JP2017064590A - Gas dissolution water generation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive gas dissolution water generation device capable of continuously stably generating water of dissolving desired gas in the high concentration.SOLUTION: A gas dissolution water generation device of the present invention comprises a pressurization pump 5 for generating pressurized water of mixing nitrogen gas supplied from a gas supply part 1 to treatment object water, a liquid foam generator 7 formed deeper than its opening diameter by opening the uppermost part, a sealed vessel 8 for installing this liquid foam generator on the inside, a nozzle 6a arranged in an upper part of the liquid foam generator 7 and injecting the pressurized water into the liquid foam generator 7 while rolling in the nitrogen gas inside of this sealed vessel 8, a foam generator 10 for supplying primary treatment water W1 discharged from the sealed vessel 8 via a liquid introduction pipe 9, an opening vessel 11 for providing an atmospheric pressure communicating opening part 11a in an upper part and installing the foam generator 10 on the inside and a gas supply pipe 2b installed so that the nitrogen gas can be supplied from the gas supply part 1 to an upper space in this opening vessel 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an apparatus for replacing an existing gas dissolved in a liquid with a desired gas, and in particular, a gas-dissolved water generating apparatus capable of generating water in which a desired gas is dissolved at a high concentration at low cost. About.

As a method for producing a gas solution by dissolving a desired gas in a liquid, a gas dissolving membrane module using a membrane such as a hollow fiber membrane is used to dissolve hydrogen gas or nitrogen gas, a semiconductor, a precision instrument, etc. A method of generating washing water used in the production of the above, a desired gas and liquid are mixed with a static mixer using a circulation pump, the desired gas is refined and brought into high-density contact, and the treatment liquid is further mixed. A method for increasing the concentration of a desired gas by circulating the gas is known.
In addition, nitrogen gas or helium gas is blown into a liquid containing oxygen gas, and nitrogen gas or helium gas is brought into contact with the liquid to diffuse dissolved oxygen gas from the liquid to the gas phase. Methods for removing it are also known.

As a technique related to such a method, for example, in Patent Document 1, nitrogen gas is converted into pure water or ultrapure using a gas dissolving membrane module under the name of “nitrogen gas dissolved water manufacturing method and nitrogen gas dissolved water manufacturing system”. An invention relating to a method for dissolving in water and a system used therefor is disclosed.
When gas-dissolved water is produced by dissolving gas in pure water or the like using a gas-dissolving membrane module, a part of the pure water or the like supplied to the liquid phase chamber becomes water vapor and permeates the gas-permeable membrane. As a result of dew condensation in the phase chamber and condensate, which covers the surface of the gas permeable membrane on the gas phase chamber side, the effective area contributing to gas permeation of the gas permeable membrane is reduced. Therefore, the “nitrogen gas dissolved water production method” disclosed in Patent Document 1 introduces condensed water generated in the gas phase chamber into the condensed water discharge portion, and condensate water in a state where the connection with the gas phase chamber is cut off. By supplying nitrogen gas to the discharge part, condensed water introduced into the part is discharged.
According to such a method, since condensed water is efficiently discharged, it is possible to prevent the performance of the gas permeable membrane module from being deteriorated.

Further, in Patent Document 2, a specific gas used in a wet cleaning process such as an electronic material is dissolved and cleaned under the name of “method for manufacturing specific gas dissolved water, manufacturing apparatus and method for circulating specific gas dissolved water”. An invention relating to a method for producing a so-called specific gas-dissolving functional washing water with enhanced effects and an apparatus used therefor are disclosed.
The “method for producing specific gas-dissolved water” disclosed in Patent Document 2 introduces used or unused specific gas-dissolved water into a gas permeable membrane module and decompresses the air chamber using a decompression mechanism. Degassing and separating the exhaust gas consisting of degassed treated water and specific gas and other gas, and after recovering the specific gas from the exhaust gas, dissolve all the collected specific gas in the degassed treated water To obtain a specific gas-dissolved water.
In this way, after the other gas dissolved in the specific gas-dissolved water is degassed together with the specific gas and simultaneously removed, the specific gas is dissolved again according to the method of dissolving the specific gas in the cleaning water. Can be increased.

