EP0051200B2 - Distribution system for a two-phase mixture, particularly a steam-water mixture in a once-through boiler - Google Patents

Distribution system for a two-phase mixture, particularly a steam-water mixture in a once-through boiler Download PDF

Info

Publication number
EP0051200B2
EP0051200B2 EP81108508A EP81108508A EP0051200B2 EP 0051200 B2 EP0051200 B2 EP 0051200B2 EP 81108508 A EP81108508 A EP 81108508A EP 81108508 A EP81108508 A EP 81108508A EP 0051200 B2 EP0051200 B2 EP 0051200B2
Authority
EP
European Patent Office
Prior art keywords
distributor
inlet pipe
baffle plate
drum
outlet pipes
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
EP81108508A
Other languages
German (de)
French (fr)
Other versions
EP0051200B1 (en
EP0051200A1 (en
Inventor
Egon Schneider
Wolfgang Dipl.-Ing. Köhler
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.)
Siemens AG
Original Assignee
Kraftwerk Union AG
Siemens AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6115577&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0051200(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Kraftwerk Union AG, Siemens AG filed Critical Kraftwerk Union AG
Priority to AT81108508T priority Critical patent/ATE4002T1/en
Publication of EP0051200A1 publication Critical patent/EP0051200A1/en
Publication of EP0051200B1 publication Critical patent/EP0051200B1/en
Application granted granted Critical
Publication of EP0051200B2 publication Critical patent/EP0051200B2/en
Expired legal-status Critical Current

Links

Images

Classifications

    • 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
    • F22B37/62—Component parts or details of steam boilers specially adapted for steam boilers of forced-flow type
    • F22B37/70—Arrangements for distributing water into water tubes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85938—Non-valved flow dividers

