JPH05280889A - Cleaning ball - Google Patents
Cleaning ballInfo
- Publication number
- JPH05280889A JPH05280889A JP7964292A JP7964292A JPH05280889A JP H05280889 A JPH05280889 A JP H05280889A JP 7964292 A JP7964292 A JP 7964292A JP 7964292 A JP7964292 A JP 7964292A JP H05280889 A JPH05280889 A JP H05280889A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- heat transfer
- particle size
- sphere
- cleaning
- 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
Landscapes
- Cleaning In General (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、管式熱交換器における
伝熱管内壁を洗浄する装置に使用され、特に銅合金で作
られた伝熱管に好適な洗浄ボールに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning ball used in a device for cleaning an inner wall of a heat transfer tube in a tube heat exchanger, and particularly suitable for a heat transfer tube made of a copper alloy.
【0002】[0002]
【従来の技術】発電所等における復水器或は空調設備に
使用される熱交換器では、冷却水が通る管式熱交換器の
伝熱管内にスライムや藻等が付着することにより、経時
的に熱交換効率が低下することがある。このため従来か
ら伝熱管内の洗浄が行われており、その代表的な洗浄方
法として、伝熱管の内径より若干大きく変形し易い洗浄
体、例えばスポンジゴム製ボールを、伝熱管内に強制的
かつ連続的に通して、管内壁に付着したスケール等を除
去する方法が知られている。そしてこの方法に使用され
る洗浄体は、通常、水流と共に移動し易く、しかも水が
十分浸透するように連続気泡のスポンジゴム材質よりで
きている(特開昭58−210500号公報)。2. Description of the Related Art In heat exchangers used in condensers or air-conditioning equipment in power plants, etc., due to the adherence of slime, algae, etc. in the heat transfer tubes of the tubular heat exchanger through which cooling water passes, The heat exchange efficiency may decrease. For this reason, the inside of the heat transfer tube has been conventionally cleaned, and as a typical cleaning method, a cleaning body that is easily deformed slightly larger than the inner diameter of the heat transfer tube, for example, a sponge rubber ball, is forced into the heat transfer tube. A method is known in which the scale and the like adhering to the inner wall of the pipe are removed by continuous passage. The cleaning body used in this method is usually made of a sponge rubber material having open cells so that the cleaning body easily moves with the water flow and the water sufficiently penetrates (Japanese Patent Laid-Open No. 58-210500).
【0003】しかしスポンジゴム材質単独では、スライ
ム量が多い場合や、スライムが硬い場合にあっては除去
が難かしく、時間もかかる。そこで洗浄効率向上のた
め、スポンジボールの表面に合成樹脂やカーボランダム
等の硬質の粒子をコーティングしたもの(実公昭45−
30242号公報、実開昭60−81493号公報)が
提案されている。However, if the sponge rubber material alone is used, it is difficult and difficult to remove if the amount of slime is large or if the slime is hard. To improve cleaning efficiency, sponge balls are coated with hard particles such as synthetic resin and carborundum (Jitsuko Sho-45-
No. 30242, and Japanese Utility Model Laid-Open No. 60-81493) are proposed.
【0004】[0004]
【発明が解決しようとする課題】ところで、伝熱管は、
熱伝導率向上のため銅合金管が使用されているが、冷却
水を海水とした場合などでは、腐食防止のため管内壁の
表面に鉄の保護被膜が形成される様に管理されており、
一般には海水中に少量の硫酸第一鉄を注入することによ
って管内壁に保護被膜が形成できる。By the way, the heat transfer tube is
Copper alloy pipes are used to improve thermal conductivity, but when cooling water is seawater, it is controlled so that a protective iron film is formed on the inner wall surface of the pipes to prevent corrosion.
In general, a protective coating can be formed on the inner wall of a pipe by injecting a small amount of ferrous sulfate into seawater.
【0005】この保護被膜は、洗浄時に伝熱管内を通過
する洗浄ボールがスポンジゴム材質単独である場合は、
大きく消耗されることはないが、上述の如くスポンジゴ
ム材質単独ではそれ自体の磨減が激しく、その割には管
内スライムの除去効率が小さくて時間がかかる欠点があ
る。他方、除去効率向上の目的で、スポンジボールの表
面に硬質の合成樹脂をコーティングしたものを使用した
り、特に硬いスライムの除去等のためにカーボランダム
をコーティングしたものの使用も、上述の如く提案され
ているが、この場合には、硬い合成樹脂やカーボランダ
ムの研磨作用により、鉄を主体とした上記保護被膜が削
り取られ、伝熱管の内面が局部的に潰食するなどの問題
が生じる。This protective coating is provided when the cleaning balls passing through the heat transfer tube during cleaning are made of sponge rubber alone.
