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WO2002003005A1 - Procede de mise en oeuvre d'echangeur thermique rotatif a regeneration - Google Patents

Procede de mise en oeuvre d'echangeur thermique rotatif a regeneration Download PDF

Info

Publication number
WO2002003005A1
WO2002003005A1 PCT/JP2001/005721 JP0105721W WO0203005A1 WO 2002003005 A1 WO2002003005 A1 WO 2002003005A1 JP 0105721 W JP0105721 W JP 0105721W WO 0203005 A1 WO0203005 A1 WO 0203005A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
heat exchanger
regenerative heat
temperature
furnace
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.)
Ceased
Application number
PCT/JP2001/005721
Other languages
English (en)
Japanese (ja)
Inventor
Kazuhiko Fukutani
Toshihiro Ohkohchi
Shuichi Tsuboi
Tomoharu Miyamoto
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.)
Nippon Steel Corp
Alstom NV
Original Assignee
Nippon Steel Corp
Alstom Power NV
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 Nippon Steel Corp, Alstom Power NV filed Critical Nippon Steel Corp
Priority to AU2001267903A priority Critical patent/AU2001267903A1/en
Publication of WO2002003005A1 publication Critical patent/WO2002003005A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F23L15/02—Arrangements of regenerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/10—Arrangements for using waste heat
    • F27D17/12—Arrangements for using waste heat using heat storage
    • F27D17/13—Arrangements for using waste heat using heat storage using regenerative heat exchangers
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

