1. CPC Sections
  2. CPC Section F
  3. CPC Class F23
  4. CPC Subclass F23G
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CPC
COOPERATIVE PATENT CLASSIFICATION
​​
F23G
CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION [2018-08]
NOTE

  • This subclass covers also the burning of low-grade fuel of solid, liquid, or gaseous nature.
WARNING

  • In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.
F23G 1/00
Furnaces for cremation of human or animal carcasses [2013-01]
F23G 5/00
Incineration of waste (of specific waste F23G 7/00); Incinerator constructions; Details, accessories or control therefor [2013-01]
F23G 5/002
.
{characterised by their grates (F23G 5/05 takes precedence)} [2013-01]
F23G 5/004
. .
{with endless travelling grates} [2013-01]
F23G 5/006
.
{General arrangement of incineration plant, e.g. flow sheets} [2013-01]
F23G 5/008
.
{adapted for burning two or more kinds, e.g. liquid and solid, of waste being fed through separate inlets} [2013-01]
F23G 5/02
.
with pretreatment [2013-01]
F23G 5/027
. .
pyrolising or gasifying stage (pyrolisation of sludge C02F 11/00; destructive distillation of carbonaceous materials C10B 53/00) [2013-01]
F23G 5/0273
. . .
{using indirect heating} [2013-01]
F23G 5/0276
. . .
{using direct heating} [2013-01]
F23G 5/033
. .
comminuting or crushing [2013-01]
F23G 5/04
. .
drying [2013-01]
F23G 5/05
. . .
using drying grates [2013-01]
F23G 5/08
.
having supplementary heating [2013-01]
F23G 5/085
. .
{High-temperature heating means, e.g. plasma, for partly melting the waste} [2013-01]
F23G 5/10
. .
electric [2013-01]
F23G 5/12
. .
using gaseous or liquid fuel (F23G 5/14 takes precedence) [2013-01]
F23G 5/14
. .
including secondary combustion [2013-01]
F23G 5/16
. . .
in a separate combustion chamber [2013-01]
F23G 5/165
. . . .
{arranged at a different level} [2013-01]
F23G 5/18
. . .
in a stack [2013-01]
F23G 5/20
.
having rotating or oscillating drums [2013-01]
F23G 5/22
. .
the drums being conically shaped [2013-01]
F23G 5/24
.
having a vertical, substantially cylindrical, combustion chamber [2013-01]
F23G 5/245
. .
{with perforated bottom or grate} [2013-01]
F23G 5/26
. .
having rotating bottom [2013-01]
F23G 5/28
. .
having raking arms [2013-01]
F23G 5/30
.
having a fluidised bed [2013-01]
F23G 5/32
.
the waste being subjected to a whirling movement, e.g. cyclonic incinerators [2013-01]
F23G 5/34
.
the waste being burnt in a pit or arranged in a heap for combustion [2013-01]
F23G 5/36
.
having a conical combustion chamber, e.g. "teepee" incinerators (F23G 5/22 takes precedence) [2013-01]
F23G 5/38
.
Multi-hearth arrangements [2013-01]
F23G 5/40
.
Portable or mobile incinerators [2013-01]
F23G 5/42
. .
of the basket type [2013-01]
F23G 5/44
.
Details; Accessories [2013-01]
F23G 5/442
. .
{Waste feed arrangements} [2013-01]
F23G 5/444
. . .
{for solid waste (F23G 5/448 takes precedence)} [2013-01]
F23G 5/446
. . .
{for liquid waste (F23G 5/448 takes precedence)} [2013-01]
F23G 5/448
. . .
{in which the waste is fed in containers or the like} [2013-01]
F23G 5/46
. .
Recuperation of heat [2013-01]
F23G 5/48
. .
Preventing corrosion [2013-01]
F23G 5/50
.
Control or safety arrangements [2013-01]
F23G 7/00
Incinerators or other apparatus for consuming industrial waste, e.g. chemicals (incinerator closets A47K 11/02; oxidation of sludge C02F 11/06; burners in general, burner details F23D; incinerating radioactive waste G21F 9/00) [2013-01]
F23G 7/001
.
{for sludges or waste products from water treatment installations (F23G 5/008 takes precedence)} [2013-01]
F23G 7/003
.
{for used articles} [2013-01]
F23G 7/005
. .
{cars, vehicles} [2013-01]
F23G 7/006
. .
