JP2004354147A - Residual chlorine concentration measuring method and installation - Google Patents
Residual chlorine concentration measuring method and installation Download PDFInfo
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- JP2004354147A JP2004354147A JP2003150708A JP2003150708A JP2004354147A JP 2004354147 A JP2004354147 A JP 2004354147A JP 2003150708 A JP2003150708 A JP 2003150708A JP 2003150708 A JP2003150708 A JP 2003150708A JP 2004354147 A JP2004354147 A JP 2004354147A
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- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 title claims abstract description 133
- 239000000460 chlorine Substances 0.000 title claims abstract description 133
- 229910052801 chlorine Inorganic materials 0.000 title claims abstract description 133
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000009434 installation Methods 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 111
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000001514 detection method Methods 0.000 claims abstract description 54
- 239000004155 Chlorine dioxide Substances 0.000 claims abstract description 32
- 235000019398 chlorine dioxide Nutrition 0.000 claims abstract description 32
- 238000001914 filtration Methods 0.000 claims abstract description 26
- 238000005259 measurement Methods 0.000 claims abstract description 21
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims description 25
- 239000003795 chemical substances by application Substances 0.000 claims description 24
- 238000007654 immersion Methods 0.000 claims description 16
- 238000000691 measurement method Methods 0.000 claims description 3
- 239000005416 organic matter Substances 0.000 abstract description 19
- 238000012423 maintenance Methods 0.000 abstract description 7
- 239000000645 desinfectant Substances 0.000 description 13
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 239000007864 aqueous solution Substances 0.000 description 5
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical class OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000001590 oxidative effect Effects 0.000 description 5
