EP1777482B1 - Filtergitter zur Trennung von Reinigungskörpern aus der Trägerflüssigkeit eines Wärmetauschers - Google Patents

Filtergitter zur Trennung von Reinigungskörpern aus der Trägerflüssigkeit eines Wärmetauschers Download PDF

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Publication number
EP1777482B1
EP1777482B1 EP06291623A EP06291623A EP1777482B1 EP 1777482 B1 EP1777482 B1 EP 1777482B1 EP 06291623 A EP06291623 A EP 06291623A EP 06291623 A EP06291623 A EP 06291623A EP 1777482 B1 EP1777482 B1 EP 1777482B1
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EP
European Patent Office
Prior art keywords
supports
plates
filter grid
welded
filtering element
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.)
Not-in-force
Application number
EP06291623A
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English (en)
French (fr)
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EP1777482A1 (de
Inventor
Damien Thivent
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.)
Technos et Cie
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Technos et Cie
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Publication date
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Publication of EP1777482A1 publication Critical patent/EP1777482A1/de
Application granted granted Critical
Publication of EP1777482B1 publication Critical patent/EP1777482B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/12—Fluid-propelled scrapers, bullets, or like solid bodies

Definitions

  • the invention relates to the cleaning of heat exchangers (in particular of the tubular or plate type).
  • a tubular heat exchanger comprises, in a conventional manner, a plurality of tubes in which circulates a heat transfer fluid. To ensure the cleaning of the tubes, it is done, usually occasionally and repeatedly, circulate in the tubes, within the fluid, the cleaning bodies which pickle the inner walls of the tubes to prevent their fouling by the deposition of impurities conveyed by the fluid. These bodies - with a diameter slightly greater than the internal diameter of the tubes - are collected downstream of the heat exchanger and then reinjected upstream.
  • one or more separation grids which, while allowing the fluid to pass through, retain the cleaning bodies and guide them towards a recycling device.
  • This grid comprises a plurality of longitudinal reinforcements (called side members) interconnected by cross members and mounted on a pivot axis.
  • Filter elements are mounted (removably) between the frames.
  • Each filter element comprises a plurality of parallel strips whose spacing is smaller than the diameter of the cleaning bodies, connected by a plurality of parts called spacers, arranged perpendicularly to the lamellae.
  • the filtering element is metallic, generally made of stainless steel: the lamellae are welded to straight metal rods which form the spacers, these rods being in turn welded by their ends to plates (called cheeks) by which the element is attached to the side members.
  • This type of filter element is complex to manufacture.
  • the soldering of the struts to the cheeks is a particularly delicate operation because it is necessary to ensure a good flatness of the cheek, and a good parallelism of the cheeks between them, to allow mounting of the filter element between two longitudinal members by minimizing the games.
  • the filter element is made of a block by molding a synthetic material (polystyrene, PVC, or the like). If the manufacture is simplified compared to the first type presented above, there are in practice problems of mechanical strength: it happens in fact that a filter element breaks under the repeated impacts of the balls, or under the unexpected impact of debris of equivalent or larger size.
  • the invention aims in particular to overcome the aforementioned drawbacks of filtration grids using known filter elements.
  • This design facilitates the manufacture of the filter element, while ensuring good mechanical strength.
  • the subject of the invention is also a method of manufacturing such a filtering grid, as defined by claim 8.
  • FIG. 1 there is shown a discharge pipe 1 for a heat exchanger (not shown but whose general structure is for example in accordance with the patent application French FR 2 634 672 in the name of the plaintiff).
  • This pipe 1, tubular, is disposed downstream of the heat exchanger; it is traversed by a heat transfer fluid such as water, which carries spherical cleaning bodies (called “balls”) for stripping the pipes of the heat exchanger.
  • a heat transfer fluid such as water, which carries spherical cleaning bodies (called “balls") for stripping the pipes of the heat exchanger.
  • the balls are separated from the fluid by a filtration device 2 which comprises at least one filtering grid 3 mounted obliquely in the duct 1. More precisely, in accordance with the embodiment illustrated in the figures, the filtration device 2 comprises two grids 3 vis-à-vis mounted obliquely in the conduit 1 to jointly form a funnel separating the balls of the fluid and the guide to a recycling device (not shown) which reinjects the balls upstream of the heat exchanger.
  • Each grid 3 comprises a plurality of equidistant parallel beams 4, mounted on a common pivot axis 5, perpendicular to the longitudinal members 4 and rotatably mounted by each of its ends 6, 7, in two bearings 8 formed by substantially diametrically opposed holes practiced. in the wall of the duct 1.
  • the spars 4 are in the form of metal blades (made, in practice, stainless steel) which have a rectilinear upstream edge 9, and a curved downstream edge 10, bulged at the passage of the axis 5. Two adjacent spars define between them a corridor 11 with a substantially rectangular contour. In each corridor 11 is mounted a filter element 12 reported.
  • Each filter element 12 comprises a plurality of metal strips 13 parallel to each other and to longitudinal members 4, and whose spacing is less than the diameter of the balls, and a plurality of metal supports 14 arranged parallel to each other and perpendicular to the lamellae 13, and on which they are fixed.
  • each support 14 is in the form of a single piece having a U-shaped profile, comprising a central core 15, which extends parallel to the axis 5, extended on either side by two legs 16, 17 substantially perpendicular to both the core 15 and the lamellae 13.
  • each support 14 is shaped by folding from a straight metal part.
  • the lamellae 13 are fixed to the supports 14 by welding. More precisely, as is visible on the figure 6 , the lamellae 13 have a triangular section in section, and have a flat upstream edge 18, and a sharp downstream edge 19, so as to limit the pressure drops during the passage of the fluid.
  • the slats 13 are fixed to the supports 14 by their downstream edge 19, which is welded to a rib 20 projecting from an outer edge 21 - or leading edge - of each support 14.
  • the lamellae 13 are not only welded to the web 15 of the supports 14: in fact, a first series of lamellae 13 is welded to the webs 15 of the supports 14, and two other series of lamellae 13 are welded, from both sides. Another of the webs 15, to the legs 16, 17.
  • the slats 13 of these last two series thus form, together with the legs 16, 17 corresponding, cheeks 22, 23 through which the filter element 12 is fixed to the longitudinal members 4. Washers (not shown) can be welded on the cheeks 22, 23 for supporting fastening bolt heads passing through the longitudinal members 4.
  • a filter element 12 of the type described above has the advantage of simplicity of manufacture, while having a mechanical strength equivalent to that of the known filter elements made of steel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Claims (9)

