EP0224050A1 - Coal-fired steam generator for a combined coal power plant - Google Patents

Coal-fired steam generator for a combined coal power plant Download PDF

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EP0224050A1
EP0224050A1 EP86114857A EP86114857A EP0224050A1 EP 0224050 A1 EP0224050 A1 EP 0224050A1 EP 86114857 A EP86114857 A EP 86114857A EP 86114857 A EP86114857 A EP 86114857A EP 0224050 A1 EP0224050 A1 EP 0224050A1
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Prior art keywords
flue gas
steam
steam generator
water
flue
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EP86114857A
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German (de)
French (fr)
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EP0224050B1 (en
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Wulf Dr.-Ing. Rettemeier
Horst Dipl.-Ing. Müller
Bernd Dipl.-Ing. Sudau
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Hitachi Zosen Inova Steinmueller GmbH
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L&C Steinmueller GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
    • F22B33/18—Combinations of steam boilers with other apparatus

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  • the invention relates to a coal-fired steam generator with a water-steam circuit and a low-pressure heat transfer circuit, which couples heat from the flue gas flow with at least one heating surface via a heater arranged in the flue gas flow of the steam generator and integrates it into a heat-consuming process, in particular coal Combination block with a steam turbine switched on in the water-steam cycle and a gas turbine process
  • low-pressure heat transfer medium is understood to mean a heat transfer medium which, in contrast to steam, can be used for heat transfer at lower pressures.
  • this includes helium and metals, such as sodium, as well as oils and salts, which are liquid at low pressures up to very high temperatures and can therefore be pumped.
  • the flue gas flow is divided into at least two flue gas flues connected in parallel to the combustion chamber, one of which is assigned to the water-steam cycle and the other to the low-pressure heat transfer medium cycle.
  • sodium is mentioned as the low-pressure heat transfer medium, which can preferably be used.
  • other metals such as potassium, or alloys, such as sodium-potassium alloys, may also be used (see Figure 7 of the cited publication) or gases such as helium, as well as oils and salts.
  • the sodium heater is not located directly above the burners, so that sodium cannot enter the combustion chamber if there is a sodium leak. Furthermore, there is no radiation into the heating surfaces of the heater when it is at a standstill.
  • the separability of the sodium train is ensured, so that the steam generator can continue to operate safely without heat being extracted via the sodium circuit.
  • the Water-steam train arranged heating surfaces largely separated from the sodium heating surfaces. In the case of a vertically arranged sodium train, the overall upward flow of sodium in the heater allows natural circulation and thus emergency cooling in the event of failure of the pump capacity arranged in the sodium circuit.
  • the flue gas flues are preferably arranged next to one another, again preferably in a horizontal or vertical arrangement. Because of the vertical orientation of the firebox, the vertical arrangement will be particularly useful.
  • the flue gas partial stream emerging from the low-pressure heat carrier flue gas flue is preferably fed into the water-steam flue at a point at which the temperature of the flue gas flue supplied essentially corresponds to the temperature of the flue gas flowing in the water-steam flue gas flue.
  • This guidance of the flue gas from one flue gas flue into the other is particularly advantageous, since the flue gas in the sodium flue cannot be cooled down to the same extent as in the water-steam flue (for example, the entry temperature of the flue gas into the sodium flue 1,150 ° C - outlet temperature the sodium draft 480 ° C at an inlet temperature of sodium of 380 ° C and an outlet temperature of 950 ° C / inlet temperature of the flue gas into the water-steam flue gas flue: 1,180 ° - outlet temperature 190 ° C).
  • the formation of the heater according to claim 4 allows adaptation of the heat applied to the individual heating surfaces z. B. the materials used for this.
  • the sodium flue gas train is preferably designed as a control train so that the extraction of heat can be controlled via the sodium circuit.
  • control room of the steam generator and the two flue gas flues are arranged in a row such that the water-steam flue gas flue is arranged between the combustion chamber and the low-pressure heat transfer flue gas flue.
  • the sodium flue gas flue is accessible from at least three sides, so that in the event of sodium leakage, damage is easier to correct.
  • the steam generator 1 consists of a combustion chamber 2 and two flue gas flues 3 and 4 connected in parallel. A large number of burners 2a fired with coal are assigned to the combustion chamber 2.
  • the flue gas duct 3 lying between the combustion chamber 2 and the external flue gas duct 4 is assigned to the water-steam circuit of the steam generator and has a multiplicity of heating surfaces 3a which are acted upon by water or steam. Except for point A, the flue gas flue is essentially evenly covered with heating surfaces 3a.
  • the flue gas flue 4 on the outside is integrated in a sodium circuit, for example in the sodium circuits according to Figure 10 or 11 of the above-mentioned literature reference.
  • a component of the sodium circuit is a heater which, in the embodiment shown, consists of a plurality of heating surfaces 4a arranged one above the other, which are connected in series.
  • the sodium in the heating surfaces 4a connected in series rises from the bottom to the top
  • the partial smoke flow associated with the flue gas flow flows in countercurrent from the top to the bottom.
  • the flue gas emerging from the flue gas duct 4 below is fed to the flue gas duct 3 at point A via a flue gas duct 7, since the outlet temperature of the flue gas from the flue gas duct 4 essentially corresponds to the temperature prevailing at point A.
  • One or more control flaps 8 are arranged in the one or more flue gas ducts 7 in order to regulate the quantity of flue gas entering the flue gas duct 4 and thus the heat to be coupled out via the sodium circuit.
  • inlet 5 and outlet 6 there can preferably be a connection line which can be switched on and off and which can be switched on in the event of failure of the circulation pump or pumps present in sodium circulation to enable natural circulation and emergency cooling. It is also possible for the pumps to be assigned corresponding bypass lines.
  • the heating surfaces 3a and 4a are preferably on the same levels, so that the same platforms and possibly the same auxiliary devices can be assigned to them.
  • the heater is preferably constructed from a multiplicity of heating surfaces 4a which are connected in series with respect to the low-pressure heat transfer medium circuit and are arranged in cocurrent or countercurrent with respect to the flue gas stream.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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Abstract

