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Outline
Indent Level
Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
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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

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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
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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)
}
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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
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
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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
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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
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Fittings for chimneys or flues (staying, stiffening E04H; means for facilitating climbing E06C; draught-inducing apparatus associated with chimneys or flues F23L)
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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)
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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
}
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F23J 15/02
.
of purifiers, e.g. for removing noxious material (traps for solid
{
deposits
}
F23J 3/04)
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F23J 15/022
. .
{
for removing solid particulate material from the gasflow
}
F23J 15/025
. . .
{
using filters
}
F23J 15/027
. . .
{
using cyclone separators
}
. .
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
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F23J 2211/00
Flue gas duct systems
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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
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F23J 2213/00
Chimneys or flues
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F23J 2213/10
.
Linings
F23J 2213/101
. .
Fastening means therefor
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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
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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
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F23J 2215/00
Preventing emissions (solids only F23J 2217/00)
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F23J 2215/10
.
Nitrogen; Compounds thereof
F23J 2215/101
. .
Nitrous oxide (N2O)
F23J 2215/20
.
Sulfur; Compounds thereof
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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
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F23J 2217/00
Intercepting solids
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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
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F23J 2219/00
Treatment devices
F23J 2219/10
.
Catalytic reduction devices
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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
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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
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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
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013