JP2003267811A - Slime release agent, slime release agent composition and slime release method - Google Patents
Slime release agent, slime release agent composition and slime release methodInfo
- Publication number
- JP2003267811A JP2003267811A JP2002070735A JP2002070735A JP2003267811A JP 2003267811 A JP2003267811 A JP 2003267811A JP 2002070735 A JP2002070735 A JP 2002070735A JP 2002070735 A JP2002070735 A JP 2002070735A JP 2003267811 A JP2003267811 A JP 2003267811A
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- Japan
- Prior art keywords
- slime
- chlorine
- release agent
- agent
- stripping
- 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.)
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- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
(57)【要約】
【課題】 水系において、スライムの剥離効果に優れ、
しかも安全性が高く、かつ低腐食性であるスライム剥離
剤およびスライム剥離方法を提供する。
【解決手段】 塩素系酸化剤と、スルファミン酸および
／またはその塩とを含有するスライム剥離剤を水系に添
加し、スライムを剥離する。(57) [Abstract] [Problem] In water system, excellent slime peeling effect,
Moreover, the present invention provides a slime release agent and a slime release method that are highly safe and low in corrosion. SOLUTION: A slime remover containing a chlorine-based oxidizing agent and sulfamic acid and / or a salt thereof is added to an aqueous system to remove slime.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、水系においてスラ
イムを剥離するスライム剥離剤、スライム剥離剤組成物
およびスライム剥離方法に関するものである。TECHNICAL FIELD The present invention relates to a slime release agent for removing slime in an aqueous system, a slime release agent composition, and a slime release method.
【０００２】[0002]
【従来の技術】各種工場のプラント冷却水系、紙パルプ
水系、廃水処理水系、鉄鋼水系、切削油水系などでは、
細菌、糸状菌、藻類などから構成されるスライムが系内
に発生し、熱効率の低下、通水配管の閉塞、配管金属材
質の腐食などのスライム障害を引き起こす原因となる。2. Description of the Related Art For plant cooling water systems, paper pulp water systems, wastewater treatment water systems, steel water systems, cutting oil water systems, etc. of various plants,
Slime, which is composed of bacteria, filamentous fungi, and algae, is generated in the system, and causes slime problems such as reduction in thermal efficiency, blockage of water passage pipes, and corrosion of pipe metal materials.
【０００３】このようなスライム障害を回避する方法と
して、薬剤を用いる方法が知られている。薬剤として
は、付着したスライムを剥離ないし洗浄するスライム剥
離剤または洗浄剤、あるいはスライムの付着を防止する
スライムコントロール剤または殺菌剤などが使用されて
いる。As a method for avoiding such slime disorders, a method using a drug is known. As the chemical, a slime remover or cleaning agent that removes or cleans adhered slime, or a slime control agent or a bactericide that prevents adhesion of slime is used.
【０００４】これらの薬剤の中で、スライムコントロー
ル剤または殺菌剤は、水中の微生物濃度を低く保つこと
により、スライムの付着ポテンシャルを低減させてい
る。一般的にはスライムコントロール剤は、菌の酵素反
応の阻害、細胞膜の変性作用により、殺菌または細菌の
増殖を抑制し、一方スライム剥離剤は、主に菌体外の粘
着物質（一般的には多糖類）の粘性を低下させることに
より、細菌の集合体を分散させ、付着面よりスライムを
剥離する。従って、スライムコントロール剤として有効
な薬剤であっても、スライム剥離剤としては有効で無い
もの、またスライム剥離剤として有効であっても、スラ
イムコントロール剤として有効でない場合がある。Among these agents, slime control agents or bactericides reduce the adhesion potential of slime by keeping the concentration of microorganisms in water low. Generally, slime control agents inhibit sterilization or bacterial growth by inhibiting enzyme reaction of bacteria and denaturing action of cell membranes, while slime peeling agents are mainly used for adhesion substances outside the cells (generally, By reducing the viscosity of (polysaccharide), bacterial aggregates are dispersed, and slime is peeled off from the adhered surface. Therefore, there are cases where even a drug effective as a slime control agent is not effective as a slime release agent, and an agent effective as a slime release agent is not effective as a slime control agent.