Definitions

  • the present invention relates to a method for operating a rotary regenerative heat exchanger installed in a furnace such as a billet heating furnace, a billet heat treatment furnace, and an ingot soaking furnace.
  • a rotary regenerative heat exchanger has been used to recover the retained heat of the high-temperature exhaust gas discharged from furnaces such as a billet heating furnace and a heat treatment furnace.
  • this rotary regenerative heat exchanger as shown in Fig. 1, the inside of the housing 1 is divided by a sector plate 2, and the exhaust gas flows on one side and the combustion air flows on the other side. Then, the rotor 3 is rotated to perform heat exchange.
  • a heat storage body made of corrugated steel sheet is provided in Row 3 to be heated on the exhaust gas side and rotate to the combustion gas side to preheat the combustion air.
  • Rotary regenerative heat exchangers have been used mainly for low-temperature exhaust gas of 400 ° C or less, but in recent years the usable temperature has increased to around 100 ° C.
  • the thermal expansion of the mouth 3 increases, and especially when the furnace temperature fluctuates greatly, such as when the furnace is heated, the thermal expansion of the housing 1 and the thermal expansion of the mouth 3 become unbalanced. As a result, excessive contact may occur at the rotating sliding part, and the rotation of the mouth 3 may stop.
  • the present invention has been made to solve the conventional problems described above and to provide an operation method of a rotary regenerative heat exchanger that can prevent excessive contact of a rotary sliding portion even when a furnace temperature fluctuates greatly. Things.
  • the present invention made to solve the above-mentioned problem is characterized in that a part of the exhaust gas that exits the rotary regenerative heat exchanger is provided on the exhaust gas inlet side of the rotary regenerative heat exchanger that recovers exhaust heat from the furnace exhaust gas.
  • a sharp change in the exhaust gas temperature at the exhaust gas inlet side during furnace temperature fluctuations is prevented.
  • Means for suppressing the amount of exhaust gas entering the regenerative heat exchanger may be used in combination. Then, it is preferable to control the exhaust gas temperature on the exhaust gas inlet side to 150 ° C./Hr or less.
  • a part of the exhaust gas that has exited the rotary regenerative heat exchanger when the furnace is heated or the like is returned to the exhaust gas inlet side of the rotary regenerative heat exchanger.
  • FIG. 1 is a cross-sectional view of a rotary regenerative heat exchanger.
  • FIG. 2 is a system diagram showing the first embodiment of the present invention.
  • FIG. 3 is a system diagram showing a second embodiment of the present invention.
  • FIG. 2 is a diagram showing a first embodiment of the present invention.
  • reference numeral 10 denotes a rotary regenerative heat exchanger shown in FIG. 1, which supplies high-temperature exhaust gas discharged from furnaces such as a billet heating furnace and a heat treatment furnace (not shown), and supplies a burner 11 to a parner. Heat is exchanged with the combustion air.
  • An exhaust gas suction pipe 13 is installed in the exhaust gas channel 12 on the outlet side of the regenerative heat exchanger 10. The exhaust gas that has passed through the regenerative heat exchanger 10 and has dropped in temperature is collected by the chimney 1 Sent to 4.
  • Reference numeral 15 denotes an exhaust gas circulation passage for extracting a part of the exhaust gas from between the exhaust gas suction blower 13 and the chimney 14.
  • the low-temperature exhaust gas extracted through the exhaust gas circulation channel 15 is returned to the exhaust gas channel 17 on the entry side of the rotary regenerative heat exchanger 10 via the dilution damper 16.
  • the opening and closing of the dilution damper 16 is controlled by a temperature control program 17.
  • the temperature control program 17 monitors the temperature of the exhaust gas on the inlet side of the regenerative heat exchanger 10 by using a temperature sensor 18 provided in the exhaust gas flow path 17 on the inlet side.
  • the rising gradient of the exhaust gas temperature may be set so as not to cause excessive contact of the rotary sliding portion of the regenerative heat exchanger 10 .
  • the exhaust gas temperature at the entrance of the regenerative heat exchanger 10 Is preferably suppressed to 150 ° C./Hr or less.
  • a fresh air suction damper 20 is newly provided in the exhaust gas passage 12 on the outlet side of the rotary regenerative heat exchanger 10.
  • the opening / closing of the outside air suction damper 20 is also controlled by the temperature control program 17 as in the first embodiment.
  • the outside air suction damper 20 is opened, the outside air is sucked by the draft in the chimney 14 and the amount of exhaust gas and exhaust gas heat flowing into the regenerative heat exchanger 10 is reduced by that amount. The effect of suppressing a rapid rise in the exhaust gas temperature on the inlet side of the exchanger 10 can be obtained.
  • the low-temperature exhaust gas shown in the first embodiment is passed through the dilution damper 16 to the exhaust gas passage 19 on the entry side of the rotary regenerative heat exchanger 10.
  • the exhaust gas temperature can be controlled more reliably by using both the means for returning to the temperature and the outside air suction means by the outside air suction damper 20.
  • the present invention was applied to a rotary regeneration heat exchanger installed in a billet heating furnace.
  • the slab heating furnace is heated from room temperature to the target heating temperature of the steel material, and the target heating temperature of the steel material also varies in the range of 900 to 130 ° C. Therefore, the temperature of the exhaust gas on the inlet side of the regenerative heat exchanger is also in the range of room temperature to 1000. It fluctuates in the range of about C o If the temperature of the exhaust gas on the inlet side of the rotary regenerative heat exchanger rises, the temperature rises to 200 ° C / Hr or more during the heating work, and over-contact of the sliding parts due to the rapid temperature rise may occur. In some cases, the rotary drive was overloaded and heat exchange was interrupted.
  • the present invention was applied to a rotary regenerative heat exchanger installed in a steel ingot soaking furnace in which a target heating temperature varies in a range of 900 to 140 ° C.
  • the exhaust gas temperature on the inlet side of this rotary regeneration type heat exchanger fluctuates in the range from normal temperature to 1200 ° C. Fluctuations in the exhaust gas temperature on the inlet side of the regenerative heat exchanger are more than 300 ° C / Hr when temperature control is not performed.
  • the drive was overloaded and heat exchange was interrupted.
  • the low-temperature exhaust gas after passing through the rotary regeneration heat exchanger is returned to the exhaust gas channel 19 on the entry side of the rotary regeneration heat exchanger 10 via the dilution damper 16.
  • the fluctuations in the exhaust gas temperature on the inlet side of the regenerative heat exchanger were reduced to 150 ° C / Hr or less by this method. could be done.
  • a part of the low-temperature exhaust gas exiting the rotary regenerative heat exchanger is provided on the exhaust gas inlet side of the rotary regenerative heat exchanger that recovers exhaust heat from the exhaust gas of the furnace.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Supply (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

