EP0077255B1 - Verfahren und Einrichtung zum Entfernen von Schlamm an der Rohrplatte von Dampferzeugern - Google Patents

Verfahren und Einrichtung zum Entfernen von Schlamm an der Rohrplatte von Dampferzeugern Download PDF

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Publication number
EP0077255B1
EP0077255B1 EP82401808A EP82401808A EP0077255B1 EP 0077255 B1 EP0077255 B1 EP 0077255B1 EP 82401808 A EP82401808 A EP 82401808A EP 82401808 A EP82401808 A EP 82401808A EP 0077255 B1 EP0077255 B1 EP 0077255B1
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EP
European Patent Office
Prior art keywords
lance
tubes
plate
enclosure
tube
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.)
Expired
Application number
EP82401808A
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English (en)
French (fr)
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EP0077255A1 (de
Inventor
André Charamathieu
Jean Dessales
Bernard Lebouc
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Areva NP SAS
Orano DS Demantelement et Services SA
Original Assignee
Framatome SA
STMI Societe des Techniques en Milieu Ionisant SPL
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Publication of EP0077255A1 publication Critical patent/EP0077255A1/de
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Publication of EP0077255B1 publication Critical patent/EP0077255B1/de
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G15/00—Details
    • F28G15/04—Feeding and driving arrangements, e.g. power operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
    • F22B37/54—De-sludging or blow-down devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
    • F22B37/483—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers specially adapted for nuclear steam generators