  1. Filtergitter (3), das dazu bestimmt ist, von einem Wärmetauscher kommende Reinigungskörper von einem Trägerfluid zu trennen, wobei dieses Gitter (3) mehrere parallele Längsträger (4) in gleichem Abstand zueinander, die auf einer gemeinsamen Drehachse (5) lotrecht zu den Längsträgern (4) montiert sind, und mehrere Filterelemente (12) aufweist, die jeweils enthalten:
    - mehrere parallele Metalllamellen (13), und
    - mehrere Metallträger (14), die parallel zueinander und lotrecht zu den Lamellen (13) angeordnet sind, und an denen diese befestigt sind,
    dadurch gekennzeichnet, dass jeder Träger (14) ein einstückiges Bauteil mit einem U-Profil ist, das einen Mittelteil (15) aufweist, der auf beiden Seiten von zwei Schenkeln (16) verlängert ist, die im Wesentlichen lotrecht zu dem Mittelteil (15) sind.
  2. Filtergitter nach Anspruch 1, dadurch gekennzeichnet, dass jeder Träger (14) eines Filterelements (12) durch Biegen ausgehend von einem geraden Metallbauteil in Form gebracht wird.
  3. Filtergitter nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Lamellen (13) eines Filterelements (12) an die Träger (14) geschweißt sind.
  4. Filtergitter nach Anspruch 3, dadurch gekennzeichnet, dass eine erste Reihe von Lamellen (13) eines Filterelements (12) an die Mittelteile (15) der Träger (14) geschweißt ist, und dass zwei andere Reihen von Lamellen (13) an die Schenkel (16) der Träger (14) geschweißt sind.
  5. Filtergitter (3) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Lamellen (13) eines Filterelements (12) im Schnitt ein dreieckiges Profil haben und eine flache Vorderkante (18) und eine spitze Hinterkante (19) aufweisen.
  6. Filtergitter nach Anspruch 3 oder 4 in Kombination mit Anspruch 5, dadurch gekennzeichnet, dass die Lamellen (13) eines Filterelements (12) über ihre Hinterkante (19) auf die Träger (14) geschweißt sind.
  7. Filtergitter nach Anspruch 6, dadurch gekennzeichnet, dass jeder Träger (14) eines Filterelements (12) eine an einem Außenrand (21) vorstehende Rippe (20) aufweist, auf die die Lamellen (13) geschweißt sind.
  8. Verfahren zur Herstellung eines Filtergitters nach einem der Ansprüche 3 bis 7, das die Schritte aufweist, die darin bestehen:
    a) Filterelemente (12) bereitzustellen, die jeweils hergestellt werden, indem mehrere Metalllamellen (13) sowie mehrere Träger (14) in Form von geraden Metallbauteilen bereitgestellt werden, und indem die zwei folgenden Teilschritte durchgeführt werden:
    - Schweißen der parallel zueinander angeordneten Lamellen (13) an die parallel zueinander und lotrecht zu den Lamellen (13) angeordneten Träger (14),
    - U-förmiges Umbiegen der Träger (14), damit jeder Träger einen Mittelteil (15) aufweist, der auf beiden Seiten von zwei Schenkeln (16) im Wesentlichen lotrecht zum Mittelteil (15) verlängert ist;
    b) mehrere parallele und einen gleichmäßigen Abstand aufweisende Längsträger (4) auf eine gemeinsame Drehachse (5) lotrecht zu den Längsträgern (4) so zu montieren, dass zwei benachbarte Längsträger zwischen sich einen Durchgang (11) mit im Wesentlichen rechteckigem Umriss definieren;
    c) ein aufgesetztes Filterelement (12) in jeden Durchgang (11) zu montieren.
  9. Vorrichtung (2) zum Trennen der von einem Wärmetauscher kommenden Reinigungskörper von einem Trägerfluid, wobei diese Vorrichtung ein Ableitungsrohr (1) und schräg in dieses eingebaut mindestens ein Filtergitter (3) nach einem der Ansprüche 1 bis 7 aufweist.
EP06291623A 2005-10-19 2006-10-18 Filtergitter zur Trennung von Reinigungskörpern aus der Trägerflüssigkeit eines Wärmetauschers Not-in-force EP1777482B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0510668A FR2892185B1 (fr) 2005-10-19 2005-10-19 Element filtrant pour une grille de filtration destinee a separer d'un fluide porteur des corps nettoyants provenant d'un echangeur thermique.

