JP2007313464A - Gas dissolving apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas dissolving apparatus in which an area of an interface of liquid and gas stored in a roughly cylindrical body is increased and flow out of liquid with large bubbles mixed therein from the cylindrical body is prevented by deepening the depth of the stored liquid. <P>SOLUTION: This gas dissolving apparatus 1 stores gas and liquid in the cylindrical body 2, and dissolves gas into liquid by jetting the gas-liquid mixed fluid in which gas and liquid are mixed in the cylindrical body 2. The cylindrical body 2 is disposed with its central axis a tilted state in relation to the horizontal direction b, the interface 40 of the gas and liquid stored in the cylindrical body 2 is located at the intermediate part of a roughly cylindrical side wall part 21 of the cylindrical body 2, and an upper side above the interface 40 in the cylindrical body 2 and a lower side are used as a gas storing part 41 and a liquid storing part 42, respectively. A jetting port 31 is provided at the same level as the interface 40, or at a slightly lower level in the cylindrical body 2, for jetting the gas-liquid mixed fluid into the gas storing part 41 in the cylindrical body 2, and a flow out port 32 is provided near a lower end part of the cylindrical body 2 for running out the liquid in the cylindrical body 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a gas-liquid dissolution apparatus, and more particularly to a bathtub apparatus that generates fine bubbles, and a structure of a gas-liquid dissolution tank used for oxygen supplementation in aquaculture and water purification of ponds and swamps (sludge floating). It is.

  2. Description of the Related Art Conventionally, there is known a gas dissolution apparatus that includes a gas dissolution tank and that dissolves gas in a liquid by jetting and stirring a gas-liquid mixed fluid in which gas and liquid are mixed in the gas dissolution tank (for example, Such a gas dissolution tank takes up installation space, and thus a small gas dissolution apparatus has been devised.

  This has a substantially cylindrical cylindrical body in the middle of the flow path, and stores gas and liquid in the cylindrical body, and a gas-liquid mixed fluid in which the gas and liquid are mixed in the cylindrical body. By jetting and stirring, the gas can be dissolved in the liquid, and a large tank such as the above-described gas dissolution tank is not required, and space saving can be achieved.

By the way, in the gas dissolving apparatus provided with such a cylindrical body, when the cylindrical body is arranged so that its longitudinal direction is horizontal, an interface between the gas and the liquid is formed over the entire area in the longitudinal direction. Although the area of the interface is increased, the depth of the stored liquid is as shallow as the radius of the cylindrical body, and the liquid flows out in the state where there are many large bubbles in the liquid. When arranged so that the longitudinal direction is vertical, the depth of the stored liquid becomes deep, but the interface between the gas and the liquid is only about the cross-sectional area of the cylindrical body, and the efficiency of mixing and stirring is low. There was a problem.
JP 2004-290803 A

  The present invention has been made in view of the above points, and the object of the present invention is to increase the area of the interface between the liquid and the gas stored inside the substantially cylindrical cylindrical body and An object of the present invention is to provide a gas dissolving device that does not flow out of a cylindrical body in a state in which large bubbles are mixed by increasing the depth of the liquid to be produced.

  In order to solve the above-mentioned problem, the invention according to claim 1 includes a substantially cylindrical tubular body 2 whose both ends are closed, stores gas and liquid in the tubular body 2, and A gas-dissolving device 1 for dissolving a gas in a liquid by injecting and stirring a gas-liquid mixed fluid in which a gas and a liquid are mixed in a cylindrical body 2, and the cylindrical body 2 has a central axis A in the horizontal direction. The interface 40 in the cylindrical body 2 is positioned so as to be inclined with respect to the gas and the liquid 40 stored in the middle portion of the substantially cylindrical side wall 21 of the cylindrical body 2. The part above 40 is a gas storage part 41 and the part below the interface 40 is a liquid storage part 42, at the same level as the interface 40 of the side wall part 21 of the cylindrical body 2 or slightly below the interface 40. The injection port 31 for injecting the gas-liquid mixed fluid to the gas storage part 42 in the cylindrical body 2 is provided, and the cylinder It is characterized in that comprising a lower end outlet 32 to the vicinity of the outflow of the liquid of the cylindrical body 2 in the liquid storage part 42 of the body 2 is provided.

