JPH06210147A - Method and device for mixing gas and liquid under pressure - Google Patents

Abstract

PURPOSE:To continuously and efficiently carry out a gas and liq. reaction and gas and liq. dissolution at a low flow rate of gas. CONSTITUTION:A pipeline 10 is graded so that a gas and liq. mixture flows from the upper part down to the lower part while flowing rapidly and slowly. A throttle 18 is furnished at the outlet or on the downstream side of the pipeline 10, and pressurized gas and liq. are introduced into the pipeline 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-liquid pressurizing and mixing method and a gas-liquid pressurizing and mixing apparatus for reacting a gas and a liquid under pressure or supplying pressurized water in which the gas is in a supersaturated state. .

[0002]

2. Description of the Related Art Conventionally, as a method of reacting a gas and a liquid or dissolving a gas in a liquid, a liquid in which a gas is desired to be dissolved is stored in a pressure tank, and a large amount of gas is sent into the liquid. There has been a gas-liquid dissolution mixing method in which a gas-liquid reaction and a gas are dissolved in the pressure tank.

[0003]

In the case of using the above-mentioned pressure tank of the prior art, since the liquid is stopped in this pressure tank, gas-liquid is continuously reacted in the pressure tank. Or, it could not be dissolved. In addition, in an apparatus using this pressure tank, in order to increase the contact area of the gas with the liquid, it is necessary to send a large amount of gas into the liquid, which makes it difficult to react with a small amount of gas.
In particular, when an expensive gas is used, the gas is wasted a lot and the efficiency is low.

The present invention has been made in view of the above problems of the prior art, and a gas-liquid pressure mixing method capable of continuously and efficiently performing gas-liquid reaction or gas-liquid dissolution even with a small gas flow rate, and An object is to provide a gas-liquid pressure mixing device.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a flow path is formed in such a gradient that a mixed flow of gas and liquid repeats a gradual repetition and flows downward from the top, and the flow path is throttled at the outlet or downstream of the flow path. Is provided, and the pressurized gas and liquid are caused to flow into the flow path, and the gas-liquid pressure mixing method is performed. Furthermore, the gradient of the flow path is formed in a shape in which the slope is gradually repeated, and the gas-liquid mixed flow flows down from above.

Further, the present invention is a gas-liquid pressurizing and mixing apparatus in which a flow path formed in a gradient of repeated graduation is provided, and a throttle is provided at the outlet or downstream of this flow path. In addition, the gradient of the flow path is formed in a shape in which the gradient is repeated gradually.

Further, the gas-liquid pressurizing and mixing apparatus is provided with an exhaust port above the stepwise flow-down flow path to exhaust the gas expanded in the flow path when the system is stopped. Further, an intermediate throttle having a larger diameter than that of the throttle is provided in the middle of the stepwise formed flow path, and pressure measuring means for measuring at least the outlet side pressure of the intermediate throttle in the flow path is provided. It is a gas-liquid pressure mixing device. Further, between the flow path and the throttle that flow down in stages, a branch flow path protruding upward is provided, and a valve or throttle is attached to the end of this branch flow path, and excess air is exhausted by this valve or throttle. This is a gas-liquid pressurizing and mixing device whose pressurization can be adjusted by a valve.

[0008]

In the gas-liquid pressurizing and mixing method and the gas-liquid pressurizing and mixing apparatus of the present invention, a flow path from top to bottom is formed step by step while repeating rapidity, and a gas-liquid mixed flow is caused to flow in this flow path. As a result, in the flow path, a gas flows in the upper part of the flow path and a liquid flows in the lower part of the flow path, and a flow having a wide contact area of gas and liquid is obtained. The static pressure inside the flow path is increased and the gas-liquid reaction and dissolution efficiency are increased by providing an outlet or a throttle downstream of the flow path that gradually flows from top to bottom while repeating the gradual repetition. Further, since the outlet is lower than the inlet of the gas-liquid mixed flow, the gas-liquid mixed flow becomes stagnant in the flow channel, and further, in the flow channel, the liquid having a higher density is easier to flow out than the gas. Therefore, the amount of gas stays in the flow channel more than that of the liquid, and a high gas-liquid ratio can be obtained in the flow channel even if the gas-liquid ratio is low outside the flow channel. Therefore, highly efficient gas-liquid reaction and gas dissolution are performed inside the gas-liquid pressure mixer.

