JP2000354889A - Aeration device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] An aeration apparatus that performs efficient aeration without using motive power by utilizing the radially scattered hydraulic power before jet water scatters and falls on the water surface. To provide. SOLUTION: By switching the rotation direction of a vertical axis having a stirring blade near a free surface, suction of sewage is caused to be jetted and scattered in a radial direction from the surface of the water to be brought into contact with air, and air to the water due to water falling on the surface of water is removed. In an aeration apparatus that selectively performs an aeration action by feeding and a stirring action of sewage that only agitates water without sending air into water, an aerator 1 installed on a float 10 and an outer periphery of the float 10 The water turbine 5 is provided in the section, and is configured to rotate under the pressure of the jet water from the aerator 1 to perform aeration of sewage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aeration apparatus, and more particularly to an aeration apparatus capable of performing low-power aeration for dissolving oxygen in water in order to prevent anaerobic decay of organic wastewater such as sewage.

[0002]

2. Description of the Related Art Conventionally, in order to prevent anaerobic decay of organic wastewater such as sewage for sewage treatment, an aerator is provided near the surface of an aeration tank, and a fountain is scattered around and dropped on the water surface. Aeration was performed by sending air into the water.

[0003]

However, in the conventional aeration apparatus, the aeration device provided near the surface of the aeration tank scatters sewage near the water surface to the surroundings. The speed of sending air into the treated water is small for the power consumed,
There was a problem that aeration efficiency was low.

[0004] The present invention solves the above-mentioned problems of the conventional aeration apparatus, and before the jet water scatters and falls on the water surface,
It is an object of the present invention to provide an aeration apparatus that performs efficient aeration without using motive power by utilizing the radially scattered hydraulic power.

[0005]

In order to achieve the above object, an aeration apparatus according to the present invention sucks sewage by switching the direction of rotation of a vertical axis having a stirring blade near a free surface and jets sewage radially from above the water surface. Aerating action by sending air into water due to splashing and contact with air and falling on the water surface, and selectively performing agitating action of sewage that only agitates water without sending air into the water Aeration device installed on the float,
The water turbine is provided on the outer periphery of the float and rotates under the pressure of the jet water from the aerator to perform aeration of sewage.

[0006] The aeration apparatus of the present invention having the above-described structure includes:
The rotating body is rotated by using the fountain force scattered to the outer periphery by the operation of the aerator, and the sewage surface is agitated. The stirring and aeration of the surface can be performed by rotating the water wheel,
Aeration can be performed efficiently.

In this case, a plurality of water turbines are arranged at predetermined intervals along the outer periphery of the float, the turbine is rotatably supported on a horizontal axis, and a blade member for aeration is attached to the outer periphery. be able to.

[0008] With this, the plurality of waterwheels arranged around the float can be rotated by using the fountain force during scattering, so that the stirred sewage can be moved from the center of the aeration tank to the outer periphery. Since the aeration can be performed uniformly in the aeration tank and the water wheel is attached to the horizontal axis, the water wheel can be easily subjected to the fountain force during scattering, and the water wheel can be rotated efficiently.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the aeration apparatus of the present invention will be described below with reference to the drawings. FIG. 1 shows a typical rectangular aeration tank as an aeration tank for sewage treatment to which the present invention can be applied.

FIG. 1A shows a typical rectangular aeration tank for sewage treatment to which the present invention can be applied.

The aeration tank A is provided with an aeration apparatus B having a capacity corresponding to the amount of sewage flowing into the aeration tank. The aeration device B is provided with an aerator 1 on a float 10 so as to float on the water surface of an aeration tank A, and a stirring blade for stirring sewage at a tip of a vertical shaft 2 which is driven to rotate by reversible rotation by a motor 4. 3 is attached. The agitating blades 3 agitate the sewage by rotation, and at the same time, scatter water radially to perform aeration.

The float 10 is constructed so that it can float and sink with adjustable buoyancy. A plurality of water turbines 5 for aeration are provided on the outer peripheral portion at predetermined intervals along the peripheral surface. .

