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IPC 7
F23C-F23C10100

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


F 23COMBUSTION APPARATUS; COMBUSTION PROCESSES


F 23 CCOMBUSTION 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 



1/

00Combustion 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]

1/

02.lump or liquid fuel

1/

04.lump or gaseous fuel

1/

06.lump or pulverulent fuel

1/

08.liquid or gaseous fuel

1/

10.liquid or pulverulent fuel

1/

12.gaseous or pulverulent fuel


3/

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


5/

00Disposition 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]

5/

02.Structural details of mounting

5/

06..Provision for adjustment of burner position during operation

5/

08.Disposition of burners

5/

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

5/

24..to obtain a loop flame

5/

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

5/

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


6/

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

6/

02.in parallel arrangement  [3]

6/

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


7/

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

7/

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

7/

04..to obtain maximum heat transfer to wall of combustion chamber

7/

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

7/

08...indirectly by a secondary fluid other than the combustion products


9/

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

9/

06.for completing combustion  [3]

9/

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


10/

00Fluidised 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/

02.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/

04..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/

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

 

10/

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

 

10/

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

 

10/

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

 

10/

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

 

10/

16.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/

18.Details; Accessories [7]

 

10/

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

 

10/

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

 

10/

24..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/

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

 

10/

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

 

10/

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

 

10/

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

 


11/

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

11/

02(transferred to F23C 10/00)

11/

04.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:

00Combustion in entrained fluidised beds, i.e. fluidised beds which have no distinct upper surface [7]


  
 

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