F23B1/00	7	{Combustion apparatus using only lump fuel}	F23B30/00	F23B1/00		375
F23B1/02	8	{for indirect heating of a medium in a vessel, e.g. for boiling water (steam generation F22)}	F23B30/00	F23B1/02		55
F23B1/04	9	{External furnaces, i.e. with furnace in front of the vessel}	F23B30/00	F23B1/04		5
F23B1/06	10	{for heating water-tube boilers, e.g. Tenbrink flue furnaces}	F23B30/00	F23B1/06		327
F23B1/08	9	{Internal furnaces, i.e. with furnaces inside the vessel}	F23B30/00	F23B1/08		32
F23B1/10	10	{for heating locomotive boilers}	F23B30/00	F23B1/10		11
F23B1/12	9	{with a plurality of combustion chambers}	F23B10/00	F23B1/12		8
F23B1/16	8	{the combustion apparatus being modified according to the form of grate or other fuel support (for incinerators F23G5/002)}	F23B30/00	F23B1/16		370
F23B1/165	9	{using roller grate}	F23B30/00	F23B1/16		15
F23B1/18	9	{using inclined grate}	F23B30/00	F23B1/18		63
F23B1/20	9	{using step-type grate}	F23B30/00	F23B1/20		28
F23B1/22	9	{using travelling grate}	F23B30/08	F23B1/22		97
F23B1/24	9	{using rotating grate}	F23B30/00	F23B1/24		149
F23B1/26	9	{using imperforate fuel supports}	F23B30/00	F23B1/26		29
F23B1/28	9	{using ridge-type grate, e.g. for combustion of peat, sawdust, or pulverulent fuel (combustion of peat, sawdust F23G7/10)}	F23B30/00	F23B1/28		44
F23B1/30	8	{characterised by the form of combustion chamber}	F23B30/00	F23B1/30		94
F23B1/32	9	{rotating}	F23B30/00	F23B1/32		55
F23B1/34	9	{annular}	F23B30/00	F23B1/34		29
F23B1/36	9	{shaft-type}	F23B50/00	F23B1/36		214
F23B1/38	9	{for combustion of peat, sawdust, or pulverulent fuel on a grate or other fuel support (combustion of peat, sawdust F23G7/10)}	F23B30/00	F23B1/38		151
F23B3/00	7	{Combustion apparatus which is portable or removable with respect to the boiler or other apparatus which is heated}	F23B20/00	F23B3/00		89
F23B5/00	7	{Combustion apparatus with arrangements for burning uncombusted material from primary combustion (combustion apparatus characterised by the combination of two or more combustion chambers F23C6/00; the primary combustion being pulverulent fuel F23C9/003)}	F23B30/00	F23B5/00		726
F23B5/02	8	{in main combustion chamber}	F23B30/00	F23B5/02		608
F23B5/025	9	{recirculating uncombusted solids to combustion chamber}	F23B30/00	F23B5/02		38
F23B5/04	8	{in separate combustion chamber; on separate grate}	F23B30/00	F23B5/04		263
F23B7/00	7	{Combustion techniques; Other solid-fuel combustion apparatus}	F23B30/00	F23B7/00		421
F23B7/002	8	{characterised by gas flow arrangements}	F23B30/00	F23B7/00		65
F23B7/005	9	{with downdraught through fuel bed and grate}	F23B30/00	F23B7/00		249
F23B7/007	9	{with fluegas recirculation to combustion chamber}	F23B30/00	F23B7/00		101
F23B10/00	7	Combustion apparatus characterised by the combination of two or more combustion chambers	F23B10/00	F23B10/00		688
F23B10/02	8	including separate secondary combustion chambers	F23B10/02	F23B10/02		392
F23B20/00	7	Combustion apparatus specially adapted for portability or transportability	F23B20/00	F23B20/00		201
F23B30/00	7	Combustion apparatus with driven means for agitating the burning fuel; Combustion apparatus with driven means for advancing the burning fuel through the combustion chamber	F23B30/00	F23B30/00		241
F23B30/02	8	with movable, e.g. vibratable, fuel-supporting surfaces; with fuel-supporting surfaces that have movable parts	F23B30/02	F23B30/02		339
F23B30/04	9	with fuel-supporting surfaces that are rotatable around a horizontal or inclined axis and support the fuel on their inside, e.g. cylindrical grates	F23B30/04	F23B30/04		128
F23B30/06	9	with fuel supporting surfaces that are specially adapted for advancing fuel through the combustion zone	F23B30/06	F23B30/06		77
F23B30/08	10	with fuel-supporting surfaces that move through the combustion zone, e.g. with chain grates	F23B30/08	F23B30/08		186
F23B30/10	10	with fuel-supporting surfaces having fuel advancing elements that are movable, but remain essentially in the same place, e.g. with rollers or reciprocating grate bars	F23B30/10	F23B30/10		81
F23B40/00	7	Combustion apparatus with driven means for feeding fuel into the combustion chamber	F23B40/00	F23B40/00		794
F23B40/02	8	the fuel being fed by scattering over the fuel-supporting surface	F23B40/02	F23B40/02		413
F23B40/04	8	the fuel being fed from below through an opening in the fuel-supporting surface	F23B40/04	F23B40/04		196
F23B40/06	8	the fuel being fed along the fuel-supporting surface	F23B40/06	F23B40/06		144
F23B40/08	9	into pot- or trough-shaped grates	F23B40/08	F23B40/08		123
F23B50/00	7	Combustion apparatus in which the fuel is fed into or through the combustion zone by gravity, e.g. from a fuel storage situated above the combustion zone	F23B50/00	F23B50/00		109
