JP2011105375A - Circulation tank and liquid pouring mixing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circulation tank having a structure to equalize frequencies of circulations of all liquids including the inside of the circulation tank when a liquid and a liquid or the like are mixed by a circulation method. <P>SOLUTION: In a circulation tank 10, a circulation liquid inlet port 21 provided at the upper part of a cylindrical tank 10, into which a circulation liquid 11 flows, and a circulation liquid 11 outlet port 22 provided at a lower part of the tank 10, from which the circulation liquid flows out are connected to a circulation piping 2 each and the inside of the circulation tank 10, in which the circulation liquid 11 is circulated by a pump 12 connected to the circulation piping 2, is partitioned with a partition plate 31 having two or more openings 32 formed at intervals which is supported by a support 30 provided in a standing state at the center of the tank. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a circulation tank that is provided in the middle of a circulation line of a liquid-liquid or liquid-gas mixed liquid, and in which the total amount of the liquid mixture can uniformly acquire the number of circulations, and a liquid injection mixing apparatus using the circulation tank.

  Circulation tanks are used in a wide range of fields, such as liquid cooling, superheating, liquid-liquid mixing, and gas dissolution in liquids, such as medicinal liquid production lines, medical products, and foodstuffs including beverages. It is provided in the middle of the line according to the capacity to be manufactured in the batch method.

  In Patent Document 1, in a detoxification device for treating harmful gas discharged from a semiconductor and liquid crystal production line or the like and equipped with an emergency cooling means, the circulating water in the circulation tank is sprayed into the furnace and sprayed. It is described that returned circulating water is returned to the circulation tank.

  In Patent Document 2, in the process of removing the organic film in the manufacturing process of the semiconductor device with a stripping solution, the stripping solution stored in the circulation tank 3 is supplied to the processing unit, and the stripping solution supplied to the processing unit is collected. And return to the circulation tank.

  Patent Document 3 discloses an absorption liquid sprayed from a spray nozzle in an absorption tower in a wet flue gas desulfurization apparatus that improves the oxidation performance by reducing the bubble diameter of oxidizing air and increasing the oxidation rate of sulfurous acid in the absorption liquid. A circulation tank that circulates is described.

  Patent Document 4 describes a biogas purification system in which a cleaning liquid for cleaning and removing a biological desulfurization product stored in a circulation tank is supplied to a biological desulfurization tower to spray water, and the cleaning liquid is returned.

  Patent Document 5 describes a steel plate cleaning facility that always keeps the cleaning liquid in the line tank clean by discharging both floating scum and sludge from the line tank and returning them to the circulation tank.

JP 2005-296732 A Special closed 2007-150148 gazette JP 2008-068161 A JP 2008-127407 A JP 2008-214716 A

  However, all the circulation tanks described in the above-mentioned patent documents are intended to ensure the capacity for cooling or heating the liquid, or simply for manufacturing, and therefore a special structure for the inside of the circulation tank is shown. Absent.

  Therefore, the present invention provides a circulation tank having a structure in which the number of circulations of all liquids including the inside of the circulation tank is made uniform when mixing liquids and liquids in a circulation system.

  In the circulating tank of the present invention, a circulating fluid inlet provided in the upper part of the cylindrical tank and a circulating fluid outlet provided in the lower part of the tank are connected to the circulation pipe. In the circulation tank in which the circulating fluid circulates by a pump connected to the circulation pipe, one or more partitions in which a plurality of openings are formed at intervals in a support column standing in the center of the tank. The plate is supported and the inside of the circulation tank is partitioned.

  The partition plate formed with a plurality of openings spaced from each other circulates without forming stagnation in the circulation tank, so that it is uniformly mixed.

  Further, in the liquid injection and mixing apparatus using the circulation tank of the present invention, the circulation tank and an injection liquid tank that contains an injection liquid that becomes a dispersoid to be injected into the liquid of the dispersion medium are arranged, and the circulation of the circulation tank An infusion solution dispersion nozzle for injecting the infusion solution into the liquid is connected to the pipe, and the infusion solution dispersion nozzle is connected to an infusion solution tank containing the infusion solution through an infusion solution introduction pipe having an infusion solution introduction amount adjustment valve. The injection liquid dispersion nozzle includes an injection liquid introduction channel into which the injection solution is introduced into the liquid injection dispersion nozzle and a plurality of liquid channels through which the liquid flows in and out, and the injection liquid introduction channel An outflow side liquid outflow hole surrounding the outflow side of the liquid flow path opens into the mixing chamber, and the mixing chamber flows out of the infusate injection hole into the liquid flowing out of the liquid outflow hole. An injection chamber into which the injected liquid is injected; Together provided continuously to the injection chamber, to stir the liquid and the injection solution, characterized in that it comprises a large diameter of the stirring chamber from the infusion chamber.

  By providing the circulation tank and the injection liquid dispersion nozzle, it is possible to uniformly mix and disperse the liquid and the injection liquid.

  In the present invention, when mixing liquids and liquids with a circulation system, the circulating liquid flows without forming stagnation in the tank by the partition plate provided with the opening, and the number of circulations in the circulation tank is made uniform. it can.

  In the liquid injection / mixing apparatus provided with the circulation tank of the present invention, the liquid and the injection liquid can be mixed uniformly. Moreover, when producing | generating a liquid and a liquid emulsion with this liquid injection | pouring mixing apparatus, the emulsion of a more uniform size can also be produced | generated by match | combining the frequency | count of circulation of the liquid in all the apparatuses.

It is sectional drawing of the circulation tank of this invention. (A) is an AA arrow view of FIG. 1, (b) is the BB arrow view, (c) is an arrow view of FIG. 2C-C. It is sectional drawing of another Example of the circulation tank of this invention. It is another Example of the partition plate of the circulation tank of this invention. (A) is a DD arrow view of FIG. 4, (b) is an EE arrow view of FIG. 4, (c) is CC arrow view of FIG. It is a figure which shows the example at the time of using the circulation tank of this invention for a liquid injection | pouring mixing apparatus. (A) is a cross-sectional view of an injection liquid dispersion nozzle that can be used in the liquid injection mixing apparatus of FIG. 6, (b) is a view showing an inflow surface, (c) is a view showing an outflow surface, and (d) is an outflow surface. It is an enlarged side view seen from the surface. (A) is a distribution graph of the average diameter of the emulsion produced | generated by the test example, (b) is a measurement graph of zeta potential. It is a figure which shows the example at the time of using the circulation tank of this invention for the liquid injection | pouring mixing apparatus which inject | pours a some liquid. (A) is a cross-sectional view of an injection liquid dispersion nozzle that can be used in the liquid injection mixing apparatus of FIG. 9, (b) is a view showing an inflow surface, (c) is a view showing an outflow surface, and (d) is an outflow surface. It is an enlarged side view seen from the surface.

  Embodiments of the present invention will be described with reference to the drawings.

  1 and 2, the cylindrical circulation tank 10 is provided with a circulation liquid inlet 21 through which the circulation liquid flows in at the upper part of the tank 10, and the circulation liquid in the tank is caused to flow out at the lower part of the tank 10. A circulating liquid outlet 22 is provided. The circulating fluid inlet 21 is formed so that the circulating fluid flows in a tangential direction so as to form a fluid flow that swirls in the circulation tank 10.

  The circulating fluid inlet 21 and the circulating fluid outlet 22 are respectively connected to the circulation pipe 2 (FIG. 3), and the circulating liquid 11 in the circulation tank 10 circulates through the circulation pipe 2 and the circulation tank 10.

  In the circulation tank 10, a plurality of partition plates 31 are supported at intervals in a vertical direction on a column 30 erected at the center of the tank 10. The support column 30 also serves as a support for the partition plate 31 and can avoid aggregation in turning.

  The partition plate 31 is formed with openings 32 through which the circulating fluid 11 passes, and two types of partition plates 31 having different openings 32 are alternately supported by the support columns 30. One partition plate 31 has openings 32 formed on the outer peripheral side at intervals along the outer periphery, and the other partition plate 31 has openings 32 formed at intervals around the center.

  The opening 32 of the partition plate 31 can be formed with an introduction fin 32a that guides the flow in the swirling direction above and below the opening 32 so that the circulating liquid 11 propagates a liquid flow swirling obliquely downward. In addition to a circle, it is possible to implement not only a circle but also a polygon including an ellipse and a triangle.

  By arranging the openings 32 on the outer peripheral side of the partition plate 31 and the openings 32 around the center alternately, the liquid flowing into the circulation tank 10 in the tangential direction from the circulating liquid inlet 21 is on the outer peripheral side of the partition plate 31. The liquid that is directed toward the outer periphery toward the opening 32 and passes through the opening on the outer periphery 32 is directed toward the center by the opening 32 around the center of the next partition plate 31, and the outer periphery through the opening 32 of the next partition plate 31. The liquid passing toward the outer peripheral side toward the opening 32 on the side and passing through the opening on the outer peripheral side 32 flows and circulates toward the circulating liquid outlet 22. Accordingly, in the circulation tank 10, the circulating liquid alternately passes through the outer peripheral side and the center side of the partition plate with a swirling flow, so that the number of circulations can be made uniform without the liquid in the circulation tank stagnating.

  In the circulation tank 10 shown in FIG. 3, the same components as those in the circulation tank 10 shown in FIG. The difference from the first embodiment is a structure in which the inside of the tank is partitioned by one partition plate 31. A partition plate 31 is supported at the center of a column 30 erected at the center of the tank 10. The partition plate 31 has an opening 32 through which the circulating liquid 11 passes.

  Similar to the first embodiment, the opening 32 of the partition plate 31 is formed so as to propagate the liquid flow in which the circulating liquid 11 turns obliquely downward. By the partition plate 31 having the opening 32, the liquid in the circulation tank can be circulated and made uniform without stagnating.

  In the circulation tank 10 shown in FIGS. 4 and 5, the same components as those in the circulation tank 10 shown in FIGS. The difference from the first embodiment is the structure of the partition plate.

  4 and 5, in order to prevent gas from accumulating at the lower part of the partition plate 31 in the circulation tank 10, the gas vent hole 33 is used to vent the gas in the direction indicated by the broken line arrow in FIG. 4 at the outer edge of the partition plate 31. Further, the partition plate 31 is inclined upward toward the outer peripheral side so that the gas is directed from the inside toward the outer periphery of the tank 10.

  Further, an inclined downward flow forming blade 34 that forms a downward flow by guiding the circulating fluid flowing in from the circulating fluid inlet 21 and turning downward may be provided in the upper part of the circulation tank. In FIG. 5, the downward flow forming blades 34 are provided in a cross shape, but the form is not limited as long as it is provided so as to form a downward flow. By forming the downward flow, for example, even when mixing a liquid such as water and oil that has a large difference in specific gravity and is difficult to mix, the oil rising on the water surface can be drawn downward.

  The liquid injection mixing apparatus using the circulation tank of the present invention will be described. This liquid injection and mixing apparatus injects and mixes B liquid into A liquid.

  As shown in FIG. 6, a circulation tank 10 in which the liquid A is stored at the start of operation and a mixed liquid generated thereafter is circulated, and an injection liquid tank 14 in which an injection liquid (B liquid) is stored are arranged. The circulation tank 10 is provided with a circulation pipe 2 for circulating the liquid in the tank.

  In the middle of the circulation pipe 2, a pump 12 for feeding the circulating liquid 11 and an injection liquid dispersion nozzle 1 for finely dispersing the injection liquid are connected. A pressure gauge 13 is provided on the outlet side of the pump 12. In FIG. 5, the injection liquid is injected by self-priming, but can be injected separately using an injection pump or the like.

  An injection liquid introduction pipe 6 for introducing an injection liquid (B liquid) into the injection liquid dispersion nozzle 1 is connected to the injection liquid tank 14. The infusion solution introduction pipe 6 is provided with an infusion solution introduction amount adjustment valve 7. The opening amount of the infusion solution introduction amount adjustment valve 7 is adjusted to adjust the amount of infusion solution to be injected, and at the end of the injection. Close the valve and stop the injection. In addition, a check valve 8 for preventing the backflow of the injected solution is attached.

  Moreover, when producing | generating the liquid mixture of an emulsion with a liquid injection | pouring mixing apparatus, you may provide the circulation piping 2 with the means to detect the production | generation state of an emulsion. For example, the transmittance of light is detected by a transmitted light measuring device, and the circulation is terminated when the transmittance is stabilized.

