EP0358921A1 - Dispositif à faisceau tubulaire - Google Patents

Dispositif à faisceau tubulaire Download PDF

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Publication number
EP0358921A1
EP0358921A1 EP19890114306 EP89114306A EP0358921A1 EP 0358921 A1 EP0358921 A1 EP 0358921A1 EP 19890114306 EP19890114306 EP 19890114306 EP 89114306 A EP89114306 A EP 89114306A EP 0358921 A1 EP0358921 A1 EP 0358921A1
Authority
EP
European Patent Office
Prior art keywords
medium
treated
solid particles
tube bundle
jet pump
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
EP19890114306
Other languages
German (de)
English (en)
Other versions
EP0358921B1 (fr
Inventor
Rainer Dr.-Ing. Greffrath
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.)
SGL Technik GmbH
Original Assignee
Krupp Industietechnik GmbH
Dorr Oliver Deutschland 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 Krupp Industietechnik GmbH, Dorr Oliver Deutschland GmbH filed Critical Krupp Industietechnik GmbH
Publication of EP0358921A1 publication Critical patent/EP0358921A1/fr
Application granted granted Critical
Publication of EP0358921B1 publication Critical patent/EP0358921B1/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
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/12—Fluid-propelled scrapers, bullets, or like solid bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D13/00—Heat-exchange apparatus using a fluidised bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers

Definitions

  • the invention relates to a method and a device for operating a tube bundle apparatus for heat transfer with heat exchanger tubes arranged between tube plates and an inlet and an outlet chamber, in which, together with the medium to be treated, abrasive solid particles are passed through the heat exchanger tubes.
  • Tube bundle apparatuses for the transfer of heat from a liquid or gaseous medium to a liquid, in which foreign particles which are insoluble in this liquid are passed through the heating pipes together with the medium to be treated are known and are described, for example, in DE-PS 28 15 825, DE -OS 34 32 864, DE-OS 36 25 408 or EP 0 132 873 B1.
  • the foreign or solid particles serve to keep the inside of the heating pipes free of deposits and crystal formation and are normally circulated.
  • the above prior art describes the use of this so-called fluidized bed technology for the incrustation and contamination-free operation of heat-transferring apparatus. These are always arrangements with a standing or moving fluidized bed. With these arrangements, the particles are significantly heavier than the one to be warmed up or medium to be cooled.
  • the tubes are always arranged vertically and are flowed through from bottom to top, the flow velocity of the liquid having to be in a certain ratio to the sinking speed of the particles in the still liquid.
  • the backflow of the particles from the upper water chamber to the lower is controlled by suitable hydraulic internals.
  • the invention has for its object to improve the possible uses of tube bundle apparatus by avoiding the difficulties mentioned above and to reliably avoid deposits and incrustations regardless of the installation position of such apparatus, i.e. in particular to achieve a uniform abrasive effect of the solid particles even when the tube bundle is lying flat.
  • the medium to be treated, together with the abrasive solid particles is fed to the inlet chamber by means of a jet pump and the abrasive solid particles within the outlet chamber are mechanically separated from the treated medium and together with a partial flow of the treated medium less than 20%, preferably 5 to 10%, of the total volume of the jet pump.
  • the solid particles are conveyed by a jet pump in the circuit. Together with a small partial flow of the liquid medium, they are sucked in by the jet pump from the outlet chamber of the tube bundle apparatus and mixed with the stream of the medium to be treated that feeds the jet pump.
  • This, together with the solid particles distributed homogeneously therein is fed via a return pipe to the inlet chamber of the tube bundle apparatus and flows through the heat exchanger tubes, where, depending on the process, heat is added or removed.
  • the flow through the tubes is turbulent at the speed usual for heat exchangers.
  • the entrained, abrasive solid particles collide against the inside of the pipes due to the turbulent flow and thus prevent incrustations, dirt and caking.
  • the foreign particles are separated from the treated medium by means of a mechanical separation device arranged in the outlet chamber.
  • the solid particles are thus discharged and introduced using a jet pump, the medium to be treated itself serving as the propellant.
  • the jet pump sucks off a small partial flow of less than 20%, preferably 5 to 10%, of the medium emerging from the tube bundle, which is just sufficient to suck off the particles transported through the tubes with the liquid, and compresses this partial flow to the inlet pressure of the heat exchanger .
  • the method according to the invention has the advantage of an extremely simple construction, in particular no moving parts or devices come into contact with the mixture of medium and abrasive solids, which is of crucial importance for the operational safety and the trouble-free operation of such tube bundle apparatus.
  • Another advantage is that entrainment or discharge of solid particles is reliably avoided in this process. It is insensitive to inadvertently excessive flow rates and also enables a horizontal arrangement of the tube bundle apparatus.
  • the tube bundle apparatus can be used without the method according to the invention other can also be operated horizontally installed. It also enables a multi-flow design of the tube bundle apparatus.
  • the density of the foreign matter particles is the same or only slightly greater than the medium to be treated, they follow the flow through the Heat exchangers with no problems even with greater deflection or large differences in speed, which is beneficial for the design freedom with regard to heat exchangers and lines. It is also advantageous that the flow rates in the process according to the invention outside the heat exchanger tubes can be lower than in conventional processes, since there is no risk of segregation and settling. This means lower pressure losses and thus cost savings. While in the previous methods for maintaining a very specific sink rate of the particles, depending on the medium, a certain particle size had to be observed, a further advantage of the method according to the invention is that the size of the solid particles can be chosen freely.
  • the solid particles flow at the same speed as the liquid and therefore also follow the deflections that may be present in heat exchangers.
  • Existing heat exchangers can thus also be converted or retrofitted to the method according to the invention without any procedural problems.
  • the number of solid particles can also be freely selected within wide limits and can be chosen to be smaller or larger depending on the tendency of the medium to be treated to become dirty, which represents a considerable process advantage.
  • the special design of the method offers Claim 3 advantages, since the admixture of the foreign matter particles can be spatially separated from the heat transfer. Especially when using foreign matter particles with the same or at most 50% higher specific weight compared to the liquid, there are no separation problems even with a longer return line.
  • An advantageous development of the method according to the invention is that only as large a part of the medium to be treated is fed to the jet pump as is necessary as a driving jet for the returned amount of treated medium, and the rest of the medium is fed directly to the inlet chamber with a separate pump . This ensures that the dimensions of the jet pump can be reduced. However, this advantage must be bought with the installation of a second pump. Depending on the medium to be treated and its viscosity, however, it may be more advantageous to pass the entire volume flow of the medium to be treated through the jet pump, since the driving pressure and the flow rate are lower, and thus the mechanical load on the jet pump and solid particles is kept low becomes.
  • a process control according to claim 5 is particularly interesting from a process engineering point of view. For example, this results in the shortest possible flow paths and thus a reduction in flow losses.
  • the central feedback and the internal jet pump also result in low heat losses.
  • saving energy and reducing heat loss mean an improvement in efficiency for the overall process.
  • a device according to claim 6 is advantageously used to carry out the method according to one of claims 1 to 4.
  • the treated medium leaves the tube bundle apparatus, whereas the solid particles are constantly circulated.
  • a jet pump to suck the solid particles out of the treated medium and to add them to the medium to be treated, the operational safety and susceptibility to malfunction of such a system are significantly improved, since no rotating or moving parts come into contact with the abrasive mixture.
  • the separating device is designed as a flat sieve, slotted sieve or rake-like, whereby it can be advantageous to make it roof-shaped or to arrange it inclined to the direction of flow. This enables a targeted movement of the solid particles during separation. That means despite the nonexistent or only very small Differences in density between particles and medium ensure that the particles are transported to the discharge nozzle.
  • a slotted sieve inclined against the direction of flow or a rake has the advantage that the particles do not stick, but due to the inclination of the rake a downward resulting force is exerted on the particles, so that they also move along the rake without the influence of gravity move to the discharge nozzle.
  • a device according to claim 11 is advantageous, by means of which a particularly space-saving, compact system design is possible.
  • the advantage of this arrangement can be seen in the elimination of the connecting pipelines between the jet pump and the tube bundle apparatus, the efficiency of the jet pump being improved at the same time.
  • Due to the internal return tube designed as a diffuser the outer diameter of the tube bundle apparatus increases only insignificantly with the same heat exchange surface.
  • the overall length or height (depending on the installation position) should not increase or increase only slightly due to the internal jet pump according to the invention, since the outlet chamber anyway has a relatively large volume in terms of flow and construction.
  • the separating device in order to minimize the space required for the jet pump, it is provided according to a further development of the invention to design the separating device as a conical sieve, so that no additional space is required and there is sufficient space to arrange the nozzle in the outlet chamber.
  • the fact that in this case the supply of the medium to be treated and the discharge of the treated medium at the same end of the tube bundle apparatus may enable a particularly favorable pipeline routing without the need for thermal expansion compensation.
  • the tube bundle apparatus consists of a container jacket 1, in which the tube sheets 2 and 3 are arranged with intermediate heat exchanger tubes 4 and the container bases 5 and 6 with the inlet and outlet nozzles 7 and 8.
  • the heat exchanger tubes 4 are made of a heating or cooling medium washed around, which is fed via a nozzle 9, either as shown here in Co-current or counter-current flows, and is discharged via a nozzle 10.
  • the space between the tube plate 2 and the container base 5 represents the inlet chamber 11 for the medium to be treated and the space between the tube plate 3 and the container base 6 represents the outlet chamber 12 for the medium being treated.
  • a separation device 13 shown here schematically as a flat screen, is arranged, with which the solid particles 14 are separated from the treated medium.
  • the treated medium freed from the abrasive solid particles 14, leaves the tube bundle apparatus via the outlet nozzle 8, while the solid particles are withdrawn from the tube bundle apparatus via the discharge nozzle 15. They are sucked in by a jet pump 16 together with a small partial stream of the treated medium, which is just sufficient for the transport, ie the warmed or cooled liquid.
  • the jet pump 16 essentially consists of a nozzle 17 and a diffuser 18, which at the same time forms part of the return line 19.
  • the main flow of the medium to be treated is fed to the tube bundle apparatus by the pump 20.
  • a partial flow of the medium to be treated is supplied to the jet pump 16 by a second pump 21 as the driving medium.
  • the solid particles 14, which were separated from the treated medium in the outlet chamber 12 by the separating device 13, are conducted together with a small partial flow of the treated medium via the return line 19 and the jet pump 16 in a constant cycle.
  • a relatively small jet pump is used in this procedure.
  • the jet pump 16 is acted upon by the pump 21 with the entire volume flow of the medium to be treated; that makes a larger jet pump necessary.
  • the second pump is not required.
  • Fig. 4 shows an alternative embodiment of the invention, wherein the jet pump 16 is arranged within the tube bundle apparatus.
  • the nozzle 17 of the jet pump 16 is located within the outlet chamber 12, the diffuser 18 being arranged centrally within the tube bundle formed from the heat exchanger tubes 4 as a return and being connected on the one hand to the inlet chamber 11 and on the other hand to the outlet chamber 12.
  • a conical sieve is provided as a separating device 13 for the abrasive solid particles 14 within the outlet chamber 12.
  • the medium to be treated is fed to the nozzle 17 via the pump 21, the solid particles being sucked out of the outlet chamber 12 and passed together with the medium to be treated via the heat exchanger tubes 4.
  • the treated medium is discharged on the same side of the tube bundle apparatus on which the material to be treated is fed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Cleaning In General (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
EP19890114306 1988-09-15 1989-08-03 Dispositif à faisceau tubulaire Expired - Lifetime EP0358921B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883831385 DE3831385C2 (de) 1988-09-15 1988-09-15 Verfahren und Vorrichtung zum Betreiben eines Rohrbündel-Apparates
DE3831385 1988-09-15

