EP2426322A1 - Fluid circuit for a power plant and method for chemical cleaning of same - Google Patents

Fluid circuit for a power plant and method for chemical cleaning of same Download PDF

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Publication number
EP2426322A1
EP2426322A1 EP10175409A EP10175409A EP2426322A1 EP 2426322 A1 EP2426322 A1 EP 2426322A1 EP 10175409 A EP10175409 A EP 10175409A EP 10175409 A EP10175409 A EP 10175409A EP 2426322 A1 EP2426322 A1 EP 2426322A1
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EP
European Patent Office
Prior art keywords
fluid circuit
cleaning
temporary
power plant
emptying
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Withdrawn
Application number
EP10175409A
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German (de)
French (fr)
Inventor
Klaus-Dieter Kuhnke
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Siemens AG
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Siemens AG
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Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP10175409A priority Critical patent/EP2426322A1/en
Priority to PCT/EP2011/064741 priority patent/WO2012031913A1/en
Publication of EP2426322A1 publication Critical patent/EP2426322A1/en
Withdrawn legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00General layout or general methods of operation of complete plants
    • F01K13/006Auxiliaries or details not otherwise provided for
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027Cleaning the internal surfaces; Removal of blockages
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • C23G1/19Iron or steel
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00Apparatus for cleaning or pickling metallic material
    • C23G3/04Apparatus for cleaning or pickling metallic material for cleaning pipes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00Component parts or details of steam boilers
    • F22B37/02Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/48Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
    • F22B37/486Devices for removing water, salt, or sludge from boilers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00Component parts or details of steam boilers
    • F22B37/02Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/48Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
    • F22B37/52Washing-out devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28GCLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G9/00Cleaning by flushing or washing, e.g. with chemical solvents

