EP2820367A1 - Échangeur de chaleur rotatif doté de plaques ou de tuyaux en matériau de carbone et de graphite - Google Patents

Échangeur de chaleur rotatif doté de plaques ou de tuyaux en matériau de carbone et de graphite

Info

Publication number
EP2820367A1
EP2820367A1 EP13702995.5A EP13702995A EP2820367A1 EP 2820367 A1 EP2820367 A1 EP 2820367A1 EP 13702995 A EP13702995 A EP 13702995A EP 2820367 A1 EP2820367 A1 EP 2820367A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
rotary
plates
gas
rotary heat
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.)
Withdrawn
Application number
EP13702995.5A
Other languages
German (de)
English (en)
Inventor
Lotfi Chouba
Thomas GRÜNBERGER
Marcus Franz
Adam Schulz
Josef Paula
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 Carbon SE
Original Assignee
SGL Carbon SE
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 SGL Carbon SE filed Critical SGL Carbon SE
Publication of EP2820367A1 publication Critical patent/EP2820367A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
    • F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
    • F28D19/041—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier with axial flow through the intermediate heat-transfer medium
    • F28D19/042—Rotors; Assemblies of heat absorbing masses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/02—Constructions of heat-exchange apparatus characterised by the selection of particular materials of carbon, e.g. graphite

