JP2005144320A - Fluid mixing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluid mixing apparatus which can mix a plurality of fluids at a high mixing ratio and which is made compact, operated at considerably low running cost, and produced at a considerably saved cost. <P>SOLUTION: The mixing apparatus for mixing two or more kinds of fluids produces a mixed liquid by mixing pressurized first fluid and second fluid by a first mixer 1; mixing the mixed liquid by jetting the mixed liquid to a mixing container 21 of a second mixer 2 and thereby generating swirling current in the mixing container 21; and sending the mixed liquid out of an outlet 21c formed at the tip end of a taper part 21b formed to be narrow toward the tip end. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a fluid mixer that mixes a plurality of fluids, and more particularly to a fluid mixer that jets fluid into a container and mixes the plurality of fluids by generating a vortex by the jet force of the fluid.

  As a mixing device that mixes liquid and gas, a device that mixes fluid stored in a tank by rotation of a stirring member is known. However, such an apparatus for mixing by agitation has a problem in that the apparatus is large, so that a large space is required for installation, the production cost is high, and the power cost is high, and the processing cost is high. In particular, when gas is mixed in the liquid, mixing is difficult by rotation of the stirring member, and the gas concentration in the liquid cannot be increased.

  In the case of mixing a gas in such a liquid, for example, an apparatus disclosed in Japanese Patent Application Laid-Open No. 2001-120970 (Patent Document 1) has been proposed as an oxygen dissolving method for mixing so as to dissolve oxygen in water. In the method shown in Patent Document 1, water is injected obliquely from above the liquid surface into the gas-liquid mixing tank levitated on the water surface by a nozzle provided at the upper part of the outer periphery of the tank to entrain oxygen in the tank. When the air bubbles are refined and the vortex is generated, and the air bubbles are allowed to flow naturally through the hose or the spiral pipe from the lower part of the tank together with the vortex, the refined air bubbles are gradually removed using the water pressure. By reducing the pressure, oxygen is dissolved under pressure. However, a large tank is required to obtain the water pressure necessary to gradually reduce the fine bubbles entrained with oxygen. Installation of this gas-liquid mixing tank requires a large space, and there is a problem that the production cost is high.

  On the other hand, ozone water with a bactericidal action is used as a water used for sterilization of restaurants, restaurants, schools, etc., medical relations such as hospitals, or sterilization of pool water. Also in this apparatus for generating ozone water, ozone water is generated by mixing ozone gas with raw water such as tap water. Although various types of mixers are used in this ozone water generator, a mixer that can provide the ozone gas content necessary for medical purposes such as hospitals is inevitably expensive, so it is inexpensive. The advent of a mixer capable of obtaining a high ozone gas content is awaited.

JP 2001-120970 A

  The problem to be solved by the present invention is to provide a fluid mixer that can mix a plurality of fluids at a high mixing ratio, and that is small in size and can greatly reduce manufacturing and operating costs. is there.

In order to achieve the above object, the invention of claim 1 is characterized in that the mixing device for mixing two or more fluids is mixed by injecting the second fluid into the first fluid pressurized by a pump or the like. A first mixer for generating a mixed liquid, a cylindrical mixing container provided with a delivery port at the tip of a tapered portion tapered toward the top, and the mixed liquid is injected into the mixing container And a second mixer for generating and mixing the vortex in the container,
The gist is that the liquid mixture mixed by the first mixer is mixed by the second mixer and then sent out from the delivery port.

  According to a second aspect of the present invention, in the first mixer, a small-diameter portion having a small inner diameter is provided in a flow passage through which the first fluid flows, and an inlet for injecting the second fluid into the small-diameter portion. The gist is to produce the mixed liquid in the small diameter portion.

  Furthermore, the gist of the invention of claim 3 is that liquid is circulated through the flow passage of the first mixer, and gas is injected into the inlet and mixed.

  Furthermore, in the invention of claim 4, the second mixer is provided with a cylindrical portion formed in a substantially cylindrical shape, a tapered portion tapered from the cylindrical portion toward the upper portion, and a tip of the tapered portion. An injection port connected to the first mixer for injecting the mixed liquid in a substantially tangential direction with respect to the inner peripheral surface of the mixing container. The gist is that vortex is generated in the container by the spraying force of the liquid mixture sprayed from the mouth and mixed.

