|  | 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 Fulltext... Hierarchy... Expanded...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.

|  | F23B |
COMBUSTION APPARATUS USING ONLY SOLID FUEL (for lump and another kind of fuel simultaneously or alternatively Fulltext... Hierarchy... Expanded...F23C 1/00; fluidised bed combustion apparatus Fulltext... Hierarchy... Expanded...F23C 10/00; burning of low-grade fuel Fulltext... Hierarchy... Expanded...F23G; grates Fulltext... Hierarchy... Expanded...F23H; feeding solid fuel to combustion apparatus Fulltext... Hierarchy... Expanded...F23K; constructional details of combustion chambers not otherwise provided for Fulltext... Hierarchy... Expanded...F23M; domestic apparatus Fulltext... Hierarchy... Expanded...F24; central heating boilers Fulltext... Hierarchy... Expanded...F24D; package boilers Fulltext... Hierarchy... Expanded...F24H)

|  | F23B |
Note(s) This subclass covers only the combustion of lump fuel, or of pulverulent or granulated fuel if no use is made of its fluent nature.

|  | F23B |
Subclass index
APPARATUS |
Structural features | 1/00
Portable or removable | 3/00
Arrangements for burning uncombusted material | 5/00
Other apparatus | 7/00
COMBUSTION TECHNIQUES | 7/00

|  | F23B 1/00 |
Combustion apparatus using only lump fuel

|  | F23B 1/02 |
· | for indirect heating of a medium in a vessel, e.g. for boiling water (steam generation Fulltext... Hierarchy... Expanded...F22)

|  | F23B 1/04 |
· · | External furnaces, i.e. with furnace in front of the vessel

|  | F23B 1/06 |
· · · | for heating water-tube boilers, e.g. Tenbrink flue furnaces

|  | F23B 1/08 |
· · | Internal furnaces, i.e. with furnaces inside the vessel

|  | F23B 1/10 |
· · · | for heating locomotive boilers

|  | F23B 1/12 |
· · | with a plurality of combustion chambers

|  | F23B 1/14 |
· | Combined gas-producer and boiler, e.g. returning gases to flame (destructive distillation Fulltext... Hierarchy... Expanded...C10B)

|  | F23B 1/16 |
· | the combustion apparatus being modified according to the form of grate or other fuel support

|  | F23B 1/18 |
· · | using inclined grate

|  | F23B 1/20 |
· · | using step-type grate

|  | F23B 1/22 |
· · | using travelling grate

|  | F23B 1/24 |
· · | using rotating grate

|  | F23B 1/26 |
· · | using imperforate fuel supports

|  | F23B 1/28 |
· · | using ridge-type grate, e.g. for combustion of peat, sawdust, or pulverulent fuel

|  | F23B 1/30 |
· | characterised by the form of combustion chamber

|  | F23B 1/32 |
· · | rotating

|  | F23B 1/34 |
· · | annular

|  | F23B 1/36 |
· · | shaft type

|  | F23B 1/38 |
· · | for combustion of peat, sawdust, or pulverulent fuel on a grate or other fuel support

|  | F23B 3/00 |
Combustion apparatus which is portable or removable with respect to the boiler or other apparatus which is heated

|  | F23B 5/00 |
Combustion apparatus with arrangements for burning uncombusted material from primary combustion (wherein the primary combustion may be of pulverulent fuel Fulltext... Hierarchy... Expanded...F23C 9/00)

|  | F23B 5/02 |
· | in main combustion chamber

|  | F23B 5/04 |
· | in separate combustion chamber; on separate grate

|  | F23B 7/00 |
Combustion techniques; Other solid-fuel combustion apparatus