US20130160968A1 - Rotary regenerative heat exchanger - Google Patents

Rotary regenerative heat exchanger Download PDF

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Publication number
US20130160968A1
US20130160968A1 US13/708,954 US201213708954A US2013160968A1 US 20130160968 A1 US20130160968 A1 US 20130160968A1 US 201213708954 A US201213708954 A US 201213708954A US 2013160968 A1 US2013160968 A1 US 2013160968A1
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US
United States
Prior art keywords
sector plate
heat exchanger
storage body
heat storage
rotary regenerative
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.)
Abandoned
Application number
US13/708,954
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English (en)
Inventor
Shirosuke SUZUKI
Masahiko Maruyama
Kengo MITSUFUJI
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.)
ALSTOM ENERGY TECHNOLOGY AG
Arvos Ljungstroem LLC
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
Assigned to ALSTOM TECHNOLOGY LTD reassignment ALSTOM TECHNOLOGY LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MARUYAMA, MASAHIKO, MITSUFUJI, KENGO, SUZUKI, DAISUKE
Publication of US20130160968A1 publication Critical patent/US20130160968A1/en
Assigned to ALSTOM ENERGY TECHNOLOGY AG reassignment ALSTOM ENERGY TECHNOLOGY AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALSTOM TECHNOLOGY LTD
Assigned to ARVOS TECHNOLOGY LIMITED reassignment ARVOS TECHNOLOGY LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALSTOM TECHNOLOGIE AG
Assigned to ARVOS INC. reassignment ARVOS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ARVOS TECHNOLOGY LIMITED
Abandoned legal-status Critical Current

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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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • 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
    • 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
    • F28D19/047—Sealing means

