| Patents for F22B 9 - 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 (351) |
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| 12/29/2005 | US20050284421 Coal combusting boiler |
| 12/06/2005 | US6971336 Super low NOx, high efficiency, compact firetube boiler |
| 11/30/2005 | CN1702373A Energy-saving boiler |
| 11/18/2005 | CA2467550A1 Coal combusting boiler |
| 09/22/2005 | DE10252955B4 Dampferzeuger für die Wiedergewinnung von Abwärme aus vorgeschalteten Abgaserzeugern Steam generator for the recovery of waste heat from the exhaust gas upstream producers |
| 06/15/2005 | CN2704753Y Non-pressure effective steaming furances |
| 04/27/2005 | CN2695789Y Small vertical fire-tube boiler |
| 03/09/2005 | CN1590842A Environmental protection energy saving longitudinal type boiler |
| 09/08/2004 | CN1165706C Steam boiler and its assembling method |
| 07/28/2004 | CN2628871Y Coal combustion boiler with N-shape fire tube |
| 06/30/2004 | CN2622556Y Sectional boiler with fire tube for preparing acid by sulphur |
| 06/03/2004 | DE10252955A1 Waste heat boiler with pre-heating and evaporation sections, has directly-connected, horizontal configuration |
| 05/19/2004 | CN2616801Y Hydrogen-burning steam boiler |
| 03/03/2004 | CN1140716C Internal water container of environmental protection steaming cabinet |
| 08/27/2003 | CN1119555C Arrangement at inlet pipe to heat exchange unit in flue-gas tube |
| 07/08/2003 | US6588104 Process for assembling a steam generator |
| 05/28/2003 | CN2553242Y Fuel-Oil-fired and coal-fired dual-purpose steam boiler |
| 05/20/2003 | US6564756 Firetube boiler |
| 05/07/2003 | CN2549323Y Vacuum heater |
| 10/16/2002 | CN2516887Y Phase transformation heating furnace |
| 09/10/2002 | US6446877 Gas fired humidifier |
| 04/03/2002 | CN1082173C Flexibility structure method and flexibility boiler thereof |
| 03/20/2002 | CN2482629Y Natural gas vacuum Heating furnace |
| 01/16/2002 | CN2472064Y Vertical gas water boiler |
| 01/16/2002 | CN1331397A Internal water container of environmental protection type steaming cabinet |
| 10/31/2001 | CN1074113C Circulating double fluidized-bed boiler |
| 10/17/2001 | CN2454631Y Super-conductive heat-transfer type boiler |
| 10/10/2001 | CN1316614A Steam boiler and its assembling method |
| 10/04/2001 | DE10014758A1 Dampferzeuger und Montageverfahren für diesen Steam generator and method of assembly for this |
| 10/03/2001 | CN2451895Y Superconducting heat transfer vertical boiler |
| 09/27/2001 | US20010023665 Steam generator and process for assembling it |
| 09/26/2001 | EP1136754A2 Steam generator and method of assembling |
| 07/18/2001 | CN2439603Y Water inner line of environmental protection steaming cabinet |
| 07/18/2001 | CN2439602Y Coal stove for heating water and generating steam |
| 05/09/2001 | CN2429731Y Multifunctional automatic oil fuel boiler |
| 01/03/2001 | CN2413175Y Cyclone gas combustion chamber and fire-tube boiler with the same |
| 11/07/2000 | US6142218 Arrangement at the inlet pipe to the heat exchanger unit in a flue-gas tube |
| 10/25/2000 | CN2402913Y High-efficiency vertical smoke and fire tube fuel oil-(or gas-) fired steam boiler |
| 10/04/2000 | CN2399603Y Mini steam boiler |
| 09/06/2000 | CN2395141Y Atmospheric hot pipe over heat steam boiler |
| 09/06/2000 | CN2395140Y Shaped coal boiler |
| 07/12/2000 | CN2387388Y Non-pressure high temp steam boiler |
| 06/21/2000 | CN2384105Y Vertical single-layer grate secondary air-feeding coal-burning fire tube steam boiler |
| 06/14/2000 | CN2382953Y 蒸汽发生炉 Steam generating furnace |
| 06/14/2000 | CN2382952Y Vertical internal combustion wet back type fire-tube coal burning boiler |
| 05/31/2000 | CN2380798Y Fire-tube internal-circulation fluidized-bed water-fire tube type boiler |
| 05/31/2000 | CN2380797Y Environment-protective energy-saved stream boiler |
| 05/10/2000 | CN2377442Y Vertical low-pressure steam boiler |