- 230000001954 sterilising effect Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- VOWOEBADKMXUBU-UHFFFAOYSA-J molecular oxygen;tetrachlorite;hydrate Chemical compound O.O=O.[O-]Cl=O.[O-]Cl=O.[O-]Cl=O.[O-]Cl=O VOWOEBADKMXUBU-UHFFFAOYSA-J 0.000 description 2
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000007973 cyanuric acids Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002070 germicidal effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical class Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 1
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
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- Filtration Of Liquid (AREA)
Abstract
Description
【０００１】
【発明の属する技術分野】
本発明は、水槽と濾過装置とに亘って循環する循環水に塩素計の検出部を浸漬して残留塩素濃度を計測する残留塩素濃度計測方法と、水槽と濾過装置とに亘って循環する循環水に塩素計の検出部を浸漬してある残留塩素濃度計測設備に関する。
【０００２】
【従来の技術】
上記残留塩素濃度計測方法や残留塩素濃度計測設備では、例えば、浴槽やプール，人工池などの水槽と濾過装置とに亘って循環する循環水に塩素計の検出部を浸漬して残留塩素濃度を計測するので、循環水の水垢スライムなどの有機物が検出部に付着堆積し易く、付着堆積した有機物が検出部と循環水との接触を妨げて、計測精度が低下して、残留塩素濃度計測結果が濃度不足側に誤計測する問題がある。
このため、例えば、回転電極ポーラログラフ方式の残留塩素計で計測する場合、ガラスやセラッミク製の多数のビーズ状研磨材を充填してある研磨材充填部に検出用の循環水を流入させるとともに、作用極（検出部） をその研磨材充填部の研磨材に潜り込ませて電動モータなどで駆動回転自在に支持し、作用極の駆動回転で、その作用極を研磨材に擦り付けるなどの機械的手段で有機物を除去して、有機物の作用極への付着堆積を防止している（例えば、特許文献１参照） 。
【０００３】
【特許文献１】
特開２００２−３３３４２７号公報
【０００４】
【発明が解決しようとする課題】
このため、有機物を機械的に除去するための構造が煩雑化するだけでなく、計測精度を高く維持するために、検出部周りの洗浄などの除去装置（機械的手段） のメンテナンスに手間が掛かる欠点がある。
つまり、検出部に付着堆積した有機物を単に除去するだけなので、除去した有機物が検出部近くに溜まると、溜まった有機物による残留塩素の消費に起因して、検出部近くにおける残留塩素濃度が低下し、その結果、実際よりも低い残留塩素濃度を計測することになるので、計測精度を維持するために、除去した有機物が検出部近くに溜まらないように、検出部周りの洗浄などのメンテナンスに手間が掛かるのである。
本発明は上記実情に鑑みてなされたものであって、有機物を除去するための構造が煩雑化せずに、検出部に付着した有機物を簡便に除去でき、計測精度を高く維持するためのメンテナンスの手間も軽減できるようにすることを目的とする。
【０００５】
【課題を解決するための手段】
請求項１記載の発明の特徴構成は、水槽と濾過装置とに亘って循環する循環水に塩素計の検出部を浸漬して残留塩素濃度を計測する残留塩素濃度計測方法であって、前記水槽よりも下流側で、かつ、前記検出部の浸漬箇所よりも上流側の循環水に、二酸化塩素添加用薬剤を投入する点にある。
【０００６】
〔作用及び効果〕
水槽よりも下流側で、かつ、残留塩素計の検出部の浸漬箇所よりも上流側の循環水に、二酸化塩素添加用薬剤を必要に応じて、又は、定期的に投入したり、連続的に投入するので、殺菌力も酸化力も強い二酸化塩素を含む循環水が検出部の浸漬箇所に流入する。
その結果、二酸化塩素添加用薬剤を必要に応じて、又は、定期的に投入する場合は、検出部に付着した有機物を除去でき、また、二酸化塩素添加用薬剤を連続的に投入する場合は、有機物の検出部への付着を防止でき、従来のような有機物を除去するための構造が煩雑化し易い機械的手段を特に使用することなく、また、検出部に付着した有機物が残留塩素を消費しないように、二酸化塩素で有機物を分解して簡便に除去できるとともに、計測精度を高く維持するためのメンテナンスの手間も軽減できる。
【０００７】
請求項２記載の発明の特徴構成は、前記残留塩素計による計測濃度が設定濃度を下回ると、前記二酸化塩素添加用薬剤を投入する点にある。
【０００８】
〔作用及び効果〕
残留塩素計による計測濃度が設定濃度を下回ると、二酸化塩素添加用薬剤を循環水に投入するので、有機物が検出部に付着している結果、計測濃度が設定濃度を下回っている場合は、二酸化塩素添加用薬剤の投入によって実際の残留塩素濃度を精度良く計測できるようになり、二酸化塩素添加用薬剤の循環水への投入にもかかわらず、設定濃度を上回る残留塩素濃度を計測できない場合は、残留塩素濃度が実際に不足していると判断して必要な措置を取ることができる。
【０００９】
請求項３記載の発明の特徴構成は、前記二酸化塩素添加用薬剤を定期的に、または、連続的に投入する点にある。
【００１０】
〔作用及び効果〕
二酸化塩素添加用薬剤を定期的に、または、連続的に循環水に投入するので、僅かな量の投入で塩素計に悪影響を与えることなく、有機物が検出部に付着しないように維持することができる。
【００１１】
請求項４記載の発明の特徴構成は、水槽と濾過装置とに亘る循環路中で、その循環路を循環する循環水に塩素計の検出部を浸漬し、前記水槽よりも下流側で、かつ、前記検出部の浸漬箇所よりも上流側の循環路に、循環水に二酸化塩素添加用薬剤を投入可能な投入部を設けてある点にある。
【００１２】
〔作用及び効果〕
水槽よりも下流側で、かつ、残留塩素計の前記検出部の浸漬箇所よりも上流側の循環路に、循環水に二酸化塩素添加用薬剤を投入可能な投入部を設けてあるので、その投入部から二酸化塩素添加用薬剤を循環水に投入することにより、殺菌力も酸化力も強い二酸化塩素を含む循環水を検出部の浸漬箇所に流入させることができる。
その結果、従来のような有機物を除去するための構造が煩雑化し易い機械的手段を特に設けることなく、また、検出部に付着した有機物が残留塩素を消費しないように、二酸化塩素で有機物を分解して簡便に除去できるとともに、計測精度を高く維持するためのメンテナンスの手間も軽減できる。
【００１３】
請求項５記載の発明の特徴構成は、水槽と濾過装置とに亘って循環する循環水に塩素計の検出部を浸漬してある残留塩素濃度計測設備であって、前記循環水の循環路から前記循環水を取り出す取水路を分岐接続して、前記取水路の取り出し循環水に前記検出部を浸漬するとともに、前記検出部の浸漬箇所よりも上流側の取水路に、循環水に二酸化塩素添加用薬剤を投入可能な投入部を設けてある点にある。
【００１４】
〔作用及び効果〕
循環水の循環路から循環水を取り出す取水路を分岐接続して、取水路の取り出し循環水に検出部を浸漬するとともに、その検出部の浸漬箇所よりも上流側の取水路に、循環水に二酸化塩素添加用薬剤を投入可能な投入部を設けてあるので、有機物を簡便に除去できるとともに、計測精度を高く維持するためのメンテナンスの手間も軽減できるように、二酸化塩素添加用薬剤を効率良く循環水に投入できる。
【００１５】
【発明の実施の形態】
以下に本発明の実施の形態を図面に基づいて説明する。
図１は、浴槽（水槽の一例） １と濾過装置２とを、浴槽水３を濾過装置２に流入させる流入配管４と、濾過装置２を通過した浴槽水３を浴槽１に戻す戻し配管５とで接続して水循環路６を構成し、流入配管４に設けた循環ポンプ７の駆動で、浴槽水３を循環水として、循環水３に含まれる濁質分を濾過装置２で除去しながら、水循環路６に沿って浴槽１と濾過装置２とに亘って循環させる浴槽水循環設備を示す。
【００１６】
そして、殺菌剤注入装置８を設けるとともに、浴槽１と濾過装置２とに亘って循環する循環水３に塩素計９の検出部１０を浸漬してある本発明による残留塩素濃度計測設備Ａを設けて、塩素計９による残留塩素濃度の計測結果に基づく殺菌剤注入装置８の作動で、必要量の殺菌剤を循環水３に注入して、残留塩素濃度を設定濃度範囲に維持できるように構成してある。
【００１７】
前記殺菌剤注入装置８は、塩素系殺菌剤溶液を貯留している殺菌用薬液タンク１１と、殺菌用薬液タンク１１の殺菌剤溶液を注入管１２を通して流入配管４に注入する注入ポンプ１３と、塩素計９による残留塩素濃度の計測結果に基づいて注入ポンプ１３を駆動させる制御装置１４とを設けて、塩素計９が設定濃度範囲の残留塩素濃度を計測するように、必要量の殺菌剤溶液を流入配管４内の循環水３に注入できるように構成してある。
【００１８】
前記残留塩素濃度計測設備Ａは、作用極と対極との一対の電極を検出部１０とする回転電極式或いは隔膜電極式のポーラログラフ電極法やガルバニー電極法による塩素計９を使用して残留塩素濃度を計測するもので、水循環路６から循環水３を取り出す取水路１５を戻し配管５に分岐接続して、その取水路１５の取り出し循環水に検出部１０を浸漬してある。
【００１９】
そして、検出部１０の浸漬箇所よりも上流側の取水路１５に、二酸化塩素添加用薬剤を投入可能な投入部１６を設けて、浴槽１よりも下流側で、かつ、検出部１０の浸漬箇所よりも上流側の循環水３に二酸化塩素添加用薬剤を投入できるように構成してある。
【００２０】
尚、本実施形態では、二酸化塩素添加用薬剤を投入した循環水（取り出し循環水） は、検出部１０の浸漬箇所を通過した後、必要な中和処理などを行って排水するように構成してあるが、検出部１０の浸漬箇所を通過した後、戻し配管５に流入させて循環させるように構成しても良い。
【００２１】
前記投入部１６は、二酸化塩素添加用薬剤としてのテトラクロロデカオキサイド（ＴＣＤＯ） などの変性亜塩素酸塩の水溶液を貯留している二酸化塩素添加用薬液タンク１７と、二酸化塩素添加用薬液タンク１７の変性亜塩素酸塩水溶液を投入管１８を通して取水路１５の取り出し循環水に投入する投入ポンプ１９とを設けて構成してある。
【００２２】
そして、取り出し循環水に塩素計９の検出部１０を浸漬して計測処理部２０により残留塩素濃度を計測するとともに、検出部１０の浸漬箇所よりも上流側の取り出し循環水に変性亜塩素酸塩水溶液を投入する本発明による残留塩素濃度計測方法により、取り出し循環水に添加されている塩素系殺菌剤と変性亜塩素酸塩との［化１］に示す反応によって、幅広いｐＨ値範囲で強い殺菌力（塩素の殺菌効果の約２．６倍） と酸化力（塩素の酸化力の約１０倍） を発揮し、しかも、結合塩素やトリハロメタンなどの有害物質を生成するおそれが少ない二酸化塩素（ＣｌＯ２）を取り出し循環水中に生成して、この二酸化塩素の殺菌力と酸化力で検出部１０に付着堆積している有機物を分解除去できるようにしてある。
【００２３】
【化１】
前記塩素系殺菌剤としては、次亜塩素酸ナトリウムや次亜塩素酸カルシウムなどの無機系次亜塩素酸塩や、塩素化イソシアヌル酸などを使用することができ、また、変性亜塩素酸塩としては、例えば特公平６−１０２５２２号公報に記載されているものを使用することができ、循環水３中での二酸化塩素濃度が０．０１〜０．４ｍｇＣｌＯ２ ／ミリリットルになるように投入するのが望ましい。
【００２５】
〔その他の実施形態〕
１．本発明による残留塩素濃度計測方法は、塩素計による残留塩素の計測濃度が設定濃度を下回ると、二酸化塩素添加用薬剤を投入しても良い。
２．本発明による残留塩素濃度計測方法は、二酸化塩素添加用薬剤を定期的に、または、連続的に投入しても良い。
３．本発明による残留塩素濃度計測方法は、塩素計の検出部を、水槽と濾過装置とに亘る循環路の循環水に浸漬しても、濾過装置よりも上流側の循環水に浸漬しても良い。
４．本発明による残留塩素濃度計測方法は、塩素系殺菌剤を濾過装置よりも下流側の循環水に注入しても良い。
５．本発明による残留塩素濃度計測方法は、水槽と濾過装置とに亘る循環路の循環水に、二酸化塩素添加用薬剤を投入しても良い。
この場合は、検出部だけでなく、二酸化塩素添加用薬剤の投入箇所よりも下流側の循環路への水垢スライムなどの有機物の付着堆積も防止できる。
６．本発明による残留塩素濃度計測方法は、プール，人工池などの水槽と濾過装置とに亘って循環する循環水に塩素計の検出部を浸漬して残留塩素濃度を計測するために使用しても良い。
７．本発明による残留塩素濃度計測設備は、塩素計の検出部を、水槽と濾過装置とに亘る循環路の循環水に浸漬してあっても、濾過装置よりも上流側の循環水に浸漬してあっても良い。
８．本発明による残留塩素濃度計測設備は、水槽と濾過装置とに亘る循環路に、二酸化塩素添加用薬剤を投入可能な投入部を設けてあっても良い。
この場合は、検出部だけでなく、投入部よりも下流側の循環路への水垢スライムなどの有機物の付着堆積も防止できる。
９．本発明による残留塩素濃度計測設備は、人が人為操作で二酸化塩素添加用薬剤を投入可能な投入部を設けてあっても良い。
１０．本発明による残留塩素濃度計測設備は、プール，人工池などの水槽と濾過装置とに亘って循環する循環水に塩素計の検出部を浸漬してあるものでも良い。
１１．本発明による残留塩素濃度計測方法及び残留塩素濃度計測設備は、二酸化塩素添加用薬剤として、安定化二酸化塩素や二酸化塩素の水溶液などを投入するように構成してあっても良い。
【００２６】
【実施例】
図２，図３は、実施形態で示した浴槽水循環設備の残留塩素濃度計測設備Ａを使用して、ポーラログラフ電極法による塩素計９の残留塩素濃度の計測結果に基づいて注入ポンプ１３を駆動させて、塩素計９が設定濃度範囲の残留塩素濃度を計測するように、次亜塩素酸系殺菌剤溶液を循環水３に添加する残留塩素濃度維持運転を実行した場合の、塩素計９による残留塩素濃度の計測濃度Ｂと、浴槽１から採水した浴槽水３の残留塩素濃度をＤＰＤ法によって計測した計測濃度Ｃとの経日変化を示している。
【００２７】
図２は、二酸化塩素添加用薬剤を投入しない場合の経日変化を示し、残留塩素濃度維持運転の開始から数日経過した後、徐々に塩素計９による計測濃度ＢとＤＰＤ法による計測濃度Ｃとに誤差が生じて、ＤＰＤ法による計測濃度Ｃが大きく増加した。
【００２８】
そこで、塩素計９の検出部１０を取り外したところ、電極全体に水垢スライムと見られるぬめりが確認できたために、電極全体を洗浄して、再度、検出部１０を循環水に浸漬し、残留塩素濃度維持運転を再開したが、運転再開から数日経過した後、同様の現象が見られた。
【００２９】
このことから、塩素計９の検出部１０に水垢スライム等の有機物が付着して、塩素計９が実際よりも低い残留塩素濃度を計測し、その計測結果に基づいて注入ポンプ１３を駆動させて、塩素計９が設定濃度範囲の残留塩素濃度を計測するように、殺菌剤溶液を循環水３に過剰に注入し続けたことに起因しているのが分かる。
【００３０】
図３は、特公平６−１０２５２２号公報に示される変性亜塩素酸塩水溶液を二酸化塩素添加用薬剤として、浴槽１内の浴槽水３中での二酸化塩素濃度が０．２ｍｇＣｌＯ２ ／ミリリットルになるように投入しながら、残留塩素濃度維持運転を実行した場合の、塩素計９による残留塩素濃度の計測濃度Ｂと、浴槽１から採水した浴槽水３の残留塩素濃度をＤＰＤ法によって計測した計測濃度Ｃとの経日変化を示している。
【００３１】
図３から、塩素計９による計測濃度ＢとＤＰＤ法による計測濃度Ｃとに大きな差がなくて、残留塩素濃度が安定して維持されており、二酸化塩素添加用薬剤の投入によって、検出部１０への水垢スライムなどの有機物の付着を効果的に防止できていることが分かる。
【図面の簡単な説明】
【図１】浴槽水循環設備の概略図
【図２】二酸化塩素添加用薬剤を投入しない場合の残留塩素濃度の、塩素計による計測濃度と、ＤＰＤ法による計測濃度との経日変化を示すグラフ
【図３】二酸化塩素添加用薬剤を投入した場合の残留塩素濃度の、塩素計による計測濃度と、ＤＰＤ法による計測濃度との経日変化を示すグラフ
【符号の説明】
１ 水槽
２ 濾過装置
３ 循環水
６ 循環路
９ 塩素計
１０ 検出部
１５ 取水路
１６ 投入部
Ｂ 計測濃度[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a residual chlorine concentration measurement method for immersing a detection unit of a chlorine meter in circulating water circulating between a water tank and a filtration device to measure a residual chlorine concentration, and a circulation circulating between the water tank and the filtration device. The present invention relates to a residual chlorine concentration measuring device in which a detection unit of a chlorine meter is immersed in water.
[0002]
[Prior art]
In the above-mentioned residual chlorine concentration measuring method and residual chlorine concentration measuring equipment, for example, the detecting portion of the chlorine meter is immersed in circulating water circulating between a water tank such as a bathtub, a pool, an artificial pond and a filtration device to measure the residual chlorine concentration. Since the measurement is performed, organic matter such as scale slime in the circulating water easily adheres and accumulates on the detector, and the adhered and accumulated organic matter hinders the contact between the detector and the circulating water, lowering the measurement accuracy and measuring the residual chlorine concentration. However, there is a problem that erroneous measurement is performed on the side of insufficient concentration.
For this reason, for example, when measuring with a rotating electrode polarographic residual chlorine meter, circulating water for detection is caused to flow into an abrasive-filled portion filled with a large number of bead-shaped abrasives made of glass or ceramic, and the action is performed. The electrode (detection unit) is sunk into the abrasive in the abrasive filling section and supported rotatably by an electric motor or the like, and the working electrode is rotated by the drive rotation, and the working electrode is rubbed against the abrasive by mechanical means. The organic matter is removed to prevent the organic matter from adhering and depositing on the working electrode (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2002-333427
[Problems to be solved by the invention]
This not only complicates the structure for mechanically removing organic substances, but also requires maintenance of a removal device (mechanical means) such as cleaning around the detection unit in order to maintain high measurement accuracy. There are drawbacks.
In other words, the organic matter attached and deposited on the detection unit is simply removed, and if the removed organic matter accumulates near the detection unit, the residual chlorine concentration near the detection unit decreases due to the consumption of residual chlorine by the accumulated organic matter. As a result, the residual chlorine concentration will be measured lower than the actual measurement.To maintain the measurement accuracy, it is time-consuming to perform maintenance such as cleaning around the detector so that the removed organic matter does not accumulate near the detector. Is hanging.
The present invention has been made in view of the above circumstances, and a structure for easily removing organic substances attached to a detection unit without complicating a structure for removing organic substances, and performing maintenance for maintaining high measurement accuracy. The purpose is to be able to reduce the trouble of
[0005]
[Means for Solving the Problems]
The characteristic configuration of the invention according to claim 1 is a residual chlorine concentration measuring method for measuring a residual chlorine concentration by immersing a detection unit of a chlorine meter in circulating water circulating between a water tank and a filtering device, wherein the water tank is provided. The point is that the chlorine dioxide-adding agent is introduced into the circulating water further downstream than the immersion point of the detection unit.
[0006]
[Action and effect]
As needed, or periodically, the chlorine dioxide addition agent is added to the circulating water downstream of the water tank and upstream of the immersion point of the detection unit of the residual chlorine meter, or continuously. Since the water is supplied, circulating water containing chlorine dioxide, which has a strong bactericidal and oxidizing power, flows into the immersion portion of the detection unit.
As a result, if necessary, or if the chlorine dioxide-adding agent is to be supplied periodically, organic substances attached to the detection unit can be removed, and if the chlorine dioxide-adding agent is to be supplied continuously, Organic substances can be prevented from adhering to the detection unit, and there is no need to particularly use a mechanical means that tends to complicate the structure for removing organic substances as in the past, and the organic substances adhering to the detection unit do not consume residual chlorine. As described above, the organic matter can be easily removed by decomposing it with chlorine dioxide, and the maintenance work for maintaining high measurement accuracy can be reduced.
[0007]
A feature of the invention according to
[0008]
[Action and effect]
If the concentration measured by the residual chlorine meter is lower than the set concentration, the chemical for adding chlorine dioxide is injected into the circulating water.If the measured concentration is lower than the set concentration as a result of organic substances adhering to the detection unit, The actual residual chlorine concentration can be measured accurately with the addition of the chlorine-adding agent.If the residual chlorine concentration exceeding the set concentration cannot be measured despite the introduction of the chlorine dioxide-adding agent into the circulating water, It is possible to determine that the residual chlorine concentration is actually insufficient and take necessary measures.
[0009]
A feature of the invention according to
[0010]
[Action and effect]
The chemical for chlorine dioxide addition is periodically or continuously injected into the circulating water, so that a small amount of injection does not adversely affect the chlorine meter and keeps organic substances from adhering to the detection unit. it can.
[0011]
The characteristic configuration of the invention according to claim 4 is that, in a circulation path extending between the water tank and the filtration device, the detection unit of the chlorine meter is immersed in circulating water circulating in the circulation path, on the downstream side of the water tank, and The present invention is characterized in that an input portion capable of inputting a chlorine dioxide-adding agent into circulating water is provided in a circulation path on the upstream side of the immersion point of the detection portion.
[0012]
[Action and effect]
In the circulation path downstream of the water tank and upstream of the immersion point of the detection unit of the residual chlorine meter, there is provided an introduction section capable of introducing the chlorine dioxide-adding agent into the circulating water. By introducing the chlorine dioxide-adding agent into the circulating water from the section, the circulating water containing chlorine dioxide, which has a strong bactericidal and oxidizing power, can flow into the immersion portion of the detecting section.
As a result, the organic matter is decomposed with chlorine dioxide without providing any mechanical means that tends to complicate the conventional structure for removing organic matter, and so that the organic matter attached to the detection unit does not consume residual chlorine. As well as the maintenance work for maintaining high measurement accuracy can be reduced.
[0013]
A characteristic configuration of the invention according to
[0014]
[Action and effect]
Branch the intake channel that takes out circulating water from the circulating water circulation channel, take out the intake channel, immerse the detection unit in the circulating water, and connect the circulating water to the intake channel upstream of the immersion point of the detection unit. Since the dosing part that can charge the chlorine dioxide-adding agent is provided, the organic matter can be easily removed, and the chlorine-dioxide-adding agent can be efficiently used so that the maintenance work for maintaining high measurement accuracy can be reduced. Can be put into circulating water.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a tub (an example of a water tub) 1 and a
[0016]
Then, a
[0017]
The
[0018]
The residual chlorine concentration measuring equipment A uses a rotating electrode type or diaphragm electrode type polarographic electrode method or a galvanic electrode
[0019]
In the
[0020]
In the present embodiment, the circulating water (withdrawal circulating water) into which the chlorine dioxide-adding agent has been introduced passes through the immersion point of the
[0021]
The charging
[0022]
Then, the
[0023]
Embedded image
As the chlorine-based disinfectant, inorganic hypochlorites such as sodium hypochlorite and calcium hypochlorite, and chlorinated isocyanuric acid can be used. For example, those described in Japanese Patent Publication No. 6-102522 can be used, and the chlorine dioxide in the circulating
[0025]
[Other embodiments]
1. In the method for measuring the concentration of residual chlorine according to the present invention, when the concentration of the residual chlorine measured by the chlorine meter falls below a set concentration, a chemical for adding chlorine dioxide may be introduced.
2. In the method for measuring the concentration of residual chlorine according to the present invention, the chemical for adding chlorine dioxide may be supplied periodically or continuously.
3. In the residual chlorine concentration measurement method according to the present invention, the detection unit of the chlorine meter may be immersed in circulating water in a circulation path extending between the water tank and the filtering device, or may be immersed in circulating water upstream of the filtering device. .
4. In the method for measuring the residual chlorine concentration according to the present invention, the chlorine-based disinfectant may be injected into the circulating water downstream of the filtration device.
5. In the method for measuring the concentration of residual chlorine according to the present invention, a chemical for adding chlorine dioxide may be introduced into circulating water in a circulation path extending between a water tank and a filtering device.
In this case, it is possible to prevent not only the detection unit but also the adhesion and accumulation of organic matter such as water scale slime to the circulation path downstream of the injection point of the chlorine dioxide adding agent.
6. The method for measuring the residual chlorine concentration according to the present invention can also be used to measure the residual chlorine concentration by immersing the detection unit of the chlorine meter in circulating water circulating between a water tank such as a pool or an artificial pond and a filtration device. good.
7. In the residual chlorine concentration measurement equipment according to the present invention, even if the detection unit of the chlorine meter is immersed in the circulating water of the circulation path extending between the water tank and the filtration device, it is immersed in the circulating water upstream of the filtration device. There may be.
8. The residual chlorine concentration measuring equipment according to the present invention may be provided with a charging section capable of charging a chlorine dioxide-adding agent in a circulation path extending between the water tank and the filtering device.
In this case, it is possible to prevent not only the detection unit but also the adhesion and accumulation of organic matter such as scale slime to the circulation path downstream of the charging unit.
9. The residual chlorine concentration measuring equipment according to the present invention may be provided with an input portion into which a human can manually input the chlorine dioxide-adding agent.
10. The residual chlorine concentration measurement equipment according to the present invention may be one in which the detection unit of the chlorine meter is immersed in circulating water circulating between a water tank such as a pool or an artificial pond and a filtration device.
11. The residual chlorine concentration measuring method and the residual chlorine concentration measuring equipment according to the present invention may be configured so that stabilized chlorine dioxide or an aqueous solution of chlorine dioxide or the like is charged as a chlorine dioxide adding agent.
[0026]
【Example】
2 and 3 use the residual chlorine concentration measurement equipment A of the bathtub water circulation equipment shown in the embodiment to drive the
[0027]
FIG. 2 shows the change over time when the chlorine dioxide-adding agent is not added. After several days have elapsed from the start of the operation for maintaining the residual chlorine concentration, the concentration B measured by the
[0028]
Then, when the detecting
[0029]
From this, organic matter such as water scale slime adheres to the
[0030]
FIG. 3 shows that the concentration of chlorine dioxide in the
[0031]
From FIG. 3, there is no large difference between the measured concentration B measured by the
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a bathtub water circulation system. FIG. 2 is a graph showing the change over time between the concentration measured by a chlorine meter and the concentration measured by a DPD method of the residual chlorine concentration when a chemical for adding chlorine dioxide is not charged. FIG. 3 is a graph showing the change over time between the concentration measured by a chlorine meter and the concentration measured by a DPD method of the residual chlorine concentration when a chemical for adding chlorine dioxide is added.
Reference Signs List 1
Claims (5)
前記水槽よりも下流側で、かつ、前記検出部の浸漬箇所よりも上流側の循環水に、二酸化塩素添加用薬剤を投入する残留塩素濃度計測方法。A residual chlorine concentration measurement method for measuring the residual chlorine concentration by immersing a detection unit of a chlorine meter in circulating water circulating through a water tank and a filtration device,
A method for measuring the concentration of residual chlorine, wherein a chemical for adding chlorine dioxide is introduced into circulating water downstream of the water tank and upstream of the immersion point of the detection unit.
前記水槽よりも下流側で、かつ、前記検出部の浸漬箇所よりも上流側の循環路に、循環水に二酸化塩素添加用薬剤を投入可能な投入部を設けてある残留塩素濃度計測設備。In the circulation path between the water tank and the filtration device, the detection unit of the chlorine meter is immersed in circulating water circulating in the circulation path,
Residual chlorine concentration measuring equipment provided with a charging section for charging a chlorine dioxide-adding agent into circulating water in a circulation path downstream of the water tank and upstream of a immersion point of the detection section.
前記循環水の循環路から前記循環水を取り出す取水路を分岐接続して、前記取水路の取り出し循環水に前記検出部を浸漬するとともに、前記検出部の浸漬箇所よりも上流側の取水路に、循環水に二酸化塩素添加用薬剤を投入可能な投入部を設けてある残留塩素濃度計測設備。A residual chlorine concentration measurement facility in which a detection unit of a chlorine meter is immersed in circulating water circulating over a water tank and a filtration device,
Branching and connecting an intake channel for taking out the circulating water from the circulation channel of the circulating water, immersing the detection unit in the circulating water taken out of the intake channel, and in an intake channel upstream of the immersion point of the detection unit. , A residual chlorine concentration measurement facility equipped with an input section that can input a chemical for adding chlorine dioxide to circulating water.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012071357A2 (en) * | 2010-11-22 | 2012-05-31 | Nalco Company | Apparatus for on-line continuous chlorine analysis in turbid water and process streams |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012071357A2 (en) * | 2010-11-22 | 2012-05-31 | Nalco Company | Apparatus for on-line continuous chlorine analysis in turbid water and process streams |
| WO2012071357A3 (en) * | 2010-11-22 | 2012-08-02 | Nalco Company | Apparatus for on-line continuous chlorine analysis in turbid water and process streams |
| CN103221821A (en) * | 2010-11-22 | 2013-07-24 | 纳尔科公司 | Apparatus for on-line continuous chlorine analysis in turbid water and process streams |
| US9016110B2 (en) | 2010-11-22 | 2015-04-28 | Nalco Company | Apparatus for on-line continuous chlorine analysis in turbid water and process streams |
| CN103221821B (en) * | 2010-11-22 | 2016-05-04 | 纳尔科公司 | For the equipment in muddy water and the analysis of process flow on-line continuous chlorine |
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