EP0357907B1 - Wärmetauscher - Google Patents

Wärmetauscher Download PDF

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Publication number
EP0357907B1
EP0357907B1 EP19890112632 EP89112632A EP0357907B1 EP 0357907 B1 EP0357907 B1 EP 0357907B1 EP 19890112632 EP19890112632 EP 19890112632 EP 89112632 A EP89112632 A EP 89112632A EP 0357907 B1 EP0357907 B1 EP 0357907B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
fluid
exit
valve
tubes
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
EP19890112632
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0357907A1 (de
Inventor
Herbert Krips
Miroslan Dr. Podhorsky
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.)
Balcke Duerr AG
Original Assignee
Balcke Duerr 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
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Application filed by Balcke Duerr AG filed Critical Balcke Duerr AG
Publication of EP0357907A1 publication Critical patent/EP0357907A1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1884—Hot gas heating tube boilers with one or more heating tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B35/00—Control systems for steam boilers
    • F22B35/007—Control systems for waste heat boilers

Definitions

  • Heat exchangers in particular waste heat steam generators, with heat exchanger tubes running between two end chambers, through which a fluid involved in the heat exchange flows and flowed against by another fluid supplied to the housing surrounding the heat exchanger tubes, and with an overflow tube connecting the chambers parallel to the heat exchanger tubes, through which, in order to maintain a predeterminable outlet temperature of one of the two fluids, a variable partial flow of the fluid flowing between the chambers can be passed through, while essentially avoiding heat exchange with the other fluid, and which is provided with a valve arrangement for changing its flow cross-section, which has a flow cross-section of the overflow pipe in a first end position of the valve arrangement closing valve plate and a valve ring connected to the valve plate via a valve rod, from which the overflow Fluid leaving the tube is flowed through and in a second, different end position of the valve arrangement closes an outlet opening formed in the outlet-side chamber for the fluid emerging from the heat exchanger tubes.
  • a heat exchanger of the type described above is known from DE-A-2846455.
  • the outlet-side chamber of the heat exchanger is divided into an outflow space and a mixing space by a partition wall running perpendicular to the heat exchanger tubes.
  • the partial flow emerging from the heat exchanger tubes is mixed with the partial flow of the same fluid passing through the overflow tube, the respective proportions of the two partial flows being set by the position of the valve arrangement.
  • This known embodiment has the disadvantage that the mixing of the two sub-streams is associated with a high pressure loss and that a relatively large mixing space must be provided in order to achieve a reasonably satisfactory mixing of the two sub-streams without it being possible to ensure that the out the fluid flow exiting the outlet connection of the heat exchanger does not consist of a hot core flow and a colder edge flow.
  • the invention has for its object to provide a heat exchanger of the type described above, the mixing device formed at the outlet end of the overflow pipe guarantees low-loss and intensive mixing of the partial flows with a significantly reduced space requirement for the mixing section.
  • the solution to this problem by the invention is characterized in that the outlet opening is formed on a collecting cone covering the heat exchanger tubes, which cooperates with the valve ring, and in that the valve ring is provided with a conical outlet surface provided with a plurality of through openings, the inclination of which The longitudinal axis of the heat exchanger corresponds approximately to the inclination of the collecting cone.
  • a mixing device is created in which the partial flow emerging from the heat exchanger tubes is specifically fed through the collecting cone to the outlet opening of the end chamber, this partial flow passing through an annular flow cross section which is formed on the one hand by the wall of the collecting cone and on the other hand by the valve ring becomes.
  • the partial flow of the same fluid that emerges from the overflow pipe is introduced into this partial flow directed towards the outlet opening by the inclination of the collecting cone. Since this outlet takes place from a conical outlet surface of the valve ring, the inclination of which to the longitudinal axis of the heat exchanger roughly corresponds to the inclination of the collecting cone, this results in intensive mixing of the two partial flows within a short mixing section.
  • the conical outlet surface is provided with a large number of through openings which divide the fluid emerging from the overflow pipe into a large number of small flow threads, which are distributed over the annular flow cross section between the collecting cone and the conical outlet surface and are mixed into the partial flow coming from the heat exchanger pipes.
  • the quantitative change in the two partial flows can - as is known - be carried out by adjusting the valve ring relative to the collecting cone on the one hand and the valve plate relative to the overflow pipe on the other hand, so that a predetermined outlet temperature of one of the two fluids participating in the heat exchange can be kept constant within narrow limits.
  • the outlet-side chamber is formed by the collecting cone, the outlet opening of which is at the same time designed as an outlet connection of the heat exchanger. If a sufficiently large space is available and / or a type of calming zone is to be formed after the mixing section, the collecting cone can, according to a further feature of the invention, also be arranged within the outlet-side chamber, which in turn is provided with an outlet nozzle.
  • the shortened in Fig. 1 heat exchanger has a cylindrical housing 1, at one end of which is provided with an insulation 2a inlet chamber 2 for the heat-emitting fluid F1.
  • This fluid F1 is passed through heat exchanger tubes 3, which extend between the inlet chamber 2 and an outlet-side chamber 4.
  • the cooled fluid F1 leaves the outlet chamber 4 through an outlet 4a.
  • the heat-absorbing fluid F2 is supplied to the housing 1 surrounding the heat exchanger tubes 3 through a nozzle 1a. It acts on the heat exchanger tubes from the outside and, after being heated, leaves the housing 1 through a connector 1b.
  • the inlet chamber 2 and the outlet-side chamber 4 are connected to one another parallel to the heat exchanger tubes 3 by an overflow tube 5, which is provided with insulation 5a.
  • an overflow tube 5 which is provided with insulation 5a.
  • a valve arrangement is formed, which is shown enlarged in Figures 2 and 3.
  • This valve arrangement comprises a valve plate 6, with which the flow cross section of the overflow pipe 5 can be completely closed in one end position and which is arranged on a valve rod 7.
  • a valve ring 8 is also attached, which is flowed through by the fluid F 1 leaving the overflow pipe 5 and which closes an outlet opening 9 in the other end position of the valve arrangement, which is formed in a collecting cone 10.
  • This collecting cone 10 is arranged in the outlet-side chamber 4 in such a way that the outlet openings of all heat exchanger tubes 3 open out inside the collecting cone 10. In this way, the collection cone 10 and its outlet opening 9 flows through the entirety of that portion of the fluid F 1 that emerges from the heat exchanger tubes 3.
  • the valve rod 7 is actuated by a servomotor 11 which is arranged on the outside of the outlet-side chamber 4.
  • a servomotor 11 which is arranged on the outside of the outlet-side chamber 4.
  • the valve rod 7 can be transferred into two end positions and all intermediate positions.
  • the valve plate 6 closes the entire cross section of the overflow pipe 5.
  • the heat-emitting fluid F 1 flows through the heat exchanger pipes 3; it enters the collecting cone 10 and leaves it through the outlet opening 9.
  • the valve plate 6 releases the flow cross section of the overflow pipe 5, whereas the valve ring 8 rests on the collecting cone 10 in an area which surrounds the outlet opening 9.
  • the heat exchanger tubes 3 are closed on their outlet side by the backwater; the heat-emitting fluid F1 flows completely through the overflow pipe 5 and passes through the interior of the valve ring 8 into the outlet opening 9. Since the overflow pipe 5 is provided with insulation 5a, heat exchange between the heat-emitting fluid F1 and the heat-absorbing fluid F2 is in this end position almost prevented.
  • valve assembly described above can therefore be used to control either the outlet temperature of the fluid F1 or the fluid F2 within narrow limits.
  • the valve ring 8 is provided with a conical outlet surface 8 a, which is provided with a plurality of through openings 8 b Inclination to the longitudinal axis of the heat exchanger corresponds approximately to the inclination of the collecting cone 10 to this longitudinal axis of the heat exchanger. In this way, as can be seen in FIGS. 2 and 3, the two partial streams are thoroughly mixed before they leave the outlet opening 9 of the collecting cone 10.
  • the partial quantity emerging from the overflow pipe 5 is bundled through the through openings 8b in the manner of a shower Partial stream injected, which emerges from the collecting cone 10.
  • the outlet-side chamber 4 is therefore only provided to make the flow more uniform, without mixing of the two partial flows of the heat-emitting fluid F 1 taking place in this outlet-side chamber 4.
  • valve arrangement in the exemplary embodiment according to FIG. 3 corresponds to the valve arrangement in the first exemplary embodiment according to FIGS. 1 and 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Multiple-Way Valves (AREA)
EP19890112632 1988-09-06 1989-07-11 Wärmetauscher Expired - Lifetime EP0357907B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3830248 1988-09-06
DE19883830248 DE3830248C1 (zh) 1988-09-06 1988-09-06

