WO2015098198A1 - 熱交換器 - Google Patents
熱交換器 Download PDFInfo
- Publication number
- WO2015098198A1 WO2015098198A1 PCT/JP2014/073986 JP2014073986W WO2015098198A1 WO 2015098198 A1 WO2015098198 A1 WO 2015098198A1 JP 2014073986 W JP2014073986 W JP 2014073986W WO 2015098198 A1 WO2015098198 A1 WO 2015098198A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat transfer
- resonance
- heat exchanger
- transfer tubes
- combustion gas
- Prior art date
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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
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
- F22B37/20—Supporting arrangements, e.g. for securing water-tube sets
-
- 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
- F28D7/1615—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 the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
- F28F2009/222—Particular guide plates, baffles or deflectors, e.g. having particular orientation relative to an elongated casing or conduit
- F28F2009/224—Longitudinal partitions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
- F28F2265/30—Safety or protection arrangements; Arrangements for preventing malfunction for preventing vibrations
Definitions
- the present invention relates to a heat exchanger provided in a boiler or the like and provided with anti-resonance baffles between heat transfer tube groups.
- a heat exchanger such as a superheater, a reheater, or an economizer is provided in a duct housing that forms a flow path of combustion gas.
- a large number of heat transfer tubes are provided in the duct housing, and a medium such as water flowing through the heat transfer tubes is heated by the combustion gas and converted into steam.
- the steam is sent to a steam turbine and used as a power for power generation.
- the plurality of heat transfer tubes are arranged such that the axial direction crosses the flow path of the combustion gas, and they are arranged in parallel at intervals.
- the heat transfer tube is disposed in a direction orthogonal to the combustion gas g inside a duct wall forming a flow path of the combustion gas.
- FIG. 4 shows an example in which the heat transfer pipes 102 are arranged in a lattice shape in the flow path of the combustion gas g inside the duct wall 100 forming the flow path of the combustion gas g, and
- FIG. It shows an example arranged in a staggered pattern.
- a Karman vortex e is periodically generated in the downstream of the heat transfer tube 102.
- FIG. 8 shows an example in which the anti-resonance baffle plate 104 is provided.
- the duct wall 100 forms a flow path for the combustion gas g.
- the heat transfer pipe 102 is disposed in the flow path of the combustion gas g in a direction orthogonal to the flow direction of the combustion gas g.
- the anti-resonance baffle plate 104 is disposed between the heat transfer tubes 102 along the flow direction of the combustion gas g.
- Patent Documents 1 and 2 in a heat exchanger in which a large number of heat transfer tubes are arranged in parallel in the flow path of the heat exchange gas, resonance is prevented along the flow direction of the heat exchange fluid between the heat transfer pipes.
- An arrangement is disclosed in which a baffle plate is provided.
- the conventional anti-resonance baffle plate has a large weight, and in order to fix the heavy anti-resonance baffle plate in the flow path of the heat exchange fluid, it takes a lot of man-hours and costs. is there.
- a heat exchanger comprises a large number of heat exchangers arranged axially across the flow path of the heat exchange fluid and spaced from one another in parallel.
- a heat exchanger comprising: a heat transfer tube; and a plate-like anti-resonance baffle provided along a flow direction of a heat exchange fluid between a plurality of heat transfer tubes, wherein the anti-resonance baffle is made of metal foil ing.
- the anti-resonance baffle plate raises the natural vibration frequency fn generated between the duct walls forming the flow path of the heat exchange fluid, and is generated by the natural vibration frequency fn and the Karman vortex e generated in the wake of the heat transfer tube It has the effect of making it different from the frequency fk.
- the anti-resonance baffle by configuring the anti-resonance baffle with metal foil, the anti-resonance baffle can be reduced in weight. Therefore, the material cost can be saved, and the work required for attaching and replacing the anti-resonance baffle plate can be simplified and the cost can be reduced.
