JP5478151B2 - Fluid supply device - Google Patents

Description

  The present invention is a fluid supply device for supplying two kinds of fluids, respectively, and in particular, a weakly acidic chlorine water used for sterilization of foods or the like by mixing a hypochlorite aqueous solution and a hydrochloric acid aqueous solution. The present invention relates to a two-fluid mixing device applied to an acidic chlorine water production device.

  For example, a hypochlorite aqueous solution such as a sodium hypochlorite aqueous solution is generally used as a disinfectant for sterilizing an object to be sterilized such as food. This aqueous hypochlorite aqueous solution has a relatively high hydrogen ion index (hereinafter referred to as “pH”) (for example, pH 8 or more) and is often used in this state. The abundance of chlorate ions increases, and the bactericidal power in this case is relatively weak.

  Therefore, in order to exert a stronger sterilizing power in the hypochlorite aqueous solution, it is desirable to lower the pH and increase the abundance of hypochlorous acid, but if this pH is too low (for example, pH 4 or lower) In this case, a large amount of toxic chlorine gas is generated, which is not preferable.

  Therefore, it is desirable to adjust the pH of the hypochlorite aqueous solution to be in a slightly acidic state of about 6 in order to exert high sterilizing power while suppressing generation of chlorine gas. For example, a hydrochloric acid aqueous solution is used for adjusting the pH of the hypochlorite aqueous solution. In order to adjust pH by mixing aqueous hydrochloric acid solution with hypochlorite aqueous solution, a method of mixing hypochlorite aqueous solution and aqueous hydrochloric acid solution in a supply path for supplying dilution water, and mixing and diluting with a static mixer. It is common. By doing in this way, the weak acidic chlorine water with the high bactericidal effect adjusted to predetermined | prescribed pH is produced | generated.

  However, when hypochlorite aqueous solution and hydrochloric acid aqueous solution are injected into the dilution water supply path and mixed and diluted, the locally concentrated hypochlorite aqueous solution and the concentrated hydrochloric acid aqueous solution come into contact with each other. As a result, toxic chlorine gas may be generated. Therefore, it is necessary to dilute the hypochlorite aqueous solution and the hydrochloric acid aqueous solution step by step to suppress the generation of chlorine gas. At this time, the first storage tank for storing the hydrochloric acid aqueous solution, It is important that the second storage tank for storing the chlorite aqueous solution is securely attached to the supply path for supplying each solution without being mistaken for the second storage tank.

  The present invention has been made in view of the above circumstances, and provides a fluid supply device that is securely attached to a corresponding supply path without mistaking the first and second tanks that store two types of fluids. The task is to do.

The present invention is to solve the above-described problems, and has a tank body 551,581 having a circular cross section, on-off valves 553,583 provided in the outflow holes 552a, 582a at the bottom of the tank body 551,581, and The first and second storage tanks 550 have insertion portions 552 and 582 formed at the bottoms of the tank main bodies 551 and 581 so as to surround the on-off valves 553 and 583, and store two kinds of fluids individually. 580, upper receiving portions 561, 591 into which the tank main bodies 551, 581 are inserted / removed, lower receiving portions 562, 592 from which the inserting portions 552, 582 are inserted / removed, and the open / close valves 553, 583. The first and second receiving bodies 560 and 590 having projections 563 and 593 provided in the lower receiving portions 562 and 592 and attached to the receiving bodies 560 and 590, respectively. A fluid supply device including first and second supply paths 3 and 5 for circulating the fluid in the distillation tanks 550 and 580 through the outflow holes 552a and 582a to the downstream side, and the first storage tank 550 The cross section of the tank main body 551 is smaller in diameter than the cross section of the tank main body 581 of the second storage tank 580, and the cross section of the insertion portion 552 of the first storage tank 550 is smaller than the cross section of the insertion portion 582 of the second storage tank 580. Each of the receiving bodies 560 and 590 has an upper receiving portion 561, 591 and a lower receiving portion 562, 592 corresponding to the outer shapes of the tank main bodies 551, 581 and the insertion portions 552, 582 of the storage tanks 550, 580. The inner diameter of the upper receiving portion 561 of the first receiving body 560 through which the tank main body 551 having a small outer diameter is inserted and removed is that of the tank main body 551 having a small outer diameter. Greater than the diameter, and the tank main body 581 having a large outer diameter I inside diameter identical der of the upper receiving portion 591 of the are inserted and removed a second receiving body 590, the first receiving member 560, said by the inserted adjusting member 561a to 1 receiving body 560, an inner diameter to fit the outside diameter of the outer diameter of a small tank body 551 is characterized that you have been adjusted.

In this case, since the cross section of the tank main body 551 of the first storage tank 550 is made smaller than the cross section of the tank main body 581 of the second storage tank 580, it is possible to prevent the tank main bodies 551 and 581 from being mixed up. Furthermore, since the cross section of the insertion portion 552 of the first storage tank 550 is made larger than the cross section of the insertion portion 582 of the second storage tank 580, even if the tank main bodies 551, 581 are mistaken, the receivers 560, 590 It cannot be inserted. That is, since it has a double prevention structure, the tank main bodies 551 and 581 can be reliably inserted into the receiving bodies 560 and 590 without being mistaken .

