JPS6159796B2 - - Google Patents
Info
- Publication number
- JPS6159796B2 JPS6159796B2 JP827978A JP827978A JPS6159796B2 JP S6159796 B2 JPS6159796 B2 JP S6159796B2 JP 827978 A JP827978 A JP 827978A JP 827978 A JP827978 A JP 827978A JP S6159796 B2 JPS6159796 B2 JP S6159796B2
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen peroxide
- slime
- present
- potassium permanganate
- amount
- 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
Links
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 43
- 238000000034 method Methods 0.000 claims description 9
- 239000012286 potassium permanganate Substances 0.000 claims description 8
- 150000003839 salts Chemical class 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 230000007935 neutral effect Effects 0.000 claims description 6
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- 102000016938 Catalase Human genes 0.000 description 2
- 108010053835 Catalase Proteins 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Description
本発明は、用水系統の機器、装置内に発生する
スライムを過酸化水素を用いて除去する方法に関
するものである。
工業用水、海水、地下水、上水等を利用する用
水系統の機器、装置、例えば冷却器、凝縮器等あ
るいはその配管内には、細菌類、藻類あるいは微
生物が繁殖し、鉄サビ、土砂とともに粘性をもつ
たスライムを形成する。このスライムは、配管の
閉塞、冷却効率の低下等種々の障害を引起すた
め、その除去方法が種々検討されている。塩素系
化合物等の殺菌剤を使用する方法があるが、スラ
イムを剥離分散させる効果が十分でなく、専ら過
酸化水素が使用されている。しかしながら、過酸
化水素単独では、スライムの剥離が遅く短時間で
は十分な剥離効果が望めないため、高濃度のもの
が使用されているが、そのために処理後の廃水中
に依然として未反応の過酸化水素が残存し、過酸
化水素が有効に利用されないだけでなくその廃水
をそのまま放流することができない等の難点があ
る。そこで、ある種の活性剤、例えば酵素カタラ
ーゼ等過酸化水素分解触媒を添加して低濃度の過
酸化水素でスライムを除去する方法も検討されて
いるが、これらの方法では過酸化水素の分解が激
しく短時間のうちに過酸化水素が分解してしま
い、スライムの剥離分散が完全に行われる前に過
酸化水素が消失してしまう。本発明者等は、これ
らの問題点を解消すべく鋭意研究したところ、中
性塩の存在下で過酸化水素と過マンガン酸カリウ
ムとの反応（中性〜微アルカリ性域反応）を行な
うと、不溶性の二酸化マンガンの生成量が、理論
量よりも著しく軽減でき、過酸化水素の分解も緩
慢になることを見出し本発明を完成した。
即ち、本発明は、過酸化水素を用いてスライム
を除去するに際し、過マンガン酸カリウムおよび
中性塩を添加することを特徴とするスライムの除
去方法である。本発明で使用できる中性塩とは、
その水溶液が酸性でもアルカリ性でもない塩、例
えば、硫酸ナトリウム、硝酸カリウム等（還元性
の塩は除く）であり、その添加量は、使用する過
酸化水素の量に対して0.2〜5.0重量％、好ましく
は0.7〜1.4重量％である。又過マンガン酸カリウ
ムの添加量は触媒量である。本発明の特徴は、上
記範囲内の中性塩を添加することにより、過酸化
水素が短時間で消失してしまうことを防止できる
ために、過マンガン酸カリウムの過酸化水素への
触媒効果（スライムの酸化および剥離促進）が増
大することにある。本発明方法によれば、過酸化
水素単独ではスライムを完全に剥離するのに長時
〓〓〓〓〓
間かかるという難点、またカタラーゼ等と併用し
た場合の過酸化水素が急激に分解してしまうとい
う難点等が、共に解消できるために極めて有利な
スライム除去方法となる。以下に本発明を実施例
で説明する。
実施例 １
標準能力10冷却トン、保有水量200、循環水
量130／minのクーリンングタワー内に粘性の
スライムが発生してパツケージクーラーの運転圧
力が19Kg／cm2となつて運転不能となつたとき、35
％過酸化水素20Kg、硫酸ナトリウム50ｇおよび過
マンガン酸カリウム５ｇを約半量づつ２回にわけ
て10分間隔で投入した。その溶液を70分間循環さ
せ、その後洗浄水を循環させると、スライムは剥
離して処理廃水とともに流出し、パツケージクー
ラーの運転圧力は13Kg／cm2となつて正常に運転で
きるようになつた。
実施例 ２
３％過酸化水素溶液100mlに下記の組成物を
0.022ｇおよび0.043ｇ添加した時の過酸化水素の
分解率、発泡時間および二酸化マンガンの沈澱の
状態を調べた。その結果を第１表に示す。
組成物Ａ（本発明品）：硫酸ナトリウム90重量部
と過マンガン酸カリウム10重量部の混合物
組成物Ｂ（比較品）：炭酸ナトリウム90重量部と
過マンガン酸カリウム10重量部の混合物
The present invention relates to a method for removing slime generated in water system equipment and equipment using hydrogen peroxide. Bacteria, algae, or microorganisms grow in water system equipment and devices that use industrial water, seawater, groundwater, tap water, etc., such as coolers, condensers, etc., or in their piping, causing iron rust, dirt, and viscous Forms slime with Since this slime causes various problems such as clogging of pipes and a decrease in cooling efficiency, various methods for removing the slime have been studied. Although there are methods of using disinfectants such as chlorine-based compounds, they are not effective in removing and dispersing slime, so hydrogen peroxide is exclusively used. However, hydrogen peroxide alone is slow to remove slime and cannot be expected to have a sufficient removal effect in a short period of time, so high concentrations of hydrogen peroxide are used. There are disadvantages in that not only hydrogen remains and hydrogen peroxide is not effectively utilized, but also the waste water cannot be discharged as it is. Therefore, methods are being considered to remove slime with a low concentration of hydrogen peroxide by adding some type of activator, such as a hydrogen peroxide decomposition catalyst such as the enzyme catalase, but these methods do not allow the decomposition of hydrogen peroxide. Hydrogen peroxide decomposes rapidly and in a short period of time, and disappears before the slime is completely peeled and dispersed. The present inventors conducted intensive research to solve these problems, and found that when hydrogen peroxide and potassium permanganate are reacted in the presence of a neutral salt (neutral to slightly alkaline reaction), The present invention was completed by discovering that the amount of insoluble manganese dioxide produced can be significantly reduced compared to the theoretical amount, and that the decomposition of hydrogen peroxide is also slowed down. That is, the present invention is a slime removal method characterized by adding potassium permanganate and a neutral salt when removing slime using hydrogen peroxide. The neutral salt that can be used in the present invention is