Although it is not largely consumed, the sponge rubber material alone is severely worn out as described above, but the slime removing efficiency in the pipe is small and time-consuming. On the other hand, for the purpose of improving the removal efficiency, use of a sponge ball coated with a hard synthetic resin, or use of a carborundum coated for removal of hard slime is also proposed as described above. However, in this case, the protective film mainly composed of iron is scraped off by the polishing action of the hard synthetic resin or the carborundum, which causes a problem that the inner surface of the heat transfer tube is locally eroded.
【0006】このため、耐摩耗性が高く、かつ管内のス
ライムなどの除去効率に優れ、それでいて、鉄による管
内壁の保護被膜を損傷することのない洗浄体が強く要求
されるようになってきた。For this reason, there has been a strong demand for a cleaning body which has high wear resistance and is excellent in the efficiency of removing slime in the pipe, and yet does not damage the protective coating on the inner wall of the pipe by iron. ..
【0007】本発明は、このような現状に鑑みなされた
ものであり、その目的は洗浄効率が良く、伝熱管内壁の
鉄保護被膜を削りとることのない洗浄ボールを提供する
ことにある。The present invention has been made in view of the above circumstances, and an object thereof is to provide a cleaning ball which has good cleaning efficiency and does not scrape off the iron protective coating on the inner wall of the heat transfer tube.
【0008】[0008]
【課題を解決するための手段及び作用】上記目的を達成
するためになされた本発明の洗浄ボールの特徴は、管式
熱交換器の伝熱管内面を洗浄する洗浄体であって、伝熱
管内径より僅かに大きい外径を有し、冷却水流によって
伝熱管の内面に接触しながら通過可能な軟らかさを有す
る連続気泡のスポンジゴム球体と、この表面に接着され
た粒状研磨材とからこの洗浄体を構成し、しかもこの粒
状研磨材は、例えば天然合成ゴム,合成樹脂,あるいは
エラストマー等を素材としたJISA50〜90の硬さ
を有していて、かつこれの接着によりスポンジ球体の表
面を凹凸とできる程度の粒径、一般的には0.3〜2.
0mm程度の粒径を有するところにある。The feature of the cleaning ball of the present invention made to achieve the above object is that it is a cleaning body for cleaning the inner surface of the heat transfer tube of the tubular heat exchanger. This cleaning body is composed of sponge rubber spheres having a slightly larger outer diameter and having a softness that allows passage through the inner surface of the heat transfer tube while being in contact with the cooling water flow, and a granular abrasive adhered to this surface. Moreover, the granular abrasive has a hardness of JIS A50 to 90 made of, for example, natural synthetic rubber, synthetic resin, or elastomer, and the surface of the sponge sphere is made uneven by the adhesion thereof. Particle size to the extent possible, generally 0.3-2.
It has a particle size of about 0 mm.
【0009】上記の伝熱管の腐食防止のため設けられる
鉄保護被膜は、伝熱効率よりそれ程厚くできないもので
あり、洗浄ボール表面に硬質の合成樹脂等を付着させる
とこれにより削り取られてしまうが、本発明の上記した
JISA50〜90好ましくは60〜80範囲の硬さの
粒状研磨材を用いると、保護被膜が削り取られることも
なく、スライムの除去効率も合成樹脂と変らずに得られ
るものとなる。The iron protective coating provided to prevent corrosion of the heat transfer tube cannot be made so thick as to improve heat transfer efficiency, and if a hard synthetic resin or the like is attached to the surface of the cleaning ball, it will be scraped off. Use of the above-mentioned JIS A50-90, preferably 60-80, range of granular abrasives of the present invention makes it possible to obtain the same slime removal efficiency as the synthetic resin, without the protective coating being scraped off. ..
【0010】又スライムの状況によりゴム材質の硬さを
変えることで洗浄ボールの寿命を伸ばすこともできる。The life of the cleaning ball can be extended by changing the hardness of the rubber material depending on the slime condition.
【0011】粒状研磨材は、その粒子の大きさもスライ
ムの除去に影響を与える。すなわち、管内壁のスライム
は洗浄ボールの通過後、屑として冷却水中に浮遊し一緒
に流出するが、一部は洗浄ボール表面の粒状研磨材の間
に詰まりボールと共に移動する。このため粒子の大きさ
は0.3〜2.0mmが良く、好ましくは0.5〜1.