  In FIG. 7, a liquid flow path 3 through which the liquid sent through the circulation pipe 2 flows in and out is formed in the injection liquid dispersion nozzle 1 whose both ends are connected to the circulation pipe 2. Is formed with a liquid inflow hole 3 a, and a liquid outflow hole 3 b is opened to the mixing chamber 4 on the outflow side of the liquid flow path 3. In the present embodiment, the three liquid flow paths 3 are formed so as to be point-symmetrical at the end surfaces.

  The injection liquid dispersion nozzle 1 is provided with an injection liquid introduction flow path 5 for introducing the injection liquid mixed with the liquid by self-suction, and the injection liquid introduction flow path 5 is formed on the outer surface of the injection liquid dispersion nozzle 1 on the introduction side. The injection liquid introduction hole 5a is opened, and the injection liquid injection hole 5b is opened on the outflow side. The injection liquid injection hole 5b is disposed so as to be surrounded by the three liquid outflow holes 3b. With this arrangement, the injected liquid can be continuously injected into the liquid by self-priming.

  The mixing chamber 4 in which the liquid flowing out from the liquid outflow hole 3b of the liquid flow path 3 and the injection liquid injected from the liquid injection hole 5b of the injection liquid introduction flow path 5 are mixed is used as the liquid flowing out from the liquid outflow hole 3b. An injection chamber 4a into which the injection solution flowing out from the injection solution injection hole 5b is injected, and a stirring chamber 4b having a diameter larger than the injection chamber 4a are formed continuously to the injection chamber 4a.

  In the injection chamber 4a, the liquid discharged from the liquid outflow hole 3b is stably and continuously sucked from the injection liquid injection hole 5b by the self-priming action due to the orifice effect, and cavitation occurs on the discharge surface having the liquid injection hole 5b. As a result of the occurrence of a peeling zone accompanied by, the liquid mixture of the liquid A and the liquid B can be refined. The mixed solution exiting the injection chamber 4a is uniformly stirred by the turbulent flow generated in the stirring chamber 4b.

  The operation of the liquid injection and mixing apparatus of the present embodiment is as follows.

  When the pump 12 is operated, the liquid A stored in the circulation tank 10 flows into the circulation pipe 2, and at the same time, a negative pressure is generated in the vicinity of the injection liquid injection hole 5b of the injection chamber 4a of the injection liquid dispersion nozzle 1, and the injection is performed. The B liquid is automatically injected from the liquid tank 14 through the injection liquid introduction pipe 6 by a self-priming action. The injection amount is adjusted by the opening degree of the injection liquid introduction amount adjustment valve 7 attached to the injection liquid introduction pipe 6. The B liquid is injected into the A liquid in the injection chamber 4a, and the mixed liquid obtained by mixing the refined B liquid is discharged while being stirred in the stirring chamber 4b and sent to the circulation tank 10.

  In the circulation tank 10, the liquid that flows into the circulation tank 10 in the tangential direction from the circulation liquid inlet 21 flows toward the opening 32 on the outer peripheral side of the partition plate 31, passes through the opening 32, and the center of the next partition plate 31. It flows toward the center side by the surrounding opening 32, passes through the opening 32 toward the outer peripheral side toward the opening 32 of the next partition plate 31, and flows toward the circulating liquid outlet 22 through the opening 32. In the circulation tank 10, since the circulating liquid alternately passes through the outer peripheral side and the center side of the partition plate with a swirling flow, the number of circulations can be made uniform without the liquid in the circulation tank stagnating.

  The mixed liquid in the circulation tank 10 is sucked by the pump 12 from the lower part of the tank 10, mixed and refined and dispersed while injecting the injected liquid through the circulation pipe 2 with the injected liquid dispersion nozzle 1.

  When a predetermined amount of injection solution is injected, the injection solution introduction amount adjustment valve 7 is closed. After the injection is stopped, the circulation is repeated and the mixture tank is repeatedly refined and diffused in the circulation tank 10.

  By circulating a predetermined number of times, the injected liquid becomes nano-sized monodisperse, and since the droplet has a negative potential, an emulsion that does not cause droplet coalescence due to Ostwald ripening or the like is obtained.

