KR20030044790A - An apparatus and method for producing sterilized water - Google Patents

Abstract

PURPOSE: To provide a device for producing sterilized water which is constituted in a compact size as a whole although a diluting and mixing unit having an enough volume is installed, which does not require a check valve and which produces no chlorine gas. CONSTITUTION: In the device to produce hypochlorous acid-sterilized water by adding an aqueous solution of sodium hypochlorite and an acidic aqueous solution such as hydrochloric acid to the raw water of city water, well water or the like, the inside of a diluting and mixing tank 50 also as a buffer tank is provided with a nozzle for addition of the aqueous solution of sodium hypochlorite, a nozzle 26 for addition of the acidic aqueous solution and mixing and stirring tanks 31, 32 so as to add the raw water and the aqueous solutions from the upside in the vertical direction.

Description

An apparatus and method for producing sterilized water

The present invention relates to an apparatus for producing sterilizing water and a method for producing sterilizing water, and in particular with respect to an apparatus for producing sterilizing water containing hypochlorous acid and a method for producing the same, in an aqueous solution of sodium hypochlorite and hydrochloric acid, sulfuric acid, acetic acid, etc. in raw water such as tap water and well water. The present invention relates to an apparatus and a method for producing hypochlorous acid sterilized water by adding and mixing an acidic aqueous solution.

By adding and mixing sodium hypochlorite (NaC10), hydrochloric acid (HC1), and the like into raw water, it is known that sterilized water having strong bactericidal hypochlorite (HC10) generated in water can be produced. However, when sodium hypochlorite and hydrochloric acid react directly, there is a possibility that harmful chlorine gas (C12) is generated. Therefore, as described in Japanese Patent Application Laid-Open No. 11-188083 or Utility Model Registration No. 3086482, a method of adding and mixing while adjusting the addition amount of sodium hypochlorite and hydrochloric acid to maintain the pH value appropriately; Device is under consideration.

Here, the outline of the conventional apparatus is demonstrated by FIG. In this case, an aqueous hydrochloric acid solution is used as the acidic aqueous solution. In the apparatus shown in FIG. 14, first, the non-return valve 121 is connected to the raw water supply pipe 120, and branched into two pipes 123 and 124 on the downstream side thereof. The non-return valves 125 and 126 are respectively connected to 123 and 124, respectively. And it is connected to the pipelines 127 and 128 which have the addition nozzle 132 of the sodium hypochlorite aqueous solution and the addition nozzle 137 of the aqueous hydrochloric acid solution, and the sodium hypochlorite aqueous solution and hydrochloric acid in these addition nozzles 132 and 137, respectively. An aqueous solution is added in an appropriate amount to the conduit 127 and the conduit 128. Then, the downstream side has dilution stirring tanks (129 and 130), and the added aqueous sodium hypochlorite solution and aqueous hydrochloric acid solution and the supplied raw water are sufficiently mixed. Then, after the conduits 145 and 146 join and pass through the conduit 147 to the mixing stirring tank 148 to sufficiently mix each of the diluted aqueous solutions. At this time, in order to sufficiently perform stirring and mixing of the mixed liquid, studies have been conducted to connect the buffer tank again downstream of the mixed stirring tank 148 as necessary.

In the sterilizing water producing apparatus as shown in Fig. 14, raw water is generally supplied from the lower portion in the vertical direction, and the raw water is closed by closing an end valve (not shown) connected downstream of the mixing stirring tank 148. When the supply is stopped, the pumps 134 and 139 are stopped by a signal from a sensor (not shown) or the like which detects the flow rate of the raw water, and the addition of the aqueous sodium hypochlorite solution and the aqueous hydrochloric acid solution is also stopped. However, since the addition stop after detecting that the supply of raw water has stopped, the addition stop is slightly later in time than the stop of the source water. Therefore, addition of each said aqueous solution is performed with respect to raw water without running water. Therefore, an aqueous solution having a high concentration of sodium hypochlorite or hydrochloric acid is clogged in the vicinity of the addition nozzles 132 and 137 to which the sodium hypochlorite aqueous solution or the aqueous hydrochloric acid solution is added. In this way, the aqueous sodium hypochlorite solution and aqueous hydrochloric acid solution have a higher specific gravity than raw water, causing precipitation diffusion with time, moving to the vicinity of the raw water supply port, and sodium hypochlorite and hydrochloric acid react to generate chlorine gas. It was necessary to provide a closing mechanism such as the non-return valves 125 and 126 directly under each of the additional nozzles 132 and 137.

In the case where the sterilizing water production apparatus is installed in a cold region, it is necessary to install a water draining mechanism upstream and downstream of the non-return valves 125 and 126 to prevent the pipe from being damaged by freezing. There is a problem that the apparatus is complicated and expensive, and the operation is complicated and complicated.

In the apparatus shown in Fig. 14, the addition nozzles 132 and 137 are provided with a valve which opens only when a pressure equal to or higher than a set pressure is applied, and in particular, vaporization of aqueous sodium hypochlorite solution in the addition nozzle 132. The gas tends to be coarse, and the gaseous gas is kept in the addition nozzle 132, so that the bubbles gradually increase. When the bubble is released into the conduit 127 at any timing, the supply of the sodium hypochlorite solution is temporarily reduced, and there is a problem that the residual chlorine concentration and the pH of the sterilized water to be produced are lowered.

As shown in FIG. 15, the mixing stirring tank 148 for stirring the sodium hypochlorite solution and the hydrochloric acid solution is provided above the addition nozzles 132 and 137 of the sodium hypochlorite solution and the aqueous solution of hydrochloric acid in the vertical direction. In this case, since hypochlorous acid itself produced by mixing precipitates and diffuses, and a hydrochloric acid solution having a low pH value precipitates near the sodium hypochlorite aqueous solution addition nozzle 132, chlorine gas may be generated in the same manner. The non-return valve 150 is also required between the nozzle 132 and the mixing agitation tank 148, which leads to a more complicated problem.

In addition, as shown in FIG. 14 and FIG. 15, the apparatus constituted by the piping has a lot of useless space, the whole apparatus becomes large, Furthermore, in order to fully stir in the mixing stirring tank 148, the mixing stirring tank 148 ) It may be necessary to make a large volume itself, or to install a buffer tank again in the lower part of the mixing stirring tank 148, and there existed a problem that an apparatus enlarged further.

The present invention has been made in view of the above problems, and it is not necessary to provide a closing mechanism such as a non-return valve, and further, the apparatus can be miniaturized, and further, the apparatus for producing sterilizing water, which makes it possible to perform sufficient agitation in a mixed stirring tank; It is an object to provide a manufacturing method.

The main invention of the present application is to add sterilized water having a predetermined pH value and / or residual chlorine concentration by adding an aqueous sodium hypochlorite solution and an acidic aqueous solution such as hydrochloric acid, sulfuric acid or acetic acid to raw water such as tap water or well water flowing through a water supply line. In the sterilizing water production apparatus,

A dilution mixing unit connected to a water supply line for supplying the raw water, an addition nozzle for adding the sodium hypochlorite solution, an addition nozzle for adding the acidic aqueous solution, and a discharge pipe for discharging the produced sterilizing water,

The dilution-mixing unit is composed of a cylinder sealed up and down with a plate-shaped body, the water supply line of the raw water, the sodium hypochlorite aqueous solution addition nozzle, and the acidic aqueous solution addition nozzle are combined in an upper plate body. The raw water supplied from the water supply line of the raw water is branched into two or more passages by a branch passage formed inside the dilution mixing unit, and the sodium hypochlorite aqueous solution addition nozzle is disposed to be located in at least one passage. At least one of the remaining passages is combined with an acidic aqueous solution addition nozzle,

In the cylinder constituting the dilution mixing unit, a first tube through which alkaline water to which an aqueous sodium hypochlorite solution is added, a second tube through which acidic water to which the acidic solution is added, and a sterilization in which the alkaline water and the acidic water are mixed are mixed. A third pipe for discharging water from this dilution mixing unit is installed,

The sodium hypochlorite addition nozzle is connected to the first tube, the acidic aqueous solution addition nozzle is connected to the second tube, and the first tube and the second tube are in the vicinity of the plate body below the dilution mixing unit. A ditches or grooves are installed in the dilution mixing unit to discharge the alkaline water and the acidic water into the dilution mixing unit, and the third tube is sterilized water produced near the plate-shaped body on the upper side of the dilution mixing unit. It relates to a sterilizing water production apparatus characterized in that a water passage or groove is introduced into the tube.

Here, the auxiliary plate is arranged so as to overlap the inner side of the plate-shaped body of the upper side of the dilution mixing unit, the branch passage is formed by a groove or a hole extending in the horizontal direction formed in the auxiliary plate, the raw water supply of the upper plate-shaped body Raw water may be supplied to the branch passage through the mouth. Moreover, you may arrange | position a baffle plate in multiple stages up and down in the cylinder which comprises the said dilution mixing unit. Further, a fourth pipe is provided outside the first pipe via a gap for flowing alkaline water, and a fifth pipe is provided outside the second pipe through an interval for flowing acidic water, and outside the third pipe. The sixth pipe is provided through the gap in which sterilizing water flows, and the fourth pipe and the fifth pipe are provided with a water drain or a groove in the vicinity of the upper plate, and the sixth pipe has an upper plate body. A water drain or a water groove may be provided in the vicinity.

The aqueous sodium hypochlorite solution addition nozzle and / or the aqueous solution supply line corresponding to the acidic aqueous solution addition nozzle are connected to each other, and a separate pipeline is connected to each other, and the separate pipe line is the sodium hypochlorite aqueous solution addition nozzle. And / or the acidic aqueous solution-adding nozzles may be positioned above the vertical direction of the corresponding aqueous solution supply line when the nozzles are attached to the dilution mixing unit. It also has an aqueous solution supply line connecting the pump for sending sodium hypochlorite solution or acidic aqueous solution to the respective addition nozzles from the corresponding aqueous solution tank, and connecting the aqueous solution supply line with the tank, the pump and the addition nozzles in that order. The upstream side may be provided below the vertical direction. In addition, an aqueous solution supply line connecting a pump for sending an aqueous sodium hypochlorite solution or an acidic aqueous solution to the corresponding addition nozzles from each of the aqueous solution tanks, and an opening / closing valve connected halfway between the addition nozzles and the corresponding aqueous solution tanks A return pipe may be provided, and the aqueous solution sent out by the pump may be returned to the tank by opening the open / close valve of the return pipe. The tank of aqueous sodium hypochlorite solution and / or the tank of acidic aqueous solution each have two or more pipeline connection portions, and the pipeline connection portion includes a valve body that is elastically pressurized by elastic means, and the pipeline is connected to the pipeline connection portion. When it connects, the said valve body is closed by the said elastic means, the other pipe connection part may be connected to the said aqueous solution supply line, and the other pipe connection part may be connected to the return line.

The main invention of the manufacturing method is the addition of an aqueous sodium hypochlorite solution and an acidic aqueous solution such as hydrochloric acid, sulfuric acid, acetic acid, etc. to raw water such as tap water or well water flowing through a water supply line, and sterilizing water having a predetermined pH value and / or residual chlorine concentration. In the sterilizing water manufacturing method to manufacture,

A dilution mixing unit connected to a water supply line for supplying the raw water, an addition nozzle for adding the sodium hypochlorite solution, an addition nozzle for adding the acidic aqueous solution, and a discharge pipe for discharging the produced sterilizing water,

The dilution mixing unit is composed of a cylinder sealed up and down with a plate-shaped body, the water supply line of the raw water, the sodium hypochlorite aqueous solution addition nozzle, and the acidic aqueous solution addition nozzle are combined in an upper plate body, and the raw water The raw water supplied from the water supply line is branched into two or more passages by a branch passage formed inside the dilution mixing unit, and the sodium hypochlorite aqueous solution addition nozzle is disposed so as to be located in at least one passage. At least one acidic aqueous solution addition nozzle is combined,

In the cylinder constituting the dilution mixing unit, a first tube through which alkaline water to which an aqueous sodium hypochlorite solution is added, a second tube through which acidic water to which the acidic solution is added, and a sterilization in which the alkaline water and the acidic water are mixed are mixed. A third pipe for discharging water from this dilution mixing unit is installed,

The sodium hypochlorite addition nozzle is connected to the first tube, the acidic aqueous solution addition nozzle is connected to the second tube, and the first tube and the second tube are in the vicinity of the plate body below the dilution mixing unit. A ditches or grooves are installed in the dilution mixing unit to discharge the alkaline water and the acidic water into the dilution mixing unit, and the third tube is sterilized water produced near the plate-shaped body on the upper side of the dilution mixing unit. It relates to a sterilizing water production apparatus characterized in that a water passage or groove is introduced into the tube.

Here, an aqueous solution supply line connecting a pump for sending an aqueous sodium hypochlorite solution or an acidic aqueous solution to the respective addition nozzles in a corresponding aqueous solution tank, respectively, wherein the connection portion between the aqueous solution supply line and the tank, the pump, and the addition nozzle In order, the upstream side may be provided below the vertical direction.

In a preferred embodiment of the present invention, a dilution mixing unit is provided, and the dilution mixing unit has a structure in which an additive nozzle, a dilution mixing tank, and a mixing stirring tank are provided in a buffer tank of sterilized water prepared. It makes the whole compact. The supply of raw water is made vertically above the tip of each additional nozzle, and the sodium hypochlorite solution and the acidic aqueous solution having a high concentration close to the tip of the additional nozzle do not widen in the raw water supply path even when precipitated and diffused. I do not need the structure.

In addition, since the aqueous solution diffuses into the mixed stirring tank, it is brought into contact with a sufficiently diluted aqueous solution, and thus has a structure in which almost no chlorine gas is generated. It does not cause problems because it dissolves in water. In addition, in the case of safety considerations, fourth and fifth pipe bodies are provided outside the first pipe body and the second pipe body in which the dilution liquid to which each aqueous solution is added flows, and the fourth pipe body and the fifth pipe body are By placing the outlet to the mixing agitation tank on the upper side of the cylinder constituting the dilution mixing unit, a heavy specific gravity and aqueous sodium hypochlorite solution and a concentrated hydrochloric acid solution do not flow into the mixing agitation tank, and the The generation of chlorine gas can be prevented certainly.

In addition, in order to remove the influence of the vaporization gas of sodium hypochlorite, the downstream side of the aqueous solution tank, the pump, and the addition nozzles are arranged so that the downstream side is vertically upper side, and the addition nozzles are directed downward in the vertical direction. And the pipelines in which the vaporized gas escapes in the opposite direction (vertical direction) are connected to each of the aqueous solution tanks through an electric opening and closing valve, and the air entering the pipelines or the long time stop when the tanks are replaced. By opening and closing the valve and operating the pump when removing the vaporized gas generated in the supply line, the gas can be returned to the tank together with the aqueous solution, and both the gas in the supply line and the addition nozzle can be removed. .

In addition, each aqueous solution is not so high in concentration, but rather to avoid direct contact with human skin and by accidentally spilling the two aqueous solutions to prevent the formation of vaporized gas. The aqueous solution tank has two pipeline connection portions having a valve body added with a spring or an elastic body at the bottom of the tank, and the valve bodies of these pipeline connection portions are normally closed, and projections attached to the joint on the pipeline side when the tank is connected to the apparatus. By depressing the valve body while deforming the spring or the elastic body, the pipeline connection part is opened for the first time, and the two pipelines of the supply pipe of the tank and the aqueous solution and the return pipe for returning the gas in the pipeline to the tank are simultaneously connected to the tank. It is structured. As a result, when the tank is removed from the apparatus, the pipe connecting portion is closed again, and there is no worry that the aqueous solution in the tank spills out of the tank.

1 is a block diagram showing the overall configuration of an apparatus for producing sterilizing water.

2 is an exploded perspective view of the dilution mixing unit.

3 is a longitudinal sectional view of the auxiliary plate.

4 is a longitudinal sectional view of the dilution mixing unit.

5 is a cross-sectional view taken along the line A-A in FIG.

6 is a piping diagram showing a connection between a tank and an additional nozzle.

7 is a longitudinal sectional view showing a connection portion between a tank and a supply line.

8 is a longitudinal cross-sectional view of the connection state.

9 is a block diagram showing the configuration of a control unit.

10 is a longitudinal sectional view of the dilution mixing unit of the modification.

11 is an external perspective view of a baffle plate used in the apparatus.

12 is a longitudinal sectional view of the dilution mixing unit of another modification.

FIG. 13 is a cross-sectional view taken along the line B-B in FIG. 12. FIG.

14 is a piping diagram showing a conventional sterilizing water production apparatus.

15 is a piping diagram showing another conventional sterilizing water production apparatus.

* Explanation of symbols for main parts of the drawings

10 Raw water supply line 11 Pressure reducing valve

12 Solenoid Valve 13,14 Flowmeter

15 Controls 16 Constant Flow Valve

17 Non-return valve 20 Sodium hypochlorite nozzle

22 Sodium hypochlorite aqueous tank 23, 29, 134, 139 Pump

24,29, Opening valve 26,137 Nozzle with hydrochloric acid solution

27 Aqueous hydrochloric acid tank

31 Sodium hypochlorite aqueous solution dilution agitation (pipe)

32 Aqueous hydrochloric acid dilution agitator (pipe) 33 Mixed agitator (pipe)

34 pH meter 35 Drain pipe

36 Manual valve 38,41,123,124,127,128,145,146 Pipeline

39,42,133,138 Supply pipeline 40,43 Return pipeline

44 Discharge pipe 50 Dilution mixing unit (solid)

51 Upper plate 52 Lower plate

53 Subsidiary Board 56

57,58,61,62 Addition nozzle insert slot 60,67 Groove

63 to 65, 68, 69 Concave section 70 Insertion hole for discharge pipe

75,83 Valve body 76,84 spring

77 Injection port 79,112 ~ 116

82 Connections 85 Valve Seat

87 Joint 88 Protrusion

89 Passage 93 Power Circuit

94 Switch Panel 95,100 Interface

96 CPU97 amplifier

98 A-D Converter 99 Comparator

103 Baffle 104 Load

105 Passage Hole 106 Skin

109 ~ 111 Tube 120 Raw water supply pipe

121,125,126,150 Non-return valve 129,130 Dilution stirring

132 Sodium Hypochlorite Aqueous Solution

135,140 tank 147 conduit

148 Mixed stirring tank 149 Sterilizing water discharge tube

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated by one Embodiment of illustration. 1 is a block diagram showing the overall configuration of the apparatus for producing sterilizing water of the present embodiment. First, a raw water supply line 10 is provided to supply the supply water from the tap water, and a pressure reducing valve 11 is connected to the raw water supply line 10. The supply water depressurized by the pressure reducing valve 11 passes through the solenoid valve 12, passes through the flowmeters 13 and 14, and again passes through the constant flow rate valve 16, and then checks the non-return valve 17. It is supplied to the dilution mixing unit 50 through.

In the dilution mixing unit 50, the raw water supply passage 10 is branched into two branch passages (60). Then, the sodium hypochlorite aqueous solution addition nozzle 21 and the hydrochloric acid aqueous solution addition nozzle 26 are arranged in each branch path 60, and after passing through these addition nozzles 21 and 26 to add each aqueous solution, Each of the aqueous solution and the raw water are mixed in the dilute stirring tanks 31 and 32 and passed through the mixed stirring tank 33. The sterilized water produced by mixing is discharged by the discharge pipe 44 in addition to the dilution mixing unit 50. In addition, a pH meter 34 is connected to the discharge conduit 44 so that the pH of the produced sterilized water is checked and then discharged out of the apparatus.

A stop valve such as sand dune or the like is connected to the end of the discharge pipe 44 or a separate pipe is connected and a stop valve such as sand dune is provided to the end of the other pipe. . In addition, in order to discharge the liquid inside, the dilution mixing unit 50 is connected with a drain pipe 35 as necessary, and end stop valves such as sand dunes etc. are used at the end of the other pipe. In order to discharge the liquid inside, the dilution mixing unit 50 is connected with a drain pipe passage 35 as necessary, and a manual on / off valve 36 is provided at the tip of the drain pipe passage 35.

In such an apparatus, the aqueous sodium hypochlorite solution is stored in the tank 22 and is connected to the pump 23 through the conduit 38. Then, the pump 23 is driven by the control unit 15, and the amount suitable for the raw water flow rate is sent to the addition nozzle 21 through the conduit 39. In addition, the tank 22 is connected to the additional nozzle 21 by the conduit 40 via an on-off valve 24 that automatically opens and closes electrically, and the pump 23 in the state where the open / close valve 24 is opened. In this case, the aqueous solution is passed through the conduit 38, the pump 23, the conduit 39, the addition nozzle 21, the conduit 40, and the opening / closing valve 24 in order, and returned to the tank 22 again. It is possible to carry out circulation. Thereby, the gas which has been pumped in the pipe lines 38 and 39 and the addition nozzle 21 can be sent in the tank 22, and the gas of an aqueous solution supply line system can be removed.

The same applies to the supply of the aqueous hydrochloric acid solution, and the aqueous hydrochloric acid solution is accumulated in the tank 22. The hydrochloric acid aqueous solution is connected between the hydrochloric acid aqueous solution addition nozzle 26 and the tank 27 by the pipe lines 41 and 42 and the pump 28, thereby forming a pipe line to be returned.

Next, the structure of the dilution mixing unit 50 is demonstrated with reference to FIGS. The dilution mixing unit 50 has a casing formed by a cylindrical body 50 forming a cylindrical shape, and tubular bodies 31, 32, and 33 are disposed therein, and upper and lower plate-shaped bodies 51 and lower plate-shaped bodies are disposed above and below. A sieve 52 is provided. Moreover, the auxiliary plate 53 is provided so that the lower side of the upper plate-shaped body 51 may overlap. The upper plate body 51 is provided with a raw water supply port 56 and two additional nozzle insertion holes 57 and 58. Next, the raw water branching auxiliary plate 53 is provided with grooves 60 and branching nozzles 61 and 62 for branching the raw water supplied from the raw water supply port 56 of the upper plate body 51. In addition, as shown in FIG. 3, recesses 63, 64, and 65 are formed on the lower surface of the auxiliary plate 53, which constitute grooves for maintaining the positions of the tube bodies 31, 32, and 33. Moreover, the lower plate-shaped body 52 has recesses 68 and 69 for maintaining the positions of the dilution grooves 67 for efficiently mixing respective dilution solutions and the positions of the tubes 31 and 32. A discharge tube insertion hole 70 for discharging sterilized water through the discharge pipe passage 44 is provided.

Next, the dilution mixing unit 50 will be described in detail with reference to FIGS. 4 and 5. FIG. 4 shows a longitudinal section of the dilution mixing unit 50 shown in FIG. 2, and also shows addition nozzles 21 and 26 which are not shown in FIG. The tubes 31, 32, 33 are held in a state of being fitted up and down by the lower plate body 52 and the auxiliary plate 53, and these tubes 31, 32, 33 are moved to the outer cylinder 50. It encloses and the outer cylinder 50 is also fitted up and down by the lower board 52 and the auxiliary board 53. In addition, in order to prevent the leakage of the liquid to the outside, the enemy entity is fitted in the device.

In addition, an actual material is provided between the upper plate 51 and the auxiliary plate 53 to prevent leakage of the liquid. In addition, the sodium hypochlorite aqueous solution addition nozzle 21 and the hydrochloric acid aqueous solution addition nozzle 26 have an additional nozzle insertion holes 57 and 58 for the upper plate body 51 and an additional nozzle insertion holes 61 and 62 for the auxiliary plate 53. It penetrates into and is inserted in the tube bodies 31 and 32. Each addition nozzles 21 and 26 are also provided with a substance for preventing leakage of the liquid. In the upper part of the pipe body 33 connected to the water discharge pipe line 44 for jetting the produced sterilizing water, a water passage 79 for introducing sterilizing water into the pipe body 33 is provided. At the lower end of the pipe body 33, a substance for preventing liquid leakage is provided. Here, instead of providing the water passage 79 in the pipe body 33, a groove for water passage may be provided in the lower surface of the auxiliary plate 53.

Next, the addition nozzles 21 and 26 shown in FIG. 4 are demonstrated. The additional nozzle 21 has a passage therein, and has an injection port 77 whose tip side is open to the side. The tapered valve body 75 is arranged at the distal end of the inner passage as if it is pressed against the valve seat by the spring 76. Therefore, unless the force which overcomes the spring 76 generate | occur | produces in this nozzle 21, it becomes a structure which liquid cannot eject through the injection port 77 in an inner passage.

The aqueous sodium hypochlorite solution guided from the tank 22 by the pump 23 shown in FIG. 1 passes through the pipes 38 and 39 and is led to the road in the addition nozzle 21. At this time, if the automatic valve 24 shown in FIG. 1 is closed, the valve body 75 of the addition nozzle 21 will open against the spring 76 by the increase of the pressure in this nozzle 21, and hypochlorous acid The aqueous sodium solution is added to the raw water supplied through the branch passage 60, and is mixed with the raw water to flow inside the tubular body 31 downward.

In addition, while stopping the production of the sterilizing water for a long time, the vaporization gas generated in the interior of the addition nozzle 21 is discharged to the upper side along the pipe line 40, and this addition forming the supply line for the sodium hypochlorite aqueous solution. It does not stick inside the nozzle 21. Even if there is a vaporized gas in the pipeline 40, in the circulation operation of opening the on-off valve 24 to operate the pump 23, it becomes a circulating flow passing through the pipeline 40 to the tank 22, For this reason, since gaseous gas also flows into the tank 22 and is finally sent into the tank 22, it does not affect the addition amount of the sodium hypochlorite aqueous solution. Moreover, the addition nozzle 26 for aqueous hydrochloric acid solution also has the same structure.

Next, FIG. 6 shows a pipeline system including a supply line from the tanks 22 and 27 to the addition nozzles 21 and 26 and a return line from the addition nozzles 21 and 26 to the tanks 22 and 27. Explain. In addition, it demonstrates here taking the addition nozzle 21 side as an example. In the lower part of the tank 22 which stores the sodium hypochlorite solution, there is a pair of connection parts for connecting the supply line 38 and the return line 40, and the pump 23 is connected to the supply line 38. The pump 23 operates to suck up the aqueous solution from the tank 22 and to guide the conduit 39 through the conduit 38. The pipe line 39 is connected to the addition nozzle 21, and the aqueous solution sucked up by the pump 23 is supplied to the addition nozzle 21.

At this time, the connection part of the lower part of the tank 22, the pump 23, and the addition nozzle 21 are arrange | positioned in the vertical upper direction as it goes downstream, and the pipes 38 and 39 are piped from the bottom upwards, Does not form a convex ridge up. As a result, it is difficult to quench the gas in which the fine vaporized gas generated in the pipe lines 38 and 39 and the pump 23 aggregate. In addition, even when small aggregates of bubbles are generated, the bubbles are sent to the additional nozzles 21 by the supply operation of the aqueous solution by the pump 23 to the additional nozzles 21, and the vertically upward pipe line provided in the additional nozzles 21 is provided. It is sent to the 40 side. Thereby, the quantity of the aqueous solution added to raw water is equal to the quantity sent to the pump 23, and the residual chlorine concentration and pH value of the sterilized water manufactured are stabilized.

However, immediately after the tank 22 is replaced or when the operation is stopped for a long time, the gas and the gas vaporized gas entering the conduit 39 are not only in the conduit 40 but also in the inner passage of the addition nozzle 21. It is possible to reach. Therefore, immediately after the tank 22 is replaced or after stopping for a long time, the on-off valve 24 is automatically opened to operate the pump 23. As a result, the aqueous solution passes through the pipe line 38, the pump 23, the pipe line 39, the addition nozzle 21, the pipe line 40, and the opening / closing valve 24 in the tank 22. The gas in the conduit heading toward the condensate is all detained and transported in the conduit 40 or the tank 22. This operation eliminates the vaporization gas from the supply line of the aqueous solution, and does not adversely affect the amount of the aqueous solution added.

Next, the detailed description of the connecting portion between the tanks 22 and 27 and the supply lines 38 and 41 will be described with reference to FIGS. 7 and 8, taking the tank 22 side as an example. A cylindrical connecting portion 82 is attached to the lower portion of the tank 22, and in the connecting portion 82, a valve body 83 for opening and closing the connecting portion 82 is provided with a valve seat 85 by a spring 84. It is attached as if it is pressed in). The spring 84 is compressed in a state sandwiched between the plate supported by the stopper and the valve body 83. Moreover, the valve body 83 is equipped with the seal member for liquid leakage prevention. On the other hand, the joint 87 connected to the distal end of the conduit 38 has a projection 88. A seal member for preventing liquid leakage is also provided in the projection 88, and a passage 89 is formed therein. Formed.

Next, the connection of the connection part 82 and the joint 87 presses the connection part 82 of the lower part of the tank 22 to the protrusion part 88 of the joint 87 by attaching the tank 22 to this apparatus. Is done by. As the protrusion 88 relatively pushes up the valve body 83 of the connecting portion 82, the valve body 83 of the connecting portion 82 moves upward against the spring 84, as shown in FIG. Since the valve seat 85 is separated from the valve seat 85, the tank 22 and the pipe line 38 are connected to each other.

In contrast, in the case where the tank 22 is removed from the apparatus, as shown in FIG. 7, when the tank 22 is lifted upward, the protrusion 88 of the joint 87 falls from the valve body 83, and the valve The sieve 83 is crimped | bonded to the valve seat 85 by the spring 84, and the connection part of the lower part of the tank 22 is closed by this. Therefore, the aqueous solution in the tank 22 does not overflow outside the tank 22. In the sterilizing water producing apparatus of the present embodiment, two connecting portions are attached to the lower portions of the respective tanks 22 and 27, and each of the connecting portions 82 has a corresponding supply line 38 or 41 or a return line ( 40, 43).

Next, the structure of the control part of such a sterilizing water manufacturing apparatus is demonstrated by FIG. The commercial power source to be used, that is, the 100 V power source, is converted into a voltage of ± 5 V, 5 V, and 24 V by the power supply circuit 93, and is supplied to each motor or CPU circuit. The CPU 96 obtains, via the interface 95, signals corresponding to the flow rates from the two flow meters 13 and 14 for detecting the flow rate of the raw water. At this time, if there is a difference between the two flowmeters 13 and 14 or more, it is determined that at least one of the pair of flowmeters 13 and 14 has a trouble such as discomfort, an alarm is issued, and the solenoid on the temporary side The valve 12 is closed to cut off the supply of raw water and stop the production of sterilizing water. If there is no particular problem in the difference between the signals from the two flowmeters 13 and 14, the flow rate of the raw water is calculated from those signals, and the sodium hypochlorite aqueous solution is supplied based on the information of the flow rate and the preset residual chlorine concentration. The rotation speed of the pump 23 is calculated and operated. In addition, the rotation speed of the supply pump 28 of the aqueous hydrochloric acid solution is calculated and operated on the basis of the pH value previously set and the supply amount of the sodium hypochlorite aqueous solution.

In addition, in the case of removing the gas of the supply line system of each aqueous solution, the CPU 96 is pressed by the corresponding button of the switch panel 94 connected to the CPU 96 via the interface 95 or by a timer or the like. The opening and closing valves 24 and 29 are opened by a command from the same time, and the pumps 23 or 28 are operated for a predetermined time, so that the nozzles 21 and 26 and their opening and closing valves 24 and 29 in each tank 22 and 27 are operated. The circulation flow which returns to tanks 22 and 27 again via () is produced | generated, and the operation | movement which returns the gas in the pipe lines 38, 39, 41, 42 to the tank 22 is performed.

The setting of the pH value of the residual chlorine concentration and the operation / stop switch are performed by the switch panel 94. In addition, the pH meter 34 is connected to the amplifier 97, and the amplifier 97 is connected to the CPU 96 via the AD converter 98 and the comparator 99. If the pH value is different from the set pH value due to clogging of the pipe, the CPU 96 detects an abnormality and displays an alarm or closes the solenoid valve 12 as necessary to stop the production of the sterilizing water. do.

Next, the operation of the sterilizing water producing process by the sterilizing water producing apparatus according to the above configuration will be described. The raw water which has passed through the pressure reducing valve 11, the solenoid valve 12, the flowmeters 13 and 14, and the constant flow valve 16 shown in FIG. 1 enters the inside of the dilution mixing unit 50, and has an upper plate-shaped object. It is branched by the groove | channel 60 of the auxiliary plate 53 arrange | positioned so that the lower side of 51 may be joined. Then, after passing through and around the addition nozzle 21 to which the sodium hypochlorite aqueous solution is added and the addition nozzle 26 to which the acidic aqueous solution is added, the tubes 31 and 32 inside the dilution mixing unit 50. It is passed from the upper side to the lower side in the inside.

On the other hand, the aqueous sodium hypochlorite solution and the aqueous hydrochloric acid solution are sucked up by the pumps 23 and 28 from the tanks 22 and 27 and supplied to the addition nozzles 21 and 26. At this time, the pump 23 supplies the sodium hypochlorite aqueous solution and the aqueous hydrochloric acid solution on the basis of the flow rate measured by the flow meters 13 and 14, the residual chlorine concentration, and the pH value. The raw water supplied by this is mixed with the aqueous sodium hypochlorite solution and the aqueous hydrochloric acid solution, and the alkaline water flows from the upper side to the lower side in the tube 31, and the acidic water flows from the upper side to the lower side in the tube 32.

Alkaline water and acidic water flowing through the tubular bodies 31 and 32 in the dilution mixing unit 50 are provided on the upper surface of the lower plate-shaped body 52 at the junction between the tubular bodies 31 and 32 and the lower plate-shaped body 52, respectively. Guided to the groove 67 and collided, it is discharged into the cylinder 50 of this dilution mixing unit while mixing with each other. At this time, the release of alkaline water and acidic water from the tubular bodies 31 and 32 into the tubular body 50 is not the groove 67 provided in the lower plate body 52, but is channeled below the tubular bodies 31 and 32. A water polo may be provided and discharged therefrom.

Alkaline water and acidic water discharged into the cylinder 50 constituting the dilution mixing unit 50 flow upwards while mixing in the large cylinder 50, and the upper side of the tube 33 and the auxiliary plate 53. (2) flows into the tube (33) from a water inlet (79) installed near the side of the tube, and is mixed again while the inside of the tube (33) flows from the upper side to the lower side, and is discharged to the outside of the apparatus by the discharge line (44). do.

According to the preparation of the sterilizing water by the apparatus for producing sterilizing water, an apparatus for producing a sodium hypochlorite solution having strong sterilizing power by adding an aqueous sodium hypochlorite solution and an acidic aqueous solution such as hydrochloric acid as appropriate, and having a simple structure, the sodium hypochlorite It is possible to prevent the generation of chlorine gas due to the contact of perchloric acid or hypochlorous acid with hydrochloric acid, and can achieve both safety and economic efficiency.

In addition, despite having a dilution mixing unit 50 made of a large cylinder that also serves as a buffer tank, the apparatus becomes compact. In addition, the vaporized gas generated from the aqueous sodium hypochlorite solution is hard to be trapped inside the copper aqueous solution supply line 39 or the addition nozzle 21, and even if only one vaporizes, the vaporized gas can be easily discharged. It does not adversely affect the amount of the aqueous solution added. Therefore, the residual chlorine concentration or pH value of the sterilized water produced is stable. Moreover, when the tank of the sodium hypochlorite aqueous solution and the tank of the acidic aqueous solution are exchanged by an artificial mistake by the connection part 82 provided in the bottom part of the tanks 22 and 27, an aqueous solution may spill or two liquids may be mixed. There is no, and handling becomes quite safe.

Next, modifications will be described with reference to FIGS. 10 and 11. In this modified example, three obstruction plates 103 are arranged in the cylinder 50 constituting the dilution mixing unit with the gap between the tubes 31, 32, and 33 arranged up and down. Here, the three obstruction plates 103 are connected to each other by the rod 104 so as to maintain a predetermined distance from each other. In addition, the baffle plate 103 is provided with a water passage 105 so as to be different from each other, and an escape portion 106 for escaping the tube body 33 which is arranged eccentrically and an escape portion for escaping the tube bodies 31 and 32 ( 107 and 108 are formed.

By arranging these three obstruction plates 103 in the cylinder 50, mixing and stirring of alkaline water and acidic water which flow in the cylinder 50 from the lower side to the upper side are promoted. In addition, a structure that disperses the flow may be provided inside the tubular bodies 31, 32, and 33.

Next, another modified example will be described with reference to FIGS. 10 and 11. This modification is characterized by a structure which prevents mixing by diffusion precipitation of the sodium hypochlorite solution and the hydrochloric acid solution when supply of raw water is stopped. In other words, the tubular bodies 109 and 110 are provided outside the tubular bodies 31 and 32, and the grooves 67 of the lower plate-shaped body 52 are sized to stop inside the tubular bodies 109 and 110, or (67) is removed, and instead the hole 112 is provided in the vicinity of the lower part of the pipe bodies 31 and 32, and the alkaline water and the acidic water which passed through the pipe bodies 31 and 32 were lowered inside the pipe bodies 109 and 110. Passed toward the upper side, guided to the holes 114 and 115 provided in the upper portion of the tubular body (109, 110), or the groove provided in the lower surface of the auxiliary plate 53, discharged into the dilution mixing unit 50 and mixed It is to be.

In this case, even if the aqueous solution concentrated in the vicinity of the addition nozzles 21 and 26 is precipitated and diffused by the addition of the aqueous sodium hypochlorite solution and the hydrochloric acid solution, which stop slightly later after the raw water is stopped, these tubes are formed (109, 110). The generation of chlorine gas is suppressed more completely without coming into contact with each other near the lower part of the bottom. In addition, in order to more fully mix the sterilized water mixed in the mixing and stirring bath as shown in FIG. 12, the tube body 111 is provided in a concentric circle on the outside of the tube body 33, and the lower portion of the tube body 111 is provided. By installing the water inlet 116 in the vicinity of the water, the sterilizing water in the mixing agitation tank 50 is mixed by entering the tubular body 111 from the water outlet 116, and the mixed water is further mixed in the outer tubular body 111. Mixing is further promoted by flowing from the lower side to the upper side and flowing into the inner tube body 33 through the hole 79.

The main invention of the present application is to add sterilized water having a predetermined pH value and / or residual chlorine concentration by adding an aqueous sodium hypochlorite solution and an acidic aqueous solution such as hydrochloric acid, sulfuric acid, and acetic acid to raw water such as tap water or well water flowing through a water supply line. A sterilizing water production apparatus, comprising: a dilution mixture connected to a water supply line for supplying raw water, an addition nozzle for adding sodium hypochlorite solution, an addition nozzle for adding acidic aqueous solution, and a discharge pipe for discharging the produced sterilization water This dilution mixing unit is composed of cylinders sealed with plate-shaped bodies up and down, and is connected to the upper plate body with the raw water supply line, the sodium hypochlorite solution addition nozzle, and the acidic aqueous solution addition nozzle, and the raw water supply pipe Raw water supplied from the furnace is branched into two or more passages by a branch passage formed inside the dilution mixing unit, and is located in at least one passage. A first pipe through which an aqueous sodium hypochlorite solution addition nozzle is disposed, an acidic aqueous solution addition nozzle is coupled to at least one of the remaining passages, and an alkaline water to which an aqueous sodium hypochlorite solution is added is added to the cylinder forming the dilution mixing unit. A second tube through which the acidic water containing the acidic solution is added, and a third tube through which the sterilized water mixed with the alkaline water and the acidic water are discharged from the dilution mixing unit are installed, and the sodium hypochlorite aqueous solution addition nozzle is connected to the first tube. And an acidic aqueous solution addition nozzle is connected to the second tube, and the first tube and the second tube have drainage holes or grooves for discharging alkaline water and acidic water to the inside of the dilution mixing unit in the vicinity of the plate body below the dilution mixing unit. The third pipe is provided with a channel or groove for introducing sterilized water produced in the vicinity of the plate-shaped body on the upper side of the dilution mixing unit into the third pipe. It will have to.

Therefore, according to such a sterilizing water production apparatus and a sterilizing water production method, even if a dilution mixing unit made of a cylinder having a sufficient capacity can be provided, the whole size can be made compact, and the vicinity of the addition nozzle Even if sodium hypochlorite solution or acidic aqueous solution with high concentration is precipitated and diffused, it does not widen in the raw water supply line, and this prevents the mixing of chemicals and prevents the generation of vaporized gas. There is no need for a simple, low-cost sterilized water production apparatus.