Definitions

  • the subject of the invention is a method and a device for eliminating sludge on the tube plate of steam generators of the type comprising, in a cylindrical enclosure with vertical axis closed by the plate, a bundle of smooth parallel tubes connected to said plate. , distributed in layers and traversed by a primary fluid at high temperature.
  • the invention finds a particularly important application in the field of recirculating steam generators, in which the water separated from the steam at the outlet of the secondary circuits is brought back to the inlet at the same time as the drinking water, which causes the accumulation on the plate of sludge containing mainly magnetite, which in the long run forms an adherent and compact layer.
  • the lance can successively be introduced in one direction, to clean a first half of the tube plate, then in the other from a hole opposite the first to clean the second half.
  • a water circulation is organized at the periphery of the plate between two holes of the enclosure placed face to face. The flow introduced on one side is divided into two fractions which circulate on the periphery on either side of the water street and meet to exit the enclosure.
  • the jet which is directed upwards not only has no effect of pulling out sludge, but also causes runoff which can bring back towards the middle of the plate the sludge not immediately sucked in. the suburbs.
  • the streams of attack with the lance and sweeping can be antagonistic in certain zones and cause a local redeposition of the sludge removed.
  • this sludge takes, as soon as it is deposited, a consistency such that it becomes almost impossible to vacuum it without resuspending it.
  • the water pressure must be moderate (practically of the order of 150 bars) to avoid damaging the tubes by too violent jets. This pressure is often insufficient for uprooting, that is to say for attacking a consolidated and very adherent sludge deposit.
  • FR-A-2445 487 a method of the type according to which at least one lance is moved radially from the center of the tube plate, parallel to the tube plate and close to the latter, two jets are directed of cleaning liquid to the plate, from the end part of the lance and in fixed and symmetrical directions with respect to the direction of the sheets, and the cleaning liquid is simultaneously discharged from the periphery of the bundle of tubes.
  • the method as described in this document requires inserting the lance into the “water street located between the two arms of the same U-shaped tube, much wider than the interval between two common plies of tubes.
  • the jets are still under moderate pressure. And there is no interruption of the jets when passing in front of the tubes. This process therefore still has the drawbacks mentioned above.
  • the invention aims to provide a method of eliminating sludge of the type defined above, but meeting the requirements of the practice better than those previously known, in particular in that it ensures a more complete cleaning thanks to an effective attack and an circulation organized so as to avoid the return of sludges to areas already treated, and this by not using only simple means.
  • the invention proposes in particular a method of the type defined above, characterized in that the lance (and advantageously two lances) is moved symmetrically between two common plies of tubes, the jets are sent under high pressure, typically at least 200 bars, and the jets are interrupted when passing in front of the tubes.
  • the jets are interrupted when passing in front of the tubes, very high driving pressures can be used, allowing rapid stripping, without risking damaging the tubes: the latter can be very close to the lance, since there is no There is more to foresee the space necessary for the oscillation of this one and that they are no longer subjected to the action of the jets. They can even constitute guides for holding the lance. In a steam generator with U-tubes, the current spacing between layers of tubes will be sufficient for the passage of the lance which will therefore no longer be necessary to introduce via the water street.
  • the lances providing jets of fixed orientation used in the process according to the invention can be introduced by the holes of small diameter, called "eye holes", which are generally provided in the enclosure of the steam generator orthogonally to the fist holes or below, between the distribution plate and the tube plate.
  • the cleaning will generally be carried out in several successive passes, using different lances directing jets which strike the plate in areas increasingly distant from the lance or lances.
  • the sludge is gradually pushed back towards the periphery of the bundle where it is taken up and discharged.
  • a first solution consists in using four sections of piping distributed in two pairs. Each pair is introduced through a hole located 90 ° from the direction of movement of the lance or lances and each section is arranged at the periphery of the beam on a 90 ° arc. The four sections thus cover the entire peripheral space of the tube bundle. They are each connected to a suction member, which can in particular be a hydro-ejector.
  • a second solution consists in creating a one-way circulation of water throughout the peripheral space, by injection and aspiration using tubes passing through the enclosure at two opposite points.
  • a last solution which can moreover be used in combination with the first, consists in collecting the sludge using a vacuum device placed against the plate at the periphery thereof.
  • the invention also aims to provide a device for eliminating sludge which is both simple and effective, making it possible to implement the process defined above.
  • the invention provides a device comprising: at least one lance for spraying cleaning liquid which has an end portion provided with nozzles of fixed orientation, such that the nozzles direct oblique jets substantially symmetrical with respect to the direction d 'a sheet towards the tube plate; means for supplying water to the lance; a mechanism located outside the enclosure for radially moving the lance through a hole in the enclosure; and means for collecting and discharging the liquid loaded with sludge at the periphery of the tube bundle, characterized in that the lance has a thickness sufficiently small to pass between two layers of tubes and in that the supply means are designed to interrupt the supply of liquid under high pressure when the nozzles pass in front of the tubes (7).
  • the terminal part of the lance will advantageously consist of a head having a straight section of flat shape with two superposed nozzles, of a thickness such that it is inserted between two layers of tubes and the height of which is chosen to have a rigidity avoiding any significant bending in the vertical direction while allowing passage through a hole made through the enclosure.
  • the head can be pierced with a high hole directing a balancing jet upwards.
  • the steam generators of nuclear boilers are frequently placed inside a casemate intended for protection against projectiles in the event of an incident inside the general enclosure of the boiler and / or for biological protection.
