JP2004143004A - Production apparatus of aqueous chlorine dioxide solution - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a production apparatus of an aqueous chlorine dioxide solution with a simple structure that is extremely miniaturized and is easy to carry with, and that is capable of immediately manufacturing a required concentration of the aqueous chlorine dioxide solution. <P>SOLUTION: The production apparatus of the aqueous chlorine dioxide solution has a mechanism that supplies sodium chlorite and hydrochloric acid or citric acid to a reaction chamber 12 of a reaction device 10 to produce chlorine dioxide and performs the production of chlorine dioxide water by adding water in a mixing chamber 13 of the reaction device 10. The production apparatus is separately provided with the reaction chamber 12 having feed hoppers 12a, 12b of the sodium chlorite and the hydrochloric acid or citric acid, and the mixing chamber 13 having a feed hopper 13a of water in a main body 11 constituting the reaction chamber 10, wherein a first connecting pipe 14 which extends to the reaction chamber 12 side is fitted to a first connecting hole 11a formed between the reaction chamber 12 and the mixing chamber 13 so that the sodium chlorite and the hydrochloric acid or citric acid supplied to the outside of the first connecting pipe 14 are supplied to the mixing chamber 13 from the top 14a of the first connecting pipe 14 while causing them to react with each other in the reaction chamber 12 constituting the outer periphery of the first connecting pipe 14. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for producing chlorine dioxide water for disinfecting foods such as water and vegetables, or kitchen equipment and the like, and in particular, does not need to be fixedly installed at a site to be disinfected, and can be carried around. The present invention relates to a chlorine dioxide water generator having a simple structure.
[0002]
[Prior art]
As a method for disinfecting foods such as water and vegetables, or kitchen equipment, use chlorine dioxide, ozone, ultraviolet light, or chloramine instead of the conventional method using chlorine. Are being studied, and among them, the method using "chlorine dioxide" has attracted attention. This is because chlorine dioxide is 2.6 times as oxidizing as chlorine and has high persistence.
[0003]
On the other hand, chlorine dioxide is a gas having a boiling point of 11 ° C., and is not only highly reactive and easily decomposed, but also becomes unstable when compressed, so that it is difficult to store it. The generator is installed and used.
[0004]
Examples of the chlorine dioxide generators conventionally used include those using "hypochlorous acid" or "sodium bisulfite" as a starting material (for example, Patent Document 1 or Patent Document 2), and those using " There is a "chloric acid aqueous solution" (for example, Patent Literature 3 or Patent Literature 4), which can produce chlorine dioxide water at a required concentration at the installation location.
[0005]
[Patent Document 1] Japanese Patent Application Laid-Open No. 2002-220207, abstract and representative figures thereof, description of paragraphs 15 and 16 [Patent Document 2] Japanese Patent Application Laid-Open No. 2001-276841, abstract and representative drawings thereof, description of paragraphs 6 and 7 [Patent Document 3] Japanese Patent Application Laid-Open No. 2000-264606, description of abstract and representative figure thereof [Patent Document 4] Japanese Patent Application Laid-Open No. 2000-185908, description of abstract and representative figure thereof, description of paragraph 5
[Problems to be solved by the invention]
However, at least the chlorine dioxide generators described in Patent Literatures 1 and 2 must first produce chlorous acid from "hypochlorous acid" or "sodium bisulfite", so that the apparatus becomes larger accordingly. It is inevitable.
[0007]
In the production apparatus described in Patent Literature 3, "hypochlorite is supplied in a stoichiometric excess with respect to chlorite, and 15 wt% or less of chlorine dioxide to be produced. It is necessary to “produce chlorine-containing chlorine dioxide water” (means for solving the problem in the abstract). In the production apparatus described in Patent Document 4, “the supply amount of each raw material aqueous solution to the reaction column and the water Is controlled by an electric signal ”(described in paragraph 5).
[0008]
In other words, the chlorine dioxide generators described in Patent Documents 1 to 4 all have to be increased in size, and inevitably become "installed chlorine dioxide (water) generators". Things.
[0009]
By the way, if the place to be disinfected is large and fixed, such as a pool or public bath, even if it is a chlorine dioxide generator of the above-mentioned installation type, it should exhibit its function efficiently. However, for example, in a facility such as a hospital having many hospital rooms or a nursing home where many residents are located, it is not possible to install the above-described chlorine dioxide generator in each room or section. Further, in disinfecting a kitchen at each restaurant, it is not possible to provide a large chlorine dioxide generator as described above. Of course, when disinfecting foods such as vegetables and kitchens, or when disinfecting by visiting each household, the chlorine dioxide used is not so large, and is described in Patent Documents 1 to 4 described above. Chlorine dioxide generators that are as large as these often become useless long ones.