Furthermore, Patent Document 3 includes a method for producing deaerated water used as cleaning water or the like when producing semiconductors, precision equipment, etc., under the name of “deaerated water producing apparatus and deaerated water producing method”. An invention relating to an apparatus used therefor is disclosed.
The “deaerated water production apparatus” disclosed in Patent Document 3 has a structure including a hollow fiber membrane module, a water flow sensor, a dry vacuum pump, a drain part, a drain valve, and an on-off valve.
With such a structure, even when the inside of the hollow fiber membrane module is stopped, water is not stored in the interior so that the deaeration action is inhibited. Therefore, when the faucet is opened, the hollow fiber membrane module is removed. There is no problem that unintentional water flows out of the faucet. Therefore, it is possible to reliably produce deaerated water.

JP 2012-139656 A JP 2008-6332 A JP 2008-698 A

However, in the invention disclosed in the above-described prior art, in order to dissolve a desired gas in a liquid, a degassing process must be performed in advance using a membrane module or a vacuum pump, or the liquid must be circulated. There was a problem of not becoming. Moreover, since materials, such as a membrane module, deteriorate with the passage of time, there is a problem that a stable treatment liquid cannot be obtained. And in order to prevent the fall of processing capacity, since the said raw material needs to be replaced | exchanged regularly, there existed a subject that it was not economical.
On the other hand, when a vacuum pump is used, since the processing liquid is taken out from the negative pressure region formed in the part of the apparatus to the atmospheric pressure, the processing takes time, and the amount of the processing liquid is larger than that generated. In other words, there was a problem of requiring a lot of energy.

  The present invention has been made in response to such a conventional situation, and an inexpensive gas-dissolved water generating apparatus capable of continuously and stably generating water in which a desired gas is dissolved at a high concentration. The purpose is to provide.

  In order to achieve the above object, a gas-dissolved water generator according to a first aspect of the present invention mixes a gas supplied from a gas supply unit with water to be treated supplied via a suction pipe, and has a pressure higher than atmospheric pressure. A pressure pump that generates pressurized water, a liquid bubble generator that is open at the top and formed deeper than the diameter of the opening, and a sealed container that has pressure resistance and in which the liquid bubble generator is installed. A nozzle that is disposed above the liquid bubble generator and injects pressurized water into the liquid bubble generator while entraining the gas in the closed container; a liquid supply pipe that supplies pressurized water from a pressure pump to the nozzle; and a sealed container The discharged primary treated water is supplied via the liquid introduction pipe, and an atmospheric pressure communication opening is provided at the upper part to generate secondary treated water from the primary treated water, and an upper space in the open container. Supply gas from the gas supply A gas supply pipe that can be installed, and a flow rate adjusting valve that is installed in the liquid introduction pipe, and a discharge port for secondary treated water is provided at the bottom of the open container. is there.

  In the gas-dissolved water generating apparatus having such a structure, the water to be treated in which the desired gas supplied from the gas supply unit is mixed is pressurized by the pressure pump until the pressure is higher than the atmospheric pressure, and the nozzle Are injected toward the center of the liquid bubble generator to generate a large amount of bubbles at the bottom of the liquid bubble generator, and these bubbles merge with each other while rising in the liquid bubble generator to form liquid bubbles in the upper region of the container. After changing, it overflows. At this time, since the water to be treated comes into contact with the high-pressure gas in a state where the gas-liquid contact area is increased, primary treated water in which a desired gas is dissolved in the water to be treated is generated.

  This primary treated water is stored in the lower part of the sealed container, but in the gas-dissolved water generating apparatus having the above structure, the flow rate adjusting valve is operated to adjust the flow rate of the primary treated water discharged from the sealed container. , The inside of the sealed container is maintained at a desired pressure state. In this case, since the pressure of the gas in the large amount of liquid bubbles existing near the reduced diameter in the liquid bubble generator is always maintained in a desired state, the gas dissolved in the thin film water of the liquid bubbles has a concentration proportional to the pressure. As a result, unnecessary gas is released from the thin film water.