Definitions

  • the invention relates to a rotary heat exchanger for the recovery of heat from the exhaust air according to the preamble of the main claim.
  • Such rotary heat exchangers transfer the heat from a warm raw gas stream to a colder clean gas stream using a suitable storage mass.
  • a plurality of heating elements form the storage mass of a regenerative heat exchanger.
  • the heat exchanger plates or heat exchanger tubes representing the storage mass are arranged in such a way that they form a rotor (1). The heat is removed from the warm gas stream and released to the colder one.
  • the heat exchanger plates or heat exchanger tubes may consist of metallic materials, mostly of carbonaceous steels.
  • metallic materials mostly of carbonaceous steels.
  • it is customary to provide them with an enamel layer.
  • the aging of enamel panels is based on the material combination of steel and enamel, which are unsuitable for frequent load changes due to the different thermal expansion coefficients. Due to this unavoidable aging and concomitant porosity of the enamel layer, the underlying steel sheet is subject to severe corrosion.
  • the protection of existing metallic material heat exchanger plates or heat exchanger tubes is given only conditionally and therefore their regular renewal required.
  • Such heat exchanger plates or heat exchanger tubes have experience to be completely replaced after an operating time of about four years.
  • the storage mass required for regenerative heat transfer is subjected to further operational stresses when used in dusty gas streams.
  • This applies for example, to the storage mass of air preheaters on boiler systems or gas preheaters on flue gas cleaning systems, where the temperatures of the storage mass at least locally and / or temporarily below the Rauchgastauliens and in conjunction with flue dust and / or other smoke ingredients (additives, means for flue gas cleaning) Make deposits on the storage mass or the heating surfaces of the heating elements. The latter increase the pressure loss for the flow through the storage mass and lead in the worst case to complete obstruction / blockage of the regenerative heat exchanger.
  • Regenerative heat exchangers consist of a multiplicity of heating elements or heat accumulators which are heated by a hot gas, for example flue gas, and which subsequently release the stored heat to a colder fluid, for example air or gas.
  • a hot gas for example flue gas
  • a colder fluid for example air or gas.
  • Such regenerative heat exchangers can be used, for example, as air preheaters or gas preheaters in boiler systems and flue gas purification systems.
  • Air preheaters are designed according to the prior art so that the cold end temperature is above the so-called pollution temperature.
  • the soiling temperature is the temperature at which deposits can no longer be controlled with economically justifiable expense as a consequence of dew point discrimination and the inclusion of flue dust (ash) in the smoke condensate (sulfuric acid and / or sulfurous acid and / or other acids).
  • DE 4 337 895 discloses the use of heat exchanger plates made of carbon fibers reinforced polyarylketone or polybenzimidazole.
  • Plastic storage masses are expensive and disadvantageous because they have a low heat capacity and heat conduction.
  • WO 2001/045825 again discloses a method and an associated heat exchange device for treating a gas, wherein the application is designed especially for the energy production and for the removal of CO2 from exhaust gas or combustion gas.
  • US 2001/0047862 A1 discloses special plate heat exchangers for use as gas / gas or gas / liquid heat exchangers whose fins and plates are generally made of carbon.
  • the lowest possible flue gas outlet temperature (temperature of the flue gas after flowing through the regenerative heat exchanger) and thus also the lowest possible cold end temperature of the regenerative heat exchanger is aimed at with air preheaters.
  • limits have hitherto been set for the depth of the cold end temperature because of too rapid formation of deposits and poor cleanability.
  • the exhaust gas temperature in the air preheater should be lowered as far as possible, which is only possible with the help of corrosion-resistant and dirt-repellent heating surfaces.
  • this task is not limited to corrosive flue gases from coal combustion plants, but extends mutatis mutandis to other corrosive gases regenerative heat exchanger, as they occur for example in steel mills.
  • a rotary heat exchanger with a storage mass consisting of in a rotor (1) arranged heat exchanger plates or heat exchanger tubes, which absorb the heat from a warm gas stream and deliver to a colder gas stream, which is characterized in that the heat exchanger plates or the heat exchanger tubes consist of carbon composite materials and / or of graphite and / or of hard carbon.
  • the rotary heat exchanger according to the invention consists of graphite or hard coal or graphite and hard coal.
  • the heat exchanger plates or the heat exchanger tubes of the rotary heat exchanger according to the invention can also be coated.
  • a particularly preferred coating on the otherwise rather rough surfaces of the heating elements extremely liable is to raise.
  • Very thin layers are sufficient, preferably 20 to 200 ⁇ m.
  • a preferred coating matehal is the class of PFA (perfluoroalkoxy polymers).
  • PTFE polytetrafluoroethylene
  • FEP polytetrafluoroethylene-perfluoroethylene copolymer
  • ETFE ethylene-tetrafluoroethylene copolymer
  • the new material combination now fulfills the required properties according to the invention: anti-adhesion properties and maximum corrosion resistance, that is to say the permeability known for plastics no longer plays a role because of the use of the carbon substrate, since carbon is inherently stable.
  • a deposit formation is either prevented even at extreme dew point undershoot or at least it is much better controllable, which ultimately allows a lowering of the flue gas temperature below the usual level.
  • a lower flue gas temperature means a higher boiler efficiency and thus a lower specific CO2 emission (emitted amount of CO2 per unit produced electrical energy) and the downstream of the air preheater plants (electrostatic precipitator, flue gas cleaning system) can be built smaller (lower investment, lower operating costs).
  • Another advantage is that the dew point below (sulfuric acid expansions) is accompanied by a reduction of SO3 / H 2 SO 4 concentration in the flue gas and thus the risk of corrosion in downstream systems and the risk of aerosol formation is reduced.
  • the carbon materials used according to the invention and / or carbon composite materials eg carbon thermoplastics or carbon resin compounds
  • / or the materials graphite and / or hard carbon have a high temperature resistance and a resistance to aggressive media. Due to the low surface energy of these materials, no or only very few dust particles settle on the surface of such heat exchanger plates or heat exchanger tubes, so that the rinsing processes with hot water necessary for generic heat exchangers have to be carried out much less frequently to remove the added residues.
  • the rinsing process can also be carried out much more frequently, since the materials according to the invention or plates or tubes, which are used here as storage nests, also withstand frequent temperature changes in practice without damage, since, for example, spalling of enamel layers or others Protective layers is not to be feared.
  • the material according to the invention is much lighter than the generic rotary heat exchanger, whereby smaller drives are required for the heat exchanger and from which a lower energy consumption results.
  • the conductivity of the materials used according to the invention is higher than the thermal conductivity of the conventional materials for the same area.
  • Such rotary heat exchangers are thus more resilient, i. It is possible a higher throughput of the respective exchange medium.
  • Another aspect of the present invention relates to the use of the rotary heat exchanger according to the invention.
  • the rotary heat exchanger according to the invention is used because of its material for the recovery of heat from the exhaust air of power plants, in particular of flue gas desulphurisation plants
  • the rotary heat exchanger according to the invention is therefore not limited solely to the gas / gas heat exchange due to its material nature in its use.
  • the rotary heat exchanger according to the invention is advantageously produced in the plug-in method and connected in a form-fitting or frictionally engaged manner, it also being possible to use, for example, clamping methods.
  • the individual heat exchanger plates or heat exchanger tubes are combined with each other to plate packs (2) or tube packages, from which the rotor (1) is constructed.
  • the profiling of the plates which is necessary for some fields of application, can be carried out by customary shaping processes which are suitable for carbon products, for example near net shape by extrusion.
  • the adaptation of the panel profile to the given heat exchanger can be done "on site".
  • the life of a memory element according to the invention is up to 10 years due to the described properties of the materials used.
  • the heat exchanger plates are subjected to a rinsing process every 0.5 to 8 hours.
  • the materials according to the invention can preferably be produced in a per se known extrusion process. Very economical press-to-size processes with binder / carbon mixtures or polymer / carbon compounds or graphite compounds are also preferred.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Supply (AREA)