Definitions

  • the invention relates to a distributor for water-steam mixtures in a once-through boiler, with a distributor drum into which an inlet pipe leads and from which several outlet pipes arranged at an angle to the direction of the inlet pipe start.
  • Such a distributor is known from FR-A-1 419 832.
  • Such distributors are also provided, for example, between different boiler areas, where after a first heating in relatively large pipe cross sections, a transfer to superheater areas with pipes of larger numbers but smaller cross sections takes place.
  • the distribution on the drain pipes should be as even as possible to avoid negative effects, for example overheating in weakly loaded boiler areas. So far, this task has not been completely satisfactorily achieved.
  • the distributor drum has a flat baffle plate which is perpendicular to the direction of the inlet pipe and whose edge is symmetrical to the longitudinal axis of the inlet pipe and to the mouths of the outlet pipes and leads to the outlet pipes at an angle of more than 135 °, so that the flow reaches the drain pipes without any further disturbance.
  • the distribution is evened out in that the liquid component emerging from the inlet pipe, irrespective of its distribution over the pipe cross-section, runs evenly on all sides from the stagnation point by changing the direction on the flat baffle plate.
  • the liquid component On the edge leading to the drain pipes symmetrically and smoothly in the invention, the liquid component then continues to flow without disturbance, so that the uniformity is maintained regardless of irregularities in the flow in the inlet pipe and the drain pipes in the same way, i.e. H. with equal proportions of liquid and vaporous medium.
  • baffle plate is a circular disc which is arranged in a rotationally symmetrical distributor drum opposite the cylindrical feed pipe.
  • the baffle plate it is also conceivable to design the baffle plate as a regular polygon with relatively few drain pipes, in the corners of which the drain pipes lie.
  • the edge leading smoothly to the drain pipes should prevent the liquid component evenly distributed on the baffle plate by the deflection from becoming uneven again due to disturbances, for example corners at the edge.
  • the edge can lead obliquely, in particular curved, to the drain pipes.
  • corners with walls that run at an acute angle to one another should be avoided, while corners with obtuse angles of, for example, more than 135 ° are permissible because they practically no longer interfere.
  • a rotationally symmetrical arrangement of the distributor is particularly advantageous for large raw reams with eight or more tubes on a distributor drum.
  • the diameter of the circular disk should be larger than the diameter of the inlet pipe, for example 1.2 to 2 times.
  • the same dimensions are chosen accordingly.
  • the distance of the baffle plate from the mouth of the inlet pipe must be at least so large that the baffle plate has no blocking effect with an undesirably high flow resistance. It is a good value, for example, if the distance is approximately as large as the diameter of the inlet pipe.
  • the invention can be carried out in such a way that the baffle plate and the outlet pipes are arranged in one half and the inlet pipe in the other half of the ball and that the two halves are flanged together or are welded.
  • the side of the baffle plate facing away from the inlet pipe can be adapted to the spherical shape of the distributor drum in order to obtain a uniform support.
  • the plate and the distributor drum which may be stressed by vibrations, as will be explained in more detail later.
  • the baffle plate is formed by a flat wall area of the distributor drum. So here the baffle plate is not an additional component but a specially shaped area of the distributor drum itself. This region can be an integral part of the wall of the distributor drum, which is manufactured as a forged piece, for example. However, it can also be formed by a welded-in floor with a special material if required.
  • the distributor 1 belongs to a once-through boiler with fossil fueling. It sits between a first heating zone charged with feed water and a second heating zone in which further evaporation and / or overheating takes place. For this reason, a water-steam mixture comes from the first heating zone at a pressure of, for example, 90 to 160 bar in an inlet pipe 2 in the direction of the arrow 3.
  • the water flows above all at a speed of, for example, 2 to 6 m / s along the wall of the pipe 2, while the steam at a speed of 15 to 20 m / s primarily in the middle of the circular pipe cross-section.
  • the tube 2 has a diameter d of, for example, 360 mm. It protrudes by approximately this diameter into a spherical distributor drum 4, which is welded together at 7 from two hemispheres 5 and 6.
  • the ball diameter is 700 mm.
  • a flat circular disk is arranged as a baffle plate 10 in a rotationally symmetrical manner with respect to the axis 8 of the inlet pipe 2 shown in dash-dotted lines, which also passes through the center of the ball 4.
  • the baffle plate 10 is exactly opposite the inlet line 2. Their plane forms a right angle with the vertical axis 3 of the inlet pipe 2, the axis 8 passing through the center of the circle of the baffle plate 10.
  • the edge 12 of the baffle plate is welded to the wall of the underside 6 of the drum 4, a smooth transition being created.
  • the angle 14 which is formed on the weld seam 13 is, at 150 °, far greater than an acute angle. This results in a smooth transition from the baffle plate 10 to drain pipes 15, which are arranged symmetrically around the circumference on the lower part 6 of the drum, as shown in FIG. 2.
  • the diameter D of the baffle plate 10, at 460 mm, is more than 1/4 larger than the diameter d of the inlet pipe 2. This ensures that an expanding beam, which is indicated by the arrows 16, also has one for the uniform one Spread sufficient distance from the edge 12 hits the baffle plate 10.
  • the diameter D can also be chosen larger, for example 2d.
  • the distance A of the baffle plate 10 from the mouth 18 of the inlet pipe 2 is suitably 1 to 4 times the diameter d.
  • the value is not critical and can also be selected to be smaller, in particular at low flow velocities, for example 0.8d, if this does not cause undesired throttling of the flow.
  • the water of the two-phase mixture supplied asymmetrically in the inlet pipe 2 due to pipe elbows or for other reasons is distributed uniformly over the flat surface of the baffle plate 10. This also results in an even distribution between the eight drain pipes 15 distributed around the edge of the lower part 6. This means that the other areas of a superheater zone (not shown) in the boiler connected to the drain pipes 15 are evenly supplied with liquid and steam in the desired manner, such as is represented by the arrows 19. This prevents local overheating there.
  • FIG. 1 Another embodiment of the invention, in which the plate opposite the inlet pipe 2 at right angles and symmetrically is formed by the wall of the distributor drum 4 itself, can be thought of as omitting the spherical region 20 below the baffle plate 10.
  • the side of the baffle plate 10 facing away from the tube 2 can also be adapted to the spherical shape of the half 6 with the hatched area 21.
  • baffle plate 10 can, however, also be designed and arranged in such a way that its bulged edge extends directly to the drain pipes 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Manufacture Of Tobacco Products (AREA)

Abstract

Distributor for two-phase mixtures, including a distributor drum, a feed tube leading into the distributor drum in a given direction, a plurality of outlet tubes leading from the distributor drum at an angle to the given direction, and a flat baffle plate being disposed in the distributor drum at a right angle to the given direction, the baffle plate having an edge leading symmetrically and smoothly to the outlet tubes.

Description

Die Erfindung betrifft einen Verteiler für Wasser-Dampf-Mischungen in ZwangsdurchlaufkesseIn, mit einer Verteilertrommel, in die ein Zulaufrohr führt, und von der mehrere unter einem winkel zur Richtung des Zulaufrohres angeordnete Ablaufrohre ausgehen.The invention relates to a distributor for water-steam mixtures in a once-through boiler, with a distributor drum into which an inlet pipe leads and from which several outlet pipes arranged at an angle to the direction of the inlet pipe start.

Ein solcher Verteiler ist aus der FR-A-1 419 832 bekannt.Such a distributor is known from FR-A-1 419 832.

Solche Verteiler sind zum Beispiel auch zwischen verschiedenen Kesselbereichen vorgesehen, wo nach einer ersten Aufheizung in verhältnismäßig großen Rohrquerschnitten eine Überleitung zu Überhitzerbereichen mit Rohren größerer Zahl aber kleinerer Querschnitte erfolgt. Die Aufteilung auf die Ablaufrohre soll dabei möglichst gleichmäßig sein, um negative Auswirkungen, zum Beispiel eine Überhitzung in schwach beaufschlagten Kesselbereichen zu vermeiden. Diese Aufgabe ist bisher nicht voll zufriedenstellend gelöst.Such distributors are also provided, for example, between different boiler areas, where after a first heating in relatively large pipe cross sections, a transfer to superheater areas with pipes of larger numbers but smaller cross sections takes place. The distribution on the drain pipes should be as even as possible to avoid negative effects, for example overheating in weakly loaded boiler areas. So far, this task has not been completely satisfactorily achieved.

