JPH0790227B2 - Slime peeling method - Google Patents
Slime peeling methodInfo
- Publication number
- JPH0790227B2 JPH0790227B2 JP24153386A JP24153386A JPH0790227B2 JP H0790227 B2 JPH0790227 B2 JP H0790227B2 JP 24153386 A JP24153386 A JP 24153386A JP 24153386 A JP24153386 A JP 24153386A JP H0790227 B2 JPH0790227 B2 JP H0790227B2
- Authority
- JP
- Japan
- Prior art keywords
- slime
- hydrogen peroxide
- organic
- perhydrogen
- acid
- 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.)
- Expired - Fee Related
Links
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は淡水まは海水を使用する用水系、例えば熱交換
器、冷却器、凝縮器等に付着したスライムを剥離する方
法に関し、更に詳細には、過酸化水素（以下、過水と略
記する）または、水溶液中で過水を遊離する無機、有機
の過水付加物（以下、過水遊離物と略記する）と有機過
酸化物とを用水中に添加することによるスライム再付着
防止効果を有するスライム剥離方法に関するものであ
る。Description: TECHNICAL FIELD The present invention relates to a method for removing slime adhering to a water system using fresh water or seawater, for example, a heat exchanger, a cooler, a condenser, etc. Water, hydrogen peroxide (hereinafter abbreviated as "perhydrogen"), or an inorganic or organic perhydrogen adduct (hereinafter abbreviated as "hydrogen peroxide free") and an organic peroxide that liberate perhydrogen in an aqueous solution. The present invention relates to a slime peeling method having a slime redeposition preventing effect by adding it to the inside.
従来の技術 淡水または海水を使用する熱交換器、冷却器等にはしば
しばスライムが付着し、管を閉そくしたり、冷却効果を
低下させる。更には、製紙パルプ工場においては、発生
したスライムが製紙製造工程中に剥離し、紙質の低下等
の原因になっている。スライムは水中に生存する各種の
微生物、水酸化鉄、ケイ酸塩等の無機物、藻類などが渾
然一体となつて付着するものである。従来これらスライ
ムを剥離するためには、機械的手段あるいは過水、過酸
化ナトリウム、有機酸、無機酸、界面活性剤等を単独あ
るいは２種以上添加して化学的、物理的に剥離する方法
が知られている。2. Description of the Related Art Slime often adheres to heat exchangers, coolers, etc. that use fresh water or seawater, clogging the pipes and reducing the cooling effect. Further, in a paper pulp mill, the slime generated is peeled off during the paper manufacturing process, which causes deterioration of paper quality. Various kinds of microorganisms that survive in water, iron hydroxide, inorganic substances such as silicates, and algae adhere to slime as a whole. Conventionally, in order to remove these slimes, a mechanical method or a method of chemically or physically exfoliating by adding hydrogen peroxide, sodium peroxide, organic acid, inorganic acid, surfactant or the like alone or in combination of two or more kinds. Are known.
また用水中の微生物の増殖を防止するために、従来、塩
素、次亜塩素酸塩、亜塩素酸塩、塩素酸塩、ジクロロイ
ソシアヌル酸塩、過水および過水を放出する物質（過ホ
ウ酸塩、過炭酸塩などの無機過酸塩、または過酢酸のよ
うな有機過酸もしくはその塩）等が知られている。Also, in order to prevent the growth of microorganisms in the water, conventionally, chlorine, hypochlorite, chlorite, chlorate, dichloroisocyanurate, perhydrogen and substances that release perhydrogen (perboric acid Inorganic persalts such as salts and percarbonates, or organic peracids such as peracetic acid or salts thereof) are known.
発明が解決しようとしている問題点 従来の機械的手段によるスライムの剥離方法は装置の運
転を中止して行わなければならず、長時間を要し、また
スライムを完全に除去することは非常に困難である。ま
た薬剤を使用する化学的方法もスライムの剥離が不完全
である。いずれの方法もある程度のスライムの剥離はで
きるものの、残留したスライムが２、３週間のうちに再
び増殖し、再度のスライムの剥離作業が必要になるとい
う欠点がある。このため、再度の剥離作業あるいは、前
記したような薬剤を常時又は間欠的に添加しスライムの
増殖を押える等の手段が必要になる。Problems to be Solved by the Invention The conventional method for removing slime by mechanical means requires stopping the operation of the apparatus, takes a long time, and it is very difficult to completely remove slime. Is. In addition, chemical methods using chemicals also result in incomplete stripping of slime. Although any of the methods can remove slime to some extent, it has a drawback that residual slime grows again within a few weeks, and the work of removing slime again is required. For this reason, it is necessary to carry out a peeling operation again or a means for suppressing the growth of slime by constantly or intermittently adding the above-mentioned chemicals.