[0010]
Therefore, the present inventors can easily bring them into places where food poisoning has occurred, hospital rooms where hospital-acquired infections have occurred, and where it is not normally assumed to install a large chlorine dioxide generator at all. Moreover, as a result of various studies on how to make a chlorine dioxide generator capable of producing a necessary amount of chlorine dioxide water on the spot, the present inventors have completed the present invention.
[0011]
That is, an object of the present invention is to provide a chlorine dioxide water generating apparatus having a simple structure, which is very small in size and easy to carry, and can immediately produce chlorine dioxide water of a required concentration. Is to do.
[0012]
[Means for Solving the Problems]
In order to solve the above problems, first, means adopted by the invention according to claim 1 will be described with reference numerals used in the description of the embodiments described below.
"Sodium chlorite and hydrochloric acid or citric acid are supplied to the reaction chamber 12 of the reactor 10 to generate chlorine dioxide, and water is added thereto in the mixing chamber 13 of the reactor 10 to generate chlorine dioxide water. An apparatus 100 for producing chlorine dioxide water to be performed,
A reaction chamber 12 having supply ports 12a and 12b for the sodium chlorite and hydrochloric acid or citric acid and a mixing chamber 13 having a supply port 13a for water are formed in a substrate 11 constituting the reaction apparatus 10 by partitioning the reaction chamber. A first communication pipe 14 extending toward the reaction chamber 12 is attached to a first communication hole 11a formed between the reaction chamber 12 and the mixing chamber 13,
The sodium chlorite and hydrochloric acid or citric acid supplied to the outside of the first communication tube 14 react while reacting in the reaction chamber 12 which is the outer periphery of the first communication tube 14. 14. A chlorine dioxide water generating apparatus 100 characterized in that it is supplied from the tip 14a of 14 into the mixing chamber 13.
It is.
[0013]
That is, the apparatus 100 for producing chlorine dioxide water according to claim 1 uses sodium chlorite and hydrochloric acid or citric acid as starting materials, as in the apparatuses described in Patent Documents 3 and 4. These starting materials are each stored in the first tank 20 and the second tank 30 shown in FIG. Then, these sodium chlorite and hydrochloric acid or citric acid are supplied to the reaction chamber 12 of the reactor 10 to generate chlorine dioxide, and water is added thereto in the mixing chamber 13 of the reactor 10 to add chlorine dioxide. It produces water.
[0014]
A reaction chamber 12 having supply ports 12a and 12b for supplying aqueous solutions of sodium chlorite and hydrochloric acid or citric acid, as shown in FIG. A mixing chamber 13 having a water supply port 13a is formed so as to be partitioned, and a first communication hole 11a formed between the reaction chamber 12 and the mixing chamber 13 has a first communication hole 11a extending toward the reaction chamber 12 side. One communication pipe 14 is attached.
[0015]
That is, in the reaction chamber 12, a reaction that is the “sum” of the vertical length of the reaction chamber 12 itself and the length of the first communication pipe 14 erected substantially at the center of the reaction chamber 12. The flow path is formed as shown by the arrow in FIG. Therefore, the aqueous solution of sodium chlorite and hydrochloric acid or citric acid supplied to the outside of the first communication pipe 14 reacts in the reaction chamber 12 on the outer circumference of the first communication pipe 14 to produce chlorine dioxide. Is supplied from the distal end 14a of the first communication pipe 14 into the mixing chamber 13. Of course, even in the first communication pipe 14, the sodium chlorite and hydrochloric acid or citric acid flow down while reacting.
[0016]
In other words, since the generator 100 has the first communication pipe 14 interposed in the reaction chamber 12, the first communication pipe 14 ensures that sodium chlorite reacts with hydrochloric acid or citric acid. Thus, a reaction space is formed in the small reaction chamber 12, and chlorine dioxide can be reliably generated.
[0017]
The water containing chlorine dioxide sent into the mixing chamber 13 is further diluted with water or tap water supplied from a supply port 13a formed in a part of the mixing chamber 13 to have a predetermined concentration. Chlorine dioxide water is formed. The chlorine dioxide water is taken out from the outlet 13b formed in a part of the mixing chamber 13.
[0018]
As described above, since the generator 100 forms chlorine dioxide water at a predetermined concentration, chlorine dioxide is generated in a short time, diluted with water or tap water, and used as a disinfectant. Is immediately discharged from the outlet 13b, and the generated chlorine dioxide does not deteriorate. In addition, by adjusting the concentration of the starting material in the first tank 20 or the second tank 30 and the amount of water or tap water sent from the supply port 13a, the concentration of chlorine dioxide can be freely set, and the concentration of chlorine dioxide can be used as it is as a disinfectant. It can be used at the concentration used or can be produced as a stock solution to be used after further dilution with water.
[0019]
As described above, since the chlorine dioxide water having a required concentration is reliably formed in the reactor 10 by the generator 100 according to the first aspect, the chlorine dioxide aqueous solution is supplied from the outlet 13 b of the base 11. The object to be disinfected can be easily disinfected by spraying or spraying the object to be disinfected as it is or by further diluting it with water.
[0020]
The components, pipelines, wirings, and the like constituting the generating apparatus 100 as shown in FIG. 1 are put together in one case large enough to be transported by hand. If wheels and the like are attached to this case, sufficient sterilization can be performed by drawing the case around even if the location to be disinfected is wide.
[0021]
Therefore, the generator 100 is very compact and easy to carry, and can immediately produce chlorine dioxide water at a required concentration.
[0022]
Further, in order to solve the above-mentioned problem, a means adopted by the invention according to claim 2 is as follows.
An auxiliary mixing chamber 18 communicating with the reaction chamber 12 via the second communication hole 11b is formed in a portion of the base 11 opposite to the reaction chamber 12 with respect to the mixing chamber 13, and the second communication A second communication pipe 15 extending toward the auxiliary mixing chamber 18 is attached to the hole 11b,
Chlorine dioxide supplied through the second communication pipe 15 is sufficiently mixed with water during the passage from the tip 15a of the second communication pipe 15 to the inside of the auxiliary mixing chamber 18 so that the base 11 That the required concentration of chlorine dioxide water can be taken out from the outlet 13b formed at the bottom. "
It is.
[0023]
That is, as shown in FIG. 2, the generating apparatus 100 according to claim 2 includes a second communication hole 11 b in the reaction chamber 12 in a portion of the base 11 opposite to the reaction chamber 12 with respect to the mixing chamber 13. And a second communication pipe 15 extending toward the auxiliary mixing chamber 18 is attached to the second communication hole 11b. That is, in the generator 100, the auxiliary mixing chamber 18 is connected to the mixing chamber 13 so that the space for diluting chlorine dioxide with water or tap water can be easily formed without increasing the size of the base 11. That is, the second communication pipe 15 is extended into the auxiliary mixing chamber 18 to make the dilution flow path as long as possible.
[0024]
In other words, the chlorine dioxide supplied through the second communication pipe 15 passes through the second communication pipe 15 and is sufficiently mixed with water during a period from the tip 15 a to the inside of the auxiliary mixing chamber 18. Therefore, it is taken out from the outlet 13b formed in the base 11 as chlorine dioxide water having a required concentration. That is, the second communication pipe 15 extending into the auxiliary mixing chamber 18 sufficiently mixes the chlorine dioxide supplied into the mixing chamber 13 with water or tap water.
[0025]
Therefore, the generating device 100 according to the second aspect has the same function as that of the first aspect, and has been sent into the mixing chamber 13 due to the presence of the auxiliary mixing chamber 18 and the second communication pipe 15. The dilution of chlorine dioxide with water or tap water has become much more complete.
[0026]
Further, in order to solve the above-mentioned problem, a means adopted by the invention according to claim 3 relates to a chlorine dioxide water generating apparatus 100 according to claim 2 described above.
"Incorporation of a static mixer 16 in the second communication pipe 15"
It is.
[0027]
That is, the generator 100 according to the third aspect is characterized in that the static mixer 16 is built in the second communication pipe 15 of the generator 100 according to the second aspect. Dilution of chlorine with water or tap water is performed more reliably.
[0028]
BEST MODE FOR CARRYING OUT THE INVENTION
Now, the invention according to each of the claims configured as described above will be described with respect to a generating apparatus 100 which is an embodiment shown in the drawings. It is included in.
