JPH0788499A - Aerator by diffused air - Google Patents

Abstract

PURPOSE:To improve aeration efficiency and to keep up with the Variation of water level by a method in which a steam riser equipped with a float is moored in the water of a dam reservoir etc., at a depth which is optional and changeable, an air diffusion chamber with its roof having lots of air diffusion holes is installed in the middle of the lower end of the steam riser, and a water inlet is formed between the air diffusion chamber and the lower end of the steam riser. CONSTITUTION:A steam riser 3 equipped with a ring-shaped float 4 is moored in the water of a reservoir 2 at an optional depth. The steam riser 3 is moved vertically by winding and unwinding a wire rope 8 to change the depth. An air diffusion chamber 6 is installed in the middle of the lower end of the steam riser 3, and lots of air diffusion holes 10 are formed in its roof. A water inlet equipped with a screen 13 is formed between the lower end of the steam riser 3 and the air diffusion chamber 6. A hose 7 held by a mooring wire rope 8 is connected to the bottom 6 B of the air diffusion chamber 6, and air is supplied to the air diffusion chamber 6 to be blown off from air diffusion holes. In this way, water of the reservoir 2 is sucked from the water inlet 12 to be aerated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aeration type aeration device for improving the water quality of dam reservoirs, lakes, reservoirs, rivers and the like.

[0002]

2. Description of the Related Art Generally, a diffusing pipe type aeration device is installed to limit light and nutrients to undesired algae inhabiting water, especially surface layers in dam reservoirs and reservoirs, and to improve water quality. .

Conventionally, as this type of aeration device, a steam / water rising pipe is moored in the water of a reservoir at a predetermined depth below the water surface, and a large number of air blowing holes are provided at the lower end center of the rising pipe. The ring-shaped air diffusing pipe is provided, compressed air is supplied to the air diffusing pipe from the land, and the air blown out from the air blowing holes is raised in the rising pipe, so that pond water is supplied from the lower end of the water / water rising pipe. It is known that suction is performed and the air is raised in association with air to generate a vertical circulating flow in the pond water to form a clear and high-temperature circulating mixed layer on the surface layer of the reservoir.

[0004]

By the way, in the above-mentioned prior art, since the air diffuser is ring-shaped and has only one pipe, the aeration efficiency is poor, and furthermore, since the air diffuser is moored and fixed at a predetermined depth below the surface of the water, fluctuations in water level occur. There was a problem that I could not follow.
The present invention has been made by paying attention to the above situation, and an object of the present invention is to provide an aeration type aeration apparatus having high aeration efficiency and capable of following a water level fluctuation.

In the present invention, the following technical means are provided to achieve the above object. That is, the present invention relates to a dam reservoir,
An air / water rising pipe equipped with a floating body in water such as a lake, a pond, or a river is moored to an arbitrary depth below the water surface so that the depth can be changed. An air diffuser is provided, and a water suction port is formed between the air diffuser and the lower end of the water / water rising pipe. Further, the present invention is characterized in that the hose for supplying air to the air diffusing chamber is a steel band armored hose in which a mooring wire rope is arranged around the hose to be integrated.

[0006]

According to the present invention, the pressure of the air blown out from the diffuser holes provided on the upper surface of the diffuser chamber is uniform, sufficient mixing with the entrained pond water is carried out, and the aeration efficiency is increased. In addition, since the subsurface depth of the steam rising pipe can be changed arbitrarily, it is possible to follow the temperature or water level of the surface water, form an efficient circulating flow mixing layer, and improve aeration efficiency. it can.

Further, since the air supply hose and the mooring wire rope are integrated, the wire rope winder can wind and unwind the hose at the same time, and the hose winder can be omitted. It is easy to change installation water depth such as following the water level and can be done efficiently.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, (1) is an aeration apparatus according to the present invention, which is moored at an arbitrary depth in the water of a reservoir (2) and is provided on the water / water rising pipe (3) and on the outer periphery of the upper end of the pipe (3). A ring-shaped floating body (4), an air diffusing chamber (6) connected to the pipe (3) by a plurality of connecting members (5) located at the center of the lower end of the water / water rising pipe (3), and It consists of an air supply hose (7) and a mooring wire rope (8) connected to the lower surface of the air diffuser (6), a mooring anchor (9), and an air compressor and winder (not shown). .