  • the free space between the enclosure of the steam generator and the casemate is generally less than the length of lance to be introduced radially into the steam generator.
  • the lance will be formed so as to be deformable in plan while being rigid in the vertical direction in order to tolerate the necessary overhang.
  • the lance may include notches regularly distributed forming a toothing for receiving teeth of a drive mechanism located outside the enclosure and which can be associated with displacement measurement means and with a tube proximity detector carried by the head allowing precise positioning of the lance before actuation .
  • the steam generator comprises a pressure enclosure of cylindrical shape 1 closed at its lower part by a tubular plate 2 in which the end portions of U-shaped heat exchange tubes 7 are expanded and welded.
  • the enclosure extends under the plate by a dome delimiting a water box 3 separated by a vertical partition 4 in a compartment where the hot primary water coming from the reactor arrives by a tube and an outlet compartment from where the primary water escapes towards the reactor by a tubing 6. Between the two compartments, the primary water circulates in the hot branch, then the cold branch of the U-shaped tubes 7.
  • a secondary envelope 8 Between the bundle of U-shaped tubes 7 and the enclosure 1 is placed a secondary envelope 8.
  • the secondary envelope 8 ends above the tubular plate, leaving a space allowing the secondary water and the water. recirculation which descend through the annular space between the enclosure 1 and the casing 8 to supply the area occupied by the beam, immediately above the tube plate.
  • Spacer plates (not shown) pierced with holes for the passage of the tubes and the opening for the circulation of water and steam are arranged at regular intervals along the bundle and hold the tubes.
  • a distribution plate 11 having a central opening 12 is disposed above the tubular plate.
  • the hot and cold branches of the tubes are separated by a free diametrical zone 13, called “water street”, the width of which is determined by the maximum bending that can be given to the tubes 7. In this water street are placed spacers 14 and a continuous bleed ramp 15.
  • the cleaning device uses accesses provided in the envelope and which, in the steam generator illustrated, include two relatively large diameter holes 17, called “fist holes”, diametrically opposite, located opposite the water street and at the distribution plate 11.
  • Two smaller holes 16 usually called “eye holes and whose diameter is typically 50 mm, are aligned in a direction perpendicular to that of the fist holes, at a short distance from the tube plate 2 (typically 250 mm).
  • the enclosure 1 is surrounded by a casemate (not shown) whose role is notably to stop parts and debris thrown in the event of an incident.
  • the sludge removal device shown as an exemplary embodiment in Figure 1 can be viewed as comprising a sludge attack and suspension system and a collection system.
  • the attack system comprises, for the same operation, two lances 19 intended to be each introduced through an eye hole 16 and to be moved between two plies of tubes, that is to say in an interval whose width is typically of the order of 10 mm.
  • the lance 19 shown by way of example in FIGS. 2 to 5 comprises a guide and supply part 23 and a head 24 fixed to the part 23 by means eliminating the risk of loss of the head inside the generator .
  • the guide part designed so as to be flexible, comprises two superimposed tubes 27 and 28 (FIG. 3) connected by a central core pierced with holes and by two metal side walls 25 and 26.
  • Each side wall 25 or 26 consists of a thin sheet pierced with rectangular openings formed by cutting and folding inwards fins 32 and 33.
  • the core and the fins are coated with a coating of thermoplastic material 31 which also drowns the tubes.
  • the fins are of such length that they trap the central core 34.
  • the guide part 23 thus has regularly distributed openings constituting meshes of the movement mechanism which will be described later.
  • the head 24 is constituted by a metallic piece forming a water box, into which the tubes 27 and 28 open. In the rear part of this head are recesses for receiving tabs 42 and 43 secured to the side walls 25 and 26. Des pins allow to permanently secure the legs of the head.
  • the water box is provided with two cleaning nozzles constituted by orifices 38 drilled obliquely in thickened portions of the head and designed so as to provide jets inclined downwards in a substantially symmetrical manner.
  • a lance can be formed in this way having a thickness not exceeding 10 mm, that is to say the width of the ligament of the tubular plate between two layers of tubes 7, and a height of the order of 45 mm, smaller than the diameter of an eye hole. Due to its constitution, this lance, when it is supported by a fitting link outside the enclosure, has only an acceptable arrow when it is in its minimum projecting position inside . To reduce the bending forces exerted on it, one can provide, in the head, an orifice 40 directed upwards to give rise to a balancing jet.
  • the lance can be used with a mechanism of the kind shown in FIGS. 4 and 5, which gives it, at the exit of the enclosure, a curvature limiting the radial size to a value compatible with the space which remains between the casemate and the enclosure.
  • the lance can therefore remain very simple and be used without telescopic displacement or splicing of sections, which would moreover be difficult to implement given the small interval between two adjacent plies of tubes and the need to carry out these operations under control. of an operator in an area subject to significant radiation.
  • the lance head shown in section in FIG. 2A differs from that shown in FIG. 2 in that it does not comprise a single set of cleaning nozzles each placed on one side and having the same orientation, but several sets of nozzles.
  • the upper tube 27 feeds a first set of nozzles 38 whose orientation corresponds to that of the nozzles shown in FIG. 2.
  • the lower tube 28 feeds two sets of nozzles, having an inclination of 40 ° and 70 ° respectively on the horizontal, therefore corresponding to shots at a shorter distance.
  • the head shown in FIG. 2A can in particular be used to carry out sweeping of the loose sludge, under a lower pressure than during a preliminary stripping operation, carried out in several passes with heads with a single set of nozzles. But, as will be seen below, it is also possible to use a head of the kind shown in FIG. 2A to remove and expel the sludge by single passage of the lance, with an advance with mit steps, as will be seen below.
  • the variant embodiment of the lance shown in FIGS. 2B and 2C differs in particular from FIG. 2 in that it comprises three supply hoses which are extended by corresponding tubes up to a chamber 80 provided with a balancing orifice 40 directed upwards. Partitions 81 provided in the chamber separate the flows coming from the tubes 27 and 28 until near the end of the head.
