JP2574734B2 - Gas-liquid pressurized mixing equipment - Google Patents

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 / mixing apparatus for reacting a gas and a liquid under pressure or supplying pressurized water in which the gas is supersaturated.

[0002]

2. Description of the Related Art Conventionally, as a method of reacting a gas with a liquid or dissolving a gas into a liquid, a liquid to be dissolved or the like is accommodated in a pressurized tank, and a large amount of gas is sent into the liquid. There is a gas-liquid dissolving and mixing method in which a gas-liquid reaction and gas dissolution are performed in the pressurized tank.

[0003]

In the case of using the above-described conventional pressurized tank, since the liquid is stopped in the pressurized tank, gas-liquid is continuously reacted in the pressurized tank. Or it could not be dissolved. In addition, in an apparatus using this pressurized tank, a large amount of gas needs to be sent into the liquid in order to increase the contact area of the gas with the liquid, and it has been difficult to react with a small amount of gas.
In particular, when an expensive gas is used, the gas is wasteful and inefficient.

The present invention has been made in view of the above-mentioned problems of the prior art, and provides a gas-liquid pressurizing / mixing apparatus capable of continuously and efficiently performing a gas-liquid reaction and gas-liquid dissolution even with a small gas flow rate. The purpose is to provide.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided a flow path having a gradient such that a mixed flow of a gas and a liquid flows slowly and steeply from the top to the bottom, and restricts the outlet or downstream of the flow path. A gas and a liquid pressurized into the flow path, and an exhaust port is provided at an upper portion of the flow path that flows down stepwise, and a gas that exhausts the gas expanded in the flow path when the system is stopped. It is a liquid pressure mixing device.

Further, an intermediate restrictor having a larger diameter than the restrictor is provided in the middle of the stepwise formed flow path, and a pressure measuring means for measuring at least a pressure at an outlet side of the intermediate restrictor in the flow path. Is a gas-liquid pressurizing and mixing device provided with
Further, between the flow path and the throttle that flows down in a stepwise manner, a branch flow path that protrudes upward is provided, a valve or a throttle is attached ahead of the branch flow path, and excess air is exhausted by the valve or the throttle. This is a gas-liquid pressurizing and mixing device whose pressure can be adjusted by a valve.

[0007]

The gas-liquid pressurizing and mixing apparatus of the present invention forms a flow path which is stepped from top to bottom while repeating the steepness and steepness, and flows the gas-liquid mixed flow through this 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, so that a flow having a large gas-liquid contact area can be obtained. By providing an outlet or a throttle downstream of the flow passage that flows down stepwise from top to bottom while repeating slowing and rising, the static pressure inside this flow passage is increased to increase the efficiency of gas-liquid reaction and dissolution. Further, since the outlet is lower than the inlet of the gas-liquid mixed flow, the gas-liquid mixed flow is stagnated in the flow path, and further, in the flow path, the liquid having a higher density is more easily outflowed than the gas. As a result, the gas stagnates more in the flow path than the liquid, and a high gas-liquid ratio can be obtained in the flow path even if the gas-liquid ratio is low outside the flow path. For this reason, highly efficient gas-liquid reaction and gas dissolution are performed inside the gas-liquid pressurized mixer.

In the gas-liquid pressurizing and mixing apparatus of the present invention, an exhaust port for venting gas is provided at the upper part of the flow channel when the inflow of the gas-liquid mixed flow is stopped. This prevents the gas remaining in the flow path from expanding due to the pressure disappearing and blowing out from the flow path. In order to check the state of the gas-liquid pressurized mixer, an intermediate restrictor with a larger diameter than the outlet-side restrictor is provided in the middle of the flow path, and the pressure behind the intermediate restrictor is measured. Can be detected more accurately. Further, by adjusting a valve provided at the end of the branch flow path, the excess gas in the flow path is discharged and the pressure is adjusted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gas-liquid pressurizing and mixing apparatus according to 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 pipe 10 forming a flow path is provided in an S shape,
The position of the inlet 12 of the conduit 10 is set higher than the position of the outlet 14. An inlet pipe 13 is connected to the inlet 12, and an outlet pipe 15 is connected to the outlet 14. The gradient of the pipeline 10 is formed in a substantially horizontal portion and a portion curved in the vertical direction, and is a gradient that repeats gradual and steep. Then, as shown in FIG. 2, the pressurized gas-liquid mixed flow 16 is injected into the pipeline 10 from the inlet 12. A throttle 18 for increasing the static pressure in the conduit 10 is provided at the outlet 14.

