| Patents for F22D 1 - Feed-water heaters, e.g. preheaters (2,641) |
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| 03/25/1992 | CN2099908U Coal-saving dust-removing recoverer |
| 03/18/1992 | CN2099248U Heat exchange soft water tank for boiler |
| 03/18/1992 | CN1015925B Inclined tube-type high-effective upright boiler with conical combustion chamber |
| 03/11/1992 | EP0473654A1 Universal liquids heat transfer economizer |
| 01/08/1992 | CN2092666U Reclaimer for afterheat of flue gas |
| 01/02/1992 | EP0463448A1 Method and apparatus for heating and multiple effect degasification of water |
| 01/01/1992 | CN2092024U Devices for deoxidising and saving coal |
| 12/11/1991 | EP0460252A1 Steam generator and heat removal process for a steam generator |
| 12/11/1991 | CN2090473U Composite phase-change heat-exchanger |
| 12/06/1991 | CA2043731A1 Steam generator and method for removal of heat from a steam generator |
| 11/06/1991 | EP0455330A2 Deaeration system for a boiler |
| 11/05/1991 | CA2040542A1 Deaerator tray for a steam boiler feedwater heater system |
| 09/11/1991 | CN2084559U Conbined oxygen removing device for low pressure boiler |
| 08/28/1991 | CN2083695U Flushing rotational flow dust removing type exhaust heat using device |
| 07/24/1991 | CN2081482U Heating power oxygen-deaerator |
| 07/24/1991 | CN2081316U Automatic temp.-adjusting electrolytic heat sucking-oxygen water supply device |
| 07/16/1991 | US5031355 Steam arrangement for exterminating the Argentina Fire Ant |
| 07/03/1991 | CN1052728A Efficient coal-saving unit |
| 05/29/1991 | CN2077951U Thermal de-aerator of feed water |
| 05/02/1991 | EP0424864A2 Power plant |
| 04/30/1991 | US5012429 Method and apparatus for optimization of feedwater heater liquid level |
| 04/23/1991 | CA1283332C Food processing water heater and steam generator |
| 04/04/1991 | WO1991004523A1 Steam/water mixer |
| 04/03/1991 | EP0419839A2 Deaerator heat exchanger for combined cycle power plant |
| 04/03/1991 | CN2074421U Water purifying plant for boiler |
| 03/27/1991 | CN2073977U Recovery device of waste heat for small size boiler |
| 03/06/1991 | CN2072643U Degassing aspirating boiler breeching preheater |
| 02/20/1991 | CN2071755U Multifunction water pot made use of waste heat of boiler |
| 01/30/1991 | CN2070400U Automatic control boiler drug oxygen remover |
| 01/23/1991 | CN2069965U Energy-saving thermal deoxidiser |
| 01/09/1991 | CN1048446A Thermal deoxidization technique for hot water boiler and the device thereof |
| 01/02/1991 | CN2068643U Steam boiler waste heat deoxidising apparatus |
| 01/02/1991 | CN1011062B Vacuum deoxygenation equipment and method |
| 01/01/1991 | US4981113 Deaerator tray for a steam boiler feedwater heater system |
| 12/19/1990 | CN2067787U Chemical oxygen remover for boiler |
| 12/11/1990 | US4976107 Procedure for improving the efficiency of a steam power plant process |
| 12/11/1990 | US4976100 System and method for heat recovery in a combined cycle power plant |
| 12/05/1990 | EP0400370A2 A method for heat recovery in a combined cycle power plant |
| 12/01/1990 | CA2017989A1 System and method for heat recovery in a combined cycle power plant |
| 11/28/1990 | CN1047377A Method to save energy and water for wine-making industry and its softened water cooler |
| 11/28/1990 | CN1047363A Improved reheater piping and drain cooler system |
| 11/27/1990 | WO1990014556A1 Universal liquids heat transfer economizer |
| 11/27/1990 | CA2060511A1 Universal liquids heat transfer economizer |
| 11/22/1990 | EP0398070A2 A combined cycle power plant |
| 11/21/1990 | CN1047134A Water ring oxygen removing vacuum pump and its oxygen removing method |
| 11/17/1990 | CA2016929A1 Reheater piping and drain cooler system |
| 11/15/1990 | CA2016697A1 Method and apparatus for operating a combined cycle power plant having a defective deaerator |
| 10/24/1990 | CN1046382A Vacuum-hydraulic deoxygenating device for pipeline |
| 10/09/1990 | US4961311 Deaerator heat exchanger for combined cycle power plant |
| 09/26/1990 | CN1009754B Steam generator feed water heater |