【０００５】従来、スライム剥離剤またはスライム洗浄
剤としては、ヒドラジンが広く使用されている。しか
し、ヒドラジンは有毒で発癌性などの問題があり、安全
性の面から代替品の出現が望まれている。また、次亜塩
素酸ナトリウムや過酸化水素などの無機酸化剤について
も、スライム剥離効果が認められるものの、スライム剥
離効果が認められる濃度で使用すると、配管や熱交換器
の金属材質の腐食を引き起こすため、実用上使用は困難
である。Conventionally, hydrazine has been widely used as a slime remover or a slime cleaner. However, hydrazine is toxic and has problems such as carcinogenicity, and therefore the emergence of a substitute is desired from the viewpoint of safety. Also, with inorganic oxidizers such as sodium hypochlorite and hydrogen peroxide, the slime peeling effect is recognized, but when used at a concentration where the slime peeling effect is recognized, corrosion of metal materials of pipes and heat exchangers is caused. Therefore, it is practically difficult to use.
【０００６】ところで、塩素系酸化剤、スルファミン酸
および／またはその塩には水中生物に対する殺菌効果が
あることを示す報告（特公告４１−１５１１６号）は存
在するが、スライム剥離効果があることは知られていな
い。By the way, there is a report (Japanese Patent Publication No. 41-15116) showing that the chlorine-based oxidant, sulfamic acid and / or its salt has a bactericidal effect on aquatic organisms, but it has no slime exfoliating effect. unknown.
【０００７】[0007]
【発明が解決しようとする課題】本発明の課題は、上記
従来の問題点を解決するため、スライム剥離効果に優
れ、しかも安全性が高く、かつ低腐食性のスライム剥離
剤およびスライム剥離剤組成物を提供することである。
本発明の他の課題は、スライム剥離効果に優れ、しかも
安全性が高く、かつ低腐食性のスライム剥離方法を提案
することである。SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems of the prior art by providing a slime remover and a slime remover composition having excellent slime removing effect, high safety and low corrosiveness. It is to provide things.
Another object of the present invention is to propose a slime stripping method that is excellent in slime stripping effect, highly safe, and low in corrosiveness.
【０００８】[0008]
【課題を解決するための手段】本発明は、上記課題を達
成するために鋭意研究を進めた結果、菌体外の多糖類の
粘性を低下させる作用を有し、スライム剥離効果を発揮
するスライム剥離剤として、塩素系酸化剤と、スルファ
ミン酸および／またはその塩との併用が、極めて有効で
あることを見出した。Means for Solving the Problems The present invention, as a result of intensive research aimed at achieving the above objects, has the effect of lowering the viscosity of polysaccharides outside the cells and exerts a slime-stripping effect. It has been found that the combined use of a chlorine-based oxidizing agent and sulfamic acid and / or its salt as a stripping agent is extremely effective.
