JP2004290870A - Reduction potential adjusting process and apparatus for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reduction potential adjusting method and an apparatus for the same, which simplify process work to make mass process efficient and reduce a variety of costs so as to improve a dissolution rate of a hydrogen gas and ensure safety. <P>SOLUTION: The reduction potential adjusting method for use in the apparatus includes the following processes of; dissolving the hydrogen gas turned into fine bubbles in a liquid, recovering the part of the hydrogen gas that does not dissolve into the liquid but separate from it, and turning the recovered hydrogen gas into fine bubbles and dissolve them in the liquid. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and an apparatus for adjusting a reduction potential in reducing hydrogen water.
[0002]
[Prior art]
Conventional hydrogen gas dissolving methods used to adjust the reduction potential of reducing hydrogen water include an advanced treatment method in which a liquid is degassed in a first step and a hydrogen gas dissolving treatment is performed in a second step. (For example, see Patent Documents 1 and 2)
There is also a simple processing method for dissolving hydrogen gas by causing hydrogen gas to be made into fine bubbles and flowing into the liquid in the pipe, followed by stirring. (For example, see Patent Document 3)
[0003]
[Patent Document 1]
JP-A-11-77021 ([0005] lines 9 to 22)
[Patent Document 2]
Japanese Patent No. 2890342 ([0005] lines 2 to 11)
[Patent Document 3]
JP-A-2000-354696 ([0004] Lines 1 to 4, [FIG. 1])
[0004]
By the way, the primary treatment in the advanced treatment method includes, for example, vacuum degassing, decompression film degassing, etc., and in any case, requires a degassing device and a management technician thereof, and further requires a considerable processing time. ing.
For the secondary treatment, for example, there are a gas permeable membrane, simple bubbling, in-line mixing, and the like. It is necessary to consider a solution for the treatment of dissolved hydrogen gas.
As described above, in the conventional advanced processing method, it is possible to eliminate the complexity of the processing work by dividing the processing into the primary processing and the secondary processing, to reduce the equipment required for the processing work, the management technician, and to further reduce the processing time and the processing time. The challenge is to reduce the production cost, which is high due to dissolved hydrogen gas processing.
[0005]
As a means for solving the problem in the conventional advanced processing method, if the simple processing method described above is used, the dissolution processing is performed without degassing processing, so that the processing work is not complicated and the production cost is reduced. It seems to do.
However, since hydrogen gas itself is hardly soluble, it is difficult to dissolve a large amount of hydrogen gas in a short time, and there is a possibility that some hydrogen gas may flow out in a bubble state.
In addition, since the degassing process has not been performed, the dissolved gas in the liquid appears as bubbles as the dissolution of the hydrogen gas progresses, and the bubbles of the dissolved gas are mixed with the outflowing hydrogen gas to form a dangerous gas. May occur.
In other words, in the conventional simple processing method, although the processing operation is simplified and efficient processing is possible, and various costs can be reduced, there is a problem of improving the dissolution rate of hydrogen gas and ensuring safety. Will remain.
[0006]
[Problems to be solved by the invention]
Therefore, the present invention aims at improving the dissolution rate of hydrogen gas and ensuring safety after reducing the various costs by simplifying the processing work to increase the efficiency of mass processing, and a reduction potential adjusting method for solving this problem. And the provision of such a device.
[0007]
[Means for Solving the Problems]
To achieve the above object, the present invention employs the following technical means.
The technical means includes a step of dissolving hydrogen gas that has been microbubble into liquid, a step of collecting undissolved hydrogen gas separated in liquid, and a step of dissolving hydrogen gas that has been collected into microbubble. This is a method for adjusting the reduction potential including: (Claim 1)
[0008]
Further, in one of the water tanks, a step of dissolving the microbubble hydrogen gas in the liquid, a step of collecting the undissolved hydrogen gas separated in the liquid, and in the other water tank, The method is a reduction potential adjusting method including a step of converting into a liquid by dissolving in a liquid, and a step of exhausting a part of the recovered low-concentration hydrogen gas and a dissolved gas other than the hydrogen gas in the liquid. (Claim 2)
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
As shown in FIG. 1 and FIG. 2, the method of claim 1 collects an undissolved hydrogen gas separated in the liquid and an ejection part 2 for forming fine bubbles of hydrogen gas in a water tank 1 and ejecting the gas into the liquid. It can be realized by a reduction potential adjusting device A including a recovery unit 3 that performs the recovery and a sub-blowing unit 4 that forms the hydrogen gas recovered by the recovery unit 3 into fine bubbles and blows out into the liquid. (Claim 3)
[0010]
As shown in FIGS. 3 and 4, the method of claim 2 includes at least a main water tank 1A and a sub-water tank 1B. In the main water tank 1A, hydrogen gas is finely bubbled in the water tank and jetted into the liquid. And a recovery section 3 for recovering undissolved hydrogen gas separated in the liquid. The sub-water tank 1B forms the hydrogen gas recovered by the recovery section 3 into fine bubbles and blows out into the liquid. This can be realized by a reduction potential adjusting device A including a sub-ejection unit 4 to be exhausted and an exhaust unit 6 for exhausting a part of the recovered low-concentration hydrogen gas and a dissolved gas other than hydrogen gas. (Claim 4)
[0011]
According to the reduction potential adjusting method of the first aspect and the reduction potential adjusting device of the third aspect, the hydrogen gas that is microbubble ejected into the liquid from the ejection part 2 is dissolved in the undegassed liquid.
Partially undissolved hydrogen gas is released out of the liquid, but this hydrogen gas is recovered by the recovery unit 3, and the recovered hydrogen gas is jetted out of the sub-jet unit 4 into the liquid in the form of fine bubbles to be dissolved. Is done.
[0012]
In other words, by continuously performing this processing operation as one cycle, the undissolved hydrogen gas released outside the liquid is recovered and jetted and dissolved each time without remaining in the water tank. An improvement in the gas dissolution rate is realized.
Further, since the above-described dissolution treatment is performed without degassing the liquid, the treatment operation is simplified, and a large amount of dissolution treatment can be efficiently performed.
In addition, even if a dissolved gas in the liquid appears, the dissolved gas is recovered and ejected together with the undissolved hydrogen gas released outside the liquid and dissolved in the liquid, so that the dissolved gas and the hydrogen gas are mixed. Therefore, generation of a gas having a risk due to this can be suppressed.
Therefore, it is possible to provide a reduction potential adjusting method and a device for realizing an improvement in the dissolution rate of hydrogen gas and ensuring safety while reducing processing costs by simplifying the processing operation and increasing the efficiency of mass processing. .
[0013]
Further, according to the reduction potential adjusting method of the second aspect and the reduction potential adjusting apparatus of the fourth aspect, the hydrogen gas that has been microbubbled and ejected from the ejection portion 2 is dissolved in the undegasified liquid in the main water tank 1A. Is done.
Partially undissolved hydrogen gas is released out of the liquid, but this hydrogen gas is recovered by the recovery unit 3 and the recovered hydrogen gas is discharged from the sub-jet unit 4 into the undegassed liquid in the sub-water tank 1B. It is ejected and dissolved in the form of fine bubbles.
The hydrogen gas spouted into the sub-tank 1B is separated without dissolving in the liquid in the main water tank 1A and has a lower concentration than the hydrogen gas spouted into the main water tank 1A. The undissolved hydrogen gas released in the sub water tank 1B has the lowest concentration.
Then, the lowest concentration hydrogen gas and the dissolved gas in the released liquid are exhausted to the outside of the water tank.
[0014]
In other words, by continuously performing the processing operation as one cycle, the undissolved hydrogen gas released outside the liquid is not left in the water tank, but is recovered, jetted, dissolved, and exhausted each time. An improvement in the dissolution rate of hydrogen gas is realized, and generation of a gas having a risk due to mixing of the dissolved gas and the hydrogen gas can be suppressed.
Further, since the above-described dissolution treatment is performed without degassing the liquid, the treatment operation is simplified, and a large amount of dissolution treatment can be efficiently performed.