- One embodiment of the present invention further comprises a rigid frame fixed to the outer edge of the metal foil.
- the metal foil may be deformed in response to the heat exchange fluid, so by fixing the rigid frame to the metal foil, the metal foil can be given rigidity.
- deformation of the metal foil can be prevented, and the rigidity not to be deformed by the flow of the heat exchange fluid can be maintained without increasing the weight.
- the anti-resonance baffle is secured to at least a portion of the plurality of heat transfer tubes by fasteners.
- the anti-resonance baffle of the present invention can be reduced in weight, it can be easily attached to the heat transfer tube using a low-strength fixture.
- the anti-resonance baffle is lightweight, it is sufficient to attach it to only a portion of the heat transfer tubes, and the installation work can be reduced.
- the fixture is a U-shaped bolt arranged to surround the heat transfer tube and screwed at both ends to the anti-resonance baffle plate.
- the plurality of heat transfer tubes are linearly arranged along the flow direction of the heat exchange fluid, and the anti-resonance baffle is formed in a flat plate shape and disposed along the flow direction of the heat exchange fluid It is done.
- the anti-resonance baffle plate to be easily inserted between the prefabricated heat transfer tubes and to be in place. Therefore, the installation operation or the replacement operation of the anti-resonance baffle can be performed without removing the existing heat transfer tube.
- the heat transfer tubes need not be installed after the anti-resonance baffles are installed, and the number of installation and replacement operations can be significantly reduced.
- the work required for attaching the anti-resonance baffle can be simplified and reduced in cost.
- FIG. 5 is a perspective view of the anti-resonance baffle plate after assembly.
- FIG. 1 A heat exchanger according to an embodiment of the present invention will be described based on FIGS. 1 to 3.
- FIG. The present embodiment relates to a superheater, a reheater, a heat exchanger such as a economizer, a waste heat recovery boiler or the like according to an embodiment of the present invention, which is provided in a steam boiler incorporated in a thermal power plant or the like. It is an example to which heat exchanger 10 is applied.
- the flow path of the combustion gas g is formed of the duct housing which comprises the heat exchanger 10 which concerns on this embodiment.
- a large number of heat transfer tubes 14 are disposed inside a duct wall 12 constituting a duct housing.
- the duct housing has, for example, a square or circular cross section.
- a large number of heat transfer tubes 14 are arranged in parallel spaced apart from one another, and their axial directions are arranged in a direction perpendicular to the combustion gas g.
- the large number of heat transfer tubes 14 are arranged in a grid. That is, the respective rows constituted by the plurality of heat transfer pipes 14 are arranged linearly in the flow direction of the combustion gas g, and are also arranged linearly in the direction orthogonal to the flow direction of the combustion gas g.
- the combustion gas g exchanges heat with the medium such as water flowing inside the heat transfer tubes 14 as it passes between the heat transfer tubes 14, and the medium such as water is heated by the combustion gas g and converted to steam.
- the steam is sent to a steam turbine and used as a power for power generation.
- the anti-resonance baffle 16 is formed of a metal foil 18 having a flat surface and is disposed along the flow direction of the combustion gas g.
- the anti-resonance baffle plate 16 is formed of a square metal foil 18 made of a thin high-temperature stainless steel (SUH409L) having a thickness of 10 ⁇ m to 1000 ⁇ m, for example, 20 ⁇ m.
- the material of the metal foil 18 is selected based on the temperature of the heat exchange fluid, and the thickness of the metal foil 18 is selected based on the hardness, viscosity, etc. of the selected material.
- the length of one side of the metal foil used in the present invention is determined by the length of the boiler casing and the number of stages of the heat exchanger, and is, for example, 20 m (duct width) x 2 m (the number of heat exchanger stages).
- the metal foil 18 is deformed in response to the combustion gas flow. Therefore, the outer edge part of the metal foil 18 is clamped by the rigid frame 20,20 from both sides.
