EP0823542A1 - Verfahren zur Vermeidung von Korrosion an Heizflächen - Google Patents
Verfahren zur Vermeidung von Korrosion an Heizflächen Download PDFInfo
- Publication number
- EP0823542A1 EP0823542A1 EP97112457A EP97112457A EP0823542A1 EP 0823542 A1 EP0823542 A1 EP 0823542A1 EP 97112457 A EP97112457 A EP 97112457A EP 97112457 A EP97112457 A EP 97112457A EP 0823542 A1 EP0823542 A1 EP 0823542A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating
- combustion chamber
- fluidized bed
- heating surfaces
- working fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/103—Carbon dioxide
Definitions
- the invention relates to a method for avoiding corrosion on heating surfaces during heating of the working fluid used in the cycle of a thermal power plant, which has a low Has boiling point.
- the object of the invention is to develop a method for heating the working fluid, which in Cyclic process is used in a thermal power plant, but at high temperatures Corrosion occurring on the heating surfaces should be eliminated.
- the process is characterized in that the preheating of the working fluid, such as CO 2 , takes place in heating surfaces outside the combustion chamber of a fluidized bed system, that the heating to final temperature takes place in the heating surfaces of the combustion chamber of a fluidized bed system and that in the combustion chamber of the fluidized bed system that on the Heating surfaces forming deposits are abraded by the fluidized bed.
- the working fluid such as CO 2
- Circuits for low-boiling liquids are described on the basis of temperature-entropy diagrams from the literature, such as, for example, combustible fuel, Volume 21, No. 7, July 1969, pages 347 to 394. Based on the key data shown in the diagram, a system that works according to the Sulzer process (page 357) is to be used to describe the invention. This is shown schematically in the connected figure. Carbon dioxide CO 2 is used as the working fluid.
- CO 2 is in the area of the wet steam area and is completely liquefied in a condenser 11.
- a feed pump 9 increases the pressure to approximately 270 bar.
- Heat exchangers 7, 6 supply heat to the CO 2 , so that the point of the pseudo phase change (liquid-gaseous) is exceeded and the CO 2 is heated to approximately 310 ° C. In the heating surfaces 3, 2, heat is again transferred from the flue gas to the working fluid CO 2 and this is heated to approx. 550 ° C.
- the working fluid CO 2 is expanded from approximately 250 bar to 60 bar and cooled to below 400 ° C.
- the mechanical work released during the relaxation drives a current generator 5.
- the relaxed to 60 bar CO 2 transfers its heat via heat exchanger 6, 7 recuperative on the so-called feed-CO 2, and is thereby cooled to about 75 ° C.
- the CO 2 is cooled down to the dew line.
- a partial flow of the working fluid is branched off in accordance with the Sulzer process and compressed to 250 bar in a compressor or compressor 8 and fed to the feed CO 2 .
- the remaining CO 2 is liquefied in the condenser 11 and fed back to the feed pump 9, which closes the circuit.
- a conventional fluidized bed system represented here by the combustion chamber 1, the heating surfaces 2 designed as membrane walls and the convection heating surfaces 3, heat is supplied to the CO 2 circuit via the convection heat exchanger 3 located after the combustion chamber 1 and the flue gas emerging from the combustion chamber 1 of approx .870 ° C cooled to approx. 350 ° C.
- the working fluid CO 2 heated in the convection heating surfaces 3 to approx. 395 ° C. is heated to the final temperature of approx. 550 ° C. in the membrane walls 2 located in the combustion chamber 1 of the fluidized bed system.
- Exactly as much heat is removed from the combustion chamber 1 that the temperature of the combustion chamber 1 is set to the temperatures of such a furnace that are common today (850 ° C. to 900 ° C.).
- the flue gas emerging from the convection heating surfaces 3 of the fluidized bed system is transferred to a conventional air preheater 12 heats and heats the combustion air to approx. 290 ° C.
- the flue gas is cooled to the usual exhaust gas temperatures of approx. 150 ° C in dedusted from a filter 13 and passed into the atmosphere via a chimney 14.
- the main advantage of this invention lies in the switching of the heating surfaces.
- the heat supply to the gaseous CO 2 is initially carried out via convection heating surfaces 3 of the second train of the fluidized bed system.
- the pipe wall temperatures that occur are 410 ° C below the temperature where high-temperature corrosion occurs.
- the CO 2 is heated to the final temperature in the membrane walls 2 of the combustion chamber 1 of the fluidized bed system.
- the invention is not limited to carbon dioxide CO 2 as the working fluid; it can also be used with other low-boiling fluids such as sulfur dioxide SO 2 , ammonia NH 3 or sulfur hexafluoride SF 6 .
