JPS63161396A - Method of removing scales from shell and tube type heat exchanger - Google Patents
Method of removing scales from shell and tube type heat exchangerInfo
- Publication number
- JPS63161396A JPS63161396A JP61307925A JP30792586A JPS63161396A JP S63161396 A JPS63161396 A JP S63161396A JP 61307925 A JP61307925 A JP 61307925A JP 30792586 A JP30792586 A JP 30792586A JP S63161396 A JPS63161396 A JP S63161396A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- tube
- heat transfer
- sound generator
- shell
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 9
- 239000002904 solvent Substances 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 238000004140 cleaning Methods 0.000 abstract description 4
- 238000000151 deposition Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- 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
- F28D7/06—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 having a single U-bend
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
- B08B7/026—Using sound waves
- B08B7/028—Using ultrasounds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G7/00—Cleaning by vibration or pressure waves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はシェルアンドチューブ型熱交換器の伝熱管に付
着したスケールを除去するスケール除去方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a scale removal method for removing scale attached to heat transfer tubes of a shell-and-tube heat exchanger.
（従来の技術）
原子力発電所で使用されているシェルアンドチューブ型
熱交換器の伝熱管では、伝熱管と伝熱管が貫通するバッ
フル板との間の隙間にスケールが付着、堆積する。即ち
、第４図に示す（１）が伝熱管、（２）がバッフル板で
、伝熱管（１）がバッフル板（２）を貫通して、互いの
間に隙間（流路）が形成されて、管外流体がこの隙間を
流れるようになっているが、長期間の使用中に、伝熱管
（１）やバッフル板（２）の腐食により生じたスケール
がこの隙間に付着、堆積しく第５図の（ｂ）参照）、同
隙間（流路）が閉塞されて、管外流体が淀む。また管外
流体が淀むと、腐食がさらに進んで、伝熱管（１）が損
傷するので、伝熱管（１）とバッフル仮（２）との間に
付着、堆積したスケール（ｂ）を定期的に除去する必要
があり、従来は、化学溶剤等を使用して、スケール（ｂ
）を除去するようにしている。(Prior Art) In the heat exchanger tubes of shell-and-tube heat exchangers used in nuclear power plants, scale adheres and accumulates in the gap between the heat exchanger tubes and the baffle plate through which the heat exchanger tubes pass. That is, as shown in Fig. 4, (1) is a heat exchanger tube, (2) is a baffle plate, and the heat exchanger tube (1) passes through the baffle plate (2), forming a gap (flow path) between them. The fluid outside the tube is designed to flow through this gap, but during long-term use, scale generated due to corrosion of the heat transfer tube (1) and baffle plate (2) adheres to and accumulates in this gap. (see (b) in Figure 5), the gap (flow path) is blocked and the extraluminal fluid stagnates. In addition, if the fluid outside the tube stagnates, corrosion will progress further and the heat transfer tube (1) will be damaged. Conventionally, scale (b) must be removed using chemical solvents, etc.
).
（発明が解決しようとする問題点）
前記従来のように伝熱管（１）とバッフル板（２）との
間に付着、堆積したスケール（ｂ）を化学溶剤等により
除去するのでは、除去が完全でなく、また除去後に洗浄
を必要として、スケール（ｂ）の除去に多くの手間と時
間とを要するという問題があった。(Problems to be Solved by the Invention) If the scale (b) attached and deposited between the heat exchanger tube (1) and the baffle plate (2) is removed using a chemical solvent etc. as in the conventional method, it is difficult to remove it. There was a problem in that the scale (b) was not completely removed and cleaning was required after removal, requiring much effort and time to remove the scale (b).
（問題点を解決するための手段）
本発明は前記の問題点に対処するもので、シェルアンド
チューブ型熱交換器の伝熱管に付着したスケールを除去
するに当たり、熱交換器胴内適所に取付けた音響発生器
を作動し、熱交換器胴内に大音響を発生させて、前記伝
熱管を振動させることを特徴としている。(Means for Solving the Problems) The present invention addresses the above-mentioned problems, and in order to remove scale attached to the heat exchanger tubes of a shell-and-tube heat exchanger, The heat exchanger is characterized in that a sound generator is activated to generate a loud sound inside the heat exchanger body, thereby vibrating the heat exchanger tubes.
本発明の目的とする処は、伝熱管に付着したスケールを
化学溶剤や洗浄を必要とせずに、迅速に。The purpose of the present invention is to quickly remove scale attached to heat transfer tubes without the need for chemical solvents or cleaning.
完全に除去できる改良されたシェルアンドチューブ型熱
交換器のスケール除去方法を供する点にある。An object of the present invention is to provide an improved method for removing scale from a shell-and-tube heat exchanger that can completely remove scale.
