F23G

CREMATION FURNACES

CONSUMING WASTE PRODUCTS BY COMBUSTION

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

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.

F23G1/00

Furnaces for cremation of human or animal carcasses

F23G5/00

Incineration of waste of specific waste F23G7/00

Incinerator constructions

Details, accessories or control therefor

F23G5/002

characterised by their grates F23G5/05 takes precedence

F23G5/004

with endless travelling grates

F23G5/006

General arrangement of incineration plant, e.g. flow sheets

F23G5/008

adapted for burning two or more kinds, e.g. liquid and solid, of waste being fed through separate inlets

F23G5/02

with pretreatment

F23G5/027

pyrolising or gasifying stage pyrolisation of sludge C02F11/00; destructive distillation of carbonaceous materials C10B53/00

F23G5/0273

using indirect heating

F23G5/0276

using direct heating

F23G5/033

comminuting or crushing

F23G5/04

drying

F23G5/05

using drying grates

F23G5/08

having supplementary heating

F23G5/085

High-temperature heating means, e.g. plasma, for partly melting the waste

F23G5/10

electric

F23G5/12

using gaseous or liquid fuel F23G5/14 takes precedence

F23G5/14

including secondary combustion

F23G5/16

in a separate combustion chamber

F23G5/165

arranged at a different level

F23G5/18

in a stack

F23G5/20

having rotating or oscillating drums

F23G5/22

the drums being conically shaped

F23G5/24

having a vertical, substantially cylindrical, combustion chamber

F23G5/245

with perforated bottom or grate

F23G5/26

having rotating bottom

F23G5/28

having raking arms

F23G5/30

having a fluidised bed

F23G5/32

the waste being subjected to a whirling movement, e.g. cyclonic incinerators

F23G5/34

the waste being burnt in a pit or arranged in a heap for combustion

F23G5/36

having a conical combustion chamber, e.g. "teepee" incinerators F23G5/22 takes precedence

F23G5/38

Multi-hearth arrangements

F23G5/40

Portable or mobile incinerators

F23G5/42

of the basket type

F23G5/44

Details

Accessories

F23G5/442

Waste feed arrangements

F23G5/444

for solid waste F23G5/448 takes precedence

F23G5/446

for liquid waste F23G5/448 takes precedence

F23G5/448

in which the waste is fed in containers or the like

F23G5/46

Recuperation of heat

F23G5/48

Preventing corrosion

F23G5/50

Control or safety arrangements

F23G7/00

Incinerators or other apparatus for consuming industrial waste, e.g. chemicals incinerator closets A47K11/02; oxidation of sludge C02F11/06; burners in general, burner details F23D; incinerating radioactive waste G21F9/00

F23G7/001

for sludges or waste products from water treatment installations F23G5/008 takes precedence

F23G7/003

for used articles

F23G7/005

cars, vehicles

F23G7/006

wires, cables production and refining of metals C22B, e.g. from scrap to produce non-ferrous metals C22B7/00; salvaging material from cables H01B15/003

F23G7/008

for liquid waste waste oil F23G7/05, waste liquors F23G7/04, sludges F23G7/001

F23G7/02

of bagasse, megasse or the like

F23G7/04

of waste liquors, e.g. sulfite liquors

F23G7/05

of waste oils

F23G7/06

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, F01N3/08; 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 F23B5/00; of gases produced by primary combustion of solid fuels F23B90/04