Definitions

  • the invention relates to a fluid circuit for a power plant with a permanent part to be cleaned and a temporary part for the dry cleaning of the permanent part.
  • the invention further relates to a method for chemically cleaning a fluid circuit, in particular a water-steam cycle in a power plant.
  • the water-steam cycle Before newly built power plants (GUD and DKW) are put into operation, the water-steam cycle must be cleaned.
  • the cleaning process consists of three process steps. In a first step, the water-steam cycle is rinsed with water to remove loose particles and deposits. In a second step, the chemical cleaning is carried out to remove iron oxides. In the final step, the water-steam circuit is purged with steam to remove the debris and particles not removed by the first step. In addition to this commonly used method, there is still the less common way to blow out with air or boil with chemicals.
  • the invention relates in essence to the step of dry cleaning. This step is usually carried out at GUD and steam power plants with inhibited hydrofluoric acid.
  • This step is usually carried out at GUD and steam power plants with inhibited hydrofluoric acid.
  • hydrofluoric acid is problematic because it is hazardous to health (Hazardous material: marking T + [very toxic] and C [corrosive]) and it has been shown that new, high temperature resistant materials after chemical cleaning with hydrofluoric acid have massive corrosion.
  • the invention has for its object to provide an apparatus and a method by which water-steam cycles can be cleaned for power plants in a reliable and cost-effective manner.
  • a cleaning should be possible without the use of hydrofluoric acid.
  • the lowest-lying emptying device is suitable for use temperatures above 150 ° C.
  • the lowest located emptying device is suitable for application temperatures up to 220 ° C.
  • the complexing agent can be used over a wide range of effects.
  • the fluid circuit is designed for a pressure up to 40 bar.
  • components of the temporary part which come into contact with a solution for the dry cleaning, at least at their contact surface with the solution of a higher-alloyed material.
  • the higher-alloyed material is stainless steel.
  • the temporary part can be installed in a simple and cost-effective manner.
  • the lowest located emptying device is arranged in the permanent part. In this case, the number of emptying devices in the temporary part can be reduced.
  • a circulation pump device with a power that makes it possible to pump a volume of the fluid circuit in 0.5 to 1.5 hours.
  • Lower power leads to poor temperature distribution in the fluid circuit to be cleaned, faster pumping causes too high flow rates and as a result erosion.
  • the fluid circuit comprises a sampling device with a sampling cooler.
  • a sampling cooler With the sampling cooler, re-evaporation and thus falsification during sampling of hot media (cleaning solution) is avoided.
  • an ammonium salt of an organic complexing agent (EDTA) and hydrazine (N 2 H 4 ) as a reducing agent are components of the cleaning solution.
  • EDTA dissolves iron up to a concentration of 30g Fe / 1.
  • the EDTA-iron chelate complex is non-toxic.
  • the cleaning is carried out at application temperatures between 130 ° C and 160 ° C.
  • EDTA is used as the organic complexing agent.
  • a reducing agent for example hydrazine, is added to the organic complexing agent.
  • Essential in the inventive method is to heat the entire fluid circuit with temporary means to 120 to a maximum of 220 ° C, preferably 150 ° C and then chemically clean the entire fluid circuit with few merging steps without intermediate emptying or cooling.
  • FIG. 1 shows schematically and by way of example a fluid circuit 1 of a power plant with a permanent part 2, the water-steam cycle of the power plant part to be cleaned, and a temporary part 3 for the dry cleaning of the permanent part 2.
  • the permanent part 2 comprises not shown, low, medium and high pressure areas, which may be cleaned separately.
  • the permanent part 2 has higher 4 and lower 5 areas, wherein in the lower areas 5 emptying devices 6 or so-called low point discharges are arranged.
  • the temporary part 3 is arranged substantially below the permanent part 2 of the power plant and also has emptying devices 7 at its lowest points.
  • the temporary part 3 is designed as a closed system for use temperatures up to 120 ° C, preferably 150 ° C, and pressures of 10 to 40 bar.
  • the components of the temporary part 3, which come into contact with the cleaning solution, should be at least at their contact surface with the solution of stainless steel or similar higher alloyed material. All low points 6,7 in the fluid circuit 1 must allow a controlled emptying up to the application temperature.
  • the temporary part 3 of the fluid circuit 1 comprises a circulating pump device 8 whose power in m 3 / h approximately corresponds to the system volume of the fluid circuit 1 or, if necessary, is greater. Furthermore, the temporary part 3 comprises a metering pump 9 to dose a defined amount of chemicals 10 at the application temperature, and a sampling device 11 with a sampling cooler. With the sampling cooler, re-evaporation and thus falsification during sampling of hot media (cleaning solution) is avoided. To heat the system up to the application temperature the fluid circuit 1 via a steam line 12 for the controlled steam supply.
  • FIG. 2 shows an alternative embodiment of the fluid circuit 1 of the invention.
  • the temporary part 3 is arranged substantially above the permanent part 2, or at least arranged such that its lowest lying areas are above the lower edge of the permanent part 2, so that the number of emptying devices 7 in the temporary part 3 can be reduced.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

Fluid circuit (1) comprises a permanent part (2) to be cleaned and a temporary part (3) for the chemical cleaning of the permanent part and a discharging device located at the bottom side, which is suitable for application temperature of above 120[deg] C. An independent claim is also included for chemical cleaning of the fluid circuit in a power plant with a cleaning solution, comprising an organic complexing agent, where temporary lines are laid and the chemical cleaning is carried out at 120-220[deg] C.

Description

Die Erfindung betrifft einen Fluid-Kreislauf für eine Kraftwerksanlage mit einem permanenten, zu reinigenden Teil und einen temporären Teil für die chemische Reinigung des permanenten Teils. Die Erfindung betrifft ferner ein Verfahren zum chemischen Reinigen eines Fluid-Kreislaufs insbesondere eines Wasser-Dampf-Kreislaufs in einem Kraftwerk.The invention relates to a fluid circuit for a power plant with a permanent part to be cleaned and a temporary part for the dry cleaning of the permanent part. The invention further relates to a method for chemically cleaning a fluid circuit, in particular a water-steam cycle in a power plant.