Furthermore, since the open container is provided with an atmospheric pressure communication opening, the pressure of the gas supplied from the gas supply unit into the open container is equal to the atmospheric pressure. That is, since the primary treated water generated in the closed container and supplied into the open container is covered with a gas having a lower pressure than in the closed container, the solubility of the gas is lowered, and the dissolved gas It has the effect that a part is dissipated.
Further, the gas supplied from the gas supply unit to the upper space in the open container covers the surface of the primary treated water, thereby preventing other unnecessary gases from being dissolved in the primary treated water.

  Moreover, 2nd invention is the gas dissolved water production | generation apparatus which concerns on 1st invention, The container which has the hollow part reduced in diameter to the up-down direction of the rotational symmetry axis | shaft formed in the rotation object substantially, and this container A foam generating container that is fixed to the outer peripheral wall, and a liquid introducing hole that is opened in a tangential direction is provided in the peripheral wall portion of the container body, and the reduced diameter portion on the upper side of the hollow portion, A gas-liquid jet hole opened in the direction of the rotational symmetry axis is provided in accordance with the position of the negative pressure gas axis formed by the swirling flow of the liquid flowing into the vessel body, and the rotational symmetry axis is parallel to the vertical direction. When the container is installed so as to form a pipe, the pipe is installed with a predetermined gap with respect to the gas-liquid jet hole so that the axis of rotation coincides with the center of the axis. It is installed in the foam generator so that it can be inserted, and a pair of openings communicates with the upper and lower centers. Each is provided with a treated water discharge port at the bottom, the pipe is installed in the foam generation container so that one end protrudes from the opening, and the foam generator is installed in the open container and liquid The introduction pipe is connected to the liquid introduction hole.

  In the gas-dissolved water generating apparatus having such a structure, when the primary treated water is supplied from the sealed container through the liquid introduction pipe to the liquid introduction hole of the apparatus body, a swirling flow flowing toward the gas-liquid ejection hole is generated in the apparatus body. Due to the action of the centripetal force that is generated, a negative pressure gas axis is formed near the center of the body. At this time, the negative pressure of the gas shaft is transmitted to the upper end of the pipe installed so that the center of the cylindrical shaft coincides with the center of the gas shaft, and the gas supplied from the gas supply unit to the upper space in the open container It is sucked into the gas shaft through the pipe. That is, in the gas-dissolved water generating device of the present invention, the gas supplied from the gas supply unit is continuously self-primed by the gas shaft inside the container simply by supplying the primary treated water from the liquid introduction hole of the foam generator. Has the effect of being

Further, the gas continuously sucked into the gas shaft is the moment when the swirling flow is injected from the gas-liquid jet hole by the swirling primary treated water discharged from the gas-liquid jet hole and the gas sucked into the gas shaft. In addition, a large amount of liquid bubbles is generated in the bubble generating container.
In this case, the primary treated water in the swirling flow forms thin film water on the surface of the liquid foam, and the gas-liquid contact area increases, so that the gas in the liquid foam is absorbed into the thin film water and can be dissolved in the thin film water. This has the effect that no gas is diffused into and out of the liquid bubble. Furthermore, the gas diffused in the liquid bubbles is diffused from the atmospheric pressure communication opening of the open container to the atmosphere when the liquid bubbles overflow and burst from the opening of the foam generation container and the treated water discharge port. Has an effect.
As described above, in the gas-dissolved water generating apparatus of the present invention, in addition to the action of the first invention, the foam generator changes the primary treated water supplied from the sealed container into the open container to the liquid foam thin film water. It has the action.

3rd invention is the gas dissolved water production | generation apparatus which concerns on 1st invention or 2nd invention, One end is connected to a gas supply part, and the other end is connected to the pore provided in the suction pipe A self-priming tube is provided.
In the gas-dissolved water generating apparatus having such a structure, in addition to the operation of the first invention or the second invention, when the pressurizing pump is operated, the water to be treated is sucked from the suction pipe and is negatively introduced into the gas self-priming pipe. Since the pressure is applied, the self-sucked gas from the gas supply unit is supplied to the suction side of the pressurizing pump together with the water to be treated.

