| Patents for F22B 21 - Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically (973) |
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| 10/13/1999 | CN2343474Y Low-pressure high-temp energy-saving dedusting boiler |
| 09/28/1999 | CA2109456C Compact boiler having low nox emissions |
| 09/22/1999 | CN2339854Y Gas-combustion steam boiler |
| 09/22/1999 | CN2339853Y Needle-tube type steam-injection boiler energy-saving apparatus |
| 09/14/1999 | US5950574 Boiler |
| 09/08/1999 | CN2337399Y Energy-saving verticle fire-tube boiler |
| 08/25/1999 | EP0937218A1 Method applicable to a continuous steam generator, and the steam generator needed for applying same |
| 08/11/1999 | EP0935094A2 Process furnace |
| 06/16/1999 | CN2324405Y Safety, energy-saving multi-purpose vertical pipe column and vertical chamber industrial boiler |
| 06/09/1999 | EP0834039A4 Energy converter using imploding plasma vortex heating |
| 06/02/1999 | CN2322045Y Vertical internal combustion pipeless boiler |
| 05/19/1999 | CN2319693Y Normall pressure verticle square box-type hot water boiler |
| 05/06/1999 | WO1999022115A1 Method and apparatus for viscosity reduction of clogging hydrocarbons in oil well |
| 05/06/1999 | CA2307771A1 Method and apparatus for viscosity reduction of clogging hydrocarbons in oil well |
| 05/04/1999 | US5899072 Steam generator and steam turbine driving unit using gaseous hydrogen as fuel |
| 04/21/1999 | CN2315435Y Waste heat boiler for natural circulation producing acid by sulphur with horizontal full water pipe screw rib sheet |
| 04/20/1999 | US5894819 Water tube boiler and it's combustion method |
| 03/17/1999 | CN1211308A Boiler |
| 03/10/1999 | CN2310240Y Phase exchange heating boiler |
| 03/09/1999 | US5878699 Process furnace |
| 02/16/1999 | US5870976 Boiler with serpentine tubes |
| 02/03/1999 | CN1207069A Stainless steel sheet covered with alkali-soluble protective coat |
| 12/16/1998 | EP0884526A1 Boiler |
| 12/16/1998 | CN2300800Y Vertical steam boiler without butt joint welding seam |
| 12/08/1998 | US5845609 Fluid heater coils |
| 12/02/1998 | CN1041016C 流化床反应器系统 Fluidized bed reactor system |
| 11/25/1998 | CN2298424Y Semi-horizontal hot-water boiler |
| 11/11/1998 | EP0876568A1 Sleeved boiler-reactor |
| 11/04/1998 | EP0874965A1 Combustor means of a vapour generating and vapour superheating unit and a method of operating same |
| 11/04/1998 | CN2296448Y High efficiency nodel tube heat exchanging boiler |
| 10/22/1998 | WO1998046938A1 Modular boiler |
| 09/30/1998 | CN1194348A Pipe type boiler |
| 09/09/1998 | EP0862993A1 Stainless steel sheet covered with alkali-soluble protective coat |
| 08/26/1998 | CN1191596A Package boiler of unitary construction |
| 08/25/1998 | US5797259 Cooling air cooler for power plants |
| 08/25/1998 | CA2006576C Quadrangular type multi-tube once-through boiler |
| 08/11/1998 | US5791299 Small once-through boiler |
| 08/05/1998 | CN2287264Y Spring spiral boiler |
| 07/15/1998 | CN2286283Y Vertical three-drum two-return combustion coal water-tube boiler |
| 07/15/1998 | CN2286282Y Travelling grate stoker and pulverized-fuel complex combustion boiler |
| 06/25/1998 | WO1998027385A1 Boiler |
| 06/17/1998 | CN2284347Y Verticle dual-chamber fuel/gas boiler |
| 05/27/1998 | CN2282643Y 2 ton 1.0 Mpa vertical water tube double-layer fire grate boiler |
| 05/27/1998 | CN2282642Y Vertical fuel oil (gas) life steam boiler |
| 05/14/1998 | WO1998020280A1 Method applicable to a continuous steam generator, and the steam generator needed for applying same |
| 05/14/1998 | CA2270596A1 Method applicable to a continous steam generator, and the steam generator needed for applying same |
| 05/05/1998 | US5746159 Combustion device in tube nested boiler and its method of combustion |
| 04/30/1998 | WO1998017946A1 Solid fuel fired boiler plant and furnace unit and flue gas unit for use in such a boiler plant |
| 04/15/1998 | CN2278857Y Boiler |
| 04/08/1998 | EP0834039A1 Energy converter using imploding plasma vortex heating |