Bevor neugebaute Kraftwerke (GUD und DKW) in Betrieb genommen werden, muss der Wasser-Dampf-Kreislauf gereinigt werden. Das Reinigungsverfahren setzt sich aus drei Verfahrensschritten zusammen. In einem ersten Schritt wird der Wasser-Dampf-Kreislauf mit Wasser gespült, um lose Partikel und Ablagerungen zu entfernen. In einem zweiten Schritt erfolgt die chemische Reinigung, um Eisenoxide zu entfernen. Im letzten Schritt wird der Wasser-Dampf-Kreislauf mit Dampf ausgeblasen, um die mit dem ersten Schritt nicht entfernten Ablagerungen und Partikel zu entfernen. Neben diesem allgemein angewendeten Verfahren gibt es noch die seltener angewendete Möglichkeit, mit Luft auszublasen oder mit Chemikalien auszukochen.Before newly built power plants (GUD and DKW) are put into operation, the water-steam cycle must be cleaned. The cleaning process consists of three process steps. In a first step, the water-steam cycle is rinsed with water to remove loose particles and deposits. In a second step, the chemical cleaning is carried out to remove iron oxides. In the final step, the water-steam circuit is purged with steam to remove the debris and particles not removed by the first step. In addition to this commonly used method, there is still the less common way to blow out with air or boil with chemicals.

Die Erfindung bezieht sich im Kern auf den Schritt der chemischen Reinigung. Dieser Schritt wird bei GUD- und Dampf-Kraftwerken meist mit inhibierter Flusssäure durchgeführt. Die Verwendung von Flusssäure ist jedoch problematisch, da sie gesundheitsschädlich ist (Gefahrstoff: Kennzeichnung T+ [sehr giftig] und C [ätzend]) und es sich gezeigt hat, dass neue, hochtemperaturbeständige Werkstoffe nach einer chemischen Reinigung mit Flusssäure massive Korrosion aufweisen.The invention relates in essence to the step of dry cleaning. This step is usually carried out at GUD and steam power plants with inhibited hydrofluoric acid. However, the use of hydrofluoric acid is problematic because it is hazardous to health (Hazardous material: marking T + [very toxic] and C [corrosive]) and it has been shown that new, high temperature resistant materials after chemical cleaning with hydrofluoric acid have massive corrosion.

Alle gängigen Reinigungsverfahren haben eine Anwendungstemperatur von <100°C. Das selten angewendete Auskochen bei höheren Temperaturen findet ohne die Verwendung temperaturfester Provisorien statt und erlaubt keine kontrollierte Anwendung der Chemikalien.All common cleaning methods have an application temperature of <100 ° C. The rarely used boil-out at higher temperatures is more temperature-resistant without use Temporaries instead and does not allow controlled use of chemicals.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung und ein Verfahren anzugeben, mit denen in zuverlässiger und kostengünstiger Weise Wasser-Dampf-Kreisläufe für Kraftwerksanlagen gereinigt werden können. Insbesondere soll eine Reinigung ohne Einsatz von Flusssäure möglich sein.The invention has for its object to provide an apparatus and a method by which water-steam cycles can be cleaned for power plants in a reliable and cost-effective manner. In particular, a cleaning should be possible without the use of hydrofluoric acid.

Erfindungsgemäß wird diese Aufgabe gelöst durch die Vorrichtung gemäß Anspruch 1 und das Verfahren gemäß Anspruch 13. Vorteilhafte Weiterbildungen der Erfindung sind in den jeweiligen abhängigen Ansprüchen definiert. Indem bei einem Fluid-Kreislauf für eine Kraftwerksanlage, umfassend einen permanenten, zu reinigenden Teil und einen temporären Teil für die chemische Reinigung des permanenten Teils, eine am tiefsten gelegene Entleerungseinrichtung für Anwendungstemperaturen über 120°C geeignet ist, wird folgendes erreicht:According to the invention this object is achieved by the device according to claim 1 and the method according to claim 13. Advantageous developments of the invention are defined in the respective dependent claims. In a fluid circuit for a power plant comprising a permanent part to be cleaned and a temporary part for the dry cleaning of the permanent part, by providing a deepest discharge device for use temperatures above 120 ° C, the following is achieved:

Bei der Reinigung eines Fluid-Kreislaufs in Kraftwerken kann kontrolliert ein alkalisch reduzierender Komplexbildner eingesetzt werden, dessen Wirkungsbereich über 120°C liegt.When cleaning a fluid circuit in power plants, it is possible to use in an controlled manner an alkaline-reducing complexing agent whose effective range is above 120 ° C.

Dabei ist es vorteilhaft, wenn alle Entleerungseinrichtungen eine kontrollierte Entleerung bis zu Anwendungstemperaturen von 120°C erlauben.It is advantageous if all emptying devices allow a controlled emptying up to application temperatures of 120 ° C.

