EP1793189A2 - Chaudière de récupération - Google Patents

Chaudière de récupération Download PDF

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Publication number
EP1793189A2
EP1793189A2 EP06024178A EP06024178A EP1793189A2 EP 1793189 A2 EP1793189 A2 EP 1793189A2 EP 06024178 A EP06024178 A EP 06024178A EP 06024178 A EP06024178 A EP 06024178A EP 1793189 A2 EP1793189 A2 EP 1793189A2
Authority
EP
European Patent Office
Prior art keywords
plug
waste heat
heat boiler
outlet end
exhaust gas
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
EP06024178A
Other languages
German (de)
English (en)
Other versions
EP1793189B1 (fr
EP1793189A3 (fr
Inventor
Jiri Dr. Jekerle
Heinrich Dipl.-Ing. Ormann
Klaus Dipl.-Ing. Rothenpieler
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.)
Arvos GmbH
Original Assignee
Alstom Technology 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
Application filed by Alstom Technology AG filed Critical Alstom Technology AG
Publication of EP1793189A2 publication Critical patent/EP1793189A2/fr
Publication of EP1793189A3 publication Critical patent/EP1793189A3/fr
Application granted granted Critical
Publication of EP1793189B1 publication Critical patent/EP1793189B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F22B1/1838—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 the hot gas being under a high pressure, e.g. in chemical installations
    • 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
    • F22B35/001—Controlling by flue gas dampers
    • 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
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/06—Derivation channels, e.g. bypass

