United States Patent and Trademark Office

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	CPC	COOPERATIVE PATENT CLASSIFICATION

F23J

REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES

{

(from fluidised-bed combustion apparatus F23C 10/24)

}

; FLUES (precipitating dust from flue gases B01D; composition of fuel C10; combustion apparatus for consuming smoke or fumes, e.g. exhaust gases, F23G 7/06)

NOTE

This subclass covers the cleaning of external surfaces of water tubes of boilers

F23J 1/00

Removing ash, clinker, or slag from combustion chamber

{

arrangements for collecting bottom ash and flyash F23J 3/06; removing flyash from flue gas F23J 15/022

}

F23J 1/02

Apparatus for removing ash, clinker, or slag from ash-pits, e.g. by employing trucks or conveyers, by employing suction devices

F23J 1/04

Hand tools, e.g. rakes, prickers, tongs

F23J 1/06

Mechanically-operated devices, e.g. clinker pushers (forming part of the grate F23H)

F23J 1/08

Liquid slag removal

F23J 3/00

Removing solid

{

deposited

}

residues from passages or chambers beyond the fire, e.g. from flues by soot blowers

{

(soot blowers per se F28G 1/16)

}

F23J 3/02

Cleaning furnace tubes; Cleaning flues or chimneys (by means which do not differ materially from the cleaning of any other tube once the fire is out B08B)

F23J 3/023

. .

{

cleaning the fireside of watertubes in boilers

}

F23J 3/026

. .

{

cleaning the chimneys

}

F23J 3/04

Traps

F23J 3/06

Systems for accumulating residues from different parts of furnace plant

F23J 7/00

Arrangement of devices for supplying chemicals to fire (supplying chemicals to fire C10L;

{

to fumes F23J 15/003

}

)

F23J 9/00

Preventing premature solidification of molten combustion residues

F23J 11/00

Devices for conducting smoke or fumes, e.g. flues (

{

removing fumes other than combustion fumes from the area where they are produced, in general B08B 15/00

}

; heat insulation therefor E04B 1/94; chimneys E04H 12/28; removing cooking fumes from domestic stoves or ranges F24C 15/20;

{

fume conduits of furnaces, kilns, ovens, or retorts F27D 17/002

}

)

F23J 11/02

for conducting smoke or fumes originating from various locations to the outside, e.g. in locomotive sheds, in garages

F23J 11/04

in locomotives; in road vehicles; in ships

F23J 11/06

. .

for conducting smoke horizontally

F23J 11/08

for portable apparatus

F23J 11/10

for tents; for log huts; for other inflammable structures

F23J 11/12

Smoke conduit systems for factories or large buildings

F23J 13/00

Fittings for chimneys or flues (staying, stiffening E04H; means for facilitating climbing E06C; draught-inducing apparatus associated with chimneys or flues F23L)

F23J 13/02

Linings; Jackets; Casings

F23J 13/025

. .

{

composed of concentric elements, e.g. double walled (in general F16L; terminals for balanced flue arrangements F23L 17/04)

}

F23J 13/04

Joints; Connections (pipe joints in general F16L)

F23J 13/06

Mouths; Inlet holes

F23J 13/08

Doors or covers specially adapted for smoke-boxes, flues, or chimneys (in general E06B)

F23J 15/00

Arrangement of devices for treating smoke or fumes (treating smoke or fumes, see the relevant class for the treatment, e.g. B01D 53/00)

F23J 15/003

{

for supplying chemicals to fumes, e.g. using injection devices (to fire F23J 7/00)

}

F23J 15/006

{

Layout of treatment plant

}

F23J 15/02

of purifiers, e.g. for removing noxious material (traps for solid

{

deposits

}

F23J 3/04)

F23J 15/022

. .

{

for removing solid particulate material from the gasflow

}

F23J 15/025

. . .

{

using filters

}

F23J 15/027

. . .

{

using cyclone separators

}

F23J 15/04

. .

using washing fluids

{

scrubbers for removing solids only F23J 15/022

}

F23J 15/06

of coolers

F23J 15/08

of heaters

F23J 99/00

Subject matter not provided for in other groups of this subclass

F23J 2211/00

Flue gas duct systems

F23J 2211/10

Balanced flues (combining air supply and flue gas exhaust)

F23J 2211/101

. .

with coaxial duct arrangement

F23J 2211/20

Common flues for several combustion devices

F23J 2211/30

Chimney or flue associated with building ventilation system

F23J 2211/40

Chimney with internal flue pipe system

F23J 2213/00

Chimneys or flues

F23J 2213/10

Linings

F23J 2213/101

. .

Fastening means therefor

F23J 2213/20

Joints; Connections

F23J 2213/201

. .

between stack and branch pipes

F23J 2213/202

. .

between duct or stack sections

F23J 2213/203

. .

between stack/duct and combustion apparatus

F23J 2213/204

. .