Therefore, according to the present invention, a reduction potential adjusting method and an apparatus for realizing an improvement in the dissolution rate of hydrogen gas and ensuring safety while reducing the various costs by simplifying the processing operation to increase the efficiency of mass processing are also provided. Can be provided.
[0015]
In the case of the reduction potential adjusting device according to claim 4, the main water tank 1A and the auxiliary water tank 1B are preferably communicated with each other (claim 5), and the liquid in the main water tank 1A having a relatively high dissolved hydrogen concentration and the dissolved hydrogen concentration are preferably used. Is mixed with the liquid in the auxiliary water tank 1B having a low water content.
According to the fifth aspect of the present invention, it is possible to automatically set the dissolved hydrogen concentration of the liquid in both water tanks to the same concentration and to drain the water.
[0016]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment, FIG. 2 shows a second embodiment, FIG. 3 shows a third embodiment, and FIG. 4 shows a fourth embodiment. .
The reduction potential adjusting device A of the first embodiment and the second embodiment is a device corresponding to claim 3 for implementing the reduction potential adjusting method of claim 1.
The reduction potential adjusting device A according to the third and fourth embodiments is a device corresponding to claim 4 for implementing the reduction potential adjusting method according to claim 2.
[0017]
The reduction potential adjusting device A of the first embodiment is of a very basic form for carrying out the invention of claim 1, and includes a water tank 1, an ejection part 2, a recovery part 3, a sub-ejection part 4, It comprises a drain section 5, a tank T for hydrogen gas, and a water level sensor S.
The water tank 1 can be made in a closed state, and by closing the water tank 1, leakage of undissolved hydrogen gas and liquid dissolved gas discharged from outside of the liquid to the outside of the water tank is prevented.
The drain 5 is for discharging the liquid in the water tank 1 and is opened and closed by a valve 51.
The water level sensor S senses the water level of the liquid in the water tank and easily secures a space from which undissolved hydrogen gas is released.
[0018]
The ejection part 2 includes an ejection nozzle 21 in the water tank 1, a circulation pipe 22 for piping the ejection nozzle 21 and the inside of the water tank 1, a pump P provided in the course of the circulation pipe 22, a downstream of the pump P, and the tank. And an introduction pipe 23 for piping.
[0019]
The recovery unit 3 is a recovery pipe 31 that connects the inside of the water tank 1 and the sub-jet unit 4.
The sub-ejection unit 4 includes an ejection nozzle 41 in the water tank 1, a circulation pipe 42 for piping the ejection nozzle 41 and the inside of the water tank 1, and a pump P provided on the way of the circulation pipe 42.
The recovery pipe 31 is provided downstream of the pump P.
[0020]
Since the reduction potential adjusting device A of the second embodiment has basically the same configuration as that of the first embodiment, the description of the overlapping portions will be omitted by attaching the same reference numerals.
The water level sensor S of the reduction potential adjusting device A of the present embodiment is of a ball tap structure, and the liquid is discharged into the water tank 1 until the liquid level reaches a certain level, and the discharge of the liquid is stopped when the level reaches the certain level. It was made.
Further, a filter 52 is provided in the drain section 5 of the present embodiment, and the filter 52 filters out extremely fine hydrogen gas bubbles, thereby preventing the outflow of hydrogen gas from the drain section 5. I have.
This filter 52 is suitable for an operation of continuously performing drainage and liquid supply while dissolving hydrogen gas in the operation of the device, and is a state in which fine bubbles of hydrogen gas remain in the liquid. When the water is drained, the filter 52 filters the fine bubbles to prevent the outflow of hydrogen gas.
[0021]
The reduction potential adjusting device A of the third embodiment has a main water tank 1A and a sub water tank 1B.
In this embodiment, the description of the same parts as those in the above embodiment is omitted by attaching the same reference numerals.
The main water tank 1A is provided with the same ejection section 2 as in the above embodiment, and the sub water tank 1B is provided with the same sub ejection section 4 as in the above embodiment.
