EP0369851B1 - Dispositif de nettoyage d'un tube dans lequel circule un fluide - Google Patents

Dispositif de nettoyage d'un tube dans lequel circule un fluide Download PDF

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Publication number
EP0369851B1
EP0369851B1 EP89402980A EP89402980A EP0369851B1 EP 0369851 B1 EP0369851 B1 EP 0369851B1 EP 89402980 A EP89402980 A EP 89402980A EP 89402980 A EP89402980 A EP 89402980A EP 0369851 B1 EP0369851 B1 EP 0369851B1
Authority
EP
European Patent Office
Prior art keywords
tube
movable element
section
fluid
cross
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 - Lifetime
Application number
EP89402980A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0369851A1 (fr
Inventor
Pierre Maroy
Thierry Patureaux
Davis Freychet
Roben Loutaty
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.)
Total Marketing Services SA
Original Assignee
Total Raffinage Distribution 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 Total Raffinage Distribution SA filed Critical Total Raffinage Distribution SA
Priority to AT89402980T priority Critical patent/ATE74423T1/de
Publication of EP0369851A1 publication Critical patent/EP0369851A1/fr
Application granted granted Critical
Publication of EP0369851B1 publication Critical patent/EP0369851B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F28G3/00—Rotary appliances
    • F28G3/08—Rotary appliances having coiled wire tools, i.e. basket type
    • 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
    • F28G3/00—Rotary appliances
    • F28G3/10—Rotary appliances having scrapers, hammers, or cutters, e.g. rigidly mounted