In the gas-liquid pressurized mixing method apparatus 1 of this embodiment, first, when a gas-liquid mixed flow 16 pressurized to a predetermined pressure is injected into the pipe 10 from the inlet 12, the gas It splits into a stream 20 and a 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 restrictor 18 is given by the following equation according to Bernoulli's theorem when the inside size of the pipe 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 can be obtained between the two, the conditions are such that the gas-liquid reaction and the gas dissolution into the liquid are performed very well. Further, the pipeline 10 of the gas-liquid pressurizing and mixing apparatus 1
Inside, since the outlet 14 is provided at a position lower than the inlet 12, the liquid flow 22 of the gas-liquid mixed flow is more likely to flow downward, and the gas flow 20 is It will be stuck in the upper part of the pipeline 10,
Even if the ratio of gas in the gas-liquid mixed flow flowing into the gas-liquid pressurizing and mixing device 1 is small, the gas ratio inside the gas-liquid pressurizing and mixing device 1 increases. As a result, even with a small amount of gas, efficient gas-liquid reaction and gas dissolution into liquid can be performed.

In the setting of the conduit 10, the surface on which the conduit 10 is formed does not necessarily have to be vertical and may be inclined. Further, the meandering conduit 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.
The number of meandering may be any number as long as the condition that the outlet 14 is lower than 2 is satisfied. In addition, the outlet 1 from the inlet 12
As long as the condition of 4 is low, a portion in the middle of the pipeline 10 may be raised.

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

FIG. 3 shows a second embodiment of the present invention.
Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The gas-liquid pressurizing and mixing apparatus 2 of this embodiment includes:
This is provided with a conduit 10 composed of a horizontal portion 10a and a vertical portion 10b incorporated in a box shape. Again, the entrance 12
What is necessary is just to set the position of the exit part 14 lower than the position. With such a configuration, the gas-liquid pressurizing and mixing device 2 can be made small, and gas-liquid reaction and dissolution can be performed efficiently.

Next, a third embodiment of the present invention is shown in FIG.
Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The gas-liquid pressurizing and mixing apparatus 3 of this embodiment
The installation position of the outflow line 15 is higher than the installation position of the inflow line 13. In this case, an upward flow path 26 is provided inside the gas-liquid pressurizing and mixing device 3, and a flow from above to below is formed after the upward flow path 26. Therefore, the gas-liquid pressurizing and mixing device 3 of this embodiment
In the above, the portion corresponding to the inlet portion 12 in the above embodiment is a predetermined portion of the conduit 10 after the upward flow channel 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 denoted by the same reference numerals, and description thereof will be omitted. The gas-liquid pressurizing and mixing apparatus 4 of this embodiment is
An exhaust pipe 28 is provided. Further, a valve 30 is attached to the end of the exhaust pipe 28.

Thus, when the flow of the gas-liquid mixed flow into the gas-liquid pressurizing and mixing device 4 is stopped, the valve 30 is opened to open the pressurized gas flow 2 in the gas-liquid pressurizing and mixing device 4.
It is possible to prevent the zero gas from expanding and flowing out to the inflow conduit 13 and the outflow conduit 15.

Next, a fifth embodiment of the present invention is shown in FIG.
Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The gas-liquid pressurizing and mixing apparatus 5 of this embodiment is
An intermediate throttle 32 is provided in the middle of the pipe of the gas-liquid pressurizing and mixing device 5. The intermediate throttle 32 is a gas-liquid pressurizing and mixing device 5
The aperture is larger in diameter than the aperture 18 provided at the outlet 14 of FIG. When the intermediate throttle 32 is provided, the pressure in the flow path 10d after the intermediate throttle 32 is lower than the pressure in the flow path 10c before the intermediate throttle 32. Then, by measuring the pressurized state of the flow path 10c before the intermediate restrictor 32 and the flow path 10d after the intermediate restrictor 32, an emergency such as an abnormal increase in the pressure in the gas-liquid pressurizing and mixing device 5 is performed. Can be sensed, and rupture of the gas-liquid pressurizing and mixing device 5 can be prevented in advance. Here, generally, the pipe 10 d after the intermediate throttle 32 is used.
When the pressure of (1) approaches the pressure of the previous conduit 10c, it can be understood that the situation is abnormal. Also, the intermediate aperture 3
Since the pressure in the pipeline 10c before the second throttle 2 is known in advance as the set pressure of the gas-liquid mixed flow to be injected, at least the pressure in the pipeline 10d after the intermediate throttle 32 is measured. An abnormality of the liquid pressure mixing device 5 can be detected.

