JPS5839840Y2 - Aeration device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an aeration device mainly used in aquaculture ponds and in treating wastewater containing organic matter.

In aquaculture ponds, blowing air and stirring are often used to provide oxygen in the air to cultivated fish, and in sewage treatment facilities to decompose organic matter.

Various aeration devices have been proposed in the past, but conventional devices have problems in terms of noise, maintenance, etc., and at the same time, the amount of air mixed in is small, and the air bubbles are not subdivided sufficiently. The disadvantage was that the mixing effect was low.

Conventional aeration devices also have the disadvantage that the liquid energy provided by the pump is not fully utilized.

The present invention was developed in view of the various shortcomings of the conventional aeration equipment described above, and its purpose is to provide an aeration equipment that allows a large amount of air to be mixed in and sufficiently breaks up air bubbles. A further object is to provide an aeration device in which the energy imparted to the liquid to be treated by the pump is fully utilized, and to provide an aeration device that produces less noise.

In order to achieve the above objects, the aeration device according to the present invention processes the liquid energized by the pump through a first stage air suction device and a second air suction device consisting of an ejector device. The liquid is sprayed in a direction substantially perpendicular to the liquid surface.

The liquid referred to herein is water when the present aeration device is applied to an aquaculture pond, or water when the present aeration device is applied to a sewage treatment facility.
It refers to treated water containing organic matter, or liquid containing chemical substances when applied to a chemical reaction device.

Since the aeration system according to the present invention is constructed as generally described above, that is, the air suction system is installed in the atmosphere, maintenance and inspection are easy.

In addition, since the liquid with air mixed in is injected in a direction approximately perpendicular to the surface of the liquid to be treated, the falling energy due to gravity of the liquid is effectively used, and the amount of air sucked and the stirring force of the liquid to be treated are reduced compared to conventional methods. It's bigger than anything.

Further, according to the present invention, since the air suction device is provided in two stages, the number of air bubbles is large and the air bubbles are sufficiently divided.

Other features of the construction, operation, and effects of the aeration device according to the present invention will become clear from the following description with reference to the accompanying drawings.

Now, FIG. 1 shows a first embodiment of the aeration apparatus according to the present invention, and by referring to the same figure, it can be understood that the pump 1 is installed underwater as a submersible pump.

Although not limited to this, if the pump is installed underwater in this way, a noise prevention effect can be expected.

Furthermore, when the pump is installed in a liquid, the pump 1 can be removably pulled up to the upper position A along the guide means 20 or lowered, and when it is moved up and down in this way, It is desirable that the discharge port 2' of the pump 1 and the end of the discharge pipe 2 be automatically connected or separated.

A pipe 3 is connected to the discharge pipe 2 of the pump 1 installed at the bottom B of the tank V, and this pipe rises above the liquid level S, and then extends slightly in the horizontal direction to reach the liquid level S.
It faces in the direction of , and is connected to the first stage air suction device E and the second stage air suction device E, each of which includes an ejector device.

These air suction devices are connected in a straight line, and the ejection port of the second stage air suction device E faces into the liquid W to be treated.

The first stage air suction device includes a nozzle 5 from which the liquid pumped from the pump 1 is also ejected, an air chamber 6 provided so as to surround this nozzle, and an air intake port opening into this air chamber. A throat portion 7 , which is constructed from 8 and constitutes a part of the first stage air suction device, is connected to the air chamber 6 .

A muffling device (not shown) is attached to the air intake port 8, and the throat portion 7 is preferably constructed such that the pipe diameter gradually decreases as it goes downward.

In the embodiment shown in FIG. 1, the second stage air suction device connected to the throat portion 7 of the first stage air suction device is composed of an ejector device.

That is, like the first stage air suction device, the nozzle 10,
Air chamber 11. An air intake port 8 with a silencer and a throat section 12 are connected to each other, and a stiff user 13 is attached to the throat section.

