JP2013184130A - Gas dissolving tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas dissolving tank capable of separating undissolved gas, and easy in layout when installing it.SOLUTION: In a gas dissolving tank 1, a first partition wall 7 and a second partition wall 8 are provided inside the gas dissolving tank; the inside of the gas dissolving tank is sectioned into a gas/liquid mixing tank 10, an intermediate tank 11, and a gas/liquid separation tank 12 in this order from the flow-in side of a fluid 4 to the flow-out side of a gas-dissolved liquid 3, by the first partition wall and second partition wall; the gas/liquid mixing tank is communicated with the intermediate tank; the intermediate tank is communicated with the gas/liquid separation tank; and the sectional area of a part positioned downstream in the intermediate tank is set larger than the sectional area of a part positioned upstream that part.

Description

  The present invention relates to a gas dissolution tank for dissolving a gas in a liquid.

  In the gas dissolution tank, a gas such as air is dissolved in a liquid such as water in a pressurized state to generate a liquid in which the gas is dissolved. During the production of this liquid, the undissolved gas is separated so that the gas that cannot be completely dissolved does not flow out of the dissolution tank as large bubbles, and the separated gas can be reused for the production of the liquid, It is discharged to the outside.

  For example, the following Patent Document 1 includes a primary tank that generates a gas-liquid solution and a secondary tank that separates excess gas in the primary tank, and a primary tank and a secondary tank on the lower side. There is described a gas-liquid dissolution tank in which a side tank is communicated and provided with a bubble passage portion through which bubbles formed in the primary side tank pass. In the gas-liquid dissolution tank, a discharge port for discharging the gas-liquid solution is provided on the lower side of the secondary tank, and the discharge port is formed below the passage portion.

  In the gas-liquid dissolution tank, while the gas-liquid dissolution liquid generated in the primary side tank moves to the secondary side tank, it increases the time for the non-fine bubbles to rise naturally in the secondary side tank and separate the bubbles. And the outflow of undissolved gas to the outside can be suppressed.

Japanese Patent Laid-Open No. 2005-95878

  Thus, the gas-liquid dissolution tank described in Patent Document 1 can separate undissolved gas and suppress the outflow to the outside when generating a liquid in which gas is dissolved. However, on the other hand, in order to separate the bubbles by using the rising time of the bubbles, the discharge port is formed below the bubble passage portion, and the discharge portion that is the peripheral portion of the discharge port is connected to the gas-liquid dissolution tank. Projects downward from the bottom. For this reason, in the gas-liquid dissolution tank, the dimension in the height direction is longer by the amount corresponding to the discharge part, and for example, a problem is pointed out that consideration must be given to the layout when installing in a bathroom or the like.

  The present invention has been made in view of the circumstances as described above, and it is an object of the present invention to provide a gas dissolution tank that can separate undissolved gas and that is easy in layout at the time of installation. .

 In order to solve the above-described problems, a gas dissolution tank of the present invention is a gas dissolution tank that dissolves gas in a liquid and generates a liquid in which the gas is dissolved. A second partition wall is provided, and by these first partition wall and second partition wall, the inside of the gas dissolution tank extends from the fluid inflow side to the liquid outflow side of the dissolved gas, the gas-liquid mixing tank, the intermediate tank, The gas-liquid separation tank is divided in order, the gas-liquid mixing tank and the intermediate tank communicate with each other, the intermediate tank and the gas-liquid separation tank communicate with each other, and the cross-sectional area of the portion located downstream of the intermediate tank is Is also larger than the cross-sectional area of the portion located on the upstream side.

  In this gas dissolution tank, the first partition wall extends from the upper wall portion to the bottom wall portion of the gas dissolution tank, and partitions the gas-liquid mixing tank and the intermediate tank. It is preferable that the first partition walls communicate with each other at the bottom of the dissolution tank, and the first partition wall is inclined obliquely toward the intermediate tank as it is lowered downward.

  In this gas dissolution tank, it is preferable that the gas dissolution tank has a substantially inverted trapezoidal shape that is recessed downward from the upper wall portion toward the bottom wall portion.

  In this gas dissolution tank, it is preferable that the lower end portion of the first partition wall is curved toward the intermediate tank.

  In this gas dissolution tank, the second partition wall extends from the bottom wall portion of the dissolution tank toward the upper wall portion to partition the intermediate tank and the gas-liquid separation tank. It is preferable that the upper part of the tank communicates with each other, and the second partition wall is inclined obliquely toward the gas-liquid separation tank as it goes up.

  According to the gas dissolution tank of the present invention, undissolved gas can be separated, and the layout at the time of installation becomes easy.