{wires, cables (production and refining of metals C22B, e.g. from scrap to produce non-ferrous metals C22B 7/00; salvaging material from cables H01B 15/003)} [2013-01]
F23G 7/008
.
{for liquid waste (waste oil F23G 7/05, waste liquors F23G 7/04, sludges F23G 7/001)} [2013-01]
F23G 7/02
.
of bagasse, megasse or the like [2013-01]
F23G 7/04
.
of waste liquors, e.g. sulfite liquors [2013-01]
F23G 7/05
.
of waste oils [2013-01]
F23G 7/06
.
of waste gases or noxious gases, e.g. exhaust gases (exhaust apparatus for engines with means for rendering the exhaust innocuous, e.g. by thermal or catalytic conversion, F01N 3/08; combustion of uncombusted material from primary combustion within apparatus for combustion of solid or fluent fuel F23B, {of non combusted material from primary combustion of solid fuels F23B 5/00; of gases produced by primary combustion of solid fuels F23B 90/04}, F23C) [2013-01]
F23G 7/061
. .
{with supplementary heating} [2013-01]
F23G 7/063
. . .
{electric heating} [2013-01]
F23G 7/065
. . .
{using gaseous or liquid fuel} [2013-01]
F23G 7/066
. . . .
{preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator} [2013-01]
F23G 7/068
. . . . .
{using regenerative heat recovery means} [2013-01]
F23G 7/07
. .
in which combustion takes place in the presence of catalytic material [2016-05]
F23G 7/08
. .
using flares, e.g. in stacks [2013-01]
F23G 7/085
. . .
{in stacks} [2013-01]
F23G 7/10
.
of field or garden waste {or biomasses} [2013-01]
F23G 7/105
. .
{of wood waste} [2013-01]
F23G 7/12
.
of plastics, e.g. rubber [2013-01]
F23G 7/14
.
of contaminated soil, e.g. by oil [2013-01]
F23G 2200/00
Waste incineration [2013-01]
F23G 2201/00
Pretreatment [2013-01]
F23G 2201/10
.
Drying by heat [2013-01]
F23G 2201/101
. .
using indirect heat transfer [2013-01]
F23G 2201/20
.
Dewatering by mechanical means [2013-01]
F23G 2201/30
.
Pyrolysing [2013-01]
F23G 2201/301
. .
Treating pyrogases [2013-01]
F23G 2201/302
. .
Treating pyrosolids [2013-01]
F23G 2201/303
. .
Burning pyrogases [2013-01]
F23G 2201/304
. .
Burning pyrosolids [2013-01]
F23G 2201/40
.
Gasification [2013-01]
F23G 2201/50
.
Devolatilising; from soil, objects [2013-01]
F23G 2201/60
.
Separating [2013-01]
F23G 2201/601
. .
different calorific values [2013-01]
F23G 2201/602
. .
different sizes [2013-01]
F23G 2201/603
. .
recyclable material [2018-01]
F23G 2201/70
.
Blending [2013-01]
F23G 2201/701
. .
with additives [2013-01]
F23G 2201/702
. .
with other waste [2013-01]
F23G 2201/80
.
Shredding [2013-01]
F23G 2201/90
.
Cooling [2013-01]
F23G 2202/00
Combustion [2013-01]
F23G 2202/10
.
in two or more stages [2013-01]
F23G 2202/101
. .
with controlled oxidant supply [2013-01]
F23G 2202/102
. .
with supplementary heating [2013-01]
F23G 2202/103
. .
in separate chambers [2013-01]
F23G 2202/104
. .
with ash melting stage [2013-01]
F23G 2202/105
. .
with waste supply in stages [2013-01]
F23G 2202/106
. .
with recirculation of unburned solid or gaseous matter into combustion chamber [2013-01]
F23G 2202/20
.
to temperatures melting waste [2013-01]
F23G 2202/30
.
in a pressurised chamber [2013-01]
F23G 2202/40
.
in a pulsed combustion chamber [2013-01]
F23G 2202/50
.
in a matrix bed combustion chamber [2013-01]
F23G 2202/60
.
in a catalytic combustion chamber [2013-01]
F23G 2202/70
.
with application of specific energy [2013-01]
F23G 2202/701
. .
Electrical fields [2013-01]
F23G 2202/703
. .
Acoustic energy [2013-01]
F23G 2203/00
Furnace arrangements [2013-01]
F23G 2203/10
.