  As described above, according to the gas-dissolved water generating apparatus according to the first invention, when gas is dissolved in the water to be treated, unlike the case of using a membrane module, a vacuum pump, or the like, treatment associated with deterioration. Since maintenance costs such as a decrease in capacity and replacement are not generated, water in which a desired gas is dissolved at a high concentration can be continuously generated stably and at a low cost.

  In the gas-dissolved water generating apparatus according to the second aspect of the present invention, the primary treated water that has become a gas-foam thin film water in the open container and has an increased gas-liquid contact area comes into contact with the high-pressure gas. Since it is well diffused, the effect of the first invention that the water in which the desired gas is dissolved at a high concentration can be continuously produced stably is further exhibited.

  According to the gas dissolved water generating apparatus according to the third invention, in addition to the effects of the first invention or the second invention, the gas sent from the gas supply unit and the water to be treated are easily mixed with a simple structure. Therefore, the manufacturing cost of the device is reduced.

It is a schematic diagram which shows the structure of the gas dissolved water production | generation apparatus which concerns on embodiment of this invention. It is the schematic diagram showing a mode that the pressurized water injected from the nozzle was supplied to the center bottom part of a liquid bubble generator. It is sectional drawing which showed the structure of the foam generator. It is sectional drawing of the modification of the foam generator shown in FIG.

  The gas dissolved water production | generation apparatus of this invention is demonstrated concretely, referring FIGS. 1-4. In this embodiment, it is assumed that nitrogen gas is dissolved in seawater. However, the gas to be dissolved is not limited to nitrogen gas, and may be, for example, oxygen gas, hydrogen gas, ozone gas, helium gas, or the like. . The liquid that dissolves the gas is not limited to seawater. That is, the action / effect of the present invention described below is also exhibited when a gas other than nitrogen gas is dissolved in seawater or other liquid.

  As shown in FIG. 1, in the gas dissolved water generating apparatus of the present invention, a gas supply comprising a PSA (Pressure Swing Adsorption) apparatus that extracts nitrogen from the air by utilizing the difference in adsorption characteristics of the adsorbent to the gas. The gas self-priming pipe 2a and one end of the gas supply pipe 2b are connected to the part 1. The other end of the gas self-priming pipe 2 is connected to a pore (not shown) provided in the suction pipe 3, and one end of the suction pipe 3 is connected to the water tank 4 in which the water to be treated W1 is stored. At the same time, the other end is connected to a pressurizing pump 5 that generates pressurized water showing a pressure higher than the atmospheric pressure.

The discharge side of the pressurizing pump 5 is connected to the other end of the liquid supply pipe 6 provided with a nozzle 6 a having a round hole injection port at one end, and below the one end of the liquid supply pipe 6, A liquid bubble generator 7 that is open at the top and formed deeper than the opening diameter is installed to receive pressurized water pressurized by the pressure pump 5 and sprayed from the nozzle 6a. The nozzle 6a is attached to the end of the liquid supply pipe 6 bent at a right angle with the injection port facing downward so that the flow of pressurized water just before the injection is disturbed inside the liquid supply pipe 6. ing. As a result, the pressurized water ejected from the nozzle 6a is supplied to the liquid bubble generator 7 while entraining a large amount of gas in the surrounding space.
On the other hand, the liquid bubble generator 7 is stored in a sealed container 8 having pressure resistance so that a liquid containing liquid bubbles overflowing from the upper part can be stored as the primary treated water W2, with the lower surface supported by the support bar 8b. Note that one end of a liquid introduction pipe 9 whose other end is connected to a liquid introduction hole 15 b (see FIG. 3) of the foam generator 10 is connected to the discharge port 8 a of the sealed container 8.

