EP0087645A2 - Dispositif de nettoyage des tubes des échangeurs de chaleur et procédé d'utilisation d'un tel dispositif - Google Patents

Dispositif de nettoyage des tubes des échangeurs de chaleur et procédé d'utilisation d'un tel dispositif Download PDF

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Publication number
EP0087645A2
EP0087645A2 EP83101302A EP83101302A EP0087645A2 EP 0087645 A2 EP0087645 A2 EP 0087645A2 EP 83101302 A EP83101302 A EP 83101302A EP 83101302 A EP83101302 A EP 83101302A EP 0087645 A2 EP0087645 A2 EP 0087645A2
Authority
EP
European Patent Office
Prior art keywords
cooling water
balls
chamber
housing
partition
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.)
Granted
Application number
EP83101302A
Other languages
German (de)
English (en)
Other versions
EP0087645B1 (fr
EP0087645A3 (en
Inventor
Rolf Bochinski
Klaus Dipl.-Ing. Eimer
Harald Littek
Johannes Nasse
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.)
Taprogge GmbH
Original Assignee
Taprogge GmbH
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 Taprogge GmbH filed Critical Taprogge GmbH
Publication of EP0087645A2 publication Critical patent/EP0087645A2/fr
Publication of EP0087645A3 publication Critical patent/EP0087645A3/de
Application granted granted Critical
Publication of EP0087645B1 publication Critical patent/EP0087645B1/fr
Expired 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
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/12—Fluid-propelled scrapers, bullets, or like solid bodies
    • 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
    • Y10T137/794—With means for separating solid material from the fluid
    • Y10T137/8049—Movable strainer

Definitions

  • the invention relates to a device for cleaning heat exchanger tubes by means of elastic, spherical bodies, in particular spheres made of cellular rubber, consisting of a cylindrical housing in which chambers are formed by a plurality of partition walls rotating about a vertical axis, which chambers are separated by a horizontal sieve plate
  • Upper chamber group for receiving the balls and a lower chamber group are divided, as well as with two opposing cooling water inlet and outlet connections in the area of the lower chamber group and two similar cooling water connections in the area of the upper chamber group, which are connected to the heat exchanger tubes.
  • a device for seawater desalination plants, a device is known from Japanese Patent 1,049,909, as described at the beginning.
  • Six compartments of equal size are formed within the housing by six partition walls.
  • the lower chamber group divided by the sieve plate, serves to supply and discharge the cooling water to and from the cleaning system as well as to separate and remove contaminants from the cooling water, while from the upper chamber system the cleaning balls with the cooling water are fed to the heat exchanger tubes and collected again will.
  • the invention has for its object to provide a device with which discontinuous operation while stopping the balls in a chamber not acted upon by the flow and thus also an exchange of the balls is possible without switching off the cooling water flow. Furthermore, a safe ball transport should also be guaranteed with reduced or strongly fluctuating throughput, and also a cleaning of the supplied cooling water and discharge of the contaminants separated from the ball circulation. In addition, a simple and reliable sealing system without sealing water is to be created.
  • the invention provides that the interior of the housing is divided into three chambers of equal size by three partition walls, each offset by 120, the cross-sectional area of which is approximately the same size as the cross-sectional area of a cooling water nozzle.
  • the partition walls in the area of the housing wall and in the area of the housing cover and bottom are provided with a circumferential, mechanical seal.
  • This seal can consist of an elastic band, which is fixed in the direction of rotation on the respective back of the partition walls and the free end bent against the direction of rotation bears against the housing wall.
  • this seal can also be fastened on the respective front side of the partition walls and bent with its free end against the direction of rotation into the gap between the partition wall edge and the housing inner wall and rest against the housing wall.
  • the seal itself can consist of an elastic plastic or elastomer or an elastic steel band with a sliding layer on the sealing edge.
  • the sealing gap is seen on the respective front side of the partition walls in the direction of rotation largely overlapping, inclined in the direction of rotation deflector made of rigid material is arranged.
  • the distance between the outer edge of the deflector and the inner wall of the housing should not exceed one third of the respective half diameter of the balls.
  • a circumferential ring is arranged at the height of this sieve plate, which runs essentially transversely to the dividing walls, at a short distance from the housing inner wall.
  • the ring should have a maximum of the height of the housing wall between the upper and lower cooling water connections, so as not to reduce the flow cross-section.
  • the sieve plate In addition to the known, flat design of the sieve plate, it is particularly advantageous to make the sieve plate approximately conical and to arrange it with the tip pointing upwards. This makes it easier to keep contaminants in the cooling water away from the housing wall.
  • the sieve plate it is also possible for the sieve plate to consist of three individual, flat partial sieves which are arranged pyramid-shaped in the individual chambers and extend obliquely upwards.
  • the circumferential ring should be placed on the outer edge of the sieve plate.
  • a proximity switch is expediently provided, which is operatively connected to a partition wall in such a position that one of the chambers both of the incoming and outgoing cooling water is completed.
  • a second proximity switch can be arranged offset by 60 to the first proximity switch.
  • a method for discontinuous operation of the device in which, by rotating the partition walls in steps of 120 ° , a rest position follows an operating position in such a way that the balls come out of the chamber connected to the upper cooling water outlet connection discharged and after passing through the heat exchanger tubes in the opposite chamber, which is connected to the upper cooling water inlet supports, and after being rotated through a further 120 ° in a chamber which is not connected to any of the cooling water connections, is held in the rest position.
  • Another method according to the invention for the continuous operation of such a device is characterized by continuously rotating the partition walls, catching the balls by stopping the rotation in the position of a partition wall on the first proximity switch and stopping in the rest position by moving the second proximity switch.
  • a pressure difference for rinsing the balls is generated on the rest chamber containing the balls.
  • cooling water of higher pressure is introduced into the resting chamber and the balls are rinsed out with the cooling water to a point of lower pressure.
  • an arrangement is expedient in which the upper cooling water outlet connection and the rest chamber are connected to one another by a lockable bypass line, and the rest chamber and the upper cooling water inlet connection are connected by a further discharge line containing a ball lock for the balls.
  • bypass line should open at the lowest point in the rest chamber, while the discharge line should open at an upper point in the rest chamber.
  • the ball lock can expediently have a collecting chamber for balls to be removed and a feed chamber for balls to be inserted, both chambers being fluidly connected to one another by a sieve-like separation.
  • the cleaning device 1 has a cylindrical housing 2, in the interior of which three radial partition walls 4, 5 and 6 are arranged offset by 120 ° relative to one another, rotating about a longitudinal axis 3. As a result, three separate chambers 7, 8 and 9 are formed.
  • an approximately conical sieve plate 10 is arranged transversely to the dividing walls 4, 5 and 6, with its tip pointing upwards, which divides the chambers formed by the dividing walls into an upper chamber group 7a, 8a and 9a and in a lower chamber group 7b, 8b and 9b divided.
  • the housing 2 has a cooling water supply pipe 11 and a cooling water discharge pipe 12 opposite one another, while in the area of the upper chamber group 7a, 8a and 9a a cooling water discharge pipe 13 and a cooling water return pipe 14 are also provided opposite each other
  • the cooling water for the schematically indicated heat exchanger 15 now flows from a cooling water source, not shown, into the lower chamber 7b and from here via the sieve plate 10 into the upper chamber 7a, impurities 19 being retained on the underside of the sieve plate 10.
  • the cooling water takes the cleaning balls 20 with it and flows from here via the cooling water discharge pipe 13 into the inlet chamber 17 of the heat exchanger 15.
  • any deposits or a deposit are carried along by the elastic balls 20 avoided at all on the inner walls of the tubes.
  • the cooling water leaves the heat exchanger 15 via the outlet chamber 18 and flows through the cooling water return pipe 14 into the upper chamber 9a.
  • the balls 20 are retained by the sieve plate 10.
  • the cooling water sockets 11 to 14 and the chambers 7, 8 and 9 each have approximately the same free cross section for the cooling water flowing through. This ensures that the flow velocity in the supply and discharge lines and in the chambers themselves is not substantially different, but rather approximately constant. This ensures that even with weak loads on the heat exchanger and consequently lower cooling water throughput and thus lower flow speed, the cleaning balls are always safely taken away from the cooling water and are not left in the upper chamber 7a due to insufficient flow.
  • the partition walls have additional seals 25 against the inner wall of the housing and against the housing cover 26 and the housing base 27. Different embodiments of the seals are shown in FIGS. 3 to 6.
  • an elastic sealing band 28 - for example made of a flexible plastic or rubber or another elastomer - is fastened on the back of the partition 4 by means of a holding plate 29 by screwing or a similar holder.
  • the free end 30 of this seal 28 is bent against the direction of rotation of the partition and abuts the inner wall 2 of the housing.