問題点を解決するための手段 本発明者等は１回のスライム剥離作業でスライムを完全
に剥離し、少なくとも数か月間スライムの再付着を防止
する方法を提供することを目的に検討を重ねた結果、本
発明を完成した。Means for Solving the Problems The inventors of the present invention have conducted extensive studies for the purpose of providing a method for completely removing slime by a single slime removing operation and preventing redeposition of slime for at least several months. As a result, the present invention has been completed.
即ち、本発明は有機過酸化物と過水又は過水遊離物を同
時に用水中に添加しスライムを剥離除去し、しかも少な
くとも数か月間スライムの再付着を防止する方法に関す
るものである。That is, the present invention relates to a method for simultaneously removing an organic peroxide and perhydrogen or a perhydrogen free product into water for exfoliating and removing slime, and for preventing re-deposition of slime for at least several months.
従来から過水を使用する方法は知られているが、本発明
のように過水と有機過酸化物を併用する方法は開示され
ていない。ここで使用する過水は一般に使用されている
工業用過水でよく、その使用濃度は特に限定されない
が、通常100〜10000ppmである。仮睡遊離物は、有機、
無機過水付加物である炭酸ナトリウム過水付加物、トリ
ポリリン酸ナトリウム過水付加物、ピロリン酸ナトリウ
ム過水付加物、尿素過水付加物、硫酸ナトリウム一塩化
ナトリウム複塩過水付加物、メラミン過水付加物、過ホ
ウ酸ナトリウム一水塩、過ホウ酸ナトリウム四水塩、過
酸化ナトリウム、過酸化カルシウム等の無機過酸化物で
ある。Conventionally, a method of using perhydrogen is known, but a method of using perhydrogen and an organic peroxide in combination as in the present invention is not disclosed. The hydrogen peroxide used here may be industrially used hydrogen peroxide generally used, and the concentration used is not particularly limited, but is usually 100 to 10,000 ppm. Nap free products are organic,
Inorganic hydrogen peroxide adduct, sodium carbonate hydrogen peroxide adduct, sodium tripolyphosphate hydrogen peroxide adduct, sodium pyrophosphate hydrogen peroxide adduct, urea hydrogen peroxide adduct, sodium sulfate sodium monochloride double salt hydrogen peroxide adduct, melamine hydrogen peroxide adduct. It is an inorganic peroxide such as a water adduct, sodium perborate monohydrate, sodium perborate tetrahydrate, sodium peroxide and calcium peroxide.
これら過水遊離物の濃度は特に限定しないが、遊離過水
濃度に換算して100〜10000ppmでよい。又、更にこれら
と組ま合わせて使用する有機過酸化物としては、特に有
機過酸あるいは有機過酸のアルカリ金属塩あるいはアル
カリ土類金属塩が良い。有機過酸としては過ギ酸、過酢
酸、過プロピオン酸、過ブチル酸、過カプリン酸、過ラ
ウリン酸、過安息香酸、モノ過フタル酸、ジ過フタル
酸、ドデカンジカルボン酸、或いはそれらのアルカリ金
属塩、アルカリ土類金属塩等で例示される。これら過酸
化物の添加量は特に限定されないが、100〜10000ppmが
よい。The concentration of these free hydrogen peroxide products is not particularly limited, but may be 100 to 10,000 ppm in terms of the free hydrogen peroxide concentration. Further, as the organic peroxide to be used in combination with these, an organic peracid or an alkali metal salt or alkaline earth metal salt of an organic peracid is particularly preferable. Organic peracids include formic acid, peracetic acid, perpropionic acid, perbutyric acid, percapric acid, perlauric acid, perbenzoic acid, monoperphthalic acid, diperphthalic acid, dodecanedicarboxylic acid, or their alkali metals. Examples thereof include salts and alkaline earth metal salts. The addition amount of these peroxides is not particularly limited, but is preferably 100 to 10,000 ppm.
作用 過水単独に於けるスライム剥離機構は、スライム中に存
在するゼラチン性の有機物が、過水に作用して過水を分
解し、生じた発生機の酸素によりゼラチン状有機物が酸
化分解されて粘着力を失い、同時にスライム中における
発泡作用がスライムを剥離分散すると考えられている。
（特公昭42−16521号） ところで、本発明の作用機構については、明らかではな
いが、用水中に添加された過水および有機過酸化物のう
ち、強い酸化力および殺菌力を有する有機過酸化物が、
最初、スライムを攻撃し、スライムの粘着性を一部失わ
せしめると同時に、もう一つの薬剤である過水が、スラ
イム内部までくまなく侵入できるようにスライムを変性
せしめ、ここに過水が侵入し、スライムの粘着性を完全
に失わせるとともに、過水の分解によつて生じる気泡が
スライムを浮上、剥離するものと推察される。つまり、
有機過酸化物は、もう一方の薬剤である過水がスライム
に作用しやすい雰囲気を形成させるものと考えられる。Action The slime peeling mechanism in perhydrogen alone is that the gelatinous organic matter present in the slime acts on the perhydrogen to decompose the perhydrogen, and the generated oxygen is oxidatively decomposed the gelatinous organic matter. It is believed that the adhesive strength is lost and, at the same time, the foaming action in the slime exfoliates and disperses the slime.
