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| Number | Title | Issue Date |
| 7331312 | Waste heat recovery apparatus and method for boiler system An apparatus and method for recovery of waste heat in a boiler system, wherein heat from the hot condensate water in the system, which otherwise would be lost through dissipation, is used for other applications. Particularly, the waste heat energy recovered in the f... | 02/19/2008 |
| 7194869 | Turbine exhaust water recovery system The exhaust gas of a turbine engine can include water vapor. Aspects of the invention relate to various systems for recovering water from the exhaust gas of a gas turbine engine. In one system, a portion of the exhaust gas can be routed to an absorption chiller. In ... | 03/27/2007 |
| 6237542 | Heat recovery boiler and hot banking releasing method thereof A heat recovery boiler has a casing, a superheater having a heat transfer pipe, an evaporator provided with a steam drum, and an economizer. The superheater, evaporator and economizer arranged in the casing along a flow of an exhaust gas from the combusti... | 05/29/2001 |
| 5878675 | Flue gas desulfurizer, boiler equipment and thermal electric power generation equipment A flue gas desulfurizer having an absorption tower for bringing untreated flue gas into gas-liquid contact with an absorbent slurry, wherein there is provided heat recovery means for recovering heat from the flue gas passing through the flue gas inlet sec... | 03/09/1999 |
| 5765509 | Combination plant with multi-pressure boiler A mixed-pressure waste-heat boiler (7) has a forced-flow steam generator, essentially composed of a low-pressure economizer (15), of a low-pressure drum (17) and of a low-pressure evaporator (16), and a once-through forced-flow steam generator, essentiall... | 06/16/1998 |
| 5687674 | Steam power plant for generating electric power A steam power plant for generating electric power has a fossil-fuelled boiler, a water-steam cycle for generating high-tension, superheated steam for a steam turbine, an economizer to transmit heat from flue gas to the feed-water, an air preheater to tran... | 11/18/1997 |
| 5293841 | Arrangement for utilizing the heat contained in the exhaust gas of a coal-fired boiler An arrangement for utilizing the heat contained in the exhaust gas from a coal-fired boiler for preheating feed water for the boiler and for preheating primary air. The arrangement includes a rotating heat transfer unit and lines for conducting exhaust ga... | 03/15/1994 |
| 4915062 | Once-through steam generator A once-through steam generator comprises an economizer, an evaporator and a superheater connected in series one below the other in a boiler pass, and are acted upon by a hot gas mass flow flowing in the opposite direction. In order to prevent thermal shoc... | 04/10/1990 |
| 4799461 | Waste heat recovery boiler A waste heat recovery boiler comprising heat exchange rate switching means for controlling the rate of heat exchange between an exhaust gas and feedwater in a heat exchanger by changing the state of the feedwater in accordance with the concentration of su... | 01/24/1989 |
| 4660511 | Flue gas heat recovery system A method and apparatus for recovery of heat from the flue gas of the combustion furnace of a steam boiler or power generation plant uses a heat pump heat extracted from a lower temperature point in the system to a higher temperature point in the system. T... | 04/28/1987 |
| 4643133 | Cluster boiler A cartridge boiler designed for use in multiples in a furnace, each cartridge boiler having a vertically oriented cylindrical drum top and bottom with hemispherical end caps, with a plurality of free-expansion boiler tubes having internal feed water suppl... | 02/17/1987 |
| 4617878 | Process and device for recovery of thermal energy in a steam generating system In a steam generating system, steam condensate extracted from steam used to reheat boiler water in heaters (H1, . . . , H4) is revaporized in the recuperators-vaporizers (RV1, . . . , RV3) by heat exchange contact with the flue gas from boiler (B). The st... | 10/21/1986 |
| 4530311 | Waste heat boiler construction The present invention relates to a waste heat boiler construction where the convection chamber (5) of the waste heat boiler is located on essentially lower level than the radiation chamber (2). In order to lower the end of the radiation chamber (2) gradua... | 07/23/1985 |
| 4501233 | Heat recovery steam generator Heat recovery boiler equipment comprising high and low pressure boiler drums and high and low pressure evaporators is disclosed. A recirculation pipeline system is also disclosed in which a control device is provided to control the flow rate of recirculat... | 02/26/1985 |
| 4491093 | Energy and water recovery from flue gases Energy and water are recovered from flue gases by cooling them to a temperature sufficiently below the acid dew point temperature by contact with an aqueous stream so as to recover the sensible heat and to reduce the water content of the flue gases by abo... | 01/01/1985 |
| 4489679 | Control system for economic operation of a steam generator A once-through steam generator has both radiant and convection sections. The flue gases discharged from the convection section are passed through a wet scrubber to remove both sulfur oxides (SOx) and particulate matter. The feedwater to the con... | 12/25/1984 |
| 4445461 | Waste heat recovery method and apparatus An apparatus and method are disclosed for the recovery of sensible heat from a hot tar-free gas produced in a coal gasification process and in combined-cycle power generation. The recovered heat is utilized to generate a flow of superheated steam which ma... | 05/01/1984 |
| 4403575 | Device for preventing flashing to steam in an economizer of a flow through steam generator Device for preventing flashing to steam in an economizer of a flow-through steam generator wherein the economizer has heating surfaces disposed downstream of an evaporator and superheater surfaces in direction of a flue-gas path, including at least one pa... | 09/13/1983 |
| 4318366 | Economizer A boiler economizer includes a first heat exchanger disposed in a boiler flue and a second heat exchanger which is external. Boiler feedwater is delivered in series to the first and second heat exchangers before passage to the boiler. A flow controller di... | 03/09/1982 |