| 09/25/1990 | US4958679 Condenser for the water-steam loop of a power plant, in particular a nuclear power plant |
| 09/12/1990 | CN2062012U De-aeration device for rh model boiler water supply |
| 09/11/1990 | US4955200 For heat rate improvement in a steam turbine thermal cycle |
| 09/05/1990 | CN1009436B Dispensation formuld and production process of iron-grain deoxidizer and application |
| 08/22/1990 | CN2060844U High efficiency coal-saving device |
| 08/22/1990 | CN1009305B Atmospheric-type thermodynamic deoxidizing method without using water vapour |
| 06/14/1990 | WO1990006482A1 Heat exchanger |
| 05/09/1990 | CN2056958U Air-type lower vacuum oxygen remover |
| 05/02/1990 | CN2056744U Heat pipe heat exchanger for boiler |
| 04/18/1990 | CN1041439A Inclined tube-type high-effective upright boiler with conical combustion chamber |
| 04/17/1990 | CA1267819A1 System for recovering drain from feed-water heaters in a generating plant |
| 03/14/1990 | CN2054521U Heating superheated steam using device |
| 01/31/1990 | CN2052102U Boiler rapid heater |
| 01/30/1990 | US4896500 Method and apparatus for operating a combined cycle power plant having a defective deaerator |
| 11/29/1989 | EP0344094A1 Flash tank for hot fluids under pressure |
| 11/09/1989 | DE3814161A1 Vertical heat exchange apparatus for undercooling condensate and building up condensate |
| 11/07/1989 | US4878457 Zero flash closed condensate boiler feedwater system |
| 10/18/1989 | CN2046202U Coal-saving dust remover of boiler |
| 09/26/1989 | CA1260341A1 Process and device for recovery of thermal energy in a steam generating system |
| 09/13/1989 | CN2044320U Double fire grate back burning normal pressure tea boiler |
| 08/22/1989 | US4858564 Feedwater heater with improved steam distribution |
| 08/09/1989 | EP0327488A1 Condenser |
| 08/02/1989 | CN2042154U Wall-temp. controllable coal economizer |
| 07/19/1989 | CN2041415U 组合型热管换热器 Combined heat pipe heat exchanger |
| 06/27/1989 | US4841916 Evaporating apparatus with preheater |
| 06/27/1989 | US4841722 Dual fuel, pressure combined cycle |
| 06/21/1989 | CN2039794U Shaped-coal boiler for tea water |
| 06/14/1989 | CN2039383U Atmosphere-type thermodynamic oxygen remover |
| 06/06/1989 | CA1255169A1 Feed water preheater |
| 05/31/1989 | CN2038595U Low pressure high temp. steam boiler |
| 05/09/1989 | CA1253812A1 Efficient waste heat recovery process from sulfur containing flue gas |
| 05/03/1989 | CN2037027U Multilaminate reverse flow plate type boiler |
| 05/03/1989 | CN2036856U Active reaction, core-burning and heating type device for oxygen desorbing and removing |
| 04/11/1989 | US4819436 Deaerator pressure control system |
| 03/22/1989 | CN2034648U Energy-saving coal-saving device |
| 03/08/1989 | CN1031484A Dispensation formuld and production process of iron-grain deoxidizer |
| 02/15/1989 | CN1031128A Steam-less low-position low-temp. vacuum deoxygenation equipment |
| 01/31/1989 | US4801314 Deaerator for the feed water to a steam generator |
| 12/29/1988 | WO1988010359A1 Procedure for improving the efficiency of a steam power plant process |
| 12/13/1988 | CA1246407A1 Pre-heater |
| 11/29/1988 | CA1245422A1 Process for making phosphorus pentoxide and optionally phosphoric acid with utilization of the reaction heat |
| 10/05/1988 | EP0285124A1 Feed water deaerator for a steam generator |
| 09/14/1988 | CN87209492U 节能蒸汽锅炉 Saving steam boiler |
| 08/09/1988 | CA1240159A1 Process for purifying and deaerating the condensate/feed water in the circulation system of a power-generating plant |
| 07/26/1988 | US4759315 Deaerator tray for a steam boiler feedwater heater system |
| 07/13/1988 | CN87204358U Boiler flue preheater |
| 06/15/1988 | CN87211745U Catalyst reaction cryogenic desorption and oxygen removing system |
| 06/07/1988 | CA1237573A1 Combined sulphur burning furnace and boiler |
| 05/25/1988 | EP0161289B1 Process for the thermal treatment of liquids, respectively mixtures of liquids and solid materials for the concentration of liquid components and plant for implementing such process |
| 05/04/1988 | CN87213041U Chemical deoxidising device for 2-6.5 ton boiler |