[0029]
FIG. 1 is an exploded perspective view showing important components of the production apparatus 100. The production apparatus 100 has a reactor 10 as shown in FIG. 2 built in a case (not shown). It is a thing. The case (not shown) is one that can be transported by attaching a dolly to the bottom surface thereof. The first tank 20 and the second tank 30, the water connection pipe 40, and the It has a built-in panel 50.
[0030]
As shown in FIG. 2, the reaction apparatus 10 includes an integrated substrate 11, a reaction chamber 12 formed in an upper part thereof, and a mixing chamber 13 formed in a lower part thereof. The mixing chamber 12 and the mixing chamber 13 are formed in a central portion of the base 11 and communicate with each other through a space in which a supply port 13a to which a water connection pipe 40 is connected is opened.
[0031]
In the generator 100 of the present embodiment, the base 11 is formed of a transparent or translucent material, which allows the flow state and reaction in the reaction chamber 12 and the first communication pipe 14 to be described later. The state can be seen from outside. If the flow and the reaction state in the base 11 can be visually recognized from the outside, not only can the occurrence of a trouble during the disinfection work be predicted in advance, but also the maintenance time can be easily confirmed.
[0032]
In the reaction chamber 12, a first supply port 12a to which a pipe 23 from the first tank 20 shown in FIG. 1 is connected and a second supply port 12b to which a pipe 33 from the second tank 30 is connected are formed. The first supply port 12a and the second supply port 12b communicate with the lowermost end of the reaction chamber 12. A first communication hole 11a communicating with the mixing chamber 13 side is formed in the base 11, which is the lower end of the center of the reaction chamber 12, and a first communication pipe 14 is attached to the first communication hole 11a. The distal end 14 a of the first communication pipe 14 is opened at the upper end of the reaction chamber 12.
[0033]
On the other hand, at the upper end side of the mixing chamber 13 to which the supply port 13a communicates, an outlet 13b to which the water supply passage 17 is connected is formed, and at the lower end of the mixing chamber 13 An auxiliary mixing chamber 18 is provided. The auxiliary mixing chamber 18 substantially expands the space of the mixing chamber 13, and in the present embodiment, the auxiliary mixing chamber 18 is formed of a transparent or anti-transparent material. The reason why the auxiliary mixing chamber 18 is formed of a transparent or translucent material is that the dilution state in the auxiliary mixing chamber 18 can be easily visually recognized from the outside, and the occurrence of troubles during disinfection work is made in advance. This is because not only can it be predicted, but also the maintenance time can be easily confirmed.
[0034]
A second communication hole 11b is formed in the substrate 11 located between the mixing chamber 13 and the supply port 13a, and a second communication pipe 15 is attached to the second communication hole 11b. The second communication pipe 15 is for substantially increasing the length of the dilution flow path, and extends into the auxiliary mixing chamber 18 described above. It is open. Further, as shown in FIG. 2, a static mixer 16 for ensuring the mixing action is built in the second communication pipe 15. At the lower end of the auxiliary mixing chamber 18, there is provided a drain valve 19 used for discharging surplus substances and cleaning the inside.
[0035]
As shown in FIG. 1, the first tank 20 and the second tank 30 are connected to the reactor 10 configured as described above via the first metering pump 21 and the second metering pump 31. That is, the first metering pump 21 pumps the sodium chlorite solution from the first tank 20 into the reaction chamber 12 through the pipe 23 connected to the first supply port 12a, and the second metering pump 31 The hydrochloric acid or citric acid solution from the second tank 30 is sent into the reaction chamber 12 through a pipe 33 connected to the second supply port 12b. These first and second metering pumps 21 and 31 are of a so-called electromagnetic drive type, and their output flow rates are kept constant and are electrically controlled by a control panel 50 described later. For this purpose, signal lines 22 and 32 for receiving or transmitting signals from the control panel 50 extend from the first and second metering pumps 21 and 31 toward the control panel 50, respectively.
[0036]
The generator 100 according to the present embodiment uses ordinary tap water as dilution water, and has a water supply connection pipe 40 for sending tap water to the supply port 13a of the reaction device 10. As shown in FIG. 1, the water connection pipe 40 is provided with a check valve 41, a flow adjustment valve 42, and a flow meter 43. In particular, the flow meter 43 is provided inside the water connection pipe 40 at that time. A signal line 44 for converting the flow rate into a signal and sending the signal to the control panel 50 is connected.
