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U.S. Department of Energy
Office of Scientific and Technical Information

Multi-zone boiler for firing with solid and liquid fuel

Patent ·
OSTI ID:6381267
A furnace for alternatively burning solid or liquid fuels is disclosed. The furnace includes an oil burner and a solid fuel burner as well as a combustion chamber for the burning fuel. The hot combustion gases can be introduced through one of two sets of chimney gas flues, depending upon the fuel being burned. A tiltable flap at the inlet of the chimney gas flues controls which set of flues the gas passes through. At the outlet of the flues, a reversing chamber reverses the direction of the gases and directs them to a flue gas pipe for removing the combustion gases from the furnace. The position of the tiltable flap is controlled by a control means responsive to the sensed temperature of the gas leaving the furnace. The chimney gas flues define a heat exchanger and may be formed from flat plates or round ducts.
Assignee:
EDB-83-069075
Patent Number(s):
US 4367697
OSTI ID:
6381267
Country of Publication:
United States
Language:
English

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