Secondary combustion device for woodburning stove

Patent · Tue Jun 16 04:00:00 EDT 1987

OSTI ID:6291105

Craver, R D

This patent describes a wood burning stove including an exhaust flue opening, a combustion chamber for primary combustion having an access door, a support for wood to be burnt and a primary air inlet means for supplying air to support primary combustion of the wood to produce flue gases containing combustible particulate material. A conduit means for directing the flue gases is included from the combustion chamber to the flue opening in a preselected path. Also included is a secondary combustion means for burning particulate material in flue gases before flue gases pass through the exhaust flue opening. The improvement comprises: secondary combustion means including an elongated manifold extending laterally across and above the combustion chamber at a preselected position on the preselected path; a number of air openings spaced longitudinally along the manifold and facing the path of the flue gases and an air inlet means for supplying ambient; secondary combustion air to the manifold for flow from openings into the path of the flue gases in distinct jets; and a laterally elongated passageway above the manifold with upper and lower portions and defined at its upper portion by a sheet metal wall, and a layer of extremely low heat conducting insulation in the passageway. On the sheet metal wall the layer of insulation prevents appreciable conduction of heat from the passageway into the sheet metal wall and flue gases flow through the passageway and from passageway in a generally wide thin flow pattern.

• Assignee: Orrville Products, Inc., Orrville, OH
• Patent Number(s): US 4672946
• OSTI ID: 6291105
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
090400 -- Solid Waste & Wood Fuels-- (-1989)
140504 -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
42 ENGINEERING
421000* -- Engineering-- Combustion Systems
AIR FLOW
APPLIANCES
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION CHAMBERS
DOORS
ELEMENTS
EXHAUST SYSTEMS
FLUE GAS
FLUID FLOW
GAS FLOW
GASEOUS WASTES
JETS
METALS
OPENINGS
OXIDATION
SPACE DEPENDENCE
STOVES
THERMAL INSULATION
THERMOCHEMICAL PROCESSES
WASTES
WOOD
WOOD BURNING APPLIANCES