The tip of this diffuser 13, that is, the spout 14
faces into the liquid W.

The aeration device according to the present invention is configured as described above, so that when the pump 1 is energized, the liquid to be treated W
A portion of the liquid is guided to above the liquid level 8 by the discharge pipe 2 and piping 3, and is then injected in a direction approximately perpendicular to the liquid level S via the first and second stage air suction devices facing downward. .

When the liquid is ejected from the nozzle 6, air is sucked through the air intake 8 and mixed with the liquid.

The mixed liquid is then accelerated by the throat portion 7 and guided to the second stage air suction device E.

Since the nozzle 10 of this second-stage air suction device E is located above the wavefront S during startup, air suction and mixing are performed here as well.

The pressure is restored in the diffuser 13, compressing the air and turning it into fine bubbles.

Then, it is injected into the liquid in a direction substantially perpendicular to the liquid surface.

The liquid is therefore swirled as shown.

As described above, according to the present invention, since the first and second stage air suction devices are installed in the vertical direction, the falling energy of the liquid is effectively used, and a large amount of suction air is processed at the same time. The liquid is agitated downward and further agitated significantly by the upward force of the fluid.

Furthermore, since the second stage air suction device is provided with a tiff user, the air bubbles can be made finer.

Further, if the ejection port of the second stage air suction device is opened into the liquid, the noise will be significantly reduced.

Now, FIG. 2 shows another embodiment of the present invention,
As is clear from the figure, this embodiment is different from the first embodiment in the installation position of the pump and the configuration of the second stage air suction device.

Therefore, the same components as those of the first embodiment are given the same reference numerals, and redundant explanation will be omitted.

Since the pump 30 is installed outside the tank V, the liquid into which air is mixed is passed through the strainer 31. It is designed to be sucked in through a suction tube 32.

However, as will be easily understood by those skilled in the art, it is clear that the present pump 30 can also be installed in the liquid W as a submersible pump.

The second stage air suction device E' is composed of a tie user 33 connected to the throat portion 7, an outer cylindrical body 34 surrounding the tie user, and an air intake port 8. There is.

The outer cylindrical body 34 extends below the tip 35 of the diffuser 33, and a spout 36 at the tip faces into the liquid W to be treated.

According to this embodiment, since the second-stage air suction device does not have an ejector device, the amount of air sucked is somewhat smaller than that shown in the first embodiment, and although it is inferior in terms of subdividing the bubbles, the noise reduction The effect is fully achieved.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a first embodiment of the present invention, and FIG. 2 is a schematic diagram showing a second embodiment. 1.30...Pump, 5,10...Nozzle, 6,11...Air chamber, 7,12...Throat part, 8... Air intake, 13°33...
...Diffuser, 14.36...Blowout port, 34...Outer cylinder body, D...First stage air suction device consisting of ejector device, E, E'・・・・・・
-Second stage air suction device.

Claims (4)

[Scope of utility model registration request] (1) The liquid discharged by the pump is guided above the liquid level by piping, and the liquid guided by the piping is sent to the first stage air suction device consisting of an ejector device and the throat part of this air suction device. An aeration device characterized in that the air is injected substantially perpendicularly to the liquid surface via a second air suction device connected thereto. (2) a nozzle in which the second-stage air suction device ejects a liquid into which air has been suctioned and mixed by the first-stage air suction device;
an air chamber formed to surround this nozzle;
Claim 1 of the utility model registration claim comprises an air intake port communicating with the air chamber, a throat portion connected to the air chamber, and a diffuser connected to the throat portion. aeration equipment. (3) The second-stage air suction device includes a deep user connected to the throat portion of the first-stage air suction device, an outer cylindrical body provided so as to surround the diffuser, and an outer cylindrical body provided to surround the diffuser. and an air intake port provided therein. (4) The aeration device according to any one of claims 1 to 3 of the utility model registration claim, wherein the injection port of the second suction device faces into the liquid.