- the two frames 20 and 20 are fastened at the necessary points with bolts 22 and nuts 24.
- the head of the bolt 22 and the nut 24 are made to sink to the frames 20, 20 as much as possible so as not to disturb the combustion gas flow.
- the anti-resonance baffle plate 16 is fixed to the heat transfer tube 14 using a U-shaped bolt 26. That is, the U-shaped bolt 26 is disposed so as to surround the heat transfer tube 14 by using the U-shaped bolt 26 having male threads formed at both ends, and the male threads at both ends of the U-shaped bolt 26 are Screw into the formed female screw hole. Alternatively, both ends are inserted into the round holes formed in the anti-resonance baffle plate 16, and the anti-resonance baffle plate 16 is fixed to the heat transfer tube 14 by screwing the nut 28 into the male thread.
- the attachment point using the U-shaped bolt 26 may be an attachment point necessary to obtain the necessary fixed strength of the anti-resonance baffle 16.
- the weight can be reduced. Therefore, the material cost can be saved, and the work required for attaching and replacing the anti-resonance baffle plate 16 can be simplified and the cost can be reduced. Moreover, since the outer edge part of the metal foil 18 is fastened from both sides by the two rigid frames 20, 20, the rigidity which does not deform
- the anti-resonance baffle plate 16 can be reduced in weight, it can be easily attached to the heat transfer tube 14 using a low-strength fixing tool. Therefore, the anti-resonance baffle plate 16 can be firmly fixed using a low cost fixing tool. Further, since the anti-resonance baffle plate 16 is light in weight, it is sufficient to attach it only to a part of the heat transfer tubes 14, and the installation work can be reduced. Moreover, since the U-shaped bolt 26 is used as a fixing means of the anti-resonance baffle plate 16, the mounting operation can be further simplified.
- the anti-resonance baffle plate 16 can be easily inserted between the heat transfer tubes 14 already manufactured. It can be arranged. Therefore, the installation operation or the replacement operation of the anti-resonance baffle plate 16 can be performed without removing the heat transfer tube 14 already manufactured or without installing the heat transfer tube 14 after the anti-resonance baffle plate 16 is attached.
- the present invention is applied to a heat exchanger having heat transfer tubes arranged in a grid, but the present invention is a zigzag or zigzag shape by devising a method of fixing metal foils.
- the present invention is also applicable to a heat exchanger having heat transfer tubes arranged in.
- the configuration of the resonance preventing baffle plate and the work required for its installation are simplified and cost reduced. can do.