Definitions

  • the present invention relates to a rotary regenerative heat exchanger.
  • a rotary regenerative heat exchanger which is generally installed as an air preheater in a power generation plant or the like conventionally has a structure in which a rotor 1 accommodating a heat storage body 1 a such as a heat transfer element is rotated inside a housing 2 , the heat storage body 1 a is heated by means of a high-temperature heating fluid G 1 such as exhaust gas and stores the heat, and low-temperature fluid to be heated G 2 such as combustion air is heated by the heat stored in the heat storage body 1 a , as shown in FIG. 3 .
  • the first leak is a direct leak caused by the difference in pressure between the two fluids G 1 , G 2
  • the second leak is an entrained leak accompanying rotation of the rotor 1 .
  • Sealing mechanisms are normally provided in various locations of the heat exchanger in order to prevent direct leaks, and a radial sealing part on the high-temperature side which is one such mechanism comprises the sector plates 3 , 3 ′, constituting the fixed side, and a radial seal 1 b which is fitted to the rotor 1 , constituting the rotating side.
  • the upper sector plate 3 is connected to an upper external structure 2 ′ by way of adjuster rod 4
  • a static seal 5 is disposed on both sides of the gap between the sector plate 3 and the external structure of the heat exchanger in order to prevent direct leaks from the gap S between the external structure 2 ′ and the upper face of the sector plate 3 .
  • static seals 5 , 5 are disposed on both sides of the sector plate 3 , as shown in FIG. 5 , thereby providing an intermediate pressure zone, in order to enhance the sealing effect at the upper part of the sector plate 3 .
  • the static seals 5 consist of metal sheets.
  • the present invention is intended to resolve the abovementioned conventional problems, and the issue addressed by the present invention lies in providing a rotary regenerative heat exchanger which makes it possible to enhance the sealing effect and to prevent erosion, without any risk at all of deposits accumulating on the sector plate, and without inviting any impediment to operation of the rotary regenerative heat exchanger.
  • the rotary regenerative heat exchanger has a structure in which a rotor accommodating a heat storage body such as a heat transfer element is rotated inside a housing, the heat storage body is heated by means of a high-temperature heating fluid such as exhaust gas and stores the heat, and low-temperature fluid to be heated such as combustion air is heated by the heat stored in the heat storage body; and a sector plate for dividing the flow passages for the abovementioned two kinds of fluids, namely the heating fluid and the fluid to be heated, flowing through the inside of the rotor, is provided at the upper end face of the rotor with a slight gap therebetween, and a static seal is disposed on both sides of the gap between the sector plate and the external structure of the heat exchanger, said rotary regenerative heat exchanger being characterized in that a suction pipe is provided in the external structure in such a way as to suction dust material such as ash which has accumulated or been agitated on the sector plate.
  • a suction pipe is provided in the external structure
  • the rotary regenerative heat exchanger according to the present invention demonstrates the following advantages.
  • FIG. 1 is a main part structural illustration showing one exemplary embodiment of the present invention
  • FIG. 2 is a main part structural illustration showing a different exemplary embodiment of the present invention.
  • FIG. 3 is an overall oblique view of a rotary regenerative heat exchanger
  • FIG. 4 (A) is a schematic diagram in plan view of the main parts of a conventional rotary regenerative heat exchanger and (B) is a view in cross section along the line a-a in (A);
  • FIG. 5 illustrates the sealing structure at the upper part of the sector plate in a conventional rotary regenerative heat exchanger
  • FIG. 6 illustrates the problem with the sealing structure in FIG. 5 ;
  • FIG. 7 illustrates a different sealing structure at the upper part of the sector plate in a conventional rotary regenerative heat exchanger.
  • 2 ′ is an external structure
  • 3 is a sector plate
  • 5 is a static seal
  • 6 are blowing pipes and 7 is a suction pipe.
  • the blowing pipes 6 are provided in the external structure 2 ′ and are connected to a suitable blowing device (not depicted).
  • the blowing pipes 6 jet compressed air fed from the blowing device toward the upper face of the sector plate 3 in order to agitate dust material such as ash which has accumulated.
  • the suction pipe 7 is provided in the external structure 2 ′ and is connected to a suitable suction device (not depicted).
  • the suction pipe 7 suctions dust material such as ash which has been agitated or accumulated, by means of the suction action afforded by the suction device.
  • blowing pipes 6 are provided with a suitable gap therebetween in the widthwise direction of the sector plate 3 , and one suction pipe 7 is provided between the blowing pipes 6 , but the number and arrangement of the blowing pipes 6 and suction pipe 7 are not limited by the above, and the pipes may be suitably disposed in the lengthwise direction of the sector plate 3 or in any arrangement provided that dust material can be efficiently suctioned.
  • the jetting and suction actions afforded by the blowing pipes 6 and suction pipe 7 may be produced by either continuous operation or discontinuous (intermittent) operation.
  • only the suction pipe 7 may be operated, and the blowing pipes 6 operated when needed.
  • the blowing pipes 6 may be absent, depending on the case.
  • the rotary regenerative heat exchanger according to this exemplary embodiment is constructed in such a way that dust material such as ash which has intruded onto the sector plate 3 is removed at any time by means of the blowing pipes 6 and suction pipe 7 , or by means of the suction pipe 7 alone, and therefore movement of the sector plate 3 is no longer impeded by the accumulation of dust material and there is no risk that the rotary regenerative heat exchanger will cease operating.
  • FIG. 2 shows a different exemplary embodiment of the present invention, where 2 ′ is the external structure, 3 is the sector plate and 5 is the static seal.
  • any material may be used for the fabric cloth material 8 provided that it is a very flexible fabric which has a filter function with respect to dust material such as ash.
  • the fabric cloth material 8 is attached in a slackened state so that it can follow the vertical movement of the sector plate 3 . Furthermore, the fabric cloth material 8 is detachably attached by means of the attachment members 8 a and 8 b so that it can be easily replaced.
  • the rotary regenerative heat exchanger according to this exemplary embodiment is constructed in such a way that the fabric cloth material is joined along the region of the outer face at the tip end of the static seal 5 , and therefore the seal effect is enhanced, dust material such as ash does not intrude onto the sector plate 3 , and there is no risk of erosion.

Landscapes

  • 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)
  • Air Supply (AREA)
US13/708,954 2011-12-22 2012-12-08 Rotary regenerative heat exchanger Abandoned US20130160968A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-281662 2011-12-22
JP2011281662A JP5713884B2 (ja) 2011-12-22 2011-12-22 回転再生式熱交換器

Publications (1)

Publication Number Publication Date
US20130160968A1 true US20130160968A1 (en) 2013-06-27

Family

ID=48635462

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/708,954 Abandoned US20130160968A1 (en) 2011-12-22 2012-12-08 Rotary regenerative heat exchanger

Country Status (3)

Country Link
US (1) US20130160968A1 (ja)
JP (1) JP5713884B2 (ja)
CN (1) CN103175425B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110822468A (zh) * 2019-09-23 2020-02-21 西安交通大学 一种新型回转梯级蓄热式空气预热器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2629886T3 (es) 2012-08-15 2017-08-16 Beijingwest Industries Co. Ltd. Un aparato de soporte
CN113757706B (zh) * 2021-09-28 2023-12-05 华能(福建)能源开发有限公司福州分公司 一种空气预热器扇形板疏灰结构

