JP4195435B2 - Sterilizing water production apparatus and chemical injection valve used therefor - Google Patents
Sterilizing water production apparatus and chemical injection valve used therefor Download PDFInfo
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Description
本発明は、原水中に必要な薬液を注入して次亜塩素酸水溶液などの殺菌水を製造する装置及びそれに用いられる薬液注入弁に関する。 The present invention relates to an apparatus for injecting a necessary chemical solution into raw water to produce sterilizing water such as a hypochlorous acid aqueous solution, and a chemical solution injection valve used therefor .
従来、医療、介護、食品加工などの分野において、消毒・殺菌用として次亜塩素酸、濃塩酸水、過酸化水素水、過酢酸水などの殺菌作用を有する薬剤を水に注入して調製した殺菌水が使用されている。
代表的な殺菌水である次亜塩素酸を水に溶解させた殺菌水は、通常、配管中に供給される原水中に次亜塩素酸ナトリウムの水溶液と塩酸、硫酸などの酸性水溶液を供給し、配管内で次亜塩素酸を発生させることによって製造されている（特許文献１参照）。
Conventionally, in the fields of medical care, nursing care, food processing, etc., it was prepared by injecting water with a sterilizing agent such as hypochlorous acid, concentrated hydrochloric acid water, hydrogen peroxide water, peracetic acid water for disinfection and sterilization. Sterilized water is used.
Sterilized water in which hypochlorous acid, which is typical sterilized water, is dissolved in water is usually supplied with an aqueous solution of sodium hypochlorite and an acidic aqueous solution such as hydrochloric acid or sulfuric acid in the raw water supplied to the pipe. It is manufactured by generating hypochlorous acid in the pipe (see Patent Document 1).
次亜塩素酸を水に溶解させた殺菌水（以下、次亜塩素酸殺菌水と記載する）の製造装置の概略系統図を図３に示す。この装置は原水配管１０１に設けられた混合部１０２において、原水配管１０１内に供給される水道水などの原水１０３に次亜塩素酸ナトリウムの水溶液と塩酸を注入して混合し、次亜塩素酸殺菌水１０４を製造するものである。図中の１０５は流量計である。この装置には、混合部２で原水配管１に薬液を注入するための薬液注入システムが２系列設けられている。 FIG. 3 shows a schematic system diagram of an apparatus for producing sterilized water in which hypochlorous acid is dissolved in water (hereinafter referred to as hypochlorous acid sterilized water). In this apparatus, in a mixing unit 102 provided in the raw water pipe 101, an aqueous solution of sodium hypochlorite and hydrochloric acid are injected and mixed into raw water 103 such as tap water supplied into the raw water pipe 101, and hypochlorous acid is mixed. The sterilizing water 104 is manufactured. In the figure, 105 is a flow meter. This apparatus is provided with two series of chemical liquid injection systems for injecting chemical liquid into the raw water pipe 1 in the mixing section 2.
次亜塩素酸ナトリウム水溶液は次亜塩素酸ナトリウム水溶液を貯留する薬液タンク１０７−１、配管１０８−１、ポンプ１０９−１、配管１１０−１、薬液注入弁１１１−１、制御装置１１３を備えた薬液注入システム１０６−１から原水配管１０１に注入され、また、塩酸は塩酸を貯留する薬液タンク１０７−２、配管１０８−２、ポンプ１０９−２、配管１１０−２、薬液注入弁１１１−２、制御装置１１２を備えた薬液注入システム１０６−２から原水配管１０１に注入され、原水配管１０１中に供給される原水中で混合されて反応し次亜塩素酸を有効成分とする殺菌水が製造される。次亜塩素酸ナトリウム水溶液及び塩酸の注入量は、制御装置１１２によって、殺菌水１０４の品質設定値と測定される原水流量Ｔに基づいて計算された値に基づいてポンプ１０９−１及び１０９−２の吐出量を制御することにより調整される。 The sodium hypochlorite aqueous solution was provided with a chemical tank 107-1 for storing the sodium hypochlorite aqueous solution, a pipe 108-1, a pump 109-1, a pipe 110-1, a chemical injection valve 111-1, and a control device 113. The chemical liquid injection system 106-1 is injected into the raw water pipe 101, and hydrochloric acid is stored in the chemical tank 107-2, the pipe 108-2, the pump 109-2, the pipe 110-2, the chemical liquid injection valve 111-2, and the hydrochloric acid. Bactericidal water containing hypochlorous acid as an active ingredient is produced by being injected into the raw water pipe 101 from the chemical liquid injection system 106-2 provided with the control device 112, mixed and reacted in the raw water supplied into the raw water pipe 101. The The injection amount of the sodium hypochlorite aqueous solution and hydrochloric acid is determined based on the values calculated by the control device 112 based on the quality setting value of the sterilizing water 104 and the raw water flow rate T measured. It is adjusted by controlling the discharge amount.