| 03/25/1998 | EP0830544A1 Package boiler of unitary construction |
| 03/25/1998 | EP0720714B1 Steam boiler of once-through type and process for operating the same |
| 03/25/1998 | CN2277030Y Verticle atmospheric pressure secondary heating boiler |
| 03/12/1998 | WO1998009809A1 Stainless steel sheet covered with alkali-soluble protective coat |
| 03/12/1998 | DE19645748C1 Steam generator operating method |
| 03/12/1998 | CA2236006A1 Alkali-soluble protective-film coated stainless steel sheet |
| 02/04/1998 | CN1037290C Combustion method and apparatus for reducing emission concentrations of Noxand co |
| 01/27/1998 | US5711257 Sleeved boiler-reactor |
| 01/15/1998 | WO1998001701A1 Combustor means of a vapour generating and vapour superheating unit and a method of operating same |
| 01/13/1998 | US5706766 Method of operating a once-through steam generator and a corresponding steam generator |
| 12/17/1997 | EP0812407A1 Process and system for starting a continuous steam generator |
| 12/11/1997 | WO1997046828A1 Boiler having a helical coil of spirally corrugated pipe |
| 11/12/1997 | CN1164889A Process and system for starting continuous steam generator |
| 10/15/1997 | CN2264845Y Miniature boiler |
| 10/08/1997 | CN2264298Y Hot air multifunctional boiler |
| 10/07/1997 | US5673654 Marine boiler |
| 08/13/1997 | CN2259553Y Inforced heat transfer smokeless coal-saving vertical boiler |
| 07/31/1997 | WO1997027425A1 Sleeved boiler-reactor |
| 07/30/1997 | EP0786624A2 Small once-through boiler |
| 07/02/1997 | CN1153550A Marine boiler |
| 06/17/1997 | US5638773 Method and apparatus for low NOX combustion of gaseous fuels |
| 06/04/1997 | EP0776412A1 Steam generator and steam turbine driving unit for the use of gaseous propellant, especially hydrogen |
| 05/21/1997 | EP0774629A2 Water tube boiler and its combustion method |
| 05/14/1997 | EP0773349A1 Cooling-air cooling unit for power plants |
| 04/16/1997 | EP0767885A1 Marine boiler |
| 04/09/1997 | CN1147081A Rappable steam generator tube bank |
| 04/03/1997 | WO1997009565A3 Process and system for starting a continuous steam generator |
| 03/26/1997 | CN2250473Y 立式水管烧油蒸汽锅炉 Vertical steam boiler burning oil pipes |
| 03/26/1997 | CN2250472Y Turning changeable shaped coal steam boiler |
| 03/13/1997 | WO1997009565A2 Process and system for starting a continuous steam generator |
| 02/25/1997 | CA2076591C Method and apparatus for low nox combustion of gaseous fuels |
| 12/18/1996 | CN2243021Y High-effecient heat-conductive multi-purpose boiler |
| 12/12/1996 | WO1996039594A1 Package boiler of unitary construction |
| 12/11/1996 | CN1137818A Steam generator and steam turbine driving unit for use gaseous propellant, especially hydrogen |
| 12/10/1996 | US5582137 Compact boiler having low NOX emissions |
| 11/20/1996 | CN2240668Y Heat pipe energy-saving vertical pressureless boiler |
| 10/09/1996 | CN2237175Y Large vertical heating boiler with split-flow water intake channels |
| 10/02/1996 | CN1132548A Process for operating a continuous steam generator and continuous steam generator thus operated |
| 09/10/1996 | US5553571 Rappable steam generator tube bank |
| 08/14/1996 | CN2233029Y Hot water boiler with vertical circular cavity and return fume duct |
| 07/10/1996 | EP0720714A1 Steam boiler of once-through type and process for operating the same |
| 06/12/1996 | EP0716282A1 Rappable steam generator tube bank |
| 06/08/1996 | CA2163172A1 Rappable steam generator tube bank |
| 05/15/1996 | CN2227263Y Natural circulating sulfuric acid gastube boiler with multi-fin pipe |
| 04/24/1996 | CN2225599Y High efficiency gas-burning waste heat boiler |
| 04/11/1996 | WO1996010716A1 Energy converter using imploding plasma vortex heating |
| 04/03/1996 | CN2223802Y Vertical hanging type oil-combustion boiler with plane interal combustion chamber |
| 03/21/1996 | DE19503506A1 Heat and=or liq. vol. utiliser from steam generator gas and liq. flows |
| 03/06/1996 | CN2221716Y Ring storage tube type water-tube steam boiler |
| 02/21/1996 | CN2220584Y Boiler |