  By adopting such a configuration, the area of the interface between the liquid and gas stored inside the cylindrical body is increased, and the depth of the stored liquid is increased so that large bubbles are mixed. Outflow from the cylindrical body can be prevented.

  In the invention according to claim 2, in the invention according to claim 1, the injection port 31 is provided at the bottom of the lower end of the cross-section perpendicular to the longitudinal direction of the substantially cylindrical side wall portion 21 of the cylindrical body 2. It is characterized by comprising.

  By adopting such a configuration, the gas mixture is stirred by collision with the inner wall surface of the side wall portion 21 of the gas-liquid mixed fluid, collision at the interface 40, and stirring of the stored liquid by the jet flow at the time of jetting. Dissolution in the liquid is promoted.

  Moreover, in the invention which concerns on Claim 3, in the invention which concerns on Claim 2, the connection edge part of the inflow pipe 51 for conveying the gas-liquid mixed fluid connected to the injection nozzle 31 to the cylindrical body 2 is provided. It is made to incline toward the upstream side A of the gas storage part 41, It is characterized by the above-mentioned.

  By setting it as such a structure, a gas-liquid mixed fluid will collide over the wide range of the inner surface of the gas storage part 41, and melt | dissolution of gas will be accelerated | stimulated further.

  Moreover, in the invention which concerns on Claim 4, in the invention which concerns on Claim 1, the position which shifted | deviated right and left from the lower end bottom part in the cross section perpendicular | vertical to the longitudinal direction of the substantially cylindrical side wall part 21 of the cylindrical body 2. This is characterized in that an injection port 31 is provided.

  With such a configuration, the gas-liquid mixed fluid ejected from the ejection port 31 becomes a swirl flow that swirls along the inner wall surface on the left and right sides of the cylindrical body 2, and is stored in the liquid storage unit 42. It collides vigorously at the liquid interface 40 and vigorously mixes and stirs, thereby further promoting the dissolution of the gas.

  The invention according to claim 5 includes the substantially cylindrical tubular body 2 whose both ends are closed, stores gas and liquid in the tubular body 2, and stores in the tubular body 2. A gas dissolving device 1 for dissolving a gas in a liquid by injecting and stirring a gas-liquid mixed fluid in which a gas and a liquid are mixed, and the cylindrical body 2 is inclined with respect to the horizontal direction B. The gas / liquid interface 40 stored inside is located in the middle part of the substantially cylindrical side wall part 21 of the cylindrical body 2, and the part above the interface 40 in the cylindrical body 2. The gas storage part 41 and the part below the interface 40 are the liquid storage part 42, and the injection port 31 is provided at the upper end in the cross section perpendicular to the longitudinal direction of the substantially cylindrical side wall part 21 of the cylindrical body 2. An outlet 32 for allowing the liquid in the cylindrical body 2 to flow out in the vicinity of the lower end of the liquid storage section 42 of the cylindrical body 2. Is characterized in that made provided.

  With such a configuration, the gas-liquid mixed fluid ejected from the ejection port 31 vigorously collides with the interface 40 below the ejection port 31 and vigorously mixes and stirs, thereby further promoting gas dissolution. The

  In the present invention, the area of the interface between the liquid and gas stored in the cylindrical body having a substantially cylindrical shape is increased, and the depth of the stored liquid is increased to mix large bubbles. Can be prevented from flowing out of the cylindrical body in a state where the gas is dissolved, and a gas dissolving device that has high stirring efficiency and does not flow out large bubbles can be configured by using a cylindrical body having a simple configuration of a substantially cylindrical shape. it can.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3. The gas dissolving apparatus of the present invention is used, for example, in a microbubble generator that generates microbubbles in bath water, and an example of a bathtub apparatus provided with a microbubble generator will be described below.

  The whole structure of the bathtub apparatus which provided the fine bubble generator in FIG. 2 is shown. The suction port 62 and the discharge port 63 are provided on the inner surface of the bathtub 61, and the air suction port 64 is provided on the flange portion of the bathtub 11. The suction port 62 is connected to the suction side of the pump 66 through a connection pipe 65, and the discharge side of the pump 66 is connected to the injection port 31 on the suction side of the gas dissolving apparatus 1 through an inflow pipe 51. The pump 66 may be a centrifugal pump or the like, but is not particularly limited. The outlet 32 on the discharge side of the gas dissolving device 1 is connected to one end of a venturi 70 serving as a pressure release portion via an outflow pipe 52, and the other end of the venturi 70 is installed on the side surface of the bathtub 61 via a connection pipe 71. The discharge port 63 is connected. When hot water in which the gas is dissolved is discharged from the discharge port 63 into the bath water of the bathtub 61, the dissolved gas is precipitated in the bath water and fine bubbles are generated. In the figure, 67 is a connecting pipe serving as an air flow path connected between the midway of the inflow pipe 51 and the check valve 68, and 69 is air connected between the air suction port 64 and the check valve 68. It is a connecting pipe that becomes a flow path.

  The gas dissolving apparatus 1 is mainly composed of a cylindrical body 2 composed of a side wall portion 21 having a straight cylindrical shape with a circular cross section and end wall portions 22 that close end portions on both sides of the side wall portion 21. The cylindrical body 2 is arranged in such a posture that the central axis i (the dashed line in FIG. 1) of the side wall portion 21 having a longitudinal direction, that is, a substantially cylindrical shape, is inclined by 10 to 45 ° with respect to the horizontal direction (arrow in FIG. 1). . The inclined cylindrical body 2 has an upper end serving as the upstream A end and a lower end serving as the downstream B end, and the gas-liquid mixed fluid is tubular into the upstream A. An injection port 31 for injecting into the body 2 is formed, and an outflow port 32 through which liquid flows out from the cylindrical body 2 is formed on the downstream side B.

  In the cylindrical body 2, for example, a gas such as air serving as a solute and a liquid such as water serving as a solvent are stored, and approximately in the vicinity of the center of the substantially cylindrical side wall portion 21 in the vertical direction. The interface 40 between the gas and the liquid is located, and the portion on the upstream side A above the interface 40 becomes the gas storage portion 41 in which the gas is stored, and the portion on the downstream side B below the interface 40 stores the liquid. It becomes the liquid storage part 42 to be performed. The injection port 31 is a liquid located slightly below the interface 40, at the inner wall surface of the gas reservoir 41 (the inner wall surface of the side wall 21 or the end wall 22 on the upstream side A from the interface 40), at the position of the interface 40. The storage wall 42 is formed on the inner wall surface (the inner wall surface of the side wall portion 21 on the downstream side B from the interface 40), and the outlet 32 is the inner wall surface near the end of the liquid storage portion 42 (the side wall on the downstream side B from the interface 40. The inner wall surface of the portion 21 or the end wall portion 22 is formed. In the present embodiment, the injection port 31 is a bottom surface near the upper end of the liquid storage part 42 slightly below the interface 40, that is, an inner surface of the side wall part 21 near the end of the upstream side A of the liquid storage part 42 in FIG. As shown in the cross-sectional view perpendicular to the longitudinal direction of the cylindrical body 2b in FIG. The end of the inflow pipe 51 is connected to the injection port 31. In this embodiment, the end of the inflow pipe 51 is formed at the injection port 31 as shown in the figure. It is connected substantially perpendicularly to the inner wall surface of the side wall 21.