Gemäß der Erfindung ist vorgesehen, daß die Verteilertrommel eine ebene Prallplatte aufweist, die rechtwinklig zur Richtung des Zulaufrohres liegt und deren Rand symmetrisch zur Längsachse des Zulaufrohres und zu den Einmündungen der Ablaufrohre ist und unter einem Winkel von mehr als 135° zu den Ablaufrohren führt, so daß die Strömung ohne erneute Störung in die Ablaufrohre gelangt.According to the invention it is provided that the distributor drum has a flat baffle plate which is perpendicular to the direction of the inlet pipe and whose edge is symmetrical to the longitudinal axis of the inlet pipe and to the mouths of the outlet pipes and leads to the outlet pipes at an angle of more than 135 °, so that the flow reaches the drain pipes without any further disturbance.

Mit einer solchen Prallplatte wird eine Vergleichmäßigung der Verteilung dadurch erreicht, daß die aus dem Zulaufrohr austretende flüssige Komponente unabhängig von ihrer Verteilung über den Rohrquerschnitt durch die Richtungsänderung auf der ebenen Prallplatte vom Staupunkt gleichmäßig nach allen Seiten verläuft. Auf dem bei der Erfindung symmetrisch und glatt zu den Ablaufrohren führenden Rand strömt die flüssige Komponente dann ohne Störung weiter, so daß die Vergleichmäßigung unabhängig von Ungleichmäßigkeiten der Strömung im Zulaufrohr erhalten bleibt und die Ablaufrohre in gleicher Weise, d. h. mit gleichen Anteilen von flüssigem und dampfförmigem Medium beaufschlagt werden.With such a baffle plate, the distribution is evened out in that the liquid component emerging from the inlet pipe, irrespective of its distribution over the pipe cross-section, runs evenly on all sides from the stagnation point by changing the direction on the flat baffle plate. On the edge leading to the drain pipes symmetrically and smoothly in the invention, the liquid component then continues to flow without disturbance, so that the uniformity is maintained regardless of irregularities in the flow in the inlet pipe and the drain pipes in the same way, i.e. H. with equal proportions of liquid and vaporous medium.

Zur Verteilung der strömenden Gasflüssigkeitsmischung eines Kältemittels in Kühlanlagen ist es zwar aus der DE-A-2 232 074 bekannt, daß eine feste Platte am Zulaufrohr gegenüberstahend angeordnet wird. Die Ablaufrohre sind jedoch parallelachsig zu dem Zulaufrohr auf der Rückseite dieser Platte vorgesehen, und die Mischung muß zu den Ablaufrohren einen Spalt zwischen der Platte und dem diese umgebenden Außenrand der Verteilerkammer passieren. Die Homogenität des Strömungsgemisches soll also offenbar durch den engen Spalt zwischem dem Rand der Platte und der Außenwand sichergestellt sein.For the distribution of the flowing gas-liquid mixture of a refrigerant in cooling systems, it is known from DE-A-2 232 074 that a fixed plate is arranged opposite one another on the inlet pipe. However, the drain pipes are provided parallel to the inlet pipe on the back of this plate, and the mixture must pass a gap between the plate and the surrounding outer edge of the distribution chamber to the drain pipes. The homogeneity of the flow mixture should obviously be ensured by the narrow gap between the edge of the plate and the outer wall.

Auch bei einer aus der FR-A-1 505 376 bekannten Verteilereinrichtung für hochviskose Kunststoffe, wie Nylon, fehlt die Ausnutzung des Staudruckes einer auf eine rechtwinklige Ebene auftreffenden Flüssigkeit. Dort ist vielmehr daran gedacht, den Verteiler mit dem Kunststoff vollständig gefüllt zu halten und durch eine Verengung der Ablaufquerschnitte Totzonen zu vermeiden, in denen der an sich homogene Kunststoff zum Stillstand kommen könnte, so daß sich seine Konsistenz mit der Zeit ändert.Also in a distribution device for highly viscous plastics, such as nylon, known from FR-A-1 505 376, the back pressure of a liquid hitting a rectangular plane is not used. Rather, there is thought to keep the distributor completely filled with the plastic and to avoid dead zones by narrowing the drain cross-sections, in which the homogeneous plastic could come to a standstill, so that its consistency changes with time.