Bei einem kohlegefeuerten Dampferzeuger mit einem Wasser-Dampf- kreislauf und einem Niederdruck-Wärmeträ­ger-Kreislauf, der über einen im Rauchgasstrom des Dampferzeugers angeordneten Erhitzer mit mindestens einer Heizfläche Wärme aus dem Rauchgasstrom auskoppelt und in einen Wärme verbrauchenden Prozeß einbindet, insbesondere Kohle-Kombiblock mit einer in den Wasser-Dampfkreislauf eingeschalteten Dampfturbine und einen Gasturbinenprozeß, ist zur Optimierung der Lage des Erhitzers für den Niederdruck-Wärmeträger-­Kreislauf, insbesondere Natrium-Kreislauf, erfindungs­gemäß vorgesehen, daß der Rauchgasstrom auf mindestens zwei dem Feuerraum (2) parallel nachgeschaltete Rauchgaszüge (3, 4) aufgeteilt wird, von denen der eine (4) dem Wasser-Dampf-Kreislauf und der andere dem Niederdruck-Wärmeträger-Kreislauf zugeordnet ist.

Figure imgaf001
In the case of a coal-fired steam generator with a water-steam circuit and a low-pressure heat transfer medium circuit which, via a heater arranged in the flue gas flow of the steam generator, decouples heat from the flue gas flow with at least one heating surface and integrates it into a heat-consuming process, in particular a coal combination block A steam turbine connected to the water-steam circuit and a gas turbine process are provided according to the invention in order to optimize the position of the heater for the low-pressure heat transfer medium circuit, in particular the sodium circuit, in such a way that the flue gas flow on at least two flue gas flues connected in parallel to the combustion chamber (2) ( 3, 4) is divided, of which one (4) is assigned to the water-steam cycle and the other to the low-pressure heat transfer circuit.
Figure imgaf001