【０００９】すなわち本発明は、以下のスライム剥離
剤、スライム剥離剤組成物およびスライム剥離方法であ
る。
（１）塩素系酸化剤と、スルファミン酸および／または
その塩とを含有するスライム剥離剤。
（２）塩素系酸化剤が次亜塩素酸またはその塩である上
記（１）記載のスライム剥離剤。
（３）塩素系酸化剤が次亜塩素酸ナトリウムである上記
（１）記載のスライム剥離剤。
（４）塩素系酸化剤の有効塩素と、スルファミン酸およ
び／またはその塩とのモル比が２：１〜１：５である上
記（１）ないし（３）のいずれかに記載のスライム剥離
剤。
（５）上記（１）ないし（４）のいずれかに記載のスラ
イム剥離剤を含むスライム剥離剤組成物。
（６）水系に、上記（１）ないし（５）のいずれかに記
載のスライム剥離剤またはスライム剥離剤組成物を添加
して、スライムを剥離するスライム剥離方法。
（７）水系への塩素系酸化剤の添加量が、水系中の有効
塩素濃度として０．１〜１０００ｍｇ／Ｌである上記
（６）に記載のスライム剥離方法。That is, the present invention is the following slime release agent, slime release agent composition and slime release method. (1) A slime remover containing a chlorine-based oxidizing agent and sulfamic acid and / or a salt thereof. (2) The slime remover according to (1) above, wherein the chlorine-based oxidizing agent is hypochlorous acid or a salt thereof. (3) The slime release agent as described in (1) above, wherein the chlorine-based oxidizing agent is sodium hypochlorite. (4) The slime stripping agent according to any one of (1) to (3) above, wherein the effective chlorine of the chlorine-based oxidizing agent and the sulfamic acid and / or its salt have a molar ratio of 2: 1 to 1: 5. . (5) A slime release agent composition containing the slime release agent according to any one of (1) to (4) above. (6) A slime peeling method for peeling slime by adding the slime peeling agent or the slime peeling agent composition according to any one of (1) to (5) to an aqueous system. (7) The slime stripping method as described in (6) above, wherein the amount of chlorine-based oxidizing agent added to the water system is 0.1 to 1000 mg / L as the effective chlorine concentration in the water system.
【００１０】本発明に用いられる塩素系酸化剤は、塩素
系の酸化剤であれば特に限定されるものではないが、コ
スト、取扱性、安全性、水に対する溶解度などの面か
ら、好ましくは次亜塩素酸またはその塩、さらに好まし
くは次亜塩素酸ナトリウムである。次亜塩素酸ナトリウ
ムは、工業薬品として一般に流通している１２％次亜塩
素酸ナトリウムを用いることができる。The chlorine-based oxidizing agent used in the present invention is not particularly limited as long as it is a chlorine-based oxidizing agent, but from the viewpoints of cost, handleability, safety, solubility in water, etc., it is preferably Chlorous acid or a salt thereof, more preferably sodium hypochlorite. As the sodium hypochlorite, 12% sodium hypochlorite which is generally distributed as an industrial chemical can be used.
【００１１】本発明に用いられるスルファミン酸または
その塩は、特に限定されるものではない。例えば、スル
ファミン酸、スルファミン酸アンモニウム等を用いるこ
とができる。スルファミン酸はヒドラジンのように有毒
ではなく、安全性が高い。The sulfamic acid or salt thereof used in the present invention is not particularly limited. For example, sulfamic acid, ammonium sulfamate, or the like can be used. Sulfamic acid is not as toxic as hydrazine and is highly safe.
【００１２】本発明のスライム剥離剤において、塩素系
酸化剤の有効塩素と、スルファミン酸および／またはそ
の塩の含有割合は、モル比で（塩素系酸化剤の有効塩
素）：（スルファミン酸および／またはその塩）が２：
１〜１：５、好ましくは２：１〜１：２であるのが望ま
しい。ここで、塩素系酸化剤の有効塩素とはＪＩＳ Ｋ
０１０１に準拠した残留塩素測定方法によって測定され
る塩素である。本発明のスライム剥離剤は予め塩素系酸
化剤と、スルファミン酸および／またはその塩とを配合
して一製剤として調製しておくこともできるし、使用す
る際に塩素系酸化剤と、スルファミン酸および／または
その塩とを別々に二製剤として添加することもできる。In the slime remover of the present invention, the effective chlorine content of the chlorine-based oxidizer and the content ratio of sulfamic acid and / or a salt thereof are in terms of molar ratio (effective chlorine content of the chlorine-based oxidizer): (sulfamic acid and / or Or its salt) is 2:
It is desirable that the ratio is 1 to 1: 5, preferably 2: 1 to 1: 2. Here, the available chlorine of chlorine-based oxidizer is JIS K
It is chlorine measured by the residual chlorine measuring method based on 0101. The slime remover of the present invention can be prepared in advance by mixing a chlorine-based oxidizing agent and sulfamic acid and / or a salt thereof as a preparation, and when used, the chlorine-based oxidizing agent and sulfamic acid are used. And / or its salt can also be added separately as two formulations.
