JPS63158198A - Method for washing drinking water storage tank - Google Patents
Method for washing drinking water storage tankInfo
- Publication number
- JPS63158198A JPS63158198A JP30727386A JP30727386A JPS63158198A JP S63158198 A JPS63158198 A JP S63158198A JP 30727386 A JP30727386 A JP 30727386A JP 30727386 A JP30727386 A JP 30727386A JP S63158198 A JPS63158198 A JP S63158198A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- storage tank
- aqueous solution
- drinking water
- water storage
- 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
- 235000020188 drinking water Nutrition 0.000 title claims abstract description 24
- 239000003651 drinking water Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000005406 washing Methods 0.000 title abstract description 5
- 239000007864 aqueous solution Substances 0.000 claims abstract description 39
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000126 substance Substances 0.000 claims abstract description 21
- 239000002253 acid Substances 0.000 claims abstract description 19
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 12
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 claims abstract description 9
- 150000007513 acids Chemical class 0.000 claims abstract description 4
- IIACRCGMVDHOTQ-UHFFFAOYSA-M sulfamate Chemical compound NS([O-])(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-M 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000001680 brushing effect Effects 0.000 description 4
- 229910044991 metal oxide Inorganic materials 0.000 description 4
- 150000004706 metal oxides Chemical class 0.000 description 4
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical class NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 2
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 2
- 239000005708 Sodium hypochlorite Substances 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 2
- 150000007973 cyanuric acids Chemical class 0.000 description 2
- 239000000645 desinfectant Substances 0.000 description 2
- 239000000174 gluconic acid Substances 0.000 description 2
- 235000012208 gluconic acid Nutrition 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 241000295146 Gallionellaceae Species 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000005791 algae growth Effects 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 239000011260 aqueous acid Substances 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- MWNQXXOSWHCCOZ-UHFFFAOYSA-L sodium;oxido carbonate Chemical compound [Na+].[O-]OC([O-])=O MWNQXXOSWHCCOZ-UHFFFAOYSA-L 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、飲料水内壁の洗浄方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method for cleaning the inner wall of drinking water.
マンション、病院、ホテル、高層ビル、その他多量に飲
料水が消費される所では、地下水、水道水等の飲料水は
一旦屋上、架台又は地下に設置された飲料水貯槽に貯え
られた後、配管を通して使用現場へ供給されている。と
ころが、長期間経過する間に、この貯槽内壁、特にその
水面に交接する付近の内壁には、帯状に水垢、スライム
、金属酸化物等錆類が沈着したり、場合によっては、そ
れに鉄バクテリアが繁殖したり、藻が生えることもある
。In apartments, hospitals, hotels, high-rise buildings, and other places where large amounts of drinking water are consumed, drinking water such as groundwater or tap water is stored in drinking water storage tanks installed on rooftops, mounts, or underground, and then piped. It is supplied to the site of use through. However, over a long period of time, strips of scale, slime, metal oxides, and other rust may be deposited on the inner walls of this storage tank, especially those near the water surface, and in some cases, iron bacteria may be deposited on the inner walls of the storage tank. It may also breed or cause algae to grow.
このように貯槽内壁が汚れ°ると不衛生であるから、そ
の洗浄が法律で義務づけられ、飲料水貯槽の洗浄は定期
的に行われるようになっている。Since it is unsanitary if the inner walls of the storage tank become dirty, cleaning is required by law, and drinking water storage tanks are now cleaned regularly.
（従来の技術）
飲料水貯槽内壁の洗浄法としては、５〜２０ｋｇ／ｃＩ
ｌｌ程度の高圧水をこの内壁に噴射したり、ブラシを用
いてかき落す方法等が行われている。(Prior art) As a method for cleaning the inner wall of a drinking water storage tank, 5 to 20 kg/cI
Methods such as spraying high-pressure water of about 1 liter onto this inner wall or scraping it off using a brush are used.
（発明が解決しようとする問題点）
上記高圧水による洗浄では、藻、スライム等の除去も完
全でなく、特に金属錆等は除去できず、特別の装置を用
いる割には効率的でない。また、。(Problems to be Solved by the Invention) The above-mentioned cleaning with high-pressure water does not completely remove algae, slime, etc., and in particular cannot remove metal rust, etc., and is not efficient even though special equipment is used. Also,.