Sealing arrangements

F23J 2213/30

Specific materials

F23J 2213/301

. .

flexible

F23J 2213/302

. .

plastic

F23J 2213/303

. .

metallic

F23J 2213/304

. .

ceramic

F23J 2213/305

. .

glass

F23J 2213/40

Heat insulation fittings

F23J 2213/50

Top cover

F23J 2213/60

Service arrangements

F23J 2213/70

Safety arrangements

F23J 2215/00

Preventing emissions (solids only F23J 2217/00)

F23J 2215/10

Nitrogen; Compounds thereof

F23J 2215/101

. .

Nitrous oxide (N2O)

F23J 2215/20

Sulfur; Compounds thereof

F23J 2215/30

Halogen; Compounds thereof

F23J 2215/301

. .

Dioxins; Furans

F23J 2215/40

Carbon monoxide

F23J 2215/50

Carbon dioxide

F23J 2215/60

Heavy metals; Compounds thereof

F23J 2217/00

Intercepting solids

F23J 2217/10

by filters

F23J 2217/101

. .

Baghouse type

F23J 2217/102

. .

electrostatic

F23J 2217/103

. .

ultrafine (HEPA)

F23J 2217/104

. .

High temperature resistant (ceramic) type

F23J 2217/105

. .

Granular bed

F23J 2217/20

by baffles

F23J 2217/30

by screens

F23J 2217/40

by cyclones

F23J 2217/50

by cleaning fluids (washers or scrubbers)

F23J 2217/60

using settling/precipitation chambers

F23J 2219/00

Treatment devices

F23J 2219/10

Catalytic reduction devices

F23J 2219/20

Non-catalytic reduction devices

F23J 2219/201

. .

Reducing species generators, e.g. plasma, corona

F23J 2219/30

Sorption devices using carbon, e.g.coke

F23J 2219/40

Sorption with wet devices, e.g. scrubbers

F23J 2219/50

Sorption with semi-dry devices, e.g. with slurries

F23J 2219/60

Sorption with dry devices, e.g. beds

F23J 2219/70

Condensing contaminants with coolers

F23J 2219/80

Quenching

F23J 2700/00

Ash removal, handling and treatment means; Ash and slag handling in pulverulent fuel furnaces; Ash removal means for incinerators

F23J 2700/001

Ash removal, handling and treatment means

F23J 2700/002

Ash and slag handling in pulverulent fuel furnaces

F23J 2700/003

Ash removal means for incinerators

F23J 2900/00

Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes

F23J 2900/01001

Sorting and classifying ashes or fly-ashes from the combustion chamber before further treatment

F23J 2900/01002

Cooling of ashes from the combustion chamber by indirect heat exchangers (for preheating air F23L 2900/15041)

F23J 2900/01003

Ash crushing means associated with ash removal means

F23J 2900/01004

Separating water from ash

F23J 2900/01005

Mixing water to ash

F23J 2900/01006

Airlock sealing associated with ash removal means

F23J 2900/01007

Thermal treatments of ash, e.g. temper or shock-cooling for granulation

F23J 2900/01009

Controls related to ash or slag extraction

F23J 2900/01021

Removing ashes from the ash pit using reciprocating means, e.g. pushers

F23J 2900/11001

Conducting systems with a gas flow bypass from main flue to an auxiliary flue

F23J 2900/11002

Modelling systems adapted for designing arrangements for conducting or purifying combustion fumes, e.g. flues

F23J 2900/13001

Preventing or reducing corrosion in chimneys

F23J 2900/13002

Initial heating of the flue before starting combustion

F23J 2900/13003

Means for reducing the noise in smoke conducing ducts or systems

F23J 2900/13004

Water draining devices associated with flues

F23J 2900/13005

Protections for chimneys or flue tops against external factors, e.g. birds

F23J 2900/13006

Devices for heating the chimney top to avoid ice formation

F23J 2900/13021

Means for supporting the lining of conducting means, e.g. ducts or chimneys

F23J 2900/13022

Manufacturing processes for the lining of conducting means, e.g. by extrusion

F23J 2900/13023

Ducts with non-circular cross-section

F23J 2900/15001

Irradiating fumes with electron or light beams, e.g. UV, for oxidizing or dissociating SOx and NOx

F23J 2900/15002

Cleaning fumes by letting them to pass a molten metal bath

F23J 2900/15003

Supplying fumes with ozone

F23J 2900/15004

Preventing plume emission at chimney outlet

F23J 2900/15021

Preventing emission of hexavalent chromium at the chimney outlet

F23J 2900/15022

Electrochemical cell filters

F23J 2900/15023

Magnetic filters

F23J 2900/15024

Photocatalytic filters

F23J 2900/15025

Cyclone walls forming heat exchangers

F23J 2900/15026

Cyclone separators with horizontal axis

F23J 2900/15027

Preventing emission of CO2 at the chimney outlet by using sea weeds filters or absorbers

F23J 2900/15041

Means for absorbing SOx using seawater

F23J 2900/15061

Deep cooling or freezing of flue gas rich of CO2 to deliver CO2-free emissions, or to deliver liquid CO2

F23J 2900/15081

Reheating of flue gases