JPS6232566Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a sedimentation separation device in which a sludge scraper is installed in a treatment tank in which a water inlet to be treated and an outlet for treated water are connected in communication, and a sludge scraper that can be driven and rotated freely around the vertical axis. Regarding.

In the above-mentioned sedimentation separation equipment, scum such as seeds and vinyl scum mixed in the water to be treated flows into the treatment tank, and the scum rots and gives off a bad odor, worsening environmental hygiene. It has the disadvantage that it mixes into the treated water and deteriorates the quality of the water.

Therefore, in the past, a scum removal device was attached to a predetermined location around the processing tank, and the scum floating on the water surface was removed by suction or the like.

However, in general, the cross-sectional area of the treatment tank is large, and in order to effectively remove the scum floating on the entire water surface of the treatment tank, it is necessary to install multiple scum removal devices, or to install one scum removal device and A rotary scraper must be provided to collect the scum, which has the disadvantage of being expensive.

In view of the above points, it is an object of the present invention to reduce the number of scum and reduce the cost so that scum can be removed efficiently.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

The bottom 1a of the bottomed cylindrical treatment tank 1 is inclined so that it is located lower toward the center, and the sludge extraction passage 2 is connected to the center, and on the upper inner circumferential surface of the treatment tank 1, An outflow gutter 3 that takes out treated water by overflow is provided over almost the entire circumference, and a treated water takeout passage 4 is provided in the outflow gutter 3.
and a water inflow path 5 to be treated is connected to the treatment tank 1 in communication, and a scraper 6 for scraping the sludge settled and deposited on the bottom part 1a to the center is rotatable around the vertical axis P. A sedimentation separation device is provided for sedimentation and separation of treated water such as human waste, urban sewage, or industrial wastewater.

A rotating shaft 7 of the scraper 6 extends upward, and a motor 8 is interlocked with the rotating shaft 7.

A cylindrical partition wall 9 is provided concentrically with the rotating shaft 7 and communicates with the processing tank 1 only at the lower end side, and
The to-be-treated water inlet 5 is continuously connected to the middle part of the partition wall 9 in the vertical direction, so that the water to be treated flows into the partition wall 9 and the scum mixed therein is floated to the water surface within the partition wall 9. It is structured as follows.

A scum suction pipe 10 is attached to the partition wall 9, and its tip side is located near the rotating shaft 7,
A suction port 11 is provided there to face the water flow direction caused by the rotation of the scraper 6, and the other end faces a wire mesh-like collection basket 12 provided at a predetermined location on the upper inner circumference of the processing tank 1. Then, a nozzle 13 is connected to a midway point of the suction pipe 10 with the ejection direction facing the collection basket 12 side, and an air compressor 14 is connected in communication with the nozzle 13 to generate negative pressure due to air blowing. The scum is sucked up by the basket 12.
It is designed to be collected at The scum collected in this way can be discharged to an appropriate location by pulling up the basket 12 at an appropriate time.

The tip side of the suction pipe 10 from the suction port 11,
A bill blocking member 15 is formed by bending in an arc shape so as to surround the rotating shaft 7, and the scum is retained therein.
It is configured so that it can be sucked into the suction port 11 well.

Various modifications can be made to suck the scum, such as using a water supply pump instead of the air compressor 14, and the device consisting of the nozzle 13 and the compressor 14 or the pump is collectively referred to as a suction device 16.

In the embodiment described above, the bill blocking member 15 is constructed by effectively utilizing the suction pipe 10, but a separate member such as a plate may be provided in series.

Further, the collection basket 12 may be constructed such that only the lower part is in the shape of a wire mesh and the upper part is sealed, thereby preventing the diffusion of bad odors into the basket 12 during collection. Alternatively, the scum may be discharged to the outside of the processing tank 1.

In the present invention, the suction port 11 may be provided near the inner peripheral surface of the cylindrical partition wall 9.

In summary, the present invention provides the above-mentioned sedimentation separator in which a cylinder is connected to the processing tank 1 only at its lower end, coaxially or almost coaxially with the rotation axis P of the scraper 6. A scum suction pipe 1 is provided with a shaped partition wall 9, the to-be-treated water inflow path 5 is connected to the partition wall 9, and a suction device 16 is attached.
0 is provided with its distal end side suction port 11 facing inside the partition wall 9.

In other words, the scum mixed with the water to be treated and flowed in is floated inside the cylindrical partition wall 9, and is also floated inside the cylindrical partition wall 9 by the rotation of the scraper 6 and the water flow accompanying the inflow of the water to be treated. The floating fluid scum is sucked and discharged through the suction pipe 10.

Therefore, the inflowing scum is prevented from spreading over the entire surface of the processing tank 1, the scum is floated within the cylindrical partition wall 9 with a small cross-sectional area, and the water flow generated by the rotation of the scraper 6 originally provided is prevented. Alternatively, the scum can be floated and flowed using the water flow of the water to be treated flowing in from the inflow channel 5, and the scum can be removed even with one suction pipe 10 without installing a rotary scum scraper. It has become possible to remove scum effectively, and to reduce the number of scum and reduce the cost.

[Brief explanation of the drawing]

The drawings show an embodiment of the sedimentation separator according to the present invention, in which Fig. 1 is an overall vertical cross-sectional view, Fig. 2 is a plan view of the main part, Fig. 3 is a partially cutaway enlarged side view of the main part, and Fig. 4 is a cross-sectional view of the main part. The figure is a sectional view taken along the line -- in FIG. 1... treatment tank, 4... treated water outlet, 5...
To be treated water inflow path, 6... scraper, 9... cylindrical partition wall, 10... scum suction pipe, 11... suction port, 15... bill blocking member, 16... suction device, P...
...The rotation axis of the raking machine.

Claims (1)

[Scope of Claim for Utility Model Registration] A sedimentation system in which a sludge scraper 6 is provided in a treatment tank 1 in which a treated water inlet 5 and a treated water outlet 4 are connected in communication, and a sludge scraper 6 is rotatably driven around a vertical axis P. The separator is provided with a cylindrical partition wall 9 coaxially or almost concentrically with the rotational axis P of the scraper 6 and communicated with the processing tank 1 only at the lower end side, and The water to be treated inflow channel 5 is connected to the partition wall 9, and a scum suction pipe 10 equipped with a suction device 16 is provided with its distal end suction port 11 facing inside the partition wall 9. Separation device. A blocking member 15 for retaining scum is attached to the tip side of the scum suction pipe 10 in a state surrounding the rotation axis P of the scraper 6, and the suction port 11 is connected to the scraper 6. The sedimentation separator according to claim 1, which is located near the rotational axis P in a state where it faces the direction of water flow accompanying rotation.