Weiterhin ist es vorteilhaft, wenn die am tiefsten gelegene Entleerungseinrichtung für Anwendungstemperaturen über 150°C geeignet ist.Furthermore, it is advantageous if the lowest-lying emptying device is suitable for use temperatures above 150 ° C.

Insbesondere ist es vorteilhaft, wenn die am tiefsten gelegene Entleerungseinrichtung für Anwendungstemperaturen bis 220°C geeignet ist.In particular, it is advantageous if the lowest located emptying device is suitable for application temperatures up to 220 ° C.

Somit lässt sich der Komplexbildner über einen weiten Wirkungsbereich einsetzten.Thus, the complexing agent can be used over a wide range of effects.

Dabei ist es zweckmäßig, wenn der Fluid-Kreislauf für einen Druck bis zu 40 bar ausgelegt ist.It is expedient if the fluid circuit is designed for a pressure up to 40 bar.

In einer vorteilhaften Ausführungsform sind Komponenten des temporären Teils, die mit einer Lösung für die chemische Reinigung in Berührung kommen, zumindest an ihrer Kontaktfläche mit der Lösung aus einem höherlegierten Werkstoff.In an advantageous embodiment, components of the temporary part, which come into contact with a solution for the dry cleaning, at least at their contact surface with the solution of a higher-alloyed material.

Insbesondere ist es vorteilhaft, wenn der höherlegierte Werkstoff Edelstahl ist.In particular, it is advantageous if the higher-alloyed material is stainless steel.

Es ist zweckmäßig, wenn die am tiefsten gelegene Entleerungseinrichtung im temporären Teil angeordnet ist. Somit lässt sich der temporäre Teil auf einfache und kostengünstige Weise installieren.It is expedient if the lowest located emptying device is arranged in the temporary part. Thus, the temporary part can be installed in a simple and cost-effective manner.

Es kann aber auch zweckmäßig sein, wenn die am tiefsten gelegene Entleerungseinrichtung im permanenten Teil angeordnet ist. In diesem Fall kann die Anzahl der Entleerungseinrichtungen im temporären Teil reduziert werden.But it may also be appropriate if the lowest located emptying device is arranged in the permanent part. In this case, the number of emptying devices in the temporary part can be reduced.

Vorteilhafter Weise ist eine Umwälzpumpeinrichtung mit einer Leistung, die es ermöglicht, ein Volumen des Fluid-Kreislaufs in 0,5 bis 1,5 Stunden umzupumpen. Eine geringere Leistung führt zu einer schlechten Temperaturverteilung im zu reinigenden Fluid-Kreislauf, ein schnelleres Umpumpen verursacht zu hohe Strömungsraten und in deren Folge Erosion.Advantageously, a circulation pump device with a power that makes it possible to pump a volume of the fluid circuit in 0.5 to 1.5 hours. Lower power leads to poor temperature distribution in the fluid circuit to be cleaned, faster pumping causes too high flow rates and as a result erosion.

In einer vorteilhaften Ausführungsform umfasst der Fluid-Kreislauf eine Probenahmeeinrichtung mit einem Probenahmekühler. Mit dem Probenahmekühler werden Nachverdampfung und damit Verfälschungen bei der Probenahme von heißen Medien (Reinigungslösung) vermieden.In an advantageous embodiment, the fluid circuit comprises a sampling device with a sampling cooler. With the sampling cooler, re-evaporation and thus falsification during sampling of hot media (cleaning solution) is avoided.

Vorteilhafter Weise sind ein Ammoniumsalz eines organischen Komplexbildners (EDTA) und Hydrazin (N2H4) als Reduktionsmittel Bestandteile der Reinigungslösung. EDTA löst Eisen bis zu einer Konzentration von 30g Fe /1. Der EDTA-Eisen-Chelatkomplex ist nicht-toxisch.Advantageously, an ammonium salt of an organic complexing agent (EDTA) and hydrazine (N 2 H 4 ) as a reducing agent are components of the cleaning solution. EDTA dissolves iron up to a concentration of 30g Fe / 1. The EDTA-iron chelate complex is non-toxic.