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Description
Claims (2)
- Verfahren zur Vermeidung von Korrosion an Heizflächen bei der Erhitzung des im Kreisprozeß einer Wärmekraftanlage eingesetzten Arbeitsfluids, welches einen niedrigen Siedepunkt besitzt, dadurch gekennzeichnet, daß die Vorerhitzung des Arbeitsfluids, wie zum Beispiel CO2, in Heizflächen außerhalb der Brennkammer einer Wirbelschichtanlage erfolgt, daß die Erhitzung auf Endtemperatur in den Heizflachen der Brennkammer einer Wirbelschichtanlage erfolgt und daß in der Brennkammer der Wirbelschichtanlage die auf den Heizflächen sich bildenden Beläge durch die Wirbelschicht abgescheuert werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Vorerhitzung des Arbeitsfluids in den Konvektionsheizflächen des zweiten Zuges der Wirbelschichtanlage und die Erhitzung des Arbeitsfluids auf Endtemperatur in den Membranwänden der Brennkammer der Wirbelschichtanlage erfolgt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT143396 | 1996-08-08 | ||
AT1433/96 | 1996-08-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0823542A1 true EP0823542A1 (de) | 1998-02-11 |
Family
ID=3513802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97112457A Withdrawn EP0823542A1 (de) | 1996-08-08 | 1997-07-21 | Verfahren zur Vermeidung von Korrosion an Heizflächen |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0823542A1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20110243A1 (it) * | 2011-02-18 | 2012-08-19 | Exergy Orc S R L | Impianto e processo co-generativo per la produzione di energia tramite ciclo rankine organico |
CN104196583A (zh) * | 2014-08-22 | 2014-12-10 | 苟仲武 | 一种新型利用涡流原理的蒸汽动力循环装置及工作方法 |
EP2840312A3 (de) * | 2010-01-28 | 2015-11-18 | Palmer Labs, LLC | System und Verfahren zur hocheffizienten Stromerzeugung mithilfe eines zirkulierenden Kohlenstoffdioxidarbeitsmediums |
AU2019203986B2 (en) * | 2013-03-15 | 2021-01-07 | 8 Rivers Capital, Llc | System and method for high efficiency power generation using a carbon dioxide circulating working fluid |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4498289A (en) * | 1982-12-27 | 1985-02-12 | Ian Osgerby | Carbon dioxide power cycle |
US4665864A (en) * | 1986-07-14 | 1987-05-19 | Foster Wheeler Energy Corporation | Steam generator and method of operating a steam generator utilizing separate fluid and combined gas flow circuits |
JPH08303213A (ja) * | 1995-05-06 | 1996-11-19 | Yoshihide Nakamura | 加圧ボイラーを用いる動力発生システム |
-
1997
- 1997-07-21 EP EP97112457A patent/EP0823542A1/de not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4498289A (en) * | 1982-12-27 | 1985-02-12 | Ian Osgerby | Carbon dioxide power cycle |
US4665864A (en) * | 1986-07-14 | 1987-05-19 | Foster Wheeler Energy Corporation | Steam generator and method of operating a steam generator utilizing separate fluid and combined gas flow circuits |
JPH08303213A (ja) * | 1995-05-06 | 1996-11-19 | Yoshihide Nakamura | 加圧ボイラーを用いる動力発生システム |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 097, no. 003 31 March 1997 (1997-03-31) * |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2840312A3 (de) * | 2010-01-28 | 2015-11-18 | Palmer Labs, LLC | System und Verfahren zur hocheffizienten Stromerzeugung mithilfe eines zirkulierenden Kohlenstoffdioxidarbeitsmediums |
CN105422198A (zh) * | 2010-01-28 | 2016-03-23 | 帕尔默实验室有限责任公司 | 利用二氧化碳循环工作流体高效发电的系统和方法 |
CN105422198B (zh) * | 2010-01-28 | 2018-06-26 | 八河流资产有限责任公司 | 利用二氧化碳循环工作流体高效发电的系统和方法 |
EP3789677A1 (de) * | 2010-01-28 | 2021-03-10 | 8 Rivers Capital, LLC | Verfahren zur hocheffizienten stromerzeugung mithilfe eines zirkulierenden kohlenstoffdioxidarbeitsmediums |
ITMI20110243A1 (it) * | 2011-02-18 | 2012-08-19 | Exergy Orc S R L | Impianto e processo co-generativo per la produzione di energia tramite ciclo rankine organico |
AU2019203986B2 (en) * | 2013-03-15 | 2021-01-07 | 8 Rivers Capital, Llc | System and method for high efficiency power generation using a carbon dioxide circulating working fluid |
AU2021202130B2 (en) * | 2013-03-15 | 2023-06-15 | 8 Rivers Capital, Llc | System and method for high efficiency power generation using a carbon dioxide circulating working fluid |
CN104196583A (zh) * | 2014-08-22 | 2014-12-10 | 苟仲武 | 一种新型利用涡流原理的蒸汽动力循环装置及工作方法 |
CN104196583B (zh) * | 2014-08-22 | 2016-04-06 | 苟仲武 | 一种利用涡流原理的蒸汽动力循环装置及工作方法 |
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