  • the one shown in FIG. 2B intended for shooting at a short distance from the lance introduction plane, comprises two sets of nozzles 82, of the same orientation, the longitudinal spacing of which corresponds to the distance between two successive tubes of a same tablecloth.
  • On the head and the body of the lance may be provided engraved marks 83 for locating, the spacing of two successive marks corresponding to the interval between two tubes.
  • that of FIG. 2B makes it possible to provide a higher flow rate for removing the sludge.
  • a last head, used for a third pass may include nozzles having the orientation indicated in phantom in Figure 2D .
  • the mechanism shown in FIGS. 4 and 5, intended to push and pull the lance 19, is carried by a base 60 .
  • This base carries a guide assembly comprising two curved and parallel slides 61, between which the guide part 23 circulates by meshing on endless belts 62 notched on one side, the path of which is fixed by rollers 63.
  • the drive mechanism further comprises two drive assemblies placed on either side of the slides on the path of the lance 19. Each of these assemblies are constituted by a set of two belts 64 notched on both sides, meshing on one side with the guide part 23, on the other side, with drive pinions 65 coupled to a gearmotor 66 by the through a torque limiter 67 and a displacement measurement device 68 of any type.
  • the lance is rigid. It consists of several superimposed tubes, two in number in the illustrated case, connected from place to place by spacers 70.
  • the lance passes, at the outlet of the enclosure, a bender which, in the case illustrated in FIG. 7 consists of a series of bending rollers 71 carried by the base 60.
  • the drive means consist of a chain 72 fixed to the rear spacer 70 and driven on an endless path by a pinion 73.
  • position sensor 68 may be insufficiently precise, it will frequently be supplemented by optical means, using for example reference points 74 distributed along the lance (FIG. 6) or by electrical means. These can be formed by an eddy current sensor 75 located at the base of the head ( Figure 4), detecting the proximity of a tube.
  • the tubes are supplied with water by a flexible pipe 20 (FIG. 1) for connection with a remote pump unit (not shown).
  • This group may have a conventional constitution, except that it is provided with means for stopping the arrival of water in response in particular to a signal received from a device for detecting passage in front of the tubes, comprising the position sensor 68, and optionally, an additional optical or electrical sensor.
  • This group can moreover be provided to supply on demand one or the other of two pressures, one of which is very high (at least 200 bars and for example 300 bars) for the withdrawal and the other of which is lower for cleaning and suspending sludge.
  • the sludge collection and evacuation system comprises, in the embodiment shown in FIGS. 1 and 9, two low-pressure spraying ramps 21 introduced by the fist holes 17 above the distribution plate 11. These ramps supply water to the central part of the tube bundle and cause a flow directed towards the periphery.
  • the sludge is taken up by four sections of flexible tubing 22 pierced with suction holes 51 which each cover a quarter of the periphery. The four sections are each connected to a hydro-ejector 52, only one of which is shown in FIG. 9.
  • This hydro-ejector which can use the motor water also used for cleaning as a working fluid, makes it possible to achieve a depression of up to 8 meters d water, exerting a suction effect sufficient to entrain suspended sludge.
  • a stream of low pressure sweeping water can also be introduced into the water street using nozzles 53 placed in the fist hole 17.
  • This arrangement makes it possible to organize the circulation of water in a coherent manner and to avoid dead zones and the return of sludge to the regions already cleaned.
  • a set of lances is used, the nozzles of which are such that the water jets clean the zones A and repel the sludge towards the zone B.
  • a lance is used which cleans zone B and pumps the sludge towards zone C and so on with a slight overlapping of the zones.
  • a pass is made with a last lance having nozzles providing a jet which covers almost the entire tubular bundle (zone D in FIG. 10) and ensures by training the cleaning of the sludge which could have been deposited again during the first three passes.
  • the spears are first completely introduced. They are supplied with water under a pressure which can vary depending on whether one wishes to perform a stripping (which, in certain cases, may require a pressure of the order of 400 bars) or a simple cleaning. The lances are then moved so as to bring the nozzles 38 in front of the next ligament. During this translation, while the nozzles 38 pass in front of tubes, the jets are interrupted, which implies a stop of approximately 10 seconds in practice, the emission of jet in each intertubular space lasting approximately 30 seconds in general.
  • an injection and suction system which creates a circulation of water in the same direction throughout the peripheral space.
  • the sections are oriented so as to generate a circular flow in one direction and the pressures and flow rates used are chosen so that the current has a speed greater than 1.6 m per second. This avoids redeposition of suspended sludge.
  • the collection system is completed by ramps 21 for supplying water at low pressure, as in the previous case.
  • a return pipe laid flat on the periphery of the plate comprising a central suction chamber 54 of liquid charged with sludge, connected to means of suction (pump or hydro-ejector) and two chambers 55 and 56 for supplying compressed air, opening on either side of the inlet slot of the central chamber 54 (FIG. 12).
  • the chambers 55 and 56 communicate through calibrated orifices with the flat underside of the piping, intended to be applied to the tubular plate.
  • the compressed air leaving the chambers 55 and 56 resuspends the sludge which is entrained with the cleaning water by the central chamber 54.
  • the compressed air jets constitute a cushion of air for supporting the piping and thereby facilitate the recovery of sludge.
  • the operating sequence described below assumes that several successive passes are made using lances whose nozzles have an increasingly inclined orientation in the vertical. It is also possible to carry out cleaning in a single pass, by using a lance comprising a head of the type shown in FIG. 2A.
  • the lance is advanced according to a progression in pilgrim's step such that each ligament receives the jets coming from the head according to four successive sequences of feeding of the heads.
  • the progression can be represented by the following table where m represents the serial number of the ligament located closest to the water street, the columns correspond to the feeding sequences of the lance n ° 1 , 2 ... and the crosses indicate the ligaments which receive the jets.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cleaning In General (AREA)