Definitions

  • the invention relates to a waste heat boiler, comprising within a cylindrical shell a plurality of heat transfer tubes and a centrally arranged bypass tube, each having an inlet end and an outlet end and comprising a control device to maintain the waste heat recovery gas outlet temperature in a certain temperature range.
  • the invention relates in particular to a waste heat boiler whose control device attaches to the outlet end of the bypass pipe in order to influence the waste heat boiler gas outlet temperature.
  • Waste heat boilers are required for numerous chemical and petrochemical processes, which are fed with different gaseous and / or liquid media on the tube and shell side (channel side).
  • the hot exhaust gas originating from a process is usually supplied to the heat transfer tubes, which are arranged as a tube bundle within the waste heat boiler shell, and to the bypass tube.
  • the hot exhaust gas releases its heat to the shell-side cooling medium, usually water, and is then discharged from the waste heat boiler in a cooled state.
  • the heat recovery boiler gas outlet temperature In order to keep the heat recovery boiler gas outlet temperature within a certain temperature range, it may be necessary to influence the outlet temperature by means of a controlled bypass.
  • control flap or regulating rotary flap or a regulating plug which are arranged at the outlet end of the bypass tube.
  • control devices are from the publications DE AS 28 46 455 respectively.
  • a control element arranged at the outlet end of the bypass pipe for example a control flap or a control plug, is exposed to a high thermal load.
  • the currently used control plugs have the disadvantage that exhaust gases that flow out of the open bypass pipe outlet end form a strong strand, so that the risk of Hotspots on the wall of the gas outlet chamber consists.
  • One or more of these hotspots cause thermal damage to the wall of the gas outlet chamber, which in turn leads to undesirably short maintenance intervals or to a shorter service life of the waste heat boiler.
  • the object of the present invention is to provide a control plug which on the one hand can withstand the high exhaust gas temperatures and on the other hand avoids the formation of hot strands on exit of the exhaust gas from the bypass pipe outlet end.
  • the above object is solved by the entirety of the features of claim 1.
  • the solution provides that the stopper can be cooled by a cooling medium and projects into the gas outlet in the direction of gas flow conically expanded outlet end of the bypass tube and the gas passage cross section within the located between the inner contour of the outlet end and outer contour of the plug gas passage region and regardless of the location of seen in the open state plug in the flow direction of the exhaust stream seen expanded uniformly or non-uniformly.
  • the plug is seen in the flow direction of the exhaust stream at its downstream end with respect to the plug center part radially projecting plug-plate plate designed for deflecting the exhaust gas flow in a largely radial direction.
  • the outer diameter Dt of the plug-plate plate is formed with at least 1.5 times the outer diameter Dk of the plug top plate.
  • the outer contour of the plug central part over its longitudinal extent at least partially a cylindrical portion.
  • the cylindrical region of the plug results in a fluidically most favorable cross-sectional widening in the gas passage region, which equals a high diffuser effect with a concomitant strong reduction of the gas velocity.
  • the outer contour of the plug central part over its longitudinal extent at least partially a conical region, wherein in a particularly advantageous manner, the conicity of this conical portion of the plug central part corresponds to the taper of the conical outlet end of the bypass tube.
  • the conicity of this conical portion of the plug central part corresponds to the taper of the conical outlet end of the bypass tube.
  • the diffuser effect and thus the reduction of the exhaust gas velocity can be further enhanced by the conicity of at least a portion of the conical plug central part deviates from the taper of the cone-shaped outlet end of the bypass tube, the conicity of this region compared to the taper of the Outlet end of the bypass pipe) seen diverging in the flow direction of the exhaust stream.
  • stopper shaft connected to the stopper can be cooled by means of a cooling medium and the cooling medium can be fed to the stopper via the stopper shaft.
  • the conical outlet end of the bypass tube is advantageously provided on its inside with a lining.
  • the bypass pipe has a larger inner diameter compared with the heat transfer tubes, in order, if appropriate, to be able to bypass a correspondingly high quantity of exhaust gas.
  • An advantageous embodiment of the invention provides that the cooling medium through the plug and / or the shaft leading guide of the outer wall of the plug and / or the stopper shaft is adjusted so that between the outer wall and guide a gap is formed through which the cooling medium is conductive.
  • FIG. 1 shows a waste heat boiler 1 shown schematically in longitudinal section.
  • the waste heat boiler 1 has an outer casing 2, which encloses a plurality of heat transfer tubes 3 and a centrally arranged bypass tube 4, wherein the tubes 3, 4 are enclosed at their inlet and outlet ends 5, 6 of tube end plates 28, so that within the shell second and the end plates 28 a cavity for the passage of a cooling medium 31 for cooling the hot exhaust gas stream 27 is formed.
  • the bypass tube 4, which preferably has a larger diameter than the heat transfer tubes 3, may be partially or completely thermally insulated over its length to allow hot exhaust gas 27 to flow through the waste heat boiler 1 via the bypass tube 4 without significant heat being released to the cooling medium 31.
  • the waste heat boiler 1 means 7 for introducing a cooling medium 31, preferably water, and means 9 for deriving the cooling medium 31, preferably water / steam.
  • the waste heat boiler 1 takes place between the guided through the heat transfer tubes 3 exhaust gas 27 and the introduced water or cooling medium 31 instead of an indirect heat exchange, wherein the hot exhaust 27 emits heat to the cooling medium 31.