The aqueous solution is a salt that is neither acidic nor alkaline, such as sodium sulfate, potassium nitrate, etc. (excluding reducing salts), and the amount added is preferably 0.2 to 5.0% by weight based on the amount of hydrogen peroxide used. is 0.7-1.4% by weight. Further, the amount of potassium permanganate added is a catalytic amount. A feature of the present invention is that by adding a neutral salt within the above range, it is possible to prevent hydrogen peroxide from disappearing in a short period of time, so that the catalytic effect of potassium permanganate on hydrogen peroxide ( oxidation of slime and acceleration of peeling). According to the method of the present invention, hydrogen peroxide alone takes a long time to completely remove slime.
This is an extremely advantageous slime removal method because it can eliminate both the disadvantages of time consuming and the rapid decomposition of hydrogen peroxide when used in combination with catalase and the like. The present invention will be explained below using examples. Example 1: When viscous slime was generated in a cooling tower with a standard cooling capacity of 10 tons, a water capacity of 200, and a circulating water rate of 130/min, the operating pressure of the package cooler became 19 Kg/cm 2 and became inoperable. , 35
20 kg of hydrogen peroxide, 50 g of sodium sulfate, and 5 g of potassium permanganate were added in two portions of about half each at 10 minute intervals. When the solution was circulated for 70 minutes and then the washing water was circulated, the slime was separated and flowed out together with the treated wastewater, and the operating pressure of the package cooler became 13 kg/cm 2 , allowing normal operation. Example 2 Add the following composition to 100ml of 3% hydrogen peroxide solution.
The decomposition rate of hydrogen peroxide, foaming time, and state of precipitation of manganese dioxide when 0.022g and 0.043g were added were investigated. The results are shown in Table 1. Composition A (product of the present invention): a mixture of 90 parts by weight of sodium sulfate and 10 parts by weight of potassium permanganate Composition B (comparative product): a mixture of 90 parts by weight of sodium carbonate and 10 parts by weight of potassium permanganate
【表】
た。
第１表に示す如く、本発明品の組成物Ａを用い
たものは、二酸化マンガンの沈澱の生成が、ごく
微量であり、過酸化水素は長時間に渡つて発泡を
継続する。尚、本発明品においては、溶液の色調
も無色透明であり、極めて良好である。
〓〓〓〓〓
[Table]
As shown in Table 1, in the products of the present invention using composition A, only a very small amount of manganese dioxide precipitate was formed, and hydrogen peroxide continued to foam for a long time. In addition, in the product of the present invention, the color tone of the solution is also colorless and transparent, which is extremely good. 〓〓〓〓〓
Claims (1)
を除去するに際し、用水系統内に過酸化水素、過
マンガン酸カリウムおよび中性塩を添加すること
を特徴とするスライムの除去方法。1. A method for removing slime, which comprises adding hydrogen peroxide, potassium permanganate, and a neutral salt into the water system when removing slime generated in the equipment and equipment of the water system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP827978A JPS54101783A (en) | 1978-01-30 | 1978-01-30 | Slime removing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP827978A JPS54101783A (en) | 1978-01-30 | 1978-01-30 | Slime removing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54101783A JPS54101783A (en) | 1979-08-10 |
| JPS6159796B2 true JPS6159796B2 (en) | 1986-12-18 |
Family
ID=11688734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP827978A Granted JPS54101783A (en) | 1978-01-30 | 1978-01-30 | Slime removing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54101783A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4312761A (en) * | 1980-05-28 | 1982-01-26 | Zimpro-Aec Ltd. | Treatment of clay slimes |
| JP6015358B2 (en) * | 2012-11-01 | 2016-10-26 | 栗田エンジニアリング株式会社 | Corrosion prevention method for copper alloy heat exchangers |
-
1978
- 1978-01-30 JP JP827978A patent/JPS54101783A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54101783A (en) | 1979-08-10 |
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