Publications (2)

Publication Number Publication Date
EP0357907A1 EP0357907A1 (de) 1990-03-14
EP0357907B1 true EP0357907B1 (de) 1991-11-13

Family

ID=6362368

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890112632 Expired - Lifetime EP0357907B1 (de) 1988-09-06 1989-07-11 Wärmetauscher

Country Status (3)

Country Link
EP (1) EP0357907B1 (zh)
DE (1) DE3830248C1 (zh)
ES (1) ES2027812T3 (zh)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK171423B1 (da) * 1993-03-26 1996-10-21 Topsoe Haldor As Spildevarmekedel
DK173540B1 (da) * 1994-06-29 2001-02-05 Topsoe Haldor As Spildvarmekedel
GB9812238D0 (en) 1998-06-08 1998-08-05 Schack Engineering Gb Limited Heat exchanger
DE10311529B3 (de) * 2003-03-17 2004-09-16 Tuchenhagen Dairy Systems Gmbh Vorrichtung zur Einflussnahme auf den Anströmbereich einer Rohrträgerplatte eines Rohrbündel-Wärmeaustauschers
DE102005057674B4 (de) * 2005-12-01 2008-05-08 Alstom Technology Ltd. Abhitzekessel
DE102005059463B4 (de) * 2005-12-13 2009-12-24 Gea Tds Gmbh Vorrichtung zur Einflussnahme auf die Strömung im Bereich einer Rohrträgerplatte eines Rohrbündel-Wärmeaustauschers
MX2013003048A (es) 2010-09-30 2013-05-30 Haldor Topsoe As Caldera de calor residual.
EP2852804B1 (en) * 2012-05-09 2016-01-06 Haldor Topsøe A/S Waste heat boiler with bypass and mixer
US20230047551A1 (en) * 2020-01-10 2023-02-16 Citech Energy Recovery System Malaysia Sdn. Bhd. Heat exchanger

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1303092A (zh) * 1970-08-29 1973-01-17
GB1333980A (en) * 1972-07-28 1973-10-17 Clarke Chapman John Thompson L Boiler
DE2846455C2 (de) * 1978-10-23 1980-07-31 Borsig Gmbh, 1000 Berlin Rohrbündel-Wärmetauscher mit gleichbleibender Austrittstemperatur eines der beiden Medien

Also Published As

Publication number Publication date
ES2027812T3 (es) 1992-06-16
EP0357907A1 (de) 1990-03-14
DE3830248C1 (zh) 1990-01-18

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