Chip wood furnace and furnace retrofitting system

Patent · Tue Jan 26 04:00:00 EST 1982

OSTI ID:5709407

Huff, E R; Riley, J G; Smith, N; Worcester, D C

A furnace system suitable for independent use and for retrofitting conventional central heating oil furnaces to permit controlled continuous and efficient combustion of fragmented wood type fuels is described. Wood chips or other fuel fragments are trickle fed into a refractory wood type combustion chamber. For retrofitting an oil furnace the oil burner gun is removed. A flame tube adapter couples the wood type fuel combustion chamber into the oil combustion chamber and heat exchanger plenum of the conventional furnace. The oil burner gun of the retrofitted furnace is used to ignite the wood chips or other fuel fragments during start up. A blower establishes forced draft. The furnace system includes automatic controls for sequencing operation of the elements of the retrofitting furnace system. An independent wood chip furnace system is also described.

• Assignee: Board Of Trustees Of Univ Of Maine
• Patent Number(s): US 4312278
• OSTI ID: 5709407
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
APPLIANCES
BLOWERS
COMBUSTION CHAMBERS
CONTROL EQUIPMENT
DESIGN
DRAFT CONTROL SYSTEMS
EQUIPMENT
FLOW REGULATORS
FURNACES
HEAT EXCHANGERS
HEATING
OIL FURNACES
RETROFITTING
SOLID WASTES
SPACE HEATING
WASTES
WOOD BURNING APPLIANCES
WOOD BURNING FURNACES
WOOD WASTES