SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES

Introduced: September 1968

Classification Context

Section:: MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:: COMBUSTION APPARATUS; COMBUSTION PROCESSES
Subclass:: SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES

Description

F23L encompasses equipment and systems for managing air supply and draught in combustion apparatus, including specialized valves, dampers, and draught-inducing devices. It covers delivery mechanisms for air and non-combustible fluids to furnaces, boilers, and similar combustion systems, as well as physical components like chimney tops and flue terminals that regulate gas flow and prevent downdrafts. This classification excludes fuel supply systems (covered elsewhere in F23) and focuses specifically on the oxidant/air side of combustion control and ventilation management.

Scope Notes

Glossary: Air a mixture of gases containing free oxygen and able to promote or support combustion Primary air air supplied to the burning fuel (e.g. together with the fuel) in order to liberate combustible gases Secondary air air supplied to the combustible gases liberated by the primary air in order to complete their combustion. The expression "secondary air" covers "tertiary air" etc. Burner Burners a device by which fluid fuel or pulverised solid fuel suspended in air is passed to a combustion space where it burns to produce a self-supporting flame. A burner includes the means for feeding air that are arranged in immediate connection with a fuel feeding conduit, for example concentric with it. Combustion a heat-producing sequence of chemical reactions between a burnable substance and molecular oxygen, e.g. in air, in most cases generating light in the form of flames or a glow Combustion chamber combustion chambers a chamber in which fuel is burned to establish a self-supporting fire or flame and which surrounds that fire or flame Firebridge Firebridges a low wall separating the fuel bed from adjacent flue gas passages in apparatus for combustion of solid fuel, for example in reverberatory furnaces or fire-tube boilers Flue gases flue gas any gaseous products of combustion Grate Grates a perforated surface (e.g. a grid) which supports or delimits a bed of burning solid fuel and serves to supply primary air | Limiting references: Returning flue gases to the combustion chamber of combustion apparatus for solid fuel Returning flue gases to the combustion chamber of combustion apparatus for liquid or gaseous fuel or pulverised solid fuel suspended in air Grates for combustion apparatus Supplying chemicals to fires Firebridges for delivery of air or steam to combustion apparatus Cooling of casings, lining or walls of combustion chambers Doors specially adapted for combustion chambers Baffles or deflectors in air inlets of combustion chambers Baffles or deflectors for air or combustion products with air-supply passages | Application references: Steam generators Air supply specially adapted for combustion apparatus for liquid, gaseous or pulverised fuel Supply of fluidisation air for fluidised bed combustion apparatus Burners Burners where spraying of liquid fuel is induced by a gaseous medium Gas burners specially adapted for use with means for pressurising the combustionair Regulating or controlling air supply or draught Systems for regulating or controlling combustion Air inlet arrangements for combustion chambers for generating combustion products of high pressure or high velocity, e.g. for gas turbine combustion chambers Draught control dampers for solid fuel stoves with open fires Air supply in solid fuel stoves with open fires Hoods for solid fuel stoves with open fires Combustion-air or flue gas circulation in or around solid fuel stoves Stoves for combustion of gaseous or liquid fuels, or for two or more different fuels Fluid heaters, e.g. water or air heaters for central heating

Related Keywords

producing BLAST in combustion apparatus in generalarrangement of BLOWERS in combustion apparatusdraught-inducing tops or caps for CHIMNEY(S)air supply for COMBUSTION in generaldraught-inducing for COMBUSTION in generalchimney COWLSarrangement or construction of DAMPERS in combustion apparatus in generalinducing DRAUGHT(S) for combustionarrangement of air RECUPERATORS in combustion apparatusarrangement of air-heating regenerators in combustion apparatusREGISTERS [= dampers]arrangements or constructions of air-controlling VALVES in combustion apparatus in general

10 direct subcodes

Child Classifications

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F23L 1/00 Passages or apertures for delivering primary air for combustion
F23L 11/00 Arrangements of valves or dampers after the fire
F23L 13/00 Construction of valves or dampers for controlling air supply or draught
F23L 15/00 Heating of air supplied for combustion
F23L 17/00 Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
F23L 3/00 Arrangements of valves or dampers before the fire
F23L 5/00 Blast-producing apparatus before the fire
F23L 7/00 Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
F23L 9/00 Passages or apertures for delivering secondary air for completing combustion of fuel
F23L 99/00 Subject matter not provided for in other groups of this subclass