  • the control device 11 comprises a drive 17 which is arranged outside of the waste heat boiler 1 and which axially displaces the plug 12 by means of the plug shaft 16 connected to the plug 12.
  • the passage of the plug stem 16 is sealed by the wall of the gas outlet chamber 30 with a bushing 18.
  • the stopper 12 can be adjusted at the outlet end 6 of the bypass tube 4 such that a desired temperature or a desired temperature range of the exhaust gas 27 is maintained or maintained at the outlet from the waste heat boiler 1.
  • control stopper 12 intervened and acted by reducing or increasing the exhaust gas flow rate through the bypass pipe 4 to the exhaust gas outlet temperature of the waste heat boiler 1. Due to the axial displacement of the plug 12 is also accompanied by a change in the gas velocity within the range outlet end 6 and plug 12.
  • the outlet end 6 of the bypass tube 4 is inventively designed to avoid the gas strands in the flow direction of the exhaust stream 27 seen conically widened.
  • the stopper 12 according to the invention by a cooling medium 32 is designed to cool and it projects into the cone-shaped extended outlet end 6 of the bypass tube 4, wherein the of the inner contour 19 of the bypass tube outlet end 6 and outer contour 20 of the plug 12 formed annular gas passage cross-section 22 extends uniformly or non-uniformly seen within the gas passage region 21 in the gas flow direction.
  • the extension of the annular gas passage cross-section 22 within the gas passage region 21 is given or available regardless of the position of the plug 12 in the open state.
  • the gas passage region 21, which has a gas passage cross-section 22 and extends in the axial direction relative to the bypass tube 4 and whose length Ld is determined by the position of the stopper 12 within the outlet end 6 of the bypass tube 4, is defined as the region 21 in which axial direction or seen in the gas flow direction, the inner contour 19 of the bypass tube outlet end 6 and the outer contour 20 of the plug 12 according to the figures 2 to 5 overlap or overlap.
  • the stopper 12 is arranged in a compulsory manner coaxial with the bypass tube 4 or its outlet end 6.
  • the conical outlet end 6 of the bypass tube 4, as shown in Figures 2 to 5, may be formed at its inner diameter with a lining 26 to protect the bypass tube outlet end 6 from heat-related corrosion and erosion.
  • the edge of the head plate 13 of the plug 12 touches the cone of the bypass tube 4 or its outlet end 6 and the stopper 12 closes completely the gas passage cross-section 22 of the bypass tube 4 or its outlet end 6.
  • a gas passage cross section is formed between the edge of the head plate 13 and the outer contour 20 of the plug 12 and the conical inner contour 19 of the outlet end 6 of the bypass tube 4 22, through which the hot exhaust gas flows out at a high speed.
  • the outer contour 20 of the plug 12 has a conical region 24 in the plug center part 14, which corresponds to the conicity of the cone-shaped outlet end 6 of the bypass tube 4.
  • FIG. 4 shows a further variant of a plug 12 designed according to the invention, the plug center part 14 of which is conical.
  • the conical portion 24 of the upstream plug center portion 14 corresponds to the cone of the bypass tube outlet end 6 and the conical portion 25 of the downstream plug center portion 14 deviates from the cone of the bypass tube outlet end 6, with the conicity of the portion 25 opposite the taper of the outlet end 6 of the bypass tube 4 seen in the gas flow direction is divergent.
  • the gas passage cross-section 22 is expanded non-uniformly within the gas passage region 21, since the cross-section 22 widens more in the conical region 25 than in the conical region 24 and thus the diffuser effect is enhanced in the conical region 25 and the exhaust gas velocity within the gas passage region 21 even more relaxed can be.
  • the conical region 25 of the plug central part 23 can be arranged upstream of the conical region 24 of the plug central part 23.
  • the gas passage cross sections 22 within the gas passage regions 21 according to FIGS. 2, 3 and 5 have uniform extensions.
  • FIG. 2 A further variant of a stopper 12 designed according to the invention is shown in FIG. 2, in which the stopper central part 14 has a cylindrical region 23.
  • This variant is characterized by a high diffuser effect within the gas passage region 21, since the gas velocity can be greatly reduced because of the gas passage cross-section 22, which increases greatly in the gas flow direction.
  • the plug-plate plate 15 has according to Figures 2, 3 and 4 an outer diameter Dt, which preferably at least 1.5 times the outer diameter Dk of the plug top plate 13 corresponds.
  • the stopper shaft 16 connected to the stopper 12 is preferably also cooled by a cooling medium or fluid 32, generally water, whereby the cooling medium 32 supplied to the stopper 12 is first passed through the shaft 16 and flows through the plug 12 is again discharged through the shaft 16 according to the arrows indicated in Figure 2.
  • a cooling medium or fluid 32 generally water
  • the cooling medium 32 for example, as shown in Figure 2 centric, i. within the guide 33, fed, deflected within the plug 12 and then be discharged in a formed by the guide 33 and the outer wall of the shaft 16 concentric annular cross section over the shaft 16 again.
  • FIG. 3 shows a one-way cooling of plug 12 and stopper shaft 16 by means of a cooling medium 32, one way being that the cooling medium 32 is supplied to plug 12 within shaft 16, but is no longer removed via shaft 16.
  • the discharge takes place through the outlet of the cooling medium 32, for example, at an opening 34 of the top plate 13 of the plug 12, wherein the cooling medium 32 is thereby introduced into the flowing past the exhaust gas stream 27.
  • the guide means 33 guiding the cooling medium 32 through the plug 12 and the shaft 16 may be adapted to the outer contour 20 of the plug 12 or the outer wall of the shaft 16 so that a gap is created between the outer wall and the guide 33, through which the cooling medium 32, in FIG usually water, can flow.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Valves (AREA)
  • Lift Valve (AREA)
EP06024178.3A 2005-12-01 2006-11-22 Chaudière de récupération Not-in-force EP1793189B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005057674A DE102005057674B4 (de) 2005-12-01 2005-12-01 Abhitzekessel