【００１３】本発明のスライム剥離剤組成物は、本発明
のスライム剥離剤が配合されており、使用形態に応じて
液剤、粒剤、紛剤、その他公知の形態としたスライム剥
離剤組成物である。また、一製剤とする場合には、水酸
化ナトリウムや水酸化カリウム等のアルカリを配合する
ことにより、より保存安定性の良好なスライム剥離剤組
成物とすることができる。さらに必要に応じて、殺生物
剤、増殖抑制剤、腐食防止剤、銅用防食剤、スケール防
止剤、消泡剤、界面活性剤などを配合することができ
る。The slime release agent composition of the present invention contains the slime release agent of the present invention, and is a liquid agent, granule, powder or other known slime release agent composition depending on the use form. is there. Further, in the case of one preparation, by adding an alkali such as sodium hydroxide or potassium hydroxide, a slime release agent composition having better storage stability can be obtained. Further, if necessary, a biocide, a growth inhibitor, a corrosion inhibitor, a copper anticorrosive, a scale inhibitor, an antifoaming agent, a surfactant and the like can be added.
【００１４】本発明のスライム剥離方法は、前記本発明
のスライム剥離剤またはスライム剥離剤組成物を水系に
添加してスライムを剥離する方法である。スライム剥離
剤またはスライム剥離剤組成物は、予め全ての成分を混
合したものを、処理対象となる水系に添加してもよい
し、別々に水系に添加してもよい。処理対象となる水系
としては、スライムが発生する水系であれば特に限定さ
れず、例えば、各種工場のプラント冷却水系、スクラバ
ー、紙パルプ水系、廃水処理水系、排水処理水系、鉄鋼
水系、切削油水系などが挙げられ、これらの装置、通水
配管などに付着したスライムを剥離することができる。The slime stripping method of the present invention is a method of stripping slime by adding the slime stripping agent or the slime stripping agent composition of the present invention to an aqueous system. The slime remover or the slime remover composition may be prepared by mixing all the components in advance, and may be added to the water system to be treated or separately. The water system to be treated is not particularly limited as long as it produces water of slime, for example, plant cooling water system of various factories, scrubber, paper pulp water system, wastewater treatment water system, wastewater treatment water system, steel water system, cutting oil water system. The slime adhering to these devices, water supply pipes, etc. can be peeled off.
【００１５】水系に使用する場合のスライム剥離剤また
はスライム剥離剤組成物の添加量は、有効塩素濃度とし
て０．１〜１０００ｍｇ／Ｌ、好ましくは１〜２００ｍ
ｇ／Ｌであるのが望ましい。ここで、有効塩素濃度とは
ＪＩＳ Ｋ０１０１に準拠した残留塩素測定法によって
測定される塩素濃度である。有効塩素濃度が前記範囲に
ある場合、水系のｐＨが３〜１４程度の範囲で十分にス
ライムの剥離効果がある。When used in an aqueous system, the amount of the slime remover or slime remover composition added is 0.1 to 1000 mg / L, preferably 1 to 200 m, as an effective chlorine concentration.
It is preferably g / L. Here, the effective chlorine concentration is a chlorine concentration measured by a residual chlorine measuring method based on JIS K0101. When the effective chlorine concentration is within the above range, the slime removing effect is sufficiently obtained when the pH of the aqueous system is in the range of about 3 to 14.
【００１６】上記のようにしてスライム剥離処理を行う
ことにより、スライムを簡単に効率よく剥離することが
できる。By performing the slime stripping treatment as described above, the slime can be stripped easily and efficiently.