Definitions

  • the present invention relates to a device for cleaning a tube in which a fluid circulates, in particular a heat exchanger tube according to the preamble of claim 1, such a device is known according to FR-A-2 569 829.
  • FR-A- 2 569 829 thus proposed a mechanical device intended to be placed inside a heat exchanger tube, in order to prevent fouling and to improve heat transfers, this device comprising at least one movable element and at least one system for attaching this mobile element and being characterized in that the mobile element is non-deformable and has a structure such that it can be put in permanent rotation by the fluid circulating in said exchanger tube, while the system of attachment includes a mechanical connection allowing the free rotation of the movable element on itself, around the axis of the exchanger tube.
  • the mobile element of this device can have a helical profile and it will comprise, for example, a metal wire wound in such a profile.
  • Various mechanical joints allowing the mobile to rotate freely on itself are described in this patent application.
  • a device for holding in position one end of a driven movable element in rotation inside a tube by the action of a fluid, characterized in that it comprises, on the one hand, a single-block bearing member, made of a rigid material capable of elastically deforming, comprising at least two branches separated by a distance such that they can be forcibly engaged in an open end of said tube to bear elastically against the internal wall of the latter, so as to make rigidly integral with said tube said member forming a bearing, d 'other hand, a pin, rotatably mounted relative to the bearing along the axis of the end of the tube and adapted to be made integral with the element driven in rotation.
  • the systems for cleaning the heat exchanger tubes fitted with such position-holding devices have proved to be particularly effective in the case where the fluid circulating in the tubes comprises liquid hydrocarbons, which cause relatively abundant fouling deposits, but of low hardness and whose adhesion to the walls of the tube is low.
  • the object of the invention is therefore to propose a device capable of preventing fouling of the tubes of a heat exchanger in which a fluid capable of depositing on the internal walls of this tube circulates scale or an adherent hard material. firmly at tube, and which thus avoids having to dismantle the bundle of tubes periodically to clean them, using a mobile element driven in rotation inside the tube by the fluid which circulates therein, which is such that the mobile element does not risk not to come to a standstill inside the tube in contact with scale or other deposit formed on the internal walls of the latter.
  • Another object of the invention is to propose a device of this type which improves heat transfers.
  • the subject of the invention is a device for continuously cleaning a tube in which a fluid circulates, in particular a tube of heat exchanger, this tube comprising a movable element of such shape that it can be driven in rotation by the fluid, and a mechanical connection making it possible to hook one end of this mobile element to one end of the tube, leaving it free to rotate on itself around the axis,
  • this device being characterized in that l mobile element comprises, in any cross section, at least one sharp edge, intended to scrape the internal surface of the tube, which is arranged so that during the rotation of the mobile element, it constitutes, in any section transverse of the tube, the part of the mobile element furthest from the axis of the tube.
  • sharp edge in the present specification is meant a salient angle of the polygonal section of the movable element.
  • the mobile element of the device will advantageously consist of a continuous longitudinal member wound in a helical profile and, in accordance with the invention, it will have a cross section comprising at least one edge disposed so as to scrape the internal face of the tube.
  • This section can be polygonal, for example triangular, rectangular, trapezoidal, or other.
  • a preferred embodiment because simple, is constituted by a thin metal strip, that is to say with a flattened rectangular section, wound in a helical profile.
  • Another preferred embodiment because it is commercially available, may be constituted by a metal half-rod, that is to say in profile with semi-circular section or in the form of a semicircle, wound following a helical profile.
  • the mechanical connection of the device may be of a type described in the patent applications mentioned above or of any other type, the systems of FR-A-2 612 267 being preferred.
  • the Applicant has moreover established, as will emerge from the examples which will follow in the present description, that the device defined above not only prevents or reduces deposits on the internal surface of the tubes which it equips, but, in the case where these tubes are used in a heat exchanger there Significantly increases the transfer of calories, due to the movement it imparts to the fluid circulating in the tubes, and the permanent renewal of the liquid film on the internal wall through which the thermal transfer takes place.