Stoker grate furnace [2013-01]
F23G 2203/101
.
with stepped or inclined grate [2013-01]
F23G 2203/103
.
with roller grate [2013-01]
F23G 2203/105
.
with endless chain or travelling grate [2013-01]
F23G 2203/107
.
with vibrating grate [2013-01]
F23G 2203/20
.
Rotary drum furnace [2013-01]
F23G 2203/201
. .
using oscillating movement [2013-01]
F23G 2203/202
. .
rotating around substantially vertical axis [2013-01]
F23G 2203/203
. .
with conically shaped drum [2013-01]
F23G 2203/204
. .
having non-circular inner cross-section [2013-01]
F23G 2203/205
. .
with water-cooled wall [2013-01]
F23G 2203/206
. .
with charging ports in the sidewall [2013-01]
F23G 2203/207
. .
with air supply ports in the sidewall [2013-01]
F23G 2203/208
. .
with interior agitating members [2013-01]
F23G 2203/209
. .
with variable inclination of rotation axis [2013-01]
F23G 2203/21
. .
with variable speed of rotation [2013-01]
F23G 2203/211
. .
Arrangement of a plurality of drums [2013-01]
F23G 2203/212
. .
Sealing arrangements between rotary and stationary parts [2018-01]
F23G 2203/30
.
Cyclonic combustion furnace [2013-01]
F23G 2203/40
.
Stationary bed furnace [2013-01]
F23G 2203/401
. .
with support for a grate or perforated plate [2013-01]
F23G 2203/403
. .
with substantial cylindrical combustion chamber [2013-01]
F23G 2203/50
.
Fluidised bed furnace [2013-01]
F23G 2203/501
. .
with external recirculation of entrained bed material [2013-01]
F23G 2203/502
. .
with recirculation of bed material inside combustion chamber [2013-01]
F23G 2203/503
. .
with two or more fluidised beds [2013-01]
F23G 2203/504
. .
with essentially horizontal flow of bed material [2013-01]
F23G 2203/505
. .
with fluidised bed rotated as a whole [2013-01]
F23G 2203/60
.
Mobile furnace [2013-01]
F23G 2203/601
. .
carried by a vehicle [2013-01]
F23G 2203/70
.
Modular furnace [2013-01]
F23G 2203/80
.
Furnaces with other means for moving the waste through the combustion zone [2013-01]
F23G 2203/801
. .
using conveyors [2013-01]
F23G 2203/8013
. . .
Screw conveyors [2013-01]
F23G 2203/8016
. . .
Belt conveyors [2013-01]
F23G 2203/803
. .
Rams or pushers [2013-01]
F23G 2203/805
. .
using a rotating hearth [2013-01]
F23G 2204/00
Supplementary heating arrangements [2013-01]
F23G 2204/10
.
using auxiliary fuel [2013-01]
F23G 2204/101
. .
solid fuel [2013-01]
F23G 2204/103
. .
gaseous or liquid fuel [2013-01]
F23G 2204/20
.
using electric energy [2013-01]
F23G 2204/201
. .
Plasma [2013-01]
F23G 2204/202
. .
Laser [2013-01]
F23G 2204/203
. .
Microwave [2013-01]
F23G 2204/204
. .
Induction [2013-01]
F23G 2205/00
Waste feed arrangements [2013-01]
F23G 2205/10
.
using ram or pusher [2013-01]
F23G 2205/101
. .
sequentially operated [2013-01]
F23G 2205/12
.
using conveyors [2013-01]
F23G 2205/121
. .
Screw conveyor [2013-01]
F23G 2205/122
. .
Belt conveyor [2013-01]
F23G 2205/123
. .
Roller conveyor [2013-01]
F23G 2205/124
. .
Chain conveyor [2013-01]
F23G 2205/125
. .
Vibrating conveyor [2013-01]
F23G 2205/14
.
using hopper or bin [2013-01]
F23G 2205/16
.
using chute [2013-01]
F23G 2205/18
.
using airlock systems [2013-01]
F23G 2205/20
.
using airblast or pneumatic feeding [2013-01]
F23G 2206/00
Waste heat recuperation [2013-01]
F23G 2206/10
.
reintroducing the heat in the same process, e.g. for predrying [2013-01]
F23G 2206/20
.
using the heat in association with another installation [2013-01]
F23G 2206/201
. .
with an industrial furnace [2013-01]
F23G 2206/202
. .
with an internal combustion engine [2013-01]
F23G 2206/203
. .
with a power/heat generating installation [2013-01]
F23G 2207/00
Control [2013-01]
F23G 2207/10
.
