JP7133823B1 - Pipe cleaning method - Google Patents
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- JP7133823B1 JP7133823B1 JP2022037862A JP2022037862A JP7133823B1 JP 7133823 B1 JP7133823 B1 JP 7133823B1 JP 2022037862 A JP2022037862 A JP 2022037862A JP 2022037862 A JP2022037862 A JP 2022037862A JP 7133823 B1 JP7133823 B1 JP 7133823B1
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- 238000004140 cleaning Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 30
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 50
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 239000011347 resin Substances 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 21
- 235000011089 carbon dioxide Nutrition 0.000 claims abstract description 20
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 15
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000007864 aqueous solution Substances 0.000 abstract description 12
- 239000000243 solution Substances 0.000 abstract description 9
- 239000000843 powder Substances 0.000 abstract description 3
- 230000001954 sterilising effect Effects 0.000 abstract description 2
- 241000209094 Oryza Species 0.000 description 8
- 235000007164 Oryza sativa Nutrition 0.000 description 8
- 235000009566 rice Nutrition 0.000 description 8
- 238000005406 washing Methods 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229920001083 polybutene Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 241000589248 Legionella Species 0.000 description 1
- 241000589517 Pseudomonas aeruginosa Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 235000013345 egg yolk Nutrition 0.000 description 1
- 210000002969 egg yolk Anatomy 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000012907 honey Nutrition 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Cleaning In General (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
【課題】樹脂管の内表面に形成されているバイオフィルムの除去及び殺菌を行うことができる管内洗浄方法を提供する。【解決手段】管内洗浄方法は、エタノール水溶液を冷却することで、粘度が３００ｍＰａ・ｓ以上２００００ｍＰａ・ｓ以下である洗浄液を生成する洗浄液生成工程Ｓ２と、圧縮された空気と共に洗浄液を樹脂管に供給する洗浄工程Ｓ３と、を備えている。エタノール水溶液は、重量パーセント濃度が３０％以上９０％以下である。洗浄液生成工程Ｓ２では、エタノール水溶液と粉状のドライアイスとを混合することで、エタノール水溶液を冷却する。また、管内洗浄方法は、洗浄液生成工程Ｓ２の前に、液化炭酸ガスのボンベから空気中に炭酸ガスを放出することで、粉状のドライアイスを生成するドライアイス生成工程Ｓ１を備えている。樹脂管は、給水用又は給湯用である。【選択図】図１A pipe interior cleaning method capable of removing and sterilizing a biofilm formed on the inner surface of a resin pipe is provided. A method for cleaning the inside of a pipe includes a step S2 of cooling an ethanol aqueous solution to generate a cleaning solution having a viscosity of 300 mPa·s or more and 20000 mPa·s or less, and supplying the cleaning solution to a resin pipe together with compressed air. and a cleaning step S3. The aqueous ethanol solution has a weight percent concentration of 30% or more and 90% or less. In the cleaning liquid generation step S2, the ethanol aqueous solution is cooled by mixing the ethanol aqueous solution and dry ice powder. The pipe interior cleaning method also includes a dry ice generation step S1 for generating dry ice powder by releasing carbon dioxide gas from a liquefied carbon dioxide gas cylinder into the air before the cleaning liquid generation step S2. The resin pipe is for water supply or hot water supply. [Selection drawing] Fig. 1
Description
本発明は、管内洗浄方法に関する。 TECHNICAL FIELD The present invention relates to an in-pipe cleaning method.
住戸等における給水管や給湯管には、従来、鋼管や銅管等の金属配管が用いられていたが、今はポリエチレン管やポリブデン管等の樹脂管が用いられている（例えば、特許文献１参照）。樹脂管であれば、金属配管のような錆びは生じず、また耐久性が高く、結果として漏水は起こりにくい。 Conventionally, metal pipes such as steel pipes and copper pipes were used for water supply pipes and hot water supply pipes in dwelling units, etc., but now resin pipes such as polyethylene pipes and polybutene pipes are used (for example, Patent Document 1 reference). Resin pipes do not rust unlike metal pipes, and are highly durable, so water leakage is less likely to occur.
しかし、樹脂管の内表面には、微生物によるバイオフィルムが形成され、それを放置することで、緑膿菌やレジオネラ菌の培養の巣と化す。したがって、定期的な管内洗浄によって、バイオフィルムの除去及び殺菌を行うことが望まれる。 However, a biofilm formed by microorganisms is formed on the inner surface of the resin pipe, and if left unattended, it becomes a breeding nest for Pseudomonas aeruginosa and Legionella bacteria. Therefore, it is desirable to remove biofilms and sterilize them by cleaning the inside of pipes periodically.
このようなバイオフィルムの問題点は、給水用や給湯用の樹脂管の場合に限定されず、水分が影響する設備配管の場合に共通して存在する。 Such biofilm problems are not limited to resin pipes for water supply or hot water supply, but commonly exist in equipment pipes affected by moisture.
本発明は、上記課題を鑑みてなされたものであり、樹脂管の内表面に形成されているバイオフィルムの除去及び殺菌を行うことができる管内洗浄方法を提供することを目的とする。 The present invention has been made in view of the above problems, and an object of the present invention is to provide a pipe cleaning method capable of removing and sterilizing a biofilm formed on the inner surface of a resin pipe.
（１）本発明は、エタノール水溶液を冷却することで、粘度が３００ｍＰａ・ｓ以上２００００Ｐａ・ｓ以下である洗浄液を生成する洗浄液生成工程と、圧縮された空気と共に前記洗浄液を樹脂管に供給する洗浄工程と、を備え、前記洗浄液生成工程では、前記エタノール水溶液と粉状のドライアイスとを混合することで、前記エタノール水溶液を冷却する管内洗浄方法である。 (1) The present invention includes a cleaning liquid generating step of cooling an ethanol aqueous solution to generate a cleaning liquid having a viscosity of 300 mPa·s or more and 20000 Pa·s or less, and supplying the cleaning liquid to a resin pipe together with compressed air. and a step of cooling the ethanol aqueous solution in the cleaning liquid generating step by mixing the ethanol aqueous solution and dry ice powder .
本発明によれば、粘度が３００ｍＰａ・ｓ以上２００００ｍＰａ・ｓ以下で、つきたての餅のようなドロッとした洗浄液を用いるので、低粘度でサラッとした洗浄液を用いる場合と比較して、樹脂管の中で洗浄液が滞留する時間が長くなると共に、バイオフィルムを物理的に押し出す力が強くなる。これにより、洗浄能力を高めることができる。
また、本発明によれば、エタノール水溶液と粉状のドライアイスとを混合することで、エタノール水溶液を冷却するので、つきたての餅のようなドロッとした洗浄液を容易に生成することができる。
According to the present invention, the viscosity is 300 mPa·s or more and 20000 mPa·s or less, and a thick cleaning liquid like freshly pounded rice cake is used. The longer the cleaning solution stays in the tube, the stronger the force that physically pushes the biofilm out. Thereby, cleaning ability can be improved.
Further, according to the present invention, the ethanol aqueous solution is cooled by mixing the ethanol aqueous solution and the powdery dry ice, so that a thick washing liquid like freshly pounded rice cake can be easily produced. .
（２）本発明はまた、前記エタノール水溶液は、重量パーセント濃度が３０％以上９０％以下である上記（１）に記載の管内洗浄方法である。 (2) The present invention is also the tube interior cleaning method according to (1) above, wherein the aqueous ethanol solution has a weight percent concentration of 30% or more and 90% or less.
本発明によれば、重量パーセント濃度が３０％以上９０％以下であるエタノール水溶液を用いるので、つきたての餅のようなドロッとした洗浄液を容易に生成することができる。 According to the present invention, since an aqueous ethanol solution having a weight percent concentration of 30% or more and 90% or less is used, it is possible to easily produce a thick washing liquid like freshly pounded rice cake.
（３）本発明はまた、前記洗浄液生成工程の前に、液化炭酸ガスのボンベから空気中に炭酸ガスを放出することで、前記粉状のドライアイスを生成するドライアイス生成工程を備えている上記（１）又は（２）に記載の管内洗浄方法である。 ( 3 ) The present invention also includes a dry ice generating step of generating the powdery dry ice by releasing carbon dioxide into the air from a liquefied carbon dioxide cylinder before the cleaning liquid generating step. The pipe interior cleaning method according to ( 1 ) or (2) above.
本発明によれば、液化炭酸ガスのボンベから空気中に炭酸ガスを放出することで、粉状のドライアイスを生成するので、粉状のドライアイスを容易に生成することができ、ひいては、つきたての餅のようなドロッとした洗浄液を容易に生成することができる。 According to the present invention, powdery dry ice is generated by releasing carbon dioxide gas into the air from a liquefied carbon dioxide gas cylinder. It is possible to easily generate a thick washing liquid like fresh rice cake.
本発明の上記（１）～（４）に記載の管内洗浄方法によれば、樹脂管の内表面に形成されているバイオフィルムの除去及び殺菌を行うことができる。 According to the tube interior cleaning method described in (1) to (4) of the present invention, biofilms formed on the inner surface of the resin tube can be removed and sterilized.
以下、図面を参照して、本発明の実施形態に係る管内洗浄方法について、詳細に説明する。 Hereinafter, a pipe cleaning method according to an embodiment of the present invention will be described in detail with reference to the drawings.
まず、図１を用いて、管内洗浄方法の工程の流れについて説明する。図１は、管内洗浄方法の工程の流れを説明するフローチャートである。 First, with reference to FIG. 1, the process flow of the tube cleaning method will be described. FIG. 1 is a flow chart for explaining the process flow of the pipe cleaning method.
図１に示す管内洗浄方法は、マンション等の建物内に配置された給水用又は給湯用の樹脂管（例えば、ポリエチレン管やポリブデン管等）を洗浄する方法である。具体的に、管内洗浄方法は、ドライアイス生成工程Ｓ１と、洗浄液生成工程Ｓ２と、洗浄工程Ｓ３と、を備えている。 The pipe interior cleaning method shown in FIG. 1 is a method for cleaning a resin pipe (for example, a polyethylene pipe, a polybutene pipe, etc.) for supplying water or hot water placed in a building such as an apartment building. Specifically, the tube interior cleaning method includes a dry ice generation step S1, a cleaning liquid generation step S2, and a cleaning step S3.
管内洗浄方法によって樹脂管を洗浄するに際し、調査や建物の養生等を行うと共に、必要な資機材を準備する。また、洗浄する樹脂管内の湯水を抜くと共に、樹脂管の必要箇所を開放する。 When cleaning the resin pipe by the pipe cleaning method, conduct surveys, cure the building, etc., and prepare the necessary materials and equipment. In addition, hot water is removed from the resin pipe to be cleaned, and necessary portions of the resin pipe are opened.
ドライアイス生成工程Ｓ１では、液化炭酸ガスのボンベから空気中に炭酸ガスを放出することで、粉状のドライアイスを生成する。これは、液化炭酸ガスのサイフォン付きボンベから空気中に炭酸ガスを液体として放出することで、低温の炭酸ガス（気体）と共に粉状のドライアイス（固体）が生成される性質を利用している。 In the dry ice production step S1, powdery dry ice is produced by releasing carbon dioxide into the air from a liquefied carbon dioxide cylinder. This utilizes the property that low-temperature carbon dioxide (gas) and powdery dry ice (solid) are produced by releasing carbon dioxide as a liquid into the air from a cylinder with a siphon of liquefied carbon dioxide. .
洗浄液生成工程Ｓ２では、エタノール水溶液を冷却することで、粘度が３００ｍＰａ・ｓ以上２００００ｍＰａ・ｓ以下で、つきたての餅のようなドロッとした洗浄液を生成する。この洗浄液生成工程Ｓ２では、エタノール水溶液と粉状のドライアイスとを混合することで、エタノール水溶液を冷却する。 In the cleaning liquid generation step S2, the aqueous ethanol solution is cooled to generate a thick cleaning liquid having a viscosity of 300 mPa·s or more and 20000 mPa·s or less, like a freshly pounded rice cake. In this cleaning liquid generation step S2, the ethanol aqueous solution is cooled by mixing the ethanol aqueous solution and powdery dry ice.
エタノール水溶液は、重量パーセント濃度が３０％以上９０％以下であることが好ましく、また、重量パーセント濃度が３０％以上５０％以下であることがより好ましい。洗浄液の粘度は、３００ｍＰａ・ｓ以上３０００ｍＰａ・ｓ以下であることが好ましく、また、３００ｍＰａ・ｓ以上１０００ｍＰａ・ｓ以下であることがより好ましい。なお、常温２０℃において、卵黄の粘度が３００ｍＰａ・ｓ以上１０００ｍＰａ・ｓ以下程度であり、スキンケアクリームの粘度が１５００ｍＰａ・ｓ以上３０００ｍＰａ・ｓ以下程度であり、はちみつの粘度が８０００ｍＰａ・ｓ以上２００００ｍＰａ・ｓ以下程度である。 The ethanol aqueous solution preferably has a weight percent concentration of 30% or more and 90% or less, more preferably 30% or more and 50% or less. The viscosity of the cleaning liquid is preferably 300 mPa·s or more and 3000 mPa·s or less, and more preferably 300 mPa·s or more and 1000 mPa·s or less. At room temperature of 20° C., the viscosity of egg yolk is about 300 mPa s to 1000 mPa s, the viscosity of skin care cream is about 1500 mPa s to 3000 mPa s, and the viscosity of honey is 8000 mPa s to 20000 mPa s. s or less.
洗浄工程Ｓ３では、圧縮された空気と共に洗浄液を樹脂管に供給する。 In the cleaning step S3, a cleaning liquid is supplied to the resin pipe together with the compressed air.
このような管内洗浄方法によれば、粘度が３００ｍＰａ・ｓ以上２００００ｍＰａ・ｓ以下で、つきたての餅のようなドロッとした洗浄液を用いるので、低粘度でサラッとした洗浄液を用いる場合と比較して、樹脂管の中で洗浄液が滞留する時間が長くなると共に、バイオフィルムを物理的に押し出す力が強くなる。これにより、洗浄能力を高めることができる。 According to such a method for cleaning the inside of pipes, since the viscosity is 300 mPa s or more and 20000 mPa s or less and the cleaning liquid is thick like freshly pounded rice cake, it is compared to the case of using a low viscosity and smooth cleaning liquid. As a result, the length of time that the cleaning liquid stays in the resin pipe increases, and the force that physically pushes out the biofilm increases. Thereby, cleaning ability can be improved.
また、管内洗浄方法によれば、重量パーセント濃度が３０％以上９０％以下であるエタノール水溶液を用いるので、つきたての餅のようなドロッとした洗浄液を容易に生成することができる。 In addition, according to the tube cleaning method, an ethanol aqueous solution having a weight percent concentration of 30% or more and 90% or less is used, so that a thick cleaning liquid like freshly pounded rice cake can be easily generated.
また、管内洗浄方法によれば、エタノール水溶液と粉状のドライアイスとを混合することで、エタノール水溶液を冷却するので、つきたての餅のようなドロッとした洗浄液を容易に生成することができる。 In addition, according to the tube cleaning method, the aqueous ethanol solution is mixed with powdered dry ice to cool the aqueous ethanol solution. can.
また、管内洗浄方法によれば、液化炭酸ガスのボンベから空気中に炭酸ガスを放出することで、粉状のドライアイスを生成するので、粉状のドライアイスを容易に生成することができ、ひいては、つきたての餅のようなドロッとした洗浄液を容易に生成することができる。 In addition, according to the tube cleaning method, powdery dry ice is generated by releasing carbon dioxide gas into the air from a liquefied carbon dioxide gas cylinder, so powdery dry ice can be easily generated. As a result, it is possible to easily generate a thick washing liquid like freshly pounded rice cake.
このように、管内洗浄方法によれば、樹脂管の内表面に形成されているバイオフィルムの除去及び殺菌を行うことができる。 Thus, according to the tube interior cleaning method, biofilms formed on the inner surface of the resin tube can be removed and sterilized.
本発明は、上記実施形態に限られるものではなく、その趣旨及び技術思想を逸脱しない範囲で種々の変形が可能である。すなわち、各構成の数値、数量、用途、手順などは適宜変更できる。例えば、上記実施形態では、樹脂管が給水用又は給湯用である場合を例に説明したが、本発明はこれに限定されず、樹脂管は、水分が影響する設備配管であれば、その用途は限定されない。 The present invention is not limited to the above embodiments, and various modifications are possible without departing from the gist and technical idea of the present invention. That is, the numerical values, quantities, applications, procedures, etc. of each configuration can be changed as appropriate. For example, in the above embodiment, the case where the resin pipe is for water supply or hot water supply has been described as an example, but the present invention is not limited to this, and the resin pipe can be used as long as it is equipment piping that is affected by moisture. is not limited.
Ｓ１ ドライアイス生成工程
Ｓ２ 洗浄液生成工程
Ｓ３ 洗浄工程
S1 Dry ice generation step S2 Cleaning fluid generation step S3 Cleaning step
Claims (4)
圧縮された空気と共に前記洗浄液を樹脂管に供給する洗浄工程と、を備え、
前記洗浄液生成工程では、前記エタノール水溶液と粉状のドライアイスとを混合することで、前記エタノール水溶液を冷却する
管内洗浄方法。 a cleaning liquid generating step of cooling the aqueous ethanol solution to generate a cleaning liquid having a viscosity of 300 mPa·s or more and 20000 mPa·s or less;
a cleaning step of supplying the cleaning liquid to the resin pipe together with the compressed air ,
In the cleaning liquid generating step, the aqueous ethanol solution is mixed with powdery dry ice to cool the aqueous ethanol solution .
請求項１に記載の管内洗浄方法。 The tube interior cleaning method according to claim 1, wherein the aqueous ethanol solution has a weight percent concentration of 30% or more and 90% or less.
請求項１又は２に記載の管内洗浄方法。 3. The method according to claim 1, further comprising a dry ice generating step of generating the powdery dry ice by releasing carbon dioxide from a liquefied carbon dioxide cylinder into the air before the cleaning liquid generating step. In-pipe cleaning method.
請求項１～３のいずれかに記載の管内洗浄方法。 The pipe interior cleaning method according to any one of claims 1 to 3, wherein the resin pipe is for supplying water or hot water.
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| US5526841A (en) * | 1993-08-20 | 1996-06-18 | Detsch; Steven G. | Water line decontamination system |
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| JP2004504868A (en) | 1999-12-17 | 2004-02-19 | プリンストン トレード アンド テクノロジー インコーポレイテッド | Cleaning method of passage using mixed phase flow of gas and liquid |
| JP2007534454A (en) | 2003-06-18 | 2007-11-29 | プリンストン トレード アンド テクノロジー インコーポレイテッド | Apparatus and method for cleaning pipelines, tubes and membranes using a two-phase flow |
| JP2008150461A (en) | 2006-12-15 | 2008-07-03 | T Hasegawa Co Ltd | Viscous detergent used for water-discharging port or pipe |
| JP2019537657A (en) | 2016-09-30 | 2019-12-26 | ノヴァフラックス・インコーポレイテッド | Cleaning and decontamination compositions |
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