  Further, the gist of the invention of claim 5 is that the injection port is provided in the vicinity of the bottom of the cylindrical portion of the mixing container and generates a vortex rising in the container.

  According to a sixth aspect of the present invention, the injection port is provided in the tapered portion and is provided in a slightly lower direction to generate a vortex that descends along the inner peripheral surface of the container and to reduce the speed. The gist of the invention is to raise the mixed liquid from the center and feed it from the outlet.

  The gist of the invention of claim 7 is that the mixing container is set such that the height of the cylindrical portion is smaller than the diameter.

  According to the present invention, the mixed liquid obtained by mixing the first fluid with the first fluid by the first mixer is injected into the mixing container of the second mixer to generate vortex and mix the mixture. Therefore, since the fluid is mixed by the mixers of different mixing methods, the mixing ratio of the plurality of fluids can be greatly increased. In addition, since the mixing container of the second mixer is provided with a taper portion tapered toward the upper portion and a delivery port at the tip thereof, the fluid is pressurized by the taper portion. It is possible to increase the mixing ratio. Since the fluid mixed in this way is sent out from the delivery port provided at the tip, it is possible to send out the fluid without stagnation and maintaining a high mixing ratio.

  According to the second aspect of the present invention, the first mixer is provided with the small diameter portion in the flow passage that circulates the first fluid, and when the first fluid circulates through the small diameter portion. Since the second fluid is injected into the generated negative pressure region, the mixing ratio of the mixed liquid can be increased.

  Further, according to the invention described in claim 3, when a liquid is circulated through the flow passage of the first mixer and a gas is injected from the injection port, the generation of the negative pressure region is facilitated by the circulation of the liquid, Mixing with gas can be facilitated.

  Furthermore, according to the invention described in claim 4, by injecting the liquid mixture in a substantially tangential direction to the inner peripheral surface in the mixing container formed in the substantially cylindrical shape of the second mixer. A vortex can be generated in the container by the jetting force of the mixed liquid, and the mixed liquid can be efficiently mixed by the vortex without using other power. Further, since the vortex generated in the container rises and is pressurized by the taper portion and further mixed, the mixture is sent out from the delivery port, so that it is possible to send out the liquid mixture having a high mixing ratio.

  Further, according to the invention described in claim 5, by providing an injection port near the bottom of the cylindrical portion of the mixing container, and by injecting the mixed liquid in a substantially tangential direction with respect to the inner peripheral surface in the mixing container, Since a rising vortex is generated in the container, the mixing ratio of the mixed liquid can be increased.

  Further, according to the invention described in claim 6, by providing the injection port in the tapered portion and directing the injection port in a slightly lower direction, the eddy current descending along the inner peripheral surface of the container by the injected mixed liquid is generated. Since it occurs, the mixing rate can be increased. In addition, the flow in the upward direction is generated in the center of the container due to the vortex, and the mixed liquid that has been decelerated is lifted from the center and sent out from the delivery port. Can be increased.

  According to the seventh aspect of the present invention, when the height of the cylindrical portion of the container is set smaller than the diameter, the vortex generated in the container due to the injection of the mixed liquid is decelerated due to the viscosity of the fluid. Since the height is small, the mixing efficiency can be increased without causing fluid stagnation.

  A mixing device that mixes two or more fluids includes a first mixer and a second mixer. The 1st mixer is comprised so that it may mix by inject | pouring the 2nd fluid into the 1st fluid pressurized by the pump etc., and may produce | generate a liquid mixture. The second mixer has a cylindrical mixing container provided with a delivery port at the tip of a tapered portion tapered toward the top, and the mixed liquid is injected into the mixing container by injecting the mixed liquid into the mixing container. A vortex is generated and mixed. First, the first mixer is provided with an inlet for injecting the second fluid, and when the first fluid pressurized by the pump is circulated, the second fluid is injected from the inlet. As a result, the first and second fluids are mixed to produce a mixed liquid. This mixed liquid is injected into the cylindrical mixing container from the injection port of the second mixer while being pressurized by the pump. The mixed solution injected from the injection port generates a vortex along the inner peripheral surface of the mixing container, and the mixed solution is mixed again while being rapidly stirred by the vortex. Thereafter, the mixed liquid rotating in the mixing container by the vortex is sent out from a delivery port provided at the tip through a tapered portion tapered toward the upper part.

  FIG. 1 is a block diagram showing the overall configuration of a fluid mixing apparatus according to the present invention. This fluid mixing apparatus includes a first mixer 1 and a second mixer 2. In the first mixer 1, for example, a first fluid made of a liquid such as water, a solution, and a chemical liquid and a second fluid made of a gas such as a gas are mixed. In addition, in this Example 1, since the fluid mixing apparatus used for an ozone water production | generation apparatus is illustrated, the 1st fluid is mixed with the raw material water used as the raw material of ozone water, and the 2nd fluid is mixed with raw material water, and ozone It is ozone gas generated in water.

  As shown in FIG. 3, the first mixer 1 has a small-diameter portion with a small inner diameter in order to inject raw water sent through the pipe 4 while being pressurized by the pump 3. A nozzle 11 is provided. The injection nozzle 11 increases the flow rate of the raw material water injected from the injection port 11a by forming the injection port 11a with a smaller diameter than the inlet side into which the raw material water is taken. Further, an injection port 12 for injecting high-concentration ozone gas generated by an ozone gas generation device (not shown) is disposed near the injection port 11a of the injection nozzle 11.

  And when the raw material water pressurized by the pump 3 from the injection port 11a of the injection nozzle 11 is injected, since the flow velocity is high, the pressure in the vicinity of the injection port 11a is reduced, the negative pressure region 13 is formed, and cavitation occurs. Since the negative pressure region 13 is depressurized, the ozone gas injected from the inlet 12 is in a state of being easily mixed, so that a large amount of ozone gas can be mixed into the raw water, and as a result, A mixed liquid in which ozone gas is mixed is generated. This mixed liquid is sent to the second mixer 2 via the pipe 5. In addition, as a structure of the 1st mixer 1, while providing the small diameter part which made small the internal diameter of the flow path which distribute | circulates raw material water, the injection port which inject | pours ozone gas into this small diameter part is provided, and a liquid mixture is supplied in the said small diameter part. It may be generated. In this configuration, since the flow rate is increased when the raw material water flows through the small diameter portion, the pressure is reduced, so that the ozone gas injected from the inlet is easily mixed with the raw material water. In addition, when the raw water is already pressurized such as tap water, the raw water is pressurized by a pump in the water supply source. Furthermore, the present invention can be similarly applied when the raw material water is pressurized from a high-level water storage tank due to a difference in altitude.

  Further, the second mixer 2 is configured to provide the mixing nozzle 21 with the injection nozzle 22 and to generate the vortex in the mixing container 21 by injecting the mixed liquid from the injection nozzle 22 to mix. ing. That is, the mixing container 21 has a tapered portion 21b formed in a tapered shape at the upper portion of a cylindrical portion 21a formed in a cylindrical shape, and a delivery port 21c is provided at the tip of the tapered portion 21b. Further, the delivery pipe 6 is connected to the delivery port 21c. Moreover, the height of the cylindrical part 21a is set smaller than the diameter of the cylindrical part 21a. This is related to the viscosity of the liquid mixture. Immediately after being injected from the injection nozzle 22, a vigorous vortex 7 can be generated by the injection force, but when the cylindrical portion 21 a is rotated about three times, the force is generated by the viscosity. The power that just mixes the liquid mixture is reduced. Accordingly, when the height of the cylindrical portion 21a is made larger than the diameter, the mixed solution only rotates gently and cannot be mixed, and in some cases, the mixed ozone gas and the raw water are separated again. Sometimes. For this reason, by setting the cylindrical portion 21a to a height within a range where the mixed solution can be mixed, ozone gas and raw water can be sent out without being separated again.

  The injection nozzle 22 is provided in the vicinity of the bottom of the cylindrical portion 21a of the mixing container 21 and protrudes into the cylindrical portion 21a. Further, the direction of the injection nozzle 22 is directed substantially tangential to the inner peripheral surface of the cylindrical portion 21a of the mixing container 21. One end of the injection nozzle 22 is connected to the first mixer 1.

  Next, the operation of the second mixer 2 will be described. The liquid mixture sent from the first mixer 1 via the pipe 5 is jetted from the jet nozzle 22 in a state of being pressurized by the pump 3. By injecting the mixed liquid from the injection nozzle 22 toward the inner peripheral surface of the cylindrical portion 21a in a substantially tangential direction, the direction can be changed along the inner peripheral surface of the cylindrical portion 21a as shown by a dotted line in FIG. As a result, a vortex 7 is generated, and the mixture is stirred by the vortex 7. Eventually, when the cylindrical portion 21a is filled with the liquid mixture, the vortex 7 reaches the tapered portion 21b. Since the taper portion 21b is formed to be tapered toward the upper delivery port 21c, the rotating radius of the vortex 7 is reduced, so that the pressure is applied and the mixing is accelerated. And the liquid mixture mixed by the vortex | eddy_current 7 is sent out through the delivery pipe | tube 6 from the delivery port 21c.

  In this way, vortex flow is generated in the mixing vessel 21 by jetting the mixed solution from the jet nozzle 22, but the vortex flow 7 decays due to the viscosity of the mixed solution itself, so that the mixing vessel 21 of the second mixer 2 is It becomes possible to reduce the size. Therefore, the fluid mixing device can also be reduced in size.

  As described above, in Example 1, since raw material water and ozone gas are mixed, a certain level of concentration is reached by the first mixer 1, but in this state, ozone gas separated from raw material water remains. . Therefore, ozone gas is injected from the injection nozzle 22 together with the mixed liquid. Thereafter, when the vortex 7 is generated in the mixing container 21 by spraying the mixed liquid from the spray nozzle 22, the mixed liquid and ozone gas are forcibly stirred, and thus ultrafine bubbles are generated in the mixing container 21. The mixture becomes milky white. In such a state, the remaining ozone gas is mixed into the mixed liquid. As a result, a mixed liquid in which the concentration of ozone gas is further increased can be generated.

  In FIG. 1, the injection nozzle 22 is directed substantially tangential to the inner peripheral surface of the cylindrical portion 21 a, but the mixed liquid is injected into the mixing container 21 by sequentially injecting the mixed liquid from the injection nozzle 22. Are filled, and the vortex flows 7 are generated in the mixing container 21 in order to be sent out from the delivery port 21c. Moreover, since the specific gravity of the liquid mixture stirred by the vortex 7 is reduced by the ozone gas, the rising vortex 7 is generated in the mixing container 21 due to this factor.

  FIG. 4 is a block diagram showing a second embodiment of the fluid mixing apparatus according to the present invention. In the second embodiment, the injection nozzle 31 of the second mixer 30 is provided in the tapered portion 21b of the mixing container. 1 and 2 indicate the same configuration, and detailed description thereof is omitted. In FIG. 4, the injection nozzle 31 which injects the liquid mixture sent from the 1st mixer 1 via the piping 5 in the mixing container 21 is provided in the taper part 21b of the mixing container 21, and the direction of the injection nozzle 31 is mixed. The container 21 is directed slightly downward. Furthermore, the injection nozzle 31 is directed substantially in the tangential direction with respect to the inner peripheral surface of the tapered portion 21b, similarly to the injection nozzle 22 shown in FIG. The configuration is the same as that of the first embodiment described above except that the position where the injection nozzle 31 is provided is different.