As shown in FIGS. 1 and 2, the water turbine 5 has brackets 53 projecting from the outer periphery of the float at predetermined intervals.
The bracket 53 is rotatably supported on a horizontal shaft 54,
A plurality of aeration blades 51 and 52 are attached to the outer periphery of the horizontal shaft 54. This feather 5
1, 52 are arranged alternately in a straight line and in a curved line as shown in the drawing to make it easier to receive the energy of the scattered fountain, and to provide power for rotating the water turbine with the fountain energy. Then, the water is stirred near the surface of the sewage and aerated. In addition, the shape of the blade of this water turbine is not limited.

Further, the height (length) of the blades 51 and 52 attached around the horizontal shaft 54 of the water turbine 5 is determined so that the blades 51 and 52 are immersed in the water surface to a predetermined water depth. The water wheel 5 is installed on the float 10 so that aeration can be performed by stirring the water surface portion of the sewage with the rotation force of the water wheel 5.

Next, the operation and operation of the aeration apparatus of the present invention will be described. The sludge mixture in the aeration tank generates vertical convection by rotating the agitating blade 3 of the vertical shaft 2 of the aerator 1 and also causes an upward water flow to suck water and radiate water radially into the air. The fountain includes the blades 51, 52 of the water wheel 5.
The water wheel 5 rotates, agitates the vicinity of the water surface, and performs aeration. The jet water is feather 5
After colliding with 1 and 52, it falls and performs aeration.
The jet water that has not collided with the blades 51 and 52 falls and performs aeration.

When only agitating sewage without aeration, the buoyancy of the float is adjusted, for example, the air of the float is slightly extracted to make the blades 51, 52 of the water wheel.
Is the position to be submerged. When the motor is rotated in the reverse direction, the vertical shaft 2 of the aerator 1 rotates in the reverse direction, and the stirring blade 3 fixed to the vertical shaft 2 also rotates in the reverse direction. As shown in FIG. Generates a downward convection. At this time, the blades 51 and 52 immersed in the sewage by downward convection.
The water flow pressure acts on the sewage to rotate it, and the sewage is stirred in cooperation with the stirring blade 3.

[0017]

According to the aeration apparatus of the present invention, the rotating body is rotated by using the fountain force scattered to the outer periphery by the operation of the aerator, and the sewage surface is agitated. The surplus energy of the fountain is used without power to stir and aerate the sewage surface by rotating the turbine, and the scattered jet water drops after the collision with the turbine to perform aeration. Can do well.

In addition, since a plurality of water turbines arranged around the float can be rotated by using the fountain force during scattering, the agitated sewage can be moved from the center of the aeration tank to the outer periphery, so that aeration can be achieved. Can be performed uniformly in the aeration tank,
In addition, since the water wheel is mounted on the horizontal axis, the water wheel is easily affected by the fountain force during scattering, and the water wheel can be rotated efficiently.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an aeration apparatus of the present invention.

FIG. 2 is a plan view showing an aeration apparatus of the present invention.

FIG. 3 is a sectional view showing a state in which the rotation direction of the aerator of the present invention is changed.

[Explanation of symbols]

 Reference Signs List A Aeration tank B Aeration device 1 Aerator 2 Vertical axis 3 Stirrer blade 4 Motor 5 Water turbine 51 Blade 52 Blade 53 Bracket 54 Horizontal axis 10 Float

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Manabu Takeuchi 3-11-1, Shimosakabe, Amagasaki City, Hyogo Prefecture F-term in Hitachi Kiden Kogyo Co., Ltd. 4D029 AA04 AA07 AA09 AA11 BB10

Claims (2)

[Claims] 1. By switching the direction of rotation of a vertical axis having a stirring blade near a free surface, sucks in sewage and scatters the jet in a radial direction from above the water surface to make it come into contact with air; The aeration device installed in the float and the outer peripheral portion of the float in the aeration device that selectively performs the aeration action by feeding the water and the stirring action of the sewage that only agitates the water without sending air into the water. An aeration apparatus characterized by comprising a water wheel provided to rotate and perform aeration of sewage by receiving jet water pressure from an aerator. 2. A structure in which a plurality of water turbines are arranged at predetermined intervals along an outer peripheral portion of a float, and the turbine is rotatably supported on a horizontal axis, and a blade member for aeration is attached to the outer peripheral portion. The aeration apparatus according to claim 1, wherein: