EP3730890B1 - Plattenwärmeübertrager - Google Patents

Plattenwärmeübertrager Download PDF

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Publication number
EP3730890B1
EP3730890B1 EP20000005.7A EP20000005A EP3730890B1 EP 3730890 B1 EP3730890 B1 EP 3730890B1 EP 20000005 A EP20000005 A EP 20000005A EP 3730890 B1 EP3730890 B1 EP 3730890B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
medium
metal sheets
pair
openings
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.)
Active
Application number
EP20000005.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3730890A1 (de
Inventor
Zbyszek Szeliga
Bohumír Cech
Pavel Dvorák
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.)
Vysoka Skola Banska Technicka Univerzita Ostrava
Original Assignee
Vysoka Skola Banska Technicka Univerzita Ostrava
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Application filed by Vysoka Skola Banska Technicka Univerzita Ostrava filed Critical Vysoka Skola Banska Technicka Univerzita Ostrava
Publication of EP3730890A1 publication Critical patent/EP3730890A1/de
Application granted granted Critical
Publication of EP3730890B1 publication Critical patent/EP3730890B1/de
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Classifications

    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F28D21/0005—Recuperative heat exchangers the heat being recuperated from exhaust gases for domestic or space-heating systems
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F28D21/001—Recuperative heat exchangers the heat being recuperated from exhaust gases for thermal power plants or industrial processes
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0014—Recuperative heat exchangers the heat being recuperated from waste air or from vapors
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0037—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2215/00—Preventing emissions
    • F23J2215/10—Nitrogen; Compounds thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2219/00—Treatment devices
    • F23J2219/10—Catalytic reduction devices

Definitions

  • the invention relates to the design of a plate heat exchanger, which is intended in energy technology for heat transfer between two gaseous media of different temperatures, ie between two flue gases or between a flue gas and the air. It is a recuperative heat exchanger that is used in particular for the reduction of NO x emissions in flue gases by means of an SCR method (selective catalythic reduction) in purified and sulfur-free flue gases.
  • the heat exchanger can also be used to preheat the combustion air.
  • Plate heat exchangers are known which are composed of metal sheets, some of which have a trapezoidal shape. These are mainly radiators for space heating.
  • the GB 1238491 discloses a plate heat exchanger formed by a bundle of pairs of adjacent plates, the central areas of which are trapezoidal corrugated in the direction of the flow, with the edge areas being smooth.
  • the waves in the trapezoidal area of two adjacent plates are offset against one another and in this position form alternating channels for two heat-exchanging media.
  • One medium is guided in a straight line through the channels, while the other is fed in sideways in one of the edge areas and discharged sideways again from the other edge area.
  • the heat exchanger is made of plastic and is intended for smaller amounts of gas at a relatively low temperature.
  • JP-H09138082A shows the features of the preamble of claim 1.
  • the invention is based on the object of designing a heat exchanger intended for energy technology from accessible and affordable elements, which enables a large amount of heat to be exchanged between gaseous media with temperatures of up to 300 ° C.
  • the plate heat exchanger comprises a plurality of with Pairs of parallel thermally conductive walls arranged at a distance, which are formed in each pair by reversely oriented trapezoidal sheets with alternating channels and webs.
  • the webs are in each pair against one another, and the channels form channels for the flow of the second medium.
  • the gaps between the individual pairs of sheets, which are covered over the entire circumference, are used for the flow of the first medium.
  • An opening for the supply and discharge of the first medium is formed at both ends of the web of each trapezoidal sheet.
  • the metal sheets of each pair are gas-tightly connected at the lateral edges and at the circumference of the openings, and the facing of the gaps is gas-tight.
  • spacer elements can be inserted between the metal sheets.
  • the channels formed in the pair of sheets open into a feed or discharge pipe for the second medium, and the openings in the webs of the edge sheets open into a feed or discharge manifold for the first medium.
  • distribution channels can be connected to the supply manifold for the first medium, which channels go through the openings in the webs.
  • the gaps between the pairs of sheets are provided with closable cleaning openings at the bottom of the sides.
  • the heat exchanger according to the invention is formed by a plurality of spaced-apart pairs of parallel heat-conducting walls, see FIG. Figs. 1 and 2 .
  • the walls of each pair 1 are formed by reversely oriented trapezoidal sheets 2 with alternating grooves 3 and webs 4 .
  • the webs 4 in each pair 1 lie against one another, and the channels 3 form channels 5 for the flow of the second medium.
  • Gaps 6 located between the individual sheet metal pairs 1 are used for the flow of the first medium.
  • an opening 7 is formed for the supply and discharge of the first medium.
  • the sheets 2 of each pair 1 are gas-tightly connected at the lateral edges 8 and on the circumference 9 of the openings 7 , and the gaps 6 are faced over the entire circumference, at the end with a profiled facing strip 10 , the facing of the gaps 6 being gas-sealed.
  • the channels 5 formed in the pair of sheets 1 open into a supply or discharge pipe (not shown) of the second medium, and the openings 7 in the webs 4 of the edge plates 2 in a supply or discharge manifold 11 , 12 of the first medium, see FIG . Fig. 6 .
  • Distribution channels 13 which go through the openings 7 in the webs 4, are connected to the supply collecting pipe 11 of the first medium.
  • the facings of the columns 6 between the pairs of sheets 1 are provided with closable cleaning openings at the bottom of the sides, which means cleaning the Columns 6 allows during maintenance.
  • the present heat exchanger differs from the known types of plate heat exchangers in that it is formed by conventional rolled, thin-walled trapezoidal sheets that are placed against one another in pairs and connected in a gas-safe manner at the edges.
  • the rolled profile sheets are usually produced in lengths of 6 to 12 m, and compared to tubes and other profile bars, they are inexpensive.
  • the construction described is characterized by adequate rigidity, which enables easy assembly and handling. Any major leaks can be eliminated by covering the respective holes.
  • the basic element of the heat exchanger is represented by a pair 1 of trapezoidal sheets which are put together in such a way that their webs 4 rest against one another, their lateral edges 8 being connected in a gas-safe manner by welding, soldering or in some other way.
  • trapezoidal sheet metal pairs 1 rectangular openings 7 are punched at both ends of the webs 4 , the edges of which are welded or soldered together on the circumference 9 in a gas-safe manner.
  • These basic elements are placed side by side in such a way that columns 6 are created. This creates the structure of the thermally conductive walls.
  • the gaps 6 between two pairs of sheet metal 1 are covered - by means of profiled facing strips 10 (see Fig. Fig. 3 ) on the front sides of the heat exchanger and by means of smooth strips on the side walls.
  • This facing can be welded on or clamped with screws.
  • the second medium to be cooled (hot flue gases) is fed from below into the mouths of the channels 5 formed in pairs of sheets 1 and discharged therefrom at the top.
  • the first medium air or smoke gases to be heated
  • the distribution channels 13 equipped supply manifold 11 determined.
  • the distribution channels 13 ensure that the first medium is distributed into the gaps 6 between the pairs of sheets 1 . They are pushed into the openings 7 during the assembly of the supply manifold 11 .
  • the same construction is located on the lower side of the heat exchanger to remove the heated first medium.
  • the distribution channels 13 do not require compression in the openings 7 , and so they can be produced and inserted with sufficient installation clearance.
  • the construction described differs from the known solutions of plate heat exchangers.
  • the individual panels made of trapezoidal sheet metal are of the same shape, which significantly simplifies production and assembly. It is not a problem to produce the inlet and outlet parts for the first medium with sufficient accuracy and reliably.
  • the proposed solution brings about an almost ideal countercurrent arrangement with a high efficiency of heat utilization. Trapezoidal sheets in various shapes and material thicknesses are always available, repeated production of uniform parts reduces production costs. These are significantly lower than with tubular heat exchangers.
  • the heat exchanger can be completely assembled in production and delivered to the construction site as a whole. Cleaning and control can be carried out through the cleaning openings.
  • This heat exchanger is particularly advantageous for those companies where temperature reduction or preheating is involved with a large volume of flue gases or air to be preheated.
  • Such a case is provided by the exchangers in particular the SCR denitrification method, where catalysts are used at 200 ° C to 300 ° C.
  • the flue gases must first be heated to the required temperature and then cooled down to the temperature suitable for the chimney or cooling tower. The low heat losses are then compensated for by steam heating or an additional burner.
  • the heat exchanger according to the invention can also be used for preheating the combustion air or for other technologies that mainly work with clean media, e.g. with cleaned flue gases without solid foreign matter; however, the temperature of the medium must remain above the dew point.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP20000005.7A 2019-04-24 2020-01-07 Plattenwärmeübertrager Active EP3730890B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CZ2019-252A CZ2019252A3 (cs) 2019-04-24 2019-04-24 Rekuperační deskový výměník tepla

