Apparatus for firing solid fuels

Patent · Tue May 08 04:00:00 EDT 1984

OSTI ID:6452466

Lovgren, A

This invention relates to a boiler installation for the combustion of solid fuels, for example forest waste material in the form of e.g. bark and/or chips, peat pellets, coal etc., which installation comprises a furnace located in connection to a heat medium portion and a grate located in the furnace. The grate feeds fuel from a fuel charge opening through the furnace while the fuel is being combusted, from which furnace the flue gases flow to the heat medium portion and continue to a chimney. The installation also includes at least one intake for controlled supply of combustion air in the form of at least primary and secondary combustion air. In order to improve the efficiency degree of such boiler installations and to render possible efficient and complete combustion of forest waste material and other biologic fuels, which may have a high moisture content, the rear portion of the grate means of the boiler installation, seen in the direction of movement, is located outside of the furnace space proper but connected thereto for forming a zone in connection to the charge opening for a certain drying of the fuel before it is fed into the furnace by the grate. The grate comprises transverse dogs running on a grate plane for advancing the fuel through the furnace, which grate plane is located above an arrangement for the supply of the primary combustion air from below to the fuel, and below the air intakes for the secondary combustion air.

• Assignee: HB Megaron (Sweden)
• Patent Number(s): US 4446800
• OSTI ID: 6452466
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420900 -- Engineering-- Waste Processing Plants & Equipment-- (-1989)
421000* -- Engineering-- Combustion Systems
AIR FLOW
BIOLOGICAL MATERIALS
BOILER FUELS
BOILERS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTION CONTROL
CONTROL
DESIGN
DRYING
ENERGY SOURCES
FLUID FLOW
FOREST LITTER
FOSSIL FUELS
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
FUELS
FURNACES
GAS FLOW
MATERIALS
MOISTURE
ORGANIC MATTER
OXIDATION
PEAT
SOLID FUELS
THERMOCHEMICAL PROCESSES