JPH0746388Y2 - Piping structure for sewage treatment - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping structure for treating sewage in an air contact aeration treatment facility for treating sewage.

[0002]

2. Description of the Related Art Conventionally, in the discharge of treated water to a river in this kind of wastewater treatment facility, generally, in order to prevent the outflow of suspended solids in the water, an overflow weir is provided to discharge only the supernatant. And, for example, as shown in FIG.
The discharge pipe 1 is installed in the discharge port 102 opened above the weir 101.
03 of the discharge pipe 103 is connected to the upper end of the discharge pipe 103
It is designed to be discharged into rivers from 4. The discharge pipe 1
No. 03, in order to discharge efficiently, there is a drop between the overflow water level pipe part 105 and the discharge water level pipe part 106, and a drop pipe part 107 connecting both water level pipe parts is provided vertically.

[0003]

By the way, the sewage generally contains soap liquid flowing out of the household, and in such a discharge pipe 103, air is mixed when the treated water falls through the drop pipe portion 107. Then generate bubbles of soap,
The bubbles flowed out of the outlet 104 into the river and floated on the water surface, causing pollution. Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide a piping structure for treating sewage, which prevents bubbles of soap from mixing with treated water discharged from a discharge port to a river. To do.

[0004]

In order to achieve the above object, a piping structure for treating sewage according to the present invention is provided with an overflow water level pipe portion extending from a discharge port formed at the upper part of a treatment tank and the overflow water level pipe portion. It consists of a discharge water level pipe part that is arranged with a head from the flow level pipe part and a drop pipe part that connects both water level pipe parts so that the treated water in the treatment tank is discharged from the tip of the discharge water level pipe part to the river. In the piping structure according to, between the overflow water level pipe part and the discharge water level pipe part, one end is connected to the pipe upper surface of the discharge water level pipe part,
Further, a bypass pipe whose other end is connected to the upper surface of the overflow water level pipe part is arranged so that bubbles of soap in the discharge water level pipe part are returned to the inside of the overflow water level pipe part through the bypass pipe and discharged.

[0005]

When the treated water falls from the overflow water level pipe part to the drop pipe part, soap bubbles generated by the mixed air are separated into a bypass pipe in the discharge water channel pipe part. The separated soap bubbles rise up the bypass pipe and are returned to the overflow water level pipe section. Then, the treated water separated from the soap bubbles is discharged into the river through the discharge port at the tip of the discharge water level conduit.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the piping structure for treating sewage according to the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a wastewater storage tank in a contact air aeration treatment facility surrounded by an overflow weir 2, and an outlet 3 is provided at an upper position of the overflow weir 2. Reference numeral 4 is a discharge pipe constituted by a pipe line for discharging the treated water (supernatant) in the storage tank 1 to a river or the like. In this discharge pipe 4, a horizontal overflow water level pipe part 4a, a vertical drop pipe part 4b, and a horizontal discharge water level pipe part 4c are continuously formed in a substantially crank shape. Then, the upstream end of the overflow water level pipe portion 4a is connected to the outflow port 3 and the discharge port 5 at the downstream end of the discharge water level pipe portion 4c is installed facing the river.
The treated water is discharged by the difference between a and 4c.

Reference numeral 6 denotes a bypass pipe which is arranged in the middle of the discharge pipe 4 with its upper and lower ends communicating with each other. The bypass pipe 6 has its lower end 6a connected to the upper surface of the pipe at an intermediate position of the discharge water level pipe portion 4c, is bent horizontally at a position vertically extended to a position higher than the overflow water level pipe portion 4a, and has an upper end 6b. Is connected to the upper surface of the overflow water level tube portion 4a at an intermediate position. Reference numeral 7 in the drawing denotes a net stretched on the upper surface of the processing tank 1 for preventing bubbles of soap from scattering around.

The sewage treatment piping structure of the present invention is constructed as described above, and the treated water flowing out from the outlet 3 falls from the overflow water level pipe portion 4a to the drop pipe portion 4b, but at this time air is mixed. A lot of soap bubbles are generated in the water, and the treated water containing the bubbles reaches the discharge water level pipe portion 4c as it is. And
In the discharge water level pipe portion 4c, only the bubbles of soap are bypass pipe 6
It enters inside and is pushed up sequentially and rises, and is returned to the overflow water level pipe part 4a as it is. The treated water separated from the soap bubbles is discharged into the river through the outlet 5. in this way,
The soap bubbles repeat the process of rising in the bypass pipe 6, or are returned to the water surface of the treatment tank 1 from the outflow port 3 and disappear naturally.

[0009]

As described above, the piping structure for treating sewage of the present invention separates the bubbles of soap generated in the discharge pipe by connecting the bypass pipe in the middle of the discharge pipe extending from the treatment tank. Since the treated water without bubbles of soap is discharged to the river, the pollution of the river caused by bubbles of soap can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view showing the configuration of the present invention.

FIG. 2 is a sectional view showing a conventional example.

[Explanation of symbols]

 1 Treatment Tank 3 Discharge Port 4a Overflow Water Level Pipe 4b Drop Pipe 4c Discharge Water Level Pipe 6 Bypass Pipe

Claims (1)

[Scope of utility model registration request] 1. An overflow water level pipe part extending from a discharge port opened at the upper part of the treatment tank, and a discharge water level pipe part and both water level pipe parts arranged with a head from the overflow water level pipe part. In a piping structure that consists of a connecting drop pipe part and discharges the treated water in the treatment tank from the tip of the discharge water level pipe part to the river, between the overflow water level pipe part and the discharge water level pipe part, one end Is connected to the upper surface of the discharge water level pipe section and the other end is connected to the upper surface of the overflow water level tube section. A piping structure for sewage treatment, characterized by being returned to the inside of the main pipe section.