JPS5811363Y2 - Wastewater treatment tank - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wastewater treatment tank, and particularly to a wastewater treatment tank for separating oil and water to separate and remove oil and dirt from wastewater from kitchens, gas stations, equipment repair shops, etc.

Conventional wastewater treatment tanks of this type are equipped with an oil-water separation wall in the drainage channel inside the tank, and the oil in the wastewater is attached to the separation wall to separate the oil and water, and the purified wastewater is then released outside the tank. It is known that it is discharged to

However, conventionally, the separation wall consists of a plurality of mutually independent plates, and these plates are simply arranged at intervals and perpendicular to the direction of drainage, so that the oil-water separation effect cannot be sufficiently achieved. Not only is this not possible, but the work of removing these plates one by one from the tank, cleaning them, and reinstalling them into the tank is extremely complicated.

In view of the above points, it is an object of the present invention to provide a wastewater treatment tank that improves the oil-water separation effect by particularly improving the oil-water separation wall, and also allows easy removal and installation of the tank. .

An embodiment of the present invention will be described below in detail based on the drawings.As shown in FIGS.
It is made of P-reinforced plastic and has a flange 2 on the edge of the opening. A drainage inlet 3 is provided at one end, and a drainage outlet 4 is provided at the other end. A flow path 5 is formed.

In the drainage channel 5 in this tank 1, there is a strainer 6 for removing dust.
and an oil/water separation wall 7 are installed.

The strainer 6 is formed into a box shape with an upper opening made of a porous material such as a punching plate or a wire mesh, and is detachably installed in the tank 1 so that the upper opening is located directly below the drainage inlet 3.

The separation wall 7 is a plate-shaped body made of reinforced plastic or stainless steel, and is formed with a pair of continuous unit walls 7a and 7b that are bent into a simple cross-sectional shape. (2) Unit walls 7C and 7d that are bent and extended in a zigzag bellows shape.

7e, 7f, 7g, and 7h are formed, and these unit wall portions are arranged to be inclined in the width direction of the drainage channel 5.

All the single wall parts are formed to have approximately the same width and are dimensioned so that they come into contact with the inner wall of the tank when inserted into the tank 1, and the separation wall 7 has elasticity as a whole and has a ■-shaped bent part. They are elastically secured to the inner wall surface of the tank 1, and are provided across the entire width of the tank 1.

As can be easily understood from FIG. 4 showing a downward perspective view of the separation wall and FIG. direction)
A drainage receiving wall 8b is provided by extending and protruding the lower edge of the second unit wall 7b which is adjacent to and follows the lower edge of the first unit wall 7a which is opposite and precedes. Furthermore, the third
to eighth unit wall portions 7C, 7, d, 7e, 7f, 7g,
Drainage receiving wall portion 8C that protrudes in stages from the lower edge of 7h,
It is equipped with 8d, 8e, 8f, 8g, and 8h.

In the illustrated embodiment, the separation wall 7 is
Although the number of such unit walls is arbitrarily determined depending on the size of the tank 1, in the present invention, the separation wall 7 is It is sufficient to form at least two continuous unit walls that are bent into a roughly ■-shaped surface, that is, the first and second unit walls 7 a and 7 b in the figure. Therefore, in this case, the second unit wall It is sufficient if 7b is provided with a drainage receiving wall 8b.

The wastewater treatment tank 1 is buried underground or in the concrete floor of a building, and a wastewater inlet 3 is connected to a wastewater connection pipe from a kitchen, etc., and a wastewater outlet 4 is connected to a wastewater, etc. drainage pipes will be connected.

With the oil-water separation wall 7 inserted into the tank 1, unit water storage chambers 9a, 9b, and 9C partitioned by unit walls 7a and 7b are formed as shown in FIG. 6.

Thus, the drainage channel 5 that interconnects the unit water storage chambers is formed only below the unit walls 7 a and 7 b.

When the waste water flowing in from the waste water inlet 3 first passes through a strainer 6, dirt and the like in the waste water are removed.

Subsequently, the oil in the drain water is separated and removed by the oil/water separation wall 7 while the drain water passes through the drain channel 5 and reaches the drain outlet 4.