[0037]
The control panel 50 literally controls the generating apparatus 100, and displays the flow rate of chlorine dioxide water on the flow rate display section 51 shown in FIG. The concentration indicating section 52 of the control panel 50 indicates and displays the concentration of chlorine dioxide water to be used, and the first and second metering pumps 21 and 31 operate according to the instruction from the concentration indicating section 52. The supply amount can be adjusted according to the flow rate of tap water flowing in the water connection pipe 40.
Further, the output indicating section 53 of the control panel 50 indicates and displays the required amount of chlorine dioxide water to be used, and controls the driving of the first and second metering pumps 21 and 31 and the flow control valve 42. It adjusts the flow rate of tap water.
[0038]
【The invention's effect】
As described in detail above, in the present invention,
"Sodium chlorite and hydrochloric acid or citric acid are supplied to the reaction chamber 12 of the reactor 10 to generate chlorine dioxide, and water is added thereto in the mixing chamber 13 of the reactor 10 to generate chlorine dioxide water. An apparatus 100 for producing chlorine dioxide water to be performed,
A reaction chamber 12 having supply ports 12a and 12b for the sodium chlorite and hydrochloric acid or citric acid and a mixing chamber 13 having a supply port 13a for water are formed in a substrate 11 constituting the reaction apparatus 10 by partitioning the reaction chamber. A first communication pipe 14 extending toward the reaction chamber 12 is attached to a first communication hole 11a formed between the reaction chamber 12 and the mixing chamber 13,
The sodium chlorite and hydrochloric acid or citric acid supplied to the outside of the first communication tube 14 react while reacting in the reaction chamber 12 which is the outer periphery of the first communication tube 14. 14 is supplied into the mixing chamber 13 from the tip 14a. "
The main feature of the apparatus is that the apparatus 100 for producing chlorine dioxide water, which can be made very small in size and easy to carry, and can immediately produce chlorine dioxide water of a required concentration, has a simple structure. It can be provided.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a generator according to the present invention.
FIG. 2 is an enlarged vertical cross-sectional view of a reactor constituting the production apparatus.
[Explanation of symbols]
REFERENCE SIGNS LIST 100 generator 10 reactor 11 base 11a first communication hole 11b second communication hole 12 reaction chamber 12a first supply port 12b second supply port 13 mixing chamber 13a supply port 13b outlet 14 first communication pipe 14a tip 15 second Communication pipe 15a Tip 16 Static mixer 17 Water supply channel 18 Auxiliary mixing chamber 19 Drain valve 20 First tank 21 First metering pump 22 Signal line 23 Pipe 30 Second tank 31 Second metering pump 32 Signal line 33 Pipe 40 Water supply pipe 41 Check valve 42 Flow rate adjusting valve 43 Flow meter 44 Signal line 50 Control panel 51 Flow rate display section 52 Concentration indicating section 53 Output indicating section

Claims (3)

Chlorine dioxide is supplied by supplying sodium chlorite and hydrochloric acid or citric acid to the reaction chamber of the reactor to generate chlorine dioxide, and adding water thereto in the mixing chamber of the reactor to generate chlorine dioxide water. A generator of
A reaction chamber having a supply port for the sodium chlorite and hydrochloric acid or citric acid and a mixing chamber having a supply port for water are formed in a substrate constituting the reaction apparatus by partitioning the reaction chamber. A first communication pipe extending toward the reaction chamber is attached to a first communication hole formed between the chamber and the mixing chamber,
The sodium chlorite and hydrochloric acid or citric acid supplied to the outside of the first communication pipe react from the tip of the first communication pipe while reacting in the reaction chamber on the outer circumference of the first communication pipe. An apparatus for producing chlorine dioxide water, wherein the apparatus is supplied into the mixing chamber. An auxiliary mixing chamber communicating with the reaction chamber via a second communication hole is formed in a portion of the base opposite to the reaction chamber with respect to the mixing chamber, and the second communication hole is formed in the second communication hole. Attach the second communication pipe extending to the auxiliary mixing chamber side,
Chlorine dioxide supplied through the second communication pipe is sufficiently mixed with water between the tip of the chlorine dioxide and the auxiliary mixing chamber through the second communication pipe, and an outlet formed in the base is formed. The chlorine dioxide water generating apparatus according to claim 1, wherein the chlorine dioxide water having a required concentration can be taken out of the apparatus. The apparatus for producing chlorine dioxide water according to claim 2, wherein a static mixer is built in the second communication pipe.

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