EP0043760B1 - Dampftrockneranlage für Dampferzeuger, insbesondere für Kernreaktor-Dampferzeuger - Google Patents

Dampftrockneranlage für Dampferzeuger, insbesondere für Kernreaktor-Dampferzeuger Download PDF

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Publication number
EP0043760B1
EP0043760B1 EP81401048A EP81401048A EP0043760B1 EP 0043760 B1 EP0043760 B1 EP 0043760B1 EP 81401048 A EP81401048 A EP 81401048A EP 81401048 A EP81401048 A EP 81401048A EP 0043760 B1 EP0043760 B1 EP 0043760B1
Authority
EP
European Patent Office
Prior art keywords
drying
steam
elements
series
drying unit
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
EP81401048A
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English (en)
French (fr)
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EP0043760A1 (de
Inventor
Claude Lavalerie
Christian Borrel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Areva NP SAS
Original Assignee
Framatome SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Framatome SA filed Critical Framatome SA
Priority to AT81401048T priority Critical patent/ATE5495T1/de
Publication of EP0043760A1 publication Critical patent/EP0043760A1/de
Application granted granted Critical
Publication of EP0043760B1 publication Critical patent/EP0043760B1/de
Expired legal-status Critical Current

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    • 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
    • F22B37/26—Steam-separating arrangements
    • F22B37/28—Steam-separating arrangements involving reversal of direction of flow
    • F22B37/286—Steam-separating arrangements involving reversal of direction of flow specially adapted for steam generators of nuclear power plants

Definitions

  • the present invention relates to a drying assembly for water-vapor separation equipment located in the upper part of a steam generator with natural circulation, that is to say downstream of the production of steam.
  • the drying assembly according to the invention is intended in particular to ensure the separation of steam in a steam generator associated with a nuclear reactor, although this application is in no way limiting.
  • steam generators with natural circulation include water-steam separation equipment so that the steam produced by the tube bundle (or by combustible elements in the case of boiling water reactors) is as dry as possible at the outlet. of the generator.
  • separation equipment comprises two assemblies arranged in series in the direction of flow of the vapor, these assemblies being distinguished essentially by the amount of water that they can capture; a first set, or set of primary separators, is intended to remove most of the water to be separated from steam, while the second set, or drying set, makes it possible to capture the few particles of water which can be still entrained by steam downstream of the set of primary separators.
  • Drying devices are already known which make it possible to finely dry the steam coming from the primary separators, in particular by the French patent published under the number 2,275,731.
  • This document describes a separation equipment in which the drying assembly (called in the second moisture separator patent) consists of two groups of herringbone separators arranged one above the other, the entry of the steam to be dried being made by the periphery and its exit by the central zone.
  • French utility certificate published under No. 2 254 092 describes a set of separators formed by drying frames constituting either a bed of several concentric crowns or a radiating structure, an arrangement of pipes being provided at the base of the frames for collecting and draining the collected water, such arrangements are suitable for boiling water reactors.
  • drying devices comprising drying elements arranged so as to constitute cells of triangular section. Such an arrangement is described in German Patent No. 2819346. This arrangement does not allow the drying elements to be arranged over the entire surface of the cross section of the steam generator but only over a peripheral zone.
  • the present invention proposes a new design of a drying assembly which eliminates these drawbacks by allowing, on the one hand a modular construction and, on the other hand, ensuring a large available exchange surface in the smallest possible overall volume.
  • the drying assembly according to the invention therefore makes it possible to achieve a gain in volume at the level of the generator pressure envelope, which makes it possible to more closely adapt its design to the conditions of optimal thermohydraulic operation. It also ensures a distribution and organization of the steam circulation which promotes a particularly efficient use of the section offered within the steam generator as well as the improvement of the operation and therefore of the separation efficiency.
  • the drying assembly of the invention comprises a plurality of drying elements, steam guiding means organizing the admission of wet steam into the drying elements and the outlet of the dry steam from the drying elements and the separate water collection devices associated with the drying elements.
  • the drying assembly according to the invention is distinguished in a characteristic manner by the fact that it has a modular structure, all the drying elements being identical and distributed in a symmetry of ternary revolution and in that, in a first series of drying elements, said elements are arranged radially and associated with steam guiding means which alternately form around of the axis of revolution, an outlet volume of dry steam from one element and an intake volume of wet steam into the next element, the intake volumes each occupying in a lower cross section of the assembly an area identical to that occupied by each of the outlet volumes in an upper cross section of the assembly.
  • the drying assembly of the invention may advantageously comprise one or more concentric series of identical drying elements arranged radially as has just been defined, and in addition one or more series of drying elements constituting an annular peripheral ring where the elements, of parallelepiped shape and preferably identical to the drying elements which they surround, are arranged along the sides of a polygonal shape, each extending from the end of a radial element to the following radial element of the same series.
  • the means for guiding the steam associated with the drying elements of the second series provide for each an intake volume located radially outside the element, between the latter and a cylindrical enclosure, and on the other hand an outlet volume located radially inside the element, while for the drying elements of the first series, the volumes of admission into an element and of vapor outlet of the element are distributed alternately around the axis of revolution of the assembly. This gives a very homogeneous distribution of the passage of steam through the drying elements over the entire section of the upper part of the generator.
  • each element of the second series forms with two elements of the first series a cell of triangular shape whose three sides are constituted respectively by the three drying elements.
  • each cell is advantageously divided by a partition isolating the drying elements from each other and comprising three vertical plates extending in a part of each of the bisector planes of the cell and fixed to each other along a contact axis in the center of the cell, so as to delimit there three equal compartments, and on the other hand three transverse plates comprising two lower plates closing the base two compartments respectively and an upper plate closing the top of the third compartment.
  • the best operating conditions are generally obtained when the cells are arranged in the drying assembly so that the drying element adjacent to one of the compartments closed by a lower plate constitutes an element of the peripheral crown.
  • the drying assembly is limited by drying elements defining a hexagon.
  • identical hexagons can be combined to occupy a larger overall cross-section.
  • the drying assembly comprises water collection devices opening out into conduits oriented parallel to the axis of symmetry arranged at the outer radial end of each of the elements of the first series, said conduits serving also for collecting separate water in the drying elements of the second series, and the guide means comprise an annular plate delimiting a volume of admission of wet steam into the drying elements of the peripheral ring and extending between a cylindrical outer enclosure and the top of each of the elements of the second series.