| 04/05/2000 | CN2372553Y Miniature coal-fired low pressure steam stove |
| 03/22/2000 | EP0817942B1 Heat exchanger unit in a flue gas tube of a steam boiler |
| 01/26/2000 | CN2360720Y Non-pressure steam boiler |
| 11/17/1999 | CN1235256A High raised ball-shape steam boiler |
| 09/15/1999 | CN2338611Y Horizontal waste heat boiler of combined fire-tube and water-tube type with automatic circulation during prod. of acid using sulphur as raw material |
| 08/05/1999 | DE19804267A1 Large water boiler for creating steam and/or hot water |
| 08/04/1999 | CN2331841Y Residual-heat recovery device for residual oil catalytic cracking |
| 07/14/1999 | CN2328939Y Oil combustion (hot water) boiled water and low pressure steam boiler |
| 04/28/1999 | CN2316551Y Vertical fire tube boiler |
| 01/13/1999 | CN2304006Y Low-pressure high-temp. automatic energy-saving steam boiler |
| 12/30/1998 | CN2302394Y High-energy steam boiler |
| 12/30/1998 | CN2302393Y Atmospheric high-temperature steam boiler |
| 12/29/1998 | US5852990 Waste heat boiler |
| 12/16/1998 | CN2300799Y Demountable coal-saving boiler |
| 12/09/1998 | CN2299988Y High-speed efficient steam generator |
| 12/02/1998 | CN1200456A Flexibility structure method and flexibility boiler thereof |
| 10/28/1998 | CN2295910Y Counter-compustion industrial boiler with dual-layer body |
| 10/14/1998 | CN2294382Y Double fire, high efficiency and environmental protection novel boiler |
| 10/07/1998 | CN2293715Y Full burned blast-furnace gas high temperature & high voltage power station boiler |
| 07/29/1998 | CN2286824Y High-efficiency horizontal boiler |
| 07/29/1998 | CN1188871A Circulating double fluidized-bed boiler |
| 07/15/1998 | CN2286279Y Horizontal oil or gas combustion dry-back eccentric corrugated tube three return thread flue tube boiler |
| 04/22/1998 | CN1179821A Arrangement at inlet pipe to heat exchange unit in flue-gas tube |
| 01/14/1998 | EP0817942A1 An arrangement at the inlet pipe to the heat exchanger unit in a flue-gas tube |
| 09/17/1997 | CN2262649Y Continuous high-efficient energy-saving coal-burning boiler |
| 07/31/1997 | WO1997027427A1 An arrangement at the inlet pipe to the heat exchanger unit in a flue-gas tube |
| 04/30/1997 | CN2253425Y Boiler |
| 01/15/1997 | CN2245161Y Multipurpose energy-saving domestic fire-tube type non-pollution boiler |
| 01/31/1996 | CN2218875Y Atmospheric vertical hot tube boiler |
| 01/24/1996 | CN2218302Y Self cleaning and high performance heating pipe |
| 01/17/1996 | CN2217724Y Vertical fuel-oil gas boiler for both heating and water-supplying systems |
| 01/03/1996 | EP0690262A1 Waste heat boiler |
| 12/06/1995 | CN2214599Y Furnace body of horizontal internally reversing boiler |
| 12/06/1995 | CN2214598Y vertical tubes 3-reture verticle boiler |
| 11/01/1995 | CN2211539Y Vertical back-flame boiler body |
| 10/11/1995 | CN2209761Y Offset chamber boiler casting type boiler |
| 08/01/1995 | US5437248 Fire tube boiler |
| 05/17/1995 | CN2197569Y Boiler with a floating center tube and using waste heat |
| 05/03/1995 | CN2196234Y Boiler |
| 12/14/1994 | CN1096356A Brick kiln type steam boiler |
| 11/09/1994 | CN2182328Y Corrugated plate heat-transfer structure for convective chimney neck of boiler |
| 02/02/1994 | CN2154957Y Brickkiln type steam boiler |
| 01/24/1994 | CA2101047A1 Fire tube boiler |
| 01/05/1994 | CN2152144Y Inclined heat tube waste heat furnace |
| 12/22/1993 | CN2150450Y Simi-size vertical type gas-coal steam boiler |
| 10/03/1993 | CA2064967A1 Heating boiler |
| 08/11/1993 | CN2140018Y Fork type heating pipe boiler |
| 07/21/1993 | CN2138745Y Vertical shaped coal living boiler |
| 07/14/1993 | CN2138244Y Domestic boiler |
| 06/09/1993 | CN1021123C Hanging bladder energy-saving water furnace |
| 05/26/1993 | CN2134589Y Pot casting horizontal boiler for refrain pipe plate damage |
| 05/05/1993 | CN2132079Y Energy-saving combined steam boiler |