  The foam generator 10 is accommodated in an open container 11 provided with an opening 11a communicating with the atmospheric pressure so that the liquid discharged from the foam generator 10 can be stored as the secondary treated water W3. In addition, the open vessel 11 is connected to a discharge port 11b for supplying the secondary treated water W3 to the water tank 12, and nitrogen for filling the space above the stored secondary treated water W3. The other end of the gas supply pipe 2b is connected to the upper part so that the gas can be supplied from the gas supply unit 1. Further, valves 14a and 14b for adjusting the flow rate of nitrogen gas are respectively installed in the gas self-priming pipe 2a and the gas supply pipe 2b, and the flow rate of the secondary treated water W2 to the foam generator 10 is set in the liquid introduction pipe 9. A valve 14c for adjusting the pressure is installed. That is, the airtight container 8 has a structure in which the flow rate of the secondary treated water W2 can be adjusted by the valve 14c so as not to lower the pressure of the gas phase occupying the secondary treated water W2 below a predetermined value. The foam generator 10 has a frame-equipped pipe 17 installed therein.

As shown in FIG. 3, the foam generator 10 is fixed to the outer wall of the container body 15 having a hollow portion 15 a that is formed on a substantially rotating object and has a diameter reduced in the vertical direction of the rotational symmetry axis. The foam generation container 16 is made.
A liquid introduction hole 15b opened in a tangential direction is provided in the peripheral wall portion of the vessel body 15, and the swirling flow of the liquid flowing into the vessel body 15 (see FIG. 3) is formed in the reduced diameter portion on the upper side of the hollow portion 15a. An upward gas-liquid ejection hole 15c opened in the direction of the rotationally symmetric axis is provided in accordance with the position of the negative pressure gas axis formed by the arrow).

  A pipe 17 with a frame is attached to the container body 15 by a fixed screw (not shown) with a predetermined gap provided to the upward gas-liquid jet hole 15c. In addition, the foam generation container 16 is provided so that the openings 16a and 16b communicate with the upper and lower central parts, and the treated water discharge ports 16c are provided at a plurality of positions in the lower part. The pipe 17 with the frame is inserted into the foam generation container 16 so that the upper end protrudes from the opening 16a.

The operation method of the gas dissolved water production | generation apparatus provided with such a structure is demonstrated.
First, when the pressurizing pump 5 is operated, the water W1 to be treated is sucked from the suction pipe 3, and a negative pressure is applied to the gas self-priming pipe 2a. Therefore, nitrogen gas is self-absorbed from the gas supply unit 1 through the valve 14a, and the water to be treated in a state where the nitrogen gas is mixed is supplied to the suction side of the pressurization pump 5. In this case, since the structure in which nitrogen gas is mixed with the water to be treated is simple, the manufacturing cost of the apparatus is reduced.

The water to be treated mixed with nitrogen gas is pressurized by the pressure pump 5 until it reaches a pressure higher than the atmospheric pressure, and is sprayed from the nozzle 6 a toward the center of the liquid bubble generator 7. In the liquid bubble generator 7, a large amount of bubbles are generated at the bottom of the container by the pressurized water sprayed from the nozzle 6a. The bubbles merge with each other while rising inside the liquid bubble generator 7 and change into liquid bubbles in the upper region of the container and then overflow (see FIG. 2).
In this way, the pressurized water ejected from the nozzle 6 a becomes liquid foam thin film water at least once and overflows and is discharged from the liquid foam generator 7. And the liquid bubble overflowed and discharged | emitted from the liquid bubble generator 7 becomes the primary treated water W2 which nitrogen gas melt | dissolved in high concentration, and is stored by the lower part in the airtight container 8. FIG.
At this time, the valve 14c has an effect of maintaining the inside of the sealed container 8 in a desired pressure state by adjusting the flow rate of the primary treated water W2 discharged from the discharge port 8a of the sealed container 8.
In addition, since the pressure of the gas in a large amount of liquid bubbles existing in the vicinity of the reduced diameter in the liquid bubble generator 7 is always maintained in a desired state in this way, the gas dissolved in the thin film water of the liquid bubbles is The concentration is proportional to the pressure, and unnecessary gas is released from the thin film water.

When the primary treated water W2 is supplied from the sealed container 8 through the liquid introduction pipe 9 to the liquid introduction hole 15b provided in the container body 15 of the foam generator 10, as shown by the arrow in FIG. A swirling flow that flows toward the inside of the container body 15 is generated inside, and a negative pressure gas axis is formed near the center in the container body 15 by the action of the centripetal force.
At this time, as shown in FIG. 3, since the pipe 17 with the frame is installed so that the center of the cylindrical axis coincides with the center of the gas axis, the negative pressure of the gas axis is applied to the upper end in the pipe 17 with the frame. The nitrogen gas supplied from the gas supply unit 1 to the upper space inside the open container 11 (see FIG. 1) through the gas supply pipe 2b is sucked into the gas shaft through the pipe 17 with the frame. That is, the foam generator 10 has an effect that nitrogen gas is continuously self-sucked by the gas shaft in the vessel body 15 only by supplying the primary treated water W2 from the liquid introduction hole 15b. Therefore, as described above, the upper end of the pipe 17 with the frame is opened to the upper space (gas phase) in the open container 11 (see FIG. 1) in which nitrogen gas exists, or a container that forms such a gas phase. It is desirable to install in the state which protruded upwards rather than the bubble generator 10 so that it may be connected to.

Further, a large amount of nitrogen gas continuously sucked into the gas shaft is discharged from the upward gas-liquid jet hole 15c because the distance to the water surface is short. As a result, bubbles are generated at the moment when the swirling flow is ejected from the upward gas-liquid ejection hole 15c by the swirling primary treated water W2 discharged from the upward gas-liquid ejection hole 15c and the nitrogen gas sucked into the gas shaft. A large amount of liquid bubbles is generated in the container 16.
In this case, since the primary treated water W2 of the swirl flow forms thin film water on the surface of the liquid bubble and the gas-liquid contact area increases, the thin film water absorbs nitrogen gas in the liquid bubble and cannot be dissolved in the thin film water. Gas is released into and out of the liquid bubble. And the gas diffused in the liquid bubbles flows into the atmosphere from the atmospheric pressure communication opening 11a of the open container 11 when the liquid bubbles overflow and burst from the opening 16a of the foam generation container 16 and the treated water discharge port 16c. And diffused.

  In addition, when gas other than nitrogen gas is contacting with the primary treated water W2, there exists a possibility that the gas may melt | dissolve in the primary treated water W2. Therefore, in the gas dissolved water generating apparatus having the above structure, nitrogen gas is supplied from the gas supply unit 1 to the upper space in the open container 11. That is, the nitrogen gas supplied from the gas supply unit 1 to the upper space in the open container 11 covers the surface of the primary treated water W2 and prevents other unnecessary gases from being dissolved in the primary treated water W2. have.

  On the other hand, water in which nitrogen gas is dissolved at a high concentration is discharged as secondary treated water W3 from the treated water discharge port 16c provided in the lower part of the foam generating container 16. The secondary treated water W <b> 3 generated in this way is discharged from the discharge port 11 b of the open container 11 and stored in the water tank 12 through the supply pipe 13.

Next, the operation and effect of the gas dissolved water generator of the present invention will be described.
When the mixed gas is in contact with the liquid, it dissolves in the liquid until the respective gases are saturated in proportion to each partial pressure of the gas constituting the mixed gas.
As already described, in the gas-dissolved water generating device of the present invention, pressurized water in which nitrogen gas is mixed with the water to be treated W1 is supplied into the sealed container 8 by the pressure pump 5, and the pressure of nitrogen gas in the pressurized water is adjusted. While maintaining a high state, the liquid foam generator 7 changes the liquid to thin film water. In this case, since the to-be-treated water W1 comes into contact with the high-pressure nitrogen gas in a state where the gas-liquid contact area is increased, primary treated water W2 in which the nitrogen gas is dissolved at a high concentration is generated in the to-be-treated water W1.

  The primary treated water W1 generated in the sealed container 8 is supplied to the foam generator 10 installed in the open container 11 and then discharged from the foam generator 10 as the secondary treated water W2. At this time, since the open container 11 is provided with the atmospheric pressure communication opening 11a, the pressure of the nitrogen gas supplied from the gas supply unit 1 into the open container 11 is equal to the atmospheric pressure. That is, the primary treated water W <b> 2 that has become thin film water on the surface of the liquid foam in the foam generation container 16 is covered with nitrogen gas having a lower pressure than the nitrogen gas in the sealed container 8. As a result, the solubility of the gas decreases, and a part of the dissolved gas is diffused.

