IPC 6 English version F22B !A-F22B 21/40

F22-F22B02140

SECTION F– MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

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)

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

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)

by exploitation of the heat content of hot heat carriers

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

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

the heat carrier being steam

released from heat accumulators

produced by an indirect cyclic process

coming in direct contact with water in bulk or in sprays

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

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)

using heat evolved in a solution absorbing steam; Soda steam boilers

using combustion under pressure substantially exceeding atmospheric pressure

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

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

in boilers heated electrically

Electrode boilers

Other methods of steam generation

involving the use of working media other than water

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)

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

at critical or supercritical pressure values

Kinds of steam boilers

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

with auxiliary water tubes outside the boiler body

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

Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed inside one or more furnace tubes built-in in the boiler body

without auxiliary water tubes

with auxiliary water tubes

inside the furnace tube in transverse arrangement

inside the furnace tube in longitudinal arrangement

outside the boiler body

with auxiliary fire tubes; Arrangement of header boxes providing for return diversion of flue gas flow

with both auxiliary water tubes and auxiliary fire tubes

Component parts thereof; Accessories therefor, e.g. stay-bolt connections

Walling of flues; Flue-gas header boxes

Furnace tubes

Steam boilers of fire-tube type, i.e. the flue gas from a combustion chamber outside the boiler body flowing through tubes built-in in the boiler body

the boiler body being disposed upright, e.g. above the combustion chamber

the fire tubes being in upright arrangement

Arrangement of header boxes providing for return diversion of flue gas flow

the fire tubes being in horizontal arrangement

the boiler body being disposed substantially horizontally, e.g. at the side of the combustion chamber

the fire tubes being in substantially-horizontal arrangement

Arrangement of header boxes providing for return diversion of flue gas flow

the boiler body containing fire tubes disposed crosswise in inclined upward arrangement

Component parts thereof; Accessories therefor, e.g. stay-bolt connections

11/

Steam boilers of combined fire-tube type and water-tube type, i.e. steam boilers of fire-tube type having auxiliary water tubes

11/

the fire tubes being in upright arrangement

11/

the fire tubes being in horizontal arrangement

13/

Steam boilers of fire-box type, i.e. the combustion of fuel being performed in a chamber or fire-box with subsequent flue(s) or fire tube(s), both chamber or fire-box and flues or fire tubes being built-in in the boiler body

13/

mounted in fixed position with the boiler body disposed upright

13/

mounted in fixed position with the boiler body disposed substantially horizontally

13/

Locomobile, traction-engine, steam-roller, or locomotive boilers

13/

without auxiliary water tubes inside the fire-box

13/

with auxiliary water tubes inside the fire-box

13/

the auxiliary water tubes lining the fire-box

13/

Component parts thereof; Accessories therefor

13/

Stay-bolt connections, e.g. rigid connections

13/

Flexible connections, e.g. of ball-and-socket type

15/

Water-tube boilers of horizontal type, i.e. the water-tube sets being arranged horizontally

17/

Water-tube boilers of horizontally-inclined type, i.e. the water-tube sets being inclined slightly with respect to the horizontal plane

17/

built-up from water-tube sets in abutting connection with two header boxes in common for all sets, e.g. with flat header boxes

17/

the water-tube sets being inclined in opposite directions, e.g. crosswise

17/

the water-tube sets being bent angularly

17/

the water-tube sets being curved

17/

built-up from water-tube sets in abutting connection with two sectional headers each for every set, i.e. with headers in a number of sections across the width or height of the boiler

17/

the sectional headers being in vertical or substantially-vertical arrangement

17/

the sectional headers being in horizontal or substantially-horizontal arrangement

17/

Component parts thereof; Accessories therefor

17/

Header boxes; Sectional headers

19/

Water-tube boilers of combined horizontally-inclined type and vertical type, i.e. water-tube boilers of horizontally-inclined type having auxiliary water-tube sets in vertical or substantially-vertical arrangement

21/

Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically

21/

built-up from substantially-straight water tubes

21/

involving a single upper drum and a single lower drum, e.g. the drums being arranged transversely

21/

the water tubes being arranged annularly in sets, e.g. in abutting connection with drums of annular shape

21/

the water tubes being arranged sectionally in groups or in banks, e.g. bent over at their ends

21/

the water tubes being arranged in staggered rows

21/

involving two or more upper drums and two or more lower drums, e.g. with crosswise-arranged water-tube sets in abutting connection with drums

21/

involving a single upper drum and two or more lower drums

21/

the lower drums being interconnected by further water tubes

21/

involving two or more upper drums and a single lower drum

21/

involving sectional or subdivided headers in separate arrangement for each water-tube set

21/

built-up from water tubes of form other than straight or substantially straight

21/

bent in serpentine or sinuous form

21/

bent helically, i.e. coiled

21/

bent spirally

21/

bent in U-loop form

21/

disposed horizontally in abutting connection with upright headers or rising water mains

21/

built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers

21/

involving an upper drum or headers mounted at the top of the combustion chamber

21/

Component parts thereof, e.g. prefabricated panels

21/

built-up from water tubes arranged in a comparatively long vertical shaft, i.e. tower boilers

F22B 23/00 - F22B 37/78