Heat recovery device for exhaust flues

Patent · Tue Jun 24 00:00:00 EDT 1986

OSTI ID:5581318

Knoch, D G

A device is described for recovering and recirculating heat normally lost from the exhaust flue of a stove, furnace or the like having a cylindrical flue. The device consisting of: a section of cylindrical flue pipe which has opposite ends adapted for connection to the existing flue, which has an inside diameter substantially the same as that of the existing cylindrical flue and through which the hot flue gases flow; heating tubes extending diametrically through the flue pipe section so that the hot flue gases flow over the outer surfaces thereof, the heating tubes having opposite air inlet and discharge ends and being disposed in a single row; a housing defining an air flow chamber surrounding the portion of the flue pipe section containing the heating tubes, the housing having an ambient air inlet on the same side of the flue pipe section as the inlet ends of the heating tubes and a heated air outlet on the same side of the flue pipe section as the discharge ends of the heating tubes; fan means inside the housing for drawing ambient air into the housing through the air inlet and propelling a flow air toward the heated air outlet, both through the heating tubes and over the outer surface of the portion of the flue pipe section; and a disc-shaped catalytic combustor mounted inside the flue pipe section upstream of the heating tubes for rotational movement between a starting position generally parallel to the flow of flue gases and an operating position generally perpendicular to the flow of the flue gases.

• Assignee: Miracle Heat, Inc., P.O. Box 81, Gladstone, MI 49837
• Patent Number(s): US 4596288
• OSTI ID: 5581318
• Resource Relation: Patent File Date: Filed date 27 Feb 1985
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
FLUE GAS
HEAT RECOVERY
FURNACES
HEAT RECOVERY EQUIPMENT
DESIGN
STOVES
AIR FLOW
BLOWERS
CATALYTIC COMBUSTORS
EXHAUST SYSTEMS
GAS FLOW
PIPES
ROTATION
WASTE HEAT UTILIZATION
APPLIANCES
COMBUSTORS
ENERGY RECOVERY
EQUIPMENT
FLUID FLOW
GASEOUS WASTES
MOTION
RECOVERY
WASTE PRODUCT UTILIZATION
WASTES
421000* - Engineering- Combustion Systems