0mmである。0.3mm以下では、洗浄ボールの表面
にこれを接着させた時に接着剤中に埋没して、スライム
を削除する性能が低下する。他方、2.0mm以上で
は、洗浄ボール表面に突出し過ぎて管内壁との摩擦抵抗
が大きくなりスムーズに流れなくなり、又接着剤で粒子
を保持することが困難になり脱落してしまう。この脱落
防止のため接着剤層を厚くして粒子を確実に保持するよ
うにすると、接着剤層が防止膜となって水がスポンジボ
ールに浸透せずに見かけ比重が軽くなって、その結果、
装置内に自由水面があると洗浄ボールが浮上して水面に
浮遊し、伝熱管への通過が円滑に行なわれなくなってし
まう。The particle size of the granular abrasive also affects the removal of slime. That is, the slime on the inner wall of the pipe floats in the cooling water as dust after passing through the cleaning ball and flows out together, but a part of the slime moves along with the clogged ball between the granular abrasives on the surface of the cleaning ball. Therefore, the particle size is preferably 0.3 to 2.0 mm, and preferably 0.5 to 1.
It is 0 mm. When it is 0.3 mm or less, when the cleaning ball is adhered to the surface of the cleaning ball, it is buried in the adhesive and the performance of removing slime deteriorates. On the other hand, if it is 2.0 mm or more, the particles are excessively projected on the surface of the cleaning ball and the frictional resistance with the inner wall of the tube is increased so that the particles do not flow smoothly, and it becomes difficult to hold the particles with an adhesive and the particles fall off. If the adhesive layer is thickened to securely hold the particles in order to prevent the particles from falling off, the adhesive layer serves as a preventive film to prevent water from penetrating into the sponge balls, resulting in a lighter specific gravity.
If there is a free water surface inside the device, the cleaning balls will float and float on the water surface, which will prevent smooth passage to the heat transfer tubes.
【0012】[0012]
【実施例】以下本発明を実施例に基いて説明する。EXAMPLES The present invention will be described below based on examples.
【0013】図1は本発明の洗浄ボールの断面図、図2
は本発明の表面部分の拡大図、図3は粒状研磨材をコー
ティングしていない比較例のスポンジゴムボールの断面
図、図4は伝熱管の摩耗装置を示す。FIG. 1 is a sectional view of the cleaning ball of the present invention, FIG.
Is an enlarged view of the surface portion of the present invention, FIG. 3 is a cross-sectional view of a sponge rubber ball of a comparative example which is not coated with a granular abrasive, and FIG. 4 shows a heat transfer tube wear device.
【0014】実施例1. (1)外径24mm、見掛け比重0.25の天然ゴム製
の連泡スポンジの表面にクロロプレン系接着剤(セメダ
イン570(セメダイン社製))を有機溶剤にて濃度を
調整し、約10%にして1回塗布する。Example 1. (1) The concentration of chloroprene adhesive (Cemedine 570 (made by Cemedine)) was adjusted to about 10% on the surface of an open-cell sponge made of natural rubber having an outer diameter of 24 mm and an apparent specific gravity of 0.25 by using an organic solvent. Apply once.
【0015】(2)下記表1の、硬さがJISA72の
加硫ゴムを粉砕し、粒子の大きさを0.7〜1.0mm
に調整したゴム粒子を全体に付着させ乾燥する。(2) Vulcanized rubber having a hardness of JIS A72 shown in Table 1 below is crushed to a particle size of 0.7 to 1.0 mm.
The rubber particles adjusted in step 1 are attached to the whole and dried.
【0016】(3)その上に上記(1)で用いた接着剤
を2回塗布し、乾燥する。(3) The adhesive used in (1) above is applied twice thereto and dried.
【0017】(4)100℃30分加熱処理を行う。(4) Heat treatment is performed at 100 ° C. for 30 minutes.
【0018】(1)〜(4)の工程を経た洗浄ボール
は、ボール内へ水の浸透も良かった。これを外径25.
4mm、長さ2mの銅合金管の内壁を鉄被覆した伝熱管
を洗浄ボールが水と共に流れる装置(図4)に組み入
れ、洗浄ボール3個を2m/secの速さで30時間連
続して通過させる試験を繰返し実施した。鉄保護被膜の
摩耗状況を観察し表4に示した。The cleaning balls that had undergone the steps (1) to (4) had good water permeation into the balls. This has an outer diameter of 25.