Claims (10)

A sterilized water production apparatus for producing sterilized water having a predetermined pH value and / or residual chlorine concentration by adding an aqueous sodium hypochlorite solution and an acidic aqueous solution such as hydrochloric acid, sulfuric acid, and acetic acid to raw water such as tap water or well water flowing through a water supply line. , A dilution mixing unit connected to a water supply line for supplying the raw water, an addition nozzle for adding the sodium hypochlorite solution, an addition nozzle for adding the acidic aqueous solution, and a discharge pipe for discharging the produced sterilizing water, The dilution mixing unit is composed of a cylindrical body encapsulated with a plate-shaped body up and down, wherein the raw water supply line, the sodium hypochlorite aqueous solution addition nozzle, and the acidic aqueous solution addition nozzle are connected to the upper plate body. The raw water supplied from the feed pipe line of the raw water is branched into two or more passages by a branch passage formed inside the dilution mixing unit, and the sodium hypochlorite aqueous solution addition nozzle is located in at least one passage. An acidic aqueous solution addition nozzle is coupled to at least one of the remaining passages, In the cylinder constituting the dilution mixing unit, a first tube through which alkaline water to which an aqueous sodium hypochlorite solution is added, a second tube through which acidic water to which the acidic solution is added, and a sterilization in which the alkaline water and the acidic water are mixed are mixed. A third pipe for discharging water from this dilution mixing unit is installed, The sodium hypochlorite addition nozzle is connected to the first tube, the acidic aqueous solution addition nozzle is connected to the second tube, and the first tube and the second tube are in the vicinity of the plate body below the dilution mixing unit. A ditches or grooves are installed in the dilution mixing unit to discharge the alkaline water and the acidic water into the dilution mixing unit, and the third tube is sterilized water produced near the plate-shaped body on the upper side of the dilution mixing unit. Sterilizing water production apparatus characterized in that the water inlet or groove is introduced into the pipe. The method of claim 1, The auxiliary plate is arranged to overlap the inside of the plate-shaped body on the upper side of the dilution mixing unit, and the branch passage is formed by a groove or a hole extending in the horizontal direction, and the raw water supply port of the upper plate-shaped body is formed. Sterilizing water production apparatus characterized in that the raw water is supplied to the branch passage through. The method of claim 1, A sterilizing water production apparatus, characterized in that the baffle plate is arranged in multiple stages up and down in the cylinder constituting the dilution mixing unit. The method of claim 1, A fourth pipe is installed outside the first pipe via a gap for flowing alkaline water, and a fifth pipe is installed outside the second pipe through an interval for flowing acidic water. The sixth pipe is provided through the gap flowing through the pipe, and the fourth pipe and the fifth pipe are provided with a water outlet or a water passage in the vicinity of the upper plate, and the sixth pipe is located near the lower plate. Sterilizing water production apparatus characterized in that the water supply port or a water supply groove is installed. The method of claim 1, An aqueous solution supply line corresponding to the sodium hypochlorite aqueous solution addition nozzle and / or the acidic aqueous solution addition nozzle is connected to each other, and a separate pipeline is connected to each other, and the separate pipeline is the sodium hypochlorite aqueous solution addition nozzle and And / or an acidic aqueous solution addition nozzle attached to the dilution mixing unit, wherein the apparatus for producing sterilizing water is located in the vertical direction above the corresponding aqueous solution supply line. The method of claim 5, It has an aqueous solution supply line connecting the pump which sends the sodium hypochlorite solution or the acidic aqueous solution to each addition nozzle in the corresponding aqueous solution tank, and the connection part of the said aqueous solution supply line and the tank, the said pump, the said addition nozzle in order. Sterilizing water production apparatus, characterized in that the upstream side is installed in the vertical lower side. The method of claim 5, An aqueous solution supply line connecting a pump for sending an aqueous sodium hypochlorite solution or an acidic aqueous solution to the corresponding addition nozzles from each aqueous solution tank, and an opening / closing valve connected halfway between the addition nozzle and the corresponding aqueous solution tank. A sterilizing water production apparatus having a turning pipe, and returning the aqueous solution sent to the pump to the tank by opening the on / off valve of the returning pipe. The method of claim 5, The tank of aqueous sodium hypochlorite solution and / or the tank of acidic aqueous solution each have two or more pipeline connection portions, and the pipeline connection portion includes a valve body that is elastically pressurized by elastic means, and when the pipeline is connected to the pipeline connection portion, When the valve body is opened and the pipeline is detached from the pipeline connection part, the valve body is closed by the elastic means, while the other pipeline connection part is connected to the aqueous solution supply pipe, and the other pipeline connection part is connected to the returned pipe line. Sterilizing water production apparatus, characterized in that connected. In the sterilized water production method for producing sterilized water of a predetermined pH value and / or residual chlorine concentration by adding an aqueous sodium hypochlorite solution and an acidic aqueous solution such as hydrochloric acid, sulfuric acid, acetic acid to the raw water, such as tap water or well water flowing through the water supply line , A dilution mixing unit connected to a water supply line for supplying the raw water, an addition nozzle for adding the sodium hypochlorite solution, an addition nozzle for adding the acidic aqueous solution, and a discharge pipe for discharging the produced sterilizing water, The dilution mixing unit is composed of a cylinder sealed up and down with a plate-shaped body, the water supply line of the raw water, the sodium hypochlorite aqueous solution addition nozzle, and the acidic aqueous solution addition nozzle are coupled to the upper plate body, and the raw water supply pipe The raw water supplied from is branched into two or more passages by a branch passage formed inside the dilution mixing unit, and the sodium hypochlorite aqueous solution addition nozzle is disposed to be located in at least one passage, and at least one of the remaining passages. An acidic aqueous solution addition nozzle is combined, In the cylinder constituting the dilution mixing unit, a first tube through which alkaline water to which an aqueous sodium hypochlorite solution is added, a second tube through which acidic water to which the acidic solution is added, and a sterilization in which the alkaline water and the acidic water are mixed are mixed. A third pipe for discharging water from this dilution mixing unit is installed, The sodium hypochlorite addition nozzle is connected to the first tube, the acidic aqueous solution addition nozzle is connected to the second tube, and the first tube and the second tube are in the vicinity of the plate body below the dilution mixing unit. A ditches or grooves are installed in the dilution mixing unit to discharge the alkaline water and the acidic water into the dilution mixing unit, and the third tube is sterilized water produced near the plate-shaped body on the upper side of the dilution mixing unit. Sterilizing water production method characterized in that the water inlet or groove is introduced into the pipe. The method of claim 9, It has an aqueous solution supply line connecting the pump which sends the sodium hypochlorite solution or the acidic aqueous solution to each addition nozzle in the corresponding aqueous solution tank, and the connection part of the said aqueous solution supply line and the tank, the said pump, the said addition nozzle in order. Sterilized water production method characterized in that the upstream side is installed in the vertical lower side.