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)
Abstract
Description
fk=St・V/D (1)
ここで、St:ストローハル数
V:最小隙間流速(伝熱管間の流速)
D:伝熱管の外径
fn=n・c/2L (2)
ここで、n=1,2,3、・・・
c:音速(燃焼ガスgの温度に依存する。)
L:ダクト壁100間の幅
図8は、かかる共鳴防止バッフル板104を設けた例を示している。図8において、ダクト壁100によって燃焼ガスgの流路が形成されている。伝熱管102は燃焼ガスgの流路中に、燃焼ガスgの流れ方向と直交する方向に配置されている。共鳴防止バッフル板104は伝熱管102の間で燃焼ガスgの流れ方向に沿って配置されている。
固有振動周波数fnを上昇させためには、被熱交換流体の流路を仕切り、被熱交換流体の粒子速度=0の境界を形成すればよい。そのため、金属箔のような薄い仕切り板でも前記作用を得ることができる。
前述のように、本発明の共鳴防止バッフルは軽量化が可能になるので、低強度の固定具を用いて簡単に伝熱管に取り付けることができる。また、共鳴防止バッフルは軽量であるため、一部の伝熱管のみに取り付ければ足り、取付け作業を軽減できる。
これによって、共鳴防止バッフル板を既製の伝熱管の間に容易に挿入でき、所定位置に配置できる。そのため、既製の伝熱管を取り外すことなく、共鳴防止バッフルの取付け作業又は交換作業を行うことができる。さらに、伝熱管の設置を共鳴防止バッフルの取り付けた後にする必要がなくなり、取付け作業及び交換作業の工数を大幅に低減できる。
燃焼ガスgは各伝熱管14の間を通るとき各伝熱管14の内部を流れる水などの媒体と熱交換し、水などの媒体は燃焼ガスgで加熱されて蒸気に変わる。該蒸気は蒸気タービンに送られ、発電動力として用いられる。
なお、本発明で使用する金属箔の一辺の長さは、ボイラケーシングの長さ、熱交換器の段数によって決まり、例えば、20m(ダクト幅)×2m(熱交換器段数)である。
なお、U字ボルト26を用いた取付け箇所は、共鳴防止バッフル16の必要固定強度を得るのに必要な取付け箇所とすればよい。
また、2枚の剛性の枠体20,20で金属箔18の外縁部を両側から締結したため、あまり重量を増加させることなく燃焼ガス流に対して変形しない剛性を保持できる。
また、共鳴防止バッフル板16は軽量であるため、一部の伝熱管14のみに取り付ければ足り、取付け作業を軽減できる。
また、共鳴防止バッフル板16の固定手段としてU字ボルト26を用いているため、取付け作業をさらに簡便化できる。
そのため、既製の伝熱管14を取り外すことなく、あるいは伝熱管14の設置を共鳴防止バッフル板16を取り付けた後ですることなく、共鳴防止バッフル板16の取付け作業又は交換作業を行うことができる。
12,100 ダクト壁
14,102 伝熱管
16,104 共鳴防止バッフル板
18 金属箔
20 枠体
22 ボルト
24、28 ナット
26 U字ボルト
e カルマン渦
g 燃焼ガス
Claims (5)
- 軸方向が被熱交換流体の流路を横切る方向に配置され、かつ互いに間隔を置いて並列に配置された多数の伝熱管と、
前記多数の伝熱管の間で被熱交換流体の流れ方向に沿って設けられた板状の共鳴防止バッフルとを有する熱交換器であって、
前記共鳴防止バッフルは金属箔で構成されていることを特徴とする熱交換器。 - 前記金属箔の外縁部に固定された剛性枠体をさらに備えていることを特徴とする請求項
1に記載の熱交換器。 - 前記共鳴防止バッフルは前記多数の伝熱管の少なくとも一部に固定具によって固定されていることを特徴とする請求項1に記載の熱交換器。
- 前記固定具は、前記伝熱管を囲繞するように配置され両端が前記共鳴防止バッフルに螺着されたU字ボルトであることを特徴とする請求項3に記載の熱交換器。
- 前記多数の伝熱管は被熱交換流体の流れ方向に沿って直線状に配列され、
前記共鳴防止バッフルは平板状に形成され、被熱交換流体の流れ方向に沿って配置されていることを特徴とする請求項1に記載の熱交換器。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020167013511A KR20160074655A (ko) | 2013-12-27 | 2014-09-10 | 열교환기 |
CN201480057683.2A CN105659048A (zh) | 2013-12-27 | 2014-09-10 | 热交换器 |
US15/035,835 US20160290742A1 (en) | 2013-12-27 | 2014-09-10 | Heat exchanger |
DE112014006052.6T DE112014006052T5 (de) | 2013-12-27 | 2014-09-10 | Wämetauscher |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013-271370 | 2013-12-27 | ||
JP2013271370A JP5964286B2 (ja) | 2013-12-27 | 2013-12-27 | 熱交換器 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015098198A1 true WO2015098198A1 (ja) | 2015-07-02 |
Family
ID=53478081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2014/073986 WO2015098198A1 (ja) | 2013-12-27 | 2014-09-10 | 熱交換器 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20160290742A1 (ja) |
JP (1) | JP5964286B2 (ja) |
KR (1) | KR20160074655A (ja) |
CN (1) | CN105659048A (ja) |