The steam / water rising pipe (3) is a straight pipe having a diameter of about 0.5 m and a length of 5 to 10 m, for example, and the lower end thereof is expanded radially outward to facilitate the intake of pond water. . The air diffusing chamber (6) has a hollow disk shape, and the top plate (6)
A) is a spherical surface having an upward projecting shape, the top plate (6A) is provided with a large number of air diffusion holes (10) on the entire surface, and the hose (7) is connected to the center of the bottom plate (6B) so as to communicate with each other. At the same time, one end of the mooring wire rope (8) is connected.

The hose (7) is, as shown in FIG.
A plurality of mooring wire ropes (8) are arranged on the outer peripheral surface of the mooring wire rope (8) to be integrated into a steel strip armored hose. Therefore, the hose (7) together with the wire rope (8)
It is simultaneously or integrally wound or rewound by a winder installed on land.

The mooring anchor (9) is provided with a pulley (11) for rotatably hooking a wire rope (8) and the like, and the mooring position can be arbitrarily changed to facilitate the depth of water below the water surface of the steam rising pipe (3). Can be changed to. A water inlet (12) is formed between the inner peripheral surface of the lower end of the air / water rising pipe (3) and the air diffuser (6), and is required below the water inlet (12). A screen (13) can be provided accordingly.

According to the above embodiment, since the top plate (6A) of the air diffusing chamber (6) is provided with a large number of air diffusing holes (10) on its entire surface, a large number of air is efficiently blown out. At the same time, the pressure of the air blown out from each diffuser hole (10) becomes uniform, and the water in the riser pipe (3) entrained is uniformly contacted with the air, and aeration is efficiently performed. You can Then, the steam / water riser pipe (3) is moved up and down by winding or unwinding the wire rope (8) in accordance with the temperature of the surface water, the water level, etc., and the water depth below the water surface is arbitrarily changed to be efficient. A circulating flow mixing layer can be formed.

The present invention is not limited to the above embodiment, and for example, the floating body (4) may have a plurality of rice-bowl-shaped floats attached instead of the ring-shaped float.

[0014]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, an air / water rising pipe provided with a floating body is placed in water of a dam reservoir or the like at an arbitrary depth below the water surface.
An air diffusing chamber with a large number of air diffusing holes is provided on the top plate at the center of the lower end of the water / water rising pipe, and a water intake port is formed between the diffusing chamber and the lower end of the water / water rising pipe. Since it is characterized by being, it is possible to increase the amount of air blown into the water and equalize the pressure of the air blown out from each diffuser hole, it is possible to diffuse uniformly in the water-water rise pipe, Aeration efficiency can be improved.

Then, the water depth below the water surface of the steam rising pipe can be arbitrarily changed to form an efficient circulating flow mixing layer to improve the water quality. Further, the present invention is characterized in that the air supply hose and the mooring wire rope are integrated, so that the hose and the wire rope can be wound or unwound at the same time by the wire rope winder, which reduces equipment costs. Reduction and simplification of maintenance management and improvement of operability for raising and lowering the water / water riser pipe can be achieved.

[Brief description of drawings]

FIG. 1 is a central longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a hose in the same example.

[Explanation of symbols]

 1 Air diffuser aeration device 2 Reservoir 3 Air rising pipe 4 Floating body 6 Air diffuser 6A Top plate 7 Hose 8 Mooring wire rope 10 Air diffuser 12 Water intake

Claims (2)

[Claims] 1. A steam water rising pipe provided with a floating body is moored in water of a dam reservoir, lake, pond, river, etc. so that the depth can be changed to an arbitrary depth below the water surface, and the center of the lower end of the steam rising pipe is controlled. An aeration type aerating device, characterized in that a top plate is provided with an air diffuser having a large number of air diffusers, and a water suction port is formed between the air diffuser and the lower end of the water / water rising pipe. 2. A hose for supplying air to the air diffusing chamber,
The air diffuser type aeration device according to claim 1, wherein the hose is a steel band armored hose that has a mooring wire rope arranged on the outer periphery thereof.