<Test example>
Dispersion medium (liquid A): water, dispersoid (liquid B to be injected): orange oil * O / W emulsion

Step 1
The inside of the apparatus is filled with 0.55 L of water, and 0.3 volume% of orange oil is continuously injected into the injection liquid dispersion nozzle 1 in small amounts while the apparatus is circulated at a pressure of 0.35 MPa.

Step 2
When the injection of orange oil is completed, the injection liquid introduction amount adjustment valve 7 is closed and the operation is continued for 1000 passes (in the case of this test, about 5 hours and 40 minutes), and the circulation pipe 2 and the circulation tank 10 are circulated. Let me. The arrangement of the partition plate 31 and the opening 32 is as shown in FIGS.

Step 3
The generation of the uniform mixed liquid is completed with a stable state in which the transmitted light intensity of the emulsion liquid in the circulation pipe does not increase after about 30 passes of the circulating liquid.

  The test results are as shown in FIG. 8. The measurement was carried out using a Zetasizer Nano NZ manufactured by Sysmex Corporation, the average diameter was measured by a dynamic light scattering method, and the zeta potential was measured by an electrophoresis / laser Doppler method.

  From FIG. 8, it was confirmed that a liquid mixture having an average diameter of 36.36 nm and an average value of zeta potential of −40.4 mV was produced.

  The mixed liquid in this example was an emulsion, and it was also confirmed that it was not separated even in a stationary state at least 3 months after the production without adding a surfactant or an emulsifier.

  This example is an example of producing an emulsion in which a plurality of nano-sized dispersoids (liquid B, liquid C, liquid D, liquid E) are injected and dispersed in a dispersion medium (liquid A).

  In FIG. 9, A liquid is stored at the time of an operation start, and the circulation tank 10 which stores the emulsion manufactured after that, the injection liquid tanks 14B and 14C which store the B liquid, C liquid, D liquid, and E liquid to inject | pour, respectively. 14D and 14E are arranged. The circulation tank 10 is provided with a circulation pipe 2 for circulating the liquid in the tank.

  In the middle of the circulation pipe 2, a pump 12 for sending the circulating liquid and an injection liquid dispersion nozzle 1 for refining and dispersing the injection liquid are connected. A pressure gauge 13 is provided on the outlet side of the pump 12.

  Each of the injection liquid tanks 14B, 14C, 14D, and 14E has injection liquid introduction pipes 6B, 6C for introducing the B liquid, C liquid, D liquid, and E liquid, which are injection liquids, into the injection liquid dispersion nozzle 1. 6D and 6E are connected. Each infusion solution introduction pipe 6 is provided with an infusion solution adjustment amount valve 7 for stopping the injection and a check valve 8 for preventing the backflow of the infusion solution while adjusting the opening degree to adjust the amount of the injected solution to be injected. It is attached.

  As shown in FIG. 10, the basic structure of the injection liquid dispersion nozzle 1 of this embodiment is basically the same as that of the injection liquid dispersion nozzle 1 shown in FIG. Reference numerals are assigned and explanations thereof are omitted. However, in FIG. 7, the injection liquid introduction flow path 5 having one injection liquid is arranged, whereas in this embodiment, four injection liquid introduction flow paths 5 are provided and four types of injection liquids are simultaneously used. By mixing, the mixture is refined and dispersed so that an emulsion can be produced.

  In this embodiment, when the pump 12 is operated, the liquid A stored in the circulation tank 10 flows into the circulation pipe 2, and at the same time, a negative pressure is generated in the vicinity of the injection liquid injection hole 5 b of the stirring chamber 4 of the injection liquid dispersion nozzle 1. The B liquid is injected from the injection liquid tanks 14B, 14C, 14D, and 14E through the injection liquid introduction pipes 6B, 6C, 6D, and 6E. The injection amount is adjusted by the opening degree of the injection liquid introduction amount adjusting valve 7 attached to the injection liquid introduction pipes 6B, 6C, 6D, 6E. Liquid B, liquid C, liquid D, liquid E are injected into liquid A in the injection chamber 4a, and flown out while being stirred in the stirring chamber 4b and sent to the circulation tank 10. The circulating liquid sent to the circulation tank 10 is sucked by the pump 12 from the lower part of the tank 10, mixed and refined and dispersed while injecting the injection liquid with the injection liquid dispersion nozzle 1 through the circulation pipe 2. The

  When a predetermined amount of each injection solution is injected, the injection solution introduction amount adjustment valve 7 is closed. Even after the injection is stopped, the circulation is repeated to repeat mixing and refinement. By circulating a predetermined number, a mixed liquid in which particles of each nano-sized liquid are dispersed is obtained.

