(0)F22B:0/3:
IPC6
SECTION F - MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS;BLASTING
METHODS OF STEAM GENERATION; STEAM BOILERS
F22B
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F 22

 STEAM GENERATION (chemical or physical apparatus for generating gases B 01 J; chemical generation of gas, e.g. under pressure, Section C; removal of combustion products or residues, e.g. cleaning of the combustion contaminated surfaces of tubes of boilers, F 23 J; generating combustion products of high pressure or high velocity F 23 R; water heaters not for steam generation F 24 H, F 28; cleaning of internal or external surfaces of heat-transfer conduits, e.g. water tubes of boilers, F 28 G )
 

Note
 

In this class, the following term is used with the meaning indicated:
 

-

 "steam" covers also other condensable vapours, e.g. mercury, diphenyl, diphenyl oxide.

F 22 B

 METHODS OF STEAM GENERATION; STEAM BOILERS (steam engine plants where engine aspects predominate F 01 K; domestic central-heating systems using steam F 24 D; heat exchange or heat transfer in general F 28; generation of vapour in the cores of nuclear reactors G 21)
 

Note
 

This subclass covers only methods of, or apparatus for, the generation of steam under pressure for heating or power purposes.

 

 

 

General aspects of, or methods for, steam generation
 

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/ 00 Methods of steam generation characterised by form of heating method (use of solar heat F 24 J 2/00; jackets or other cooling means in which steam is generated and which serve for cooling other apparatus, see the subclasses for such apparatus)

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/ 02 • by exploitation of the heat content of hot heat carriers  

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/ 04 • • the heat carrier being hot slag, hot residues, or heated blocks, e.g. iron blocks  

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/ 06 • • the heat carrier being molten; Use of molten metal, e.g. zinc, as heat transfer medium  

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/ 08 • • the heat carrier being steam  

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/ 10 • • • released from heat accumulators  

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/ 12 • • • produced by an indirect cyclic process  

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/ 14 • • • coming in direct contact with water in bulk or in sprays  

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/ 16 • • the heat carrier being hot liquid or hot vapour, e.g. waste liquid, waste vapour  

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/ 18 • • the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines (use of waste heat of combustion engines, in general, F 02)  

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/ 20 • using heat evolved in a solution absorbing steam; Soda steam boilers  

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/ 22 • using combustion under pressure substantially exceeding atmospheric pressure  

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/ 24 • • Pressure-fired steam boilers, e.g. using turbo air compressors actuated by hot gases from boiler furnace  

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/ 26 • • Steam boilers of submerged-flame type, i.e. the flame being surrounded by, or impinging on, the water to be vaporised  

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/ 28 • in boilers heated electrically  

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/ 30 • • Electrode boilers  
 

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/ 00 Other methods of steam generation

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/ 02 • involving the use of working media other than water  

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/ 04 • by drop in pressure of high-pressure hot water within pressure-reducing chambers, e.g. in accumulators (steam accumulators per se F 01 K 1/00)  

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/ 06 • by transformation of mechanical, e.g. kinetic, energy into heat energy  

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/ 08 • at critical or supercritical pressure values  

Kinds of steam boilers
 

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/ 00 Steam boilers of drum type, i.e. without internal furnace or fire tubes, the boiler body being contacted externally by flue gas

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/ 02 • with auxiliary water tubes outside the boiler body  

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/ 04 • Component parts thereof; Accessories therefor (covers or similar closure members for pressure vessels in general F 16 J 13/00)  
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