  Next, the operation of the second mixer 30 in the second embodiment will be described. The liquid mixture sent from the first mixer 1 via the pipe 5 is jetted slightly downward from the jet nozzle 31 while being pressurized by the pump 3. By injecting the mixed liquid in a direction substantially tangential to the inner peripheral surface of the tapered portion 21b, the direction is changed along the inner peripheral surface of the tapered portion 21b or the cylindrical portion 21a as shown by a dotted line in FIG. As a result, a vortex 32 is generated, and the mixture is stirred by the vortex 32. Since the spray nozzle 31 is directed slightly downward, the vortex 32 generated by the mixed liquid descends toward the bottom of the cylindrical portion 21a. In this state where the vortex 32 is generated, the inside of the mixing container 21 becomes a tornado. For this reason, when the mixed liquid reaches the bottom of the cylindrical portion 21a, the vortex 32 is decelerated due to the viscosity of the mixed liquid itself, and eventually the mixed liquid rolls upward. Since the vortex 32 is gentle in the central portion of the mixing container 21, the mixed liquid reaches the delivery port 21 c through the central portion and is sent out through the delivery pipe 6.

  Also in the second embodiment, the ozone gas that has not been mixed by the first mixer 1 is jetted together with the liquid mixture from the jet nozzle 31, but thereafter, the liquid mixture and the ozone gas are separated by the vortex 32 in the mixing container 21. The mixture is forcibly stirred and the mixed liquid in the mixing container 21 becomes milky white, and the remaining ozone gas is mixed with the mixed liquid. As a result, a mixed liquid in which the concentration of ozone gas is further increased can be obtained.

  In Example 1 and Example 2 described above, it is desirable that the mixing container 22 of the second mixers 21 and 30 has no irregularities on at least the inner peripheral surface, but in order to promote the generation of vortex flow, the mixing container 22 Spiral ribs may be formed on the inner peripheral surface. Further, in order to change the eddy current to some extent, irregularities may be formed on the inner peripheral surface or the bottom surface of the mixing container 22.

  The fluid mixing apparatus according to the present invention described above is used for an ozone water generating apparatus. Hereinafter, the ozone water generator shown in FIGS. 5 to 7 will be described. The ozone water generation device 40 is roughly divided into a gas generation path for generating ozone gas and a water path for generating ozone water. First, the gas generation path includes an intake port 41 for taking in raw air from outside air, a dehumidifier 42 for adjusting the humidity of the raw air to a predetermined value, a transport pump 43 for transporting raw air into the path, and raw air. A high voltage for applying a high voltage to the ozone gas generating device 45 that generates ozone gas from the oxygen in the discharge body 44, the piping 46 that circulates the raw material air therethrough, and the discharge body 44 of the ozone gas generating device 45. A power supply 47 is provided. In FIG. 5, the gas generation path is indicated by dotted arrows. In addition, in FIG. 5, the code | symbol 54 is a controller for controlling an ozone water production | generation apparatus.

  On the other hand, the water path indicated by the solid line arrows is a fluid mixing device for generating ozone water while injecting and mixing the intake gas 48 for taking in raw material water and the ozone gas generated by the ozone gas generating device 45 into the raw material water. 49, a precooler 50 for precooling the raw material air with the ozone water, an outlet 21c for flowing out the ozone water generated by the fluid mixing device 49, and a pipe for circulating the raw water or ozone water through these water paths 52. The raw water is circulated in the water path by the pump 56.

  In the gas generation path described above, the raw material air of the outside air taken in from the intake port 41 is sent to the dehumidifier 42 by the pump 43 and lowered to a predetermined humidity. As a dehumidifying means for dehumidifying and cooling the raw air, a dehumidifier 42 that dehumidifies using a Peltier element as a cooling medium is used. The raw material air that has been dehumidified and cooled is introduced into the ozone gas generator 45. It is known that the ozone gas generation device 45 changes the generation efficiency of ozone gas depending on the humidity of the raw material air. For this reason, the temperature and humidity management of the raw material air introduced into the ozone gas generation device 45 is controlled by the temperature sensor 55 provided between the dehumidifier 42 and the ozone gas generation device 45.

  On the other hand, in order to increase the cooling capacity in the dehumidifier 42 using the above-described Peltier element, the raw air to be dehumidified and cooled by the dehumidifier 42 is preliminarily cooled by the preliminary cooler 50. That is, the raw material air taken into the dehumidifier 42 is taken from the precooling chamber 51 of the precooler 50.