Further, the gas-liquid pressurizing and mixing apparatus of the present invention is provided with an exhaust port at the upper part of the flow path for removing gas when the inflow of the gas-liquid mixed flow is stopped, and is added when the inflow of the gas-liquid mixed flow is stopped. This prevents the gas staying in the flow channel from expanding due to the pressure loss and blowing out from the flow channel. In order to check the state of the gas-liquid pressurizing mixer, an intermediate throttle having a larger diameter than the throttle on the outlet side is provided in the middle of the flow path, and the pressure behind it is measured to determine the emergency situation of the gas-liquid pressurizing mixer. Can be detected more accurately. Further, by adjusting a valve provided at the end of the branch flow path, exhaust gas and excess pressure in the flow path are adjusted.

[0010]

Embodiments of the gas-liquid pressure mixing method and the gas-liquid pressure mixing apparatus of the present invention will be described below with reference to the drawings.
1 and 2 show a gas-liquid pressurizing and mixing apparatus 1 according to a first embodiment of the present invention. In this embodiment, a conduit 1 forming a flow path is formed.
0 is provided in an S shape, and the position of the inlet portion 12 of the pipe 10 is set higher than the position of the outlet portion 14. An inlet pipe line 13 is connected to the inlet portion 12, and an outlet pipe line 15 is connected to the outlet portion 14. The gradient of the conduit 10 is formed in a substantially horizontal portion and a portion curved in the vertical direction, and is a gradient that repeats gentleness. Then, as shown in FIG. 2, the pressurized gas-liquid mixed flow 16 is injected into the conduit 10 from the inlet 12. And the outlet section 14
Is provided with a throttle 18 for increasing the static pressure in the pipe 10.

In the gas-liquid pressurizing and mixing method apparatus 1 of this embodiment, when the gas-liquid mixed flow 16 pressurized to a predetermined pressure from the inlet portion 12 is first injected into the pipe line 10, the gas is generated inside the pipe line 10. It is split into stream 20 and liquid stream 22. Then, the inside of the pipeline 10 is further pressurized by the throttle 18 provided at the outlet portion 14 of the pipeline 10. Here, the relationship between the pressurization and the throttle 18 is given by the following equation from Bernoulli's theorem when the internal size of the conduit 10 is sufficiently large. P = ρu ^2/2 P: pressure in line within 10 [rho: density of the liquid u: Inside a flow rate of the gas-liquid pressurized mixing apparatus 1 of this embodiment in the diaphragm 18, gas and liquid under pressure Since a large contact area is obtained between the two, it is a condition that the gas-liquid reaction and the gas dissolution in the liquid are performed very well. In addition, the conduit 10 of the gas-liquid pressure mixing device 1
Inside, the outlet portion 14 is provided at a position lower than the inlet portion 12, so that the liquid flow 22 of the gas-liquid mixed flow is more likely to flow downward, and the gas flow 20 of the gas-liquid pressurized mixing device 1 is more likely to flow. It becomes stuck in the upper part of the pipeline 10, so that
Even if the gas-liquid mixed flow flowing into the gas-liquid pressurized mixing device 1 has a low gas ratio, the gas ratio becomes large inside the gas-liquid pressurized mixing device 1. As a result, the gas-liquid reaction and the gas dissolution into the liquid can be efficiently performed even with a small amount of gas.

[0012] It should be noted that the setting of the conduit 10 does not necessarily require that the surface on which the conduit 10 is formed be in the vertical direction, and may be inclined. Further, the meandering pipeline 10 does not necessarily have to have a portion parallel to the horizontal plane. Further, in the figure, the pipe line 10 meanders three times for convenience, but the inlet 1
The number of meandering may be any number as long as the condition that the outlet portion 14 is lower than 2 is satisfied. Also, from the entrance 12 to the exit 1
If the condition that 4 is low is satisfied, the middle part of the pipeline 10 may be elevated.

Further, the gas and the liquid may be separately injected into the conduit 10. In this case, at least the gas is pressurized to a predetermined pressure and then injected. Furthermore, the restrictor 18 may be attached at a position immediately after the gas-liquid pressurizing and mixing device, or at a position downstream of the outlet portion 14. Further, the throttle 18 may be one having one hole as shown in FIG. 2 or one having a plurality of holes. Further, the throttle 18 may be provided with a flow rate control valve or the like to make the flow rate variable. good.

Next, a second embodiment of the present invention is shown in FIG.
Here, the same members as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted. The gas-liquid pressure mixing device 2 of this embodiment is
The pipe line 10 including a horizontal portion 10a and a vertical portion 10b is provided by being assembled in a box shape. Again, the entrance 12
Anything can be used as long as the position of the outlet portion 14 is set lower. With this configuration, the gas-liquid pressurizing and mixing device 2 can be made small, and the gas-liquid reaction and dissolution can be efficiently performed.

Next, a third embodiment of the present invention is shown in FIG.
Here, the same members as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted. The gas-liquid pressure mixing device 3 of this embodiment is
The installation position of the outflow conduit 15 is set higher than the installation position of the inflow conduit 13. In this case, an upward flow path 26 is provided inside the gas-liquid pressurizing and mixing device 3, and a flow from top to bottom is formed after the upward flow path 26. Therefore, the gas-liquid pressure mixing device 3 of this embodiment is used.
In, the portion corresponding to the inlet portion 12 in the above embodiment is a predetermined portion of the conduit 10 after the upward flow passage 26.

Next, a fourth embodiment of the present invention is shown in FIG.
Here, the same members as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted. The gas-liquid pressure mixing device 4 of this embodiment is
The exhaust pipe line 28 is provided. A valve 30 is attached to the end of the exhaust pipe 28.

As a result, when the flow of the gas-liquid mixed flow into the gas-liquid pressure mixing device 4 is stopped, the valve 30 is opened so that the pressurized gas flow 2 in the gas-liquid pressure mixing device 4 is opened.
It is possible to prevent the gas of 0 from expanding and flowing out to the inflow conduit 13 and the outflow conduit 15.

Next, FIG. 6 shows a fifth embodiment of the present invention.
Here, the same members as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted. The gas-liquid pressure mixing device 5 of this embodiment is
An intermediate throttle 32 is provided in the middle of the pipeline of the gas-liquid pressure mixing device 5. The intermediate throttle 32 is a gas-liquid pressure mixing device 5
The aperture diameter of the aperture is larger than that of the aperture 18 provided at the outlet 14 of the. When the intermediate throttle 32 is provided, the pressure in the flow passage 10d after the intermediate throttle 32 is lower than that in the flow passage 10c before the intermediate throttle 32. Then, by measuring the pressurized state of the flow passage 10c before the intermediate throttle 32 and the flow passage 10d after the intermediate throttle 32, an emergency situation such as an abnormally high pressure in the gas-liquid pressurizing and mixing device 5 is obtained. Can be sensed, and the gas-liquid pressure mixing device 5 can be prevented from bursting or the like in advance. Here, in general, the conduit 10d after the intermediate stop 32
It can be understood that the abnormal situation occurs when the pressure of 1 approaches the pressure of the previous pipeline 10c. In addition, the intermediate diaphragm 3
Since the pressure in the conduit 10c before 2 is known in advance as the set pressure of the gas-liquid mixed flow to be injected, at least by measuring the pressure in the conduit 10d after the intermediate throttle 32, this gas can also be measured. It is possible to detect an abnormality in the liquid pressure mixing device 5.

Next, a sixth embodiment of the present invention is shown in FIG.
Here, the same members as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted. The gas-liquid pressure mixing device 6 of this embodiment is
A branch flow passage 34 protruding upward between the flow passage 10 and the throttle 18 of the gas-liquid pressurizing and mixing device 6 is formed from a branch point 36 via a pipe passage 35, and a pipe 37 is formed from the branch flow passage 34. It is connected to the flow rate control valve 38 via. Gas-liquid pressure mixing device 6
Since the gas flowing inside has a low density, when it reaches the branch point 36, most of the gas flows to the side of the flow path 34 protruding upward, and the pipe 3
It flows through 7 to the flow control valve 38. Accordingly, by appropriately adjusting the flow rate adjusting valve 38, it is possible to simultaneously exhaust the excess gas and adjust the pressurized state. When the pressure in the gas-liquid pressurizing and mixing device 6 is fixed, it is possible to use a throttle having a constant diameter instead of the flow rate control valve 38.

Next, a seventh embodiment of the present invention is shown in FIG.
Here, the same members as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted. The gas-liquid pressure mixing device 7 of this embodiment is
An example of an apparatus to which all the configurations shown in the fourth to sixth embodiments are attached is shown. That is, the exhaust pipe line 28 and the valve 30 are provided above the gas-liquid pressurizing and mixing device 7, the intermediate throttle 32 is attached in the middle of the pipe line 10, and immediately before the outlet portion 14 in which the throttle 18 is provided, A branch conduit 34 is provided. When a wastewater treatment using ozone was tested using this device, ozone consumption was 99.4% of the injected ozone, and a very high ozone utilization efficiency was obtained.

