F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  
LIGHTING; HEATING
 F23
COMBUSTION APPARATUS; COMBUSTION PROCESSES
 F23

Note(s)

In this class, the following terms or expressions are used with the meanings indicated:

  • "combustion" means the direct combination of oxygen gas, e.g. in air, and a burnable substance. Any other heat-producing combination of chemical substances, e.g. hydrogen peroxide and methane, iron oxide and aluminium, is covered by section C or by subclass F24J;
  • "combustion chamber" means a chamber in which fuel is burned to establish a self-supporting fire or flame and which surrounds that fire or flame;
  • "burner" means a device by which fluent fuel is passed to a combustion space where it burns to produce a self-supporting flame;
  • "air" means a mixture of gases containing free oxygen and able to promote or support combustion.

 F23C
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)
 F23C
Subclass index
APPARATUS
For burning two or more kinds of combustibles 1/00
Characterised by shape of combustion chamber; by two or more chambers 3/00; 6/00
With recycling of combustion products 9/00
For fluidised bed combustion 10/00
Other apparatus 11/00
MOUNTING, DISPOSITION OF BURNERS 5/00
AIR-SUPPLY ARRANGEMENTS 7/00
 F23C 1/00
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]
 F23C 1/02
·  lump or liquid fuel
 F23C 1/04
·  lump or gaseous fuel
 F23C 1/06
·  lump or pulverulent fuel
 F23C 1/08
·  liquid or gaseous fuel
 F23C 1/10
·  liquid or pulverulent fuel
 F23C 1/12
·  gaseous or pulverulent fuel
 F23C 3/00
Combustion apparatus characterised by the shape of the combustion chamber (F23C 10/00 takes precedence)  [1,7]
 F23C 5/00
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]
 F23C 5/02
·  Structural details of mounting
 F23C 5/06
·  ·  Provision for adjustment of burner position during operation
 F23C 5/08
·  Disposition of burners
 F23C 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]
 F23C 5/24
·  ·  to obtain a loop flame
 F23C 5/28
·  ·  to obtain flames in opposing directions, e.g. impacting flames
 F23C 5/32
·  ·  to obtain rotating flames, i.e. flames moving helically or spirally  [3]
 F23C 6/00
Combustion apparatus characterised by the combination of two or more combustion chambers (F23C 10/00 takes precedence)  [3,7]
 F23C 6/02
·  in parallel arrangement  [3]
 F23C 6/04
·  in series connection (consuming smoke or fumes in separate combustion apparatus F23G 7/06)  [3]
 F23C 7/00
Air-supply arrangements (F23C 10/00 takes precedence; in general F23L)  [1,7]
 F23C 7/02
·  Disposition of air supply not passing through burner (to obtain a cyclonic tapering flame when burning pulverulent fuel F23C 5/32)
 F23C 7/04
·  ·  to obtain maximum heat transfer to wall of combustion chamber
 F23C 7/06
·  ·  for heating the incoming air (arrangements of regenerators or recuperators F23L 15/00)
 F23C 7/08
·  ·  ·  indirectly by a secondary fluid other than the combustion products
 F23C 9/00
Combustion apparatus with arrangements for recycling or recirculating combustion products or flue gases (F23C 10/00 takes precedence)  [1,7]
 F23C 9/06
·  for completing combustion  [3]
 F23C 9/08
·  for reducing temperature in combustion chamber, e.g. for protecting walls of combustion chamber  [3]
 F23C 10/00
Fluidised bed combustion apparatus  [7]
 F23C 10/00

Note(s)

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

 F23C 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]
 F23C 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]
 F23C 10/06
·  ·  ·  the circulating movement being promoted by inducing differing degrees of fluidisation in different parts of the bed  [7]
 F23C 10/08
·  ·  ·  characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases  [7]
 F23C 10/10
·  ·  ·  ·  the separation apparatus being located outside the combustion chamber  [7]
 F23C 10/12
·  ·  the particles being circulated exclusively within the combustion zone  [7]
 F23C 10/14
·  ·  ·  the circulating movement being promoted by inducing differing degrees of fluidisation in different parts of the bed  [7]
 F23C 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]
 F23C 10/18
·  Details; Accessories  [7]
 F23C 10/20
·  ·  Inlets for fluidisation air, e.g. grids; Bottoms  [7]
 F23C 10/22
·  ·  Fuel feeders specially adapted for fluidised bed combustion apparatus (F23C 10/26 takes precedence)  [7]
 F23C 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]
 F23C 10/26
·  ·  ·  combined with devices for partial reintroduction of material into the bed, e.g. after separation of agglomerated parts  [7]
 F23C 10/28
·  ·  Control devices specially adapted for fluidised bed combustion apparatus  [7]
 F23C 10/30
·  ·  ·  for controlling the level of the bed or the amount of material in the bed  [7]
 F23C 10/32
·  ·  ·  ·  by controlling the rate of recirculation of particles separated from the flue gases  [7]
 F23C 11/00
Combustion apparatus using fluent fuel, not provided for in groups F23C 1/00-F23C 10/00
 F23C 11/02
( transferred to F23C 10/00 )
 F23C 11/04
·  Combustion apparatus for producing resonant combustion (for generating combustion products of high pressure or high velocity F23R)  [3]
 F23C 101/00
Indexing scheme associated with group F23C 10/00, relating to combustion in entrained fluidised beds. The indexing code should be unlinked.  [7]
 F23C 101/00 - 
F23C 101/00

Note(s)

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]

 F23C 101/00
Combustion in entrained fluidised beds, i.e. fluidised beds which have no distinct upper surface  [7]