TUBULAR PREHEATER Russian patent published in 2003 - IPC

FIELD: tubular preheaters. SUBSTANCE: proposed tubular preheater includes metal cylindrical reservoir with furnace inside its lower portion, at least one burner unit, liquid intermediate heat-transfer agent and two product coils located upper portion of reservoir. Furnace has at least one outlet connected to smoke stack. Metal cylindrical reservoir containing liquid heat-transfer agent is mounted horizontally. Expansion tank mounted at the top of reservoir by means of two branch pipes is provided with breathing valve; ventilation unit connected to burner unit is mounted near one wall of reservoir. EFFECT: enhanced efficiency of heat exchange; reduced carbonization; enhanced safety of servicing. 11 cl, 3 dwg