  • this seal can also consist of a flexible steel sheet, the sealing edge of which has a sliding layer, for example in the form of PTFE.
  • the partition must end at a certain distance from the inner wall of the housing for manufacturing reasons. As a result, there is a risk that the relatively soft cleaning balls made of cellular rubber are drawn into the gap 31 and get into the next chamber. To prevent this, there is a deflector largely covering the sealing gap 31 on the front of the partition wall, as seen in the direction of rotation. 32 made of rigid material, the outer end 33 of which is inclined in the direction of the sealing gap 31 in the direction of rotation. As is shown in the figure, this reliably prevents balls 20 from being drawn into the gap 31. The remaining external distance a of the deflector 32 is expediently a maximum of one third of the respective radius r of the ball 20.
  • FIG. 4 A further exemplary embodiment for bridging the column is shown in FIG. 4.
  • the Seal 35 longer and thinner, with the holder 36 being guided almost to the end of the sealing strip 35 in order to ensure the necessary stability.
  • the opposite deflector 37 is continuously bent at its front end to allow the balls to be caught and discharged gently.
  • the sealing tape 38 and the deflector 39 are arranged on the same side of the dividing wall - specifically in the direction of rotation on the front side - the deflector 39 also serving as a holder for the sealing tape 38.
  • the free end 40 of the sealing tape 38 is also bent against the direction of rotation and protrudes into the gap between the edge of the partition and the inner wall of the housing.
  • a circumferential ring 41 is arranged at the level of this screen plate 10, as is the case 1 and 2 can be seen.
  • This ring 41 is expediently placed on the outer edge of the sieve plate 10 at a short distance from the housing inner wall and has a maximum of the height of the housing wall between the lower and the upper cooling water nozzles 11 or 12 and 13 or 14 in order to avoid that the free flow cross section is restricted in the area of the nozzle.
  • the cleaning balls 2o are thus largely held within the area of this ring 41 and thus hardly come into contact with the housing wall, but are generally discharged directly above the ring 41 via the nozzle 13.
  • FIGS. 7A-C show a section through the upper chamber group approximately corresponding to section line II-II in FIG. 1.
  • the partitions 4, 5 and 6 have taken such a position that a safe separation of the outflowing cooling water via the connector 13 from the incoming cooling water via the connector 14 is ensured.
  • one chamber - now Ba - is completely isolated from the cooling water flow.
  • a proximity switch 45 is arranged at a point that the partition walls are currently occupying - offset by 90 ° to the axis of the connecting piece 13 according to the figure , which emits a signal, for example, to a counter, which can then be used to stop the rotation in the desired position.
  • the balls were first rinsed out of the chamber 9a with the cooling water and are just being collected and collected with the returning cooling water behind the nozzle 14 in the chamber 7a.
  • the partitions are rotated until the next partition 6 reaches the proximity switch 45 and is stopped there.
  • the 120 0- chamber has reached 7a with the balls 20, the position corresponding to Fig. 7B, with which the balls are moved 20 from the cooling water flowing out into the rest position, currencies rend the actual cooling of the heat exchanger can continue unimpeded.
  • FIG. 7C a position corresponding to FIG. 7C is reached.
  • the chamber 7a is now in communication with the cooling water outlet connection 13, so that the balls 20 are gripped by the cooling water flowing in from below and discharged into the heat exchanger to be cleaned. Subsequently, they are caught again in the now opposite chamber 8a via the connector 14 and can then be returned to the rest position from here.
  • a further proximity switch which is offset by 60 ° to the first. 8A-D, for example, a switch 46 is arranged at an angle of 270 to the axis of the outlet connection 13 and a further proximity switch 47 is arranged at an angle of 330 °.
  • the balls are released into the circuit after the partition walls have been rotated into a position according to FIG. 8B. Then several 120 ° steps can be carried out for a longer cleaning phase.
  • the partitions are in one position accordingly Fig. 8C stopped until all balls are caught again. Then the lower partition 5 moves to the proximity switch 47, so that the rest position according to FIG. 8A is reached again.
  • FIGS. 9A-D A similar circuit is shown in FIGS. 9A-D, but continuous cleaning over a longer period of time is possible here.
  • the partition walls are rotated continuously according to FIG. 9B, so that the balls are continuously conveyed from the right collecting chamber into the left outflow chamber.
  • the partitions are then stopped again in a position according to FIG. 9C and then in the rest position according to FIG. 9D driven.
  • the advantage of the circuit according to FIGS. 8A-D and 9A-D is that, regardless of a previous position or mode of operation, the balls are always trapped by any partition when the proximity switch 46 is started and these balls are then moved into the position when the proximity switch 47 is subsequently started Rest position are driven.
  • a bypass line 50 provided with a shut-off slide 51 is led from the cooling water outlet connection 13 into the rest chamber 7a, where it opens at the lowest possible point in the area of the sieve foot or below.
  • a discharge line 52 then emanates from a higher point in the rest chamber 7a and opens out back into the system at a point of low pressure - for example in the cooling water return pipe 14.
  • the actual ball lock l 53 is arranged in this discharge line 52 and can be separated on both sides by gate valves 54 and 55. This ball lock 53 itself is divided by a screen-like partition 56 into a collecting chamber 57 and a feed chamber 58.
  • the gate valves 51, 54 and 55 are first opened. As a result, water of higher pressure flows from the outlet connection 13 'into the rest chamber 7a and flushes the balls 20 via the discharge line 52 into the collecting chamber 57 of the ball lock 53. After the slide valves 51, 54 and 55 have been shut off, the balls can then be removed from the collecting chamber 57 and new balls are inserted into the feed chamber 58. After opening all the slides, the balls are flushed out into the return pipe 14 and thus get back into the circuit.
  • the housing can have a trough-shaped bulge, which alone creates a flow bypass around the partition wall 5 and enables high-pressure water to reach the rest chamber 7a from the connector 13.
  • FIG. 11 A further possibility for generating a pressure difference in the rest chamber 7a is explained in FIG. 11. Then the partitions are rotated by a small amount - a maximum of about 10 ° - in the direction of rotation from their rest position, so that there is a narrow gap 61 to the cooling water outlet connection 13 on the partition wall 5. Water of higher pressure can thus flow into the rest chamber 7a along the arrow 62 and thus cause the balls 20 to be discharged into the discharge line 52.
  • This further turning of the partitions can be done manually or automatically by means of a further proximity switch.
  • a cleaning system is created with which not only the cooling medium - which can be not only water - but also the heat exchanger can be cleaned in the heat exchanger circuits and existing contaminants can also be removed from the cooling medium independently of the cleaning of the heat exchanger.
  • the 3-chamber principle according to the invention results in the lowest possible number of chambers, which ensures permanent sealing of the inflowing medium against the outflowing medium; the device thus has the smallest possible dimension, since 2 x 1/3 of the entire cross-sectional area is always flowed through by the medium, so that there is always sufficient speed in the chambers to safely discharge the balls and to transport them through the heat exchanger.
  • there is a partition wall position with a rest chamber which is not traversed by the medium and in which all balls can be collected and caught in the rest phase without the cooling of the heat exchanger being interrupted. This means that the balls are not constantly exposed to the cooling water flow, which extends their service life and their full usability. The balls can then be removed from this rest chamber without an undercut The cooling water circuit is rinsed out, removed and replaced with new balls.
  • the exemplary embodiments shown show only a few design options for the basic principle of the invention; for example, it is also possible for the device to be operated in a horizontal arrangement without changing the mode of operation.