Abstract

L'invention concerne un échangeur de chaleur rotatif pour la récupération de chaleur à l'aide d'une masse d'accumulation. L'échangeur de chaleur rotatif est constitué de plaques ou de tuyaux d'échange de chaleur disposés en tant que rotor (1), lesquels reçoivent la chaleur d'un flux gazeux chaud et la cèdent à un flux gazeux froid, les plaques ou tuyaux d'échange de chaleur étant constitués de matériaux composites de carbone et/ou de graphite et/ou de charbon de cuisson dure.
EP13702995.5A 2012-03-01 2013-01-31 Échangeur de chaleur rotatif doté de plaques ou de tuyaux en matériau de carbone et de graphite Withdrawn EP2820367A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012203278A DE102012203278A1 (de) 2012-03-01 2012-03-01 Rotationswärmetauscher mit Wärmetauscherplatten oder Wärmetauscherrohren aus Kohle- und Graphitwerkstoffen
PCT/EP2013/051974 WO2013127594A1 (fr) 2012-03-01 2013-01-31 Échangeur de chaleur rotatif doté de plaques ou de tuyaux en matériau de carbone et de graphite

Publications (1)

Publication Number Publication Date
EP2820367A1 true EP2820367A1 (fr) 2015-01-07

Family

ID=47678764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13702995.5A Withdrawn EP2820367A1 (fr) 2012-03-01 2013-01-31 Échangeur de chaleur rotatif doté de plaques ou de tuyaux en matériau de carbone et de graphite

Country Status (4)

Country Link
EP (1) EP2820367A1 (fr)
CN (1) CN104204712A (fr)
DE (1) DE102012203278A1 (fr)
WO (1) WO2013127594A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015107476A1 (de) 2015-05-12 2016-11-17 Elringklinger Ag Wärmetauscherelemente, insbesondere für Rauchgasreinigungsanlagen von Kraftwerken
JP6772589B2 (ja) * 2016-06-29 2020-10-21 中国電力株式会社 付着物判定装置、付着物判定方法
CN114110644B (zh) * 2021-11-25 2022-08-02 淄博金通电力科技有限公司 一种受热面回转式空气预热器及其密封组件与制备方法
DE102022003647A1 (de) 2022-10-04 2024-04-04 Thomas Brandmeier Verfahren zum Betreib einer Rotationswärmetauschereinrichtung und Rotor-Speichermasse

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB685777A (en) * 1950-03-17 1953-01-14 Howden James & Co Ltd Improvements in or relating to heat exchangers
US3058723A (en) * 1955-03-14 1962-10-16 Svenska Rotor Maskiner Ab Regenerative heat exchangers
DE1117148B (de) * 1958-01-04 1961-11-16 Gea Luftkuehler Happel Gmbh Waermeaustauscher, insbesondere fuer fluessige Medien, die nicht miteinander in Beruehrung kommen duerfen
DE8417094U1 (de) * 1984-06-05 1984-08-30 Sigri Elektrographit Gmbh, 8901 Meitingen Speicherkoerper fuer regenerator
DE4319481C1 (de) * 1993-06-11 1994-09-08 Gea Luftkuehler Happel Gmbh Verbindung von aus Fluorkunststoff bestehenden Wärmetauscherrohren eines Wärmetauschers mit einem Rohrboden
DE4337895C2 (de) 1993-11-05 1996-09-05 Leto Gmbh Rotationswärmetauscher zur Rückgewinnung von Wärme aus der Abluft von insbesondere Rauchgasentschwefelungsanlagen
US20010047862A1 (en) * 1995-04-13 2001-12-06 Anderson Alexander F. Carbon/carbon heat exchanger and manufacturing method
US6093504A (en) * 1996-12-03 2000-07-25 Bliesner; Wayne Thomas Electro-chemical-thermal rechargeable energy storage cell (ECT cell)
DE19940627A1 (de) 1999-08-27 2001-03-01 Abb Patent Gmbh Heizelement für einen Regenerativ-Wärmetauscher und Verfahren zum Herstellen eines Heizelementes
NO316194B1 (no) 1999-12-22 2003-12-22 Norsk Hydro As Anordning og fremgangsmate for behandling av en forbrenningsgasstrom
DE10320462B3 (de) 2003-05-08 2005-03-03 Alstom Power Energy Recovery Gmbh Heizelement für einen Regenerativ-Wärmetauscher und Verfahren zum Herstellen eines Heizelementes
CN201593936U (zh) * 2010-01-26 2010-09-29 宁波市北仑银海机械制造有限公司 一种聚四氟乙烯浸渍石墨换热器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013127594A1 *