【００１７】[0017]
【発明の効果】本発明のスライム剥離剤およびスライム
剥離剤組成物は、塩素系酸化剤と、スルファミン酸およ
び／またはその塩とを含有するため、スライム剥離効果
に優れ、しかも安全性が高く、かつ低腐食性である。ま
た、本発明のスライム剥離方法は、塩素系酸化剤とスル
ファミン酸および／またはその塩とを含有するスライム
剥離剤またはスライム剥離剤組成物を使用してスライム
の剥離を行うため、スライムの剥離効果に優れ、しかも
安全性が高く、かつ低腐食性である。The slime remover and slime remover composition of the present invention contain a chlorine-based oxidizing agent and sulfamic acid and / or a salt thereof, and therefore have excellent slime removing effect and high safety. And it is low corrosive. Further, the slime stripping method of the present invention uses a slime stripping agent or a slime stripping agent composition containing a chlorine-based oxidizing agent and sulfamic acid and / or a salt thereof to strip slime. Excellent, high safety and low corrosiveness.
【００１８】[0018]
【発明の実施の形態】以下に実施例を挙げて本発明をさ
らに詳しく説明するが、本発明はこれらに限定されるも
のではない。BEST MODE FOR CARRYING OUT THE INVENTION The present invention is described in more detail below with reference to Examples, but the present invention is not limited thereto.
【００１９】実施例１
スライム剥離剤の剥離効果を検討した。厚木市水をバブ
リングして得られた脱塩素水１Ｌに、実際の工場の冷却
水系から採取した汚れ成分（菌体）を、１ｗ／ｗ％とな
るように添加して、スライム懸濁液を作成した。これ
に、スライム剥離剤（スルファミン酸１００ｇを水５０
０ｍＬに溶解し、それに５０％ＮａＯＨ溶液を１００ｍ
Ｌを加え、さらに１１．６％次亜塩素酸ナトリウム溶液
４００ｍＬを加えて調製したもの）をＪＩＳ Ｋ０１０
１に準拠した残留塩素測定法によって測定された有効塩
素濃度で２０ｍｇ／Ｌとなるように添加して２００ｒｐ
ｍで５分間処理したものと、何も添加していないスライ
ム懸濁液のみからなるのものを準備した。これらを４日
間室温下に放置した後に沈渣を取り出し、電子顕微鏡観
察を行った。Example 1 The stripping effect of a slime stripping agent was examined. Atsugi City To 1 liter of dechlorinated water obtained by bubbling water, soil components (bacteria) collected from the actual cooling water system of the factory were added at 1 w / w%, and the slime suspension was added. Created. Add a slime remover (sulfamic acid 100 g to water 50
Dissolve in 0 mL and add 50% NaOH solution to 100 m
L was added and 400 mL of a 11.6% sodium hypochlorite solution was further added) to JIS K010
200 rp by adding so that the effective chlorine concentration measured by the residual chlorine measuring method according to 1 becomes 20 mg / L.
m and the slime suspension without any addition were prepared. After leaving these for 4 days at room temperature, the precipitate was taken out and observed with an electron microscope.
【００２０】その結果、スライム剥離剤を添加していな
いものは、沈渣表面に角張った突起物や糸状物質が多数
見られたが、スライム剥離剤を添加したものは、表面の
突起物も丸みを帯びた状態に変わっており、さらに糸状
物質も消失していた。以上のことから、スライム剥離剤
はスライム剥離効果および表面改質効果に優れているこ
とが確認された。As a result, in the case where the slime release agent was not added, a large number of angular projections and thread-like substances were found on the surface of the sediment, but in the case where the slime release agent was added, the projections on the surface were rounded. It has changed to a tinged state and the filamentous material has also disappeared. From the above, it was confirmed that the slime release agent is excellent in the slime release effect and the surface modification effect.
