JP3330237B2 - Diffuser - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diffuser for aeration for improving water quality of dams, reservoirs, lakes and the like.

[0002]

2. Description of the Related Art In general, in a reservoir or the like, the amount of dissolved oxygen in water, especially in a bottom tank water, is insufficient due to inflow and accumulation of organic substances and the generation of methane gas. Since the water content is lower than that, the convection phenomenon of the surface water and the bottom water does not occur. Therefore, there is a problem that the bottom water becomes dead water, and when it is discharged downstream, a bad smell is generated.

[0003] Conventionally, in order to solve the above-mentioned problems, an air diffuser has been used in order to increase the amount of dissolved oxygen by supplying air into bottom water to activate the water. An example of the air diffuser is disclosed in Japanese Utility Model Publication No. 58-43997. This air diffuser supplies compressed air from a compressor provided on land or on the water to the lower part of the device main body submerged to a required depth in water, and aerated by blowing compressed air into water in the device main body from an air diffuser. The jet air, that is, exhaust gas, is collected in an air chamber formed in the upper portion of the apparatus main body, and the exhaust gas is exhausted to the atmosphere by an exhaust pipe connected to the air chamber.

[0004]

In the above-mentioned prior art, the amount of oxygen dissolved in water by the ejection of compressed air, that is, diffused air, is about 6.5% of the oxygen content of air, and most of the oxygen is excess air. Released into the atmosphere as. Therefore, at present, only 6.5% of the total energy required to compress air by the air compressor is used. The present invention has been made in view of the above situation, and an object of the present invention is to provide an air diffusing device capable of improving the air diffusing efficiency by effectively utilizing the oxygen and pressure energy of surplus air. To offer.

[0005]

According to the present invention, the following technical measures have been taken in order to achieve the above object. In other words, the present invention supplies compressed air from a first air compressor provided on land or water to a diffuser main body submerged at a required depth in water, and blows the compressed air into the water by a diffuser. A second air compressor for re-pressurizing, wherein an air chamber is provided in the main body of the diffuser to collect jetted pressure air, and the pressure air in the air chamber is separately provided. And the compressed air is supplied to the air diffuser.

Further, the present invention is characterized in that the second air compressor for re-pressurization is provided on land, on water or under water, and further on a barge on which the first air compressor is mounted. In addition, power generation equipment utilizing natural energy such as solar power generation equipment or wind power generation equipment is mounted.

[0007]

According to the present invention, the compressed air pressurized by the first air compressor is jetted into the water by the first air diffuser,
Aerate water and collect in air chamber. Excess air collected in the air chamber is guided to a second air compressor for re-pressurization, is again pressurized to a required pressure, is supplied to a second air diffuser, and is jetted into water to perform aeration.

Therefore, the first air compressor can have a high compression force and a small capacity, and the second air compressor for re-pressurization can have a low compression force and a large capacity, and energy can be saved.
Cost can be reduced. In addition, by providing a power generation facility using natural energy, energy saving can be achieved and economy can be improved.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention.
It consists of a floating facility 3 floating on the surface of the reservoir 2 and an underwater facility 4 submerged at a required depth in the water.
Is moored to the water bottom 2A by anchors 5, 6 and anchor cables 7, 8.

[0010] The water facility 3 has a float 9.
Barge 10 and first air compressor 1 mounted on barge 10
1 and a second air compressor 12 for repressurization. In addition, the underwater facility 4 includes a covered cylindrical diffuser main body 13.
An air-water mixing cylinder (or a pumping cylinder) 14 provided concentrically in the main body 13, and first and second air diffusion plates 15, which are air diffusion means.
An air chamber 17 is formed at the upper end of the main body 13, and a drain pipe 18 is provided around the lower end of the main body 13.

The first air diffuser 15 has a first air compressor 1
The first air supply pipe 19 connected to the outlet of the first air compressor 19 is connected to the first air supply pipe 19, and the second air supply pipe 20 connected to the outlet of the second air compressor 12 is connected to the second air diffuser plate 16. An air circulation pipe 22 is connected to an intake port of the second air compressor 12 via a valve 21, and the other end of the circulation pipe 22 is connected to the air chamber 17 in a communicating manner. In the middle of the air circulation pipe 22,
An exhaust valve 23 is connected above the barge 10.

The second air compressor 12 has a low compression force and a large capacity because the intake air has the same pressure as the pressure in the air chamber 17 and the difference in water level is H1-H2. Smaller energy is required than when air is supplied by compressing the air above water. Further, the first air compressor 11
Should have a high compression force and small capacity.
It can be obtained more economically than a large capacity compressor.

In the above embodiment, the first air compressor 11
The compressed air supplied to the first diffuser plate 15 from the first diffuser plate 15 through the first air supply pipe 19 blows out from the first diffuser plate 15 and
4 rises along with pond water, is collected in the air chamber 17 above the apparatus main body 13, rises with the air and is aerated. Tube 1
8 and released into the pond water, the activated water is mixed into the low-rise pond water, and the water quality is improved.

The surplus air collected in the air chamber 17 is
The air is supplied to the second air compressor 12 through the air circulation pipe 22,
The air is re-pressurized and is ejected from the second water spray plate 16 into the air-water mixing cylinder 14 through the second air supply pipe 20, whereby the air is diffused. In this way, the excess pressure energy and oxygen after underwater aeration of the compressed air pressurized by the first air compressor 11 can be circulated and reused, and the energy can be effectively used.
The air collected in the air chamber 17 is discharged to the atmosphere by opening the exhaust valve 23 as needed.

FIG. 2 shows a main part of a second embodiment of the present invention.
The difference from the first embodiment is that the second air compressor 12 is disposed in the underwater facility 4 as an underwater installation type, and the same operation and effect as the first embodiment can be expected. Therefore, the same reference numerals are given as in FIG. 1 and the detailed description is omitted. In the second embodiment, the first air compressor 11 can be installed on land, and in this case, water facilities can be omitted. Also, in the first embodiment, the first and second
The air compressors 11 and 12 can be installed on land.

FIG. 3 shows a third embodiment of the present invention. The difference from the first embodiment is that a solar power generation facility, ie, a solar cell 24, which is a natural energy,
The point is that an inverter 25 and a battery 26 are provided. According to the third embodiment, the onshore facility and the underwater electric wire or the piping work are not required, and the operation cost can be reduced as well as the installation cost.

In the third embodiment as well, commercial power supply equipment capable of supplying commercial power from the land and enabling hybridization can be provided on the barge 10 of the water equipment or on the land. The present invention is not limited to the above embodiment. For example, by appropriately changing the hole diameter of the diffuser plates 15 and 16, one can be used for an air lift and the other can be used for aeration (aeration). The design can be changed as appropriate.

[0018]

According to the present invention, as described above, the air chamber is provided in the main body of the air diffuser provided in the water to collect the pressure air jetted into the water, and the pressure air in the air chamber is provided separately. Since it is characterized in that it is compressed again by the second air compressor for re-pressurization and supplied to the air diffuser, the pressure energy and oxygen of excess air collected in the air chamber are effectively used. To improve the air diffusion efficiency,
Also, the first compressor can be obtained at a low cost because it requires only a high compression force and a small capacity, and the second compressor can be obtained at a low cost because it can have a low compression force and a large capacity. It is possible to reduce costs.

Further, the present invention provides a terrestrial facility, underwater wiring, Piping work is not required, and construction costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a main part of a second embodiment of the present invention.

FIG. 3 is a perspective view showing a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air diffuser 2 Reservoir 3 Water equipment 4 Underwater equipment 10 Barge 11 1st air compressor 12 2nd air compressor 13 Device body 15 1st diffuser plate 16 2nd diffuser plate 17 Air chamber 19, 20 Air supply pipe 22 Air circulation pipe

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) C02F 7/00 C02F 3/22 B01F 3/04

Claims (3)

(57) [Claims] A pressure air is supplied from a first air compressor provided on land or on water to a diffuser main body submerged at a required depth in water, and the compressed air is blown into the water by a diffuser. An air diffuser, wherein an air chamber is provided in the air diffuser main body so as to collect pressure air ejected into water,
The air diffuser, wherein the compressed air in the air chamber is compressed again by a separately provided second air compressor for re-pressurization and supplied to the air diffuser. 2. The air diffuser according to claim 1, wherein the second air compressor for re-pressurizing is provided on land, on water, or under water. 3. The power plant utilizing natural energy such as a photovoltaic power plant or a wind power plant is mounted on a barge on which the first air compressor is mounted. Diffuser.