WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

F22G　SUPERHEATING OF STEAM (steam separating arrangements in boilers F22B 37/26)

F22G 1/00 Steam superheating characterised by heating method (exothermal chemical reactions not involving a supply of free oxygen gas, apparatus or devices for using the heat therefrom F24J)

F22G 1/005 ・{the heat being supplied by steam}

F22G 1/02 ・with heat supply by hot flue gases from the furnace of the steam boiler

F22G 1/04 ・・by diverting flow or hot flue gases to separate superheaters operating in reheating cycle, e.g. for reheating steam between a high-pressure turbine stage and an intermediate turbine stage

F22G 1/06 ・with heat supply predominantly by radiation

F22G 1/08 ・・from heated brickwork or the like

F22G 1/10 ・with provision for superheating by throttling

F22G 1/12 ・by mixing steam with furnace gases or other combustion products

F22G 1/14 ・using heat generated by chemical reactions

F22G 1/16 ・by using a separate heat source independent from heat supply of the steam boiler, e.g. by electricity, by auxiliary combustion of fuel oil

F22G 1/165 ・・{by electricity (steam generation in boilers heated electrically, in general, F22B 1/28)}

F22G 3/00 Steam superheaters characterised by constructional features; Details of component parts thereof (general aspects of enclosed heat-exchangers F28D)

F22G 3/001 ・{Steam tube arrangements not dependent of location (characterised by location F22G 7/00)}

F22G 3/002 ・・{with helical steam tubes}

F22G 3/003 ・{Superheater drain arrangements}

F22G 3/004 ・{Steam tubes with steam flowing in opposite directions in one pipe, e.g. Field tubes (F22G 3/005 takes precedence)}

F22G 3/005 ・{Annular steam tubes, i.e. the steam being heated between concentric tubes with the heating fluid flowing in inner and around outer tube}

F22G 3/006 ・{Steam superheaters with heating tubes (F22G 3/005 takes precedence)}

F22G 3/007 ・{Headers; Collectors, e.g. for mixing}

F22G 3/008 ・{Protection of superheater elements, e.g. cooling superheater tubes during starting-up periods, water tube screens}

F22G 3/009 ・{Connecting or sealing of superheater or reheater tubes with collectors or distributors}

F22G 5/00 Controlling superheat temperature (control systems for steam boilers F22B; regulating or controlling in general G05)

F22G 5/02 ・Applications of combustion-control devices, e.g. tangetial-firing burners, tilting burners

F22G 5/04 ・by regulating flue gas flow, e.g. by proportioning or diverting

F22G 5/06 ・by recirculating flue gases

F22G 5/08 ・・preventing furnace gas backflow through recirculating fan

F22G 5/10 ・by displacing superheater sections

F22G 5/12 ・by attemperating the superheated steam, e.g. by injected water sprays (spray mixers B01F 5/18)

F22G 5/123 ・・{Water injection apparatus}

F22G 5/126 ・・・{in combination with steam-pressure reducing valves}

F22G 5/14 ・・by live steam

F22G 5/16 ・by indirectly cooling or heating the superheated steam in auxiliary enclosed heat-exchanger

F22G 5/18 ・by by-passing steam around superheater sections

F22G 5/20 ・by combined controlling procedures

F22G 7/00 Steam superheaters characterised by location, arrangement, or disposition

F22G 7/005 ・{for locomotive boilers (F22G 7/065, F22G 7/105 take precedence)}

F22G 7/02 ・in fire tubes

F22G 7/04 ・in jackets around fire tubes

F22G 7/06 ・in furnace tubes

F22G 7/065 ・・{for locomotive boilers}

F22G 7/08 ・in fire-boxes

F22G 7/10 ・in smoke-boxes

F22G 7/105 ・・{for locomotive boilers}

F22G 7/12 ・in flues

F22G 7/14 ・in water-tube boilers, e.g. between banks of water tubes

F22G 7/145 ・・{of inclined type, i.e. the water-tube sets being inclined with respect to the horizontal plane}