JPH0711837Y2 - Air diffuser - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air diffuser for treating sewage.

[0002]

2. Description of the Related Art Conventionally, an activated sludge diffuser widely used in the water treatment industry has a check valve for preventing backflow on the blower side when the blower is stopped. Since the air in the long pipe is compressed by the action of water that normally rises to the water level in a deep water depth, it was not possible to prevent the reverse inflow of dirty water in the pipe.

Therefore, the air inlet of the air diffuser is apt to be clogged and it is difficult to clean it, and a large amount of pushing pressure of the motor is required to lower the water level when the air blowing operation is restarted. , The equipment maintenance cost was high.

In recent years, the intermittent aeration method has become widespread due to the advancement of technology in the treatment method by reducing the electric power cost of the blower and saving energy, but this treatment method is also clogged due to intermittent continuous use. It was easy to cause.

Therefore, the present invention aims to provide a highly practical air diffuser in which the technical drawbacks of the conventional method are eliminated.

The present inventor has already registered the first utility model
Although the invention according to No. 430592 (Japanese Utility Model Publication No. 56-33680) has been implemented, the present invention is a further improvement of this earlier invention.

[0007]

[Means for Solving the Problems] A large number of air diffuser holes are formed in the upper surface of a body having an air inlet and a pipe connecting portion in the center.
The diameter of this air diffuser is large on the inside and small on the outside.
This is an air diffuser in which a float is housed inside the container having a bottom plate.

[0008]

The air sent from the piping to the water chamber inside the vessel through the air inlet is jetted and sent out toward a number of diffuser holes on the upper surface of the vessel. As a result, air is sent into the dirty water while generating fine bubbles.

When the supply of air is stopped, sewage tries to flow back into the inside of the body through the air diffuser holes, but the float inside the body floats up and closes the air inlet of the body. This prevents sewage from flowing back from the air inlet.

Further, since the diameter of the air diffuser is different between the outside and the inside, the sludge adhering to the outside of the air diffuser should be pushed out by the air rapidly jetted from the inside mouth to the outside at the time of restart. Be removed.

[0011]

EXAMPLE 1 1 is an air diffuser body made of a synthetic resin material, and an air inlet 2 is provided at the center of this body.

Reference numeral 3 denotes a pipe connecting portion which is integrally provided upright on the air inlet 2.

Reference numeral 4 denotes a bottom plate screwed around the bottom surface of the diffuser body 1,

Denoted at 6 are air diffuser holes formed in the upper surface of the diffuser body 1, and the diameters of the diffuser holes are formed in a taper shape with a large inside diameter and a small outside diameter.

Reference numeral 7 denotes a space portion formed inside the air diffuser body 1, and if the space portion freely floats in this space portion.
Both accommodate a float 8 as a check valve that comes into contact with and separates from the air inlet 2 .

[0016]

[Effects of the invention] First, when the sewage being processed is going to flow back by the operation stop of the blower, since so close the air inlet immediately by the action of a float in the vessel body portion,
It is possible to prevent backflow of dirty water.

Second, even if sludge adheres to the outside of the air diffuser holes while the blower is stopped and tries to be clogged, the inner diameter is large relative to the outer diameter of the small air diffuser holes. A large pressure injection force is generated on the outer side to rapidly push out, and it is possible to prevent the occurrence of clogging of the diffuser holes.

Thirdly, due to the second effect, the load on the motor of the blower can be reduced, and the operating cost of the device can be reduced.

[Brief description of drawings]

FIG. 1 is an overall plan view

FIG. 2 is a front sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Air diffuser 2 Air inlet 6 Air diffuser 8 Float

Claims (1)

[Scope of utility model registration request] 1. A bored a number of diffusing pores on the upper surface of the air inlet and the pipe connecting portion is provided with the device body in the center, as the diameter of each diffusing pores which formed small to large the outside to the inside And
While floating freely inside the body with the bottom plate
An air diffuser comprising a float that comes into contact with and separates from the air inlet .