According to the present invention, the cross-section of the tank body of the first storage tank, as well as smaller than the cross section of the tank main body in the second storage tank, the insertion portion of the cross-section of the first storage tank to be inserted into the first receiving member The upper receiving part and the lower receiving part of each receiving body correspond to the outer shape of the tank main body and the inserting part of each storing tank, so that it is larger than the cross section of the inserting part of the second storing tank. Therefore, it is possible to prevent the tank body from being mistaken and to be surely inserted into the corresponding receiving body.

The flowchart of the weak acidic chlorine water manufacturing apparatus which concerns on one Embodiment of this invention. The enlarged view of the principal part of a weak acidic chlorine water manufacturing apparatus. The enlarged view which shows the 1st storage tank which stores hydrochloric acid aqueous solution. The enlarged view which shows the 2nd storage tank which stores hypochlorite aqueous solution. The enlarged view which shows the state which attached the 1st storage tank to the 1st supply container via the 1st receiving body. The enlarged view which shows the state which attached the 2nd storage tank to the 2nd supply container via the 2nd receiving body. (A), (b) is the modification of a 1st storage tank, and the front view and top view which show the 1st storage tank whose cross section is a square. (A), (b) is the modification of a 2nd storage tank, and the front view and top view which show the 2nd storage tank with a circular cross section.

  Hereinafter, a fluid supply apparatus according to the present invention will be described as an embodiment with reference to the drawings, taking as an example a weakly acidic chlorine water production apparatus which is an aspect of a two-fluid mixing apparatus.

  The weakly acidic chlorinated water production apparatus 1 shown in FIGS. 1 and 2 dilutes a hypochlorite aqueous solution and a hydrochloric acid aqueous solution with a dilution water, and mixes and dilutes the diluted hypochlorite aqueous solution and the hydrochloric acid aqueous solution. A weakly acidic chlorinated water having a predetermined pH is produced. In this embodiment, a sodium hypochlorite aqueous solution having a predetermined concentration is used as the hypochlorite aqueous solution. As a stock solution of a hydrochloric acid aqueous solution used as a pH adjuster for a hypochlorite aqueous solution, a solution having a predetermined weight percent concentration is used. This aqueous hydrochloric acid solution is particularly useful in that it is not affected by organic substances. In the present embodiment, “weakly acidic” refers to a range of pH 5 to 7 (pH 7 is strictly speaking neutral, but here treated as “weakly acidic”).

  The weakly acidic chlorinated water production apparatus 1 includes a main supply path 2 for supplying dilution water, a first supply path 3 for supplying dilution water for diluting hydrochloric acid aqueous solution, and a supply for supplying hydrochloric acid aqueous solution to the first supply path 3 A device (hereinafter referred to as “first supply device”) 4, a second supply path 5 for supplying dilution water for diluting the hypochlorite aqueous solution, and supplying a hypochlorite aqueous solution to the second supply path 5 A supply device (hereinafter referred to as a “second supply device”) 6, a first supply path 3 and a second supply path 5, and a hydrochloric acid solution diluted in the first supply path 3 and the second supply path 5. A third supply path 7, a first supply device 4, and a second supply device 6 that generate weakly acidic chlorinated water having a predetermined hydrogen ion index by mixing and diluting the diluted hypochlorite aqueous solution. A control device 8 or the like is provided.

  The main supply path 2 is provided with a water supply pump 21, a flow rate adjusting valve (for example, a needle valve) 22, a flow meter 23, and a pressure gauge 24, and dilution water is supplied downstream of the main supply path 2 by the water supply pump 21. The flow rate and pressure of the dilution water can be measured with a flow meter 23 and a pressure meter 24. A first supply path 3 and a second supply path 5 are branched from the main supply path 2.

  In the first supply path 3, a first inlet 31 for injecting a hydrochloric acid aqueous solution supplied from the first supply device 4 and a hydrochloric acid aqueous solution supplied from the first supply device 4 are mixed with dilution water for dilution. And a first flow rate adjustment valve (for example, a needle valve) 33 that adjusts the flow rate of the aqueous hydrochloric acid solution (including dilution water) flowing through the first supply path 3.

  The first mixing dilution section 32 has an inner diameter larger than the inner diameter of the first supply path 3, and a plate member (baffle plate) 34 having a plurality of through holes 34 a is provided in the middle. As a result, a flow resistance against the aqueous hydrochloric acid solution and the diluting water that has flowed into the first mixed diluting unit 32 is generated at a portion upstream of the plate member 34 of the first mixed diluting unit 32, and the aqueous hydrochloric acid solution and the diluting water are generated. A region 35 (hereinafter referred to as “first reaction region”) is formed.