前記のような構成の装置により次亜塩素酸殺菌水を製造する場合、薬液（特に次亜塩素酸ナトリウム水溶液）の注入経路内に気泡が発生しやすく、この気泡が薬液注入用のポンプ１０９−１及び１０９−２の動作に悪影響を及ぼすという問題がある。ポンプの動作は制御装置１１３に接続した制御回路からのパルス数によって制御されているが、気泡により１パルス当たりの吐出量が変動する。そのため薬液の注入量が変化するので、殺菌水の濃度が変動することとなる。
さらに気泡が多量に発生すると、ポンプは空回り状態となり薬液の注入が停止する。従来の装置はこの空回り状態を回避するために複雑な泡除去装置を付加し、一定時間ごとに自動的泡除去工程を挿入する必要があり、この工程のトラブルが多発していた。
In the case of producing hypochlorous acid sterilizing water by the apparatus having the above-described structure, bubbles are likely to be generated in the injection path of the chemical solution (particularly, sodium hypochlorite aqueous solution), and these bubbles are generated by the chemical solution injection pump 109-. There is a problem of adversely affecting the operations of 1 and 109-2. The operation of the pump is controlled by the number of pulses from a control circuit connected to the control device 113, but the discharge amount per pulse varies due to bubbles. Therefore, since the injection amount of the chemical solution changes, the concentration of the sterilizing water varies.
Further, when a large amount of bubbles are generated, the pump becomes idle and the injection of the chemical solution is stopped. In order to avoid this idling state, the conventional apparatus needs to add a complicated bubble removing device and insert an automatic bubble removing step every certain time, and troubles in this step frequently occur.
また、従来の装置では薬液注入弁１１１−１及び１１１−２としてバネにより開閉する逆止機構を備えた弁が使用されている。このような弁の１例の概略説明図を図４に示す。図４の薬液注入弁１１５は、薬液注入用のポンプが作動中は原水側に比較して薬液供給管１１６側の圧力が高くなるので、閉子１１７が押されてバネ１２０が縮み閉子ホルダ１１８との間に隙間１１９ができ、この隙間を通って薬液が原水配管１０１中に注入され、薬液注入用のポンプが停止したときにはバネ１２０により閉子１１７が閉子ホルダ１１８に押しつけられ隙間１１９が閉鎖され、薬液の注入が止まるようになっている。１２５はシールのための弾性Ｏリングである。このような薬液注入弁の場合、原理的には原水側の圧力変化に依存しない吐出量が得られるが、実際にこの種の薬液注入弁を使用すると、原水側の圧力が減少すると吐出量は増加する。さらに、測定された原水流量Ｔに即応した制御を行うためには、隙間１１９から薬液吐出口１２１までの間の空間部は注入する薬液で満たされているのが望ましいが、吐出圧の変動などによりこの空間部に原水が流入してこの部分の薬液濃度が変動して応答性のよい制御が難しくなり、殺菌水の品質が低下するという問題がある。さらに、気泡が発生すると、ポンプは空回り状態となり薬液の注入が停止し、もはや殺菌水発生装置としての機能を果たせなくなるという問題が生じた。 Moreover, in the conventional apparatus, the valve | bulb provided with the non-return mechanism opened and closed with a spring is used as the chemical | medical solution injection | pouring valves 111-1 and 111-2. A schematic illustration of one example of such a valve is shown in FIG. Since the pressure on the chemical liquid supply pipe 116 side is higher than that on the raw water side while the chemical liquid injection pump is operating, the chemical liquid injection valve 115 in FIG. A gap 119 is formed between the valve 118 and the chemical solution is injected into the raw water pipe 101 through the gap. When the chemical solution injection pump is stopped, the closing member 117 is pressed against the closing member holder 118 by the spring 120 and the gap 119. Is closed and the injection of chemicals is stopped. Reference numeral 125 denotes an elastic O-ring for sealing. In the case of such a chemical liquid injection valve, in principle, a discharge amount that does not depend on the pressure change on the raw water side can be obtained, but when this type of chemical liquid injection valve is actually used, if the pressure on the raw water side decreases, the discharge amount is To increase. Further, in order to perform control in response to the measured raw water flow rate T, it is desirable that the space between the gap 119 and the chemical solution discharge port 121 is filled with the chemical solution to be injected. As a result, the raw water flows into the space, the concentration of the chemical solution in this portion varies, and it becomes difficult to control with good responsiveness. Furthermore, when bubbles are generated, the pump is in an idle state, the injection of the chemical solution is stopped, and there is a problem that the function as the sterilizing water generator can no longer be performed.
本発明は従来の殺菌水製造装置におけるこれらの問題点を解決し、安定した操作で濃度などの変動が少なく安定した品質の殺菌水を製造することができる殺菌水製造装置及びそれに用いられる薬液注入弁を提供することを目的とする。 The present invention solves these problems in the conventional sterilizing water production apparatus, sterilizing water production apparatus capable of producing a stable quality sterilizing water with less fluctuations in concentration and the like by a stable operation, and chemical injection used therefor The purpose is to provide a valve .
本発明の殺菌水製造装置は、薬液タンクと薬液注入用のポンプの位置関係を規定すること、薬液注入弁として特定構造の２段逆止機能を有する薬液注入弁を採用することによって、前記問題点を解決したものである。すなわち、本発明の装置は次の（１）〜（５）の構成を有するものである。 The sterilizing water production apparatus of the present invention defines the positional relationship between the chemical liquid tank and the chemical liquid injection pump, and adopts the chemical liquid injection valve having a two-stage check function with a specific structure as the chemical liquid injection valve. It is a solution of the point. That is, the apparatus of the present invention has the following configurations (1) to (5).
（１）原水配管内に供給される原水に注入する薬液を貯留する薬液タンクと、前記原水配管に取り付けられた逆止機能を有する薬液注入弁と、薬液注入用のポンプと、前記薬液タンクと前記ポンプとを接続する配管と、前記ポンプと前記薬液注入弁とを接続する配管と、製造する殺菌水の品質設定値と原水配管中の原水流量に基づいて前記ポンプの吐出量を制御する制御装置とを備えた薬液注入システムを少なくとも１系列有し、原水配管に供給される原水中に薬液を注入して殺菌水を製造する装置であって、前記薬液タンクが前記ポンプよりも上方に設置されていると共に、前記薬液注入弁が薬液側にバネにより開閉する逆止機構を備え、原水側に円筒状吐出部の側面に設けられた薬液吐出口を弾性Ｏリングで緊縛した逆止機構を備えた２段逆止機能を有する薬液注入弁であることを特徴とする殺菌水製造装置。 (1) A chemical tank for storing a chemical to be injected into the raw water supplied into the raw water pipe, a chemical injection valve attached to the raw water pipe and having a check function, a chemical injection pump, and the chemical tank Control for controlling the discharge amount of the pump based on piping connecting the pump, piping connecting the pump and the chemical solution injection valve, quality setting value of the sterilizing water to be manufactured, and raw water flow rate in the raw water piping An apparatus for producing sterilizing water by injecting a chemical into raw water supplied to the raw water pipe, wherein the chemical tank is installed above the pump And a non-return mechanism in which the chemical injection valve is provided with a check mechanism that opens and closes by a spring on the chemical solution side, and a chemical discharge port provided on the side surface of the cylindrical discharge portion is bound to the raw water side by an elastic O-ring. 2 prepared Sterilizing water producing device, characterized in that the liquid injection valve having a check function.
（２）原水配管内に供給される原水に注入する薬液を貯留する薬液タンクと、前記原水配管に取り付けられた逆止機能を有する薬液注入弁と、薬液注入用のポンプと、前記薬液タンクと前記ポンプとを接続する配管と、前記ポンプと前記薬液注入弁とを接続する配管と、製造する殺菌水の品質設定値と原水配管中の原水流量に基づいて前記ポンプの吐出量を制御する制御装置とを備えた薬液注入システムを少なくとも１系列有し、原水配管中に供給される原水中に薬液を注入して殺菌水を製造する装置であって、前記薬液注入弁が薬液側にバネにより開閉する逆止機構を備え、原水側に円筒状吐出部の側面に設けられた薬液吐出口を弾性Ｏリングで緊縛した逆止機構を備えた２段逆止機能を有する薬液注入弁であることを特徴とする殺菌水製造装置。 ( 2 ) a chemical liquid tank for storing a chemical liquid to be injected into the raw water supplied into the raw water pipe, a chemical liquid injection valve having a check function attached to the raw water pipe, a chemical liquid injection pump, and the chemical liquid tank; Control for controlling the discharge amount of the pump based on piping connecting the pump, piping connecting the pump and the chemical solution injection valve, quality setting value of the sterilizing water to be manufactured, and raw water flow rate in the raw water piping An apparatus for producing sterilizing water by injecting a chemical solution into raw water supplied into the raw water pipe, wherein the chemical injection valve is provided by a spring on the chemical solution side. It is a chemical injection valve having a two-stage check function, which has a check mechanism that opens and closes and has a check mechanism in which a chemical solution discharge port provided on the side surface of the cylindrical discharge portion is bound to the raw water side with an elastic O-ring. Sterilized water characterized by Forming apparatus.
（３）原水配管内に供給される原水に注入する薬液を貯蔵する薬液タンクと、前記原水配管に取り付けられた逆止機能を有する薬液注入弁と、薬液注入用のポンプと、前記薬液タンクと前記ポンプとを接続する配管と、前記ポンプと前記薬液注入弁とを接続する配管と、製造する殺菌水の品質設定値と原水配管中の原水流量に基づいて前記ポンプの吐出量を制御する制御装置とを備えた薬液注入システムを２系列有し、一方の薬液タンクから供給される薬液が次亜塩素酸ナトリウム水溶液であり、他方の薬液タンクから供給される薬液が塩酸であり、原水配管に供給される原水中に薬液を注入して殺菌水を製造する装置であって、前記薬液タンクが前記ポンプよりも上方に設置されていると共に、前記薬液注入弁が薬液側にバネにより開閉する逆止機構を備え、原水側に円筒状吐出部の側面に設けられた薬液吐出口を弾性Ｏリングで緊縛した逆止機構を備えた２段逆止機能を有する薬液注入弁であることを特徴とする殺菌水製造装置。
（４）
原水配管内に供給される原水に薬液を吐出する薬液注入弁であって、薬液流入側にバネにより開閉する逆止機構を備え、薬液吐出側に円筒状吐出部の側面に設けられた薬液吐出口を弾性Ｏリングで緊縛した逆止機構を備えたことを特徴とする２段逆止機能を有する薬液注入弁。
( 3 ) A chemical solution tank for storing a chemical solution to be injected into the raw water supplied into the raw water piping, a chemical solution injection valve having a check function attached to the raw water piping, a chemical injection pump, and the chemical solution tank, Control for controlling the discharge amount of the pump based on piping connecting the pump, piping connecting the pump and the chemical solution injection valve, quality setting value of the sterilizing water to be manufactured, and raw water flow rate in the raw water piping There are two systems of chemical injection systems equipped with a device, the chemical supplied from one chemical tank is sodium hypochlorite aqueous solution, the chemical supplied from the other chemical tank is hydrochloric acid, and the raw water pipe An apparatus for producing sterilizing water by injecting chemical liquid into the raw water to be supplied, wherein the chemical liquid tank is installed above the pump, and the chemical injection valve is opened and closed by a spring on the chemical liquid side A chemical injection valve having a two-stage check function, including a check mechanism in which a chemical discharge port provided on the side surface of the cylindrical discharge portion is bound to the raw water side with an elastic O-ring. A sterilizing water production apparatus.
(4)
A chemical injection valve that discharges chemical into raw water supplied into the raw water pipe, and has a check mechanism that opens and closes by a spring on the chemical inflow side, and is provided on the side of the cylindrical discharge part on the chemical discharge side A chemical solution injection valve having a two-stage check function, comprising a check mechanism in which an outlet is tightly bound by an elastic O-ring.
本発明の殺菌水製造装置では、薬液タンクを薬液注入用のポンプの上部に設置したことにより薬液注入がより円滑になるとともに、泡の発生が防止でき、ポンプの動作が大きく改善された。また、前記弾性Ｏリングを使用した構造の２段逆止機能を有する薬液注入弁を使用することにより、ポンプの動作の安定化及び泡の発生の防止の効果が得られるとともに、薬液注入弁内への原水の流入を抑えることができ、原水流量測定値に対して応答性のよい制御が可能になり、所定の安定した品質の殺菌水が得られるようになった。 In the sterilizing water manufacturing apparatus of the present invention, the chemical liquid tank is installed on the upper part of the chemical liquid injection pump, so that the chemical liquid injection becomes smoother, the generation of bubbles can be prevented, and the operation of the pump is greatly improved. In addition, by using the chemical injection valve having a two-stage check function having a structure using the elastic O-ring, the effect of stabilizing the operation of the pump and preventing the generation of bubbles can be obtained. Inflow of raw water into the water can be suppressed, control with good responsiveness to the raw water flow rate measurement value is possible, and sterilized water of a predetermined stable quality can be obtained.
図１は本発明の殺菌水製造装置の１例を示す概略系統図である。この装置は原水配管１に設けられた混合部２において、原水配管１内に供給される水道水などの原水３に次亜塩素酸ナトリウムの水溶液と塩酸を注入して混合し、次亜塩素酸殺菌水４を製造するものである。図中の５は流量計である。この装置には、混合部２で原水配管１に薬液を注入するための薬液注入システムが２系列設けられている。 FIG. 1 is a schematic system diagram showing an example of the sterilizing water production apparatus of the present invention. In the mixing unit 2 provided in the raw water pipe 1, this apparatus injects and mixes sodium hypochlorite aqueous solution and hydrochloric acid into raw water 3 such as tap water supplied into the raw water pipe 1, and mixes hypochlorous acid. The sterilizing water 4 is manufactured. 5 in the figure is a flow meter. This apparatus is provided with two series of chemical liquid injection systems for injecting chemical liquid into the raw water pipe 1 in the mixing section 2.
次亜塩素酸ナトリウム水溶液は次亜塩素酸ナトリウム水溶液を貯留する薬液タンク７−１、配管８−１、ポンプ９−１、配管１０−１、薬液注入弁１１−１、制御装置１２を備えた薬液注入システム６−１から原水配管１に注入され、また、塩酸は塩酸を貯留する薬液タンク７−２、配管８−２、ポンプ９−２、配管１０−２、薬液注入弁１１−２、制御装置１２を備えた薬液注入システム６−２から原水配管１に注入され、原水配管１中に供給される原水中で混合されて反応し次亜塩素酸を有効成分とする殺菌水が製造される。次亜塩素酸ナトリウム水溶液及び塩酸の注入量は、制御装置１２によって、殺菌水４の品質設定値（次亜塩素酸濃度、ｐＨなど）と測定された原水流量Ｔに基づいて計算された値によりポンプ９−１及び９−２の吐出量を制御することにより調整される。 The sodium hypochlorite aqueous solution includes a chemical tank 7-1 for storing the sodium hypochlorite aqueous solution, a pipe 8-1, a pump 9-1, a pipe 10-1, a chemical injection valve 11-1, and a control device 12. The chemical solution injection system 6-1 is injected into the raw water pipe 1, and hydrochloric acid is stored in the chemical tank 7-2, the pipe 8-2, the pump 9-2, the pipe 10-2, the chemical injection valve 11-2, and the hydrochloric acid. Bactericidal water containing hypochlorous acid as an active ingredient is produced by injecting into the raw water pipe 1 from the chemical liquid injection system 6-2 including the control device 12 and mixing and reacting in the raw water supplied into the raw water pipe 1. The The injection amount of the sodium hypochlorite aqueous solution and hydrochloric acid is based on the value calculated based on the quality setting values (hypochlorous acid concentration, pH, etc.) of the sterilized water 4 and the raw water flow rate T measured by the control device 12. It is adjusted by controlling the discharge amount of the pumps 9-1 and 9-2.
本発明の装置の特徴点の一つは薬液を貯留する薬液タンク７−１、７−２が、それぞれ薬液注入用のポンプ９−１、９−２よりも上方に設置されている点である。従来の装置ではポンプは薬液タンクと同レベルかあるいは架台上など薬液タンクの上方に設置されているので、ポンプのオン−オフにより薬液注入量を制御する際にポンプ内で気泡が生じやすくなっていた。気泡が生じると１パルス当たりの吐出量が変動し、薬液の注入量が変化するので、殺菌水の濃度が変動することとなる。 One of the features of the apparatus of the present invention is that the chemical liquid tanks 7-1 and 7-2 for storing the chemical liquid are installed above the pumps 9-1 and 9-2 for injecting the chemical liquid, respectively. . In the conventional apparatus, the pump is installed at the same level as the chemical tank or above the chemical tank, such as on the stand, so that bubbles are easily generated in the pump when controlling the amount of injected chemical by turning the pump on and off. It was. When bubbles are generated, the discharge amount per pulse changes and the injection amount of the chemical solution changes, so that the concentration of sterilizing water changes.
本発明の装置では薬液タンクを薬液注入用のポンプよりも上方に設置し、ポンプの吸い込み側に常に薬液のヘッド圧がかかる構造としたので、薬液注入がより円滑になるとともに、薬液注入回路内の泡の発生を防止することができ、ポンプの動作が大きく改善され、さらに、ポンプの初期始動の作業が簡略化された。なお、薬液タンクが大きい場合などは、薬液タンクとポンプとの間に補助タンクを設け、補助タンクをポンプよりも上方になるように設置すれば、薬液タンク自体はポンプと同レベルあるいは下方に設置してもよい。 In the device of the present invention, the chemical tank is installed above the pump for injecting the chemical solution, and the structure is such that the head pressure of the chemical solution is always applied to the suction side of the pump. Generation of bubbles can be prevented, the operation of the pump is greatly improved, and the initial start-up operation of the pump is simplified. If the chemical tank is large, an auxiliary tank is provided between the chemical tank and the pump, and if the auxiliary tank is installed above the pump, the chemical tank itself is installed at the same level as or below the pump. May be.
本発明の装置のもう一つの特徴点は、薬液注入弁１１−１、１１−２として、薬液流入側にバネにより開閉する逆止機構を備え、薬液吐出側に円筒状吐出部の側面に設けられた薬液吐出口を弾性Ｏリングで緊縛した逆止機構を備えた２段逆止機能を有する薬液注入弁としたことである。このような弁の１例の概略説明図を図２に示す。 Another feature of the apparatus of the present invention is that the chemical solution injection valves 11-1 and 11-2 include a check mechanism that opens and closes by a spring on the chemical solution inflow side, and is provided on the side surface of the cylindrical discharge portion on the chemical solution discharge side. The drug solution injection valve having a two-stage check function provided with a check mechanism in which the discharged solution discharge port is bound by an elastic O-ring. A schematic illustration of one example of such a valve is shown in FIG.
図２の薬液注入弁１５は、図４に示した従来のバネにより開閉する逆止機構を備えた薬液注入弁１１５の薬液吐出側に、先端部の側面に設けられた薬液吐出口２１を弾性Ｏリング２４で緊縛して逆止機能を持たせたノズル（円筒状吐出部）２２を取付け、２段逆止機能を有する薬液注入弁としたものである。薬液側のバネにより開閉する逆止機構は図４のものと同じであり、薬液注入用のポンプが作動中は原水側に比較して薬液供給管１６側の圧力が高くなるので、閉子１７が押されてバネ２０が縮み閉子ホルダ１８との間に隙間１９ができ、この隙間を通って薬液がノズル２２の薬液通路側に流れ、薬液注入用のポンプが停止したときにはバネ２０によりシール用のＯリング２５を備えた閉子１７が閉子ホルダ１８に押しつけられ隙間１９が閉鎖され、薬液の注入が止まるようになっている。
The chemical liquid injection valve 15 shown in FIG. 2 is elastically provided with a chemical liquid discharge port 21 provided on the side surface of the tip portion on the chemical liquid discharge side of the chemical liquid injection valve 115 having a check mechanism that is opened and closed by a conventional spring shown in FIG. A nozzle (cylindrical discharge portion) 22 that is tightly bound by an O-ring 24 and has a check function is attached to form a chemical injection valve that has a two-stage check function. The check mechanism that opens and closes by the chemical solution spring is the same as that shown in FIG. 4, and the pressure on the chemical solution supply pipe 16 side is higher than that on the raw water side while the chemical solution injection pump is operating. Is pressed to create a gap 19 between the
ノズル２２は中心に先端が閉鎖された管状の薬液通路２３が設けられており、薬液通路２３の先端部には側方に向けて放射状に薬液吐出口２１が開口しており、この薬液吐出口２１が弾性Ｏリング２４で緊縛されている。薬液吐出口２１の個数は特に限定されるものではなく、例えばノズル２２の直径方向に２ヶ所の吐出口を設けるなど、設計条件により１個以上設ければよい。弾性Ｏリング２４は、ノズル２２の薬液吐出口２１が開口する位置に、各薬液吐出口２１を包含するように円周状の溝を設け、その溝に嵌め込むように取り付けるのが好都合である。この弾性Ｏリング２４は原水がノズル２２内に流入するのを防ぐ機能を有している。 The nozzle 22 is provided with a tubular chemical solution passage 23 whose tip is closed at the center, and a chemical solution discharge port 21 is opened radially toward the side of the tip of the chemical solution passage 23. 21 is bound by an elastic O-ring 24. The number of the chemical solution discharge ports 21 is not particularly limited. For example, two or more discharge ports may be provided in the diameter direction of the nozzle 22 depending on design conditions. The elastic O-ring 24 is advantageously attached so that a circumferential groove is provided so as to include each chemical liquid discharge port 21 at a position where the chemical liquid discharge port 21 of the nozzle 22 is opened, and is fitted into the groove. . The elastic O-ring 24 has a function of preventing raw water from flowing into the nozzle 22.
すなわち薬液注入弁１５では、図４に示したような１段の逆止機構を備えた薬液注入弁の先端部に特定構造のノズル２２を取り付けることによって、図４の例にみられる閉子１１７と閉子ホルダ１１８との間の隙間１１９（薬液注入停止時には閉鎖）から薬液吐出口１２１までの間の空間部に原水が流入するのを防止している。また、薬液吐出口２１が原水配管１の流水部分の近傍に位置しているため、より応答性のよい制御が可能である。さらに、閉子１７と閉子ホルダ１８との間の隙間１９の圧力が、原水の圧力変化の影響を直接受けないため、原水の流量変化すなわち圧力変化にかかわらず、１パルス当たりの吐出量を一定にすることができる。 That is, in the chemical liquid injection valve 15, the nozzle 117 having a specific structure is attached to the tip of the chemical liquid injection valve having a one-stage check mechanism as shown in FIG. The raw water is prevented from flowing into the space between the gap 119 (closed when chemical injection is stopped) and the chemical discharge port 121 between the valve holder 118 and the closing holder 118. In addition, since the chemical solution discharge port 21 is located in the vicinity of the flowing water portion of the raw water pipe 1, more responsive control is possible. Further, since the pressure in the gap 19 between the closing member 17 and the closing holder 18 is not directly affected by the change in the pressure of the raw water, the discharge amount per pulse can be set regardless of the flow rate change of the raw water, that is, the pressure change. Can be constant.
以下実施例により本発明をさらに具体的に説明するが、本発明はこれらの実施例に限定されるものではない。
〔実施例１〕
薬液注入弁１１−１、１１−２として図２に示した構造の２段逆止機能を有する薬液注入弁（薬液吐出口２１は直径方向に２ヶ所、すなわち、中心の薬液通路２３に対して対称の位置となる２ヶ所に開口している）を使用した図１の構成の装置を使用し、原水配管１に設けられた混合部２において、原水配管１内に供給される原水３に次亜塩素酸ナトリウムの水溶液と塩酸を注入して混合し、次亜塩素酸殺菌水４の製造試験を行った。また、比較のため薬液注入弁１１−１、１１−２として図４に示した構造の１段逆止機能を有する薬液注入弁を使用したほかは同一条件とした比較試験を行った。
EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples.
[Example 1]
As the chemical solution injection valves 11-1 and 11-2, the chemical solution injection valve having the two-stage check function of the structure shown in FIG. 1 is used in the mixing section 2 provided in the raw water pipe 1 to the raw water 3 supplied into the raw water pipe 1. An aqueous solution of sodium chlorite and hydrochloric acid were injected and mixed, and a production test of hypochlorous acid sterilized water 4 was conducted. For comparison, a comparative test was performed under the same conditions except that chemical injection valves having a one-stage check function having the structure shown in FIG. 4 were used as the chemical injection valves 11-1 and 11-2.
試験は直径２０ｍｍの原水配管１中に２及び１０リットル／ｍｉｎ（途中で変化させた）の水道水を供給し、薬液注入弁１１−１から１２％の次亜塩素酸ナトリウム水溶液を、薬液注入弁１１−２から１０％の塩酸を供給して、目標濃度を５０ｐｐｍ（次亜塩素酸の濃度）に設定して次亜塩素酸殺菌水を製造することによって行った。薬液の供給量は原水流量を測定し、その測定値（Ｔ）と品質設定値（この場合は次亜塩素酸濃度５０ｐｐｍ）に基づく制御装置１２からの信号によりポンプ９−１、９−２の吐出量を制御することによって行った。
In the test, tap water of 2 and 10 liters / min (changed halfway) was supplied into the raw water pipe 1 having a diameter of 20 mm, and a 12% sodium hypochlorite aqueous solution was injected from the chemical injection valve 11-1 into the chemical injection. This was carried out by supplying 10% hydrochloric acid from the valve 11-2 and setting the target concentration to 50 ppm (concentration of hypochlorous acid) to produce hypochlorous acid sterilized water. The supply amount of the chemical solution is determined by measuring the raw water flow rate, and the signals of the pumps 9-1 and 9-2 based on the measurement value (T) and the quality setting value (in this case,
上記の試験によって得られた殺菌水の濃度（殺菌水発生装置の出口の次亜塩素酸濃度）変化を図５及び図６に示す。図５が２段逆止機能を有する薬液注入弁を使用した本発明の実施例であり、図６が１段逆止機能を有する薬液注入弁を使用した比較例である。
本発明の装置を使用した図５の例では、薬液の注入開始から５〜１０秒で塩素濃度が上昇を始め、１５〜２０秒で目標濃度が得られ、以後、濃度の変動幅が少なく安定した品質の次亜塩素酸殺菌水が得られることがわかる。また、原水の流量を２リットル／ｍｉｎから１０リットル／ｍｉｎに変化させたとき、連動する原水圧力の変化（殺菌水出口の流量を絞ると原水圧力が高くなる、２リットル／ｍｉｎのときの圧力Ｐ＞１０リットル／ｍｉｎのときの圧力Ｐ0 ）による殺菌水濃度変化も認められなかった。
Changes in the concentration of sterilized water (hypochlorous acid concentration at the outlet of the sterilized water generator) obtained by the above test are shown in FIGS. FIG. 5 is an example of the present invention using a chemical injection valve having a two-stage check function, and FIG. 6 is a comparative example using a chemical injection valve having a one-stage check function.