By the way, although the mechanism of action of the present invention is not clear, among the peroxides and organic peroxides added to the water, organic peroxides having a strong oxidizing power and bactericidal power are disclosed. Thing is,
At first, attack the slime and make the slime partly lose its stickiness, and at the same time, another agent, perhydrogen, modifies the slime so that it can penetrate all the way inside the slime, where it enters. It is speculated that the slime's tackiness is completely lost, and the air bubbles generated by the decomposition of the excess water float on the slime and peel it off. That is,
It is considered that the organic peroxide forms an atmosphere in which the other chemical, perhydrogen, easily acts on slime.
効果 本発明によれば、用水系に発生したスライムを完全に剥
離することができることは勿論、従来法のように、スラ
イムが残留することがないので、本発明により、一度、
スライム剥離作業を行えば、少なくとも数か月間にわた
つてスライムの再付着を防止することができるものであ
る。Effects According to the present invention, it is possible to completely remove the slime generated in the water system, and since slime does not remain as in the conventional method, according to the present invention, once,
If slime peeling work is performed, redeposition of slime can be prevented for at least several months.
尚、本発明の比較例に示される如く、有機過酸化物は、
単独ではスライム剥離作用はほとんどなく、過水と併用
して予期せぬ相乗効果を発揮するものとなる。Incidentally, as shown in Comparative Examples of the present invention, the organic peroxide is
When used alone, it has almost no slime-stripping action, and when used in combination with superfluid, it exhibits an unexpected synergistic effect.
実施例 以下に実施例により本発明を具体的に示す。Examples The present invention will be specifically described below with reference to Examples.
実施例１ スライムの発生した冷却水系に約50センチ角の板切を約
１か月間つるして板全面にスライムを発生させた。この
冷却水に過水5000ppm、過酢酸5000ppmを添加して20分間
冷却水を循環させた後、この板切を取り出して観察し
た。冷却水は全て排出し、新水を入れてこれに前の板切
をつるした後、３か月間冷却機を運転した。再び板切を
取り出して観察した。スライムの剥離状態及びスライム
の再付着状態は下記の表に示す通りである。Example 1 A 50 cm square plate was hung in the cooling water system in which slime was generated for about 1 month to generate slime on the entire surface of the plate. After adding 5000 ppm of perhydrogen and 5000 ppm of peracetic acid to the cooling water and circulating the cooling water for 20 minutes, the plate was taken out and observed. After all the cooling water was discharged, fresh water was added and the previous plate cutting was suspended, and then the cooling machine was operated for 3 months. The plate was taken out again and observed. The state of peeling slime and the state of redeposition of slime are as shown in the table below.
なお、比較例として同条件で過酸化水素10000ppmだけを
冷却水に添加した場合および過酢酸10000ppmだけを冷却
水中に添加した場合の試験結果を併記する。As comparative examples, the test results when only 10000 ppm of hydrogen peroxide was added to the cooling water under the same conditions and when only 10000 ppm of peracetic acid was added to the cooling water are also shown.
フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０２Ｆ 1/72 ＺＡＢ Ｚ Continuation of the front page (51) Int.Cl. 6 Identification number Office reference number FI technical display location C02F 1/72 ZAB Z
Claims (1)
遊離する無機、有機の過酸化水素付加物と有機過酸化物
とを用水中に添加することによるスライム再付着防止効
果を有するスライム剥離方法。1. A slime peeling agent having a slime redeposition preventing effect by adding hydrogen peroxide or an inorganic or organic hydrogen peroxide adduct that releases hydrogen peroxide in an aqueous solution and an organic peroxide to water. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24153386A JPH0790227B2 (en) | 1986-10-13 | 1986-10-13 | Slime peeling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24153386A JPH0790227B2 (en) | 1986-10-13 | 1986-10-13 | Slime peeling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6397288A JPS6397288A (en) | 1988-04-27 |
| JPH0790227B2 true JPH0790227B2 (en) | 1995-10-04 |
Family
ID=17075765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24153386A Expired - Fee Related JPH0790227B2 (en) | 1986-10-13 | 1986-10-13 | Slime peeling method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0790227B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL9300445A (en) * | 1993-03-12 | 1994-10-03 | Kemira Peroxides Bv | Method for disinfecting water, such as "drain water" in horticulture, as well as a device to be used therewith. |
| IT1271141B (en) * | 1993-07-29 | 1997-05-27 | Promox S R L | PROCEDURE FOR THE POTABILIZATION OF WATER INTENDED FOR HUMAN CONSUMPTION |
| DE19856071A1 (en) * | 1998-12-04 | 2000-06-15 | Degussa | Process for avoiding water contamination with non-resident organisms |
-
1986
- 1986-10-13 JP JP24153386A patent/JPH0790227B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6397288A (en) | 1988-04-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |