JPH0810597A - Device for transferring mixed gas and liquid - Google Patents

Abstract

PURPOSE:To increase the proportion of dissolved gas and to form a fine gas-liq. mixture by positively placing the gas-liq. mixture on the mainstream of a radial impeller to widely spread it. CONSTITUTION:A shaft 2 is extended to an electric motor 1, and an outer cylinder 3 is furnished. A casing 4 is fixed to the lower end of the outer cylinder 3 to surround a lower-suction radial impeller 5 at the lower end of the shaft 2. The outer cylinder 3 is communicated with the casing 4 through a communicating port 6. A gas intake 7 and a liq. intake 8 are provided to the outer cylinder 3, and a downward suction port 4a and a radial discharge port 4b are furnished to the casing 4. An upper axial impeller 9a discharging liq. downward and a lower axial impeller 9b discharging liq. upward are fixed to the shaft 2. An upper-suction blade 11 is provided on the rear of the impeller 5, and a disk 12 is fixed to the shaft 2 above the upper axial impeller 9a with a clearance left between it and the outer cylinder 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device which is installed above and below a surface of a liquid which is in contact with a gas and which mixes and transports the gas and the liquid.

[0002]

2. Description of the Related Art The following is known as a conventional device for mixing and transferring gas and liquid, in which the center of an outer cylinder of a vertical shaft is located on the surface of the liquid in contact with the gas, and a casing is attached to the lower end of the device. A lower suction centrifugal impeller is attached to the lower end of the shaft that penetrates the cylinder and is surrounded by a casing.The outer cylinder and the casing are communicated with each other through a communication port. And a downward suction port and a radial discharge port are provided in the casing, and an upper axial flow impeller that is positioned above and discharges the fluid downward and this upper axial flow impeller One or more gas-liquid mixing devices, which are paired with a lower axial flow impeller that is positioned below and discharges fluid upward, are attached to the shaft at a position between the liquid intake port and the communication port. .

The gas and the liquid that have entered between the upper axial flow impeller that attempts to expel the fluid below the gas-liquid mixing device and the lower axial flow impeller that attempts to expel the fluid above are: It loses its place of departure and mixes violently to become a liquid containing fine bubbles. The horizontal discharge flow from the lower suction centrifugal impeller sucks the gas-liquid mixture from the communication port as a wake and diffuses it to the surroundings.

[0004]

In the above-mentioned conventional technique, the gas-liquid mixture rarely reaches the centrifugal impeller in the wake of the centrifugal impeller. Further, when a large amount of gas is taken in from the gas intake port, the bubbles of the gas-liquid mixture become large, and the gas does not dissolve much in the liquid. An object of the present invention is to positively put the gas-liquid mixture on the main flow of the centrifugal impeller and diffuse it widely to the surroundings to improve the gas dissolution rate in the liquid, and at the same time suppress the gas uptake. An object of the present invention is to provide a device for mixing and transferring a gas and a liquid capable of producing a fine gas-liquid mixture.

[0005]

In a device for mixing and transferring a gas and a liquid according to the first aspect of the invention, the center of the outer cylinder of the vertical shaft is positioned on the surface of the liquid in contact with the gas, the casing is attached to the lower end, and the outer cylinder is penetrated. A lower suction centrifugal impeller is attached to the lower end of the shaft and is surrounded by a casing. The outer cylinder and the casing are communicated with each other through a communication port, and the outer cylinder communicates with a gas and a liquid below the gas intake port. A liquid intake port is provided, a downward suction port and a radial discharge port are provided in the casing, an upper axial flow impeller that is located above and discharges fluid downward, and is located below this upper axial flow impeller. Then, one or more gas-liquid mixing devices, each of which is paired with a lower axial flow impeller for discharging the fluid upward, are attached to the shaft at a position between the liquid intake port and the communication port to mix the gas and the liquid formed. In the device for transporting the air, the upper suction is applied to the upper back surface of the lower suction centrifugal impeller. One in which the provision of the wings.

In the apparatus for mixing and transferring gas and liquid of the invention 2, the center of the outer cylinder of the vertical shaft is positioned on the surface of the liquid in contact with the gas, the casing is attached to the lower end, and the lower end of the shaft penetrating the outer cylinder is lowered. A suction centrifugal impeller is attached and surrounded by a casing.The outer cylinder and the casing are communicated with each other through a communication port.The outer cylinder is connected to a gas intake port and a liquid intake port below the gas intake port. The casing is provided with a downward suction port and a radial discharge port, an upper axial flow impeller that is located above and discharges fluid downward, and an upper axial flow impeller that is located below this upper axial flow impeller and discharges fluid upward. A device for mixing and transferring a gas and a liquid, which is formed by mounting one or more gas-liquid mixing devices, which are paired with a lower axial flow impeller for discharging, on a shaft at a position between a liquid intake port and a communication port, Above the upper axial flow impeller, between the gas intake port and the liquid intake port, And in which mounting the disc to the shaft through the gap.