Im erfinderischen Verfahren zum chemischen Reinigen eines Fluid-Kreislaufs in einem Kraftwerk mit einer Reinigungslösung, die einen organischen Komplexbildner umfasst, werden temporäre Leitungen verlegt und die chemische Reinigung bei Anwendungstemperaturen zwischen 120°C und 220°C durchgeführt.In the inventive method for chemically cleaning a fluid circuit in a power plant with a cleaning solution comprising an organic complexing agent, temporary conduits are laid and chemical cleaning performed at application temperatures between 120 ° C and 220 ° C.

Vorteilhafter Weise wird die Reinigung bei Anwendungstemperaturen zwischen 130°C und 160°C durchgeführt.Advantageously, the cleaning is carried out at application temperatures between 130 ° C and 160 ° C.

Zum Erreichen der Anwendungstemperatur ist es zweckmäßig, wenn Dampf in den Fluid-Kreislauf eingespeist wird.To reach the application temperature, it is expedient if steam is fed into the fluid circuit.

Vorteilhafter Weise wird EDTA als organischer Komplexbildner verwendet.Advantageously, EDTA is used as the organic complexing agent.

Zweckmäßiger Weise wird dem organischen Komplexbildner ein Reduktionsmittel, beispielsweise Hydrazin, zugefügt.Conveniently, a reducing agent, for example hydrazine, is added to the organic complexing agent.

Wesentlich beim erfinderischen Verfahren ist es, den kompletten Fluid-Kreislauf mit temporären Mitteln auf 120 bis maximal 220°C, vorzugsweise 150°C aufzuheizen und dann mit wenigen ineinander übergehenden Schritten ohne Zwischenentleerung oder Abkühlung den gesamten Fluid-Kreislauf chemisch zu reinigen.Essential in the inventive method is to heat the entire fluid circuit with temporary means to 120 to a maximum of 220 ° C, preferably 150 ° C and then chemically clean the entire fluid circuit with few merging steps without intermediate emptying or cooling.

Die Erfindung wird beispielhaft anhand der Zeichnungen näher erläutert. Es zeigen schematisch und nicht maßstäblich:

Figur 1
einen Fluid-Kreislauf einer Kraftwerksanlage mit einem im Wesentlichen unter dem permanenten Teil angeordneten temporären Teil und
Figur 2
einen Fluid-Kreislauf einer Kraftwerksanlage mit einem im Wesentlichen über dem permanenten Teil angeordneten temporären Teil.
The invention will be explained in more detail by way of example with reference to the drawings. Shown schematically and not to scale:
FIG. 1
a fluid circuit of a power plant with a substantially disposed under the permanent part temporary part and
FIG. 2
a fluid circuit of a power plant with a substantially over the permanent part arranged temporary part.

Die Figur 1 zeigt schematisch und beispielhaft einen Fluid-Kreislauf 1 einer Kraftwerksanlage mit einem permanenten Teil 2, dem Wasser-Dampf-Kreislauf des Kraftwerksteils, der gereinigt werden soll, und einem temporären Teil 3 für die chemische Reinigung des permanenten Teils 2. Der permanente Teil 2 umfasst nicht näher dargestellte Nieder-, Mittel- und Hochdruckbereiche, die gegebenenfalls separat gereinigt werden. Der permanente Teil 2 weist höher 4 und tiefer 5 gelegene Bereiche auf, wobei in den tiefer gelegenen Bereichen 5 Entleerungseinrichtungen 6 oder sogenannte Tiefpunktentleerungen angeordnet sind.The FIG. 1 shows schematically and by way of example a fluid circuit 1 of a power plant with a permanent part 2, the water-steam cycle of the power plant part to be cleaned, and a temporary part 3 for the dry cleaning of the permanent part 2. The permanent part 2 comprises not shown, low, medium and high pressure areas, which may be cleaned separately. The permanent part 2 has higher 4 and lower 5 areas, wherein in the lower areas 5 emptying devices 6 or so-called low point discharges are arranged.