Publications (3)

Publication Number Publication Date
EP1793189A2 true EP1793189A2 (fr) 2007-06-06
EP1793189A3 EP1793189A3 (fr) 2013-04-17
EP1793189B1 EP1793189B1 (fr) 2015-02-25

Family

ID=37814306

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06024178.3A Not-in-force EP1793189B1 (fr) 2005-12-01 2006-11-22 Chaudière de récupération

Country Status (6)

Country Link
US (1) US7412945B2 (fr)
EP (1) EP1793189B1 (fr)
JP (1) JP4591839B2 (fr)
CN (1) CN100451528C (fr)
DE (1) DE102005057674B4 (fr)
DK (1) DK1793189T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2312252A1 (fr) * 2009-10-07 2011-04-20 Lurgi GmbH Caisson de refroidissement et procédé de refroidissement de gaz de synthèse

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Publication number Priority date Publication date Assignee Title
EP1671020B1 (fr) * 2003-10-02 2010-04-14 Behr GmbH & Co. KG Echangeur air / air du moteur turbo d'un vehicule
DE102006052526A1 (de) * 2006-11-06 2008-05-08 Behr Gmbh & Co. Kg Wärmetauscher, insbesondere für ein Kraftfahrzeug
DE102006055973A1 (de) * 2006-11-24 2008-05-29 Borsig Gmbh Wärmetauscher zur Kühlung von Spaltgas
FR2923859B1 (fr) * 2007-11-15 2009-12-18 Valeo Systemes Thermiques Branche Thermique Habitacle Echangeur de chaleur pour circuit d'alimentation en air d'un moteur de vehicule automobile
DE102008051268A1 (de) * 2008-10-10 2010-04-15 Mahle International Gmbh Kühleinrichtung
DE102009048592A1 (de) 2009-10-07 2011-04-14 Lurgi Gmbh Abhitzekessel und Verfahren zur Abkühlung von Synthesegas
WO2011071393A1 (fr) * 2009-12-09 2011-06-16 Energy Saving Concepts Limited Appareil d'échange de chaleur et système de chauffage de fluide
JP2013517365A (ja) * 2010-01-21 2013-05-16 シエル・インターナシヨネイル・リサーチ・マーチヤツピイ・ベー・ウイ 熱交換器および熱交換器を操作する方法
JP2013092260A (ja) * 2010-01-26 2013-05-16 Mitsubishi Heavy Ind Ltd 廃熱ボイラ
CN101943529A (zh) * 2010-09-29 2011-01-12 西安航天华威化工生物工程有限公司 高温气体干法降温装置及方法
KR20140005865A (ko) * 2010-09-30 2014-01-15 할도르 토프쉐 에이/에스 폐열 보일러
PL2482020T5 (pl) 2011-01-31 2023-03-27 Haldor Topsøe A/S Wymiennik ciepła
DE102012007721B4 (de) 2012-04-19 2022-02-24 Thyssenkrupp Industrial Solutions Ag Prozessgaskühler mit hebelgesteuerten Prozessgaskühlerklappen
PL2852804T3 (pl) * 2012-05-09 2016-06-30 Haldor Topsoe As Kocioł na ciepło odpadowe z obejściem i mieszalnikiem
EP2944913B1 (fr) * 2014-05-16 2018-09-05 Borgwarner Emissions Systems Spain, S.L.U. Dispositif d'échange de chaleur
US10782073B2 (en) * 2015-02-27 2020-09-22 Technip France Waste heat boiler system, mixing chamber, and method for cooling a process gas
DE102015013517A1 (de) * 2015-10-20 2017-04-20 Borsig Gmbh Wärmeübertrager
EP3407001A1 (fr) 2017-05-26 2018-11-28 ALFA LAVAL OLMI S.p.A. Équipement à faisceau tubulaire muni d'une dérivation
CN107956900B (zh) * 2017-11-15 2023-07-14 北京航化节能环保技术有限公司 一种余热锅炉工艺气调节阀
KR101828427B1 (ko) * 2017-11-22 2018-03-29 주식회사 보야 파우더 프로텍팅 3웨이 밸브
GB2601773B (en) * 2020-12-09 2023-03-29 Helical Energy Ltd A heat exchange unit

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GB727585A (en) * 1952-03-27 1955-04-06 Nat Res Dev Improvements in or relating to leak valves
GB1303092A (fr) * 1970-08-29 1973-01-17
DE2846455B1 (de) * 1978-10-23 1979-10-31 Borsig Gmbh Rohrbuendel-Waermetauscher mit gleichbleibender Austrittstemperatur eines der beiden Medien
EP0357907A1 (fr) * 1988-09-06 1990-03-14 Balcke-Dürr AG Echangeur de chaleur

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Publication number Priority date Publication date Assignee Title
US1918966A (en) * 1930-06-20 1933-07-18 Gen Chemical Corp Apparatus for treating gas
GB727585A (en) * 1952-03-27 1955-04-06 Nat Res Dev Improvements in or relating to leak valves
GB1303092A (fr) * 1970-08-29 1973-01-17
DE2846455B1 (de) * 1978-10-23 1979-10-31 Borsig Gmbh Rohrbuendel-Waermetauscher mit gleichbleibender Austrittstemperatur eines der beiden Medien
EP0357907A1 (fr) * 1988-09-06 1990-03-14 Balcke-Dürr AG Echangeur de chaleur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2312252A1 (fr) * 2009-10-07 2011-04-20 Lurgi GmbH Caisson de refroidissement et procédé de refroidissement de gaz de synthèse

Also Published As

Publication number Publication date
US20070125317A1 (en) 2007-06-07
JP4591839B2 (ja) 2010-12-01
DE102005057674A1 (de) 2007-06-06
EP1793189B1 (fr) 2015-02-25
JP2007155328A (ja) 2007-06-21
DE102005057674B4 (de) 2008-05-08
CN100451528C (zh) 2009-01-14
CN1982802A (zh) 2007-06-20
US7412945B2 (en) 2008-08-19
DK1793189T3 (en) 2015-04-20
EP1793189A3 (fr) 2013-04-17

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