Description

Die erfindung betrifft einen kohlegefeuerten Dampferzeu­ger mit einem Wasser-Dampf-Kreislauf und einem Nieder­druck-Wärmeträger-Kreislauf, der über einen im Rauch­gasstrom des Dampferzeugers angeordneten Erhitzer mit mindestens einer Heizfläche Wärme aus dem Rauchgasstrom auskoppelt und in einen Wärme verbrauchenden Prozeß einbindet, insbesondere Kohle-Kombiblock mit einer in den Wasser-Dampfkreislauf eingeschalteten Dampfturbine und einen GasturbinenprozeßThe invention relates to a coal-fired steam generator with a water-steam circuit and a low-pressure heat transfer circuit, which couples heat from the flue gas flow with at least one heating surface via a heater arranged in the flue gas flow of the steam generator and integrates it into a heat-consuming process, in particular coal Combination block with a steam turbine switched on in the water-steam cycle and a gas turbine process

In der Beschreibung und in den Ansprüchen wird unter "Niederdruck-Wärmeträger" ein Wärmeträger verstanden der im Gegensatz zu Dampf bei geringeren Drücken zum Wärmetransport eingesetzt werden kann. Hierzu gehören in an sich bekannter Weise Helium und Metalle, wie Natrium sowie Öle und Salze, die bei geringen Drücken bis zu sehr hohen Temperaturen flüssig sind und somit mittels Pumpen gefördert werden können.In the description and in the claims, "low-pressure heat transfer medium" is understood to mean a heat transfer medium which, in contrast to steam, can be used for heat transfer at lower pressures. In a manner known per se, this includes helium and metals, such as sodium, as well as oils and salts, which are liquid at low pressures up to very high temperatures and can therefore be pumped.

Aus VGB Kraftwerkstechnik, 65. Jahrg., Heft 6 (1985), Seiten 545-557, insbesondere Bilder 10 und 11 auf S. 550, sind solche Dampferzeuger bekannt, bei denen der Niederdruck-Wärmeträger-Kreislauf ein Natrium-Kreislauf ist. Da die Wärme für den Natrium-Kreislauf in der Feuerung des im Kombi-Prozeß der Gasturbine nachgeschal­teten Dampferzeugers entbunden wird, besteht die Mög­lichkeit, den Natrium-Dampferhitzer im Dampferzeuger so unterzubringen, daß er an einer für ihn vorteilhaften Stelle liegt, während die von der Verbrennung her hoch belasteten Heizflächen des Dampferzeugers nach wie vor wassergekühlt sind. Auf diese Weise wird die Beanspruchung der für den Bau des Natrium-Erhitzers erforderlichen hochlegierten Werkstoffe vermindert.From VGB Kraftwerkstechnik, 65th year, volume 6 (1985), pages 545-557, especially images 10 and 11 on page 550, such steam generators are known in which the low-pressure heat transfer medium circuit is a sodium circuit. Since the heat for the sodium circuit is released in the furnace of the steam generator connected downstream in the combined process of the gas turbine, there is the possibility of the sodium steam heater in the steam generator to accommodate that it is located in an advantageous position for him, while the heating surfaces of the steam generator, which are highly stressed by the combustion, are still water-cooled. In this way, the stress on the high-alloy materials required for the construction of the sodium heater is reduced.

Es ist die Aufgabe der vorliegenden Erfindung, eine besonders vorteilhafte Stelle für die Anordnung des Niederdruck-Wärmetauschers angzugeben.It is the object of the present invention to provide a particularly advantageous location for the arrangement of the low-pressure heat exchanger.

Diese Aufgabe wird dadurch gelöst, daß der Rauchgasstrom auf mindestens zwei dem Feueraum parallel nachgeschaltete Rauchgaszüge aufgeteilt wird, von denen der eine dem Wasser-Dampf-Kreislauf und der andere dem Niederdruck-Wärmeträger-Kreislauf zugeordnet ist.This object is achieved in that the flue gas flow is divided into at least two flue gas flues connected in parallel to the combustion chamber, one of which is assigned to the water-steam cycle and the other to the low-pressure heat transfer medium cycle.