【００２１】実施例２
スライム剥離剤の濃度による剥離効果を検討した。上水
５Ｌにポリペプトン２５．２ｇ、酵母エキス２５．２
ｇ、ＮａＣｌ１２．６ｇ、ＮａＯＨ３．２５ｇを溶解
し、オートクレーブ殺菌（１２１℃×１５分）してＰＹ
培地を調製した。このＰＹ培地（５ｍｇ−ＢＯＤ／Ｌ）
で培養した混合菌培養液を準備した。それを温度３０℃
で、内径３ｍｍのシリコンチューブに通水速度５．５ｍ
／ｓｅｃで通水し、４８時間スライムを付着させた。そ
の後、同条件で継続して通水しながら実施例１で調製し
たスライム剥離剤または過酸化水素（３５ｗ／ｗ％）を
表１の濃度で２４時間連続添加した後、スライムの付着
量を求めた。スライム付着量は、シリコンチューブ３０
ｃｍを切り取った後、内面に付着したスライムを掻きと
り、遠心分離して湿容量として求めた。この湿容量を基
に、各濃度におけるスライム剥離率を算出した。結果を
表１に示す。以上のことから、非常に低濃度においても
スライム剥離効果があることが確認された。Example 2 The stripping effect depending on the concentration of the slime stripping agent was examined. 25.2 g of polypeptone and 25.2 yeast extract in 5 L of clean water
g, 12.6 g of NaCl and 3.25 g of NaOH are dissolved and sterilized by autoclave (121 ° C x 15 minutes) and then PY
The medium was prepared. This PY medium (5 mg-BOD / L)
A mixed bacterial culture solution cultivated in 1. was prepared. Temperature it 30 ℃
The water flow rate is 5.5 m in a silicon tube with an inner diameter of 3 mm.
The water was passed through at a speed of / sec to attach slime for 48 hours. Thereafter, while continuously passing water under the same conditions, the slime remover prepared in Example 1 or hydrogen peroxide (35 w / w%) was continuously added at the concentration shown in Table 1 for 24 hours, and then the amount of adhered slime was calculated. It was Silicone tube 30
After cutting out cm, the slime adhering to the inner surface was scraped off and centrifuged to obtain the wet capacity. The slime peeling rate at each concentration was calculated based on this wet capacity. The results are shown in Table 1. From the above, it was confirmed that the slime peeling effect is obtained even at a very low concentration.
【００２２】[0022]
【表１】
＊１ 添加濃度：有効塩素濃度（ＪＩＳ Ｋ０１０１に
準拠した残留塩素測定法によって測定された濃度）また
は過酸化水素濃度
＊２ スライム剥離率：薬剤無添加のものに対する剥離
の割合[Table 1] * 1 Additive concentration: Effective chlorine concentration (concentration measured by residual chlorine measuring method based on JIS K0101) or hydrogen peroxide concentration * 2 Slime stripping ratio: Ratio of stripping to those without chemicals
【００２３】実施例３
１００冷凍トンの実開放循環冷却水水系を対象として、
適用試験を行った。試験は、実施例１で調製したスライ
ム剥離剤を、水系への対ブロー濃度で次亜塩素酸ナトリ
ウムが有効塩素濃度（ＪＩＳ Ｋ０１０１に準拠した残
留塩素測定法によって測定された濃度）として２ｍｇ／
Ｌとなるように連続添加して行い、添加する前の１週間
と添加後の１週間をモニタリングした。このとき、冷却
塔ピットに軟鋼（ＳＰＣＣ）テストピースおよび銅（Ｃ
１２２０Ｔ）テストピースを浸漬して、スライム剥離剤
の添加前と添加後の腐食速度を求めた。また、ポリプロ
ピレン製ラバーテストピースを浸漬して、スライム剥離
剤の添加前３日間と添加後３日間のスライム付着量を求
めた。Example 3 For an actual open circulation cooling water system of 100 refrigeration tons,
An application test was conducted. The test was carried out by using the slime release agent prepared in Example 1 as an effective chlorine concentration (concentration measured by the residual chlorine measuring method according to JIS K0101) of sodium hypochlorite in a concentration against blow to a water system.
It was continuously added so as to give L, and one week before the addition and one week after the addition were monitored. At this time, mild steel (SPCC) test piece and copper (C
1220T) The test piece was dipped and the corrosion rate before and after the addition of the slime release agent was determined. Further, a polypropylene rubber test piece was dipped and the amount of slime adhered for 3 days before and 3 days after the addition of the slime release agent was determined.
【００２４】その結果、添加前１週間の期間は充填材の
表面に茶褐色のスライムが付着していたが、スライム剥
離材添加１週間後にはほとんどのスライムは剥離して認
められなくなった。このとき、軟鋼（ＳＰＣＣ）テスト
ピースおよび銅（Ｃ１２２０Ｔ）テストピースの平均腐
食速度は、それぞれ５．２ｍｄｄ（ｍｇ／ｄｍ2・ｄａ
ｙ）、０．８ｍｄｄであった。また、ポリプロピレン製
ラバーテストピースに付着したスライムの付着量は、ス
ライム剥離剤添加前の２１．０ｍｇ／ｄｍ2から３．１
ｍｇ／ｄｍ2に低下した。以上のことから、スライム剥
離剤のスライム剥離効果および低腐食性が確認された。As a result, dark brown slime adhered to the surface of the filler for one week before the addition, but almost one week after the addition of the slime release material, almost all slime was peeled off and could not be recognized. At this time, the average corrosion rates of the mild steel (SPCC) test piece and the copper (C1220T) test piece were 5.2 mdd (mg / dm 2 · da), respectively.
y) and 0.8 mdd. Further, the amount of slime attached to the polypropylene rubber test piece is from 21.0 mg / dm 2 before adding the slime release agent to 3.1.
It dropped to mg / dm 2 . From the above, it was confirmed that the slime removing agent has a slime removing effect and low corrosiveness.
【００２５】実施例４
１００冷凍トンの実開放循環冷却水水系を対象として、
適用試験を行った。試験は、対保有水量当たり、１０％
スルファミン酸水溶液を３００ｍｇ／Ｌ、工業用次亜塩
素酸ナトリウム溶液（有効塩素濃度１２％）を３００ｍ
ｇ／Ｌとを別々にバッチ添加して行い、添加する前の１
週間と添加後の１週間をモニタリングした。このとき、
冷却塔ピットに軟鋼（ＳＰＣＣ）テストピースおよび銅
（Ｃ１２２０Ｔ）テストピースを浸漬して、スライム剥
離剤の添加前と添加後の腐食速度を求めた。また、ポリ
プロピレン製ラバーテストピースを浸漬して、スライム
剥離剤の添加前３日間と添加後３日間のスライム付着量
を求めた。Example 4 For 100 refrigeration tons of actual open circulating cooling water system,
An application test was conducted. The test is 10% per amount of water held
300 mg / L of sulfamic acid aqueous solution, 300 m of industrial sodium hypochlorite solution (effective chlorine concentration 12%)
g / L and batch addition separately, and before adding 1
Weeks and one week after addition were monitored. At this time,
A mild steel (SPCC) test piece and a copper (C1220T) test piece were immersed in a cooling tower pit to determine the corrosion rate before and after addition of the slime release agent. Further, a polypropylene rubber test piece was dipped and the amount of slime adhered for 3 days before and 3 days after the addition of the slime release agent was determined.