Die symmetrische Anordnung des Randes in bezug auf die Ablaufrohre ergibt sich in optimaler Weise, wenn die Prallplatte eine Kreisscheibe ist, die in einer rotationssymmetrischen Verteilertrommel gegenüber dem zylindrischen Zulaufrohr angeordnet ist. Es ist aber im Prinzip auch denkbar, bei verhältnismässig wenigen Ablaufrohren die Prallplatte als regelmässiges Polygon auszubilden, in dessen Ecken die Ablaufrohre liegen.The symmetrical arrangement of the edge with respect to the drain pipes results in an optimal manner if the baffle plate is a circular disc which is arranged in a rotationally symmetrical distributor drum opposite the cylindrical feed pipe. In principle, however, it is also conceivable to design the baffle plate as a regular polygon with relatively few drain pipes, in the corners of which the drain pipes lie.

Der glatt zu den Ablaufrohren führende Rand soll vermeiden, dass die an der Prallplatte durch die Umlenkung gleichmässig verteilte flussige Komponente durch Störungen, zum Beispiel Ecken am Rand wieder ungleichmässig wird. Zu diesem Zweck kann der Rand schräg, insbesondere gekrümmt zu den Ablaufrohren führen. Jedenfalls sollen Ecken mit spitzwinklig zueinander verlaufenden Wänden vermieden werden, während Ecken mit stumpfen Winkeln von zum Beispiel mehr als 135° zulässig sind, weil sie praktisch nicht mehr stören.The edge leading smoothly to the drain pipes should prevent the liquid component evenly distributed on the baffle plate by the deflection from becoming uneven again due to disturbances, for example corners at the edge. For this purpose, the edge can lead obliquely, in particular curved, to the drain pipes. In any case, corners with walls that run at an acute angle to one another should be avoided, while corners with obtuse angles of, for example, more than 135 ° are permissible because they practically no longer interfere.

Wie schon gesagt, ist eine rotationssymmetrische Anordnung des Verteilers besonders für grosse Rohdahlen mit acht oder mehr Rohren an einer Verteilertrommel günstig. Hierbei soll der Durchmesser der Kreisscheibe grösser als der Durchmesser des Zulaufrohres sein, zum Beispiel das 1,2 bis 2fache betragen. Für nichtrotationssymmetrische Anordnungen wählt man sinngemäss gleiche Abmessungen.As already mentioned, a rotationally symmetrical arrangement of the distributor is particularly advantageous for large raw reams with eight or more tubes on a distributor drum. Here, the diameter of the circular disk should be larger than the diameter of the inlet pipe, for example 1.2 to 2 times. For non-rotationally symmetrical arrangements, the same dimensions are chosen accordingly.

Der Abstand der Prallplatte von der Mündung des Zulaufrohres muss mindestens so gross sein, dass die Prallplatte keine Stauwirkung mit einem unerwünscht grossen Strömungswiderstand ausübt. Ein günstiger Wert ist es zum Beispiel, wenn der Abstand etwa so gross wie der Durchmesser des Zulaufrohres ist.The distance of the baffle plate from the mouth of the inlet pipe must be at least so large that the baffle plate has no blocking effect with an undesirably high flow resistance. It is a good value, for example, if the distance is approximately as large as the diameter of the inlet pipe.

Für den Fall einer kugelförmigen Verteilertrommel, die im Hinblick auf Wärmebeanspruchungen besonders günstig ist, kann man die Erfindung so ausführen, dass die Prallplatte und die Ablaufrohre in der einen Hälfte und das Zulaufrohr in der anderen Hälfte der Kugel angeordnet sind und dass die beiden Hälften zusammengeflanscht oder verschweißt sind. Dabei kann die dem Zulaufrohr abgekehrte Seite der Prallplatte der Kugelform der Verteilertrommel angepasst sein, um eine gleichmässige Auflage zu erhalten. Es sind aber auch andere günstige Konstruktionen für die unter Umständen durch Schwingungen beanspruchte Platte und der Verteilertrommel denkbar, wie später noch näher erläutert wird.In the case of a spherical distributor drum, which is particularly favorable with regard to thermal stresses, the invention can be carried out in such a way that the baffle plate and the outlet pipes are arranged in one half and the inlet pipe in the other half of the ball and that the two halves are flanged together or are welded. The side of the baffle plate facing away from the inlet pipe can be adapted to the spherical shape of the distributor drum in order to obtain a uniform support. However, other favorable constructions are also conceivable for the plate and the distributor drum, which may be stressed by vibrations, as will be explained in more detail later.

Eine Ausführungsform der Erfindung besteht darin, dass die Prallplatte von einem ebenen Wandbereich der Verteilertrommel gebildet wird. Hier ist also die Prallplatte kein zusätzliches Bauteil sondern ein besonders geformter Bereich der Verteilertrommel selbst. Dieser Bereich kann integraler Bestandteil der Wandung der zum Beispiel als Schmiedestück hergestellten Verteilertrommel sein. Er kann aber auch durch einen eingeschweissten Boden mit einem bei Bedarf besonderen Werkstoff gebildet werden.One embodiment of the invention is that the baffle plate is formed by a flat wall area of the distributor drum. So here the baffle plate is not an additional component but a specially shaped area of the distributor drum itself. This region can be an integral part of the wall of the distributor drum, which is manufactured as a forged piece, for example. However, it can also be formed by a welded-in floor with a special material if required.