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166496A (en) * 1978-08-21 1979-09-04 The Air Preheater Company, Inc. Static seal
US4372371A (en) * 1981-10-13 1983-02-08 The Air Preheater Company, Inc. Trunnion air seal
US5425543A (en) * 1993-09-17 1995-06-20 Buckshaw; Dennis J. Seal assembly for rotating shaft
US5577551A (en) * 1992-09-09 1996-11-26 Apparatebau Rothemuhle Brandt & Kritzler Gmbh Regenerative heat exchanger and method of operating the same
US5762128A (en) * 1996-11-15 1998-06-09 Abb Air Preheater, Inc. On-line regenerative air preheater fouling sensing system
US20100163208A1 (en) * 2008-12-17 2010-07-01 Balcke-Dürr GmbH Method For Operating A Regenerative Heat Exchanger And Regenerative Heat Exchanger Having Improved Efficiency
US20100251975A1 (en) * 2009-04-01 2010-10-07 Alstom Technology Ltd Economical use of air preheat
US20100251942A1 (en) * 2009-04-01 2010-10-07 Alstom Technology Ltd Reagent drying via excess air preheat
US20100289223A1 (en) * 2009-05-14 2010-11-18 Birmingham James W Regenerative heat exchanger and method of reducing gas leakage therein
US8157897B2 (en) * 2007-06-29 2012-04-17 Caterpillar Inc. Filter purge system utilizing impact wave generating device and vacuum source

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2945681A (en) * 1956-04-19 1960-07-19 Air Preheater Floating sector seals
JPS5952199A (ja) * 1982-09-20 1984-03-26 Nippon Furekuto Kk 清掃機能を備えた回転式熱交換器
JPS5977294A (ja) * 1982-10-25 1984-05-02 Nissan Motor Co Ltd 回転蓄熱式熱交換器のシ−ル装置
CN1003187B (zh) * 1985-06-05 1989-02-01 巴尔克德股份公司 蓄热式换热器
CN2150515Y (zh) * 1993-01-07 1993-12-22 浙江大学 自启动旋转式热分离机
JPH10110935A (ja) * 1996-10-08 1998-04-28 Abb Kk 回転再生式熱交換器による排煙処理装置
US6543520B2 (en) * 2001-02-21 2003-04-08 Alstom Power N.V. Low-distortion axial seal plate for air preheaters
JP2007127337A (ja) * 2005-11-04 2007-05-24 Matsushita Electric Ind Co Ltd 空気調和機

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166496A (en) * 1978-08-21 1979-09-04 The Air Preheater Company, Inc. Static seal
US4372371A (en) * 1981-10-13 1983-02-08 The Air Preheater Company, Inc. Trunnion air seal
US5577551A (en) * 1992-09-09 1996-11-26 Apparatebau Rothemuhle Brandt & Kritzler Gmbh Regenerative heat exchanger and method of operating the same
US5425543A (en) * 1993-09-17 1995-06-20 Buckshaw; Dennis J. Seal assembly for rotating shaft
US5762128A (en) * 1996-11-15 1998-06-09 Abb Air Preheater, Inc. On-line regenerative air preheater fouling sensing system
US8157897B2 (en) * 2007-06-29 2012-04-17 Caterpillar Inc. Filter purge system utilizing impact wave generating device and vacuum source
US20100163208A1 (en) * 2008-12-17 2010-07-01 Balcke-Dürr GmbH Method For Operating A Regenerative Heat Exchanger And Regenerative Heat Exchanger Having Improved Efficiency
US20100251975A1 (en) * 2009-04-01 2010-10-07 Alstom Technology Ltd Economical use of air preheat
US20100251942A1 (en) * 2009-04-01 2010-10-07 Alstom Technology Ltd Reagent drying via excess air preheat
US20100289223A1 (en) * 2009-05-14 2010-11-18 Birmingham James W Regenerative heat exchanger and method of reducing gas leakage therein

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110822468A (zh) * 2019-09-23 2020-02-21 西安交通大学 一种新型回转梯级蓄热式空气预热器

Also Published As

Publication number Publication date
CN103175425B (zh) 2015-07-08
CN103175425A (zh) 2013-06-26
JP2013130369A (ja) 2013-07-04
JP5713884B2 (ja) 2015-05-07

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AS Assignment

Owner name: ALSTOM TECHNOLOGY LTD, SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MITSUFUJI, KENGO;MARUYAMA, MASAHIKO;SUZUKI, DAISUKE;REEL/FRAME:029981/0388

Effective date: 20121219

AS Assignment

Owner name: ALSTOM ENERGY TECHNOLOGY AG, SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ALSTOM TECHNOLOGY LTD;REEL/FRAME:033865/0303

Effective date: 20141001

AS Assignment

Owner name: ARVOS TECHNOLOGY LIMITED, SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ALSTOM TECHNOLOGIE AG;REEL/FRAME:034863/0909

Effective date: 20140801

AS Assignment

Owner name: ARVOS INC., NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ARVOS TECHNOLOGY LIMITED;REEL/FRAME:037311/0503

Effective date: 20151026

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION