JP3860248B2 - Method and apparatus for producing sterilizing water - Google Patents

Method and apparatus for producing sterilizing water Download PDF

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JP3860248B2
JP3860248B2 JP11140296A JP11140296A JP3860248B2 JP 3860248 B2 JP3860248 B2 JP 3860248B2 JP 11140296 A JP11140296 A JP 11140296A JP 11140296 A JP11140296 A JP 11140296A JP 3860248 B2 JP3860248 B2 JP 3860248B2
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hydrochloric acid
sodium hypochlorite
water
low concentration
tank
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JPH09295911A (en
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信夫 阿知波
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Hoshizaki Electric Co Ltd
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Hoshizaki Electric Co Ltd
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Description

【０００１】
【発明の属する技術分野】
本発明は、塩素を有効成分とする殺菌水の製造方法、および製造装置に関するものである。
【０００２】
【従来の技術】
塩素を有効成分とする殺菌水は、厨房内、厨房器具等の殺菌処理、野菜、肉等食品類の殺菌処理、病院内、医療器具等の殺菌処理等、広い分野の殺菌処理に利用されている。当該殺菌水を製造する方法としては、例えば、特公平７−８７６８号公報および特開平４−９４７９３号公報に示されている食塩水の有隔膜電解法、特開平５−２３７４７８号公報に示されている食塩水の無隔膜電解法等が知られている。
【０００３】
食塩水の有隔膜電解法では、アノード室内で生成される酸性水が殺菌力を有するもので、この酸性水を殺菌水として直接使用し、またはこの酸性水を水で適宜の濃度に希釈して殺菌水として使用し、またはこの酸性水をアルカリ性水で適宜のｐＨに調整して殺菌水として使用するものである。なお、当該有隔膜電解法においては、印加電流、食塩濃度、食塩水の流速等によってもｐＨ、有効塩素量の調整を行うことができる。
【０００４】
また、食塩水の無隔膜電解法では、被電解水として食塩水にｐＨ調整剤として塩酸、苛性ソーダ等を添加したものを採用して無隔膜電解を行い、ｐＨの調整された電解生成水を殺菌水として使用するものである。
【０００５】
【発明が解決しようとする課題】
ところで、有隔膜電解、無隔膜電解のいずれの食塩水の電解法においても、使用する電解装置が複雑で高価であるとともに、電解室を構成する正負の各電極には寿命があって、電解能力に不安定な面がある。また、使用する原水の水質によっては電解室内にスケールが発生し、スケールを除去するためには正負の各電極の極性を切替る必要があり、その切替時における電解能力が不安定になる。特に、スケールの発生が著しい場合には、原水を軟水化処理するための軟水器の設置が必要となる。
【０００６】
一方、有隔膜電解法においては、アノード室内で強酸性の電解水が生成されるが、この強酸性の電解水が生成される際に、有毒で腐食性の強い塩素ガスが発生する。また、生成される電解水は強酸性であることから腐食性が高く、ｐＨおよび有効塩素量の制御が面倒であり、生成された強酸性の電解水を食品の殺菌処理に直接使用する場合には、食品を変色させるおそれがある。
【０００７】
また、生成される酸性の電解水における有効塩素量を高めるためには、被電解水である食塩水の濃度を高め、印加電流を高め、供給する食塩水の流速を落し、有効塩素量の生成効率の高い電極を使用する等の手段を組み合わせて利用することになるが、これらの制御には複雑な操作が必要になる。
【０００８】
従って、本発明の目的は、塩素を有効成分とする殺菌水を、食塩水の電解によることなく、一般に入手可能な薬品を使用して、安価で安定的に製造することにある。
【０００９】
【課題を解決するための手段】
本発明は殺菌水の製造方法および製造装置に関するもので、本発明に係る殺菌水の製造方法は、法規の規制外の塩酸および次亜塩素酸ソーダを原料として生成する塩素を有効成分とする殺菌水の製造方法であり、原料である塩酸を希釈して所定の低濃度の塩酸を調製するとともに、原料である次亜塩素酸ソーダを希釈して所定の低濃度の次亜塩素酸ソーダを調製し、定流量の水流に前記低濃度の塩酸および低濃度の次亜塩素酸ソーダを定量づつ添加してｐＨ、および有効塩素量を調整することを特徴とするものである。
【００１０】
また、本発明に係る殺菌水の製造装置は、法規の規制外の塩酸および次亜塩素酸ソーダを原料として生成する塩素を有効成分とする殺菌水の製造装置であり、原料である塩酸および次亜塩素酸ソーダをそれぞれ収容する各原料タンクと、低濃度の塩酸および低濃度の次亜塩素酸ソーダをそれぞれ調製する各調製タンクと、前記各原料タンクからの塩酸、次亜塩素酸ソーダ、および水源からの水を前記各調製タンクへそれぞれ一定量供給する供給手段と、前記各調製タンクから調製された低濃度の塩酸および低濃度の次亜塩素酸ソーダを定流量の水流にそれぞれ一定量供給する供給手段を備えていることを特徴とするものである。
【００１１】
本発明において、法規の規制外の塩酸、次亜塩素酸ソーダとは、塩酸にあっては、「毒物および劇物取締り法」で規制される塩酸以外の塩酸で１０重量％以下の低濃度の塩酸を意味し、また次亜塩素酸ソーダにあっては、「労働安全衛生法」で規制される次亜塩素酸ソーダ以外の次亜塩素酸ソーダで固体でない次亜塩素酸ソーダ水溶液を意味する。
【００１２】
【発明の作用・効果】
本発明に係る殺菌水の製造方法によれば、塩素を有効成分とする殺菌水を、一般に入手可能な薬品を使用して安全で、容易にかつ安価に製造することができる。また、使用する塩酸、次亜塩素酸ソーダ等の各薬品をカートリッジ式にして、各薬品のカートリッジを使用済み毎に交換するようにすれば、各薬品の取扱が一層簡便となって、殺菌水の製造が一層容易となる。当該殺菌水は、本発明に係る製造装置を使用すれば、効率よく製造することができる。
【００１３】
【発明の実施の形態】
以下、本発明を図面に基づいて説明するに、図１は本発明に係る殺菌水の製造装置の一例を示す概略図であり、当該製造装置１０は、塩酸の原液タンクである第１原液タンク１１ａ、次亜塩素酸ソーダの原液タンクである第２原液タンク１１ｂ、低濃度の塩酸の調製タンクである第１調製タンク１２ａ、低濃度の次亜塩素酸ソーダの調製タンクである第２調製タンク１２ｂ、貯水タンク１３、および制御装置１４を備えている。
【００１４】
第１原液タンク１１ａは塩酸を収容するカートリッジ式のものであり、また第２原液タンク１１ｂは次亜塩素酸ソーダの水溶液を収容するカートリッジ式のものであり、各薬液を消費した場合にはこれら各薬品を収容する他のタンクと交換可能になっている。
【００１５】
第１原液タンク１１ａは、接続管路１５ａを介して第１調製タンク１２ａに接続され、第１調製タンク１２ａは、接続管路１５ｂを介して主管路１６ａに接続されているとともに、水道水の供給管路１６ｂに接続されている。第２原液タンク１１ｂは、接続管路１５ｃを介して第２調製タンク１２ｂに接続され、第２調製タンク１２ｂは、接続管路１５ｄを介して主管路１６ａに接続されているとともに、水道水の供給管路１６ｃに接続されている。貯水タンク１３は、水道水の供給管路１６ｄに接続されているとともに、主管路１６ａに接続されている。
【００１６】
各接続管路１５ａ，１５ｃ、および各水供給管路１６ｂ，１６ｃ，１６ｄには開閉バルブ１７ａ，１７ｂ，１７ｃ，１７ｄ，１７ｅが介装されているとともに、各接続管路１５ｂ，１５ｄには定量バルブ１７ｆ，１７ｇが介装され、かつ主管路１６ａには流量調節バルブ１７ｈと、送水ポンプ１８ａが介装されている。
【００１７】
なお、図中の符号１２ｃ，１８ｂは第１調製タンク１２ａのフロートスイッチ、および撹拌ポンプを示し、同様に、符号１２ｄ，１８ｃは第２調製タンク１２ｂのフロートスイッチ、および撹拌ポンプを示している。
【００１８】
当該製造装置１０においては、各フロートスイッチ１２ｃ，１２ｄ、各開閉バルブ１７ａ〜１７ｅ、各定量バルブ１７ｆ，１７ｇ、流量調節バルブ１７ｆの作動、各ポンプ１８ａ〜１８ｃの駆動は、全て制御装置１４にて制御される。
【００１９】
当該製造装置１０を使用して殺菌水を製造するには、各フロートスイッチ１２ｃ，１２ｄを作動して各開閉バルブ１７ｃ，１７ｄを開放して、第１，第２調製タンク１２ａ，１２ｂに一定量の水を供給するとともに、各開閉バルブ１７ａ，１７ｂを開放して各調製タンク１２ａ，１２ｂに一定量の塩酸、次亜塩素酸ソーダを供給し、撹拌ポンプ１８ｂ，１８ｃを駆動させて均一に撹拌して、第１調製タンク１２ａ内では一定の低濃度の塩酸を調製し、第２調製タンク１２ｂでは一定の低濃度の次亜塩素酸ソーダ水溶液を調製する。
【００２０】
これらの調製時には、各開閉バルブ１７ａ〜１７ｄは制御装置１４により開閉制御され、第１調製タンク１２ａには一定の低濃度の塩酸の一定量を常に貯留させ、また第２調製タンク１２ｂには一定の低濃度の次亜塩素酸ソーダ水溶液の一定量を常に貯留させておく。
【００２１】
一方、貯水タンク１３には、常時水が一定量貯留させておき、送水ポンプ１８ａの駆動により流量調節バルブ１７ｈを通して主管路１６ａに一定流量の水を流動させ、この一定流量の水流中に、第１調製タンク１２ａからは一定の低濃度塩酸を定量バルブ１７ｆを通して供給し、かつ第２調製タンク１２ｂからは一定の低濃度次亜塩素酸ソーダ水溶液を定量バルブ１７ｇを通して供給する。これにより、主管路１６ａ内では水と、低濃度塩酸と、低濃度次亜塩素酸ソーダ水溶液とが混合され、次亜塩素酸を主成分とする殺菌水が生成される。
【００２２】
なお、生成される殺菌水のｐＨ、および有効塩素量は各調製タンク１２ａ，１２ｂで調製される低濃度塩酸、低濃度次亜塩素酸ソーダ水溶液の濃度、これらの低濃度の塩酸、低濃度次亜塩素酸ソーダ水溶液の主管路１６ａへの供給量、および主管路１６ａの水の流量にて決定され、予めこれらの値を設定して制御装置１４にて制御する。
【００２３】
当該製造装置１０を使用して殺菌水を製造する実験では、塩酸の原料として一般に入手可能な１０重量％の濃度の塩酸を収容したカートリッジを採用するとともに、次亜塩素酸ソーダの原料として一般に入手可能な１２重量％の濃度の次亜塩素酸ソーダ水溶液を収容したカートリッジを採用して行い、各カートリッジの薬液が消費された場合には、各カートリッジをその都度交換して実験を続行した。
【００２４】
また、本実験では、調製された低濃度塩酸および低濃度次亜塩素酸ソーダ水溶液の濃度、主管路への供給量、主管路での水の流量と、殺菌水のｐＨ、有効塩素量の関係を予め測定しておく。これらの関係の一例を表１に示す。但し、同表に示す値は、主管路での水の流量を５０００ｃｃ／ｍｉｎ、低濃度塩酸の濃度を０．１重量％、低濃度次亜塩素酸ソーダ水溶液の濃度を０．００１重量％に設定した場合の値である。
【００２５】
【表１】

Figure 0003860248
【００２６】
なお、当該製造装置１０は、ｐＨセンサー、有効塩素センサーを使用してフィードバック制御するものではない低コスト型のものであるため、ｐＨの設定値に対して殺菌水のｐＨ値には所定の幅がある。
【００２７】
図２には、本発明に係る殺菌水の製造装置の他の一例が示されている。当該製造装置２０は、ｐＨセンサーおよび有効塩素センサーを使用してフィードバック制御する高精度型のものであり、基本構成は製造装置１０と同一であるが、低濃度塩酸を調製する第１調製タンク２２ａ、および主管路２６ａにはｐＨセンサー２９ａ，２９ｂが配設され、また低濃度次亜塩素酸ソーダ水溶液を調製する第２調製タンク２２ｂ、および主管路２６ａには有効塩素センサー２９ｃ，２９ｄが配設され、さらには主管路２６ａにはミキサー２９ｅが配設されている。
【００２８】
なお、その他の構成については製造装置１０と同一であるため、同一の構成部材、および同一の構成部位については、２０番台の類似の符号を付してその詳細な説明を省略する。
【００２９】
当該製造装置２０においては、第１調製タンク２２ａ内の低濃度塩酸のｐＨ値をｐＨセンサー２９ａにて検出して、同低濃度塩酸のｐＨを設定された一定値となるように開閉バルブ２７ａを制御し、また第２調製タンク２２ｂ内の低濃度次亜塩素酸水溶液の有効塩素値を有効塩素センサー２９ｃにて検出して、同低濃度水溶液の有効塩素量を設定された一定値となるように開閉バルブ２７ｂを制御する。
【００３０】
一方、主管路２６ａにおいては、主管路２６ａ内を流れる水、供給された低濃度塩酸、および低濃度次亜塩素酸ソーダ水溶液をミキサー２９ｅにて均一に混合し、ｐＨセンサー２９ｂおよび有効塩素センサー２９ｄにて混合された水溶液のｐＨ値、有効塩素量を検出し、水溶液中のｐＨ値、有効塩素量が設定された一定値となるように各定量バルブ２７ｆ，２７ｇを制御する。
【００３１】
これにより、当該製造装置２０においては、製造装置１０を使用した場合に比較して、製造される殺菌水のｐＨ値、および有効塩素量を設定値に精度よく一致させることができる。
【図面の簡単な説明】
【図１】本発明に係る製造装置の一例を示す概略構成図である。
【図２】本発明に係る製造装置の他の一例を示す概略構成図である。
【符号の説明】
１０，２０…製造装置、１１ａ，２１ａ…第１原液タンク、１１ｂ，２１ｂ…第２原液タンク、１２ａ，２２ａ…第１調製タンク、１２ｂ，２２ｂ…第２調製タンク、１３，２３…貯水タンク、１４，２４…制御装置、１６ａ，２６ａ…主管路、１７ａ〜１７ｅ，２７ａ〜２７ｅ…開閉バルブ、１７ｆ，１７ｇ，２７ｆ，２７ｇ…定量バルブ、１７ｈ，２７ｈ…流量調節バルブ、１８ａ，２８ａ…送水ポンプ、２９ａ，２９ｂ…ｐＨセンサー、２９ｃ，２９ｄ…有効塩素センサー、２９ｅ…ミキサー。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing sterilizing water containing chlorine as an active ingredient, and a production apparatus.
[0002]
[Prior art]
Bactericidal water containing chlorine as an active ingredient is used for sterilization treatment in a wide range of fields, including sterilization treatment in kitchens, kitchen utensils, etc., sterilization treatment of foods such as vegetables and meat, sterilization treatment in hospitals, medical instruments, etc. Yes. Examples of the method for producing the sterilizing water include the diaphragm membrane electrolysis method shown in JP-B-7-8768 and JP-A-4-94793, and JP-A-5-237478. The saline electrolysis method of saline is known.
[0003]
In the saline membrane electrolysis method, acidic water produced in the anode chamber has sterilizing power, and this acidic water is used directly as sterilizing water, or this acidic water is diluted with water to an appropriate concentration. It is used as sterilizing water, or this acidic water is adjusted to an appropriate pH with alkaline water and used as sterilizing water. In the diaphragm electrolysis method, the pH and effective chlorine amount can be adjusted by the applied current, the salt concentration, the flow rate of the saline solution, and the like.
[0004]
In addition, the saline membrane electrolysis method employs a saline solution to which salt water is added with hydrochloric acid, caustic soda and the like as electrolyzed water, and performs electrolysis of the diaphragm to sterilize the pH-adjusted electrolytically generated water. It is used as water.
[0005]
[Problems to be solved by the invention]
By the way, in both the diaphragm electrolysis method and the diaphragm electrolysis method, the electrolysis apparatus to be used is complicated and expensive, and the positive and negative electrodes constituting the electrolysis chamber have a lifetime, and the electrolysis ability Have unstable surfaces. Further, depending on the quality of raw water used, a scale is generated in the electrolytic chamber, and in order to remove the scale, it is necessary to switch the polarity of the positive and negative electrodes, and the electrolysis ability at the time of switching becomes unstable. In particular, when the occurrence of scale is significant, it is necessary to install a water softener for softening raw water.
[0006]
On the other hand, in the diaphragm membrane electrolysis method, strongly acidic electrolyzed water is generated in the anode chamber. When this strongly acidic electrolyzed water is generated, toxic and highly corrosive chlorine gas is generated. In addition, since the generated electrolyzed water is highly acidic, it is highly corrosive, and it is troublesome to control the pH and the amount of effective chlorine. When the generated strongly acidic electrolyzed water is used directly for sterilization of foods, May discolor the food.
[0007]
In addition, in order to increase the amount of effective chlorine in the acidic electrolyzed water that is generated, the concentration of saline solution, which is the electrolyzed water, is increased, the applied current is increased, the flow rate of the supplied saline solution is decreased, and the effective chlorine amount is generated. A combination of means such as using highly efficient electrodes is used, but these controls require complicated operations.
[0008]
Accordingly, an object of the present invention is to stably and inexpensively produce sterilizing water containing chlorine as an active ingredient, by using generally available chemicals without using electrolysis of saline solution.
[0009]
[Means for Solving the Problems]
TECHNICAL FIELD The present invention relates to a method and apparatus for producing sterilizing water, and the method for producing sterilizing water according to the present invention includes sterilization using as an active ingredient chlorine produced from hydrochloric acid and sodium hypochlorite that are not regulated by law. This is a method for producing water, diluting hydrochloric acid, which is a raw material, to prepare a predetermined low concentration hydrochloric acid, and diluting sodium hypochlorite, which is a raw material, to prepare a predetermined low concentration sodium hypochlorite. The low-concentration hydrochloric acid and the low-concentration sodium hypochlorite are added in a constant amount to the water flow at a constant flow rate to adjust the pH and the effective chlorine amount.
[0010]
The sterilizing water manufacturing apparatus according to the present invention is a sterilizing water manufacturing apparatus containing, as an active ingredient, hydrochloric acid and sodium hypochlorite, which are not regulated by law. Each raw material tank for respectively containing sodium chlorite, each preparation tank for preparing low concentration hydrochloric acid and low concentration sodium hypochlorite, respectively, hydrochloric acid from each raw material tank, sodium hypochlorite, and Supply means for supplying a fixed amount of water from a water source to each of the preparation tanks, and supplying a fixed amount of low-concentration hydrochloric acid and low-concentration sodium hypochlorite prepared from each of the preparation tanks to a constant-flow water stream. It is characterized by providing the supply means.
[0011]
In the present invention, hydrochloric acid and sodium hypochlorite that are not regulated by the law are hydrochloric acid other than hydrochloric acid regulated by the “Poisonous and Deleterious Substances Control Law” and a low concentration of 10% by weight or less. It means hydrochloric acid, and in the case of sodium hypochlorite, it means a sodium hypochlorite aqueous solution that is not solid with sodium hypochlorite other than sodium hypochlorite regulated by the Occupational Safety and Health Act. .
[0012]
[Operation and effect of the invention]
According to the method for producing sterilized water according to the present invention, sterilized water containing chlorine as an active ingredient can be produced safely, easily and inexpensively using generally available chemicals. In addition, if each chemical such as hydrochloric acid and sodium hypochlorite is used as a cartridge, and each chemical cartridge is replaced every time it is used, the handling of each chemical becomes easier and sterilization water Is easier to manufacture. The sterilizing water can be efficiently manufactured by using the manufacturing apparatus according to the present invention.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a schematic view showing an example of a sterilizing water manufacturing apparatus according to the present invention. The manufacturing apparatus 10 is a first stock solution tank which is a hydrochloric acid stock solution tank. 11a, second stock solution tank 11b which is a stock solution tank of sodium hypochlorite, first preparation tank 12a which is a preparation tank of low concentration hydrochloric acid, and second preparation tank which is a preparation tank of low concentration sodium hypochlorite 12b, a water storage tank 13, and a control device 14.
[0014]
The first stock solution tank 11a is of a cartridge type that contains hydrochloric acid, and the second stock solution tank 11b is of a cartridge type that contains an aqueous solution of sodium hypochlorite. It can be exchanged with other tanks that contain each medicine.
[0015]
The first stock solution tank 11a is connected to the first preparation tank 12a via the connection line 15a, and the first preparation tank 12a is connected to the main line 16a via the connection line 15b and tap water. It is connected to the supply pipeline 16b. The second stock solution tank 11b is connected to the second preparation tank 12b via the connection line 15c, and the second preparation tank 12b is connected to the main line 16a via the connection line 15d, and tap water. It is connected to the supply line 16c. The water storage tank 13 is connected to the tap water supply pipe 16d and to the main pipe 16a.
[0016]
Open / close valves 17a, 17b, 17c, 17d, and 17e are interposed in the connection pipes 15a and 15c and the water supply pipes 16b, 16c, and 16d, and fixed amounts are provided in the connection pipes 15b and 15d. Valves 17f and 17g are interposed, and a flow rate adjusting valve 17h and a water pump 18a are interposed in the main pipeline 16a.
[0017]
In addition, the code | symbols 12c and 18b in a figure show the float switch and stirring pump of the 1st preparation tank 12a, and similarly the code | symbols 12d and 18c show the float switch and stirring pump of the 2nd preparation tank 12b.
[0018]
In the manufacturing apparatus 10, the float switches 12 c and 12 d, the open / close valves 17 a to 17 e, the metering valves 17 f and 17 g, the operation of the flow rate adjusting valve 17 f, and the driving of the pumps 18 a to 18 c are all performed by the control device 14. Be controlled.
[0019]
In order to manufacture sterilizing water using the manufacturing apparatus 10, the float switches 12c and 12d are operated to open the on-off valves 17c and 17d, and a certain amount is supplied to the first and second preparation tanks 12a and 12b. In addition to supplying water, the open / close valves 17a and 17b are opened to supply a certain amount of hydrochloric acid and sodium hypochlorite to the preparation tanks 12a and 12b, and the stirring pumps 18b and 18c are driven to uniformly stir. Then, a constant low concentration hydrochloric acid is prepared in the first preparation tank 12a, and a constant low concentration sodium hypochlorite aqueous solution is prepared in the second preparation tank 12b.
[0020]
During these preparations, the open / close valves 17a to 17d are controlled to open and close by the control device 14, and a constant amount of hydrochloric acid having a constant low concentration is always stored in the first preparation tank 12a, and a constant amount is stored in the second preparation tank 12b. A certain amount of low concentration sodium hypochlorite aqueous solution is always stored.
[0021]
On the other hand, a constant amount of water is always stored in the water storage tank 13, and a constant flow rate of water is caused to flow through the main flow line 16a through the flow rate adjustment valve 17h by driving the water supply pump 18a. A constant low concentration hydrochloric acid is supplied from the first preparation tank 12a through the metering valve 17f, and a constant low concentration sodium hypochlorite aqueous solution is supplied from the second preparation tank 12b through the metering valve 17g. As a result, water, low-concentration hydrochloric acid, and low-concentration sodium hypochlorite aqueous solution are mixed in the main pipeline 16a, and sterilized water mainly containing hypochlorous acid is generated.
[0022]
The pH of the sterilized water produced and the amount of effective chlorine are low concentration hydrochloric acid and low concentration sodium hypochlorite aqueous solution prepared in each of the preparation tanks 12a and 12b. The amount of sodium chlorite aqueous solution supplied to the main pipeline 16a and the flow rate of water in the main pipeline 16a are determined, and these values are set in advance and controlled by the controller 14.
[0023]
In an experiment for producing sterilized water using the production apparatus 10, a cartridge containing hydrochloric acid having a concentration of 10% by weight that is generally available as a raw material for hydrochloric acid is adopted, and generally obtained as a raw material for sodium hypochlorite. A cartridge containing a sodium hypochlorite aqueous solution having a possible concentration of 12% by weight was employed. When the chemical solution of each cartridge was consumed, the cartridge was replaced each time and the experiment was continued.
[0024]
In this experiment, the relationship between the concentration of the prepared low-concentration hydrochloric acid and low-concentration sodium hypochlorite aqueous solution, the amount supplied to the main pipeline, the flow rate of water in the main pipeline, the pH of the sterilizing water, and the effective chlorine content Is measured in advance. An example of these relationships is shown in Table 1. However, the values shown in the table are as follows: the flow rate of water in the main pipeline is 5000 cc / min, the concentration of low-concentration hydrochloric acid is 0.1% by weight, and the concentration of low-concentration sodium hypochlorite aqueous solution is 0.001% by weight. This is the value when set.
[0025]
[Table 1]
Figure 0003860248
[0026]
Since the manufacturing apparatus 10 is a low-cost type that does not perform feedback control using a pH sensor or an effective chlorine sensor, the pH value of the sterilizing water has a predetermined range with respect to the set value of pH. There is.
[0027]
FIG. 2 shows another example of the sterilizing water production apparatus according to the present invention. The manufacturing apparatus 20 is a high-precision type that performs feedback control using a pH sensor and an effective chlorine sensor. The basic configuration is the same as that of the manufacturing apparatus 10, but a first preparation tank 22a that prepares low-concentration hydrochloric acid. PH sensors 29a and 29b are disposed in the main pipeline 26a, and effective chlorine sensors 29c and 29d are disposed in the second preparation tank 22b for preparing the low concentration sodium hypochlorite aqueous solution and the main pipeline 26a. Furthermore, a mixer 29e is disposed in the main pipeline 26a.
[0028]
In addition, since it is the same as that of the manufacturing apparatus 10 about another structure, about the same structural member and the same structural site | part, the 20th order similar code | symbol is attached | subjected and the detailed description is abbreviate | omitted.
[0029]
In the manufacturing apparatus 20, the pH value of the low concentration hydrochloric acid in the first preparation tank 22a is detected by the pH sensor 29a, and the open / close valve 27a is set so that the pH of the low concentration hydrochloric acid becomes a set constant value. The effective chlorine value of the low concentration hypochlorous acid aqueous solution in the second preparation tank 22b is detected by the effective chlorine sensor 29c so that the effective chlorine amount of the low concentration aqueous solution becomes a set constant value. The on-off valve 27b is controlled.
[0030]
On the other hand, in the main pipeline 26a, the water flowing in the main pipeline 26a, the supplied low concentration hydrochloric acid, and the low concentration sodium hypochlorite aqueous solution are uniformly mixed by the mixer 29e, and the pH sensor 29b and the effective chlorine sensor 29d are mixed. The pH value and the effective chlorine amount of the aqueous solution mixed in (1) are detected, and the respective metering valves 27f and 27g are controlled so that the pH value and the effective chlorine amount in the aqueous solution become a set constant value.
[0031]
Thereby, in the said manufacturing apparatus 20, compared with the case where the manufacturing apparatus 10 is used, the pH value of the sterilization water manufactured and the amount of available chlorine can be made to correspond with a setting value with a sufficient precision.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an example of a manufacturing apparatus according to the present invention.
FIG. 2 is a schematic configuration diagram showing another example of the manufacturing apparatus according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10,20 ... Manufacturing apparatus, 11a, 21a ... 1st stock solution tank, 11b, 21b ... 2nd stock solution tank, 12a, 22a ... 1st preparation tank, 12b, 22b ... 2nd preparation tank, 13, 23 ... Water storage tank, 14, 24 ... Control device, 16a, 26a ... Main pipeline, 17a-17e, 27a-27e ... Open / close valve, 17f, 17g, 27f, 27g ... Metering valve, 17h, 27h ... Flow control valve, 18a, 28a ... Water pump 29a, 29b ... pH sensor, 29c, 29d ... effective chlorine sensor, 29e ... mixer.

Claims (2)

法規の規制外の塩酸および次亜塩素酸ソーダを原料として生成する塩素を有効成分とする殺菌水の製造方法であり、原料である塩酸を希釈して所定の低濃度の塩酸を調製するとともに、原料である次亜塩素酸ソーダを希釈して所定の低濃度の次亜塩素酸ソーダを調製し、定流量の水流に前記低濃度の塩酸および低濃度の次亜塩素酸ソーダを定量づつ添加してｐＨ、および有効塩素量を調整することを特徴とする殺菌水の製造方法。It is a method for producing sterilizing water containing as an active ingredient hydrochloric acid produced from hydrochloric acid and sodium hypochlorite that are not regulated by law, and dilute hydrochloric acid as a raw material to prepare a predetermined low concentration hydrochloric acid, The raw material sodium hypochlorite is diluted to prepare a predetermined low concentration sodium hypochlorite, and the low concentration hydrochloric acid and the low concentration sodium hypochlorite are added in a constant flow rate to the water flow at a constant rate. And adjusting the pH and the amount of effective chlorine. 法規の規制外の塩酸および次亜塩素酸ソーダを原料として生成する塩素を有効成分とする殺菌水の製造装置であり、原料である塩酸および次亜塩素酸ソーダをそれぞれ収容する各原料タンクと、低濃度の塩酸および低濃度の次亜塩素酸ソーダをそれぞれ調製する各調製タンクと、前記各原料タンクからの塩酸、次亜塩素酸ソーダ、および水源からの水を前記各調製タンクへそれぞれ一定量供給する供給手段と、前記各調製タンクから調製された低濃度の塩酸および低濃度の次亜塩素酸ソーダを定流量の水流にそれぞれ一定量供給する供給手段を備えていることを特徴とする殺菌水の製造装置。It is an apparatus for producing sterilizing water containing hydrochloric acid and sodium hypochlorite, which are not regulated by laws and regulations, as active ingredients, and each raw material tank that contains hydrochloric acid and sodium hypochlorite as raw materials, Each preparation tank for preparing low-concentration hydrochloric acid and low-concentration sodium hypochlorite, and a fixed amount of hydrochloric acid, sodium hypochlorite, and water from each source tank to each preparation tank. Disinfection characterized by comprising supply means for supplying and supply means for supplying a constant amount of low concentration hydrochloric acid and low concentration sodium hypochlorite prepared from each preparation tank to a constant flow rate water flow Water production equipment.
JP11140296A 1996-05-02 1996-05-02 Method and apparatus for producing sterilizing water Expired - Fee Related JP3860248B2 (en)

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