JPS5916093Y2 - Scum separation and removal equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for separating and removing scum floating on top of water discharged from a coagulation and sedimentation tank in sewage treatment equipment.

Traditionally, this type of scum is collected in scum skimmers,
Since the solid matter was separated and removed using a wire mesh, etc., it was easy to get clogged with fine particles.

Therefore, a disk type separator has been used to deal with this situation, and the separated solids are removed by inserting a scraper between rotating disks.

However, even with this type, in order to use it for separating scum, the gap between the discs is usually around several millimeters or less, and both the disc and the scraper must be made with high precision, so cutting is required. Moreover, since the scraper is thin, there are also problems in terms of strength.

This invention was made in view of the above circumstances, and its purpose is to improve removal efficiency by continuously and reliably separating and removing scum, and to separate and remove scum without causing clogging. The goal is to provide equipment.

This invention will be explained below based on an embodiment shown in the drawings.

In FIGS. 1 and 2, 1 is a tank, and inside this tank 1, a plurality of scum A-removing rings 2 are arranged in parallel at appropriate intervals at a position where a part of the outer circumference slightly protrudes from the water surface, and a filtration drum 3 is installed.
At the same time, three rotating shafts 4 mounted across the annular ring 2 between the front and rear walls of the tank 1 are internally supported inside the ring 2, and the shafts 4 are connected to drive members such as motors (Fig. (not shown) to rotate in the direction of the arrow.

In addition, disk-shaped spacers 5 having the same width as the rings 2 are provided on the rotating shaft 4 alternately to maintain and regulate the axial spacing of the rings 2, and to extend the outer periphery of the rings 2. The distance between the outer circumference of the rotating shaft 4 and the outer circumference of the spacer 5 is made equal to the width of the ring 2 so as to coincide with the outer circumference.

A dewatering roll 6 is disposed on the outer periphery of the ring 2 facing the rotating shaft 4 of the uppermost spacer 5 to crush the discharged scum and reduce its moisture content. When the dewatering roll 6 is installed in this manner, it is preferable that one of the outer peripheries of the ring 2 and the spacer 5 protrude slightly from the other in order to improve the dewatering performance.

Further, a scraper 7 is erected on one side of the tank 1, and its sloping upper part slides into contact with the outer periphery of the ring 2, and a scum reservoir 8 is installed at its lower part.

In addition, in the figure, 9 is the inlet of the discharged water, 10 is the separated water outlet pipe, and 1
1 is a separated water outlet, and 12 is a scum drift prevention member.

In such a configuration, the scum A that flows in as discharge water from the inlet 9 of the tank 1 drives the rotating shaft 4, and the ring 2 (
By rotating the filtration drum 3), the water is continuously filtered and separated from the flowing water, transported to the protruding outer peripheral surface of the filtration drum 3, dehydrated by the filtration drum 3 and the dewatering roll 6, and sent to the scum reservoir 8 by the scraper 7. removed.

At this time, since spacers 5 having the same width are provided at intervals in the axial direction of the rings 2 constituting the filtration drum 3, the filtration drum 3 does not receive constant cleaning action due to the synchronous rotation of the spacers 5. No clogging occurs.

On the other hand, the flowing water separated by the filtration drum 3 is discharged to the outside through the take-out pipe 10 that is open toward the inner circumference of the filtration drum 3, but if necessary, the water is discharged from the filtration drum 3 again. While the water flows through the gap between 2 and performs cleaning, the outlet 1
It is discharged from 1.

In the above embodiment, three rotating shafts 4 are provided for rotationally driving the ring 2 (filtering drum 3) and the spacer 5, but the invention is not limited to this, and any number of shafts may be used as long as there are three or more. good.

In addition, it is not necessary to provide a driving member for all of them, and the ring 2
(The filter drum 3) and the spacer 5 may be rotated by one.

As described in detail above, this idea consists of a filter drum constructed by arranging a plurality of rings at appropriate intervals, and this filter drum is rotated by a rotating shaft placed inside the drum, so that the effluent water is Continuously and reliably filters and separates scum from
It can be removed to the outside, and the removal efficiency can be significantly increased compared to conventional methods.

In addition, disc-shaped spacers attached to the rotating shaft are provided alternately at intervals in the axial direction of the ring, and these spacers rotate while sliding against the side of the rotating ring, completely preventing clogging of the filtration drum. This allows the device as a whole to exhibit extremely stable performance.

In addition, since the ring is supported and rotated and the spacer is rotated by at least three rotating shafts, the entire device is simplified, the installation space within the tank is small, and the installation cost is reduced. It is easy to maintain and manage the drive equipment, which can be easily damaged if it is submerged in liquid.
There is no need to install multiple drive transmission mechanisms in the tank, and the life of the device is extended.

Furthermore, since at least three spacers are provided corresponding to the rotating shaft, the gaps between the rings can be maintained uniformly in the entire circumferential direction, making it possible to obtain a device with high precision. It has excellent effects.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and FIG. 1 is a partially longitudinal front view showing the inside, and FIG. 2 is a sectional view taken along line II--II in FIG. 1. 1...tank, 2...circle, 3...
・Filtering drum, 4...Rotating shaft, 5...
disc-shaped spacer.

Claims (1)

[Scope of utility model registration request] A plurality of rings each having a part of its outer periphery protruding from the water surface are arranged in a tank at appropriate intervals, and at least three rotating shafts are inscribed in the inner periphery of each ring to rotate each ring. 1. A scum separation and removal device characterized in that disk-shaped spacers are arranged alternately with each ring on the rotating shaft to maintain and regulate the axial spacing of each ring.