| IPC 7 English version |
| F23-F23B00700 |
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| SECTION F – MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING |
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| F 23 | COMBUSTION APPARATUS; COMBUSTION PROCESSES |
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| F 23 B | COMBUSTION APPARATUS USING ONLY SOLID FUEL (for lump and another kind of fuel simultaneously or alternatively F23C 1/00; fluidised bed combustion apparatus F23C 10/00; burning of low-grade fuel F23G; grates F23H; feeding solid fuel to combustion apparatus F23K; constructional details of combustion chambers not otherwise provided for F23M; domestic apparatus F24; central heating boilers F24D; package boilers F24H) |
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| Note |
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| This subclass covers only the combustion of lump fuel, or of pulverulent or granulated fuel if no use is made of its fluent nature. |
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| Subclass Index |
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| APPARATUS |
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| Structural features |
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| Portable or removable |
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| Arrangements for burning uncombusted material |
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| Other apparatus |
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| COMBUSTION TECHNIQUES |
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1/ | 00 | Combustion apparatus using only lump fuel |
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1/ | 02 | . | for indirect heating of a medium in a vessel, e.g. for boiling water (steam generation F22) |
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1/ | 04 | . | . | External furnaces, i.e. with furnace in front of the vessel |
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1/ | 06 | . | . | . | for heating water-tube boilers, e.g. Tenbrink flue furnaces |
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1/ | 08 | . | . | Internal furnaces, i.e. with furnaces inside the vessel |
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1/ | 10 | . | . | . | for heating locomotive boilers |
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1/ | 12 | . | . | with a plurality of combustion chambers |
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1/ | 14 | . | Combined gas-producer and boiler, e.g. returning gases to flame (destructive distillation C10B) |
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1/ | 16 | . | the combustion apparatus being modified according to the form of grate or other fuel support |
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1/ | 18 | . | . | using inclined grate |
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1/ | 20 | . | . | using step-type grate |
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1/ | 22 | . | . | using travelling grate |
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1/ | 24 | . | . | using rotating grate |
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1/ | 26 | . | . | using imperforate fuel supports |
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1/ | 28 | . | . | using ridge-type grate, e.g. for combustion of peat, sawdust, or pulverulent fuel |
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1/ | 30 | . | characterised by the form of combustion chamber |
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1/ | 32 | . | . | rotating |
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1/ | 34 | . | . | annular |
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1/ | 36 | . | . | shaft type |
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1/ | 38 | . | . | for combustion of peat, sawdust, or pulverulent fuel on a grate or other fuel support |
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3/ | 00 | Combustion apparatus which is portable or removable with respect to the boiler or other apparatus which is heated |
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5/ | 00 | Combustion apparatus with arrangements for burning uncombusted material from primary combustion (wherein the primary combustion may be of pulverulent fuel F23C 9/00) |
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5/ | 02 | . | in main combustion chamber |
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5/ | 04 | . | in separate combustion chamber; on separate grate |
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7/ | 00 | Combustion techniques; Other solid-fuel combustion apparatus |
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