Claims (10)

1. Verfahren zum Entfernen von Schlamm an der Rohrplatte (2) eines Dampferzeugers mit einem in einem zylinderförmigen, durch die Rohrplatte abgeschlossenen Behälter (1) mit vertikaler Achse angeordnetem Bündel paralleler, mit der Platte verbundener, in Reihen verteilter, von einem Primärfluid hoher Temperatur durchströmter Rohre, wonach mindestens ein Düsenrohr von der Mitte der Platte aus dicht an ihr entlang und parallel zu dieser radial bewegt wird, zwei Strahlen einer Reinigungsflüssigkeit vom Endbereich des Düsenrohrs (19) aus in festgelegte Richtungen und symmetrisch zur Richtung der Reihen auf die Platte gerichtet werden und die Reinigungsflüssigkeit gleichzeitig vom Rand des Bündels aus abgezogen wird, dadurch gekennzeichnet, daß das Düsenrohr zwischen zwei Rohrreihen bewegt wird, die Flüssigkeitsstrahlen unter hohem Druck, typischerweise mindestens 200 bar, abgegeben werden und die Flüssigkeitsstrahlen beim Passieren der Rohre (7) unterbrochen werden.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß mehrere aufeinanderfolgende Durchläufe durchgeführt werden, indem verschiedene, die Flüssigkeitsstrahlen lenkende Düsenrohre verwendet werden, wobei die Flüssigkeitsstrahlen die Platte in Bereichen beaufschlagen, die immer weiter von dem Düsenrohr entfernt sind.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Dampferzeuger U-förmige Rohre (7) aufweist, wobei die Kalt- und Warmwasserzweige der Rohre durch eine Wasserpassage voneinander getrennt sind und die Düsenrohre radial zwischen zwei Rohrreihen senkrecht zur Richtung der Wasserpassage (13) und in unmittelbarer Nähe der Rohrplatte verschoben werden.
4. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß gleichzeitig symmetrisch von der Mitte des Dampferzeugers aus zwei Düsenrohre so bewegt werden, daß die gesamte Rohrplatte überstrichen wird.
5. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die mit Schlamm beaufschlagte Flüssigkeit am Rand des Bündels gesammelt wird und diese in Sämmelrohre (22) abgeführt wird, die durch Öffnungen (17) aus dem Behälter (1) austreten, die zur Eintrittsöffnung (16) des Düsenrohrs oder jeden Düsenrohrs (19) senkrecht angeordnet sind.
6. Vorrichtung zum Entfernen von Schlamm an der Rohrplatte (2) eines Dampferzeugers mit einem im einem zylinderförmigen, durch die Rohrplatte abgeschlossenen Behälter (1) mit vertikaler Achse angeordnetem Bündel paralleler, mit der Platte verbundener, in Reihen verteilter, von einem Primärfluid hoher Temperatur durchströmter Rohre, mit mindestens einem Düsenrohr zum Verspritzen einer Reinigungsflüssigkeit mit einem Endbereich, der mit Spritzdüsen fester Ausrichtung versehen ist, so daß die Spritzdüsen die Strahlen schräg und etwa symmetrisch zur Richtung einer Rohrreihe auf die Rohrplatte richten, Wasserzufuhreinrichtungen für das Düsenrohr, einem außerhalb des Behälters angeordneten Mechanismus zum radialen Bewegen des Düsenrohrs durch eine Öffnung des Behälters und Einrichtungen zum Sammeln und Entfernen der mit Schlamm beaufschlagten Flüssigkeit am Rand des Rohrbündels, dadurch gekennzeichnet, daß das Düsenrohr hinreichend schmal ist, um zwischen zwei Rohrreihen passieren zu können und daß die Zufuhreinrichtungen so ausgelegt sind, daß sie die Versorgung mit Druckflüssigkeit unterbrechen, wenn die Spritzdüsen an den Rohren (7) vorbeigeführt werden.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß der Endbereich des Düsenrohrs aus einem Kopf mit gerader, flacher Querschnittsfläche mit mindestens zwei übereinander angeordneten seitlichen Spritzdüsen besteht, wobei der Kopf so breit ist, daß sich dieser zwischen zwei Rohrreihen einfügt, ohne sich drehen zu können und die Höhe des Düsenrohrs so gewählt ist, daß dieses eine Steifigkeit aufweist, die jedwede bemerkenswerte Verbiegung in senkrechter Richtung verhindert und den Durchgang durch eine in dem Behälter angebrachte Öffnung ermöglicht.
8. Vorrichtung nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß der Endbereich des Düsenrohrs mit einer nach oben gerichteten Öffnung versehen ist, um einen Ausgleichsstrahl zu den auf die Platte gerichteten Strahlen zu erzeugen.
9. Vorrichtung nach Anspruch 6, 7 oder 8, für einen Dampferzeuger, bei dem der außerhalb des Behälters im Bereich der Öffnungen zum Einführen des Düsenrohrs zur Verfügung stehende Platz kleiner ist, als die maximale Ausladung des Düsenrohrs im Inneren des Behälters, dadurch gekennzeichnet, daß das Düsenrohr in der Horizontalen verbiegbar und in Vertikalrichtung steif ausgelegt ist und dadurch, daß der Vortriebsmechanismus das Düsenrohr in der Horizontalen am Ausgang des Behälters krümmt.
10. Vorrichtung nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, daß das Düsenrohr oder jedes Düsenrohr einen Detektor, z. B. einen Wirbelstrom-Detektor, zum Erfassen der Nähe von Rohren aufweist.
EP82401808A 1981-10-06 1982-10-04 Verfahren und Einrichtung zum Entfernen von Schlamm an der Rohrplatte von Dampferzeugern Expired EP0077255B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8118760A FR2514108B1 (fr) 1981-10-06 1981-10-06 Procede et dispositif d'elimination des boues sur la plaque tubulaire des generateurs de vapeur
FR8118760 1981-10-06