（作用）
本発明のシェルアンドチューブ型熱交換器のスケール除
去方法は前記のように熱交換器胴内適所に取付けた音響
発生器を作動して、熱交換器胴内に大音響を発生させ、
伝熱管を振動させて、伝熱管に付着したスケールを除去
する。(Function) The method for removing scale from a shell-and-tube heat exchanger according to the present invention operates a sound generator installed at an appropriate position inside the heat exchanger body as described above to generate a loud sound inside the heat exchanger body. ,
Vibrate the heat exchanger tube to remove scale attached to the heat exchanger tube.
（実施例）
次に本発明のシェルアンドチューブ型熱交換器のスケー
ル除去方法の実施に使用するスケール除去装置の一構成
例を第１．２図により説明すると。(Example) Next, an example of the configuration of a scale removal apparatus used for carrying out the method for removing scale from a shell-and-tube heat exchanger of the present invention will be described with reference to FIG. 1.2.
（１）が逆Ｕ字状の各伝熱管、（２）がバッフル板で。(1) is an inverted U-shaped heat exchanger tube, and (2) is a baffle plate.
上記各伝熱管（１）が同バッフル板（２）を貫通して。Each of the heat exchanger tubes (1) passes through the baffle plate (2).
互いの間に隙間（流路）が形成されている。また（３）
が上記各伝熱管（１）の両端開口部を支持する管板、（
４）が外胴、（５）が上記管板（３）よりも下方の外胴
（４）下部内（水室内）に配設した音響発生器。A gap (flow path) is formed between them. Also (3)
is a tube plate that supports both end openings of each of the heat exchanger tubes (1), (
4) is an outer shell, and (5) is a sound generator disposed in the lower part of the outer shell (4) below the tube plate (3) (inside the water chamber).
（５ａ）が同音響発生器（５）から上記管板（３）の伝
熱管（１）開口部へ延びたラッパ状の導波管、（６）が
同導波管（５ａ）の先端部と上記管板（３）の下面との
間に介装したパツキン、（８）が圧縮機（圧縮空気供給
源）、（７）が上記音響発生器（５）のスロットを断続
的に開閉作動させる音響発生器用制御装置である。(5a) is a trumpet-shaped waveguide extending from the acoustic generator (5) to the opening of the heat transfer tube (1) of the tube plate (3), and (6) is the tip of the waveguide (5a). and the lower surface of the tube plate (3), (8) is a compressor (compressed air supply source), and (7) is for intermittently opening and closing the slot of the sound generator (5). This is a control device for a sound generator.
次に前記第１，２図に示すスケール除去装置の作用を具
体的に説明する。圧縮空気を圧縮機（８）から音響発生
器（５）へ送る一方、同音響発生器（５）のスロットを
音響発生器用制御装置（７）からの信号により開閉作動
して、上記圧縮空気を音響発生器（５）から導波管（５
ａ）へ断続的に噴出し、そのとき生じる音圧（なお第２
図の（ａ）は音波）を各伝熱管（１）内に伝えて、同各
伝熱管（１）を振動させ、同伝熱管（１）とバッフル板
（２）との間の隙間等に付着、堆積したスケールを振る
い落として。Next, the operation of the scale removing device shown in FIGS. 1 and 2 will be explained in detail. While compressed air is sent from the compressor (8) to the sound generator (5), the slot of the sound generator (5) is opened and closed by a signal from the sound generator control device (7) to send the compressed air. From the acoustic generator (5) to the waveguide (5
a), and the sound pressure generated at that time (in addition, the second
In the figure (a), a sound wave (sonic wave) is transmitted into each heat exchanger tube (1), vibrating each heat exchanger tube (1), and filling the gap between the heat exchanger tube (1) and the baffle plate (2). Shake off the scale that has adhered and accumulated.
除去する。なお本実施例では、導波管（５ａ）を介して
複数本の伝熱管（１）を同時に振動させるとともに、こ
の振動をバッフルＦｉ（２）等を介して他の各伝熱管（
１）に伝えるようにしているが、導波管（５ａ）を介し
て１本の伝熱管（１）を振動させるとともに、この振動
をバッフル板（２）を介して他の各伝熱管（１）に伝え
るようにしてもよい。また各伝熱管（１）に負荷する音
の周波数は、特定されないが。Remove. In this example, a plurality of heat exchanger tubes (1) are simultaneously vibrated via a waveguide (5a), and this vibration is transmitted to each other heat exchanger tube (1) via a baffle Fi (2) etc.
1), one heat exchanger tube (1) is vibrated through the waveguide (5a), and this vibration is transmitted to each other heat exchanger tube (1) through the baffle plate (2). ). Furthermore, the frequency of the sound that is applied to each heat exchanger tube (1) is not specified.