[0007]

According to the first aspect of the invention, the upper suction blade on the back surface of the lower suction centrifugal impeller is widely sucked into the main flow of the centrifugal impeller by positively sucking the gas-liquid mixture from the gas-liquid mixing device. Spread it around. According to the second aspect of the present invention, the disc forms a restriction with the outer cylinder through a gap to suppress the intake of gas and generate a finer gas-liquid mixture.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view of the essential part of an embodiment. First, a portion similar to the conventional example will be described. In the figure, a shaft 2 is extended to the lower end of a vertical shaft electric motor 1 having a mounting flange 1a, and an outer cylinder 3 is attached. The center of the outer cylinder 3 is positioned on the surface of the liquid L in contact with the gas G, and the casing 4 is attached to the lower end. A lower suction centrifugal impeller 5 is attached to the lower end of a shaft 2 that penetrates the outer cylinder 3 and is surrounded by a casing 4. The outer cylinder 3 and the casing 4 are communicated with each other through a communication port 6. A gas inlet 7 that communicates with the outer cylinder 3 and a liquid inlet 8 that communicates with the liquid below the outer casing 3.
And the casing 4 is provided with a downward suction port 4a and a radial discharge port 4b. A gas-liquid mixing device including a pair of an upper axial flow impeller 9a located above and discharging fluid downward and a lower axial flow impeller 9b located below the upper axial flow impeller 9a and discharging fluid upward. It is formed by attaching one or more of 9 to the shaft 2 at a position between the liquid intake port 8 and the communication port 6.

As a feature of the embodiment, an upper suction blade 11 is provided on the upper back surface of the lower suction centrifugal impeller 5. Also,
A disk 12 may be attached to the shaft 2 above the upper axial flow impeller 9a and between the gas intake port 7 and the liquid intake port 8 with a gap between the outer cylinder 3 and the liquid intake port 8. According to this structure, the upper suction blade 11 on the back surface of the lower suction centrifugal impeller 5 positively places the gas-liquid mixture from the gas-liquid mixing device 9 on the mainstream of the centrifugal impeller 5. Spread widely around. Further, the disk 12 forms a throttle with the outer cylinder 3 via a gap to suppress the intake of gas and generate a finer gas-liquid mixture.

[0010]

According to the apparatus for mixing and transferring a gas and a liquid according to the first aspect of the invention, the blades on the back surface of the centrifugal impeller are configured to positively suck the gas-liquid mixture from the gas-liquid mixing device and to the centrifugal impeller. It has the effect of spreading on the mainstream and widely spreading around. According to the apparatus for mixing and transferring the gas and the liquid according to the second aspect of the invention, the disk having the throttling action has an effect of suppressing the intake of the gas and generating a finer gas-liquid mixture.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an embodiment.

[Explanation of symbols]

1 Vertical shaft motor 1a Flange 2 Shaft 3 Outer cylinder 4 Casing 4a Discharge port 4b Suction port 5 Centrifugal impeller 6 Communication port 7 Gas intake port 8 Liquid intake port 9a Upper axial flow impeller 9b Lower axial flow impeller 9 Air Liquid mixing device 11 Blade 12 Disc G Gas L Liquid

Claims (2)

[Claims] 1. A vertical shaft impeller is attached to the lower end of a shaft that penetrates the outer cylinder with the center of the outer cylinder of the vertical shaft positioned on the surface of the liquid in contact with gas. , The outer cylinder and the casing are communicated with each other through a communication port, the outer cylinder is provided with a gas intake port communicating with the gas and a liquid intake port communicating therewith with a liquid thereunder, and the casing is provided with a downward suction port and a radial direction. A gas consisting of a pair of an upper axial flow impeller, which is provided with a discharge port and is positioned above and discharges fluid downward, and a lower axial flow impeller, which is positioned below the upper axial flow impeller and discharges upward fluid. A device for mixing and transferring a gas and a liquid formed by mounting one or more liquid mixing devices on a shaft at a position between a liquid intake port and a communication port, wherein an upper back surface of the lower suction centrifugal impeller is provided. Mixing and transferring gas and liquid characterized by providing upper suction blades Location. 2. A vertical shaft impeller is attached to the lower end of the vertical shaft with the center of the outer cylinder positioned on the surface of the liquid in contact with the gas, and a lower suction centrifugal impeller is attached to the lower end of the shaft penetrating the outer cylinder and surrounded by the casing. , The outer cylinder and the casing are communicated with each other through a communication port, the outer cylinder is provided with a gas intake port communicating with the gas and a liquid intake port communicating therewith with a liquid thereunder, and the casing is provided with a downward suction port and a radial direction. A gas consisting of a pair of an upper axial flow impeller, which is provided with a discharge port and is positioned above and discharges fluid downward, and a lower axial flow impeller, which is positioned below the upper axial flow impeller and discharges upward fluid. A device for mixing and transferring a gas and a liquid formed by mounting one or more liquid mixing devices on a shaft at a position between a liquid intake port and a communication port, wherein the gas intake is performed above the upper axial flow impeller. A special feature is that a disc is attached to the shaft with a gap between the mouth and the liquid intake port and the outer cylinder. Mixing device for transferring the gas and liquid to.