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  • 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)
EP83101302A 1982-03-02 1983-02-11 Dispositif de nettoyage des tubes des échangeurs de chaleur et procédé d'utilisation d'un tel dispositif Expired EP0087645B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823207466 DE3207466A1 (de) 1982-03-02 1982-03-02 Vorrichtung zum reinigen von waermetauscher-roehren und verfahren zum betrieb einer derartigen vorrichtung
DE3207466 1982-03-02

Publications (3)

Publication Number Publication Date
EP0087645A2 true EP0087645A2 (fr) 1983-09-07
EP0087645A3 EP0087645A3 (en) 1984-03-28
EP0087645B1 EP0087645B1 (fr) 1985-10-16

Family

ID=6157105

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83101302A Expired EP0087645B1 (fr) 1982-03-02 1983-02-11 Dispositif de nettoyage des tubes des échangeurs de chaleur et procédé d'utilisation d'un tel dispositif

Country Status (6)

Country Link
US (1) US4566533A (fr)
EP (1) EP0087645B1 (fr)
JP (2) JPS58165000A (fr)
AU (1) AU1184583A (fr)
DE (2) DE3207466A1 (fr)
ZA (1) ZA831372B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0107705A1 (fr) * 1982-04-26 1984-05-09 Concentration Specialists Inc Procédé pour la fabrication d'une masse de liquide concentré et cristals de glace et sous-ensemble pour cela.
GB2135751A (en) * 1982-10-18 1984-09-05 Atp Technology Improvements to devices for supplying heat exchangers with cleaning bodies and for recovering these bodies
EP0148509A1 (fr) * 1984-01-09 1985-07-17 GEA Energiesystemtechnik GmbH & Co. Circuit d'eau de refroidissement d'un échangeur de chaleur à tubes avec un dispositif pour introduire et séparer des éléments nettoyants sphériques
GB2207972A (en) * 1987-08-01 1989-02-15 Shizuo Sagawa Cleaning pigs
CN104596349A (zh) * 2015-02-02 2015-05-06 蒋平锁 流体脉动式汇流器
CN113048827A (zh) * 2021-01-03 2021-06-29 温州捷合郸科技有限公司 一种回流弹击式自清理型烟气换热管