  • FIG 1 there is shown schematically at 1 the outer casing of a steam generator whose dome-shaped top has an orifice for the outlet of the steam produced.
  • 3 there is shown the steam production chamber housed in the lower part of the casing 1 and in which is installed the traditional bundle of tubes (not shown) in which a primary fluid circulates and which ensures the vaporization of the secondary fluid (namely water) contained in the chamber 3.
  • the steam escapes from the chamber 3 by passing through a water-steam separator 4 of conventional structure and ensuring the collection of most of the water entrained by the steam as well as his return to the bedroom.
  • drying assembly 6 may also contain fine suspended water droplets, droplets of which the drying assembly according to the invention, generally designated in 6, ensures collection and return by pipes E to the part generator.
  • the drying assembly 6 is therefore, for this purpose, located downstream of the separator 4 and the steam 8 leaving this assembly 6 has a humidity compatible with the proper functioning of the devices using this steam.
  • the volume of the generator located downstream of the drying assembly is isolated from the rest of the generator by a separator plate generally designated at 7 and whose structure which will be described in detail below is such that it forces the "wet" steam to pass through the drying assembly 6 before reaching the discharge orifice 2, which is located above the drying assembly, substantially on its axis.
  • the drying assembly consists of drying elements 9a and 9b of parallelepiped shape and all identical, associated with partitions which guide the steam circulating vertically, from the bottom to the top, through the drying elements.
  • the latter are distributed in a symmetry of ternary revolution around the axis of the assembly, so as to form a modular structure with six modules in the particular case shown.
  • the elements 9a six in number in the example considered, are arranged radially so as to form a radiating star centered on the axis of the enclosure.
  • the second series constitutes a peripheral ring-shaped ring around the first.
  • the drying elements 9b are arranged there, vertically like the first, each on one side of a polygonal section, here hexagonal, and extending between one end of a radial element and the end of the following radial element.
  • the drying elements have a conventional structure such as that which is shown in FIG. 6 by way of example, constituted by a rectangular peripheral frame 10 with a U-section open at 11 and 12 on its two large opposite faces and filled with a stack. strips or rafters 15 forming chicane passages 15a allowing the frame to pass through with steam. These strips are arranged vertically so that the water droplets which deposit on them can slide towards the base of the frame 9 in which is formed a drainage channel 14 situated under a perforated plate 13 supporting the strips 15.
  • the separator plate 7 has been shown in dashed lines in FIG. 5. It comprises an annular external part 16 to which the drying elements 9b of the peripheral ring are fixed, this external part 16 closing the gaps located between the envelope 1 of form cylindrical and the dryers that occupy a rectangular section, each on one side of the polygon.
  • the plate 7 also comprises a central part 17, connected to the part 16 by radial members 18 advantageously extending along the length of the dryers 9a to which they are fixed; the central part 17 ensures the closure of the top of the central space left free between the ends of the dryers 9a.
  • the attachment of the dryers to the plate 7 can optionally be supplemented by vertical frames B (see FIGS. 1 and 5) integral with the plate 7 and to which are fixed the faces of the dryers 9a by which the dry steam leaves the dryers to gain the space above the plate 7 as will be explained later.
  • each dryer 9b constitutes with two consecutive radial dryers 9a, a cell generally designated in 19 ( Figure 5), and having a general shape of equilateral triangle.
  • each cell 19 is divided by a partition whose role is to achieve the isolation of each dryer 9a or 9b from the others.
  • This partitioning comprises three vertical plates 20, 21 and 22, which extend respectively from the center of the cell along each of the bisectors of the angles at the top of the cell, these plates being joined together along their common contact line H (FIG. 5 ) and delimiting three equal compartments in the cell; the partitioning is completed by two lower triangular plates 23 and 24 and an upper triangular plate 25.
  • the lower plate 23 closes the lower base of the compartment adjacent to the peripheral dryer 9b and it is linked to the lower edge S thereof and to the lower edges of the vertical plates 20 and 22, while the lower plate 24 closes off the same way a compartment adjacent to one of the radial dryers 9a by being linked to the lower edge thereof and to the lower edges of the vertical plates 20 and 21 (see Figure 3).
  • the upper triangular plate 25, in turn, closes the upper part of the third compartment of the cell and it is linked to the upper edge R of the second radial dryer 9a and to the upper edges of the vertical plates 21 and 22. (FIG. 3).
  • the steam can have free access to the radial dryers 9a by the intake compartments delimited by the vertical plates 21 and 22 and closed at their tops by the upper plates 25.
  • the steam is therefore forced to pass through the dryers 9a according to the arrows F 3 (FIG. 4) and it leaves therefrom through the outlet compartments delimited by the vertical plates 20 and 21 closed at their base by the plate 24 but open at their top to allow the steam to rise according to the arrow F 4 in the direction of the discharge orifice 2.
  • the lower plates 23, 24 and upper 25 will be slightly inclined in order to facilitate the guiding of the vapor.
  • the contact axis of the three vertical plates of the partitioning, in H, then extends only over part of the height of the cell, in its middle part.
  • FIG. 4 thus shows a collecting duct E collecting the separated water in a radial drying element and two adjacent peripheral drying elements, therefore belonging to two different cells of the modular construction.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Beans For Foods Or Fodder (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Claims (8)