, F23C

F23G7/061

with supplementary heating

F23G7/063

electric heating

F23G7/065

using gaseous or liquid fuel

F23G7/066

preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator

F23G7/068

using regenerative heat recovery means

F23G7/07

in which combustion takes place in the presence of catalytic material

F23G7/08

using flares, e.g. in stacks

F23G7/085

in stacks

F23G7/10

of field or garden waste

or biomasses

F23G7/105

of wood waste

F23G7/12

of plastics, e.g. rubber

F23G7/14

of contaminated soil, e.g. by oil

F23G2200/00

Waste incineration

F23G2201/00

Pretreatment

F23G2201/10

Drying by heat

F23G2201/101

using indirect heat transfer

F23G2201/20

Dewatering by mechanical means

F23G2201/30

Pyrolysing

F23G2201/301

Treating pyrogases

F23G2201/302

Treating pyrosolids

F23G2201/303

Burning pyrogases

F23G2201/304

Burning pyrosolids

F23G2201/40

Gasification

F23G2201/50

Devolatilising

from soil, objects

F23G2201/60

Separating

F23G2201/601

different calorific values

F23G2201/602

different sizes

F23G2201/603

recyclable material

F23G2201/70

Blending

F23G2201/701

with additives

F23G2201/702

with other waste

F23G2201/80

Shredding

F23G2201/90

Cooling

F23G2202/00

Combustion

F23G2202/10

in two or more stages

F23G2202/101

with controlled oxidant supply

F23G2202/102

with supplementary heating

F23G2202/103

in separate chambers

F23G2202/104

with ash melting stage

F23G2202/105

with waste supply in stages

F23G2202/106

with recirculation of unburned solid or gaseous matter into combustion chamber

F23G2202/20

to temperatures melting waste

F23G2202/30

in a pressurised chamber

F23G2202/40

in a pulsed combustion chamber

F23G2202/50

in a matrix bed combustion chamber

F23G2202/60

in a catalytic combustion chamber

F23G2202/70

with application of specific energy

F23G2202/701

Electrical fields

F23G2202/703

Acoustic energy

F23G2203/00

Furnace arrangements

F23G2203/10

Stoker grate furnace

F23G2203/101

with stepped or inclined grate

F23G2203/103

with roller grate

F23G2203/105

with endless chain or travelling grate

F23G2203/107

with vibrating grate

F23G2203/20

Rotary drum furnace

F23G2203/201

using oscillating movement

F23G2203/202

rotating around substantially vertical axis

F23G2203/203

with conically shaped drum

F23G2203/204

having non-circular inner cross-section

F23G2203/205

with water-cooled wall

F23G2203/206

with charging ports in the sidewall

F23G2203/207

with air supply ports in the sidewall

F23G2203/208

with interior agitating members

F23G2203/209

with variable inclination of rotation axis

F23G2203/21

with variable speed of rotation

F23G2203/211

Arrangement of a plurality of drums

F23G2203/212

Sealing arrangements between rotary and stationary parts

F23G2203/30

Cyclonic combustion furnace

F23G2203/40

Stationary bed furnace

F23G2203/401

with support for a grate or perforated plate

F23G2203/403

with substantial cylindrical combustion chamber

F23G2203/50

Fluidised bed furnace

F23G2203/501

with external recirculation of entrained bed material

F23G2203/502

with recirculation of bed material inside combustion chamber

F23G2203/503

with two or more fluidised beds

F23G2203/504

with essentially horizontal flow of bed material

F23G2203/505

with fluidised bed rotated as a whole

F23G2203/60

Mobile furnace

F23G2203/601

carried by a vehicle

F23G2203/70

Modular furnace

F23G2203/80

Furnaces with other means for moving the waste through the combustion zone

F23G2203/801

using conveyors

F23G2203/8013

Screw conveyors

F23G2203/8016

Belt conveyors

F23G2203/803

Rams or pushers

F23G2203/805

using a rotating hearth

F23G2204/00

Supplementary heating arrangements

F23G2204/10

using auxiliary fuel

F23G2204/101

solid fuel

F23G2204/103

gaseous or liquid fuel

F23G2204/20

using electric energy

F23G2204/201

Plasma

F23G2204/202

Laser

F23G2204/203

Microwave

F23G2204/204

Induction

F23G2205/00

Waste feed arrangements

F23G2205/10

using ram or pusher

F23G2205/101

sequentially operated

F23G2205/12

using conveyors

F23G2205/121

Screw conveyor

F23G2205/122

Belt conveyor

F23G2205/123

Roller conveyor

F23G2205/124

Chain conveyor

F23G2205/125

Vibrating conveyor

F23G2205/14

using hopper or bin

F23G2205/16

using chute

F23G2205/18

using airlock systems

F23G2205/20

using airblast or pneumatic feeding

F23G2206/00

Waste heat recuperation

F23G2206/10

reintroducing the heat in the same process, e.g. for predrying

F23G2206/20

using the heat in association with another installation

F23G2206/201

with an industrial furnace

F23G2206/202

with an internal combustion engine

F23G2206/203

with a power/heat generating installation

F23G2207/00

Control

F23G2207/10

Arrangement of sensing devices

F23G2207/101

for temperature

F23G2207/1015

Heat pattern monitoring of flames

F23G2207/102

for pressure

F23G2207/103

for oxygen

F23G2207/104

for CO or CO₂

F23G2207/105

for NOx

F23G2207/106

for SOx

F23G2207/107

for halogen concentration

F23G2207/108

for hydrocarbon concentration

F23G2207/112

for waste supply flowrate

F23G2207/113

for oxidant supply flowrate

F23G2207/114

for combustion bed level

F23G2207/20

Waste supply

F23G2207/30

Oxidant supply

F23G2207/40

Supplementary heat supply

F23G2207/50

Cooling fluid supply

F23G2207/60

Additives supply

F23G2208/00

Safety aspects

F23G2208/10

Preventing or abating fire or explosion, e.g. by purging

F23G2209/00

Specific waste

F23G2209/10

Liquid waste

F23G2209/101

Waste liquor

F23G2209/102

Waste oil

F23G2209/103

Bagasse, megasse

F23G2209/12

Sludge, slurries or mixtures of liquids

F23G2209/14

Gaseous waste or fumes

F23G2209/141

Explosive gases

F23G2209/142

Halogen gases, e.g. silane

F23G2209/16

Warfare materials, e.g. ammunition

F23G2209/18

Radioactive materials

F23G2209/20

Medical materials

F23G2209/22

Waste papers

F23G2209/24

Contaminated soil

foundry sand

F23G2209/26

Biowaste

F23G2209/261

Woodwaste

F23G2209/262

Agricultural waste

F23G2209/28

Plastics or rubber like materials

F23G2209/281

Tyres

F23G2209/30

Solid combustion residues, e.g. bottom or flyash

F23G2900/00

Special features of, or arrangements for incinerators

F23G2900/00001

Exhaust gas recirculation using the heat thereof F23G2206/10

F23G2900/50001

Combination of two or more furnaces

F23G2900/50002

Burning with downwards directed draft through the waste mass

F23G2900/50003

Waste oxidation, pyrolysis or gasification in water under supercritical conditions