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DE3403198C2 (de) * 1984-01-31 1986-09-11 Josef Dipl.-Ing. 4006 Erkrath Koller Vorrichtung zum Reinigen der Röhren von Wärmetauschern mittels Reinigungskörpern
DE3562050D1 (en) * 1985-05-03 1988-05-05 Gea Energiesystemtechnik Gmbh Sluice for collecting spherical cleaning bodies
EP0199856B1 (fr) * 1985-05-03 1988-07-27 GEA Energiesystemtechnik GmbH & Co. Sas pour recueillir des corps nettoyants sphériques
FR2716530B1 (fr) * 1994-02-24 1996-07-12 Beaudrey & Cie Dispositif d'interception pour éléments solides circulant dans un échangeur de chaleur pour le nettoyage de celui-ci.
US5890531A (en) * 1995-04-18 1999-04-06 Noram Engineering And Constructors Ltd. Apparatus for the self-cleaning of process tubes
US6569255B2 (en) 1998-09-24 2003-05-27 On Stream Technologies Inc. Pig and method for cleaning tubes
US6170493B1 (en) 1997-10-31 2001-01-09 Orlande Sivacoe Method of cleaning a heater
US6913071B1 (en) * 2004-05-03 2005-07-05 C.Q.M. Ltd. Ball trap with safety-release gate
WO2006068929A1 (fr) * 2004-12-20 2006-06-29 Shell Internationale Research Maatschappij B.V. Procede et dispositif pour systeme de production sous-marin d’hydrocarbures a ecoulement a froid
GB2436038B (en) * 2005-01-12 2010-12-08 Shell Int Research Method for transporting hydrocarbons
US8863820B2 (en) * 2010-05-12 2014-10-21 Invodane Engineering Ltd Measurement device for heat exchanger and process for measuring performance of a heat exchanger
FR3038041B1 (fr) * 2015-06-26 2017-07-21 E Beaudrey Et Cie Systeme d'interception et de collecte de corps nettoyants par balayage alternatif
FR3068122B1 (fr) * 2017-06-23 2019-07-19 Eugene B Installation de nettoyage d'echangeur thermique et systeme associe
CN107621193B (zh) * 2017-10-31 2023-11-17 天津华电北宸分布式能源有限公司 一种胶球收球设备

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0107705A1 (fr) * 1982-04-26 1984-05-09 Concentration Specialists Inc Procédé pour la fabrication d'une masse de liquide concentré et cristals de glace et sous-ensemble pour cela.
EP0107705A4 (fr) * 1982-04-26 1984-09-11 Concentration Specialists Inc Procédé pour la fabrication d'une masse de liquide concentré et cristals de glace et sous-ensemble pour cela.
GB2135751A (en) * 1982-10-18 1984-09-05 Atp Technology Improvements to devices for supplying heat exchangers with cleaning bodies and for recovering these bodies
EP0148509A1 (fr) * 1984-01-09 1985-07-17 GEA Energiesystemtechnik GmbH & Co. Circuit d'eau de refroidissement d'un échangeur de chaleur à tubes avec un dispositif pour introduire et séparer des éléments nettoyants sphériques
GB2207972A (en) * 1987-08-01 1989-02-15 Shizuo Sagawa Cleaning pigs
GB2207972B (en) * 1987-08-01 1991-10-16 Shizuo Sagawa Pipe cleaning method
CN104596349A (zh) * 2015-02-02 2015-05-06 蒋平锁 流体脉动式汇流器
CN104596349B (zh) * 2015-02-02 2016-06-08 蒋平锁 流体脉动式汇流器
CN113048827A (zh) * 2021-01-03 2021-06-29 温州捷合郸科技有限公司 一种回流弹击式自清理型烟气换热管

Also Published As

Publication number Publication date
ZA831372B (en) 1983-12-28
EP0087645B1 (fr) 1985-10-16
DE3207466A1 (de) 1983-09-15
JPS58165000A (ja) 1983-09-29
AU1184583A (en) 1983-09-08
US4566533A (en) 1986-01-28
JPS60111895U (ja) 1985-07-29
EP0087645A3 (en) 1984-03-28
DE3361006D1 (en) 1985-11-21

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