Im folgenden wird als Niederdruck-Wärmeträger Natrium angesprochen, das vorzugsweise eingesetzt werden kann. Unter Umständen kommen auch andere Metalle, wie Kalium, oder auch Legierungen, wie Natrium-Kaliumlegieren, infrage (vgl. Bild 7 der angezogenen Druckschrift) oder Gase wie Helium sowie Öle und Salze.In the following, sodium is mentioned as the low-pressure heat transfer medium, which can preferably be used. Under certain circumstances, other metals, such as potassium, or alloys, such as sodium-potassium alloys, may also be used (see Figure 7 of the cited publication) or gases such as helium, as well as oils and salts.

Die erfindungsgemäße Ausbildung des Dampferzeugers bietet mit getrennten Rauchgaszügen folgende Vorteile:The design of the steam generator according to the invention offers the following advantages with separate flue gas flues:

Der Natriumerhitzer ist nicht direkt über den Brennern angeordnet, so daß bei einem Natriumleck kein Natrium in die Brennkammer eintreten kann. Weiterhin erfolgt bei Stillstand keine Einstrahlung in die Heizflächen des Erhitzers.The sodium heater is not located directly above the burners, so that sodium cannot enter the combustion chamber if there is a sodium leak. Furthermore, there is no radiation into the heating surfaces of the heater when it is at a standstill.

Weiterhin ist die Abtrennbarkeit des Natriumzuges gewährleistet, so daß ein sicherer Weiterbetrieb des Dampferzeugers ohne Wärmeauskopplung über den Natrium-Kreislauf erfolgen kann. Weiterhin sind die im Wasser-Dampf-Zug angeordneten Heizflächen weitgehend von den Natrium-Heizflächen getrennt. Bei vertikal angeord­netem Natriumzug läßt die sich insgesamt einstellende Aufwärtsströmung des Natriums im Erhitzer einen Natur­umlauf und somit eine Notkühlung beim Ausfall der im Natrium-Kreislauf angeordneten Pumpkapazität zu.Furthermore, the separability of the sodium train is ensured, so that the steam generator can continue to operate safely without heat being extracted via the sodium circuit. Furthermore, the Water-steam train arranged heating surfaces largely separated from the sodium heating surfaces. In the case of a vertically arranged sodium train, the overall upward flow of sodium in the heater allows natural circulation and thus emergency cooling in the event of failure of the pump capacity arranged in the sodium circuit.

Vorzugsweise sind die Rauchgaszüge nebeneinander ange­ordnet, wiederum bevorzugt in horizontaler oder vertika­ler Anordnung. Wegen der vertikalen Ausrichtung des Feuerraums wird die vertikale Anordnung besonders zweck­mäßig sein.The flue gas flues are preferably arranged next to one another, again preferably in a horizontal or vertical arrangement. Because of the vertical orientation of the firebox, the vertical arrangement will be particularly useful.

Vorzugsweise wird der aus dem Niederdruck-Wärmeträger-­Rauchgaszug austretende Rauchgasteilstrom in den Wasser-Dampf-Zug an einer Stelle zugeführt, an der die Temperatur des zugeführten Rauchgasteilstroms im wesent­lichen der Temperatur des im Wasser-Dampf-Rauchgaszug strömenden Rauchgases entspricht. Diese Führung des Rauchgases aus dem einen Rauchgaszug in den anderen ist besonders vorteilhaft, da das Rauchgas in dem Natrium-­Zug nicht in gleichem Maße heruntergekühlt werden kann wie in dem Wasser-Dampfzug (beispielsweise Eintritts­temperatur des Rauchgases in den Natriumzug 1.150° C - Austrittstemperatur aus dem Natriumzug 480° C bei einer Eintrittstemperatur des Natriums von 380° C und einer Austrittstemperatur von 950° C/ Eintrittstemperatur des Rauchgases in den Wasser-Dampf-Rauchgaszug: 1.180° - Austrittstemperatur 190° C).The flue gas partial stream emerging from the low-pressure heat carrier flue gas flue is preferably fed into the water-steam flue at a point at which the temperature of the flue gas flue supplied essentially corresponds to the temperature of the flue gas flowing in the water-steam flue gas flue. This guidance of the flue gas from one flue gas flue into the other is particularly advantageous, since the flue gas in the sodium flue cannot be cooled down to the same extent as in the water-steam flue (for example, the entry temperature of the flue gas into the sodium flue 1,150 ° C - outlet temperature the sodium draft 480 ° C at an inlet temperature of sodium of 380 ° C and an outlet temperature of 950 ° C / inlet temperature of the flue gas into the water-steam flue gas flue: 1,180 ° - outlet temperature 190 ° C).