The recovery part 3 is piped over the main water tank 1A and the sub-spouting part 4.
The sub-water tank 1B is provided with an exhaust unit 6 for exhausting the released low-concentration undissolved hydrogen gas and dissolved gas in the liquid.
The main water tank 1A and the sub water tank 1B are connected by a connecting pipe 1C.
[0022]
Since the reduction potential adjusting device A of the fourth embodiment has basically the same configuration as that of the third embodiment, the description of the overlapping portions will be omitted by attaching the same reference numerals.
The reduction potential adjusting device A of the present embodiment includes a control unit 7 for controlling the operation of the device and performing unattended automatic operation.
The control unit 7 connects the dissolved hydrogen sensor 71, the electromagnetic valve 72, the exhaust gas concentration sensor 73, the exhaust fan 74, the diffusion fan 75, and the pump P to centrally control the operation thereof.
[0023]
As an example of the control of the control unit 7, the upper limit of the dissolved hydrogen concentration in the liquid in the main water tank 1A is set in advance, and when the dissolved hydrogen concentration is detected by the dissolved hydrogen sensor 71, the controller 7 It is possible to control to stop the supply of the hydrogen gas by closing the valve 72 and to stop the operation of the pump P.
In addition, an upper limit of the exhaust gas concentration in the exhaust unit is set in advance, and when the exhaust gas concentration sensor 73 detects the set exhaust gas concentration, the exhaust fan 74 is operated to blow outside air to the exhaust unit 6. It is possible to control to forcibly exhaust gas in a state where it is mixed with exhaust gas to reduce its concentration.
Further, it is possible to control the diffusion fan 75 to operate at the same time as the operation of the exhaust fan 74 to diffuse and exhaust the exhaust gas.
[0024]
It should be noted that the present invention is not limited to the structure in the illustrated embodiment, and other structures are optional within the scope described in the claims.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a first embodiment of a reduction potential adjusting device according to the present invention.
FIG. 2 is a schematic diagram showing a second embodiment.
FIG. 3 is a schematic diagram showing a third embodiment.
FIG. 4 is a schematic diagram showing a fourth embodiment.
[Explanation of symbols]
A: reduction potential adjusting device 1: water tank 1A: main water tank 1B: sub-water tank 1C: connecting pipe 2: ejection section 3: recovery section 4: sub-ejection section 6: exhaust section

Claims (5)

A step of dissolving the hydrogen gas that has been made into fine bubbles into the liquid,
Recovering undissolved hydrogen gas separated in the liquid,
A method for adjusting a reduction potential, comprising a step of forming the recovered hydrogen gas into fine bubbles and dissolving the same in a liquid. In one water tank, a step of dissolving the microbubble hydrogen gas in the liquid,
Recovering undissolved hydrogen gas separated in the liquid,
In the other water tank, a step of dissolving the recovered hydrogen gas in liquid by forming the recovered hydrogen gas into fine bubbles,
A reduction potential adjusting method including a step of exhausting a part of the collected low-concentration hydrogen gas and dissolved gas in the liquid other than the hydrogen gas. An ejection unit for forming hydrogen gas into fine bubbles in a water tank and ejecting the gas into a liquid;
A recovery unit that recovers undissolved hydrogen gas separated in the liquid,
A reduction potential adjusting device including: a sub-ejection unit for forming hydrogen gas collected in the collection unit into fine bubbles and ejecting the gas into the liquid. Including at least a main tank and a sub tank,
The main water tank includes a jetting unit for forming hydrogen gas into fine bubbles in the water tank and jetting it into the liquid, and a collecting unit for collecting undissolved hydrogen gas separated in the liquid,
The sub-water tank has a sub-jet unit that forms hydrogen gas collected in the collection unit into fine bubbles and jets them into the liquid, and an exhaust that exhausts some of the collected low-concentration hydrogen gas and dissolved gas in the liquid other than hydrogen gas. And a reduction potential adjusting device. The reduction potential adjusting device according to claim 4,
A reduction potential adjusting device in which the main water tank and the auxiliary water tank are connected.

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