  In the present embodiment, the outflow port 32 is formed on the bottom surface that faces upward near the end on the downstream side B of the liquid reservoir 42, and the end of the outflow pipe 52 is connected to the outflow port 32.

  The side wall 21 of the cylindrical body 2 is formed with an air vent 33 provided with a valve (not shown), and the position of the air vent 33 is stored in the gas reservoir 41 with the gas and liquid stored therein. It becomes the level of the interface 40 of the liquid stored in the part 42.

  The operation of the gas dissolving apparatus 1 will be described.

  In the cylindrical body 2, the liquid is stored in the liquid storage section 42 and the gas is stored in the gas storage section 41, and the same liquid stored in the cylindrical body 2 from the injection port 31. And the gas-liquid mixed fluid in which the gas is mixed is ejected. Since the ejection port 31 is formed on the bottom surface near the upper end of the liquid storage part 42 slightly below the interface 40 as described above, the gas-liquid mixed fluid ejected from the ejection port 31 is stored in the liquid storage part 42. The liquid is injected without being greatly reduced in momentum, collides with the inner wall surface on the upper side of the side wall portion 21 facing the injection port 31, rebounds on the inner wall surface, and enters the liquid storage portion 42 at the interface 40. It collides with the stored liquid and is stirred. In addition, the liquid stored in the liquid storage unit 42 is mixed with the gas-liquid mixture injected into the cylindrical body 2 from the injection port 31 in addition to the gas-liquid mixed fluid colliding with the interface 40 and being stirred as described above. Stirred by fluid.

  As described above, the gas stored in the cylindrical body 2 and the like by the collision of the gas-liquid mixed fluid with the inner wall surface of the side wall portion 21 or the collision at the interface 40, the stirring of the liquid when jetted, and the like. The liquid, the gas in the gas-liquid mixed fluid, and the liquid are mixed, and dissolution of the gas into the liquid is promoted. That is, the bubbles (gas) mixed with the liquid are subdivided by shearing by mixing and stirring, and the total surface area in contact with the liquid is increased. In addition, the dissolved concentration of the gas near the interface with the liquid gas is increased. Since it is reduced by homogenization by mixing and stirring, and the dissolution rate of the gas in the liquid increases, dissolution of the gas in the liquid is promoted.

  The liquid in which the dissolution of the gas has progressed is stored in the liquid storage part 42 of the cylindrical body, but many undissolved bubbles are mixed in the stored liquid, and such bubbles are present as they move upward. In the vicinity of the lower end of the liquid reservoir 42, there are not many bubbles, and there are almost no large bubbles. Then, the dissolution of the gas proceeds, and the liquid at the lower end of the liquid storage part 42 in which there are almost no large bubbles is caused to flow out of the cylindrical body 2 from the outlet 32.

  In the present invention, since the cylindrical body 2 of the gas dissolving device 1 is arranged in such a posture that the central axis i of the side wall portion 21 is inclined with respect to the horizontal direction B, the area of the interface 40 between the gas and the liquid is increased. In addition, the mixing and stirring efficiency can be improved, and the depth of the liquid stored in the liquid storage section 42 can be increased to prevent bubbles from flowing out of the cylindrical body 2. That is, when the cylindrical body 2 is arranged so that the longitudinal direction thereof is horizontal, the interface 40 between the gas and the liquid is formed over the entire area in the longitudinal direction and the area of the interface 40 is increased, but the liquid storage Since the depth of the liquid stored in the portion 42 is about the radius of the cylindrical body 2, the liquid flows out in a state where a large number of large bubbles exist in the liquid. In the case where the longitudinal direction is arranged to be vertical, the depth of the liquid stored in the liquid storage portion 42 becomes as deep as about half of the longitudinal direction of the cylindrical body 2, but the interface 40 between the gas and the liquid is Since it is formed only about the cross-sectional area of the cylindrical body 2, the efficiency of mixing and stirring is low, which is not preferable. However, by tilting the cylindrical body 2 as described above, it is possible to compensate for the disadvantages while maintaining the advantages of both. It can be done.