Die Ausbildung des Erhitzers gemäß Anspruch 4 ermöglicht eine Anpassung der Wärmebeaufschlagung der einzelnen Heizflächen z. B. an die hierfür verwendeten Werkstoffe.The formation of the heater according to claim 4 allows adaptation of the heat applied to the individual heating surfaces z. B. the materials used for this.

Der Natrium-Rauchgaszug ist vorzugsweise als Regelzug ausgebildet, damit die Auskopplung von Wärme über den Natrium-Kreislauf geregelt werden kann.The sodium flue gas train is preferably designed as a control train so that the extraction of heat can be controlled via the sodium circuit.

Es ist auch zweckmäßig, daß der Reuerraum des Dampfer­zeugers und die beiden Rauchgaszüge in einer Reihe angeordnet sind derart, daß der Wasser-Dampf-Rauchgaszug zwischen dem Feuerraum und dem Niederdruck-Wärmeträger-­Rauchgaszug angeordnet ist. Auf diese Weise ist der Natrium-Rauchgaszug mindestens von drei Seiten zugäng­lich, so daß im Falle von Natriumleckagen eine leichtere Schadensbehebung gegeben ist.It is also appropriate that the control room of the steam generator and the two flue gas flues are arranged in a row such that the water-steam flue gas flue is arranged between the combustion chamber and the low-pressure heat transfer flue gas flue. In this way, the sodium flue gas flue is accessible from at least three sides, so that in the event of sodium leakage, damage is easier to correct.

Wegen des üblicherweise zwischen dem aufsteigenden Feuerraum und dem absteigenden Rauchgaszug vorhandenen Freiraumes ist es zweckmäßig, in diesem Falle eine Leitung für die Überführung des Rauchgases aus dem Niederdruck-Wärmeträger-Zug in den Wasser-Dampf-Zug in diesem Freiraum nach oben an die Stelle zu führen, an der in etwa Temperaturgleichheit gegeben ist.Because of the free space usually present between the ascending combustion chamber and the descending flue gas flue, it is expedient in this case to lead a line for the transfer of the flue gas from the low-pressure heat transfer train to the water / steam train in this free space lead at which there is approximately equal temperature.

Der erfindungsgemäße Dampferzeuger 1 besteht aus einem Feuerraum 2 und zwei parallel geschalteten Rauchgaszügen 3 und 4. Dam Feuerraum 2 ist eine Vielzahl von mit Kohle gefeuerten Brennern 2a zugeordnet.The steam generator 1 according to the invention consists of a combustion chamber 2 and two flue gas flues 3 and 4 connected in parallel. A large number of burners 2a fired with coal are assigned to the combustion chamber 2.