Zur chemischen Reinigung des permanenten Teils 2 müssen temporäre Leitungen verlegt werden. In der Ausführungsform der Figur 1 ist der temporäre Teil 3 im Wesentlichen unterhalb des permanenten Teils 2 des Kraftwerks angeordnet und weist ebenfalls an seinen am tiefsten gelegenen Stellen Entleerungseinrichtungen 7 auf. Der temporäre Teil 3 ist als geschlossenes System für Anwendungstemperaturen bis 120°C, vorzugsweise 150°C, und Drucke von 10 bis 40 bar ausgelegt. Die Komponenten des temporären Teils 3, die mit der Reinigungslösung in Berührung kommen, sollten zumindest an ihrer Kontaktfläche mit der Lösung aus Edelstahl oder vergleichbarem höherlegiertem Werkstoff bestehen. Alle Tiefpunkte 6,7 im Fluid-Kreislauf 1 müssen eine kontrollierte Entleerung bis zur Anwendungstemperatur erlauben.To dry the permanent part 2 temporarily, temporary cables must be laid. In the embodiment of the FIG. 1 the temporary part 3 is arranged substantially below the permanent part 2 of the power plant and also has emptying devices 7 at its lowest points. The temporary part 3 is designed as a closed system for use temperatures up to 120 ° C, preferably 150 ° C, and pressures of 10 to 40 bar. The components of the temporary part 3, which come into contact with the cleaning solution, should be at least at their contact surface with the solution of stainless steel or similar higher alloyed material. All low points 6,7 in the fluid circuit 1 must allow a controlled emptying up to the application temperature.

Der temporäre Teil 3 des Fluid-Kreislaufs 1 umfasst eine Umwälzpumpeinrichtung 8, deren Leistung in m3/h ungefähr dem Systemvolumen des Fluid-Kreislaufs 1 entspricht oder ggfs. größer ist. Weiterhin umfasst der temporäre Teil 3 eine Dosierpumpe 9, um eine definierte Menge Chemikalien 10 bei Anwendungstemperatur zu dosieren, sowie eine Probenahmeeinrichtung 11 mit einem Probenahmekühler. Mit dem Probenahmekühler werden Nachverdampfung und damit Verfälschungen bei der Probenahme von heißen Medien (Reinigungslösung) vermieden. Zum Aufheizen des Systems bis zur Anwendungstemperatur verfügt der Fluid-Kreislauf 1 über eine Dampfleitung 12 für die kontrollierte Dampfeinspeisung.The temporary part 3 of the fluid circuit 1 comprises a circulating pump device 8 whose power in m 3 / h approximately corresponds to the system volume of the fluid circuit 1 or, if necessary, is greater. Furthermore, the temporary part 3 comprises a metering pump 9 to dose a defined amount of chemicals 10 at the application temperature, and a sampling device 11 with a sampling cooler. With the sampling cooler, re-evaporation and thus falsification during sampling of hot media (cleaning solution) is avoided. To heat the system up to the application temperature the fluid circuit 1 via a steam line 12 for the controlled steam supply.

Figur 2 zeigt eine alternative Ausführungsform des Fluid-Kreislaufs 1 der Erfindung. Im Unterschied zur Ausführungsform der Figur 1 ist der temporäre Teil 3 im Wesentlichen oberhalb des permanenten Teils 2 angeordnet, oder zumindest so angeordnet, dass seine am tiefsten gelegenen Bereiche oberhalb der Unterkante des permanenten Teils 2 liegen, so dass die Anzahl der Entleerungseinrichtungen 7 im temporären Teil 3 reduziert werden kann. FIG. 2 shows an alternative embodiment of the fluid circuit 1 of the invention. In contrast to the embodiment of FIG. 1 For example, the temporary part 3 is arranged substantially above the permanent part 2, or at least arranged such that its lowest lying areas are above the lower edge of the permanent part 2, so that the number of emptying devices 7 in the temporary part 3 can be reduced.

Claims (18)

