F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
 F01 - 
F04
Subsection index
MACHINES
positive displacement
rotary or oscillating piston
liquid and elastic fluid or elastic fluidF01C
liquid onlyF04C
reciprocating piston or other
liquid and elastic fluid or elastic fluidF01B
liquid onlyF04B
non-positive displacement
liquid and elastic fluid or elastic fluidF01D
liquid onlyF03B
ENGINES
positive displacement
rotary or oscillating piston
liquid and elastic fluid or elastic fluidF01C
liquid onlyF03C
reciprocating piston or other
liquid and elastic fluid or elastic fluidF01B
liquid onlyF03C
non-positive displacement
liquid and elastic fluid or elastic fluidF01D
liquid onlyF03B
PUMPS
positive displacement
rotary or oscillating pistonF04C
reciprocating piston or otherF04B
non-positive displacementF04D
  
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
METHODS OR APPARATUS FOR COMBUSTION USING FLUENT FUEL (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

Note(s)

In this subclass, methods are classified in the groups that cover the apparatus used. [8]

 F23C
Subclass index
COMBUSTION APPARATUS SPECIALLY ADAPTED FOR COMBUSTION OF TWO OR MORE TYPES OF FUEL 1/00
COMBINATIONS OF TWO OR MORE COMBUSTION CHAMBERS 6/00
FUNCTIONAL TYPES OF COMBUSTION APPARATUS
Fluidised bed combustion 10/00
Catalytic combustion 13/00
Resonant combustion 15/00
COMBUSTION APPARATUS CHARACTERISED BY SUBSYSTEMS
Combustion chambers 3/00
Arrangement or mounting of burners 5/00
Air supply 7/00
Arrangements for returning flue gases or combustion products 9/00
SUBJECT MATTER NOT PROVIDED FOR IN OTHER GROUPS OF THIS SUBCLASS 99/00
P:10 F23C 1/00
Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being fluent (combustion apparatus characterised by the combination of two or more combustion chambers F23C 6/00; pilot flame igniters F23Q 9/00)  [1,7,8]
 F23C 1/02
·  lump and liquid fuel
 F23C 1/04
·  lump and gaseous fuel
 F23C 1/06
·  lump and pulverulent fuel
 F23C 1/08
·  liquid and gaseous fuel
 F23C 1/10
·  liquid and pulverulent fuel
 F23C 1/12
·  gaseous and pulverulent fuel
P:50 F23C 3/00
Combustion apparatus characterised by the shape of the combustion chamber (F23C 15/00 takes precedence)  [1,7,8]
P:70 F23C 5/00
Combustion apparatus characterised by the arrangement or mounting of burners  [1,7,8]
 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]
P:0 F23C 6/00
Combustion apparatus characterised by the combination of two or more combustion chambers  [3,7,8]
 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]
P:80 F23C 7/00
Combustion apparatus characterised by arrangements for air supply (inlets for fluidisation air F23C 10/20)  [1,7,8]
 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
P:60 F23C 9/00
Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber (fluidised bed combustion apparatus with means for recirculation of particles entrained from the bed F23C 10/02; fluidised bed combustion apparatus with devices for removal and partial reintroduction of material from the bed F23C 10/26)  [1,7,8]
 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]
P:30 F23C 10/00
Apparatus in which combustion takes place in a fluidised bed of fuel or other particles  [7]
 F23C 10/00

Note(s)

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

 F23C 10/01
·  in a fluidised bed of catalytic particles  [8]
 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]
P:40 F23C 13/00
Apparatus in which combustion takes place in the presence of catalytic material (in a fluidised bed of catalytic particles F23C 10/01; radiant gas burners using catalysis for flameless combustion F23D 14/18)  [8]
 F23C 13/02
·  characterised by arrangements for starting the operation, e.g. for heating the catalytic material to operating temperature  [8]
 F23C 13/04
·  characterised by the arrangement of two or more catalytic elements in series connection  [8]
 F23C 13/06
·  in which non-catalytic combustion takes place in addition to catalytic combustion, e.g. downstream of a catalytic element  [8]
 F23C 13/08
·  characterised by the catalytic material  [8]
P:20 F23C 15/00
Apparatus in which combustion takes place in pulses influenced by acoustic resonance in a gas mass  [8]
P:90 F23C 99/00
Subject matter not provided for in other groups of this subclass  [8]
 F23C 101/00
Indexing scheme associated with group F23C 10/00, relating to combustion in entrained fluidised beds.  [7]
P:100 F23C 101/00
Combustion in entrained fluidised beds, i.e. fluidised beds which have no distinct upper surface  [7]