  • the member 1 thus forms a bearing for the pin 5 and the movable element 11, which can therefore rotate freely under the stress of the fluid flowing in the tube 10.
  • an anti-friction washer 16 can be interposed between the head 6 pin 5 and base 3 of bearing 1.
  • the movable element 11 is constituted by a thin metal strip, of rectangular section (see FIGS. 3 and 4) of which at least one edge 13 is permanently disposed in the vicinity of the internal face of the tube 10, in order to ensure continuous cleaning of this face.
  • the flat shape of the mobile element allows it to be easily rotated by the fluid flowing in the tube 10, and its edge 13, which is the furthest from the axis of the tube, that is to say that is to say the one closest to the internal wall of the latter, is thus driven in regular rotation in the immediate vicinity of this wall, of which it provides cleaning by scraping and by turbulence of the fluid.
  • the movable member 11 could also have a trapezoidal section, the edge 14 disposed in the vicinity of the inner face of the tube provides excellent scraping of the wall and whose aerodynamic shape facilitates the rotational drive by the liquid circulating in the tube.
  • the movable element 11 can also have a section in a half-ring, one edge 15 of which is contiguous to the internal face of the tube.
  • Such metal half-rods are available in the industry and it is therefore easy to produce in this form the mobile element.
  • the movable element may have a profile different from that of a propeller and may, for example, have one of the shapes described in patent application No. 2 569 828, provided, of course, that it has an edge arranged permanently in the vicinity of the internal face of the tube equipped with the device according to the invention.
  • the invention applies to the continuous cleaning of tubes in which fluids other than water containing dissolved materials circulate, for example water containing suspended materials, such as ferrites, or liquid mixtures based on urea, which can cause extremely hard deposits, as well as hydrocarbons; the invention also applies to mixtures, possibly multiphase.
  • the Applicant has not precisely determined the operating mode of the device which is the subject of the present invention, but it considers, without however implying any limitation of the scope of its invention, that during the rotation of the movable element, the internal surface of the tube is scraped by sectors of the sharp edge (s) which ensure (s) the dynamic contact between the movable element and the tube. The incipient deposit of tartar or hard material is then peeled off from the wall due to this scraping, and eliminated by the current of fluid and therefore cannot develop.
  • the Applicant has established that, surprisingly, the device according to the invention not only prevents or reduces deposits of solid material inside the tubes of heat exchangers, but, all other things being equal, produces an improvement sensitive thermal transfer. This will appear in particular from the following examples, among other advantages of the method and the device of the invention.
  • a spring steel strip with a rectangular section of 2.5 mm ⁇ was used as the movable element of the device according to the invention. 1 mm, wound in a regular spiral, so that the short side of its rectangular section is arranged radially in the tube.
  • the external diameter of the coil was 10 mm and its pitch of 17 mm.
  • a system of the type shown in FIG. 2 was used as a means of fixing the strip.
  • the internal wall of the tube not equipped with the cleaning device is covered with a layer of tartar with an average thickness of approximately 1 mm.
  • the internal wall of a tube equipped with the cleaning device is, under the same conditions and after the same operating time, covered with a layer of pie whose average thickness is less than 0.2 mm.
  • Example 1 In a tube with a length of 6 m and an internal diameter of 15 mm, a mobile element with the same characteristics as in Example 1 was placed.
  • a petroleum product (kerosene) was circulated through the tube at a speed of 1 m / s.
  • a heat transfer fluid was circulated so as to raise the temperature of the kerosene by heat exchange with the heat transfer fluid through the wall of the tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning In General (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP89402980A 1988-11-18 1989-10-27 Dispositif de nettoyage d'un tube dans lequel circule un fluide Expired - Lifetime EP0369851B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89402980T ATE74423T1 (de) 1988-11-18 1989-10-27 Reinigungsvorrichtung fuer ein rohr in dem ein fluid zirkuliert.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8814996A FR2639425B1 (fr) 1988-11-18 1988-11-18 Procede et dispositif de nettoyage d'un tube dans lequel circule un fluide, et utilisation dans les tubes d'echangeurs de chaleur
FR8814996 1988-11-18