Next, a sixth embodiment of the present invention is shown in FIG.
Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The gas-liquid pressurizing and mixing device 6 of this embodiment
A branch flow path 34 projecting upward between the flow path 10 and the throttle 18 of the gas-liquid pressurizing / mixing device 6 is formed from a branch point 36 via a pipe 35, and a pipe 37 is formed from the branch flow path 34. It is connected to the flow control valve 38 through the intermediary. Gas-liquid pressurized mixing device 6
Most of the gas flowing through the inside of the pipe 3 when flowing to the branch point 36 due to its low density flows to the side of the flow path 34 protruding upward.
The flow goes to the flow control valve 38 through seven passages. Thus, by appropriately adjusting the flow control 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, a throttle having a constant diameter can be used instead of the flow 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 denoted by the same reference numerals, and description thereof will be omitted. The gas-liquid pressurizing and mixing apparatus 7 of this embodiment includes:
This shows an example of an apparatus to which all the components shown in the fourth to sixth embodiments are attached. That is, an exhaust pipe 28 and a valve 30 are provided above the gas-liquid pressurizing and mixing device 7, an intermediate throttle 32 is attached in the middle of the pipe 10, and further, just before the outlet 14 where the throttle 18 is provided, A branch pipe 34 is provided. When a test of wastewater treatment with ozone was performed using this apparatus, an extremely high ozone utilization efficiency was obtained, with 99.4% of the ozone consumed relative to the injected ozone.

Next, an eighth embodiment of the present invention is shown in FIG.
Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The gas-liquid pressurizing and mixing device 8 of this embodiment
The pipe 10 is formed not in a meandering flow path but in a stepped flow path shape.

Next, a ninth embodiment of the present invention is shown in FIG. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. Gas-liquid pressurizing and mixing device 9 of this embodiment
In the figure, a throttle 18 is provided after passing through a flow path in which the pipeline 10 has only one step and has a gentle gradient.

[0022]

By using the gas-liquid pressurizing and mixing apparatus of the present invention, gas and liquid or a mixed flow thereof is simply pumped to the apparatus, thereby achieving high efficiency and continuously performing the gas-liquid reaction or gas-liquid reaction. Dissolution can be performed. In addition, even when the proportion of gas is small, gas-liquid reaction and gas dissolution can be performed with high efficiency, and especially when expensive gas is used, gas is not wasted and gas utilization efficiency is extremely good.

[Brief description of the drawings]

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

FIG. 2 is a longitudinal sectional view of the gas-liquid pressurizing and mixing apparatus of the first embodiment.

FIG. 3 is a front vertical sectional view showing a gas-liquid pressurizing and mixing apparatus according to a second embodiment of the present invention.

FIG. 4 is a front vertical sectional view showing a gas-liquid pressurizing and mixing apparatus according to a third embodiment of the present invention.

FIG. 5 is a front vertical sectional view showing a gas-liquid pressurizing and mixing apparatus according to a fourth embodiment of the present invention.

FIG. 6 is a front vertical sectional view showing a gas-liquid pressurizing and mixing apparatus according to a fifth embodiment of the present invention.

FIG. 7 is a front vertical sectional view showing a gas-liquid pressurizing and mixing apparatus according to a sixth embodiment of the present invention.

FIG. 8 is a front vertical sectional view showing a gas-liquid pressurizing and mixing apparatus according to a seventh embodiment of the present invention.

FIG. 9 is a front vertical sectional view showing a gas-liquid pressurizing and mixing apparatus according to an eighth embodiment of the present invention.

FIG. 10 is a vertical sectional view showing a gas-liquid pressurizing and mixing apparatus according to a ninth embodiment of the present invention.

[Explanation of symbols]

 1-9 Gas-liquid pressurizing and mixing apparatus 12 Inlet 13 Inflow pipe 14 Outlet 15 Outflow pipe 18 Restriction 20 Gas flow 22 Liquid flow 28 Exhaust pipe 32 Intermediate restriction 34 Branch pipe

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masakazu Kashiwa 1-10-40 Mikuni Honcho, Yodogawa-ku, Osaka-shi, Osaka Inside Izumi Electric Co., Ltd. (56) References JP-B 47-1740 (JP, B1)

Claims (3)

(57) [Claims] 1. A flow path formed in a gradient that repeats gradual increase / decrease stepwise, a throttle is provided at an outlet or downstream of the flow path, and an exhaust port for exhausting gas expanded in the flow path is provided.
A gas-liquid pressurizing and mixing device provided above the flow path that flows down stepwise. 2. An intermediate restrictor having a larger diameter than the restrictor is provided in the middle of the stepwise formed flow path, and a pressure in at least an outlet side of the intermediate restrictor in the flow path is measured. 2. A pressure measuring means is provided.
A gas-liquid pressurizing and mixing apparatus as described in the above. 3. An upwardly protruding branch flow path is provided between the stepwise flow-down flow path and the throttle, and a valve or a valve for adjusting excess air exhaust and pressurization is provided ahead of the branch flow path. 3. The gas-liquid pressurizing and mixing apparatus according to claim 1, further comprising a throttle for exhausting excess air.