IPC 7 English version F23C-F23C 101:00

F23C-F23C10100

SECTION F – MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

F 23

COMBUSTION APPARATUS; COMBUSTION PROCESSES

F 23 C

COMBUSTION APPARATUS USING FLUENT FUEL (combustion apparatus for solid fuel only F23B; burners F23D; constructional details of combustion chambers not otherwise provided for F23M; combustion chambers for generating combustion products of high pressure or high velocity F23R)

Subclass Index

APPARATUS

For burning two or more kinds of combustibles

F23C 1/00

Characterised by shape of combustion chamber; by two or more chambers

F23C 3/00; F23C 6/00

With recycling of combustion products

F23C 9/00

For fluidised bed combustion

F23C 10/00

Other apparatus

F23C 11/00

MOUNTING, DISPOSITION OF BURNERS

F23C 5/00

AIR-SUPPLY ARRANGEMENTS

F23C 7/00

Combustion apparatus for burning two or more kinds of fuel simultaneously or alternatively, at least one kind of fuel being fluent (F23C 10/00 takes precedence; with after-burning arrangements F23C 9/00; one kind being for ignition of the other F23Q) [1,7]

lump or liquid fuel

lump or gaseous fuel

lump or pulverulent fuel

liquid or gaseous fuel

liquid or pulverulent fuel

gaseous or pulverulent fuel

Combustion apparatus characterised by the shape of the combustion chamber (F23C 10/00 takes precedence) [1,7]

Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus (F23C 1/00, F23C 10/00, F23C 11/04 take precedence) [1,7]

Structural details of mounting

Provision for adjustment of burner position during operation

Disposition of burners

to obtain a single flame of concentrated or substantially planar form, e.g. pencil or sheet flame (F23C 5/32 takes precedence) [3]

to obtain a loop flame

to obtain flames in opposing directions, e.g. impacting flames

to obtain rotating flames, i.e. flames moving helically or spirally [3]

Combustion apparatus characterised by the combination of two or more combustion chambers (F23C 10/00 takes precedence) [3,7]

in parallel arrangement [3]

in series connection (consuming smoke or fumes in separate combustion apparatus F23G 7/06) [3]

Air-supply arrangements (F23C 10/00 takes precedence; in general F23L) [1,7]

Disposition of air supply not passing through burner (to obtain a cyclonic tapering flame when burning pulverulent fuel F23C 5/32)

to obtain maximum heat transfer to wall of combustion chamber

for heating the incoming air (arrangements of regenerators or recuperators F23L 15/00)

indirectly by a secondary fluid other than the combustion products

Combustion apparatus with arrangements for recycling or recirculating combustion products or flue gases (F23C 10/00 takes precedence) [1,7]

for completing combustion [3]

for reducing temperature in combustion chamber, e.g. for protecting walls of combustion chamber [3]

10/

Fluidised bed combustion apparatus [7]

Note

In this group, it is desirable to add the indexing code of group F23C 101:00. The indexing code should be unlinked. [7]

10/

with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed [7]

10/

the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone [7]

10/

the circulating movement being promoted by inducing differing degrees of fluidisation in different parts of the bed [7]

10/

characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases [7]

10/

the separation apparatus being located outside the combustion chamber [7]

10/

the particles being circulated exclusively within the combustion zone [7]

10/

the circulating movement being promoted by inducing differing degrees of fluidisation in different parts of the bed [7]

10/

specially adapted for operation at superatmospheric pressures, e.g. by the arrangement of the combustion chamber and its auxiliary systems inside a pressure vessel [7]

10/

Details; Accessories [7]

10/

Inlets for fluidisation air, e.g. grids; Bottoms [7]

10/

Fuel feeders specially adapted for fluidised bed combustion apparatus (F23C 10/26 takes precedence) [7]

10/

Devices for removal of material from the bed (devices for controlling the level of the bed or the amount of material in the bed F23C 10/30) [7]

10/

combined with devices for partial reintroduction of material into the bed, e.g. after separation of agglomerated parts [7]

10/

Control devices specially adapted for fluidised bed combustion apparatus [7]

10/

for controlling the level of the bed or the amount of material in the bed [7]

10/

by controlling the rate of recirculation of particles separated from the flue gases [7]

11/

Combustion apparatus using fluent fuel, not provided for in groups F23C 1/00 to F23C 10/00

11/

(transferred to F23C 10/00)

11/

Combustion apparatus for producing resonant combustion (for generating combustion products of high pressure or high velocity F23R) [3]

Indexing scheme associated with group F23C 10/00, relating to combustion in entrained fluidised beds. The indexing code should be unlinked. [7]

Note

Attention is drawn to Chapter IV of the Guide which sets forth the rules concerning the application and presentation of the different types of indexing code. [7]

101:

Combustion in entrained fluidised beds, i.e. fluidised beds which have no distinct upper surface [7]