IPC 6 English version  F23-F23B00700
SECTION F– MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

F 23

COMBUSTION APPARATUS; COMBUSTION PROCESSES

F 23 B

COMBUSTION APPARATUS USING ONLY SOLID FUEL (for lump and another kind of fuel simultaneously or alternatively F 23 C 1/00; combustion in fluidised beds F 23 C 11/02; burning of low-grade fuel F 23 G; grates F 23 H; feeding solid fuel to combustion apparatus F 23 K; constructional details of combustion chambers not otherwise provided for F 23 M; domestic apparatus F 24; central heating boilers F 24 D; package boilers F 24 H)

Note

This subclass covers only the combustion of lump fuel, or of pulverulent or granulated fuel if no use is made of its fluent nature.

1/

00

Combustion apparatus using only lump fuel

1/

02

. 

for indirect heating of a medium in a vessel, e.g. for boiling water (steam generation F 22)

1/

04

. . 

External furnaces, i.e. with furnace in front of the vessel

1/

06

. . . 

for heating water-tube boilers, e.g. Tenbrink flue furnaces

1/

08

. . 

Internal furnaces, i.e. with furnaces inside the vessel

1/

10

. . . 

for heating locomotive boilers

1/

12

. . 

with a plurality of combustion chambers

1/

14

. 

Combined gas-producer and boiler, e.g. returning gases to flame (destructive distillation C 10 B)

1/

16

. 

the combustion apparatus being modified according to the form of grate or other fuel support

1/

18

. . 

using inclined grate

1/

20

. . 

using step-type grate

1/

22

. . 

using travelling grate

1/

24

. . 

using rotating grate

1/

26

. . 

using imperforate fuel supports

1/

28

. . 

using ridge-type grate, e.g. for combustion of peat, sawdust, or pulverulent fuel

1/

30

. 

characterised by the form of combustion chamber

1/

32

. . 

rotating

1/

34

. . 

annular

1/

36

. . 

shaft type

1/

38

. . 

for combustion of peat, sawdust, or pulverulent fuel on a grate or other fuel support

3/

00

Combustion apparatus which is portable or removable with respect to the boiler or other apparatus which is heated

5/

00

Combustion apparatus with arrangements for burning uncombusted material from primary combustion (wherein the primary combustion may be of pulverulent fuel F 23 C 9/00)

5/

02

. 

in main combustion chamber

5/

04

. 

in separate combustion chamber; on separate grate

7/

00

Combustion techniques; Other solid-fuel combustion apparatus
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