La présente invention concerne un procédé de mise en oeuvre d'un échangeur thermique rotatif à régénération capable d'empêcher le contact excessif d'une partie coulissant par rotation, même en cas de variation importante de la température du four. A cet effet, on commence par disposer un évaporateur d'eau (16) pour restituer une partie des gaz de combustion de faible température de l'échangeur thermique rotatif à régénération (10) à l'entrée des gaz de combustion de l'échangeur thermique rotatif à régénération (10) récupérant une chaleur de combustion des gaz de cmobustion d'un four (four de chauffage de billettes, four de traitement thermique de billettes, four pit à lingots), puis on ouvre l'évaporateur d'eau (16) en cas de variation de la température du four, ce qui évite les variations brutales de la température des gaz de combustion à l'entrée. En outre, un vaporisateur d'eau à dépression (20) traitant l'air extérieur à la sortie des gaz de combustion peut être utilisé conjointement avec l'évaporateur d'eau. On vise ainsi à éliminer les températures des gaz de combustion supérieures à 150°/h ou en dessous.
PCT/JP2001/005721 2000-06-30 2001-07-02 Procede de mise en oeuvre d'echangeur thermique rotatif a regeneration Ceased WO2002003005A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001267903A AU2001267903A1 (en) 2000-06-30 2001-07-02 Method of operating rotating regenerative heat exchanger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000197708A JP3649999B2 (ja) 2000-06-30 2000-06-30 回転再生式熱交換器の運転方法
JP2000-197708 2000-06-30

Publications (1)

Publication Number Publication Date
WO2002003005A1 true WO2002003005A1 (fr) 2002-01-10

Family

ID=18695995

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/005721 Ceased WO2002003005A1 (fr) 2000-06-30 2001-07-02 Procede de mise en oeuvre d'echangeur thermique rotatif a regeneration

Country Status (4)

Country Link
JP (1) JP3649999B2 (fr)
AU (1) AU2001267903A1 (fr)
TW (1) TW505702B (fr)
WO (1) WO2002003005A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2282795C1 (ru) * 2005-04-05 2006-08-27 Олег Савельевич Кочетов Кондиционер с вращающимся теплообменником
RU2282796C1 (ru) * 2005-04-05 2006-08-27 Олег Савельевич Кочетов Способ утилизации тепла нагретого воздуха и утилизатор тепла
CN103201579A (zh) * 2010-10-07 2013-07-10 宇部兴产株式会社 加热炉的热效率改善方法及加热炉的热效率改善装置
CN104100993A (zh) * 2014-06-19 2014-10-15 钟小葵 一种往复式空气预热器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5432466B2 (ja) * 2008-03-31 2014-03-05 大阪瓦斯株式会社 燃焼装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0239228Y2 (fr) * 1986-04-02 1990-10-22
US6007761A (en) * 1997-01-31 1999-12-28 Kawasaki Steel Corporation Heat treating furnace for a continously supplied metal strip

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0239228Y2 (fr) * 1986-04-02 1990-10-22
US6007761A (en) * 1997-01-31 1999-12-28 Kawasaki Steel Corporation Heat treating furnace for a continously supplied metal strip

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2282795C1 (ru) * 2005-04-05 2006-08-27 Олег Савельевич Кочетов Кондиционер с вращающимся теплообменником
RU2282796C1 (ru) * 2005-04-05 2006-08-27 Олег Савельевич Кочетов Способ утилизации тепла нагретого воздуха и утилизатор тепла
CN103201579A (zh) * 2010-10-07 2013-07-10 宇部兴产株式会社 加热炉的热效率改善方法及加热炉的热效率改善装置
CN103201579B (zh) * 2010-10-07 2015-04-15 宇部兴产株式会社 加热炉的热效率改善方法及加热炉的热效率改善装置
CN104100993A (zh) * 2014-06-19 2014-10-15 钟小葵 一种往复式空气预热器
CN104100993B (zh) * 2014-06-19 2016-02-10 钟小葵 一种往复式空气预热器

Also Published As

Publication number Publication date
TW505702B (en) 2002-10-11
AU2001267903A1 (en) 2002-01-14
JP2002013891A (ja) 2002-01-18
JP3649999B2 (ja) 2005-05-18

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