(0)F23B:0/0:
IPC6
SECTION F - MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS;BLASTING
COMBUSTION APPARATUS USING ONLY SOLID FUEL
F23B
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F 23

 COMBUSTION APPARATUS; COMBUSTION PROCESSES
 

Note
 

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

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 "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 F 24 J;
 

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 "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;
 

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 "air" means a mixture of gases containing free oxygen and able to promote or support combustion.

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

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/ 02 • for indirect heating of a medium in a vessel, e.g. for boiling water (steam generation F 22)  

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/ 04 • • External furnaces, i.e. with furnace in front of the vessel  

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/ 06 • • • for heating water-tube boilers, e.g. Tenbrink flue furnaces  

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/ 08 • • Internal furnaces, i.e. with furnaces inside the vessel  

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/ 10 • • • for heating locomotive boilers  

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/ 12 • • with a plurality of combustion chambers  

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/ 14 • Combined gas-producer and boiler, e.g. returning gases to flame (destructive distillation C 10 B)  

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/ 16 • the combustion apparatus being modified according to the form of grate or other fuel support  

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/ 18 • • using inclined grate  

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/ 20 • • using step-type grate  

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/ 22 • • using travelling grate  

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/ 24 • • using rotating grate  

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/ 26 • • using imperforate fuel supports  

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/ 28 • • using ridge-type grate, e.g. for combustion of peat, sawdust, or pulverulent fuel  

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/ 30 • characterised by the form of combustion chamber  

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/ 32 • • rotating  

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/ 34 • • annular  

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/ 36 • • shaft type  

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/ 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