  For example, the ratio of the gas A and the gas B dissolved in the water to be treated W1 at the water temperature T is X (ppm) and Y (ppm) under atmospheric pressure, and saturation is obtained when only the gas A is dissolved. It is assumed that the value is 2X (ppm). The ratio of the gas A and the gas B dissolved in the primary treated water W2 in the sealed container 8 is 4X (ppm) and Y (ppm), respectively, and dissolved in the secondary treated water W3 in the open container 11. Assuming that the ratio of the gas B is 0.25Y (ppm), the dissolved amount of the gas A is increased by the amount by which the dissolved amount of the gas B is decreased. Therefore, the gas dissolved in the secondary treated water W3 The ratio of A is a value larger than X (ppm) within a range not exceeding 2X (ppm).

  In addition, by preparing a plurality of gas-dissolved water generating apparatuses of the present invention and connecting them in series, the ratio of the gas A can be further increased. That is, the water tank 12 of the first gas-dissolved water generating device is used as the water tank 4 of the second gas-dissolved water generating device, and two secondary treated waters W3 generated by the first gas-dissolved water generating device are used. It is used as the water to be treated W1 of the eye gas-dissolved water generator. If the ratio of the gas B dissolved in the secondary treated water W3 at the water temperature T is halved by the first gas-dissolved water generating device, it is generated by the second gas-dissolved water generating device. The ratio of the gas B dissolved in the secondary treated water W3 to be further reduced to 1/2. And by performing such a process continuously using a plurality of first gas-dissolved water generators, the gas A dissolved in the secondary treated water W3 is reduced as the amount of gas B dissolved decreases. The ratio will approach the saturation value.

  As described above, in the gas dissolved water generating apparatus of the present invention, the unnecessary gas dissolved in the water to be treated is replaced with the desired gas, so that the desired gas has a high concentration up to a value close to saturation. It has the effect that dissolved water is produced. And in the gas dissolved water production | generation apparatus of this invention, when dissolving gas in to-be-processed water, since a membrane module, a vacuum pump, etc. are not used, the maintenance expenses, such as a reduction | decrease of processing capacity accompanying a deterioration and replacement | exchange, generate | occur | produce There is nothing. Therefore, it is possible to continuously and stably produce water in which a desired gas is dissolved at a high concentration.

  In addition, although the primary treated water W2 is supplied with respect to the foam generator 10 installed in the open container 11 in a present Example, the foam generator 10 can also be abbreviate | omitted. Even in such a structure, after the primary treated water W2 in which the gas is dissolved at a high concentration is generated by bringing the gas having a pressure higher than the atmospheric pressure into contact with the water to be treated W1 in the sealed container 8, the gas is released. The above-described operation and the accompanying effect of dissipating unnecessary gas at a high rate from the primary treated water W2 by lowering the pressure of the gas brought into contact with the primary treated water W2 in the vessel 11 to the atmospheric pressure are similarly exhibited. However, as shown in the present embodiment, when the foam generator 10 is used, the dissolved gas is more efficiently dissipated from the primary treated water W2 in the open container 11, so that it can be continuously maintained in a more stable state. Thus, the secondary treated water W3 can be generated.

Moreover, the foam generator 18 shown in FIG. 4 can also be used instead of the foam generator 10 shown in FIG. However, the bubble generator 18 has a rotationally symmetric axis in accordance with the position of the negative pressure gas axis formed by the swirling flow of liquid that has flowed into the vessel body 15 (see the arrow in FIG. 4). Upward and downward gas-liquid jet holes 15c and 15d opened in the direction of are respectively provided. The pipes 17 and 17 with a frame are attached to the container body 15 with fixing screws (not shown) with a predetermined gap with respect to the gas-liquid ejection holes 15c and 15d, and the pipes 17 and 17 with the frame are opened. It has a structure in which the foam generating containers 16 and 16 are respectively installed so as to be inserted inside with the respective upper ends protruding from 16a and 16a.
In the gas-dissolved water generating apparatus having such a structure, the process of changing the primary treated water W2 supplied from the sealed container 8 into the thin film water of the liquid foam in the open container 11 is more efficient than when the foam generator 10 is used. Done. Therefore, the effect that water in which a desired gas is dissolved at a high concentration can be continuously generated stably is further exhibited.