ブラシを用いて洗浄する方法によっても、やはり金属錆
等は除去し難い。Even with the cleaning method using a brush, it is still difficult to remove metal rust and the like.
本発明は、水垢、スライム、金属錆等が付着した飲料水
貯・槽の内壁から、これら不衛生物質を効率よく除去で
きる洗浄方法を提供しようとするものである。The present invention aims to provide a cleaning method that can efficiently remove unsanitary substances such as limescale, slime, and metal rust from the inner walls of drinking water storage tanks.
（問題点を解決するための手段）
本発明の洗浄方法は、飲料水中の不衛生物質が付着した
飲料水貯槽内壁を、りん酸１００重量部と硫酸、スルフ
ァミン酸、スルファミン酸塩、オキシカルボン酸又はこ
れらの混合物１０〜１００重量部を含有し、かつ、これ
ら酸類の濃度が０．２〜２０重量％である水溶液で処理
することを特徴とする。(Means for Solving the Problems) The cleaning method of the present invention cleans the inner wall of a drinking water storage tank to which unsanitary substances in drinking water have adhered, using 100 parts by weight of phosphoric acid and sulfuric acid, sulfamic acid, sulfamic acid salts, and oxycarboxylic acid. Alternatively, the treatment is performed with an aqueous solution containing 10 to 100 parts by weight of a mixture of these acids and having a concentration of 0.2 to 20% by weight.
本発明の洗浄方法が適用される飲料水貯槽は屋上、架台
上、地下環に設置されているほぼ２〜２００ｄのもので
あり、通常コンクリート又は繊維強化プラスチックス（
ＦＲＰとも言う。）等から造られている。この貯槽に貯
えられる飲料水としては通常、水道水、地下水等であり
、殆ど毎日新しい飲料水が貯槽へ供給されると共に、使
用量に応じてこの供給された飲料水は貯槽から流出され
る。従って、この貯槽内壁の付着物は、水の静置によっ
て起る通常の沈澱とは異なって、強い付着力でもって内
壁に固着している。本発明の方法により除去される貯槽
内壁上の不衛生物資は、このような付着物であって、成
分分析によると、鉄、マンガン、その他金属の酸化物が
多く、その他に有機物も含まれている。この付着物は、
外観では黄褐色を呈すことが多く、水垢、或いはスライ
ムとも呼ばれ、特に貯槽内水面が上下してこれに交接す
る壁面の部分にはこの不衛生物質の付着量が多い。The drinking water storage tank to which the cleaning method of the present invention is applied is approximately 2 to 200 d installed on a rooftop, on a pedestal, or in an underground ring, and is usually made of concrete or fiber-reinforced plastic (
Also called FRP. ) etc. The drinking water stored in this storage tank is usually tap water, underground water, etc., and new drinking water is supplied to the storage tank almost every day, and the supplied drinking water is drained from the storage tank depending on the amount used. Therefore, this deposit on the inner wall of the storage tank is different from normal precipitation caused by standing water, and adheres to the inner wall with a strong adhesive force. The unsanitary substances on the inner wall of the storage tank that are removed by the method of the present invention are such deposits, and according to component analysis, they contain many oxides of iron, manganese, and other metals, and also contain organic substances. There is. This deposit is
It often has a yellowish-brown appearance and is also called water scale or slime, and a large amount of this unsanitary substance is deposited especially on the wall surface where the water level in the tank rises and falls and intersects with it.
本発明により、かかる不衛生物質は、特定組成の酸の水
溶液で上記貯槽内壁を処理することにより容易に除去さ
れる。この水溶液に用いられるりん酸、硫酸、スルファ
ミン酸、スルファミン酸塩、オキシカルボン酸等は、通
常の工業製品でよいが、有害成分を含まないものが好ま
しい。スルファミン酸塩としても、有害な成分を含まな
いものが好ましく、その例としては、ナトリウム塩、カ
リウム塩、カルシウム塩、マグネシウム塩、アルミニウ
ム塩等が挙げられる。また、オキシカルボン酸の例とし
て・は、グルコン酸、クエン酸等が挙げられる。この水
溶液の酸の濃度としては、通常０．２〜２０重量％、好
ましくは０．５〜１０重量％がよく、かかる濃度となる
ように、上記りん酸を１００重量部と硫酸、スルファミ
ン酸、スルファミン酸塩、オキシカルボン酸又はこれら
の混合物を１０〜１００重量部、好ましくは２０〜ｓｏ
ｗｎ部の比率に水に加えることによって容易に得られる
。According to the present invention, such unsanitary substances are easily removed by treating the inner wall of the storage tank with an aqueous solution of an acid having a specific composition. The phosphoric acid, sulfuric acid, sulfamic acid, sulfamic acid salt, oxycarboxylic acid, etc. used in this aqueous solution may be ordinary industrial products, but those containing no harmful components are preferred. The sulfamate salt is preferably one that does not contain harmful components, and examples thereof include sodium salt, potassium salt, calcium salt, magnesium salt, aluminum salt, and the like. Examples of oxycarboxylic acids include gluconic acid and citric acid. The concentration of the acid in this aqueous solution is usually 0.2 to 20% by weight, preferably 0.5 to 10% by weight. 10 to 100 parts by weight of sulfamate, oxycarboxylic acid, or a mixture thereof, preferably 20 to so
It is easily obtained by adding water to the ratio of wn part.
この水溶液には、本発明の目的が達成される限り、上記
成分の他に、任意の成分を含有させてもよい。場合によ
っては、更に好ま・しい水溶液も得られる。例えば、過
酸化水素、過炭酸ソーダ等過酸化物、次亜塩素酸ナトリ
ウム、硬度さらし粉、塩素化イソシアヌール酸等を加え
ると殺菌、漂白の効果と共に、上記不衛生物質の除去も
一層容易となる。また、ポリビニルアルコール等増粘剤
を加えて扱い易い液としたり、配管部に水溶液が接触し
ても腐食が起らぬように防食剤、防錆剤等を、加えたり
、或いは、界面活性剤を加えて不衛生物質の除去効果を
向上させたりすることができる。This aqueous solution may contain any other components in addition to the above components as long as the object of the present invention is achieved. In some cases, even more preferable aqueous solutions can be obtained. For example, adding peroxides such as hydrogen peroxide, soda percarbonate, sodium hypochlorite, hard bleaching powder, chlorinated isocyanuric acid, etc. will not only have sterilizing and bleaching effects, but also make it easier to remove the unsanitary substances mentioned above. . In addition, thickeners such as polyvinyl alcohol may be added to make the liquid easier to handle, and anticorrosives and rust preventives may be added to prevent corrosion even if the aqueous solution comes into contact with piping, or surfactants may be added. can be added to improve the removal effect of unsanitary substances.
通常、これら添加物質は少量でよい。Usually, small amounts of these additives are sufficient.
本発明により、上記貯槽内壁を上記水溶液で処理するこ
とは、貯水を排出した後この貯槽内壁に、例えば、上記
水溶液を吹き付ける方法、或いは、スポンジローラー、
刷毛等により塗布する方法によって容易に行うことがで
きる。この内壁の立面では、この面上を水溶液は流下す
るが、粘度の低い水溶液の場合には繰り返し上部に水溶
液を吹きつけたり、塗布するとよい。According to the present invention, treating the inner wall of the storage tank with the aqueous solution can be performed by, for example, spraying the aqueous solution on the inner wall of the storage tank after draining the stored water, or using a sponge roller,
This can be easily done by applying with a brush or the like. The aqueous solution flows down on this vertical surface of the inner wall, but in the case of an aqueous solution with low viscosity, it is advisable to repeatedly spray or apply the aqueous solution to the upper part.
また、藻が発生したり、スライム量の多い貯槽内壁の場
合には、予め従来法の高圧水噴射、ブラシかけ等を施し
た後、上記水溶液による処理を施すと効果的である。特
に、上記水溶液による処理を施した後、ブラシかけを行
うと上記不衛生物質は容易に除去される。更に清浄とす
るには、次いで水洗いと湿布拭きを施し、殺菌剤による
消毒を行うのがよい。これに用いられる殺菌剤としては
、通常のものでよく、例えば次亜塩素酸塩、さらし粉、
塩素化イソシアヌール酸等が挙げられる。Furthermore, in the case of algae growth or a large amount of slime on the inner wall of the storage tank, it is effective to perform treatment with the above aqueous solution after applying conventional high-pressure water jetting, brushing, etc. in advance. In particular, the unsanitary substances can be easily removed by brushing after the treatment with the aqueous solution. To further clean it, it is best to wash it with water, wipe it with a damp cloth, and disinfect it with a disinfectant. The disinfectants used for this purpose may be ordinary ones, such as hypochlorite, bleaching powder,
Examples include chlorinated isocyanuric acid.
上記の如くして不衛生物質が除去されると、貯槽内壁は
清浄な基材の外観を呈す。要すれば更に水洗が施される
。Once the unsanitary substances are removed as described above, the inner wall of the reservoir assumes the appearance of a clean substrate. Further washing with water is performed if necessary.
（作 用）
飲料水貯槽内壁に付着した不衛生物質は、単一物質では
なく、水中の微量に存する各種浮遊物、菌、溶解物質等
が不規則に沈着、付着して生じた固い組織構造物と考え
られ、無機成分としては各種金属酸化物が含まれている
。(Function) The unsanitary substances adhering to the inner wall of the drinking water storage tank are not a single substance, but a hard tissue structure created by irregularly depositing and adhering various suspended matter, bacteria, dissolved substances, etc. present in minute amounts in the water. It is considered to be a substance, and its inorganic components include various metal oxides.
この付着した不衛生物質が、本発明により水溶液と接触
して除去されるのは、この水溶液に含まれる酸が各種金
属酸化物を付着物から溶出し、固い組織構造が崩壊し易
い構造に変換することによるものと考えられる。従って
、水溶液中酸濃度として０．２重量％以上を要すことは
、この金属酸化物を速やかに溶出させる要件であって、
これによって付着物の除去を容易ならしめているものと
考えられる。しかし、過度に酸濃度を高めると、基材に
損傷を与え易く、また、酸の消費量も多くなり好ましく
ない。This adhered unsanitary substance is removed by contact with an aqueous solution according to the present invention because the acid contained in this aqueous solution dissolves various metal oxides from the adhered substance and converts the hard tissue structure into a structure that is easy to collapse. This is thought to be due to the Therefore, requiring an acid concentration of 0.2% by weight or more in the aqueous solution is a requirement for prompt elution of this metal oxide, and
It is thought that this makes it easier to remove deposits. However, excessively increasing the acid concentration is undesirable because it tends to damage the base material and also increases the amount of acid consumed.
本発明により、水溶液にりん酸の他硫酸、スルファミン
酸、スルファミン酸塩、オキシカルボン酸等を特定量混
合することにより、単独の酸では溶解しにくい付着物中
の各種の無機酸化物が溶解し易くなるものと考えられる
。According to the present invention, by mixing a specific amount of sulfuric acid, sulfamic acid, sulfamate, oxycarboxylic acid, etc. in addition to phosphoric acid in an aqueous solution, various inorganic oxides in deposits that are difficult to dissolve with a single acid can be dissolved. It is thought that it will become easier.
水溶液中に増粘剤が加えられると、これによって高い粘
度となった水溶液は、貯槽内壁の立面を降下する際、そ
の流下速度をゆるやかにして、付着物との接触時間を増
加させ、効果発現を充分ならしめる。また、水溶液中に
加えられる界面活性剤も、水溶液が付着物に浸透するの
を助長する。When a thickener is added to an aqueous solution, the aqueous solution has a high viscosity, and when it descends down the vertical surface of the inner wall of the storage tank, it slows down its flow rate and increases the contact time with deposits. Allow sufficient expression. Surfactants added to the aqueous solution also help the aqueous solution penetrate into deposits.
上記酸の水溶液による処理を施した後ブラシかけを施し
たり、更に湿布による拭き取りを施すと、水溶液との接
触で付着力の弱まった残余の不衛生物質を貯槽内壁から
速やかに除去することができる。After treatment with the aqueous acid solution, brushing or wiping with a compress can quickly remove residual unsanitary substances that have weakened their adhesion from contact with the aqueous solution from the inner walls of the storage tank. .
（実施例）
同一飲料水を使用している同一地区のマンションに設け
られた３ＭのＦＲＰ製の飲料水貯ＷＮａｌ〜４の４基に
ついて、貯槽内壁をしらべたところ、いずれも水面上下
部壁面の全周が黄褐色に汚れているのと確認し１．これ
らについて貯水を排出した後、以下の比較例１〜２と実
施例１〜４の洗浄を行った。いずれの洗浄においても、
水又は水溶液はコンプレッサー加圧によってノズル先端
から、上記汚れを含む貯槽内壁に向けて吹きつけられた
。(Example) When we examined the inner walls of the four 3M FRP drinking water storage WNal~4 installed in apartments in the same district that use the same drinking water, we found that all of them had a Confirm that the entire circumference is yellowish brown.1. After draining the stored water, the following Comparative Examples 1 to 2 and Examples 1 to 4 were washed. In any cleaning,
The water or aqueous solution was sprayed from the nozzle tip by compressor pressure toward the dirt-containing inner wall of the storage tank.
比較例１及び実施例１
上記Ｎｌｌの貯槽について比較例１として、０．６重量
％の硫酸水溶液をノズルから連続的に上記黄褐色を呈し
て汚れている壁面に約８１７分の流速で５分間吹きつけ
たが、当初の黄褐色はそのまま残り、除去できないこと
を認めた。Comparative Example 1 and Example 1 As Comparative Example 1 for the NII storage tank, a 0.6% by weight sulfuric acid aqueous solution was continuously applied from the nozzle onto the yellowish brown and dirty wall surface for 5 minutes at a flow rate of about 817 minutes. Although he sprayed it, he admitted that the original tan color remained and could not be removed.
次いで、上記吹きつけ部分を含む内壁を、用いた酸の水
溶液が残存しないように水で充分に洗浄した後、実施例
１としてりん酸０．４重量％とスルファミン酸０．２重
量％とを含有する水溶液を上記比較例１と同様にして吹
きつけたところ、約５分後に黄褐色の汚れは完全に消失
した。Next, the inner wall including the sprayed portion was thoroughly washed with water so that the aqueous solution of the acid used did not remain, and then 0.4% by weight of phosphoric acid and 0.2% by weight of sulfamic acid were added as Example 1. When the containing aqueous solution was sprayed in the same manner as in Comparative Example 1, the yellowish brown stain completely disappeared after about 5 minutes.
比較例２及び実施例２
比較例１の硫酸水溶液を用いる代わりに、比較例２とし
て０．６重量％のりん酸水溶液を用いて隘２の貯槽につ
いて行ったが、１０分後汚れの黄褐色は幾分薄らいだ。Comparative Example 2 and Example 2 Instead of using the sulfuric acid aqueous solution in Comparative Example 1, a 0.6% by weight phosphoric acid aqueous solution was used in Comparative Example 2 for the storage tank in No. 2, but after 10 minutes, the stain turned yellowish brown. has faded somewhat.
更に５分吹きつけたが、汚れの黄褐色の変化は顕著では
なかった。Spraying was continued for an additional 5 minutes, but the yellow-brown color of the stain was not noticeable.
次いで、この貯槽内壁を水で洗い流した後、実施例２と
して、りん酸０．４重量％と硫酸０．２重量％とを含有
する水溶液を、上記同様にして吹きつけたところ、約５
分後には汚れの黄褐色は完全に消失した。Next, after washing the inner wall of this storage tank with water, as Example 2, an aqueous solution containing 0.4% by weight of phosphoric acid and 0.2% by weight of sulfuric acid was sprayed in the same manner as above.
After a few minutes, the yellow-brown color of the stain completely disappeared.
実施例３及び４
りん酸１重量％とスルファミン酸０．２重量％と防錆剤
ロージン０．０５重量％とポリビニルアルコール０．５
重量％とを含有する水溶液を用いた実施例３と、りん酸
２重量％とグルコン酸０．６重量％と防錆剤ロージン０
．０５重重景とポリビニルアルコール０．５重量％とを
含有する水溶液を用いた実施例４を行った。実施例３で
は隘３の貯槽が、また実施例４では隘４の貯槽が用いら
れた。これらの実施例では、刷毛を用いて粘稠な上記水
溶液が貯槽の黄褐色の汚れの部分に塗布された。水溶液
はゆるやかに壁面を流下したが、約１分後当初の黄褐色
はかなり薄らいだ。次いで、ブラシかけを−行った後、
水洗すると、貯槽内壁は清浄な基材の外観を呈した。こ
の内壁を湿布で拭いた後、０．１重量％の次亜塩素酸ナ
トリウム水溶液ふりかけ、更に水をふりかけて洗浄を終
えた。Examples 3 and 4 1% by weight of phosphoric acid, 0.2% by weight of sulfamic acid, 0.05% by weight of rust inhibitor rosin, and 0.5% by weight of polyvinyl alcohol
Example 3 using an aqueous solution containing 2% by weight of phosphoric acid, 0.6% by weight of gluconic acid, and 0% by weight of the rust inhibitor rosin.
．． Example 4 was conducted using an aqueous solution containing 0.05 heavy weight and 0.5% by weight of polyvinyl alcohol. In Example 3, the storage tank in No. 3 was used, and in Example 4, the storage tank in No. 4 was used. In these examples, the viscous aqueous solution was applied to the yellow-brown soiled area of the reservoir using a brush. The aqueous solution slowly flowed down the wall, but after about 1 minute, the initial yellow-brown color had faded considerably. Next, after brushing,
After washing with water, the inner walls of the reservoir took on the appearance of a clean substrate. After wiping this inner wall with a compress, a 0.1% by weight aqueous sodium hypochlorite solution was sprinkled on it, and then water was further sprinkled on it to complete the cleaning.
（発明の効果）
本発明の洗浄方法に用いられる水溶液は容易に調整する
ことができ、これを用いると従来の洗浄法では除去困難
であった飲料水貯槽内壁に付着した水垢、スライム、金
属錆等不衛生物質を容易に除去することができる。しか
も、本発明によると、この貯槽内壁の不衛生物質を簡易
な操作で短時間に除去することができる。(Effects of the Invention) The aqueous solution used in the cleaning method of the present invention can be easily prepared, and can be used to remove limescale, slime, and metal rust from the inner walls of drinking water storage tanks, which were difficult to remove using conventional cleaning methods. and other unsanitary substances can be easily removed. Moreover, according to the present invention, the unsanitary substances on the inner wall of the storage tank can be removed in a short time with a simple operation.
Claims (1)
ん酸１００重量部と硫酸、スルファミン酸、スルファミ
ン酸塩、オキシカルボン酸又はこれらの混合物１０〜１
００重量部を含有し、かつ、これら酸の濃度が０．２〜
２０重量％である水溶液で処理することを特徴とする飲
料水貯槽の洗浄方法。The inner wall of a drinking water storage tank to which unsanitary substances in drinking water have adhered is treated with 100 parts by weight of phosphoric acid and 10 to 1 part of sulfuric acid, sulfamic acid, sulfamate, oxycarboxylic acid, or a mixture thereof.
00 parts by weight, and the concentration of these acids is from 0.2 to
A method for cleaning a drinking water tank, characterized in that it is treated with an aqueous solution having a concentration of 20% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30727386A JPS63158198A (en) | 1986-12-23 | 1986-12-23 | Method for washing drinking water storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30727386A JPS63158198A (en) | 1986-12-23 | 1986-12-23 | Method for washing drinking water storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63158198A true JPS63158198A (en) | 1988-07-01 |
Family
ID=17967135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30727386A Pending JPS63158198A (en) | 1986-12-23 | 1986-12-23 | Method for washing drinking water storage tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63158198A (en) |
-
1986
- 1986-12-23 JP JP30727386A patent/JPS63158198A/en active Pending
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