各伝熱管（１）を振動させ易いように伝熱管（１）の音
響共鳴周波数や伝熱管（１）の共振周波数にするのが望
ましい。It is desirable to set the acoustic resonance frequency of the heat exchanger tube (1) or the resonance frequency of the heat exchanger tube (1) so that each heat exchanger tube (1) can be easily vibrated.
次に本発明のシェルアンドチューブ型熱交換器のスケー
ル除去方法の実施に使用するスケール除去装置の他の構
成例を第３図により説明すると。Next, another example of the structure of the scale removal apparatus used in carrying out the method for removing scale from a shell-and-tube heat exchanger of the present invention will be described with reference to FIG.
（１）が逆Ｕ字状の各伝熱管、（２）がバッフル板で。(1) is an inverted U-shaped heat exchanger tube, and (2) is a baffle plate.
上記各伝熱管（１）が同バッフル板（２）を貫通して。Each of the heat exchanger tubes (1) passes through the baffle plate (2).
互いの間に隙間（流路）が形成されている。また（３）
が上記各伝熱管（１）の両端開口部を支持する管板、（
４）が外胴、 （５） （５）が上記管板（３）よりも
上方の外胴（４）外面近傍に配設した音響発生器、（５
ａ） （５ａ）が同各音響発生器（５）から上記外胴（
４）外面へ延びたラッパ状の導波管、（８）が圧縮機（
圧縮空気供給源）、（７’）が発振器、 （９）’（９
）が同発振器（７°）と上記各音響発生器（５）との間
の電気回路に介装した増幅器である。A gap (flow path) is formed between them. Also (3)
is a tube plate that supports both end openings of each of the heat exchanger tubes (1), (
4) is an outer shell, (5) (5) is a sound generator disposed near the outer surface of the outer shell (4) above the tube plate (3), (5)
a) (5a) is connected from each sound generator (5) to the outer shell (
4) A trumpet-shaped waveguide extending to the outer surface, (8) is a compressor (
compressed air supply source), (7') is the oscillator, (9)' (9
) is an amplifier installed in the electric circuit between the oscillator (7°) and each of the acoustic generators (5).
次に前記第３図に示すスケール除去装置の作用を具体的
に説明する。圧縮空気を圧縮機（８）から音響発生器（
５）へ送る一方、同音響発生器（５）のスロットを発振
器（７゛）からの信号により開閉作動して、上記圧縮空
気を音響発生器（５）から導波管（５ａ）へ断続的に噴
出し、そのとき生じる音圧をシェルアンドチューブ型熱
交換器の外胴（４）に伝えて、同外胴（４）を振動させ
、同外胴（４）内に気柱共鳴を発生させて、各伝熱管（
１）を振動させ、同伝熱管（１）とバッフル板（２）と
の間の隙間等に付着、堆積したスケールを振るい落とし
て、除去する。Next, the operation of the scale removing device shown in FIG. 3 will be explained in detail. Compressed air is passed from the compressor (8) to the acoustic generator (
5), the slot of the acoustic generator (5) is opened and closed by the signal from the oscillator (7), and the compressed air is intermittently passed from the acoustic generator (5) to the waveguide (5a). The sound pressure generated at that time is transmitted to the outer shell (4) of the shell-and-tube heat exchanger, causing the outer shell (4) to vibrate and generating air column resonance within the outer shell (4). and each heat exchanger tube (
1) is vibrated to shake off and remove scale that has adhered or accumulated in the gap between the heat exchanger tube (1) and the baffle plate (2).
（発明の効果）
本発明のシェルアンドチューブ型熱交換器のスケール除
去方法は前記のように熱交換器胴内適所に取付けた音響
発生器を作動して、熱交換器胴内に大音響を発生させ、
伝熱管を振動させて、伝熱管に付着したスケールを除去
するので、伝熱管に付着したスケールを化学溶剤や洗浄
を必要とせずに、迅速に、完全に除去できる効果がある
。(Effects of the Invention) The method for removing scale from a shell-and-tube heat exchanger according to the present invention operates a sound generator installed at a suitable position inside the heat exchanger body as described above to generate a loud sound inside the heat exchanger body. generate,
Since the heat exchanger tubes are vibrated to remove scale attached to the heat exchanger tubes, the scale attached to the heat exchanger tubes can be quickly and completely removed without the need for chemical solvents or cleaning.