F23G2900/50004

Furnace with inclined hearth

F23G2900/50005

Waste in combustion chamber supported on bed made of special materials

F23G2900/50006

Combustion chamber walls reflecting radiant energy within the chamber

F23G2900/50007

Co-combustion of two or more kinds of waste, separately fed into the furnace

F23G2900/50008

Combustion of waste suspended or lifted by upward gas flows

F23G2900/50009

Furnace with progressive waste movements in vertical or steeply inclined direction

F23G2900/50201

Waste pyrolysis, gasification or cracking by indirect heat transfer

F23G2900/50202

Waste pyrolysis, gasification or cracking in presence of catalysts

F23G2900/50203

Waste pyrolysis, gasification or cracking in a mechanically fluidised bed, e.g. obtained by a centrifugal force

F23G2900/50204

Waste pre-treatment by pyrolysis, gasification or cracking

F23G2900/50205

Waste pre-treatment by pyrolysis, gasification or cracking followed by condensation of gas into combustible oil or fat

F23G2900/50206

Pelletising waste before combustion

F23G2900/50207

Thermoforming of plastic waste materials before combustion

F23G2900/50208

Biologic treatment before burning, e.g. biogas generation

F23G2900/50209

Compacting waste before burning

F23G2900/50211

Evaporating, e.g. liquid waste before burning

F23G2900/50212

Extruding waste before combustion

F23G2900/50213

Preheating processes other than drying or pyrolysis

F23G2900/50214

Separating non combustible matters

F23G2900/50401

Drying waste by mixing with drying chemicals, e.g. with CaO

F23G2900/508

Providing additional energy for combustion, e.g. by using supplementary heating

F23G2900/50801

using the heat from externally heated bodies, e.g. steel balls

F23G2900/50802

using solid propellant

F23G2900/50803

using solar energy

F23G2900/50804

using thermit or other compositions of metal oxides as auxiliary fuel

F23G2900/51001

using arc discharge electrodes to provide heat

F23G2900/52001

Rotary drums with co-current flows of waste and gas

F23G2900/52002

Rotary drum furnaces with counter-current flows of waste and gas

F23G2900/52003

Rotary drum furnaces with foramenous drum walls, e.g. grate drums

F23G2900/53801

Multi-hearth furnaces with vertical axis

F23G2900/54001

Hearths or supports movable into and from the furnace, e.g. by a conveyor

F23G2900/54401

Feeding waste in containers, bags or barrels

F23G2900/54402

Injecting fluid waste into incinerator

F23G2900/54601

using waste heat for desalinating sea water

F23G2900/55

Controlling

Monitoring or measuring

F23G2900/55001

Controlling combustion air preheating

F23G2900/55002

Sensing exhaust gas opacity

F23G2900/55003

Sensing for exhaust gas properties, e.g. O₂ content

F23G2900/55004

Sensing exhaust gas radioactivity

F23G2900/55005

Sensing ash or slag properties

F23G2900/55006

Measuring material flow rates

F23G2900/55007

Sensors arranged in waste loading zone, e.g. feed hopper level

F23G2900/55008

Measuring produced steam flow rate

F23G2900/55009

Controlling stoker grate speed or vibrations for waste movement

F23G2900/55011

Detecting the properties of waste to be incinerated, e.g. heating value, density

F23G2900/70

Incinerating particular products or waste

F23G2900/7001

Air bags or seat belt pre-tensioners

F23G2900/7002

Animal fat, e.g. lard, tallow, stearin

F23G2900/7003

Incinerating litter from animals, e.g. poultry litter

F23G2900/7004

Incinerating contaminated animal meals

F23G2900/7005

Incinerating used asbestos

F23G2900/7006

Incinerating used automobiles

F23G2900/7007

Incinerating or pyrolysing used batteries

F23G2900/7008

Incinerating remains of building materials after demolishing, e.g. fibreglass asphalt shingles

F23G2900/7009

Incinerating human or animal corpses or remains

F23G2900/7011

Incinerating PCB-materials

F23G2900/7012

Incinerating rice or grain husks, hulls or bran

F23G2900/7013

Incinerating oil shales

F23G2900/70401

Incinerating drainage water from waste pits of incinerators

F23G2900/70601

Temporary storage means, e.g. buffers for accumulating fumes or gases, between treatment stages