Zur näheren Erläuterung der Erfindung wird anhand der beiliegenden Zeichnung ein Ausführungsbeispiel beschrieben, das in Fig. 1 in einem Vertikal- und in Fig. 2 in einem Horizontalschnitt dargestellt ist.For a more detailed explanation of the invention, an embodiment is described with reference to the accompanying drawing, which is shown in Fig. 1 in a vertical and in Fig. 2 in a horizontal section.

Der Verteiler 1 gehört zu einem Zwangsdurchlaufkessel mit fossiler Befeuerung. Er sitzt zwischen einer mit Speisewasser beaufschlagten ersten Heizzone und einer zweiten Heizzone, in der eine weitere Verdampfung und/oder Überhitzung stattfindet. Deshalb kommt aus der ersten Heizzone ein Wasser-Dampf-Gemisch bei einem Druck von zum Beispiel 90 bis 160 bar in einem Zulaufrohr 2 in Richtung des Pfeiles 3. Dabei strömt das Wasser mit einer Geschwindigkeit von zum Beispiel 2 bis 6 m/s vor allem an der Wand des Rohres 2 entlang, während der Dampf mit einer Geschwindigkeit von 15 bis 20 m/s in erster Linie in der Mitte des kreisformgien Rohrquerschnitts verläurt.The distributor 1 belongs to a once-through boiler with fossil fueling. It sits between a first heating zone charged with feed water and a second heating zone in which further evaporation and / or overheating takes place. For this reason, a water-steam mixture comes from the first heating zone at a pressure of, for example, 90 to 160 bar in an inlet pipe 2 in the direction of the arrow 3. The water flows above all at a speed of, for example, 2 to 6 m / s along the wall of the pipe 2, while the steam at a speed of 15 to 20 m / s primarily in the middle of the circular pipe cross-section.

Das Rohr 2 hat einen Durchmesser d von zum Beispiel 360 mm. Es ragt um etwa diesen Durchmesser in eine kugelförmige Verteilertrommel 4, die aus zwei Halbkugeln 5 und 6 bei 7 zusammengeschweißt ist. Der Kugeldurchmesser beträgt 700 mm.The tube 2 has a diameter d of, for example, 360 mm. It protrudes by approximately this diameter into a spherical distributor drum 4, which is welded together at 7 from two hemispheres 5 and 6. The ball diameter is 700 mm.

In der Verteilertrommel 4 ist rotationssymmetrisch zu der strichpunktiert dargestellten Achse 8 des Zulaufrohres 2, die auch durch den Mittelpunkt der Kugel 4 geht, eine ebene Kreisscheibe als Prallplatte 10 angeordnet. Die Prallplatte 10 liegt der Zulaufleitung 2 genau gegenüber. Ihre Ebene bildet mit der vertikalen Achse 3 des Zulaufrohres 2 einen rechten Winkel, wobei die Achse 8 durch den Mittelpunkt des Kreises der Prallplatte 10 geht.In the distributor drum 4, a flat circular disk is arranged as a baffle plate 10 in a rotationally symmetrical manner with respect to the axis 8 of the inlet pipe 2 shown in dash-dotted lines, which also passes through the center of the ball 4. The baffle plate 10 is exactly opposite the inlet line 2. Their plane forms a right angle with the vertical axis 3 of the inlet pipe 2, the axis 8 passing through the center of the circle of the baffle plate 10.

Der Rand 12 der Prallplatte ist mit der Wand der Unterseite 6 der Trommel 4 verschweisst, wobei ein glatter Übergang geschaffen ist. Jedenfalls ist der an der Schweissnaht 13 entstehende Winkel 14 mit 150° weit grösser als ein spitzer Winkel. Dadurch ergibt sich ein glatter Übergang von der Prallplatte 10 zu Ablaufrohren 15, die am Unterteil 6 der Trommel symmetrisch um den Umfang verteilt angeordnet sind, wie die Fig. 2 zeigt.The edge 12 of the baffle plate is welded to the wall of the underside 6 of the drum 4, a smooth transition being created. In any case, the angle 14 which is formed on the weld seam 13 is, at 150 °, far greater than an acute angle. This results in a smooth transition from the baffle plate 10 to drain pipes 15, which are arranged symmetrically around the circumference on the lower part 6 of the drum, as shown in FIG. 2.

Der Durchmesser D der Prallplatte 10 ist mit 460 mm um mehr als 1/4 grösser als der Durchmesser d des Zulaufrohres 2. Damit wird erreicht, dass auch ein sich aufweitender Strahl, der durch die Pfeile 16 angedeutet ist, noch mit einem für die gleichmässige Ausbreitung ausreichenden Abstand vom Rand 12 auf die Prallplatte 10 trifft. Zu diesem Zweck kann der Durchmesser D auch grösser, zum Beispiel 2d, gewählt werden.The diameter D of the baffle plate 10, at 460 mm, is more than 1/4 larger than the diameter d of the inlet pipe 2. This ensures that an expanding beam, which is indicated by the arrows 16, also has one for the uniform one Spread sufficient distance from the edge 12 hits the baffle plate 10. For this purpose, the diameter D can also be chosen larger, for example 2d.