1. Dampftrocknungsanordnung mit einer Mehrzahl von Trocknungselementen von Parallelepipedform, von welchen jedem Element Dampf-Führungseinrichtungen zugeordnet sind, u. zw. vom Einlaß des feuchten Dampfes in das Element bis zu einer Sammeleinrichtung für das im Element abgetrennte Wasser, dadurch gekennzeichnet, daß die Anordnung im Baukasten- bzw. Modul-Prinzip aufgebaut ist, daß sie eine Reihe von radialen Trocknungselementen (9a) aufweist, die gemäß einer dreizähligen Rotationssymmetrie verteilt sind, und eine Reihe von Trocknungselementen (9b), die einen in Umfangsrichtung verlaufenden, ringförmigen Kranz um die erste Reihe von Trocknungselementen (9a) herum bilden, wobei sich jedes Element (9b) auf einer Seite einer polygonalen Form vom Ende eines radialen Elementes (9a) der ersten Reihe von Elementen zum darauffolgenden radialen Element hin erstreckt, und daß den Trocknungselementen (9a und 9b) Dampfführungseinrichtungen zugeordnet sind, welche abwechselnd die Abgabe einer Menge von trockenem Dampf aus einem Element und das Einbringen einer Menge von feuchtem Dampf in das darauffolgende Element (9a oder 9b) bewirken, wobei die eingebrachten Mengen in einem unteren Querschnitt der Anordnung jeweils eine Fläche einnehmen, welche gleich ist der Fläche, die jeweils von den ausgetragenen Mengen in einem oberen Querschnitt der Anordnung eingenommen wird.
2. Trocknungsanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die den Trocknungselementen (9b) der zweiten Reihe von Elementen zugeordneten Führungseinrichtungen für jedes der Elemente eine eingebrachte Menge schaffen, die radial außerhalb des Elementes zwischen diesem und einer zylindrischen Hülle gelegen ist und andererseits eine abgegebene Menge schaffen, die radial im Inneren des Elementes gelegen ist.
3. Trocknungsanordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß jedes Element (9b) der zweiten Reihe mit zwei Elementen (9a) der ersten Reihe eine Zelle (19) von dreieckiger Form bildet, deren drei Seiten jeweils von den drei Trocknungselementen gebildet sind.
4. Trocknungsanordnung nach Anspruch 3, dadurch gekennzeichnet, daß die Führungseinrichtungen für jede Zelle (19) eine innere Trennwandanordnung umfassen, die aus drei vertikalen Platten (20, 21, 22) besteht, die sich entlang einem Teil jeder der halbierenden Ebenen der Zelle erstrecken und aneinander an einer Berührungsachse H im Mittelpunkt der Zelle auf solche Weise befestigt sind, daß sie drei gleich große Kammern begrenzen, und daß die Führungseinrichtungen weiters drei Querplatten mit zwei unteren Platten (23 und 24), welche jeweils die Grundfläche von zwei Kammern verschließen und eine obere Platte (25) aufweisen, welche das obere Ende der dritten Kammer verschließt.
5. Trocknungsanordnung nach Anspruch 4, dadurch gekennzeichnet, daß die Zellen (19) in der Trocknungsanordnung so angeordnet sind, daß das an eine durch eine untere Platte (23) verschlossene Kammer angrenzende Trocknungselement ein Element (9b) des in Umfangsrichtung verlaufenden Kranzes bildet.
6. Trocknungsanordnung nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die Berührungszone H zwischen den vertikalen Platten (20, 21, 22) sich axial nur über einen mittleren Teil der Höhe der Zelle erstreckt und daß die Querplatten zwischen dieser Berührungszone und entweder der Basis oder dem oberen Ende des angrenzenden Trocknungselementes geneigt sind.
7. Trocknungsanordnung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Führungseinrichtungen eine ringförmige Plattform bzw. Scheibe umfassen, welche eine Einlaßmenge von feuchtem Dampf in den Trocknungselementen (9b) des in Umfangsrichtung verlaufenden Kranzes abgrenzt und sich zwischen einer äußeren zylindrischen Hülle und dem oberen Ende jedes der Elemente (9b) der zweiten Reihe erstreckt.
8. Trocknungsanlage nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Wassersammelvorrichtungen in Leitungen einmünden, welche parallel zur Symmetrieachse am radialen äußeren Ende jedes der Elemente (9a) der ersten Reihe angeordnet sind, wobei diese Leitungen gleichzeitig zum Sammeln des Wassers dienen, das in den Trocknungselementen (9b) der zweiten Reihe abgetrennt wird.
EP81401048A 1980-07-02 1981-06-30 Dampftrockneranlage für Dampferzeuger, insbesondere für Kernreaktor-Dampferzeuger Expired EP0043760B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81401048T ATE5495T1 (de) 1980-07-02 1981-06-30 Dampftrockneranlage fuer dampferzeuger, insbesondere fuer kernreaktor-dampferzeuger.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8014744A FR2486201A1 (fr) 1980-07-02 1980-07-02 Ensemble de sechage pour generateur de vapeur, destine notamment aux generateurs de vapeur de reacteurs nucleaires
FR8014744 1980-07-02

Publications (2)

Publication Number Publication Date
EP0043760A1 EP0043760A1 (de) 1982-01-13
EP0043760B1 true EP0043760B1 (de) 1983-11-30

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EP81401048A Expired EP0043760B1 (de) 1980-07-02 1981-06-30 Dampftrockneranlage für Dampferzeuger, insbesondere für Kernreaktor-Dampferzeuger

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Country Link
US (1) US4383500A (de)
EP (1) EP0043760B1 (de)
JP (1) JPS5743101A (de)
AT (1) ATE5495T1 (de)
BR (1) BR8103932A (de)
CA (1) CA1184323A (de)
DE (1) DE3161550D1 (de)
EG (1) EG14991A (de)
ES (1) ES8204831A1 (de)
FR (1) FR2486201A1 (de)
GR (1) GR75715B (de)
PT (1) PT73266B (de)
YU (1) YU41458B (de)
ZA (1) ZA813847B (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3301688C2 (de) * 1983-01-20 1985-04-18 Gottfried Bischoff Bau kompl. Gasreinigungs- und Wasserrückkühlanlagen GmbH & Co KG, 4300 Essen Waschturm für eine Anlage zur Entschwefelung von Rauchgas
US4902317A (en) * 1987-09-05 1990-02-20 Paul Gutermuth Purifying apparatus for gaseous fluids
DE102005056543B4 (de) * 2005-11-28 2016-01-14 Rea Plastik Tech Gmbh Tropfenabscheider für einen Gaswäscher
EP2025385A1 (de) * 2007-07-27 2009-02-18 Siemens Aktiengesellschaft Abscheider
US7686862B1 (en) * 2008-09-22 2010-03-30 Peerless Mfg. Co. Composite vane and method of manufacture
DE102009055932B4 (de) * 2009-11-27 2015-10-15 Munters Euroform Gmbh Windkraftrad
JP5470099B2 (ja) * 2010-03-05 2014-04-16 日立Ｇｅニュークリア・エナジー株式会社 沸騰水型原子力プラントおよび蒸気乾燥器

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US1992824A (en) * 1933-12-30 1935-02-26 Gen Electric Mercury boiler
US3412713A (en) * 1966-09-28 1968-11-26 Combustion Eng Steam generator incorporating floating tube sheet
US3370574A (en) * 1966-11-04 1968-02-27 Superior Comb Ind Inc Steam generating apparatus
CH475023A (de) * 1967-05-31 1969-07-15 Sulzer Ag Wasserabscheider zu einem Sattdampferzeuger, insbesondere für Atomkernreaktoranlagen
US3805496A (en) * 1970-02-02 1974-04-23 Westinghouse Electric Corp Formed vane elements for liquid-vapor separators
US3735569A (en) * 1971-09-07 1973-05-29 Combustion Eng Water-steam separator
FR2196702A5 (de) * 1972-08-21 1974-03-15 Babcock Atlantique Sa
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US3850599A (en) * 1973-09-24 1974-11-26 Combustion Eng Means for separating entrained liquid
FR2310793A1 (fr) * 1975-05-13 1976-12-10 Nikolaevich Artemov Perfectionnements apportes aux separateurs verticaux
SE414678B (sv) * 1977-05-16 1980-08-11 Asea Atom Ab Kokarreaktor

Also Published As

Publication number Publication date
ATE5495T1 (de) 1983-12-15
ES503588A0 (es) 1982-05-16
BR8103932A (pt) 1982-03-09
YU158281A (en) 1984-02-29
JPH037841B2 (de) 1991-02-04
FR2486201A1 (fr) 1982-01-08
EG14991A (en) 1985-12-31
EP0043760A1 (de) 1982-01-13
ZA813847B (en) 1982-07-28
US4383500A (en) 1983-05-17
JPS5743101A (en) 1982-03-11
PT73266B (fr) 1982-07-01
GR75715B (de) 1984-08-02
DE3161550D1 (en) 1984-01-05
YU41458B (en) 1987-06-30
FR2486201B1 (de) 1984-12-28
PT73266A (fr) 1981-07-01
ES8204831A1 (es) 1982-05-16
CA1184323A (fr) 1985-03-19

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