JPH0619899U - Air diffuser - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a device capable of reliably removing a clogging phenomenon caused by sludge that occurs at an air inlet of an air diffuser. [Structure] A large number of air diffusing holes are provided in the upper surface of a body having an air inlet in the center, and the diameter of the air diffusing holes is formed to be large inside and small outside.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air diffuser for treating sewage.

[0002]

[Prior art]

 Conventionally, the activated sludge air diffuser, which has been widely used in the water treatment industry, has a check valve for preventing backflow on the blower side in case the blower stops, but it has a large diameter and long piping. Since the air in the room is compressed by the action of water that normally rises to a deep water level, it was not possible to prevent the reverse inflow of wastewater into 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 pressing pressure of the motor is required to lower the water level when the air blowing operation is restarted. , The equipment maintenance cost was high.

[0004] In recent years, the intermittent aeration method has become popular due to the sophistication of technology in the treatment method by reducing the electric power cost of the blower and saving energy. However, this treatment method is also intended for intermittent continuous use. It was easily clogged.

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

The inventor of the present invention has already implemented the device according to Registered Utility Model No. 1430592 (Sho-ko 56-33 680), but the present invention is a further improvement of the previous device.

[0007]

[Means for Solving the Problems]

 A large number of air diffuser holes are formed in the upper surface of the body that has an air inlet and a pipe connection in the center, and the diameter of these air diffuser holes is formed to be large on the inside and small on the outside. It is an air diffuser that contains a float inside.

[0008]

[Action]

 The air now 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.

Further, when the supply of air is stopped, sewage tries to flow back into the inside of the body through the air diffusion holes and invade, but the internal float 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 diffuser hole is different between the outside and the inside, sludge attached to the outside of the diffuser hole is likely to be pushed out by the air that is rapidly ejected from the inside mouth toward the outside during restart. To be removed.

[0011]

【Example】

 Reference numeral 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 integrally provided upright on the air inlet 2.

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

6 is a diffuser hole formed in the upper surface of the diffuser body 1 in a large number, and the diameter of the diffuser hole is 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 diffuser body 1, and a float 8 is accommodated in the space portion.

[0016]

[Effect of device]

 First, when the sewage being treated is going to flow back due to the blower's operation being stopped, the air inlet will be directly blocked by the action of the float inside the body, thus preventing the backflow of sewage. be able to.

Secondly, even if sludge adheres to the outside of the air diffuser holes while the blower is not operating and becomes clogged, the inner diameter is large relative to the outer diameter of the small air diffuser holes, so when the operation is resumed, the inner diameter is large. From this, a large pressure injection force is generated in the outward direction, and it is pushed out rapidly, 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 cost of using 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 body 2 Air inlet 6 Air diffuser 8 Float

Claims (1)

[Scope of utility model registration request] 1. 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 at the center, and the diameter of the air diffuser is formed to be large inside and small outside, and a bottom plate is formed. An air diffusing device, characterized in that a float is housed inside the container.