It is sectional drawing which showed schematically 1st Embodiment of the gas dissolution tank of this invention. It is sectional drawing which showed schematically 2nd Embodiment of the gas dissolution tank of this invention. It is sectional drawing which showed schematically 3rd Embodiment of the gas dissolution tank of this invention. It is sectional drawing which showed schematically 4th Embodiment of the gas dissolution tank of this invention.

  FIG. 1 is a cross-sectional view schematically showing a first embodiment of a gas dissolution tank of the present invention.

  A gas dissolution tank 1 shown in FIG. 1 has a substantially rectangular parallelepiped shape, and a gas such as water alone or a liquid such as air serving as a solute is formed on the bottom wall portion 2 as a solvent of the liquid 3 in which the gas is dissolved. The fluid inflow part 5 into which the fluid 4 which is the gas-liquid mixed fluid flows is formed. The bottom wall 2 is formed with a liquid outflow part 6 for taking out the liquid 3 in which the gas is dissolved out of the gas dissolution tank 1. The liquid outflow part 6 is connected to the fluid inflow part 5 in the bottom wall 2. They are spaced apart. The fluid inflow portion 5 can be connected to the other end of an inflow pipe having one end connected to the discharge side of a pump that pumps the fluid 4. The liquid outflow part 6 can be connected to the other end of an outflow pipe such as a bathtub whose one end is connected to a supply destination of the liquid 3 in which gas is dissolved.

  In the gas dissolution tank 1, a first partition wall 7 and a second partition wall 8 are provided inside. The first partition wall 7 is disposed on the fluid inflow portion 5 side, and the second partition wall 8 is disposed on the liquid outflow portion 6 side. The first partition wall 7 extends from the upper wall portion 9 of the gas dissolution tank 1 toward the bottom wall portion 2, and the second partition wall 8 extends from the bottom wall portion 2 toward the upper wall portion 9. . By these first partition wall 7 and second partition wall 8, the inside of the gas dissolution tank 1 extends from the inflow side of the fluid 4 to the outflow side of the liquid 3 in which the gas is dissolved, and the gas-liquid mixing tank 10, the intermediate tank 11, The liquid separation tank 12 is partitioned in order.

  The 1st partition wall 7 inclines diagonally toward the intermediate tank 11 side as it falls below. The lower end 7 a of the first partition wall 7 does not reach the bottom wall portion 2 of the gas dissolution tank 1, so that the gas-liquid mixing tank 10 and the intermediate tank 11 communicate with each other at the bottom of the gas dissolution tank 1. Yes. The second partition wall 8 is disposed substantially perpendicular to the bottom wall portion 2 of the gas dissolution tank 1, and the upper end 8 a of the second partition wall 8 does not reach the upper wall portion 9 of the gas dissolution tank 1. For this reason, the intermediate tank 11 and the gas-liquid separation tank 12 communicate with each other in the upper part of the gas dissolution tank 1.

  Moreover, in the gas dissolution tank 1, the exhaust part 13 provided with the gas discharge valve which has a float etc. in the upper wall part 9 in the gas-liquid separation tank 12 is provided. The exhaust unit 13 communicates with the intermediate tank 11 and the gas-liquid separation tank 12.

  In such a gas dissolution tank 1, a gas that becomes a solute such as air in the liquid 3 in which the gas is dissolved is stored in advance inside. The fluid 4 pumped by the pump is jetted and flows into the gas-liquid mixing tank 10 through the fluid inflow portion 5 toward the inner surface of the upper wall portion 9 of the gas dissolution tank 1. At this time, the fluid 4 collides with the upper wall portion 9 and the first partition wall 7 of the gas dissolution tank 1, rebounds, and gradually accumulates in the gas-liquid mixing tank 10. Moreover, the fluid 4 which collides with the inner surface of the upper wall part 9 and rebounds collides with the liquid surface of the fluid stored in the gas-liquid mixing tank 10, and stirs the fluid.

  The gas stored in the gas dissolution tank 1 and the fluid 4 are mixed by stirring or the like at this time, and when the fluid 4 is a gas-liquid mixed fluid, the gas in the gas-liquid mixed fluid is also mixed. Then, dissolution of the gas into the liquid is promoted, and the liquid 3 in which the gas is dissolved is generated. This is because the gas mixed as bubbles in the fluid is subdivided by shearing by agitation, and the surface area in contact with the fluid increases, and the dissolved concentration of the gas near the liquid surface is reduced by homogenization by agitation. This is because the dissolution rate of the liquid into the liquid increases.

  The liquid 3 in which the gas thus generated is dissolved flows into the intermediate tank 11 using the gap between the lower end 7a of the first partition wall 7 and the bottom wall 2 of the gas dissolution tank 1 as a flow path, and gradually becomes intermediate. It accumulates in the tank 11. Since the liquid 3 in which the gas is dissolved flows into the intermediate tank 11 at the bottom of the gas dissolution tank 1, the mixing of large bubbles is suppressed in the liquid 3 in which the gas is dissolved. Moreover, in the intermediate tank 11, the first partition wall 7 is inclined obliquely toward the intermediate tank 11 as it goes down, so that the cross-sectional area of the portion located on the downstream side is upstream of this portion. The cross-sectional area of the portion located on the side is larger. For this reason, the flow rate of the liquid 3 in which the gas is dissolved becomes slower in the intermediate tank 11 from the downstream side to the upstream side, and bubbles due to the undissolved gas remaining without being completely dissolved in the liquid 3 in which the gas is dissolved are generated. As the intermediate tank 11 is raised, it gathers together and becomes a large bubble. Since the buoyancy acting on the large bubbles is large, the undissolved gas tends to escape upward from the liquid level in the intermediate tank 11. Large bubbles floating on the liquid surface burst, gas-liquid separation is performed, and undissolved gas stays in the upper part of the gas dissolution tank 1.

  In the intermediate tank 11, when the liquid level of the liquid 3 in which the gas is dissolved exceeds the upper end 8 a of the second partition wall 8, the liquid 3 in which the gas is dissolved flows into the gas-liquid separation tank 12. As described above, in the gas-liquid separation tank 12, the flow of the liquid 3 in which the gas is dissolved flows at the gas-liquid interface before the liquid 3 in which the gas is dissolved flows out of the gas dissolution tank 1 by the second partition wall 8. Since it is lifted to the vicinity of a certain liquid level, the rise by the buoyancy of large bubbles is promoted. Moreover, since the flow of the liquid 3 in which the gas is dissolved becomes a flow that passes over the upper end 8 a of the second partition wall 8, the flow passes through the liquid surface, and the liquid 3 in which the gas is dissolved passes over the second partition wall 8. In addition, gas-liquid separation is promoted.

  The liquid 3 in which the gas is dissolved after the gas-liquid separation is performed in this manner flows out from the bottom of the gas dissolution tank 1 to the outside of the gas dissolution tank 1 through the liquid outflow portion 6 and is taken out. The liquid 3 in which the taken-out gas is dissolved is sent out to a supply destination such as a bathtub as an excellent product in which mixing of large bubbles is suppressed.

  Thus, in the gas dissolution tank 1, the cross-sectional area of the portion located on the downstream side in the intermediate tank 11 is larger than the cross-sectional area of the portion located on the upstream side of this part. The flow rate of the liquid 3 in which the gas is dissolved can be reduced. For this reason, bubbles due to undissolved gas remaining in the liquid 3 in which the gas is dissolved without being completely dissolved can be gathered together, lifted by buoyancy as large bubbles, directed toward the liquid surface, and drawn upward from the liquid surface. Undissolved gas can be separated without causing the bottoms of the intermediate tank 11 and the gas-liquid separation tank 12 to protrude downward. The shape of the gas dissolution tank 1 is not particularly special, and no special consideration is required for installation in a bathroom or the like. The gas dissolution tank 1 has an easy layout when installed. Moreover, due to the oblique inclination of the first partition wall 7 toward the intermediate tank 11, the cross-sectional area of the portion located on the downstream side of the intermediate tank 11 is larger than the cross-sectional area of the portion located on the upstream side of this portion. Can be easily realized.

  In addition, the gas staying in the upper part of the intermediate tank 11 and the gas-liquid separation tank 12 can be exhausted from the exhaust part 13 to the outside of the gas dissolution tank 1 by removing the bubbles. The gas exhausted from the exhaust unit 13 can be reused to generate the liquid 3 in which the gas is dissolved.

  FIG. 2 is a cross-sectional view schematically showing a second embodiment of the gas dissolution tank of the present invention. In FIG. 2, parts corresponding to those of the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted below.

  The gas dissolution tank 21 shown in FIG. 2 is different in shape from the gas dissolution tank 1 shown in FIG. That is, the gas dissolution tank 21 shown in FIG. 2 has a substantially inverted trapezoidal cross-sectional shape that dents downward from the upper wall portion 9 toward the bottom wall portion 2. With such a shape of the gas dissolution tank 21, the flow rate of the liquid 3 in which the gas is dissolved flowing from the gas-liquid mixing tank 10 toward the intermediate tank 11 can be slowed, and remains in the liquid 3 in which the gas is dissolved. Bubbles due to undissolved gas are likely to associate in the intermediate tank 11. Moreover, since it has a substantially inverted trapezoidal cross section, a space can be formed in the vicinity of the bottom of the gas dissolution tank 21 and the layout at the time of installation becomes easier.

  FIG. 3 is a cross-sectional view schematically showing a third embodiment of the gas dissolution tank of the present invention. In FIG. 3, parts corresponding to those of the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted below.

  The gas dissolution tank 31 shown in FIG. 3 is different from the gas dissolution tank 1 shown in FIG. 1 in the shape of the lower end portion 71a of the first partition wall 71. That is, in the gas dissolution tank 31 shown in FIG. 3, the lower end portion 71 a of the first partition wall 71 is curved toward the intermediate tank 11. By disposing the curved portion 71b, it is difficult for air bubbles to accumulate in the portion 14 on the gas-liquid mixing tank 10 side at the lower end 71a of the first partition wall 71, and air bubbles due to undissolved gas can easily flow into the intermediate tank 11. it can. For this reason, in the gas dissolution tank 31, separation of undissolved gas in the intermediate tank 11 can be promoted.

  FIG. 4 is a cross-sectional view schematically showing a fourth embodiment of the gas dissolution tank of the present invention. In FIG. 4, parts corresponding to those of the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted below.

  The gas dissolution tank 41 shown in FIG. 4 is different from the gas dissolution tank 1 shown in FIG. That is, in the gas dissolution tank 41 shown in FIG. 4, the second partition wall 81 is inclined obliquely toward the gas-liquid separation tank 12 side as it rises upward. With the second partition wall 81 inclined obliquely toward the gas-liquid separation tank 12 side as it goes upward, the gas dissolution tank 41 has a cross-sectional area of a portion located on the downstream side in the intermediate tank 11. Further, the cross-sectional area of the portion located on the upstream side can be made larger. For this reason, bubbles due to the undissolved gas remaining in the liquid 3 in which the gas is dissolved are likely to associate in the intermediate tank 11, and the separation of the undissolved gas in the intermediate tank 11 is promoted.

  Note that reference numeral 81 a in FIG. 4 indicates the tip of the second partition wall 81.

  In addition, this invention is not limited by the above embodiment. The first partition wall and the second partition wall can be shaped not only to be inclined but also to bend the upper end portion of the second partition wall toward the gas-liquid separation tank. As long as the cross-sectional area of the portion located on the downstream side in the intermediate tank can be larger than the cross-sectional area of the portion located on the upstream side of this portion, the shape of the first partition wall and the second partition wall, etc. Various things can be adopted.

1, 21, 31, 41 Gas dissolution tank 2 Bottom wall portion 3 Gas dissolved liquid 4 Fluid 7, 71 First partition wall 71a Lower end portion 8, 81 Second partition wall 9 Upper wall portion 10 Gas-liquid mixing tank 11 Intermediate Tank 12 Gas-liquid separation tank

Claims (5)

  In a gas dissolution tank that dissolves gas in a liquid and generates a liquid in which the gas is dissolved, a first partition wall and a second partition wall are provided inside the gas dissolution tank, and the first partition wall and the second partition wall are provided. By the partition wall, the inside of the gas dissolution tank is partitioned in order of a gas-liquid mixing tank, an intermediate tank, and a gas-liquid separation tank from the fluid inflow side to the liquid outflow side where the gas is dissolved. The intermediate tank communicates with each other, the intermediate tank and the gas-liquid separation tank communicate with each other, and the cross-sectional area of the portion located on the downstream side of the intermediate tank is greater than the cross-sectional area of the portion located on the upstream side of this portion. A gas dissolution tank characterized in that it is also larger.   The first partition wall extends from an upper wall portion of the gas dissolution tank toward a bottom wall portion, and partitions the gas-liquid mixing tank and the intermediate tank. The gas-liquid mixing tank and the intermediate tank are the gas 2. The gas dissolution tank according to claim 1, wherein the gas partition tanks communicate with each other at a bottom portion of the dissolution tank, and the first partition wall is inclined obliquely toward the intermediate tank as it is lowered downward.   3. The gas dissolution tank according to claim 1, wherein the gas dissolution tank has a substantially inverted trapezoidal shape that is recessed downward from the upper wall portion toward the bottom wall portion. tank.   The gas dissolution tank according to any one of claims 1 to 3, wherein a lower end portion of the first partition wall is curved toward the intermediate tank.   The second partition wall extends from the bottom wall portion of the dissolution tank toward the upper wall portion to partition the intermediate tank and the gas-liquid separation tank, and the intermediate tank and the gas-liquid separation tank are The upper part of a gas dissolution tank is mutually connected, The said 2nd partition wall is inclined diagonally toward the said gas-liquid separation tank side as it goes up, The one side characterized by the above-mentioned. The gas dissolution tank described in 1.

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