Next, an eighth embodiment of the present invention is shown in FIG.
Here, the same members as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted. The gas-liquid pressure mixing device 8 of this embodiment is
The conduit 10 is formed in a step-like flow path shape instead of a meandering flow path.

Next, a ninth embodiment of the present invention is shown in FIG. Here, the same members as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted. Gas-liquid pressure mixing device 9 of this embodiment
In the above, the passage 18 is provided with the throttle 18 after passing through a flow passage formed with a single steep gradient.

[0023]

EFFECTS OF THE INVENTION The gas-liquid pressurizing and mixing apparatus of the present invention is highly efficient and can continuously continuously perform this gas-liquid reaction or gas-liquid reaction simply by pumping gas and liquid or a mixed stream thereof to this apparatus. It can dissolve. Further, even if the proportion of gas is small, highly efficient gas-liquid reaction and gas dissolution can be performed, and especially when expensive gas is used, there is no waste of gas and the gas utilization efficiency is extremely good.

[Brief description of drawings]

FIG. 1 is a front view showing a gas-liquid pressure mixing device according to a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the gas-liquid pressure mixing device of the first embodiment.

FIG. 3 is a vertical cross-sectional view showing a gas-liquid pressure mixing device of a second embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view showing a gas-liquid pressure mixing device according to a third embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view showing a gas-liquid pressure mixing device of a fourth embodiment of the present invention.

FIG. 6 is a vertical cross-sectional view showing a gas-liquid pressure mixing device according to a fifth embodiment of the present invention.

FIG. 7 is a vertical cross-sectional view showing a gas-liquid pressure mixing device of a sixth embodiment of the present invention.

FIG. 8 is a vertical cross-sectional view showing a gas-liquid pressure mixing device according to a seventh embodiment of the present invention.

FIG. 9 is a vertical cross-sectional view showing a gas-liquid pressure mixing device of an eighth embodiment of the present invention.

FIG. 10 is a vertical cross-sectional view showing a gas-liquid pressure mixing device of a ninth embodiment of the present invention.

[Explanation of symbols]

 1-9 Gas-Liquid Pressurizing Mixer 12 Inlet 13 Inflow Pipe 14 Outlet 15 Outflow Pipe 18 Throttle 20 Gas Flow 22 Liquid Flow 28 Exhaust Pipe 32 Intermediate Throttle 34 Branch Pipe

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Tokio Hori 1-10-40 Mikuni Honcho, Yodogawa-ku, Osaka City, Osaka Prefecture Izumi Electric Co., Ltd. (72) Masakazu Kashiwa Mikunihonmachi, Yodogawa-ku, Osaka 1-10-40 Izumi Electric Co., Ltd.

Claims (7)

[Claims] 1. A flow path is formed with a gradient such that a mixed flow of gas and liquid repeats slow and rapid flow down from top to bottom, and a throttle is provided at the outlet or downstream of the flow path, A gas-liquid pressurizing and mixing method characterized in that pressurized gas and liquid are poured. 2. The gradient of the flow path is formed in a shape in which the gradient is repeated gradually, and the gas is pressurized and flows into the flow path at a high speed, and flows down from top to bottom. 1. The gas-liquid pressure mixing method according to 1. 3. A gas-liquid pressurizing / mixing device, characterized in that a flow path formed in a gradient of repeated graduation is provided, and a throttle is provided at the outlet or downstream of this flow path. 4. The gas-liquid pressurizing and mixing apparatus according to claim 3, wherein the gradient of the flow path is formed in a shape that gradually and gradually repeats. 5. The gas-liquid pressurizing / mixing device according to claim 4, wherein an exhaust port for exhausting the gas expanded in the flow passage is provided above the flow passage that gradually flows down. 6. An intermediate throttle having a diameter larger than that of the throttle is provided in the middle of the stepwise formed channel, and the pressure in at least the outlet side of the intermediate throttle in the channel is measured. The pressure measuring means is provided, and it is characterized by the above-mentioned.
The gas-liquid pressure mixing device described. 7. A valve for projecting upwardly is provided between the stepwise flow-off channel and the throttle, and a valve for exhausting excess air and adjusting pressurization is provided in front of the branch channel. The gas-liquid pressure mixing device according to claim 4, further comprising a throttle for exhausting the excess air.