Arrangement of sensing devices [2013-01]
F23G 2207/101
. .
for temperature [2013-01]
F23G 2207/1015
. . .
Heat pattern monitoring of flames [2013-01]
F23G 2207/102
. .
for pressure [2013-01]
F23G 2207/103
. .
for oxygen [2013-01]
F23G 2207/104
. .
for CO or CO2 [2013-01]
F23G 2207/105
. .
for NOx [2013-01]
F23G 2207/106
. .
for SOx [2013-01]
F23G 2207/107
. .
for halogen concentration [2013-01]
F23G 2207/108
. .
for hydrocarbon concentration [2013-01]
F23G 2207/112
. .
for waste supply flowrate [2013-01]
F23G 2207/113
. .
for oxidant supply flowrate [2013-01]
F23G 2207/114
. .
for combustion bed level [2013-01]
F23G 2207/20
.
Waste supply [2013-01]
F23G 2207/30
.
Oxidant supply [2013-01]
F23G 2207/40
.
Supplementary heat supply [2013-01]
F23G 2207/50
.
Cooling fluid supply [2013-01]
F23G 2207/60
.
Additives supply [2013-01]
F23G 2208/00
Safety aspects [2013-01]
F23G 2208/10
.
Preventing or abating fire or explosion, e.g. by purging [2013-01]
F23G 2209/00
Specific waste [2013-01]
F23G 2209/10
.
Liquid waste [2013-01]
F23G 2209/101
. .
Waste liquor [2013-01]
F23G 2209/102
. .
Waste oil [2013-01]
F23G 2209/103
. .
Bagasse, megasse [2013-01]
F23G 2209/12
.
Sludge, slurries or mixtures of liquids [2013-01]
F23G 2209/14
.
Gaseous waste or fumes [2013-01]
F23G 2209/141
. .
Explosive gases [2013-01]
F23G 2209/142
. .
Halogen gases, e.g. silane [2013-01]
F23G 2209/16
.
Warfare materials, e.g. ammunition [2013-01]
F23G 2209/18
.
Radioactive materials [2013-01]
F23G 2209/20
.
Medical materials [2013-01]
F23G 2209/22
.
Waste papers [2013-01]
F23G 2209/24
.
Contaminated soil; foundry sand [2013-01]
F23G 2209/26
.
Biowaste [2013-01]
F23G 2209/261
. .
Woodwaste [2013-01]
F23G 2209/262
. .
Agricultural waste [2013-01]
F23G 2209/28
.
Plastics or rubber like materials [2013-01]
F23G 2209/281
. .
Tyres [2013-01]
F23G 2209/30
.
Solid combustion residues, e.g. bottom or flyash [2018-01]
F23G 2900/00
Special features of, or arrangements for incinerators [2013-01]
F23G 2900/00001
.
Exhaust gas recirculation [2024-08]
F23G 2900/50001
.
Combination of two or more furnaces [2013-01]
F23G 2900/50002
.
Burning with downwards directed draft through the waste mass [2013-01]
F23G 2900/50003
.
Waste oxidation, pyrolysis or gasification in water under supercritical conditions [2013-01]
F23G 2900/50004
.
Furnace with inclined hearth [2013-01]
F23G 2900/50005
.
Waste in combustion chamber supported on bed made of special materials [2013-01]
F23G 2900/50006
.
Combustion chamber walls reflecting radiant energy within the chamber [2013-01]
F23G 2900/50007
.
Co-combustion of two or more kinds of waste, separately fed into the furnace [2013-01]
F23G 2900/50008
.
Combustion of waste suspended or lifted by upward gas flows [2013-01]
F23G 2900/50009
.
Furnace with progressive waste movements in vertical or steeply inclined direction [2013-01]
F23G 2900/50201
.
Waste pyrolysis, gasification or cracking by indirect heat transfer [2013-01]
F23G 2900/50202
.
Waste pyrolysis, gasification or cracking in presence of catalysts [2013-01]
F23G 2900/50203
.
Waste pyrolysis, gasification or cracking in a mechanically fluidised bed, e.g. obtained by a centrifugal force [2013-01]
F23G 2900/50204
.
Waste pre-treatment by pyrolysis, gasification or cracking [2013-01]
F23G 2900/50205
.
Waste pre-treatment by pyrolysis, gasification or cracking followed by condensation of gas into combustible oil or fat [2013-01]
F23G 2900/50206
.