Fluid-Kreislauf (1) für eine Kraftwerksanlage, umfassend einen permanenten (2), zu reinigenden Teil und einen temporären Teil (3) für die chemische Reinigung des permanenten Teils (2), dadurch gekennzeichnet, dass eine am tiefsten gelegene Entleerungseinrichtung (6, 7) für Anwendungstemperaturen über 120°C geeignet ist.A fluid circuit (1) for a power plant, comprising a permanent part (2) to be cleaned and a temporary part (3) for the dry cleaning of the permanent part (2), characterized in that a lowermost discharge device (6, 7) is suitable for application temperatures above 120 ° C. Fluid-Kreislauf (1) nach Anspruch 1, wobei alle Entleerungseinrichtungen (6,7) eine kontrollierte Entleerung bis zu Anwendungstemperaturen von 120°C erlauben.A fluid circuit (1) according to claim 1, wherein all the emptying means (6, 7) allow controlled emptying up to application temperatures of 120 ° C. Fluid-Kreislauf (1) nach einem der Ansprüche 1 oder 2, wobei die am tiefsten gelegene Entleerungseinrichtung (6,7) für Anwendungstemperaturen über 150°C geeignet ist.Fluid circuit (1) according to one of claims 1 or 2, wherein the lowest-lying emptying device (6,7) for application temperatures above 150 ° C is suitable. Fluid-Kreislauf (1) nach einem der vorhergehenden Ansprüche, wobei die am tiefsten gelegene Entleerungseinrichtung (6,7) für Anwendungstemperaturen bis 220°C geeignet ist.Fluid circuit (1) according to one of the preceding claims, wherein the lowest-lying emptying device (6,7) for application temperatures up to 220 ° C is suitable. Fluid-Kreislauf (1) nach einem der vorhergehenden Ansprüche, wobei der Fluid-Kreislauf (1) für einen Druck bis zu 40 bar ausgelegt ist.Fluid circuit (1) according to one of the preceding claims, wherein the fluid circuit (1) is designed for a pressure up to 40 bar. Fluid-Kreislauf (1) nach einem der vorhergehenden Ansprüche, wobei Komponenten des temporären Teils (3), die mit einer Lösung für die chemische Reinigung in Berührung kommen, zumindest an ihrer Kontaktfläche mit der Lösung aus einem höherlegierten Werkstoff sind.A fluid circuit (1) according to any one of the preceding claims, wherein components of the temporary part (3) which come into contact with a solution for chemical cleaning are at least at their contact surface with the solution of a higher alloyed material. Fluid-Kreislauf (1) nach Anspruch 6, wobei der höherlegierte Werkstoff Edelstahl ist.The fluid circuit (1) of claim 6, wherein the higher alloy material is stainless steel. Fluid-Kreislauf (1) nach einem der vorhergehenden Ansprüche, wobei die am tiefsten gelegene Entleerungseinrichtung (7) im temporären Teil angeordnet ist.Fluid circuit (1) according to one of the preceding claims, wherein the lowest located emptying device (7) is arranged in the temporary part. Fluid-Kreislauf (1) nach einem der Ansprüche 1 bis 7, wobei die am tiefsten gelegene Entleerungseinrichtung (6) im permanenten Teil angeordnet ist.A fluid circuit (1) according to any one of claims 1 to 7, wherein the lowest-lying evacuation means (6) is arranged in the permanent part. Fluid-Kreislauf (1) nach einem der vorhergehenden Ansprüche, weiter umfassend eine Umwälzpumpeinrichtung (8) mit einer Leistung, die es ermöglicht, ein Volumen des Fluid-Kreislaufs (1) in 0,5 bis 1,5 Stunden umzupumpen.A fluid circuit (1) according to any one of the preceding claims, further comprising a recirculation pump means (8) having a capacity which allows a volume of the fluid circuit (1) to be circulated in 0.5 to 1.5 hours. Fluid-Kreislauf (1) nach einem der vorhergehenden Ansprüche, weiter umfassend eine Probenahmeeinrichtung (11) mit einem Probenahmekühler.Fluid circuit (1) according to one of the preceding claims, further comprising a sampling device (11) with a sampling cooler. Fluid-Kreislauf (1) nach einem der vorhergehenden Ansprüche, wobei EDTA und Hydrazin Bestandteile der Reinigungslösung sind.A fluid circuit (1) according to any one of the preceding claims, wherein EDTA and hydrazine are components of the cleaning solution. Verfahren zum chemischen Reinigen eines Fluid-Kreislaufs (1) in einem Kraftwerk mit einer Reinigungslösung, die einen organischen Komplexbildner umfasst, wobei temporäre Leitungen verlegt werden, dadurch gekennzeichnet, dass die chemische Reinigung bei Anwendungstemperaturen zwischen 120°C und 220°C durchgeführt wird.Method for chemically cleaning a fluid circuit (1) in a power plant with a cleaning solution comprising an organic complexing agent, wherein temporary lines are laid, characterized in that the chemical cleaning is carried out at application temperatures between 120 ° C and 220 ° C. Verfahren nach Anspruch 13, wobei die Reinigung bei Anwendungstemperaturen zwischen 130°C und 160°C durchgeführt wird.The method of claim 13, wherein the cleaning is carried out at application temperatures between 130 ° C and 160 ° C. Verfahren nach einem der Ansprüche 13 oder 14, wobei Dampf in den Fluid-Kreislauf (1) eingespeist wird, bis eine Anwendungstemperatur erreicht ist.Method according to one of claims 13 or 14, wherein steam is fed into the fluid circuit (1) until an application temperature is reached. Verfahren nach einem der Ansprüche 13 bis 15, wobei EDTA als organischer Komplexbildner verwendet wird.A method according to any one of claims 13 to 15, wherein EDTA is used as the organic complexing agent. Verfahren nach einem der Ansprüche 13 bis 16, wobei dem organischen Komplexbildner ein Reduktionsmittel zugefügt wird.A method according to any one of claims 13 to 16, wherein a reducing agent is added to the organic complexing agent. Verfahren nach Anspruch 17, wobei dem organischen Komplexbildner Hydrazin zugeführt wird.The process of claim 17, wherein hydrazine is added to the organic complexing agent.
EP10175409A 2010-09-06 2010-09-06 Fluid circuit for a power plant and method for chemical cleaning of same Withdrawn EP2426322A1 (en)