Publications (2)

Publication Number Publication Date
EP0077255A1 EP0077255A1 (de) 1983-04-20
EP0077255B1 true EP0077255B1 (de) 1986-01-02

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EP82401808A Expired EP0077255B1 (de) 1981-10-06 1982-10-04 Verfahren und Einrichtung zum Entfernen von Schlamm an der Rohrplatte von Dampferzeugern

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Country Link
US (1) US4424769A (de)
EP (1) EP0077255B1 (de)
JP (1) JPS58127003A (de)
KR (1) KR880001503B1 (de)
CA (1) CA1190104A (de)
DE (1) DE3268322D1 (de)
ES (1) ES516093A0 (de)
FR (1) FR2514108B1 (de)
ZA (1) ZA826909B (de)

Families Citing this family (70)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3301536A1 (de) * 1983-01-19 1984-07-19 Kraftwerk Union AG, 4330 Mülheim Rohrgassen-manipulator
DE3202248A1 (de) * 1982-01-25 1983-08-04 Kraftwerk Union AG, 4330 Mülheim Rohrgassen-manipulator, spritzkopf und zugehoeriges spritzverfahren zum hochdruck-abschlaemmen von waermetauschern
FR2545582B1 (fr) * 1983-05-04 1985-08-30 Electricite De France Dispositif d'observation de la plaque tubulaire d'un generateur de vapeur
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ES8306244A1 (es) 1983-06-01
DE3268322D1 (en) 1986-02-13
JPS58127003A (ja) 1983-07-28
EP0077255A1 (de) 1983-04-20
FR2514108B1 (fr) 1986-06-13
JPS615043B2 (de) 1986-02-15
ES516093A0 (es) 1983-06-01
CA1190104A (en) 1985-07-09
FR2514108A1 (fr) 1983-04-08
KR840002088A (ko) 1984-06-11
ZA826909B (en) 1983-07-27
US4424769A (en) 1984-01-10
KR880001503B1 (ko) 1988-08-16

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