Publications (2)

Publication Number Publication Date
EP1777482A1 EP1777482A1 (de) 2007-04-25
EP1777482B1 true EP1777482B1 (de) 2009-01-21

Family

ID=36648818

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06291623A Not-in-force EP1777482B1 (de) 2005-10-19 2006-10-18 Filtergitter zur Trennung von Reinigungskörpern aus der Trägerflüssigkeit eines Wärmetauschers

Country Status (5)

Country Link
EP (1) EP1777482B1 (de)
AT (1) ATE421672T1 (de)
DE (1) DE602006004940D1 (de)
ES (1) ES2321441T3 (de)
FR (1) FR2892185B1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL186273C (nl) * 1983-06-30 1990-10-16 Ishikawajima Harima Heavy Ind Inrichting voor het reinigen van de in hoofdzaak in horizontale richting lopende, buizen van een warmtewisselaar.
FR2634600B1 (fr) * 1988-07-20 1990-09-28 Metal Deploye Chemin de cables realise avec un treillis de fils metalliques soudes
FR2804253B1 (fr) * 2000-01-24 2002-05-10 Krieg & Zivy Ind Chemin de cables en fils a haute resistance
FR2811072B1 (fr) * 2000-07-03 2002-10-18 Beaudrey C S Grille pour intercepter des elements solides mis en circulation dans un echangeur de chaleur pour le nettoyage de celui-ci, et installation de gestion de tels elements comportant une telle grille
FR2815548B1 (fr) * 2000-10-25 2003-08-15 Technos Et Cie Grille de separation pour separer des corps nettoyants d'un fluide et dispositif comprenant une telle grille

Also Published As

Publication number Publication date
DE602006004940D1 (de) 2009-03-12
EP1777482A1 (de) 2007-04-25
FR2892185B1 (fr) 2008-12-26
FR2892185A1 (fr) 2007-04-20
ATE421672T1 (de) 2009-02-15
ES2321441T3 (es) 2009-06-05

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