F23B50/02	8	the fuel forming a column, stack or thick layer with the combustion zone at its bottom	F23B50/02	F23B50/02		432
F23B50/04	9	the movement of combustion air and flue gases being substantially transverse to the movement of the fuel	F23B50/04	F23B50/04		263
F23B50/06	9	the flue gases being removed downwards through one or more openings in the fuel-supporting surface	F23B50/06	F23B50/06		127
F23B50/08	9	with fuel-deflecting bodies forming free combustion spaces inside the fuel layer	F23B50/08	F23B50/08		38
F23B50/10	9	with the combustion zone at the bottom of fuel-filled conduits ending at the surface of a fuel bed	F23B50/10	F23B50/10		119
F23B50/12	8	the fuel being fed to the combustion zone by free fall or by sliding along inclined surfaces, e.g. from a conveyor terminating above the fuel bed	F23B50/12	F23B50/12		515
F23B60/00	7	Combustion apparatus in which the fuel burns essentially without moving	F23B60/00	F23B60/00		797
F23B60/02	8	with combustion air supplied through a grate	F23B60/02	F23B60/02		943
F23B70/00	7	Combustion apparatus characterised by means returning solid combustion residues to the combustion chamber	F23B70/00	F23B70/00		85
F23B80/00	7	Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel	F23B80/00	F23B80/00		699
F23B80/02	8	by means for returning flue gases to the combustion chamber or to the combustion zone	F23B80/02	F23B80/02		372
F23B80/04	8	by means for guiding the flow of flue gases, e.g. baffles	F23B80/04	F23B80/04		813
F23B90/00	7	Combustion methods not related to a particular type of apparatus<br><br><u>NOTE</u><br><br>Groups F23B90/00 - F23B90/08 correspond to IPC2012.01	F23B90/00	F23B90/00		335
F23B90/02	8	Start-up techniques	F23B90/02	F23B90/02		167
F23B90/04	8	including secondary combustion (in separate combustion chambers F23B10/02)	F23B90/04	F23B90/04		398
F23B90/06	9	the primary combustion being a gasification or pyrolysis in a reductive atmosphere	F23B90/06	F23B90/06		909
F23B90/08	9	in the presence of catalytic material	F23B90/08	F23B90/08		54
F23B99/00	7	Subject matter not provided for in other groups of this subclass	F23B99/00	F23B99/00		87
F23B2101/00	7	Adaptation of combustion apparatus to boilers in which the combustion chamber is situated inside the boiler vessel, e.g. surrounded by cooled surfaces	F23B101/00	F23B101/00		151
F23B2103/00	7	Adaptation of combustion apparatus for placement in or against an opening of a boiler, e.g. for replacing an oil burner	F23B103/00	F23B103/00		38
F23B2103/02	8	for producing an essentially horizontal flame	F23B103/02	F23B103/02		32
F23B2700/00	7	Combustion apparatus for solid fuel	CPCONLY	F23B2700/00		4
F23B2700/003	8	adapted for use in water-tube boilers	CPCONLY	F23B2700/003		501
F23B2700/004	8	adapted for use in Tenbrink boilers	CPCONLY	F23B2700/004		2
F23B2700/005	8	adapted for use in locomotives	CPCONLY	F23B2700/005		63
F23B2700/006	8	Details of locomotive combustion apparatus	CPCONLY	F23B2700/006		112
F23B2700/007	8	with pressurised combustion chambers	CPCONLY	F23B2700/007		26
F23B2700/008	8	with interchangeable combustion chambers	CPCONLY	F23B2700/008		25
F23B2700/009	8	adapted for use in various steam boilers	CPCONLY	F23B2700/009		171
F23B2700/01	8	adapted for boilers built up from sections	CPCONLY	F23B2700/01		1016
F23B2700/011	8	with fuel shaft for steam boilers	CPCONLY	F23B2700/011		462
F23B2700/012	8	with predrying in fuel supply area	CPCONLY	F23B2700/012		207
F23B2700/013	8	for use in baking ovens or cooking vessels	CPCONLY	F23B2700/013		120
F23B2700/014	8	for use in reverberatory furnaces	CPCONLY	F23B2700/014		34
F23B2700/018	8	with fume afterburning by staged combustion	CPCONLY	F23B2700/018		200
F23B2700/022	8	with various types of fume afterburners	CPCONLY	F23B2700/022		251
F23B2700/023	8	with various arrangements not otherwise provided for	CPCONLY	F23B2700/023		292
F23B2700/037	8	Burners for solid or solidified fuel, e.g. metaldehyde blocks	CPCONLY	F23B2700/037		103
F23B2900/00	7	Special features of, or arrangements for combustion apparatus using solid fuels; Combustion processes therefor	CPCONLY	F23B2900/00		3
F23B2900/00001	8	Combustion chambers with integrated fuel hopper	CPCONLY	F23B2900/00001		46
F23B2900/00003	8	Combustion devices specially adapted for burning metal fuels, e.g. Al or Mg	CPCONLY	F23B2900/00003		53
F23B2900/00004	8	Means for generating pulsating combustion of solid fuel	CPCONLY	F23B2900/00004		10
F23B2900/00005	8	Means for applying acoustical energy to flame	CPCONLY	F23B2900/00005		5
F23B2900/00006	8	Means for applying electricity to flame, e.g. an electric field	CPCONLY	F23B2900/00006		21
F23B2900/99001	8	Retrofitting or converting solid fuel stoves to gas or liquid fuels	CPCONLY	F23B2900/99001		8