In the example of FIG. 5 using the apparatus of the present invention, the chlorine concentration starts to increase in 5 to 10 seconds from the start of the injection of the chemical solution, and the target concentration is obtained in 15 to 20 seconds. Thereafter, the concentration fluctuation range is small and stable. It can be seen that hypochlorous acid sterilized water of the quality obtained is obtained. Also, when the flow rate of raw water is changed from 2 liters / min to 10 liters / min, the change in the associated raw water pressure (the raw water pressure increases when the flow rate at the sterilizing water outlet is reduced, the pressure at 2 liters / min. No change in sterilizing water concentration was observed due to pressure P 0 ) when P> 10 liters / min.
これに対し１段逆止機能を有する薬液注入弁を使用した図６の例では、薬液の注入開始から塩素濃度が目標の値に到達するまでに１００秒程度を要し、また、薬液注入停止後も濃度が０になるまでに時間がかかり、安定した品質の殺菌水が得られないことがわかる。さらに、原水の流量を２リットル／ｍｉｎから１０リットル／ｍｉｎに変化させたとき（２リットル／ｍｉｎのときの圧力Ｐ＞１０リットル／ｍｉｎのときの圧力Ｐ0 ）、原水圧力の変化による殺菌水濃度変化が顕著に認められた。 On the other hand, in the example of FIG. 6 using a chemical injection valve having a one-stage check function, it takes about 100 seconds from the start of chemical injection until the chlorine concentration reaches the target value, and the chemical injection is stopped. It turns out that it takes time for the concentration to reach 0 later and stable sterilized water cannot be obtained. Further, when the flow rate of the raw water is changed from 2 liters / min to 10 liters / min (pressure P 0 when 2 liters / min> pressure P 0 when 10 liters / min), the sterilizing water due to changes in the raw water pressure A significant change in concentration was observed.
本発明の殺菌水製造装置及び２段逆止機能を有する薬液注入弁は、次亜塩素酸殺菌水など各種殺菌水の製造において優れた性能を発揮するものであるのみならず、薬液の定量注入を必要とする各種の化学装置において広く応用可能なものである。 The sterilizing water production apparatus and the chemical liquid injection valve having a two-stage check function of the present invention not only exhibit excellent performance in the production of various sterilizing water such as hypochlorous acid sterilized water, but also quantitative injection of chemical liquid It can be widely applied to various chemical devices that require the use of
１ 原水配管 ２ 混合部 ３ 原水 ４ 殺菌水 ５ 流量計
６−１、６−２ 薬液注入システム ７−１、７−２ 薬液タンク
８−１、８−２ 、１０−１、１０−２ 配管
１１−１、１１−２ 薬液注入弁 １２ 制御装置
１５ 薬液注入弁 １６ 薬液供給管 １７ 閉子 １８ 閉子ホルダ
１９ 隙間 ２０ バネ ２１ 薬液吐出口
DESCRIPTION OF SYMBOLS 1 Raw water piping 2 Mixing part 3 Raw water 4 Sterilization water 5 Flowmeter 6-1 and 6-2 Chemical solution injection system 7-1, 7-2 Chemical solution tank 8-1, 8-2, 10-1, 10-2 Piping 11 -1, 11-2 Chemical liquid injection valve 12 Control device 15 Chemical liquid injection valve 16 Chemical liquid supply pipe 17 Closure 18 Closure holder 19
Claims (4)
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| JP2004323490A JP4195435B2 (en) | 2004-11-08 | 2004-11-08 | Sterilizing water production apparatus and chemical injection valve used therefor |
| CN 200410095525 CN1772644A (en) | 2004-11-08 | 2004-11-29 | Sterilizing water producing device and chemical liquid filling valve used thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2004323490A JP4195435B2 (en) | 2004-11-08 | 2004-11-08 | Sterilizing water production apparatus and chemical injection valve used therefor |
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| JP2006131565A JP2006131565A (en) | 2006-05-25 |
| JP4195435B2 true JP4195435B2 (en) | 2008-12-10 |
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| JP5512434B2 (en) * | 2010-07-16 | 2014-06-04 | 日機装エイコー株式会社 | Clogging prevention nozzle, injection valve, siphon prevention system |
| JP5618692B2 (en) * | 2010-08-11 | 2014-11-05 | 株式会社川本製作所 | Sanitizer |
| JP5843600B2 (en) * | 2011-12-19 | 2016-01-13 | 水道機工株式会社 | Method for generating and injecting dilute aqueous sodium hypochlorite solution |
| CN104621181B (en) * | 2015-02-16 | 2018-12-28 | 毕力格巴特尔 | Thimerosal and preparation method thereof and device |
| JP7064267B2 (en) * | 2018-03-28 | 2022-05-10 | アクアス株式会社 | How to add chemicals |
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