JPH0141517Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a scum treatment device for a supernatant discharge device in which a float for scum bathing is also used as a scum discharge gutter, and scum can be reliably discharged.

[Prior art]

In a batch type processing apparatus, the precipitation supernatant liquid is discharged after the precipitation step, but at this time, scum may be floating in the processing tank. Therefore, it is necessary to eliminate this scum, but batch-type treatment tanks have drawbacks such as the fact that the scum removal mechanism becomes extremely complicated because the water level in the tank changes.

[Summary of the idea]

This idea was made to solve the above-mentioned drawbacks, and by providing an overflow port on the float that also serves as a scum bath, and rotating it with a float rotation device as appropriate, the water level in the tank can be moved up and down. It is an object of the present invention to provide a scum treatment device for a supernatant discharge device, which makes it possible to reliably discharge scum on the water surface as necessary with a simple configuration.

[Example of idea]

An embodiment of this invention will be described below with reference to the drawings.

Inside the processing tank 1, there is a supernatant overflow section 2 that can freely move up and down to discharge the supernatant liquid, and a float 3 that is swingably attached to the supernatant overflow section 2 and that also serves as a scum baffle and a scum discharge gutter. It is located.

As shown in FIGS. 1 and 2, the supernatant overflow section 2 includes a rotatable shaft pipe 4, a discharge pipe 5 connected to the shaft pipe 4, and a free end of the discharge pipe 5. It is composed of an overflow pipe 6 having an open overflow port 6a. Therefore, when the overflow pipe 6 descends below the water surface, the supernatant water in the treatment tank 1 flows into the overflow pipe 6 through the overflow port 6a, and is discharged to the outside via the shaft pipe 4. In addition, when the overflow pipe 6 is rotated by a rotating means (not shown) so that it is at a position higher than the liquid level, the liquid in the processing tank 1 is not discharged. Note that 7 in FIG. 2 is a blind plate that prevents the scum and supernatant water from being mixed.

On both sides of the skim overflow section 2, floats 3 which also serve as scum baffles are rotatably attached to a mounting plate 9 via pins 8. This float 3 has an overflow port 3a for discharging scum.
is provided.

This overflow port 3a may be divided into a plurality of parts as shown in FIG.

A connecting member 10 for rotating the float 3 is attached to the float 3. This connecting member 10 is provided with a long hole 10a that engages with a rod 11, as shown in FIG. Then, the protrusion 11a provided on the rod 11 is inserted into the elongated hole 10a,
By appropriately swinging the rod 11 in the direction of arrow B, the float 3 is rotated in the direction of arrow A,
Scum can be introduced into the float 3 through the overflow port 3a and discharged. Note that the rod 11 is fixed with a dowel pin 12 under normal conditions.

Further, in order to enable the float 3 to rotate smoothly, the scum discharge pipe 13 attached to the float 3 is preferably a flexible hose.

Here, this scum discharge pipe 13 may be led independently to a scum pit (not shown), but as shown in FIG. The scum may be discharged by connecting to the Further, as shown in FIG. 4, a blind plate 7 may be provided on each of the shaft pipe 4 and the discharge pipe 5, and the scum discharge pipe 13 may be connected to the discharge pipe 5 of the overflow pipe 6. Furthermore, as shown in FIG. 5, a double pipe may be used in which a scum discharge pipe 14 is arranged inside the shaft pipe 4 instead of the blind plate.

FIG. 6 shows a connecting member 10 for rotating the float 3.
and other embodiments of the rod 11 are shown. In this embodiment, as shown in FIG. 6a, the lower end of the bar 11 is pivotally engaged with the supernatant overflow section 2 via a pin 15, and is engaged with the elongated hole 10a of the connecting member 10. Two protrusions 11a are provided to protrude in parallel. Further, the rod 11 may be divisible into a plurality of parts.
That is, as shown in FIG. 6, the rod 11 may be detachably attached to the rod base 11b, and the rod base 11b may be inserted into the hole 11c provided at the lower end of the rod 11 only when performing scum discharge work.

FIG. 7 shows another embodiment of the engaging portion of the connecting member 10 and the rod 11, in which the protrusion 11a is provided protrudingly shifted by 180 degrees, and the rod 11 is similarly moved in the direction of the arrow RO to float. 3, and has the same effect as the above-mentioned embodiment.

FIG. 8 shows a plurality of processing tanks 1 (in this embodiment, two
), the scum is discharged from the discharge parts 17 on both sides, and the supernatant liquid is discharged from the central supernatant discharge part 18.
is discharged from. Note that the discharge portions 17 and 18 may be provided in reverse.

[Effect]

Next, the operation of this invention will be explained.

In the treatment tank 1, an aeration process, a precipitation process in which air blowing is stopped and sludge in the liquid is precipitated,
The operation in which the discharge step of lowering the supernatant overflow part 2 and discharging the supernatant liquid is repeated as one cycle, and the inflowing sewage supplied continuously or at arbitrary times is treated with activated sludge. Further, the sludge in the treatment tank 1 is extracted at an appropriate time.

Here, if the rod 11 is moved in the direction of arrow B at an appropriate time, for example after the aeration process is completed and before the discharge process, the float 3 which also serves as a scum baffle will be rotated in the direction of arrow A via the connecting member 10. The scum on the water surface is effectively discharged from the overflow port 6a.

Incidentally, the operation of the rod 11 may be automatic or manual.

〔effect〕

As described above, this invention has the effect of reliably discharging scum on the water surface by providing an overflow port in the float that also serves as a scum baffle and rotating it as appropriate.

[Brief explanation of the drawing]

Fig. 1 is a schematic vertical sectional view of one embodiment of this invention, Fig. 2 is a plan view of the same, Figs. 3 and 4 are plan views of other embodiments, and Fig. 5 is an implementation of the discharge section. A vertical cross-sectional view of an example, FIGS. 6 and 7 are explanatory views of the float rotating portion, and FIG. 8 is an explanatory view of the arrangement of this invention. 2...Supernatant overflow section, 3...Float, 3a...
Overflow port, 4...Shaft pipe, 5...Discharge pipe, 6
... Overflow pipe, 11... Rod.

Claims (1)

[Scope of utility model registration request] a supernatant overflow part for discharging supernatant that is movable up and down;
A scum baffle float attached to this supernatant overflow part, an overflow port for scum discharge opened in this float, and a scum discharge overflow port opened in this float are mechanically connected to the above float, and the float is rotated by its rocking. move it,
A scum treatment device for a supernatant discharge device, comprising a rod for discharging scum from the overflow port.