第１図は本発明に係わるシェルアンドチューブ型熱交換
器のスケール除去方法の実施に使用するスケール除去装
置の一構成例を示す縦断側面図。
第２図は導波管部分の拡大縦断側面図、第３図は他の構
成例を示す縦断側面図、第４図は伝熱管とバッフル板と
の関係を示す縦断側面図、第５図は伝熱管とバッフル板
との隙間に付着、堆積したスケールを示す縦断側面図で
ある。
（１）・・・伝熱管、（２）・・・バッフル板、（３）
・・・管板、（４）・・・外胴、（５）・・・音響発生
器、（５ａ）・・・導波管、 （７） （７”）・・・
音響発生器用制御装置、（８）・・・圧縮空気供給源。
復代理人弁理士岡本重文外２名FIG. 1 is a longitudinal sectional side view showing an example of the configuration of a scale removal device used to carry out the method for removing scale from a shell-and-tube heat exchanger according to the present invention. Figure 2 is an enlarged vertical side view of the waveguide section, Figure 3 is a vertical side view showing another configuration example, Figure 4 is a vertical side view showing the relationship between the heat exchanger tube and the baffle plate, and Figure 5 is a vertical side view showing the relationship between the heat exchanger tube and the baffle plate. FIG. 3 is a longitudinal cross-sectional side view showing scale that has adhered and accumulated in the gap between the heat exchanger tube and the baffle plate. (1)... Heat exchanger tube, (2)... Baffle plate, (3)
... tube plate, (4) ... outer shell, (5) ... acoustic generator, (5a) ... waveguide, (7) (7”) ...
Sound generator control device, (8)... compressed air supply source. Sub-representative patent attorney Shigefumi Okamoto and two others
Claims (1)
ケールを除去するに当たり、熱交換器胴内適所に取付け
た音響発生器を作動し、熱交換器胴内に大音響を発生さ
せて、前記伝熱管を振動させることを特徴としたシエル
アンドチューブ型熱交換器のスケール除去方法。To remove scale attached to the heat transfer tubes of a shell-and-tube heat exchanger, a sound generator installed at a suitable location inside the heat exchanger shell is activated to generate a loud sound inside the heat exchanger shell. A method for removing scale from a shell-and-tube heat exchanger, which is characterized by vibrating the heat tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61307925A JPS63161396A (en) | 1986-12-25 | 1986-12-25 | Method of removing scales from shell and tube type heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61307925A JPS63161396A (en) | 1986-12-25 | 1986-12-25 | Method of removing scales from shell and tube type heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63161396A true JPS63161396A (en) | 1988-07-05 |
Family
ID=17974817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61307925A Pending JPS63161396A (en) | 1986-12-25 | 1986-12-25 | Method of removing scales from shell and tube type heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63161396A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0961090A (en) * | 1995-08-25 | 1997-03-07 | Babcock Hitachi Kk | Cleaning device of tube body |
| JPH0961088A (en) * | 1995-08-24 | 1997-03-07 | Babcock Hitachi Kk | Cleaning device of tube body |
| JP2002233456A (en) * | 2001-02-08 | 2002-08-20 | Frontier Engineering:Kk | Heating device for food and drink |
| JP2009243726A (en) * | 2008-03-31 | 2009-10-22 | Honda Electronic Co Ltd | Clogging detecting device for cooling tank |
| CN115014097A (en) * | 2019-12-03 | 2022-09-06 | 山东大学 | Shell-and-tube heat exchanger with different heating powers |
| CN115014099A (en) * | 2019-12-03 | 2022-09-06 | 山东大学 | Shell-and-tube heat exchanger for periodic variation heating |
-
1986
- 1986-12-25 JP JP61307925A patent/JPS63161396A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0961088A (en) * | 1995-08-24 | 1997-03-07 | Babcock Hitachi Kk | Cleaning device of tube body |
| JPH0961090A (en) * | 1995-08-25 | 1997-03-07 | Babcock Hitachi Kk | Cleaning device of tube body |
| JP2002233456A (en) * | 2001-02-08 | 2002-08-20 | Frontier Engineering:Kk | Heating device for food and drink |
| JP2009243726A (en) * | 2008-03-31 | 2009-10-22 | Honda Electronic Co Ltd | Clogging detecting device for cooling tank |
| CN115014097A (en) * | 2019-12-03 | 2022-09-06 | 山东大学 | Shell-and-tube heat exchanger with different heating powers |
| CN115014099A (en) * | 2019-12-03 | 2022-09-06 | 山东大学 | Shell-and-tube heat exchanger for periodic variation heating |
| CN115014099B (en) * | 2019-12-03 | 2023-08-22 | 山东大学 | Tube-shell heat exchanger with periodically-changing heating function |
| CN115014097B (en) * | 2019-12-03 | 2023-08-22 | 山东大学 | Shell-and-tube heat exchanger with different heating powers |
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