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Wood or coal burning heater

Patent ·
OSTI ID:6282461

This patent describes a wood and coal burning heater comprising a housing having a front surface, a rear surface, a bottom surface and a side surface and a top surface having a chimney opening; and a normally closed primary combsution chamber for the combustion of wood and coal within the housing. The combustion chamber has a top wall and a rear wall spaced inwardly from the top and rear surfaces of the housing forming horizontal and vertical smoke passages respectively; and a door opening in the front surface for access to the primary combustion chamber and a door for tightly closing the door opening; and a secondary combustion chamber positioned below the primary combustion chamber for the burning of combustible smoke. Gas and ash pass downwardly from the primary combustion chamber, the secondary combustion chamber is lined along its bottom and sides with insulating refractory material and having a narrow opening in the bottom for the downward discharge of ashes into an air-tight ash drawer; the primary and secondary combustion chambers are separated by a grate of high-temperature ceramic refractory material which is provided with two narrow spaced slots which are aligned in front of rear direction; and an elongate air supply tube positioned immediately below and in parallel alignment with the slots in the grate with the air supply tube having air supply orifices positioned beneath the slots for the discharge of air for secondary combustion.

Assignee:
NOV; NOV-87-072113; EDB-87-149828
Patent Number(s):
US 4677965
OSTI ID:
6282461
Country of Publication:
United States
Language:
English

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Related Subjects

01 COAL, LIGNITE, AND PEAT
014000 -- Coal
Lignite
& Peat-- Combustion
09 BIOMASS FUELS
090400 -- Solid Waste & Wood Fuels-- (-1989)
140504 -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
42 ENGINEERING
421000* -- Engineering-- Combustion Systems
AEROSOLS
AIR FLOW
APPLIANCES
CARBONACEOUS MATERIALS
CERAMICS
CHEMICAL REACTIONS
CHIMNEYS
COAL
COLLOIDS
COMBUSTION
COMBUSTION CHAMBERS
DESIGN
DISPERSIONS
ENERGY SOURCES
FLUE GAS
FLUID FLOW
FOSSIL FUELS
FUEL SUBSTITUTION
FUELS
FURNACES
GAS FLOW
GASEOUS WASTES
HEATERS
MATERIALS
OPENINGS
OPERATION
ORIFICES
OXIDATION
POSITIONING
REFRACTORIES
RESIDUES
SMOKES
SOLS
THERMOCHEMICAL PROCESSES
WASTES
WOOD
WOOD BURNING APPLIANCES
WOOD BURNING FURNACES