Der zwischen dem Feuerraum 2 und dem außenliegenden Rauchgaszug 4 liegende Rauchgaszug 3 ist dem Wasser-­Dampf-Kreislauf des Dampferzeugers zugeordnet und weist eine Vielzahl von mit Wasser bzw. Dampf beaufschlagten Heizflächen 3a auf. Der Rauchgaszug ist bis auf die Stelle A im wesentlichen gleichmäßig mit Heizflächen 3a belegt. Der außenliegende Rauchgaszug 4 ist in einen Natrium-Kreislauf eingebunden, beispielsweise in die Natrium-Kreisläufe gemäß Bild 10 oder 11 der vorstehend genanten Literaturstelle. Bestandteil des Natrium-­Kreislaufs ist ein Erhitzer, der bei der gezeigten Ausführungsform aus einer Vielzahl von übereinander angeordneten Heizflächen 4a besteht, die hintereinander geschaltet sind. Von unten tritt in den Erhitzer über eine oder mehrere Einlaßleitungen 5 relativ kaltes Natrium ein und wird nach Erhitzung über eine oder mehrere Auslaßleitungen 6 abgeführt. Während also das Natrium in den hintereinander geschalteten Heizflä­chen 4a von unten nach oben aufsteigt, strömt der dem Rauchgaszug zugeordnete Rauchgasteilstrom im Gegen­strom von oben nach unten. Das aus dem Rauchgaszug 4 unten austretende Rauchgas wird über einen Rauchgas­kanal 7 dem Rauchgaszug 3 an der Stelle A zugeführt, da die Austrittstemperatur des Rauchgases aus dem Rauch­gaszug 4 im wesentlichen der an der Stelle A herrschen­den Temperatur entspricht. In dem oder den Rauchgaska­nälen 7 ist eine oder mehrere Regelklappen 8 angeordnet, um die in den Rauchgaskanal 4 eintretende Rauchgasmenge und damit die über den Natrium-Kreislauf auszukoppelnde Wärme zu regeln. Zwischen Einlaß 5 und Auslaß 6 kann vorzugsweise eine zu- und abschaltbare Verbindungslei­tung liegen, die bei Ausfall der im Natrium-Kreilauf vorhandenen Umwälzpumpe oder -pumpen zugeschaltet werden kann, um einen Naturumlauf und eine Notkühlung zu ermöglichen. Es ist auch möglich, daß den Pumpen entsprechende Bypassleitungen zugeordnet werden.The flue gas duct 3 lying between the combustion chamber 2 and the external flue gas duct 4 is assigned to the water-steam circuit of the steam generator and has a multiplicity of heating surfaces 3a which are acted upon by water or steam. Except for point A, the flue gas flue is essentially evenly covered with heating surfaces 3a. The flue gas flue 4 on the outside is integrated in a sodium circuit, for example in the sodium circuits according to Figure 10 or 11 of the above-mentioned literature reference. A component of the sodium circuit is a heater which, in the embodiment shown, consists of a plurality of heating surfaces 4a arranged one above the other, which are connected in series. Relatively cold enters the heater from below through one or more inlet lines 5 Sodium and is discharged after heating via one or more outlet lines 6. Thus, while the sodium in the heating surfaces 4a connected in series rises from the bottom to the top, the partial smoke flow associated with the flue gas flow flows in countercurrent from the top to the bottom. The flue gas emerging from the flue gas duct 4 below is fed to the flue gas duct 3 at point A via a flue gas duct 7, since the outlet temperature of the flue gas from the flue gas duct 4 essentially corresponds to the temperature prevailing at point A. One or more control flaps 8 are arranged in the one or more flue gas ducts 7 in order to regulate the quantity of flue gas entering the flue gas duct 4 and thus the heat to be coupled out via the sodium circuit. Between inlet 5 and outlet 6 there can preferably be a connection line which can be switched on and off and which can be switched on in the event of failure of the circulation pump or pumps present in sodium circulation to enable natural circulation and emergency cooling. It is also possible for the pumps to be assigned corresponding bypass lines.

Die Heizflächen 3a und 4a liegen vorzugsweise in gleichen Ebenen, damit ihnen gleiche Bühnen und evtl. gleiche Hilfseinrichtungen zugeordnet werden können.The heating surfaces 3a and 4a are preferably on the same levels, so that the same platforms and possibly the same auxiliary devices can be assigned to them.

Abschließend soll darauf aufmerksam gemacht werden, daß in den Ansprüchen und in der Beschreibung unter "Kohle" sowohl Steinkohlen, Braunkohlen, Koks und im weitesten Sinne andere feste Brennstoffe oder aus diesen abgeleitete Sekundärbrennstoffe (vgl. z. B. Bild 10 der obigen Literaturstelle) verstanden werden.In conclusion, attention should be drawn to the fact that in the claims and in the description under "coal", both hard coal, lignite, coke and in the broadest sense other solid fuels or secondary fuels derived therefrom (cf. for example Figure 10 of the above literature reference) be understood.