Publications (2)

Publication Number Publication Date
EP3730890A1 EP3730890A1 (de) 2020-10-28
EP3730890B1 true EP3730890B1 (de) 2021-12-29

Family

ID=71104694

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000005.7A Active EP3730890B1 (de) 2019-04-24 2020-01-07 Plattenwärmeübertrager

Country Status (2)

Country Link
EP (1) EP3730890B1 (cs)
CZ (1) CZ2019252A3 (cs)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112964099B (zh) * 2021-02-02 2023-08-18 山东国辰实业集团热能装备有限公司 一种全焊板壳式换热器及其加工方法
CZ309357B6 (cs) * 2021-07-28 2022-09-28 Vysoká Škola Báňská - Technická Univerzita Ostrava Rekuperační výměník tepla

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1601216B2 (de) 1967-11-03 1971-06-16 Linde Ag, 6200 Wiesbaden Blechtafel fuer platten waermetauscher mit einem stapel solcher blechtafeln
DE2400734A1 (de) * 1974-01-08 1975-07-17 Lwk Luft Waerme Klimatechnik G Rekuperativer waermeaustauscher zur waermerueckgewinnung in lufttechnischen anlagen
DE4333904C2 (de) * 1993-09-27 1996-02-22 Eberhard Dipl Ing Paul Kanalwärmetauscher
JP3302869B2 (ja) * 1995-11-15 2002-07-15 株式会社荏原製作所 プレート式熱交換器及びその製造方法
CN102472596B (zh) * 2009-07-27 2014-05-28 韩国德尔福汽车系统公司 板式热交换器
JP5244845B2 (ja) * 2010-03-31 2013-07-24 株式会社ユタカ技研 熱交換器
EP2607830B1 (en) * 2011-12-19 2018-09-12 Senior Uk Limited High effectiveness gas to gas heat exchangers
DE102012006477A1 (de) * 2012-03-29 2013-10-02 Linde Aktiengesellschaft Plattenwärmetauscher mit mehreren Modulen verbunden mit Profilen
AT14471U1 (de) * 2014-03-06 2015-11-15 Lasco Heutechnik Gmbh Feuerungsanlage

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Publication number Publication date
CZ308367B6 (cs) 2020-06-24
EP3730890A1 (de) 2020-10-28
CZ2019252A3 (cs) 2020-06-24

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