Der Abstand A der Prallplatte 10 von der Mündung 18 des Zulaufrohres 2 beträgt zweckmässig das 1 bis 4fache des Durchmessers d. Der Wert ist jedoch nicht kritisch und kann besonders bei geringen Strömungsgeschwindigkeiten auch kleiner gewählt werden, zum Beispiel 0,8d, wenn damit keine unerwünschte Drosselung der Strömung verursacht wird.The distance A of the baffle plate 10 from the mouth 18 of the inlet pipe 2 is suitably 1 to 4 times the diameter d. However, the value is not critical and can also be selected to be smaller, in particular at low flow velocities, for example 0.8d, if this does not cause undesired throttling of the flow.

Mit der erfindungsgemässen Prallplatte 10 wird das aufgrund von Rohrkrümmern oder aus anderen Gründen unsymmetrisch im Zulaufrohr 2 zugeführte Wasser des Zweiphasengemisches gleichmässig über die ebene Fläche der Prallplatte 10 verteilt. Damit ergibt sich auch eine gleichmässige Aufteilung auf die acht um den Rand des Unterteils 6 verteilten Ablaufrohre 15. Dies bedeutet, dass die mit den Ablaufrohren 15 angeschlossenen weiteren Bereiche einer nicht dargestellten Überhitzerzone im Kessel in gewünschter Weise gleichmässig mit Flüssigkeit und Dampf beaufschlagt werden, wie durch die Pfeile 19 dargestellt ist. Damit werden dort örtliche Überhitzungen vermieden.With the baffle plate 10 according to the invention, the water of the two-phase mixture supplied asymmetrically in the inlet pipe 2 due to pipe elbows or for other reasons is distributed uniformly over the flat surface of the baffle plate 10. This also results in an even distribution between the eight drain pipes 15 distributed around the edge of the lower part 6. This means that the other areas of a superheater zone (not shown) in the boiler connected to the drain pipes 15 are evenly supplied with liquid and steam in the desired manner, such as is represented by the arrows 19. This prevents local overheating there.

Eine andere Ausführungsform der Erfindung, bei der die dem Zulaufrohr 2 rechtwinklig und symmetrisch gegenüberliegende Platte von der Wand der Verteilertrommel 4 selbst gebildet ist, kann man sich so vorstellen, dass der Kugelbereich 20 unterhalb der Prallplatte 10 entfällt. Andererseits kann die dem Rohr 2 abgewandte Seite der Prallplatte 10 mit dem gestrichelt schraffierten Bereich 21 auch der Kugelform der Hälfte 6 angepasst werden.Another embodiment of the invention, in which the plate opposite the inlet pipe 2 at right angles and symmetrically is formed by the wall of the distributor drum 4 itself, can be thought of as omitting the spherical region 20 below the baffle plate 10. On the other hand, the side of the baffle plate 10 facing away from the tube 2 can also be adapted to the spherical shape of the half 6 with the hatched area 21.

Bei den Ausführungsbeispielen liegt zwischen dem Rand 12 und den Ablaufrohren 15 ein kurzes Stück der unteren Kugelhälfte 6. Die Prallpratte 10 kann aber auch so ausgebildet und angeordnet sein, dass ihr gegebenfalls aufgewölbter Rand bis unmittelbar zu den Ablaufrohren 15 reicht.In the exemplary embodiments, there is a short piece of the lower half of the ball 6 between the edge 12 and the drain pipes 15. The baffle plate 10 can, however, also be designed and arranged in such a way that its bulged edge extends directly to the drain pipes 15.

Claims (7)