1: injection liquid dispersion nozzle 2: circulation pipe 3: liquid flow path 3a: liquid inflow hole 3b: liquid outflow hole 4: mixing chamber 4a: injection chamber 4b: stirring chamber 5: injection liquid introduction flow path 5a: injection liquid introduction Hole 5b: Injection liquid injection holes 6, 6B to E: Injection liquid introduction pipe 7: Injection liquid introduction amount adjusting valve 8: Check valve 10: Circulating tank 11: Circulating liquid 12: Pump 13: Pressure gauges 14, 14B to E : Injection liquid tank 21: Circulating fluid inlet 22: Circulating fluid outlet 23: Exhaust valve 30: Strut 31: Partition plate 32: Opening 32 a: Introducing fin 33: Gas vent 34: Downward flow forming blade

Claims (9)

A circulating fluid inlet provided in the upper part of the cylindrical tank into which the circulating fluid flows and a circulating fluid outlet provided in the lower part of the tank from which the circulating fluid flows out are connected to the circulation pipe and connected to the circulation pipe. In the circulation tank where the circulating fluid circulates by
A circulation tank characterized in that the circulation tank is partitioned by supporting one or more partition plates having a plurality of openings formed at intervals on a support column erected in the center of the tank. tank.   A partition plate in which an opening is formed on the outer peripheral side at intervals along the outer periphery and a partition plate in which the opening is formed at intervals around the support column are vertically arranged on a support column erected in the center of the tank. 2. The circulation tank according to claim 1, wherein the circulation tank is partitioned and supported alternately in a direction.   The circulating tank according to claim 1 or 2, wherein the circulating fluid inlet introduces the circulating fluid in a tangential direction to form a swirling flow.   The circulation tank according to any one of claims 1 to 3, wherein the opening of the partition plate is formed so that a swirling flow of the circulating liquid propagates.   The circulation tank according to any one of claims 1 to 4, wherein the partition plate is inclined upward from the support column side toward the outer peripheral side, and a gas vent hole is provided in the outer edge for venting air. . The circulation according to any one of claims 1 to 5, wherein a downward flow forming blade is provided for guiding the circulating fluid flowing into the upper part of the circulation tank downward to form a downward flow. tank. A circulation tank according to any one of claims 1 to 6 and an injection liquid tank that contains an injection liquid that is a dispersoid to be injected into the liquid of the dispersion medium are disposed,
An injection liquid dispersion nozzle for injecting an injection liquid into the liquid is connected to the circulation pipe of the circulation tank,
The injection liquid dispersion nozzle is connected to an injection liquid tank containing the injection liquid via an injection liquid introduction pipe provided with an injection liquid introduction amount adjusting valve,
The injection liquid dispersion nozzle includes an injection liquid introduction channel into which the injection liquid is introduced into the liquid injection dispersion nozzle and a plurality of liquid channels through which the liquid flows in and out, and the outflow of the injection liquid introduction channel. A liquid outflow hole on the outflow side of the liquid flow channel surrounding the injection liquid injection hole on the side opened to the mixing chamber, and the mixing chamber flowed out of the injection liquid injection hole into the liquid flowing out of the liquid outflow hole A liquid injection and mixing apparatus comprising: an injection chamber into which an injection liquid is injected; and a stirring chamber having a diameter larger than that of the injection chamber, which is continuously provided in the injection chamber and stirs the liquid and the injection liquid. .   The liquid injection mixing apparatus according to claim 7, wherein the injection liquid dispersion nozzle has one injection liquid injection hole.   The liquid injection mixing apparatus according to claim 7, wherein the injection liquid dispersion nozzle has a plurality of injection liquid injection holes.