Pelletising waste before combustion [2013-01]
F23G 2900/50207
.
Thermoforming of plastic waste materials before combustion [2013-01]
F23G 2900/50208
.
Biologic treatment before burning, e.g. biogas generation [2013-01]
F23G 2900/50209
.
Compacting waste before burning [2013-01]
F23G 2900/50211
.
Evaporating, e.g. liquid waste before burning [2013-01]
F23G 2900/50212
.
Extruding waste before combustion [2013-01]
F23G 2900/50213
.
Preheating processes other than drying or pyrolysis [2013-01]
F23G 2900/50214
.
Separating non combustible matters [2013-01]
F23G 2900/50401
.
Drying waste by mixing with drying chemicals, e.g. with CaO [2013-01]
F23G 2900/508
.
Providing additional energy for combustion, e.g. by using supplementary heating [2013-01]
F23G 2900/50801
. .
using the heat from externally heated bodies, e.g. steel balls [2016-11]
F23G 2900/50802
. .
using solid propellant [2013-01]
F23G 2900/50803
. .
using solar energy [2013-01]
F23G 2900/50804
. .
using thermit or other compositions of metal oxides as auxiliary fuel [2013-01]
F23G 2900/51001
. .
using arc discharge electrodes to provide heat [2013-01]
F23G 2900/52001
.
Rotary drums with co-current flows of waste and gas [2013-01]
F23G 2900/52002
.
Rotary drum furnaces with counter-current flows of waste and gas [2013-01]
F23G 2900/52003
.
Rotary drum furnaces with foramenous drum walls, e.g. grate drums [2013-01]
F23G 2900/53801
.
Multi-hearth furnaces with vertical axis [2013-01]
F23G 2900/54001
.
Hearths or supports movable into and from the furnace, e.g. by a conveyor [2013-01]
F23G 2900/54401
.
Feeding waste in containers, bags or barrels [2013-01]
F23G 2900/54402
.
Injecting fluid waste into incinerator [2013-01]
F23G 2900/54601
.
using waste heat for desalinating sea water [2013-01]
F23G 2900/55
.
Controlling; Monitoring or measuring [2013-01]
F23G 2900/55001
. .
Controlling combustion air preheating [2013-01]
F23G 2900/55002
. .
Sensing exhaust gas opacity [2013-01]
F23G 2900/55003
. .
Sensing for exhaust gas properties, e.g. O2 content [2013-01]
F23G 2900/55004
. .
Sensing exhaust gas radioactivity [2013-01]
F23G 2900/55005
. .
Sensing ash or slag properties [2013-01]
F23G 2900/55006
. .
Measuring material flow rates [2013-01]
F23G 2900/55007
. .
Sensors arranged in waste loading zone, e.g. feed hopper level [2013-01]
F23G 2900/55008
. .
Measuring produced steam flow rate [2013-01]
F23G 2900/55009
. .
Controlling stoker grate speed or vibrations for waste movement [2013-01]
F23G 2900/55011
. .
Detecting the properties of waste to be incinerated, e.g. heating value, density [2013-01]
F23G 2900/70
.
Incinerating particular products or waste [2013-01]
F23G 2900/7001
. .
Air bags or seat belt pre-tensioners [2013-01]
F23G 2900/7002
. .
Animal fat, e.g. lard, tallow, stearin [2013-01]
F23G 2900/7003
. .
Incinerating litter from animals, e.g. poultry litter [2013-01]
F23G 2900/7004
. .
Incinerating contaminated animal meals [2013-01]
F23G 2900/7005
. .
Incinerating used asbestos [2013-01]
F23G 2900/7006
. .
Incinerating used automobiles [2013-01]
F23G 2900/7007
. .
Incinerating or pyrolysing used batteries [2013-01]
F23G 2900/7008
. .
Incinerating remains of building materials after demolishing, e.g. fibreglass asphalt shingles [2013-01]
F23G 2900/7009
. .
Incinerating human or animal corpses or remains [2013-01]
F23G 2900/7011
. .
Incinerating PCB-materials [2013-01]
F23G 2900/7012
. .
Incinerating rice or grain husks, hulls or bran [2013-01]
F23G 2900/7013
. .
Incinerating oil shales [2013-01]
F23G 2900/70401
. .
Incinerating drainage water from waste pits of incinerators [2013-01]
F23G 2900/70601
.
Temporary storage means, e.g. buffers for accumulating fumes or gases, between treatment stages [2013-01]