1. A distributor (1) for water-steam mixtures in forced-flow boilers, comprising a distributor drum (4) into which an inlet pipe (2) leads and from which emerge a plurality of outlet pipes (15) arranged at an angle to the direction of the inlet pipe (2), characterised in that the distributor drum (4) is provided with a planar baffle plate (10) which is arranged at right angles to the direction of the inlet pipe (2) and the edge (12) of which is symmetrical to the longitudinal axis (8) of the inlet pipe (2) and to the mouths of the outlet pipes (15) and leads to the outlet pipes (15) at an angle of more than 135° so that the flow reaches the outlet pipes (15) without renewed disturbance.
2. A distributor as claimed in Claim 1, characterised in that the baffle plate (10) is a circular disc which is arranged in an axially symmetrical distributor drum (4) opposite to the cylindrical inlet pipe (2).
3. A distributor as claimed in Claim 2, characterised in that the diameter (D) of the circular disc (10) is greater than the diameter (d) of the inlet pipe (2).
4. A distributor as claimed in Claim 2 or Claim 3, characterised in that the distance (d) of the baffle plate (10) from the mouth (18) of the inlet pipe (2) is approximately equal to the diameter (d) of the latter.
5. A distributor as claimed in one of Claims 1 to 4, having a spherical distributor drum, characterised in that the baffle plate (10) and the outlet pipes (15) are arranged in one half (6) of the sphere (4), and the inlet pipe (2) is arranged in the other half (5) of the sphere (4), and that the two halves (5, 6) are connected together by flanges, or welded together.
6. A distributor as claimed in Claim 5, characterised in that the side of the baffle plate (10) which faces away from the inlet pipe (2) is adapted to the spherical shape of the distributor drum (4).
7. A distributor as claimed in one of the Claims 1 to 6, characterised in that the baffle plate (10) is formed by a planar wall region of the distributor drum (4).
EP81108508A 1980-10-30 1981-10-19 Distribution system for a two-phase mixture, particularly a steam-water mixture in a once-through boiler Expired EP0051200B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81108508T ATE4002T1 (en) 1980-10-30 1981-10-19 DISTRIBUTORS FOR TWO-PHASE MIXTURES, PARTICULARLY WATER-STEAM MIXTURES IN FORCED-FLOW BOILERS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3040927 1980-10-30
DE3040927A DE3040927C1 (en) 1980-10-30 1980-10-30 Distributor for two-phase mixtures, especially water-steam mixtures in once-through boilers

Publications (3)

Publication Number Publication Date
EP0051200A1 EP0051200A1 (en) 1982-05-12
EP0051200B1 EP0051200B1 (en) 1983-06-29
EP0051200B2 true EP0051200B2 (en) 1988-07-20

Family

ID=6115577

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108508A Expired EP0051200B2 (en) 1980-10-30 1981-10-19 Distribution system for a two-phase mixture, particularly a steam-water mixture in a once-through boiler

Country Status (8)

Country Link
US (1) US4593653A (en)
EP (1) EP0051200B2 (en)
JP (1) JPS57104005A (en)
AT (1) ATE4002T1 (en)
CA (1) CA1167737A (en)
DE (1) DE3040927C1 (en)
DK (1) DK149717C (en)
ZA (1) ZA817499B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3123261A1 (en) * 1981-06-12 1982-12-30 Volkswagenwerk Ag, 3180 Wolfsburg Device for the uniform distribution of a two-phase flow
DE3145573C2 (en) * 1981-11-17 1985-03-28 L. & C. Steinmüller GmbH, 5270 Gummersbach Mass flow distribution device for dividing a water-steam mixture
JPH0612165B2 (en) * 1985-09-06 1994-02-16 三菱重工業株式会社 Gas-liquid two-phase fluid distributor
US4907619A (en) * 1988-06-15 1990-03-13 Delta Conveying Inc. Flow proportioner apparatus
US6945266B2 (en) * 2001-10-19 2005-09-20 Metallic Power, Inc. Manifold for fuel cell system
US6679280B1 (en) * 2001-10-19 2004-01-20 Metallic Power, Inc. Manifold for fuel cell system
DE10330659B3 (en) * 2003-07-08 2004-12-23 Gea Energietechnik Gmbh Steam drainage line for steam turbine power generation plant, with branch lines leading to air-cooled condensation elements tapped off from upwards inclined main steam drainage line
MX2010012015A (en) * 2008-05-06 2010-12-01 Fluor Tech Corp Methods and apparatus for splitting multi-phase flow.
US8726663B2 (en) * 2010-01-05 2014-05-20 General Electric Company Combined cycle system employing phase change material
EP2712663A1 (en) 2012-10-01 2014-04-02 Basf Se Apparatus, in particular column, with a horizontal supply for a fluid, in particular two-phase flow, and a deflection unit for that fluid
CN109340758B (en) * 2018-09-03 2020-08-21 江西国财中洁新能环境产业有限公司 Efficient rubbish pyrolysis device
CN111895846B (en) * 2020-06-11 2021-12-07 中海石油气电集团有限责任公司 Disc type gas-liquid two-phase fluid uniform distribution device

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US629520A (en) * 1898-12-10 1899-07-25 Robert Ludwig Mond Method of heating liquids.
US1599726A (en) * 1920-12-08 1926-09-14 Donald V H Smith Tubulous steam generator
US1650632A (en) * 1925-04-30 1927-11-29 Gen Electric Electrode steam boiler
US1887147A (en) * 1929-01-28 1932-11-08 Int Comb Eng Corp Regulating system for high capacity boilers
US2239895A (en) * 1938-12-15 1941-04-29 Riley Stoker Corp Waste heat boiler
US2299849A (en) * 1940-07-19 1942-10-27 Thomas J Rees Steam generating plant
US3048373A (en) * 1957-08-30 1962-08-07 Phillips Petroleum Co Heat exchange apparatus and method
GB871561A (en) * 1959-04-21 1961-06-28 Andre Huet Improvements in or relating to fluid distributing systems
FR1419832A (en) * 1964-10-21 1965-12-03 Siemens Ag Distribution device for tube systems of forced circulation boilers
US3338218A (en) * 1965-10-22 1967-08-29 Foster Wheeler Corp Once-through boiler downcomer flow distribution system
FR1505376A (en) * 1966-06-03 1967-12-15 Du Pont Improved apparatus for dividing a stream of viscous fluid
FR2210273A5 (en) * 1972-12-06 1974-07-05 Gutehoffnungshuette Sterkrade
US3899000A (en) * 1973-09-20 1975-08-12 Atlantic Richfield Co Liquid-vapor distributor
JPS51100795A (en) * 1975-02-28 1976-09-06 Shimadzu Corp Kuromatogurafuno karamuondoseigyosochi
JPS577989Y2 (en) * 1977-07-12 1982-02-16
US4333629A (en) * 1980-03-11 1982-06-08 Pepsico, Inc. Floating manifold for multi-cavity injection mold