  The first mixing / dilution unit 32 further uniformly dilutes the hydrochloric acid aqueous solution and the diluting water diffused through the through hole 34a of the plate member 34 in a portion downstream of the plate member 34 (hereinafter referred to as “first”). 36) is formed. The dilution water and the hydrochloric acid aqueous solution supplied to the first supply path 3 are mixed for a predetermined time in the first reaction region 35 by the flow resistance of the plate member 34, and pass through the through hole 34 a of the plate member 34. By diffusing into the region 36 and passing through the first stable region 36, the solution is uniformly diluted to form a hydrochloric acid aqueous solution diluted to a predetermined concentration.

  The first flow rate adjustment valve 33 is provided on the downstream side of the first mixing / dilution unit 32. By operating the first flow rate adjustment valve 33, the pressure in the first mixing / dilution unit 32 is adjusted, The flow rate of the aqueous hydrochloric acid diluted by the first mixing / dilution unit 32 or the dilution water before flowing into the first mixing / dilution unit 32 can be adjusted.

  In the second supply path 5, a second inlet 41 for injecting a hypochlorite aqueous solution supplied from the second supply device 6, and a hypochlorite aqueous solution and dilution supplied from the second supply device 6 A second flow dilution valve (reaction tank) 42 for mixing and diluting water, and a second flow rate adjusting valve (for adjusting the flow rate of the hypochlorite aqueous solution (including diluted water) flowing through the second supply device 6) For example, a needle valve) 43 is provided.

  Similarly to the first mixing / dilution unit 32, the second mixing / dilution unit 42 has an inner diameter larger than the inner diameter of the second supply path 5, and a plate member having a plurality of through-holes 44 a in the middle thereof (disturbance) Plate) 44 is provided. As a result, a flow resistance against the hypochlorite aqueous solution and dilution water that has flowed into the second mixed dilution section 42 is generated in a portion upstream of the plate member 44 of the second mixed dilution section 42, and hydrochloric acid is generated. A region (hereinafter referred to as “second reaction region”) 45 in which the aqueous solution and the dilution water are mixed is formed.

  The second mixing / dilution section 42 is a region where the aqueous hydrochloric acid solution and the diluting water diffused through the through hole 44a of the plate member 44 are mixed more uniformly in the downstream portion of the plate member 44 (hereinafter referred to as “second”). 46) (referred to as “stable region”). The diluting water and hydrochloric acid aqueous solution supplied to the second supply path 5 are mixed in the second reaction region 45 for a predetermined time by the flow resistance of the plate member 44 and pass through the through hole 44a of the plate member 44. By diffusing into the region 46 and passing through the second stable region 46, a hypochlorite aqueous solution that has been uniformly diluted to a predetermined concentration is obtained.

  The second flow rate adjustment valve 43 is provided on the downstream side of the second mixing dilution unit 42, and by operating the second flow rate adjustment valve 43, the internal pressure of the second mixing dilution unit 42 is adjusted, The flow rate of the hypochlorite aqueous solution diluted by the second mixing / dilution unit 42 or the flow rate of the diluted water before flowing into the second mixing / dilution unit 42 can be adjusted.

  A differential pressure gauge 51 is provided between the first supply path 3 and the second supply path 5. The differential pressure gauge 51 is provided between a position upstream of the first inlet 31 of the first supply path 3 and a position upstream of the second inlet 41 of the second supply path 5. The pressure difference of the dilution water flowing through this position is measured.

  The first supply device 4 includes a first storage unit 55 that stores an aqueous hydrochloric acid solution, and a first injection pump 56 that sends the aqueous hydrochloric acid solution stored in the first storage unit 55 to the first supply path 3. The second supply device 6 also includes a second storage unit 58 that stores the hypochlorite aqueous solution, and a second storage unit 58 that sends the hypochlorite aqueous solution stored in the second storage unit 58 to the second supply path 5. Two infusion pumps 59 are provided.

  Here, the structure of the 1st and 2nd storage parts 55 and 58 is demonstrated in detail with reference to FIGS. As shown in FIGS. 3 and 5, the first storage unit 55 includes a first storage tank 550 that stores a required chemical solution, that is, a hydrochloric acid aqueous solution, and a first receiver that detachably receives the first storage tank 550. 560 and a first supply container 570 for receiving the aqueous hydrochloric acid solution in the first storage tank 550 while the first receiver 560 is detachably mounted.

  The first storage tank 550 includes a tank main body 551 for containing a hydrochloric acid aqueous solution, an annular male screw 551a formed to extend outward from the bottom opening of the tank main body 551, and a female screw that is screwed to the male screw 551a. A lid body 552 as an insertion portion, an outflow hole 552a formed in the center of the lid body 552, an on-off valve 553 provided in the outflow hole 552a, and an outer surface of the bottom of the lid body 552, that is, the outflow hole 552a. An annular mouth portion 554 formed on the outer surface of the peripheral portion of the rim, and an opening / closing valve 553 described later formed concentrically with the mouth portion 554 on the inner surface of the bottom portion of the lid body 552, that is, the inner surface of the peripheral portion of the outflow hole 552a. The annular valve seat 553c and a handle 555 provided on the upper part of the tank main body 551 so as to straddle both sides are provided. Then, the outer peripheral surface of the lid (hereinafter referred to as the insertion portion) 552 is positioned so as to surround the outside of the on-off valve 553, and the mouth 554 protrudes outward from the lid 552.

  The on-off valve 553 is inserted into the outflow hole 552a and reciprocally movable, and a valve rod 553a that is provided to be freely reciprocated, and a spring 553b that is fitted into the distal end side of the valve rod 553a and biases the valve rod 553a in the outward direction. And a packing 553d that is fixed to the base end portion of the valve stem 553a and is made of fluororubber that contacts and separates from the valve seat 553c.

  The first receiver 560 has a bottomed cylindrical shape, and the size of the inner diameter is set so as to correspond to the outer diameter of the tank body 551. Specifically, a receiving body 560 similar to a second receiving body 590 having an inner diameter matched to a tank body 581 having a large outer diameter, which will be described later, is used, and a tank body 551 having a small outer diameter is inserted and removed. An annular adjusting member 561 a is inserted into the one receiving body 560, and the inner diameter is adjusted according to the outer diameter of the tank body 551. Further, the side wall of the upper portion of the first receiving body 560 serves as an upper receiving portion 561 that receives the tank body 551. The opening end portion of the upper receiving portion 561 protrudes from the opening end portion of the first supply container 570 and has a height that can sufficiently support the tank body 551. An annular lower receiving portion 562 is provided at the lower portion of the side wall of the first receiving body 560 and the peripheral portion of the bottom wall. The lower receiving portion 562 is set so as to be larger than the height of the insertion portion 552 of the tank body 551 and to have a height at which the opening end surface of the mouth portion 554 contacts the bottom portion. That is, the tank body 551 is configured to be inserted and supported in an upright state. Also, a columnar protrusion 563 for erecting the valve rod 553a of the on-off valve 553 is provided upright at the center of the bottom wall. The protrusion 563 has a height that pushes up the tip of the valve stem 553a to a position in the vicinity of the outflow hole 552a so that the peripheral edge of the packing 553d is detached from the annular valve seat 553c. In addition, a plurality of communication holes 564,... Are formed radially on the peripheral edge of the protrusion 563. The communication holes 564,... Are smaller than the inner diameter of the lower receiving portion 562, and the outflow holes 552a, the inner space of the mouth portion 554, the space between the insertion portion 552 and the bottom portion of the receiving body 560, and the lower side of the first supply container 570. It communicates with the side space.

  The first supply container 570 has an annular mounting portion 571 on which the first receiving body 560 is mounted on the upper side, and a space (receiving portion) formed on the lower side by the lower side portion and the bottom wall of the side wall. 572. And the bottom wall of the 1st supply container 570 becomes a taper surface which inclines gently toward the center part. A pump 56 is connected to a discharge hole 573 formed in the center of the bottom portion via a joint 574, and the pump 56 is connected to the first supply path 3. That is, the hydrochloric acid aqueous solution received in the first supply container 570 is discharged to the first supply path 3.

  The second reservoir 58 is substantially the same as the configuration of the first reservoir 55, and only different points will be described with reference to FIGS. The outer diameter of the tank main body 581 of the second storage tank 580 is larger than the tank main body 551 of the first storage tank 550, and the outer diameter of the lid 582 serving as the insertion portion of the tank main body 581 is inserted into the first storage tank 550. It is smaller than the portion 552. Further, the second tank main body 581 is directly inserted into the upper receiving portion 591 of the second receiving body 590, and an adjustment member is not necessary. The inner diameter of the lower receiving portion 592 of the second receiving body 590 and the opening area of the communication hole 594 are reduced in accordance with the outer diameter of the lid body (hereinafter referred to as the insertion portion) 582 of the second tank body 581.

  Here, although explanation of each member constituted similarly is omitted, the code of the 2nd storage part 58 and each part name are arranged. Reference numeral 580 is a second storage tank, 581 is a tank body, 581a is an external thread, 582 is an insertion portion, 582a is an outflow hole, 583 is an open / close valve, 583a is a valve rod, 583b is a spring, 583c is a valve seat, 583d is a packing, 584 is a mouth portion, 585 is a handle, 590 is a second receiver, 591 is an upper receiving portion, 592 is a lower receiving portion, 593 is a projection, 594 is a communication hole, 600 is a second supply container, 601 is a mounting portion, Reference numeral 602 denotes a receiving portion, 603 denotes a discharge hole, and 604 denotes a joint.

  Next, a mode in which the first and second storage tanks 550 and 580 are inserted into and removed from the first and second receiving bodies 560 and 590 attached to the first and second supply containers 570 and 600 will be described. First, in a state where the storage tanks 550 and 580 are not inserted into the receiving bodies 560 and 590, the handles 555 and 585 of the storage tanks 550 and 580 are gripped, and the upper receiving portions 561 of the receiving bodies 560 and 590 are held. , 591, the tank main bodies 551, 581 are inserted in an upright state, and the insertion portions 552, 582 of the tank main bodies 551, 581 are inserted into the receiving bodies 560, 590. It is inserted into the hollow portion of the lower receiving portion 592. At this time, in a state where the tank main bodies 551 and 581 are inserted into the receiving bodies 560 and 590, the upper portions of the tank main bodies 551 and 581 protrude from the upper surface openings of the receiving bodies 560 and 590, respectively. The protrusions 563 and 593 of the receivers 560 and 590 push up the valve rods 553a and 583a against the springs 553b and 583b, the packings 553d and 583d are detached from the valve seats 553c and 583c, and the tank main bodies 551 and 581 The opening end portions of the mouth portions 554 and 584 are in contact with the bottom portions of the receiving bodies 560 and 590. As a result, the opening portions of the valve seats 553c and 583c, the outflow holes 552a and 582a, the opening portions of the mouth portions 554 and 584, and the outflow holes 552a and 582a communicate with each other. The lower side of each supply container 570, 600 communicates. That is, the aqueous hydrochloric acid solution stored in the first tank main body 551 and the hypochlorite aqueous solution stored in the second tank main body 581 are received in the lower side portion of the second receiving container 600. . Then, the fluids received in the supply containers 570 and 600 are supplied to the first and second supply paths 3 and 5 by driving the pumps 56 and 59.

  Even if the second storage tank 580 having the large-diameter tank body 581 is erroneously inserted into the first receiving body 560, the opening diameter of the upper receiving portion 591 of the first receiving body 560 is the same as that of the second tank body 581. Cannot be inserted because it is smaller than the outer diameter. Similarly, even if the first storage tank 550 having the first tank main body 551 having a small diameter is to be inserted into the second receiver 590, the outer diameter of the second tank main body 581 and the upper receiver of the first receiver 560. It cannot be inserted due to the difference with the opening diameter of 561.

  Further, when the tank main bodies 551 and 581 are pulled out from the respective receiving bodies 560 and 590, the tank main bodies 551 and 581 are pulled out in an upright state along the upper receiving portions 561 and 591 of the receiving bodies 560 and 590, and the protrusions 563 The valve rods 553a and 583a pushed open by the spring 593 are biased in the advancing direction by the elastic biasing of the springs 553b and 583b, the packings 553d and 583d are pressed against the valve seats 553c and 583c, and the valve seat 553c , 583c are closed, and the aqueous hydrochloric acid solution and hypochlorite aqueous solution stored in the storage tanks 550 and 580 are prevented from flowing out.

  By carrying out like this, the diluted hydrochloric acid aqueous solution and hypochlorite aqueous solution can be mixed in the downstream 3rd supply path 7 mentioned later, and can be diluted in steps, and hypochlorous acid with high concentration can be obtained. The salt aqueous solution and the hydrochloric acid aqueous solution having a high concentration are not brought into contact with each other, and the weakly acidic chlorinated water can suppress generation of chlorine gas. Hereinafter, the third supply path 7 will be described in detail.

  In the third supply path 7, flow resistance is generated, and the hydrochloric acid aqueous solution diluted in the first mixing / dilution unit 32 and the hypochlorite aqueous solution diluted in the second mixing / dilution unit 42 are mixed and diluted. 3rd dilution part 61 which generates weak acidic chlorine water of predetermined pH, and the 3rd flow control valve (for example, needle) which adjusts the flow volume of weak acidic chlorine water generated by the 3rd mixed dilution part 61 Valve) 62 is provided.

  The inner diameter of the third mixing / dilution unit 61 is larger than the inner diameter of the third supply path 7, and a plate member 63 having a plurality of through holes 63 a formed in the middle thereof. As a result, a flow resistance against the hypochlorite aqueous solution and the diluted water that has flowed into the third mixed dilution section 61 is generated in a portion upstream of the plate member 63 of the third mixed dilution section 61, and hydrochloric acid is generated. A region (hereinafter referred to as “third reaction region”) 64 in which the aqueous solution and the dilution water are mixed is formed.

  The third mixing / dilution unit 61 further uniformly dilutes the aqueous hydrochloric acid solution and the diluting water diffused through the through hole 63a of the plate member 63 in the downstream portion of the plate member 63 (hereinafter referred to as “third”). 65) (referred to as “stable region”). The hydrochloric acid aqueous solution and the hypochlorite aqueous solution diluted to a predetermined concentration and supplied to the third supply path 7 are mixed in the third reaction region 64 for a predetermined time by the flow resistance of the plate member 63, and the through holes of the plate member 63 are mixed. By passing through 63a, it diffuses into the third stable region 65, and by passing through the third stable region 65, it becomes weakly acidic chlorinated water that is uniformly diluted and adjusted to a predetermined pH.

  The third flow rate adjustment valve 62 is provided on the downstream side of the third mixing / dilution unit 61. By operating the third flow rate adjustment valve 62, the pressure of the third mixing / dilution unit 61 is adjusted, It is possible to adjust the flow rate of the weakly acidic chlorinated water generated by the three-mixing / dilution unit 61.

  The internal pressures of the first mixing dilution unit 32, the second mixing dilution unit 42, and the third mixing dilution unit 61 are the first flow rate adjustment valve (pressure adjustment valve) 33 and the second flow rate adjustment valve (pressure adjustment valve) 43. By operating the third flow rate regulating valve (pressure regulating valve) 62, both are maintained at 0.2 Mpa or more.

  The control device 8 includes a controller (hereinafter referred to as “first controller”) 71 that controls the first infusion pump 56 of the first supply device 4 and a controller (hereinafter referred to as “the first controller” hereinafter) that controls the second infusion pump 59 of the second supply device 6. 72, a flow indicator 73 that takes in data of the flow meter 23 of the main supply path 2 and transmits the value to the second controller 72, and weakly acidic chlorine supplied from the third supply path 7 A temperature indicator 74 that displays the temperature of water, a pH indicator controller 75 that displays the pH of weakly acidic chlorine water, a chlorine concentration indicator 76 that displays the chlorine concentration of weakly acidic chlorine water, a recorder 77, and the like are provided. .

  The control device 8 controls the first supply device 4 and the second supply device 6 to produce weakly acidic chlorinated water having a predetermined pH set in advance. That is, the control device 8 determines the amount of the aqueous hydrochloric acid solution to be supplied to the first supply path 3 and the amount of the hypochlorite aqueous solution to be supplied to the second supply path 5 by flow rate proportional control. Specifically, the control device 8 reads the flow rate data of the dilution water measured by the flow meter 23 with the flow rate indicator 73, and the second controller 72 is based on the flow rate data sent from the flow rate indicator 73. The amount of hypochlorite aqueous solution to be supplied to the first supply path 3 in proportion to the flow rate data is determined. Then, the second controller 72 operates the second injection pump 59 of the second supply device 6 to send the determined amount of hypochlorite aqueous solution to the second supply path 5.

  Then, the first controller 71 determines the amount of the hydrochloric acid aqueous solution to be supplied to the first supply path 3 according to the amount of the hypochlorite aqueous solution determined by the second controller 72. The amount of the hydrochloric acid aqueous solution is proportional to the amount of the hypochlorite aqueous solution. Furthermore, the first controller 71 operates the first injection pump 56 of the first supply device 4 to send the determined amount of aqueous hydrochloric acid solution to the second supply path 5. As described above, the second supply device 6 is controlled to supply a hypochlorite aqueous solution in an amount corresponding to the flow rate of the dilution water measured by the flow meter 23, and the first supply device 4 Control is performed to supply an aqueous hydrochloric acid solution in an amount corresponding to the amount of the hypochlorite aqueous solution supplied from the device 6.

  A temperature sensor 80, a pH sensor 81, and a chlorine concentration sensor 82 are provided on the downstream side of the third mixing and dilution unit 61 in the third supply path 7, and the temperature indicator 74 of the control device 8 is controlled by the temperature sensor 80. The measured temperature data is indicated, the pH indicating controller 75 indicates the pH value of the weakly acidic chlorinated water measured by the pH sensor 81, and the chlorine concentration indicator 76 is the weakly measured by the chlorine concentration sensor 82. The chlorine concentration of acidic chlorine water is indicated. The recorder 77 records values indicated by the temperature indicator 74, the pH indicator controller 75, and the chlorine concentration indicator 76.

  Hereinafter, a method for producing weakly acidic chlorine water using the weakly acidic chlorine water production apparatus 1 will be described.

  The weakly acidic chlorinated water manufacturing apparatus 1 supplies dilution water from the main supply path 2 to the first supply path 3 and the second supply path 5 by operating the water supply pump 21. The dilution water flowing through the main supply path 2 is branched (branched) into the first supply path 3 and the second supply path 5 and flows through the respective supply paths.

  The second supply device 6 is controlled by the control device 8 to supply a necessary hypochlorite aqueous solution to the second supply path 5 via the second inlet 41. The first supply device 4 is controlled by the control device 8 to supply a first aqueous solution of hydrochloric acid corresponding to the amount of hypochlorite aqueous solution supplied from the second supply device 6 through the first inlet 31. Supply to path 3.

  The aqueous hydrochloric acid solution supplied to the first supply path 3 flows into the first mixing / dilution unit 32 together with the dilution water. Then, the hydrochloric acid aqueous solution and the dilution water are mixed in the first mixing / dilution unit 32 to generate a hydrochloric acid aqueous solution having a predetermined concentration that is uniformly diluted. The hypochlorite aqueous solution supplied to the second supply path 5 flows into the second mixing dilution section 42 together with the dilution water. Then, the hypochlorite aqueous solution and the diluting water are mixed in the second mixing / dilution unit 42 to produce a hypochlorite aqueous solution having a predetermined concentration that is uniformly diluted.

  The aqueous hydrochloric acid solution diluted in the first supply path 3 and the hypochlorite aqueous solution diluted in the second supply path 5 merge in the third supply path 7 and flow into the third mixing and dilution unit 61. The hypochlorite aqueous solution and the hydrochloric acid aqueous solution are uniformly mixed and diluted by the third mixing and dilution unit 61 to become weakly acidic chlorinated water having a predetermined pH. The weakly acidic chlorinated water is supplied from the third supply path 7 to a supply target such as a washing tank for food, for example.

  According to the weakly acidic chlorinated water production apparatus 1 having the above configuration, the hydrochloric acid aqueous solution and the dilution water are mixed and uniformly diluted by the first mixing and dilution unit 32 of the first supply path 3, and the second supply path 5 The hypochlorite aqueous solution and the diluting water are mixed and uniformly diluted by the mixing and diluting unit 42, and the diluted hydrochloric acid aqueous solution and the hypochlorite aqueous solution are mixed by the third mixing and diluting unit 61 of the third supply path 7. By mixing and diluting, the hydrochloric acid aqueous solution and the hypochlorite aqueous solution are diluted stepwise, and are produced as weakly acidic chloric water that is uniform and free from unevenness. As a result, the weakly acidic chlorinated water does not contact the locally concentrated hypochlorite aqueous solution and the highly concentrated hydrochloric acid aqueous solution, and therefore can suppress generation of chlorine gas.

  Further, by providing a differential pressure gauge 51 between the first supply path 3 and the second supply path 5 upstream of the first inlet 31 and the second inlet 41, the first supply path 3 and the second supply path. When the pressure difference of 5 occurs, the first flow rate adjustment valve 33 of the first supply path 3 or the second flow rate adjustment valve 43 of the second supply path 5 is operated to eliminate the pressure difference, thereby The flow rate of the dilution water flowing through the supply path 3 and the second supply path 5 can be made equal.

  Further, by providing a plate member (baffle plate) 34 in the middle of the first mixing / dilution unit 32, a flow resistance (pressure resistance) is generated in the first reaction region 35 on the upstream side of the plate member 34. By mixing the aqueous hydrochloric acid solution and the diluting water that have flowed into the reaction region 35 for a certain period of time, and passing these through the through holes 34a of the plate member 34 and diffusing into the first stable region 36, the aqueous hydrochloric acid solution is evenly distributed. It will be diluted uniformly.

  Similarly, by providing a plate member (baffle plate) 44 in the middle of the second mixing / dilution unit 42, a flow resistance (pressure resistance) is generated in the second reaction region 45 on the upstream side of the plate member 44. 2 The hypochlorite aqueous solution and the dilution water that have flowed into the reaction region 45 are mixed for a certain period of time, and further, these are passed through the through-hole 44a of the plate member 44 and diffused into the second stable region 46, so that The aqueous chlorite solution is diluted uniformly without unevenness.

  Similarly, by providing a plate member (baffle plate) 63 in the middle of the third mixing / dilution unit 61, a flow resistance is generated in the third reaction region 64 on the upstream side of the plate member 63, and the third reaction region 64. The aqueous hydrochloric acid solution and the hypochlorite aqueous solution that flowed into the plate member are mixed for a certain period of time, and further, these are passed through the through holes 63a of the plate member 63 and diffused into the third stable region 65, whereby the aqueous hydrochloric acid solution and the hypochlorous acid solution are mixed. The aqueous chlorate solution is evenly mixed and diluted evenly, producing weakly acidic chlorinated water that hardly generates chlorine gas.

  Further, a flow meter 23 is provided in the main supply path 2, and the controller 8 supplies a hypochlorite aqueous solution in an amount (proportional) corresponding to the amount of dilution water measured by the flow meter 23. 2 controls the supply device 6 and controls the first supply device 4 so as to supply an aqueous hydrochloric acid solution in an amount proportional to the amount of the hypochlorite aqueous solution supplied from the second supply device 6. Thus, weakly acidic chlorine water having a predetermined concentration and a predetermined pH can be reliably generated.

  In addition, this invention is not restricted to said embodiment, A various change and deformation | transformation are possible. For example, in the case of the above embodiment, the shape of the tank main body 551, 581 is not particularly limited, but the shape of the tank main body 5510 is a non-circular cross section (see FIGS. 7A and 7B) or a circular shape. The cross section of the tank body 5810 may be circular (see FIGS. 8A and 8B) or non-circular. In short, the tank bodies 551 and 581 may have different outer shapes, that is, at least one of size and shape. However, in FIGS. 7 and 8, the configuration of the on-off valves 5530 and 5830 is the same as in FIGS. 3 and 4. The shape of the insertion portions 552 and 582 may be non-circular or circular in cross section. Also in this case, similar to the tank main bodies 551 and 581, the outer shape, that is, at least one of the size and the shape may be different. In addition, concave portions or convex portions for fitting the concave and convex portions are formed on the outer surfaces of the tank main bodies 551 and 581 and the insertion portions 552 and 582, and the number of the concave portions or convex portions is prevented depending on the number of the concave portions or convex portions. You may do it.