Schließlich ist anzumerken, daß vorzugsweise der Erhit­zer aus einer Vielzahl von bezogen auf den Niederdruck-­Wärmeträger-Kreislauf hintereinander geschalteten Heiz­flächen 4a aufgebaut ist, die bezüglich des Rauchgas­stroms im Gleichstrom oder Gegenstrom angeordnet sind.Finally, it should be noted that the heater is preferably constructed from a multiplicity of heating surfaces 4a which are connected in series with respect to the low-pressure heat transfer medium circuit and are arranged in cocurrent or countercurrent with respect to the flue gas stream.

Claims (8)

1. Kohlegefeuerter Dampferzeuger mit einem Wasser-Dampf­kreislauf und einem Niederdruck-Wärmeträger-Kreis­lauf, der über einen im Rauchgasstrom des Dampferzeu­gers angeordneten Erhitzer mit mindestens einer Heizfläche Wärme aus dem Rauchgasstrom auskoppelt und in einen Wärme verbrauchenden Prozeß einbindet, insbesondere Kohle-Kombiblock mit einer in den Wasser-Dampfkreislauf eingeschalteten Dampfturbine und einen Gasturbinenprozeß dadurch gekennzeichnet, daß der Rauchgasstrom auf mindestens zwei dem Feuerraum (2) parallel nachgeschaltete Rauchgaszüge (3, 4) aufgeteilt wird, von denen der eine (4) dem Wasser-Dampf-Kreislauf und der andere dem Niederdruck-Wärmeträger-Kreislauf zugeordnet ist.1. Coal-fired steam generator with a water-steam circuit and a low-pressure heat transfer circuit, which couples heat from the flue gas stream via a heater arranged in the flue gas stream of the steam generator and integrates heat into a heat-consuming process, in particular a coal combination block with an in the steam-steam circuit switched on and a gas turbine process characterized in that the flue gas flow is divided into at least two flue gas flues (3, 4) connected in parallel to the combustion chamber (2), one of which (4) the water-steam cycle and the other is assigned to the low-pressure heat transfer circuit. 2. Dampferzeuger nach Anspruch 1, dadurch ge­kennzeichnet, daß die Rauchgaszüge (3, 4) nebeneinander angeordnet sind.2. Steam generator according to claim 1, characterized in that the flue gas flues (3, 4) are arranged side by side. 3. Dampferzeuger nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Rauchgaszüge vertikal oder horizontal angeordnet sind.3. Steam generator according to claim 1 or 2, characterized in that the flue gas flues are arranged vertically or horizontally. 4. Dampferzeuger nach einem der Ansprüche 1-3, da­durch gekennzeichnet, daß der aus dem Niederdruck-Wärmeträger-Rauchgaszug (4) austretende Rauchgasteilstrom in den Wasser-Dampf-Zug (3) an einer Stelle (A) zugeführt wird, an der die Temperatur des zugeführten Rauchgasteilstromes im wesentlichen der Temperatur des im Wasser-Dampf-­Rauchgaszuges strömenden Rauchgases entspricht.4. Steam generator according to one of claims 1-3, characterized in that from the low-pressure heat transfer flue (4) escaping flue gas partial flow is fed into the water-steam train (3) at a point (A) at which the temperature of the supplied partial flue gas flow essentially corresponds to the temperature of the flue gas flowing in the water-steam flue gas train. 5. Dampferzeuger nach einem der Ansprüche 1-4, da­durch gekennzeichnet, daß der Erhitzer aus einer Vielzahl von bezogen auf den Niederdruck-Wärmeträger-Kreislauf hintereinander geschalteten Heizflächen (4a) aufgabaut ist, die bezüglich des Rauchgasstroms im Gleichstrom oder Gegenstrom angeordnet sind.5. Steam generator according to one of claims 1-4, characterized in that the heater is built up from a plurality of heating surfaces (4a) connected in series with respect to the low-pressure heat transfer medium circuit, which are arranged in cocurrent or countercurrent with respect to the flue gas stream. 6. Dampferzeuger nach einem der Ansrpüche 1-5, da­durch gekennzeichnet, daß der Natrium-Rauchgaszug als Regelzug (8) ausgebildet ist.6. Steam generator according to one of claims 1-5, characterized in that the sodium flue gas train is designed as a control train (8). 7. Dampferzeuger nach einem der Ansprüche 1-6, dadurch gekennzeichnet, daß der Feuerraum (2) des Dampferzeugers (1) und die beiden Rauchgaszüge (3, 4) in einer Reihe angeordnet sind derart, daß der Wasser-Dampf-Rauchgaszug (3) zwischen dem Feuerraum (2) und dem Niederdruck-Wärme­träger-Rauchgaszug angeordnet ist.7. Steam generator according to one of claims 1-6, characterized in that the combustion chamber (2) of the steam generator (1) and the two flue gas flues (3, 4) are arranged in a row such that the water-steam flue gas flue (3 ) is arranged between the combustion chamber (2) and the low-pressure heat transfer flue. 8. Dampferzeuger mit einem Freiraum zwischen aufsteigen­dem Feuerraum und absteigendem Rauchgaszug nach einem der Ansprüche 1-7, dadurch gekenn­zeichnet, daß eine Leitung (7) für die Über­führung des Rauchgases aus dem Niederdruck-Wärme­träger-Zug (4) in den Wasser-Dampf-Zug (3) diesem Freiraum an die Stelle (A) geführt wird, an der in etwa Temperaturgleichheit gegeben ist.8. Steam generator with a space between the ascending combustion chamber and descending flue gas flue according to one of claims 1-7, characterized in that a line (7) for the transfer of the flue gas from the low-pressure heat transfer train (4) in the water-steam Train (3) this free space is led to the point (A), where there is approximately equal temperature.
EP86114857A 1985-11-07 1986-10-25 Coal-fired steam generator for a combined coal power plant Expired EP0224050B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3539481 1985-11-07
DE19853539481 DE3539481A1 (en) 1985-11-07 1985-11-07 COAL-FIRED STEAM GENERATOR FOR COAL COMBINED BLOCK

