Heat recuperator and method for use with gas-fired furnace using nozzle or pre-mix burners

Patent · Tue Dec 24 04:00:00 EST 1985

OSTI ID:5745866

Vider, L

A heat recuperator and a method for recuperating heat from a furnace having a nozzle-mix burner to enhance the efficiency of combustion of one or more burners associated with the furnace. The recuperator comprises an exhaust tube which is connectable to a furnace combustion chamber for receiving heated exhaust gas therethrough. The exhaust tube has an outer cylindrical wall and an inner metallic tube concentrically supported therein. An annular space is defined between the outer cylindrical wall and the inner tube. The inner tube is formed, in at least a major length thereof, with a plurality of corrugations. An air inlet connection is provided at an inlet end of the annular space downstream of the exhaust tube. The annular space also has an outlet upstream of the exhaust tube adjacent an inlet end thereof and connectable to a burner supplying same with heated combustion air. A blower is connectable to the inlet to direct the flow of ambient air in the annular space from the inlet to the outlet of the annular chamber. The corrugated wall induces turbulence to the ambient air and also provides a large heated surface area to enhance heat exchange between the heated exhaust gas and the ambient air.

• Assignee: Sivaco Quebec (Canada)
• Patent Number(s): US 4560349
• OSTI ID: 5745866
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320304* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
AIR HEATERS
BLOWERS
BURNERS
COMBUSTION CHAMBERS
DESIGN
EFFICIENCY
ENERGY EFFICIENCY
ENERGY RECOVERY
EQUIPMENT
EXHAUST GASES
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLUIDS
FURNACES
GASEOUS WASTES
GASES
HEAT RECOVERY
HEAT RECOVERY EQUIPMENT
HEATERS
POLLUTION CONTROL EQUIPMENT
RECOVERY
TUBES
TURBULENCE
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
WASTES