JPS6234436B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas-liquid mixing device, and more particularly to an aeration device that mixes gas with a liquid to generate fine air bubbles.

Conventionally, this type of device uses a submersible pump to eject liquid and forcefully inserts gas sent through a vent hole to generate microscopic bubbles in the liquid, but in deep water, a huge amount of air bubbles are generated. Since it requires power, it can only be used in shallow liquids of less than 2 m depth, which has the disadvantage that its applications are extremely limited.

As a device to solve the above-mentioned drawbacks of the conventional device, as shown in Fig. 1, a radial partition plate is attached to the lower part of the ventilation pipe A, and the liquid taken in from the liquid intake port C is radiated into the liquid tank. A device has been proposed in which the air ejected from the gas outlet D is sucked by the flow (see Utility Model Publication No. 52-6955). However, although this device certainly functions effectively even in liquids at a depth of 2 meters or more, it is not suitable for large-scale aeration, and both the liquid and gas outlets are narrow and have a complicated configuration, so it does not remove lint. Other debris can easily cause clogging, which can overload the drive motor and shorten its lifespan.However, once debris is entangled, it is difficult to remove.
It has the disadvantage that it cannot be recycled.

The present inventor has solved the drawbacks of these conventional aeration devices,
As a result of intensive research in an effort to obtain a device that is highly versatile and easy to handle, the inventors came up with the idea of utilizing the negative pressure generated by overflow of liquid, and thus completed the present invention.

The content of the present invention will be explained below with reference to FIGS. 2 to 5 showing examples.

That is, the present invention provides a ventilation pipe 1 having a gas intake port 1b in the upper part and a plurality of gas jet ports 1d in the lower side part 1c, and a lower side part 1c of the ventilation pipe 1 along the ventilation pipe 1. This is a gas-liquid mixing device comprising an impeller 2 fixed to the air and a blind plate 3 that closes the opening at the lower end of the ventilation pipe 1.

In the device of the present invention, the diameter and length of the ventilation pipe 1 are arbitrary and may be determined as appropriate as necessary. Also, a gas intake port 1b bored in the ventilation pipe 1
The diameter of the hole is not particularly limited, as long as it has a sufficient area for passage, and the number of holes to be drilled is not limited to one.
This gas inlet is provided above the ventilation pipe 1, but since the end 1e of the pipe 1 is used for connection with the rotating mechanism, and in order to prevent liquid from entering through the gas inlet, the upper side 1b is It is preferable to provide the

The gas jet ports 1d formed in the lower side portion 1c of the ventilation pipe 1 are made to have a smaller diameter than the gas intake ports 1b, and preferably as many as possible.

The impeller 2 has a length equal to or longer than the drilling distance of the gas outlet 1d, and is fixed to the lower side 1c of the ventilation pipe 1 by appropriate means, and the number of impellers is one or more and can be arbitrarily determined. However, the most stable results are obtained when 4 to 8 sheets are attached radially. In addition, when a plurality of impellers 2 are used, it is preferable to arrange a reinforcing plate 2a at the upper end portions of the impellers 2. Further, the width of the impeller 2 may be arbitrarily determined and is not particularly limited.

The opening at the lower end of the ventilation pipe 1 must be closed. The blind plate 3 that closes this can be simply fixed by fitting, gluing, or other fixing means with a size that matches the diameter of the lower end opening, but it is preferable that the blind plate 3 has a size that matches the width of the impeller 2. The lower end of the impeller 2 is fixed to serve as reinforcement for the impeller 2 (see FIGS. 2 and 4).

Note that materials used in the device of the present invention include metals, plastics, ceramics, and the like.

The device of the present invention is used by connecting the top of the ventilation pipe 1 to a rotating mechanism (not shown). The rotation mechanism rotated the ventilation pipe 1, which caused the impeller 2 to rotate in the liquid, creating a vortex, creating negative pressure in the liquid on the back side in the direction of rotation of the impeller, and causing gas to flow in from the gas intake port 1b. Gas is ejected from the gas ejection port 1d and mixed into the vortex. The mixed gas generates extremely fine air particles in the liquid due to the vortex and the shearing force of the impeller 2.

The device of the present invention converts liquid into gas (air, oxygen, etc.) in septic tanks, sewage treatment tanks, fish culture tanks, plant culture tanks, etc.
It can be used for processing.

The device of the present invention has the following technical effects.

(1) Gas is introduced into the liquid by a self-priming method, and a large amount of gas can be generated in the form of microscopic bubbles in a large amount of liquid.

(2) The structure utilizes the negative pressure generated on the back side of the impeller in the direction of rotation, so it is possible to generate strong vacuum pressure in the liquid and draw gas into the liquid with a small amount of energy. Therefore, you can easily reach your goal even in places where the water depth is 2 meters or more.

(3) Since a large amount of gas can be ejected at once, a strong upward flow is generated, causing a convection phenomenon in the surrounding liquid, and air can be uniformly supplied throughout the aquarium.

(4) Since the gas is made into extremely fine particles and mixed into the liquid, the dissolution efficiency of oxygen, for example, can be increased.

(5) Unlike conventional aeration equipment, the structure does not generate flow energy in the liquid, so energy consumption can be significantly reduced.

(6) Since the device does not have a structure in which liquid flows into the device and is injected, there is no clogging with debris, which prevents overload of the drive motor and extends the life of the motor. Furthermore, even if waste gets entangled in the device, it can be removed immediately, allowing for long-term reuse.

(7) It has an extremely simple structure, can be easily disassembled and assembled, and is oil-free, making it extremely easy to handle.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing the main parts of a conventional gas-liquid mixing device, FIG. 2 is a partially cutaway perspective view showing an embodiment of the gas-liquid mixing device of the present invention, and FIGS. 3 to 5 are the same. FIG. 7 is a partially cutaway perspective view showing another embodiment. Symbols in the figure: 1...Vent pipe; 1b...Gas intake port; 1d...Gas outlet; 2...Impeller; 2a...
Reinforcement plate; 3...Blind plate.

Claims (1)

[Claims] 1. A ventilation pipe having a gas intake port on the upper side and a plurality of gas ejection holes on the lower side, an impeller fixed to the lower side of the ventilation pipe along the ventilation pipe, and an opening at the lower end of the ventilation pipe. 1. A gas-liquid mixing device comprising: a blind plate that closes a portion of the gas-liquid mixing device.