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EP0224050A1 true EP0224050A1 (en) 1987-06-03
EP0224050B1 EP0224050B1 (en) 1989-03-15

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EP86114857A Expired EP0224050B1 (en) 1985-11-07 1986-10-25 Coal-fired steam generator for a combined coal power plant

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US (1) US4739729A (en)
EP (1) EP0224050B1 (en)
JP (1) JPS62162806A (en)
DE (2) DE3539481A1 (en)
ZA (1) ZA868431B (en)

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EP0481002A1 (en) * 1989-07-20 1992-04-22 SHELOR, F Mack Method of retrofitting existing power plants

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US5683550A (en) * 1996-02-05 1997-11-04 Ahlstrom Recovery Inc. Method and apparatus for increasing recovery boiler capacity by withdrawing combustible gas from the furnace
US7803216B2 (en) * 2005-12-28 2010-09-28 Mitsubishi Heavy Industries, Ltd. Pressurized high-temperature gas cooler
JP5575342B1 (en) * 2014-02-03 2014-08-20 三菱重工業株式会社 Gasification furnace cooling structure, gasification furnace, and method for expanding annulus part of gasification furnace

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EP0481002A4 (en) * 1989-07-20 1994-08-24 F Mack Shelor Method of retrofitting existing power plants

Also Published As

Publication number Publication date
DE3662460D1 (en) 1989-04-20
US4739729A (en) 1988-04-26
JPS62162806A (en) 1987-07-18
DE3539481A1 (en) 1987-05-21
ZA868431B (en) 1987-06-24
DE3539481C2 (en) 1988-09-29
EP0224050B1 (en) 1989-03-15

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