Also Published As

Publication number Publication date
DE102012203278A1 (de) 2013-09-05
WO2013127594A1 (fr) 2013-09-06
CN104204712A (zh) 2014-12-10

Similar Documents

Publication Publication Date Title
CA1168593A (fr) Methode et dispositif de traitement des gaz d'echappement
EP1703244A1 (fr) Bloc échangeur de chaleur pour gaz effluents contenant de la poussière
EP2820367A1 (fr) Échangeur de chaleur rotatif doté de plaques ou de tuyaux en matériau de carbone et de graphite
DE112014003577B4 (de) Konvektionswärmeübergangsabzug
DE69311976T2 (de) Vorrichtungen zur Abscheidung von Schlacke aus Rauchgasen der Kohlenstaubverbrennung
DE102007011640A1 (de) Anlage zur Rüchgewinnung von Wärmeenergie und Reinigung von Rauchgasen aus feuerungstechnischen Anlagen
DE3335917A1 (de) Vorrichtung nach art eines luftvorwaermers zur vorwaermung der verbrennungsluft fuer einen verbrennungsprozess mit gleichzeitiger verminderung des in den rauchgasen enthaltenen no(pfeil abwaerts)x(pfeil abwaerts)"
EP1475597B1 (fr) Elément de chauffage pour échangeur de chaleur régénératif et son procédé de fabrication
WO1996023169A1 (fr) Procede et dispositif pour la commande de souffleurs de suie dans une chaufferie
DE3911276C1 (en) Device for recovering (reclaiming) heat from the exhaust gases of firing units (installations, systems)
EP0162269B1 (fr) Procédé et dispositif pour le réchauffage des gaz de foyer
DE202009015181U1 (de) Kontaktflächen aus Rohrprallkörpern für die Verbesserung der SO2 Abscheidung in Rauchgasentschwefelungen
DE4309844C2 (de) Verfahren zur Herstellung eines Rohrbündel-Wärmetauschers für Rauchgase
EP1208344A1 (fr) Element chauffant pour echangeur de chaleur a recuperation et procede de production d'un element chauffant
EP0102359B2 (fr) Dispositif accumulateur pour transfert thermique
CN209302361U (zh) 气固分离界面上的清扫装置
DE3043804A1 (de) Verfahren und vorrichtung zur waermerueckgewinnung aus heissen ofengasen, insbesondere glasofengasen
WO2016046257A1 (fr) Bloc en nid d'abeilles et éléments échangeurs de chaleur fabriqués à partir de celui-ci, notamment pour épurateurs de gaz de fumée de centrales électriques
DE3207213C3 (de) Speicherblock aus Kunststoff für Wärmeübertragung zwischen Gasströmen in Wärmetauschern
DE2232258C3 (de) Verfahren zur Behandlung von schädliche Bestandteile enthaltenden Abgasen aus Industrieanlagen
DE102019212314A1 (de) Vorrichtung und Verfahren zum Kühlen und/oder Reinigen eines aus einem Konverter austretenden Prozessgases
DE4337895C2 (de) Rotationswärmetauscher zur Rückgewinnung von Wärme aus der Abluft von insbesondere Rauchgasentschwefelungsanlagen
EP3736520B1 (fr) Vis d'enregistrement pour une conduite de fumée pourvu d'éléments de brosse
DE102012112645B4 (de) Kesselanlage und Verfahren zur Erwärmung eines Wärmeübertragungsfluides
WO2007085490A1 (fr) Dispositif et procédé destinés à séparer des polluants dans un gaz de fumée d'une installation thermique

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20141001

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20160802