  As a result, it is possible to improve the efficiency of mixing and stirring described above and prevent the outflow of large bubbles simply by inclining the cylindrical body 2 having a substantially cylindrical shape, and the configuration is simple and the manufacture is easy. Therefore, the manufacturing cost is not increased, and the apparatus is not complicated or enlarged, so that the space can be saved.

  At this time, the end of the inflow pipe 51 connected to the injection port 31 is shifted from the direction toward the central axis A of the cylindrical body 2 from the injection port 31 in the cross section perpendicular to the longitudinal direction of the cylindrical body 2. The gas-liquid mixed fluid ejected from the ejection port 31 collides with the inner wall surface on one of the left and right sides of the cylindrical body 2 to form a swirling flow, and is stored in the liquid storage unit 42. The liquid interface 40 is vigorously mixed and stirred by vigorously colliding with the liquid interface 40, thereby further promoting the dissolution of the gas.

  Next, although other embodiment is described based on FIG. 4, since it is the same as that of embodiment mentioned above in most part, since it is the same, description is abbreviate | omitted and a different part is demonstrated.

  In the present embodiment, the end portion of the inflow pipe 51 connected to the injection port 31 is inclined to the upstream side A from the direction substantially perpendicular to the inner wall surface of the side wall portion 21 where the injection port 31 is formed. Connected to face in the direction. The position of the injection port 31 in the longitudinal direction is the same as in the above embodiment.

  The gas-liquid mixed fluid ejected from the ejection port 31 collides with the inner wall surface facing the ejection port 31, bounces off the inner wall surface, and collides at the liquid interface 40 stored in the liquid storage unit 42. However, until it merges, it becomes a state of floating in the cylindrical body 2 as a small droplet, and the surface area becomes large, and the gas is rapidly dissolved during this time. In the case of the present embodiment, since the gas-liquid mixed fluid is injected toward the upstream side A of the gas storage unit 41, the gas-liquid mixed fluid collides over a wide range of the inner surface of the gas storage unit 41 as compared with the above embodiment. As a result, dissolution of the gas is further promoted.

  Further, in this case, the interface 40 is positioned in the vicinity of the substantially center in the vertical direction of the substantially cylindrical side wall portion 21 of the cylindrical body 2, and a large gas storage portion 41 is provided at a portion upstream of the interface 40 of the side wall portion 21. Therefore, more gas is dissolved in the gas reservoir 41.

  Further, as another similar embodiment, as shown in FIG. 5, the injection port 31 is offset (shifted) to the left and right from the lower end of the left and right central portion in the cross section perpendicular to the longitudinal direction of the cylindrical body 2. The gas-liquid mixed fluid may be jetted upward. Also in this way, the gas-liquid mixed fluid ejected from the ejection port 31 becomes a swirl flow that swirls along the inner wall surface on the left and right sides of the cylindrical body 2, and the liquid stored in the liquid storage unit 42 It collides vigorously at the interface 40 and vigorously mixes and stirs, thereby further promoting the dissolution of the gas.

  Next, still another embodiment will be described with reference to FIG. 6. However, the description of the same part as that of the embodiment shown in FIG. 1 will be omitted, and a different part will be described.

  In the present embodiment, the injection port 31 is formed on the inner surface of the upper end portion of the left and right central portion that faces downward in the cross section perpendicular to the longitudinal direction of the cylindrical body 2, and the gas-liquid mixed fluid is directed downward. It comes to be injected.

  The gas-liquid mixed fluid ejected from the ejection port 31 violently collides with the interface 40 with the liquid below the ejection port 31 and is vigorously mixed and stirred, thereby further promoting the dissolution of the gas.

  Further, as in still another embodiment shown in FIG. 7, the side wall portion 21 of the cylindrical body 2 is not a straight cylindrical shape having a circular cross section, but may be a shape in which two straight cylindrical members are connected. In this example, the central axis A of the side wall portion 21 is bent in the middle of the liquid storage portion 42, and the distance to the outflow port 32 becomes long and large bubbles are difficult to flow out.

It is a perspective view of one embodiment of the gas dissolution apparatus of the present invention. It is a whole block diagram of the bathtub apparatus provided with the gas dissolving apparatus same as the above. Sectional drawing of a gas dissolving apparatus same as the above is shown, (a) is a longitudinal cross-sectional view along a longitudinal direction, (b) is AA sectional drawing of (a). It is a longitudinal cross-sectional view along the longitudinal direction of the gas dissolving apparatus of other embodiment. Furthermore, sectional drawing of the gas dissolving apparatus of other embodiment is shown, (a) is a longitudinal cross-sectional view along a longitudinal direction, (b) is AA sectional drawing of (a). Furthermore, sectional drawing of the gas dissolving apparatus of other embodiment is shown, (a) is a longitudinal cross-sectional view along a longitudinal direction, (b) is AA sectional drawing of (a). It is sectional drawing of other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gas dissolving apparatus 2 Cylindrical body 21 Side wall part 31 Injection port 32 Outflow port 40 Interface 41 Gas storage part A Center axis B Horizontal direction

Claims (5)

  Provided with a substantially cylindrical cylindrical body closed at both ends, storing gas and liquid in the cylindrical body, and injecting and stirring a gas-liquid mixed fluid in which the gas and liquid are mixed into the cylindrical body A gas dissolving device for dissolving a gas in a liquid, wherein the cylindrical body is disposed such that its central axis is inclined with respect to the horizontal direction, and is disposed in an intermediate portion of the substantially cylindrical side wall portion of the cylindrical body. The gas-liquid interface stored in the cylindrical body is positioned, and the part above the interface in the cylindrical body is the gas storage part and the part below the interface is the liquid storage part. An injection port for injecting the gas-liquid mixed fluid into the gas storage part in the cylindrical body is provided at the same level or a level slightly below the interface, and the liquid in the cylindrical body is placed near the lower end of the liquid storage part of the cylindrical body. A gas dissolving apparatus comprising an outlet for discharging.   2. The gas dissolving apparatus according to claim 1, wherein an injection port is provided at the bottom of the lower end in a cross section perpendicular to the longitudinal direction of the substantially cylindrical side wall of the cylindrical body.   3. The gas according to claim 2, wherein the connection end of the inflow pipe for conveying the gas-liquid mixed fluid connected to the injection port to the cylindrical body is inclined toward the upstream side of the gas storage section. Melting device.   2. The gas dissolving apparatus according to claim 1, wherein an injection port is provided at a position shifted to the left and right from the bottom of the lower end in a cross section perpendicular to the longitudinal direction of the substantially cylindrical side wall of the cylindrical body. Provided with a substantially cylindrical cylindrical body closed at both ends, storing gas and liquid in the cylindrical body, and injecting and stirring a gas-liquid mixed fluid in which the gas and liquid are mixed into the cylindrical body A gas dissolving device for dissolving a gas in a liquid, wherein the cylindrical body is disposed such that its central axis is inclined with respect to the horizontal direction, and is disposed in an intermediate portion of the substantially cylindrical side wall portion of the cylindrical body. The interface between the gas and liquid stored in the cylinder is positioned, the portion above the interface inside the cylindrical body is used as the gas storage portion, and the portion below the interface is used as the liquid storage portion, so that the cylindrical body is substantially cylindrical. A gas characterized in that an injection port is provided at the upper end in a cross section perpendicular to the longitudinal direction of the side wall, and an outlet for allowing the liquid in the cylindrical body to flow out is provided in the vicinity of the lower end of the liquid storage portion of the cylindrical body. Melting device.

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