Publications (2)

Publication Number Publication Date
EP0358921A1 true EP0358921A1 (fr) 1990-03-21
EP0358921B1 EP0358921B1 (fr) 1992-11-04

Family

ID=6363015

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890114306 Expired - Lifetime EP0358921B1 (fr) 1988-09-15 1989-08-03 Dispositif à faisceau tubulaire

Country Status (2)

Country Link
EP (1) EP0358921B1 (fr)
DE (1) DE3831385C2 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2318165A (en) * 1996-10-10 1998-04-15 Biofence Ltd Cleaning the interiors of conduits
US6570167B1 (en) 1998-01-29 2003-05-27 Kenneth Ray Bryer Apparatus for treating a liquid
NL1019670C2 (nl) * 2001-12-27 2003-07-01 Klarex Beheer B V Inrichting voor het uitvoeren van een fysisch en/of chemisch proces, zoals een warmtewisselaar.
FR2863697A1 (fr) * 2003-12-12 2005-06-17 Technos Et Cie Echangeur de chaleur muni de moyens de nettoyage.
CN104713413A (zh) * 2013-12-13 2015-06-17 衢州学院 一种换热器在线强化除垢装置
WO2015183641A1 (fr) * 2014-05-26 2015-12-03 Ineos Europe Ag Refroidisseur d'effluent dans la fabrication d'acrylonitrile
CN107764108A (zh) * 2016-08-23 2018-03-06 中国石油化工股份有限公司 固体颗粒有效循环的流化床换热器
CN119573421A (zh) * 2024-11-28 2025-03-07 营口庆营石油化工设备有限公司 一种石油催化反应生产中的水循环换热器

