferential ends on the housing; flexible closure flaps provided along the axially extending opening and attached to the circumferential ends of the housing extending towards the shell, which at least partially close the space extending between the circumferential ends of the housing and the shell so as to retain heat discharged from the shell in a chamber formed between the shell and the housing; an exhaust fan for drawing a flow of air into the housing, which flow of air recovers heat from the shell in the chamber, and discharges resultant heated air from the chamber; and means to recover heat from the heated air discharged from the chamber.