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EP10175409A EP2426322A1 (en) 2010-09-06 2010-09-06 Fluid circuit for a power plant and method for chemical cleaning of same
PCT/EP2011/064741 WO2012031913A1 (en) 2010-09-06 2011-08-26 Fluid circuit for a power plant, and method for chemically cleaning a fluid circuit

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107829102A (en) * 2017-12-20 2018-03-23 中国二冶集团有限公司 Circulating pickling device and method for carbon steel piping
CN109338388A (en) * 2018-12-27 2019-02-15 首钢水城钢铁(集团)赛德建设有限公司 A kind of circulating pipe pickling device and method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109762591B (en) * 2019-02-27 2024-03-22 北京赛福贝特能源技术服务有限公司 Chemical cleaning device for crude oil atmospheric and vacuum distillation system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1198693A (en) * 1966-08-02 1970-07-15 Beratherm A G Process for the Chemical Cleansing of Water and Steam Contacted Metal Surfaces.
EP0299166A1 (en) * 1987-07-17 1989-01-18 Mitsubishi Jukogyo Kabushiki Kaisha Method for removing scale on inner surfaces of boiler tube members
DE19843442C1 (en) * 1998-09-22 2000-03-02 Siemens Ag Steam boiler unit components cleaning arrangement e.g. for power station equipment
DE10238730A1 (en) * 2002-08-23 2004-03-04 Framatome Anp Gmbh Process for cleaning the steam generator of a pressurized water reactor
WO2008118450A1 (en) * 2007-03-27 2008-10-02 Boyle Energy Services & Technology, Inc Improved method and apparatus for commissioning power plants

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1198693A (en) * 1966-08-02 1970-07-15 Beratherm A G Process for the Chemical Cleansing of Water and Steam Contacted Metal Surfaces.
EP0299166A1 (en) * 1987-07-17 1989-01-18 Mitsubishi Jukogyo Kabushiki Kaisha Method for removing scale on inner surfaces of boiler tube members
DE19843442C1 (en) * 1998-09-22 2000-03-02 Siemens Ag Steam boiler unit components cleaning arrangement e.g. for power station equipment
DE10238730A1 (en) * 2002-08-23 2004-03-04 Framatome Anp Gmbh Process for cleaning the steam generator of a pressurized water reactor
WO2008118450A1 (en) * 2007-03-27 2008-10-02 Boyle Energy Services & Technology, Inc Improved method and apparatus for commissioning power plants

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107829102A (en) * 2017-12-20 2018-03-23 中国二冶集团有限公司 Circulating pickling device and method for carbon steel piping
CN109338388A (en) * 2018-12-27 2019-02-15 首钢水城钢铁(集团)赛德建设有限公司 A kind of circulating pipe pickling device and method
CN109338388B (en) * 2018-12-27 2020-11-27 首钢水城钢铁(集团)赛德建设有限公司 Circulating pipeline pickling device and method

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