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4010478A1 (de) * 1990-03-31 1991-10-02 Krupp Buckau Maschinenbau Gmbh Vorrichtung zur waermeuebertragung
DE4016043A1 (de) * 1990-05-18 1991-11-21 Krupp Buckau Maschinenbau Gmbh Vorrichtung zur uebertragung von waerme
DE102009014786A1 (de) 2008-08-18 2010-02-25 Coperion Gmbh Bearbeitungsanlage für Schüttgut
CN106440869B (zh) * 2016-08-30 2019-09-27 朱清敏 自清洁循环换热装置
CN114604980A (zh) * 2020-12-08 2022-06-10 淄博环能海臣环保技术服务有限公司 一种原水加热除硬水处理装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE569651A (fr) *
FR646861A (fr) * 1927-12-20 1928-11-16 Cie Des Surchauffeurs Perfectionnements aux appareils destinés au nettoyage des tubes de chaudière
DE1126060B (de) * 1957-05-23 1962-03-22 Steinmueller Gmbh L & C Kugelregenreinigungsanlage
DE1247359B (de) * 1962-01-22 1967-08-17 Hitachi Ltd Reinigungsvorrichtung fuer Roehren-Waermetauscher
EP0132873A2 (fr) * 1983-07-22 1985-02-13 Eskla B.V. Dispositif pour la réalisation de procédés physiques et/ou chimiques, en particulier d'un échangeur de chaleur du type continu
DE3432864A1 (de) * 1984-09-07 1986-03-20 Robert Prof. Dr.-Ing. 5100 Aachen Rautenbach Waermetauscher fuer die physikalische und/oder chemische behandlung einer fluessigkeit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD8154A (fr) *
NL7703939A (nl) * 1977-04-12 1978-10-16 Esmil Bv Werkwijze en inrichting voor het uitwisselen van warmte.
DE3131124C1 (de) * 1981-08-06 1982-10-28 Taprogge Gesellschaft mbH, 4000 Düsseldorf Reinigungsfangsieb für Kondensator-Reinigungsanlagen mit Kühlwasser-Reinigungskreislauf
DE3625408A1 (de) * 1986-07-26 1988-02-04 Krupp Gmbh Verfahren zur vermeidung von ablagerungen in senkrecht stehenden verdampferheizrohren und vorrichtung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE569651A (fr) *
FR646861A (fr) * 1927-12-20 1928-11-16 Cie Des Surchauffeurs Perfectionnements aux appareils destinés au nettoyage des tubes de chaudière
DE1126060B (de) * 1957-05-23 1962-03-22 Steinmueller Gmbh L & C Kugelregenreinigungsanlage
DE1247359B (de) * 1962-01-22 1967-08-17 Hitachi Ltd Reinigungsvorrichtung fuer Roehren-Waermetauscher
EP0132873A2 (fr) * 1983-07-22 1985-02-13 Eskla B.V. Dispositif pour la réalisation de procédés physiques et/ou chimiques, en particulier d'un échangeur de chaleur du type continu
DE3432864A1 (de) * 1984-09-07 1986-03-20 Robert Prof. Dr.-Ing. 5100 Aachen Rautenbach Waermetauscher fuer die physikalische und/oder chemische behandlung einer fluessigkeit

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2318165A (en) * 1996-10-10 1998-04-15 Biofence Ltd Cleaning the interiors of conduits
GB2318165B (en) * 1996-10-10 2000-07-12 Biofence Ltd Photobioreactor having mobile cleaning means
US6570167B1 (en) 1998-01-29 2003-05-27 Kenneth Ray Bryer Apparatus for treating a liquid
NL1019670C2 (nl) * 2001-12-27 2003-07-01 Klarex Beheer B V Inrichting voor het uitvoeren van een fysisch en/of chemisch proces, zoals een warmtewisselaar.
WO2003056266A1 (fr) * 2001-12-27 2003-07-10 Klarex Beheer B.V. Appareil pour procede physique et/ou chimique, tel que: echangeur de chaleur
FR2863697A1 (fr) * 2003-12-12 2005-06-17 Technos Et Cie Echangeur de chaleur muni de moyens de nettoyage.
WO2005066573A1 (fr) * 2003-12-12 2005-07-21 Technos Et Compagnie Echangeur de chaleur muni de moyens de nettoyage
CN104713413A (zh) * 2013-12-13 2015-06-17 衢州学院 一种换热器在线强化除垢装置
WO2015183641A1 (fr) * 2014-05-26 2015-12-03 Ineos Europe Ag Refroidisseur d'effluent dans la fabrication d'acrylonitrile
CN107764108A (zh) * 2016-08-23 2018-03-06 中国石油化工股份有限公司 固体颗粒有效循环的流化床换热器
CN107764108B (zh) * 2016-08-23 2019-05-14 中国石油化工股份有限公司 固体颗粒有效循环的流化床换热器
CN119573421A (zh) * 2024-11-28 2025-03-07 营口庆营石油化工设备有限公司 一种石油催化反应生产中的水循环换热器

Also Published As

Publication number Publication date
EP0358921B1 (fr) 1992-11-04
DE3831385A1 (de) 1990-03-29
DE3831385C2 (de) 1997-06-12

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