  The ozone gas generated by the ozone gas generating device 45 is sent to the fluid mixing device 49 described above via the check valve 53 to generate ozone water. The fluid mixing device 49 is configured as described above, and the raw water and the ozone gas are mixed by the first and second mixers and flowed out from the outlet 21c.

  As described above, when the fluid mixing device according to the present invention is used in an ozone water generating device, the ozone gas generated by the ozone gas generating device 45 and the raw water are first mixed by the first mixer 1 to obtain a mixed solution. This mixture liquid is further mixed in the second mixer 2 by generating swirl, so that the ozone gas not mixed by the first mixer 1 is forcibly mixed with the mixture liquid. Increased ozone water can be obtained. In addition, the fluid mixing device can be configured in a small size, and the configuration is simple, so that the manufacturing cost can be reduced. Furthermore, since the operating cost can be greatly reduced, the manufacturing cost of the ozone water generating device can be reduced, and the operating cost of the ozone water generating device can be reduced.

  The present invention provides a mixer that performs mixing of gases such as oxygen, chlorine, and ozone and liquids such as water, solutions, and chemicals that can be mixed with these gases, mixing of the gases, or mixing of the liquids. Applicable.

It is a block diagram which shows 1st Embodiment of the fluid mixing apparatus concerning this invention. It is a top view of the fluid mixing apparatus shown in FIG. It is sectional drawing which shows the 1st mixer of the fluid mixing apparatus concerning this invention. It is a block diagram which shows 2nd Embodiment of the fluid mixing apparatus concerning this invention. It is a block diagram which shows the ozone water production | generation apparatus which uses the fluid mixing apparatus concerning this invention. It is a top view which shows the structure of an ozone water production | generation apparatus. It is a side view which shows the structure of an ozone water production | generation apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st mixer 2 2nd mixer 3 Pump 7 Eddy current 11 Injection nozzle (small diameter part)
12 Inlet 13 Negative pressure region 21 Mixing container 21a Cylindrical part 21b Taper part 21b Outlet 22 Injection nozzle

Claims (7)

A mixing device for mixing two or more fluids,
The mixing device includes: a first mixer that generates a mixed liquid by injecting a second fluid into a first fluid pressurized by a pump or the like;
A cylindrical mixing container provided with a delivery port at the tip of a tapered portion that is tapered toward the upper part, and the mixed liquid is injected into the mixing container to generate a vortex in the container for mixing. A second mixer,
A fluid mixing apparatus, wherein the liquid mixture mixed by the first mixer is mixed by the second mixer and then sent out from the delivery port.   The first mixer is provided with a small-diameter portion having a small inner diameter in a flow passage that circulates the first fluid, and an inlet for injecting a second fluid is provided in the small-diameter portion. The fluid mixing apparatus according to claim 1, wherein the fluid mixture is generated.   The fluid mixing apparatus according to claim 2, wherein a liquid is circulated through the flow passage of the first mixer, and gas is injected into and mixed with the inlet.   The second mixer includes a cylindrical portion formed in a substantially cylindrical shape, a tapered portion tapered from the cylindrical portion toward the upper portion, and a delivery port provided at the tip of the tapered portion; And an injection port connected to the first mixer for injecting the liquid mixture in a substantially tangential direction with respect to the inner peripheral surface of the mixing container, and injection of the liquid mixture to be injected from the injection port The fluid mixing apparatus according to claim 1, wherein a vortex is generated in the container by force to perform mixing.   5. The fluid mixing apparatus according to claim 1, wherein the injection port is provided in the vicinity of a bottom portion of a cylindrical portion of the mixing container, and generates a vortex rising in the container.   The injection port is provided in the taper portion and slightly downward, and generates a vortex that descends the mixed liquid along the inner peripheral surface of the container and raises the decelerated mixed liquid from the center. The fluid mixing device according to claim 1, wherein the fluid mixing device is fed from the delivery port.   The fluid mixing device according to any one of claims 4 to 6, wherein the mixing container has a height of the cylindrical portion set to be smaller than a diameter.

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