【００２６】その結果、添加前１週間の期間は充填材の
表面に茶褐色のスライムが付着していたが、スライム剥
離材添加１週間後にはほとんどのスライムは剥離して認
められなくなった。このとき、軟鋼（ＳＰＣＣ）テスト
ピースおよび銅（Ｃ１２２０Ｔ）テストピースの平均腐
食速度は、それぞれ６．６ｍｄｄ（ｍｇ／ｄｍ2・ｄａ
ｙ）、０．７ｍｄｄであった。また、ポリプロピレン製
ラバーテストピースに付着したスライムの付着量は、ス
ライム剥離剤添加前の１６．９ｍｇ／ｄｍ2から２．２
ｍｇ／ｄｍ2に低下した。以上のことから、スライム剥
離剤のスライム剥離効果および低腐食性が確認された。As a result, dark brown slime adhered to the surface of the filler for one week before the addition, but almost one week after the addition of the slime release material, almost all slime was peeled off and could not be recognized. At this time, the average corrosion rates of the mild steel (SPCC) test piece and the copper (C1220T) test piece were 6.6 mdd (mg / dm 2 · da), respectively.
y) and 0.7 mdd. The amount of slime attached to the polypropylene rubber test piece was from 16.9 mg / dm 2 before adding the slime release agent to 2.2.
It dropped to mg / dm 2 . From the above, it was confirmed that the slime removing agent has a slime removing effect and low corrosiveness.
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０２Ｆ 1/50 Ｃ０２Ｆ 1/50 ５２０Ｐ ５３１ ５３１Ｊ ５３１Ｍ ５３１Ｐ ５４０ ５４０Ｂ ５４０Ｄ 1/76 1/76 Ａ Ｃ０９Ｋ 3/00 Ｃ０９Ｋ 3/00 Ｓ Ｆ２８Ｆ 19/01 Ｆ２８Ｆ 19/00 ５０１Ｚ ５０１Ｂ (72)発明者 永井 直宏 東京都新宿区西新宿三丁目４番７号 栗田 工業株式会社内 Ｆターム(参考） 4D050 AA08 AA12 AB06 BB04 BB06 CA12 4H011 AA02 BA01 BB18 DA13 DD01 DF04 Front page continuation (51) Int.Cl. 7 Identification code FI theme code (reference) C02F 1/50 C02F 1/50 520P 531 531J 531M 531P 540 540B 540D 1/76 1/76 A C09K 3/00 C09K 3 / 00 S F28F 19/01 F28F 19/00 501Z 501B (72) Inventor Naohiro Nagai 3-4-7 Nishishinjuku, Shinjuku-ku, Tokyo Kurata Industry Co., Ltd. F-term (reference) 4D050 AA08 AA12 AB06 BB04 BB06 CA12 4H011 AA02 BA01 BB18 DA13 DD01 DF04
Claims (7)
／またはその塩とを含有するスライム剥離剤。1. A slime remover containing a chlorine-based oxidizing agent and sulfamic acid and / or a salt thereof.
である請求項１記載のスライム剥離剤。2. The slime remover according to claim 1, wherein the chlorine-based oxidizing agent is hypochlorous acid or a salt thereof.
ある請求項１記載のスライム剥離剤。3. The slime remover according to claim 1, wherein the chlorine-based oxidizing agent is sodium hypochlorite.
ン酸および／またはその塩とのモル比が２：１〜１：５
である請求項１ないし３のいずれかに記載のスライム剥
離剤。4. The molar ratio of available chlorine of the chlorine-based oxidizing agent to sulfamic acid and / or its salt is 2: 1 to 1: 5.
The slime release agent according to any one of claims 1 to 3.
ライム剥離剤を含むスライム剥離剤組成物。5. A slime release agent composition containing the slime release agent according to claim 1.
記載のスライム剥離剤またはスライム剥離剤組成物を添
加して、スライムを剥離するスライム剥離方法。6. A slime stripping method for stripping slime by adding the slime stripping agent or the slime stripping agent composition according to any one of claims 1 to 5 to an aqueous system.
中の有効塩素濃度として０．１〜１０００ｍｇ／Ｌであ
る請求項６に記載のスライム剥離方法。7. The slime stripping method according to claim 6, wherein the amount of the chlorine-based oxidizing agent added to the water system is 0.1 to 1000 mg / L as the effective chlorine concentration in the water system.
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