JP2003071267A - Air dissolved water making apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air dissolved water making apparatus preventing the lowering of oxygen solubility. SOLUTION: In the air dissolved water making apparatus for introducing air and a liquid into a hermetically sealed atmosphere to dissolve the same in the liquid, the air in the hermetically sealed atmosphere is discharged when the ratio of gas different from air eluted from the liquid reaches a predetermined range.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for introducing a gas and a liquid into a closed atmosphere to dissolve the gas in the liquid,
The present invention relates to an apparatus for producing gas-dissolved water in which the proportion of dissolved gas is reduced with the elapse of driving time.

[0002]

2. Description of the Related Art FIG. 4 is a schematic diagram showing a gas-dissolved water producing apparatus which has been conventionally used. In the figure, for example, the water that should dissolve gas such as oxygen from a lake is pump 1
It is pumped up by and stored in a predetermined position of the container 2. The level meter 3 and the control means 4 control the pumped water so that the water level is within a predetermined range.

The valve 5 is, for example, an oxygen cylinder (not shown).
Is supplied to the container 2 having a closed atmosphere. The pressure inside the container 2 is measured by a pressure gauge 6, and is controlled by the control means 4 so that the pressure of oxygen supplied from the oxygen cylinder becomes a predetermined pressure. Water in the container 2 is drain valve 7
Be drained through.

In the above structure, the pumped water comes into contact with oxygen controlled to a predetermined pressure in the container to dissolve the oxygen. The solubility of gas in water is in equilibrium with the partial pressure of the gas in contact according to the well-known Henry's law. The water in which oxygen is dissolved is drained through the drain valve 7.

[0005]

By the way, nitrogen gas is dissolved in water (eg, lake water) in contact with air according to Henry's law, and this nitrogen gas is eluted into the oxygen gas in the container 2. It will be. Therefore, if the operation of the apparatus is continued, the concentration of nitrogen gas in the container 2 increases and the concentration of oxygen gas decreases.

FIG. 5 (a) shows the ratio of oxygen and nitrogen gas in the container 2, where the horizontal axis shows the elapsed time and the vertical axis shows the gas concentration. According to FIG. 5A, it can be seen that the proportion of oxygen gas decreases and the proportion of nitrogen gas increases with the passage of time. FIG. 5B shows that the amount of dissolved oxygen in water, which was obtained under the condition of high oxygen partial pressure, decreased with time.

[0007]

The present invention has been made to solve the above-mentioned problems, and when the ratio of nitrogen gas eluted from water reaches a predetermined range, oxygen in the container 2 An object of the present invention is to provide a gas-dissolved water production apparatus that releases a mixed gas of nitrogen and prevents a decrease in the amount of oxygen dissolved in water.

[0008]

In order to achieve this object, the present invention provides a device for introducing a gas and a liquid into a closed atmosphere and dissolving the gas in the liquid according to the first aspect of the invention. When the ratio of the gas different from the gas eluted from the liquid reaches a predetermined range, the gas in the closed atmosphere is discharged.

In the present invention, the liquid supply means for supplying the liquid to the tank, the gas supply means for supplying the gas to the tank, and the liquid level of the liquid supplied to the tank are controlled to a predetermined height. Liquid level control means, pressure control means for controlling the pressure of the gas in the tank to a predetermined pressure, gas concentration detection means for detecting the concentration of the gas in the tank, and gas for releasing the gas in the tank When the ratio of a gas different from the gas eluted from the liquid reaches a predetermined range, the gas in the closed atmosphere is released. It is characterized in that it is configured to.

According to a third aspect of the present invention, in the gas-dissolved water producing apparatus according to the first or second aspect, the means for detecting that the proportion of the gas different from the gas has reached a predetermined range is a gas in a closed atmosphere. It is characterized in that it is any one of concentration, pressure, liquid level, drive time of the apparatus, or composite information of two or more of these.

According to a fourth aspect of the present invention, in the apparatus for producing gas-dissolved water according to the second aspect, when the gas concentration in the tank falls below a predetermined concentration, the gas releasing means is opened to supply the gas in the tank with a supply gas. It is characterized in that it is configured to be replaced with.

A fifth aspect of the present invention is characterized in that, in the apparatus for producing gas-dissolved water according to any of the first to fourth aspects, the gas is oxygen gas and the different gas is nitrogen gas.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of the essential configuration showing an example of an embodiment relating to claims 1 to 5 of the present invention. The same components as those of the conventional apparatus described with reference to FIG.

The structural feature of the present invention is that an oxygen concentration measuring means 8 for measuring the oxygen concentration in the container 2 is provided, and a valve for releasing the mixed gas in the container based on the measurement result is provided. . The details will be described below with reference to the drawings.

In FIG. 1, the water pumped up by the pump 1 is stored in the container 2 and discharged through the drain valve 7. The water level in the container 2 is maintained at a predetermined water level by the level meter 3 and the control means 4. Further, oxygen is supplied into the container 2 through a valve 5 from an oxygen cylinder (not shown).

The pressure in the container 2 is measured by the pressure gauge 6, and the measurement result is sent to the control means 4. The control means 4 opens and closes the valve 5 so that the pressure becomes a predetermined pressure. As a result, the water in the container 2 is drained from the drain valve 7 after dissolving oxygen. As described above, when the operation is continued for a certain time in this state, the gas such as nitrogen contained in the pumped water elutes, but this gas is contained in the container 2
The proportion of oxygen accumulated inside and supplied from the valve 5 is reduced.