Publications (2)

Publication Number Publication Date
EP0369851A1 EP0369851A1 (fr) 1990-05-23
EP0369851B1 true EP0369851B1 (fr) 1992-04-01

Family

ID=9371964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89402980A Expired - Lifetime EP0369851B1 (fr) 1988-11-18 1989-10-27 Dispositif de nettoyage d'un tube dans lequel circule un fluide

Country Status (9)

Country Link
US (1) US5013368A (zh)
EP (1) EP0369851B1 (zh)
JP (1) JP2799201B2 (zh)
KR (1) KR0133665B1 (zh)
CN (1) CN1021080C (zh)
AT (1) ATE74423T1 (zh)
AU (1) AU615120B2 (zh)
DE (1) DE68901129D1 (zh)
FR (1) FR2639425B1 (zh)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2572437Y2 (ja) * 1991-01-11 1998-05-25 泰成工業 株式会社 連続管内スクレーパ
US6039059A (en) * 1996-09-30 2000-03-21 Verteq, Inc. Wafer cleaning system
JP3255866B2 (ja) * 1997-01-30 2002-02-12 カゴメ株式会社 食品材料の連続煎炒装置
US5971061A (en) * 1998-09-21 1999-10-26 Y.T. Li Engineering, Inc. Edge-hanging orbital rod support and drive for vertical tube-type heat exchanger
FR2787564B1 (fr) * 1998-12-22 2001-03-02 Total Raffinage Distribution Perfectionnements apportes aux tubes d'echangeurs thermiques, en vue d'eviter le colmatage de leur entree par des materiaux en suspension
US6726778B2 (en) * 2002-01-14 2004-04-27 Je Cleanpress Ltd. Co. Method for cleaning and renovating pipelines
CN100362309C (zh) * 2003-07-02 2008-01-16 友达光电股份有限公司 清除排气管的清洁装置与方法
GB0326707D0 (en) * 2003-11-17 2003-12-17 Boc Group Plc Exhaust gas treatment
FR2890162B1 (fr) * 2005-08-30 2007-11-30 Total France Sa Dispositif reducteur d'encrassement d'un echangeur thermique tubulaire.
DE102006007443A1 (de) * 2006-02-17 2007-08-23 BSH Bosch und Siemens Hausgeräte GmbH Reinigungsvorrichtung für ein Bauteil eines Haushaltswäschetrockners
FR2940152B1 (fr) 2008-12-19 2011-01-21 Total Raffinage Marketing Dispositif pour la reduction de l'encrassement a l'interieur d'un tube
US20100173255A1 (en) * 2009-01-05 2010-07-08 Nordyne Inc. NOx-REDUCTION APPARATUS, METHOD OF MAKING, FURNACE, HVAC UNIT, AND BUILDING
US20120175078A1 (en) * 2011-01-11 2012-07-12 Saxon Gregory J Heat exchanger tube cleaning apparatus and method of removing a blockage from a tube
CN102901399B (zh) * 2011-07-27 2014-10-15 俞天翔 一种流体动力弹性变形蓄能式自转钢丝螺旋
CN107309226A (zh) * 2017-05-25 2017-11-03 成都市容德建筑劳务有限公司 可调节管内壁清洁装置
FR3094764B1 (fr) 2019-04-05 2021-05-14 Total Raffinage Chimie Insert d’extrémité de conduit
FR3105386B1 (fr) * 2019-12-19 2022-10-07 Commissariat Energie Atomique Echangeur thermique de type à surface raclée comportant un système d’actionnement hydraulique
CN111426231B (zh) * 2020-04-05 2022-02-18 俞天翔 一种铁芯塑料螺旋扭带自动清洗机构
CN117606262B (zh) * 2024-01-18 2024-04-30 河南心连心智能装备科技有限公司 一种可消除应力的废锅换热器

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2117175A (en) * 1937-02-11 1938-05-10 Henry Vogt Machine Co Spiral scraper for pipe type chillers
US2943845A (en) * 1957-10-23 1960-07-05 Jaklitsch Franz Heat exchanger for viscous fluids
FR1508224A (fr) * 1966-11-21 1968-01-05 Hispano Suiza Sa Perfectionnements apportés aux appareils d'échanges thermiques à faisceau tubulaire
JPS5034981Y2 (zh) * 1971-08-19 1975-10-11
US4174750A (en) * 1978-04-18 1979-11-20 Nichols Billy M Tube cleaner having anchored rotatable spiral member
FR2430580A1 (fr) * 1978-07-03 1980-02-01 Anvar Systeme perfectionne de pompe a chaleur
FR2589229B1 (fr) * 1985-10-25 1988-01-08 Neu Ets Procede et dispositif automatique de nettoyage d'un echangeur de chaleur pour fluides gazeux
FR2592924B1 (fr) * 1986-01-10 1989-10-20 Total France Dispositif de maintien en position d'une extremite d'un element mobile, entraine en rotation dans un tube et application a la prevention de l'encrassement et au nettoyage de ce tube.
SE458717B (sv) * 1986-11-17 1989-04-24 Sandvik Ab Cylinder foer vaermevaexlare
FR2612267B1 (fr) * 1987-03-13 1989-07-21 Total France Dispositif pour le maintien en position d'une extremite d'un element monte mobile en rotation dans un tube et application de ce dispositif

Also Published As

Publication number Publication date
AU4531289A (en) 1990-05-24
JP2799201B2 (ja) 1998-09-17
CN1042594A (zh) 1990-05-30
ATE74423T1 (de) 1992-04-15
KR0133665B1 (ko) 1998-04-28
EP0369851A1 (fr) 1990-05-23
AU615120B2 (en) 1991-09-19
FR2639425B1 (fr) 1991-06-07
KR900008238A (ko) 1990-06-02
US5013368A (en) 1991-05-07
CN1021080C (zh) 1993-06-02
DE68901129D1 (de) 1992-05-07
FR2639425A1 (fr) 1990-05-25
JPH02187596A (ja) 1990-07-23

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