  In the case of the above embodiment, the positions of the insertion portions 552 and 582 and the outflow holes 552a and 582a are arranged at the center of the bottom of the tank main bodies 551 and 581. 552a and 582a may be arranged at different positions in the center.

  In the above embodiment, the two-fluid mixing device has been described as an example, but it goes without saying that the present invention can also be applied to a device that supplies each fluid individually.

  In the embodiment, the adjustment member 561a is provided in the upper receiving portion 561 of the first receiving body 560. However, a receiving body corresponding to the outer diameter of the tank main body 551 of the first storage tank 550 is used. It may be. That is, you may make it produce the 1st and 2nd receiving bodies 560 and 590 separately.

  DESCRIPTION OF SYMBOLS 1 ... Weakly acidic chlorine water manufacturing apparatus, 2 ... Main supply path, 3 ... 1st supply path, 4 ... 1st supply apparatus, 5 ... 2nd supply path, 6 ... 2nd supply apparatus, 7 ... 3rd supply path, DESCRIPTION OF SYMBOLS 8 ... Control apparatus, 31 ... 1st inlet, 32 ... 1st mixing dilution part, 33 ... 1st flow control valve, 34 ... Plate member, 34a ... Through-hole, 41 ... 2nd inlet, 42 ... 2nd mixing Dilution part 43 ... 2nd flow regulating valve 44 ... Plate member 55, 58 ... 1st and 2nd storage part 56, 59 ... Infusion pump 550, 580, 5500, 5800 ... 1st and 2nd storage tank 551, 581, 5510, 5810 ... tank body, 551a, 581a ... male screw, 552, 582, 5520, 5820 ... lid (insertion part), 552a, 582a, 5520a, 5820a ... outflow hole, 553, 583, 5530, 5830 ... Open / close valve, 553a, 5 3a, 5530a, 5830a ... valve rod, 553b, 583b, 5530b, 5830b ... spring, 553c, 583c, 5530c, 5830c ... valve seat, 553d, 583d, 5530d, 5830d ... packing, 554, 584, 5540, 5840 ... mouth , 555, 585, 5550, 5850 ... handle, 560, 590 ... first and second receivers, 561, 591 ... upper receiving portion, 561a ... adjusting member, 562, 592 ... lower receiving portion, 563, 593 ... projection , 564, 594 ... communication hole, 570, 600 ... first and second supply containers, 571, 601 ... mounting portion, 572, 602 ... receiving portion, 573, 603 ... discharge hole, 574, 604 ... joint, 61 ... first 3 mixed dilution sections.

Claims (1)

A tank body (551, 581) having a circular cross section, an on-off valve (553, 583) provided in an outflow hole (552a, 582a) at the bottom of the tank body (551, 581), and the on-off valve (553, 553) 583), the first and second storage tanks (550) have an insertion portion (552, 582) formed at the bottom of the tank body (551, 581) and store two kinds of fluids separately. , 580),
An upper receiving part (561, 591) through which the tank body (551, 581) is inserted and removed, a lower receiving part (562, 592) through which the insertion part (552, 582) is inserted, and an on-off valve (553, 553) 583) first and second receivers (560, 590) having protrusions (563, 593) provided in the lower receiving parts (562, 592) to push open,
First and second supply paths (3, 3) for circulating fluid in storage tanks (550, 580) attached to the respective receivers (560, 590) through the outflow holes (552a, 582a) to the downstream side. 5) a fluid supply device comprising:
The cross section of the tank main body (551) of the first storage tank (550) is smaller in diameter than the cross section of the tank main body (581) of the second storage tank (580), and the insertion portion (552) of the first storage tank (550). ) Is larger than the cross section of the insertion portion (582) of the second storage tank (580),
Each of the receivers (560, 590) includes an upper receiver (561, 591) and a lower part corresponding to the outer shape of the tank body (551, 581) and the insertion part (552, 582) of each storage tank (550, 580). Side receiving part (562, 592),
An inner diameter of the upper receiving portion (561) of the first receiving body (560) through which the tank body (551) having a small outer diameter is inserted and removed is larger than an outer diameter of the tank body (551) having a small outer diameter. large and I the upper receiving portion inner diameter and the same der of (591) of the second receiving member large the tank body of an outer diameter (581) is inserted and removed (590),
The inner diameter of the first receiver (560) is adjusted by the adjusting member (561a) inserted into the first receiver (560) in accordance with the outer diameter of the tank body (551) having the smaller outer diameter. A fluid supply device.

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