The oxygen concentration measuring means 8 measures the oxygen concentration in the space 2a of the container 2. The control means 4 monitors the measurement results continuously or intermittently, and opens the open valve when the oxygen concentration is lower than the predetermined oxygen concentration. As a result, the mixed gas in the container 2 is released and the container 2 is filled with oxygen continuously supplied.

After a lapse of a predetermined time, the control means 4 closes the open valve 5a to control the oxygen pressure in the container 2 to a predetermined pressure. It should be noted that the on-off valve is open for a relatively short time and has little effect on the decrease in oxygen solubility in water.

FIG. 2A shows the ratio of oxygen and nitrogen gas in the container 2, where the horizontal axis shows the elapsed time and the vertical axis shows the gas concentration. According to FIG. 2A, it is understood that the proportion of oxygen gas decreases and the proportion of nitrogen gas increases as time passes, but the proportion of oxygen does not decrease by opening the open valve. FIG. 2B shows that the dissolved oxygen amount of water is maintained in a constant range regardless of the passage of time.

According to the above configuration, the oxygen concentration in the container 2 is monitored, and when the concentration decreases, the mixed gas in the container 2 is opened and only oxygen is newly supplied. It is possible to realize an apparatus for producing gas-dissolved water having high oxygen solubility in water.

FIG. 3 shows an example of another embodiment of the present invention. In this example, a pipe 1 connected to a pump 1 is shown.
A valve 5c is provided in front of a. The rest of the configuration is similar to that shown in FIG. By blowing oxygen or air into the pipe 1a from the valve 5c, the container 2
It is intended to improve the oxygen solubility as a whole by previously dissolving oxygen in water flowing into the.

In the above-mentioned embodiment, the oxygen concentration measuring means 8 is used as a means for detecting that the proportions of different gases reach the predetermined range, but attention is paid to the pressure and liquid level in the closed atmosphere. It is also possible to determine beforehand the relationship between these changes and the proportion of different gas, and judge that the proportion of gas has reached a predetermined range.

Further, since the elution degree of nitrogen is closely related to the driving time of the apparatus, the relationship may be obtained in advance and it may be judged that the gas ratio has reached a predetermined range. Further, it may be judged from the composite information of two or more of these.

The above description of the present invention has been presented only with reference to particular preferred embodiments for purposes of illustration and illustration. Accordingly, the invention is subject to many modifications without departing from its essence,
It will be apparent to those skilled in the art that variations can be made. For example, the control unit 4 displays the control based on the oxygen concentration as one block together with the control of the water level and the pressure, but it may be displayed separately for each measuring device. Further, although the valve 5c is provided in the front stage of the pump 1, it may be provided in the rear stage or both.

Further, in the embodiment, the gas melted in water is described as oxygen, but it may be other than these liquids or gas. The scope of the present invention, which is defined by the description in the scope of claims, includes changes and modifications within the scope.

[0026]

The present invention provides an apparatus for introducing a gas and a liquid into a closed atmosphere and dissolving the gas in the liquid,
When the ratio of the gas different from the gas eluted from the liquid reaches a predetermined range, the gas in the closed atmosphere is released, so that a gas-dissolved water producing apparatus in which oxygen solubility does not decrease is realized. be able to.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an example of an embodiment of an apparatus for producing gas-dissolved water according to the present invention.

FIG. 2 is a diagram showing the relationship between the elapsed time and the gas concentration in the container of the apparatus for producing gas-dissolved water according to the present invention.

FIG. 3 is a configuration diagram showing another example of the embodiment of the present invention.

FIG. 4 is a diagram showing an example of a conventional apparatus for producing dissolved gas.

FIG. 5 is a diagram showing a relationship between an elapsed time and a gas concentration in a container in a conventional gas-dissolved water producing apparatus.

[Explanation of symbols]

1 pump 2 containers 3 level meter 4 Control means 5,5a, 7 valve 6 pressure gauge 8 Oxygen concentration measuring means

Claims (5)

[Claims] 1. An apparatus for introducing a gas and a liquid into a closed atmosphere and dissolving the gas in the liquid, when the ratio of the gas different from the gas eluted from the liquid reaches a predetermined range, An apparatus for producing gas-dissolved water, which is configured to release the gas in the closed atmosphere. 2. A liquid supply means for supplying a liquid to a tank,
Gas supply means for supplying gas to the tank, liquid level control means for controlling the liquid level of the liquid supplied to the tank to a predetermined height, and pressure of the gas in the tank to a predetermined pressure Pressure control means, gas concentration detection means for detecting the concentration of gas in the tank, gas release means for releasing the gas in the tank, and liquid release means for releasing the liquid in the tank, A gas-dissolved water producing apparatus, which is configured to release the gas in the closed atmosphere when a ratio of a gas different from the gas eluted from the liquid reaches a predetermined range. 3. The means for detecting that the proportion of a gas different from the gas has reached a predetermined range is any one of gas concentration in the closed atmosphere, pressure, liquid level, drive time of the device, or any of these. 3. The gas-dissolved water production apparatus according to claim 1 or 2, which is two or more pieces of composite information. 4. When the gas concentration in the tank drops below a predetermined concentration, the gas releasing means is opened to replace the gas in the tank with the supply gas. Gas dissolved water production equipment. 5. The apparatus for producing gas-dissolved water according to claim 1, wherein the gas is oxygen gas and the different gas is nitrogen gas.