  The inventions described in claims 1 to 3 include cooking oils such as soybean oil, corn oil and vegetable oil, alcoholic beverages such as sake and wine to which a large amount of antioxidants are added, dressing, juice and milk. In the case of liquid drinkable foods such as the above, it is applicable to the case where the expiration date is extended by removing oxygen gas components in the liquid and saturating with nitrogen gas instead. Further, it can be used to generate boiler water, water from which oxygen gas components used in chemical factories and the like are removed, and cleaning water from which oxygen gas components used in semiconductor factories and the like are removed.

  DESCRIPTION OF SYMBOLS 1 ... Gas supply part 2a ... Gas self-priming pipe 2b ... Gas supply pipe 3 ... Suction pipe 4 ... Water tank 5 ... Pressure pump 6 ... Liquid supply pipe 6a ... Nozzle 7 ... Liquid bubble generator 8 ... Sealed container 8a ... Discharge port 8b ... Support rod 9 ... Liquid introduction pipe 10 ... Foam generator 11 ... Open container 11a ... Atmospheric pressure communication opening 11b ... Discharge port 12 ... Water tank 13 ... Supply pipe 14a-14c ... Valve 15 ... Container 15a ... Hollow part 15b ... Liquid Introducing holes 15c, 15d ... Gas-liquid ejection holes 16 ... Foam generating containers 16a, 16b ... Opening 16c ... Treated water outlet 17 ... Pipe with frame 18 ... Foam generator W1 ... Water to be treated W2 ... Primary treated water W3 ... Second Next treated water

Claims (3)

A pressure pump that generates pressurized water that shows a pressure higher than atmospheric pressure by mixing the gas supplied from the gas supply unit to the water to be treated supplied via the suction pipe;
A liquid bubble generator that is open at the top and formed deeper than the opening diameter;
A sealed container having pressure resistance and in which the liquid foam generator is installed;
A nozzle that is disposed at the top of the liquid foam generator and injects the pressurized water into the liquid foam generator while entraining the gas in the sealed container;
A liquid supply pipe for supplying the pressurized water from the pressure pump to the nozzle;
An open container that is supplied with primary treated water discharged from the sealed container through a liquid introduction pipe and has an atmospheric pressure communication opening at the top to generate secondary treated water from the primary treated water;
A gas supply pipe installed so as to be able to supply the gas from the gas supply unit to the upper space in the open container;
A flow rate adjusting valve installed in the liquid introduction pipe,
A gas-dissolved water generating apparatus, wherein a discharge port for the secondary treated water is provided at a lower portion of the open container. A container having a hollow portion formed in a substantially rotating object and having a diameter reduced in the vertical direction of the rotational symmetry axis;
A foam generating container fixed to the outer peripheral wall of the container, and a foam generator comprising:
A liquid introduction hole opened in a tangential direction is provided in the peripheral wall portion of the vessel body,
A gas-liquid jet that opens in the direction of the rotationally symmetric axis in accordance with the position of the negative pressure gas axis formed by the swirling flow of the liquid that has flowed into the interior of the vessel body in the reduced diameter portion on the upper side of the hollow portion Holes are provided,
When the container is installed so that the rotationally symmetric axis is parallel to the vertical direction, a predetermined gap is provided with respect to the gas-liquid ejection hole so that the pipe is aligned with the rotationally symmetric axis. Installed,
The foam generation container is installed in the foam generator so that the pipe can be inserted therein, and provided with a pair of openings communicating with the upper and lower centers, respectively, and a treated water discharge port is provided in the lower part,
The pipe is installed in the foam generating container so as to protrude one end from the opening,
The gas-dissolved water generating apparatus according to claim 1, wherein the foam generator is installed in the open container and the liquid introduction pipe is connected to the liquid introduction hole. The gas dissolution according to claim 1 or 2, further comprising a gas self-priming pipe having one end connected to the gas supply unit and the other end connected to a pore provided in the suction pipe. Water generator.

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