DE (1) | DE112014006052T5 (ja) |
WO (1) | WO2015098198A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201220471D0 (en) * | 2012-11-14 | 2012-12-26 | Technology Partnership The | Pump |
US9958217B1 (en) * | 2013-06-19 | 2018-05-01 | Nooter/Eriksen, Inc. | Baffle system and method for a heat exchanger located within a casing of a heat recovery steam generator |
US9897386B2 (en) * | 2015-08-10 | 2018-02-20 | Indmar Products Company Inc. | Marine engine heat exchanger |
US11105569B2 (en) * | 2019-03-05 | 2021-08-31 | Hamilton Sundstrand Corporation | Heat exchanger spray tube |
WO2022117129A1 (en) * | 2020-12-01 | 2022-06-09 | Vysoké Učení Technické V Brně | Tubular shell heat exchanger with cross flow |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5971092U (ja) * | 1982-11-05 | 1984-05-14 | 三菱重工業株式会社 | 多管式熱交換器におけるバツフル板構造 |
JPS59108087U (ja) * | 1982-12-29 | 1984-07-20 | 三菱重工業株式会社 | 防振型熱交換器 |
JPH11223329A (ja) * | 1998-02-06 | 1999-08-17 | Mitsubishi Heavy Ind Ltd | 灰粒子堆積防止セラミック吸音板 |
JP2001349505A (ja) * | 2000-06-07 | 2001-12-21 | Mitsubishi Heavy Ind Ltd | ボイラ用騒音防止装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5912293A (ja) | 1982-07-12 | 1984-01-21 | Mitsubishi Heavy Ind Ltd | 熱交換器における防振バツフル |
JPS5971092A (ja) * | 1982-10-18 | 1984-04-21 | 横河電機株式会社 | 画像デ−タ処理装置 |
JPS61134595A (ja) * | 1984-12-05 | 1986-06-21 | Mitsubishi Heavy Ind Ltd | 熱交換器の伝熱管防振支持装置 |
JP2635869B2 (ja) | 1991-11-20 | 1997-07-30 | 株式会社東芝 | 熱交換器 |
CN201657504U (zh) * | 2009-12-29 | 2010-11-24 | 深南电路有限公司 | 板件固定边框 |
-
2013
- 2013-12-27 JP JP2013271370A patent/JP5964286B2/ja not_active Expired - Fee Related
-
2014
- 2014-09-10 KR KR1020167013511A patent/KR20160074655A/ko not_active Application Discontinuation
- 2014-09-10 DE DE112014006052.6T patent/DE112014006052T5/de not_active Ceased
- 2014-09-10 US US15/035,835 patent/US20160290742A1/en not_active Abandoned
- 2014-09-10 WO PCT/JP2014/073986 patent/WO2015098198A1/ja active Application Filing
- 2014-09-10 CN CN201480057683.2A patent/CN105659048A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5971092U (ja) * | 1982-11-05 | 1984-05-14 | 三菱重工業株式会社 | 多管式熱交換器におけるバツフル板構造 |
JPS59108087U (ja) * | 1982-12-29 | 1984-07-20 | 三菱重工業株式会社 | 防振型熱交換器 |
JPH11223329A (ja) * | 1998-02-06 | 1999-08-17 | Mitsubishi Heavy Ind Ltd | 灰粒子堆積防止セラミック吸音板 |
JP2001349505A (ja) * | 2000-06-07 | 2001-12-21 | Mitsubishi Heavy Ind Ltd | ボイラ用騒音防止装置 |
Also Published As
Publication number | Publication date |
---|---|
DE112014006052T5 (de) | 2016-09-15 |
KR20160074655A (ko) | 2016-06-28 |
JP5964286B2 (ja) | 2016-08-03 |
CN105659048A (zh) | 2016-06-08 |
US20160290742A1 (en) | 2016-10-06 |
JP2015124966A (ja) | 2015-07-06 |
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