Also Published As

Publication number Publication date
DK477281A (en) 1982-05-01
EP0051200B1 (en) 1983-06-29
DK149717B (en) 1986-09-15
US4593653A (en) 1986-06-10
EP0051200A1 (en) 1982-05-12
JPH0220883B2 (en) 1990-05-11
CA1167737A (en) 1984-05-22
ZA817499B (en) 1982-10-27
ATE4002T1 (en) 1983-07-15
DK149717C (en) 1987-03-30
JPS57104005A (en) 1982-06-28
DE3040927C1 (en) 1981-10-15

Similar Documents

Publication Publication Date Title
EP0051200B2 (en) Distribution system for a two-phase mixture, particularly a steam-water mixture in a once-through boiler
DE69304335T2 (en) DEVICE FOR MIXING TWO LIQUIDS WITH DIFFERENT TEMPERATURES
DE69629276T2 (en) FLAT NOZZLE
EP0132620B1 (en) Evaporator
EP1604162B1 (en) Tube bundle heat exchanger
EP0768424A2 (en) Heated roll
DE1461072B2 (en) FUEL TRAY DEVICE FOR PAPER MACHINES
DE3206625C2 (en) Retractable sootblower
EP0160661B1 (en) Pneumatic and hydraulic conveying installation for transporting bulk materials
CH629394A5 (en) RING SPLIT NOZZLE.
DE20321803U1 (en) Arrangement for feeding a second liquid to a paper pulp suspension
CH651487A5 (en) DEVICE FOR SPRAYING A COOLANT ON STEEL SLAB.
DE2933720A1 (en) LIQUID DISTRIBUTION DEVICE FOR COOLING TOWERS
EP1126227A1 (en) Steam condenser
EP0141029A2 (en) Phase distribution container
DE1932706C3 (en) Texturing device
DE971872C (en) Forced current steam generator with increased flow resistance
DE2153719B2 (en) HEAT TRANSFER DEVICE
CH628131A5 (en) STEAM GENERATOR WITH A PRESSURE BOILER AND A TUBE BUNDLE.
DE10001297A1 (en) Spring loaded water spray valve has angled jets to spray onto vertical plates and with the rate of spraying determined by the number of jets opened through the water pressure
EP0215327B1 (en) Fluidized-bed gas distributor with nozzles
DE3145573C2 (en) Mass flow distribution device for dividing a water-steam mixture
DE19515291C2 (en) Device for cleaning heat exchangers
DE3315250A1 (en) Device for flow distribution in heat exchangers
DE4117065C2 (en) Shell and tube evaporator for a refrigeration system

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19811019

AK Designated contracting states

Designated state(s): AT BE CH FR GB IT NL SE

ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 4002

Country of ref document: AT

Date of ref document: 19830715

Kind code of ref document: T

ET Fr: translation filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: GEBRUEDER SULZER AKTIENGESELLSCHAFT

Effective date: 19840326

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: SIEMENS AKTIENGESELLSCHAFT BERLIN UND MUENCHEN

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

NLT2 Nl: modifications (of names), taken from the european patent patent bulletin

Owner name: SIEMENS AKTIENGESELLSCHAFT TE BERLIJN EN MUENCHEN,

27A Patent maintained in amended form

Effective date: 19880720

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AT BE CH FR GB IT NL SE

NLR2 Nl: decision of opposition
ET3 Fr: translation filed ** decision concerning opposition
ITF It: translation for a ep patent filed

Owner name: MODIANO & ASSOCIATI S.R.L.

NLR3 Nl: receipt of modified translations in the netherlands language after an opposition procedure
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19890929

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19890930

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19891026

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19891027

Year of fee payment: 9

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19891031

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19891103

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19900124

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19901019

Ref country code: AT

Effective date: 19901019

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19901020

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19901031

Ref country code: CH

Effective date: 19901031

Ref country code: BE

Effective date: 19901031

BERE Be: lapsed

Owner name: SIEMENS A.G. BERLIN UND MUNCHEN

Effective date: 19901031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19910501

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19910628

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 81108508.3

Effective date: 19910603