A heat transfer tube with an inner wall of a copper alloy tube of 4 mm and a length of 2 m coated with iron was installed in a device (Fig. 4) in which cleaning balls flow with water, and three cleaning balls are passed continuously at a speed of 2 m / sec for 30 hours. The test was repeated. The state of wear of the iron protective coating was observed and is shown in Table 4.
【0019】[0019]
【表1】 [Table 1]
【0020】実施例2.粒状研磨材を、下記表2の、硬
さがJISA85、ゴム粒子の大きさ1.0〜1.5m
mとし実施例1と同様に試験を行い、その結果を表4に
示した。Example 2. The granular abrasive material has a hardness of JISA85 shown in Table 2 below and a rubber particle size of 1.0 to 1.5 m.
The test was conducted in the same manner as in Example 1 with m as the result, and the results are shown in Table 4.
【0021】[0021]
【表2】 [Table 2]
【0022】比較例1.粒状研磨材を、下記表3の、硬
さがJISA95、ゴム粒子の大きさ0.7〜1.0m
mとし、実施例1と同様に試験を行い、その結果を表4
に示した。Comparative Example 1. The granular abrasives shown in Table 3 below have a hardness of JISA95 and a rubber particle size of 0.7 to 1.0 m.
m, the test was conducted in the same manner as in Example 1, and the results are shown in Table 4.
It was shown to.
【0023】[0023]
【表3】 [Table 3]
【0024】比較例2.粒状研磨材を、硬さがJISA
98以上、粒子の大きさが0.7〜1.0mmの合成樹
脂(パンライト:帝人)とし、実施例1と同様に試験を
行い、その結果を表4に示した。Comparative Example 2. Granular abrasives with hardness JIS A
A synthetic resin (Panlite: Teijin) having a particle size of 98 or more and a particle size of 0.7 to 1.0 mm was used, and the same test as in Example 1 was conducted. The results are shown in Table 4.
【0025】比較例3.図3の粒状研磨材を表面に接着
していないスポンジゴムを用いて、実施例1と同様に試
験を行なった。Comparative Example 3. A test was conducted in the same manner as in Example 1 using a sponge rubber in which the granular abrasive material of FIG. 3 was not adhered to the surface.
【0026】[0026]
【表4】 [Table 4]
【0027】表4より、研磨材のない比較例3のスポン
ジゴム、実施例1及び2は、鉄保護被膜に削り取られた
跡は認められなかったが比較例1では削り跡が水の流れ
方向に沿ってついており、比較例2では同様に削り跡が
多数見られ、一部の伝熱管には銅合金の素地が露出して
いた。From Table 4, in the sponge rubber of Comparative Example 3 having no abrasive, Examples 1 and 2, no traces of scraping off on the iron protective coating were observed, but in Comparative Example 1, the scraping traces were in the water flow direction. Similarly, in Comparative Example 2, many shaving marks were observed, and the copper alloy substrate was exposed on some heat transfer tubes.
【0028】[0028]
【効果】銅合金材質よりなる管式熱交換器の伝熱管に対
し、本発明の洗浄ボールは、管内壁の鉄保護被膜を削り
取るなどの熱交換器の損傷を招くことなしに、スライム
を削り落とすことができ、効率の優れた洗浄の実施によ
り、熱交換効率の向上、装置の長寿命化を得ることがで
きるという効果がある。[Effect] For the heat transfer tube of the tube heat exchanger made of copper alloy material, the cleaning ball of the present invention scrapes slime without causing damage to the heat exchanger such as scraping off the iron protective coating on the inner wall of the tube. By carrying out the cleaning which can be dropped and is highly efficient, there is an effect that the heat exchange efficiency can be improved and the life of the device can be extended.
【図1】図1は本発明の洗浄ボールの断面図FIG. 1 is a sectional view of a cleaning ball of the present invention.
【図2】図2は本発明の表面部分の拡大図FIG. 2 is an enlarged view of a surface portion of the present invention.
【図3】図3は粒状研磨材をコーティングしていないス
ポンジゴムボールの断面図FIG. 3 is a sectional view of a sponge rubber ball not coated with a granular abrasive.
【図4】図4は伝熱管の摩耗装置を示すFIG. 4 shows a heat transfer tube wear device.
【符号の説明】 1…スポンジゴムボール 2…ゴム粒子 3…接着剤 4…伝熱管 5…循環ポンプ 6…ボール回収器[Explanation of Codes] 1 ... Sponge rubber ball 2 ... Rubber particles 3 ... Adhesive 4 ... Heat transfer tube 5 ... Circulation pump 6 ... Ball collector
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐々木 卓也 神奈川県横須賀市船越町1丁目284番地の 5 日立機械エンジニアリング株式会社内 (72)発明者 今 英樹 神奈川県横須賀市船越町1丁目284番地の 5 日立機械エンジニアリング株式会社内 (72)発明者 福留 進 神奈川県横須賀市船越町1丁目284番地の 5 日立機械エンジニアリング株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takuya Sasaki 1-284, Funacoshi-cho, Yokosuka City, Kanagawa 5 Hitachi Mechanical Engineering Co., Ltd. (72) Inventor Hideki Ima, 1-284, Funakoshi-cho, Yokosuka City, Kanagawa Prefecture 5 In Hitachi Machinery Engineering Co., Ltd. (72) Inventor Susumu Fukudome 5 in Hitachi Machinery Engineering Co., Ltd. 1-284, Funakoshi-cho, Yokosuka City, Kanagawa Prefecture
Claims (1)
その管内面に接触しながら通過可能な軟らかさを有する
連続気泡のスポンジゴム球体と、このスポンジゴム球体
の表面に接着された粒状研磨材とからなる洗浄ボールで
あって、上記粒状研磨材はJISA50〜90の硬さを
有し、かつこれが接着された球体の表面を凹凸状にする
粒径を有することを特徴とする洗浄ボール。1. An open-celled sponge rubber sphere having a softness so that it can pass through a heat transfer tube of a tubular heat exchanger while being in contact with the inner surface of the tube by a water flow, and a granular material adhered to the surface of the sponge rubber sphere. A cleaning ball comprising an abrasive, wherein the granular abrasive has a hardness of JISA 50 to 90 and a particle size that makes the surface of a sphere to which it is adhered uneven. ..
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7964292A JPH05280889A (en) | 1992-04-01 | 1992-04-01 | Cleaning ball |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7964292A JPH05280889A (en) | 1992-04-01 | 1992-04-01 | Cleaning ball |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05280889A true JPH05280889A (en) | 1993-10-29 |
Family
ID=13695761
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7964292A Pending JPH05280889A (en) | 1992-04-01 | 1992-04-01 | Cleaning ball |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05280889A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012037106A (en) * | 2010-08-05 | 2012-02-23 | Kawasaki Heavy Ind Ltd | Cleaning method and device for heat transfer tube in marine boiler |
CN102921682A (en) * | 2012-11-08 | 2013-02-13 | 清华大学 | Washing descaling ball with mesh surface |
CN104511845A (en) * | 2013-09-27 | 2015-04-15 | 中国石油天然气股份有限公司 | Elastic polishing sand ball and using method thereof |
JP5856327B1 (en) * | 2015-03-16 | 2016-02-09 | フロンティアテクノロジー株式会社 | Water treatment agent and water treatment method |
CN110207534A (en) * | 2019-07-09 | 2019-09-06 | 深圳市勤达富流体机电设备有限公司 | A kind of rotating wash bowl of the surface with bristle |
WO2021157226A1 (en) * | 2020-02-07 | 2021-08-12 | 株式会社ミズキ | Cleaning ball and method for manufacturing same |
-
1992
- 1992-04-01 JP JP7964292A patent/JPH05280889A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012037106A (en) * | 2010-08-05 | 2012-02-23 | Kawasaki Heavy Ind Ltd | Cleaning method and device for heat transfer tube in marine boiler |
CN102921682A (en) * | 2012-11-08 | 2013-02-13 | 清华大学 | Washing descaling ball with mesh surface |
CN102921682B (en) * | 2012-11-08 | 2015-04-15 | 清华大学 | Washing descaling ball with mesh surface |
CN104511845A (en) * | 2013-09-27 | 2015-04-15 | 中国石油天然气股份有限公司 | Elastic polishing sand ball and using method thereof |
JP5856327B1 (en) * | 2015-03-16 | 2016-02-09 | フロンティアテクノロジー株式会社 | Water treatment agent and water treatment method |
CN110207534A (en) * | 2019-07-09 | 2019-09-06 | 深圳市勤达富流体机电设备有限公司 | A kind of rotating wash bowl of the surface with bristle |
WO2021157226A1 (en) * | 2020-02-07 | 2021-08-12 | 株式会社ミズキ | Cleaning ball and method for manufacturing same |
US11988472B2 (en) | 2020-02-07 | 2024-05-21 | Mizuki Co., Ltd. | Cleaning ball and method for manufacturing same |
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