Normally, wastewater from kitchens and the like is not flushed continuously, but is generally flushed intermittently.

Therefore, as shown sequentially in FIGS. 6C and 6D, a certain amount of waste water W-1, which first flows in through the strainer 6 from the inlet 3, first hits the first unit wall 7a and enters the One unit stays in the water storage chamber 9a.

At this time, the drainage is carried out at the first unit wall 7, as shown in FIG.
The oil in the drainage water is decelerated and rectified along the inclined surface a and adheres to the unit wall portion 7a.

The attached oil rises along the wall surface of the unit wall portion 7a due to buoyancy.

Next, when a certain amount of the second waste water W-2 is inflowed at a time interval, as shown in FIG. The waste water W1 that was being drained is pushed to the second unit water storage chamber 9b through the drainage flow path 5 and impinges on the second unit wall portion 7b.

It is expected that this displaced wastewater W-1 will re-adhere the oil in the drainage to the lower edge of the first unit wall 7a when it passes through, and will also be transferred to the second unit water storage chamber 9b. Finally, the second
The oil in the drainage is further adhered to the unit wall 7b while being rectified along the slope of the unit wall 7b.

Furthermore, when a certain amount of the third waste water W3 is inflowed at a time interval, the waste water W-1 that had accumulated in the second unit water storage chamber 9b is transferred to the third unit as shown in FIG. 6d. When the water is pushed into the water storage chamber 9C and passes through the lower edge of the second unit wall 7b, further oil-water separation is expected at the lower edge, and the water is drained from the drain outlet 4.

Thereafter, the same action is repeated to separate the oil and purified waste water is discharged from the outlet 4.

Incidentally, when a large number of unit water storage chambers are formed by making the intervals between the unit walls small as shown in the first diagram, a certain amount of wastewater flows into the plurality of unit water storage chambers at once, but after that, it flows intermittently one after another. The basic principle of oil-water separation is the same as described above.

Incidentally, during maintenance, the strainer 6 may be taken out from the tank 1, cleaned, and then placed in the tank 1 again.

Further, since the oil/water separation wall 7 similarly has a plurality of unit wall parts integrally, it can be taken out from the tank 1 with one touch, cleaned, and then installed in the tank 1 again with one touch.

As a result of the present invention configured as described above, the effect of separating oil and water from wastewater is significantly improved compared to conventional wastewater treatment tanks, and the intended purpose can be satisfied.

Furthermore, the removal and attachment of the oil/water separation wall to the tank is simple and easy, and maintenance and inspection are convenient.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing one embodiment of the present invention, Fig. 2 is a cross sectional view thereof, Fig. 3 is an separated perspective view thereof, and Fig. 4 is a perspective view from below showing an example of an oil/water separation wall. Fig. 5 is a developed view of the same, Fig. 6 a is a plan view showing the inflow state of wastewater, Fig. 6, C,
d is a vertical cross-sectional view showing the flow of drainage. 1... Wastewater treatment tank, 3... Wastewater inflow, 4... Interrogating water outlet, 5... Drainage channel, 7...
・Curved oil/water separation wall, 7a, 7b, 7C, 7d, 7e, 7f
, 7g7. h--curved unit wall, 8b, 8C98d88e
, 8f, 8f, 8g, 8h...Interrogating water receiving wall.

Claims (1)

[Scope of utility model registration request] In a tank 1 in which an oil-water separation wall 7 is provided in a drainage channel 5 extending from a drainage inlet 3 to a drainage outlet 4;
are provided over the entire width of the tank 1, and form a plurality of unit walls 7a, 7b that are bent into a simple cross-sectional V shape and continue, and the unit walls 7a, 7b are connected to the drainage channel 5. is arranged to be inclined in the width direction of the unit wall 7b, and extends and protrudes the lower edge of the unit wall 7b that follows the lower edge of the unit wall 7a that precedes the unit wall 7a opposite to the drainage advancing direction, and is provided with a drainage receiving wall 8b. Consistency: Unit water storage chambers partitioned by the unit walls are formed in the tank 1, and a drainage channel 5 that interconnects each unit water storage chamber is formed only below the unit wall. Characteristic wastewater treatment tank.