JPH0622645B2 - Solid-liquid separation device for screen residue - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention supplies screen dust collected by a plurality of dust removers from a sewage treatment plant or the like into a downflow trough and conveys it down to remove the screen residue. The present invention relates to a solid-liquid separation device for screen residue, which is separated and collected from running water.

[Conventional technology]

In a large sewage treatment plant, etc., a plurality of dust removers are installed in one pond, each dust remover is operated to scrape the screen residue, and the running water troughs are installed in the intersecting direction at the top of each dust remover. It is supplied to the inside of the trough, and a trough is provided at the end position of the trough.The screen residue collected by this trough is thrown into the water reservoir together with the drainage water, and the backwash type dust remover provided in the trough is installed. Although it is scraped up and discharged by the filter surface circulation type dust remover, there are many troubles in the conventional model due to the large amount of residue, and there was no effective solid-liquid separation device.

[Problems to be Solved by the Invention]

The screen residue collected by each dust remover is collected in one place by being transported down the running water trough, and is also washed naturally in the downflow, but the screen residue flowing down this trough. Since the amount is larger than the amount floating in the pond of the sewage treatment plant, a screen is installed at the outlet of the running water trough to capture the screen residue flowing down in this trough and separate it from the running water. It is removed by rake.

The spilled water passes through the screen and is discharged to the outside of the trough,
If necessary, after passing through the furnace, water is sent to the tip side of the trough for recycling. In the conventional dust remover, there is only one screen surface, and if the amount of residue is large, the screen will be blocked,
There was a risk that the spillage would overflow from the reservoir. Further, in the case of the back lining type, residue is accumulated in the portion where the rake is caught at the bottom of the screen, and overload occurs. In the filter surface circulation type, there was a problem that the residue that entered the endless circulation screen had no outlet and accumulated and grew to block the screen.

The present invention provides a solid-liquid separation device for a screen residue, in which clogging is unlikely to occur, overload does not occur during rake scooping, residue does not accumulate in the water storage portion, and solid-liquid separation can be reliably performed. To aim.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a solid-liquid separation device for a screen residue that separates a screen residue flowing down a flowing water trough from the flowing water, and a water storage part is provided at the end part of the flowing water trough, and the rake is stored in the water storage part. A screen residue scraping device for scraping and discharging the screen residue by moving is arranged, the lower part of the screen of the screen residue scraping device is bent into a U-shape, and the side surface of the U-shaped bent part is closed by the side wall of the water storage part. ,
The gist is that a drainage port is provided on the side wall of the water storage portion surrounded by the U-shaped bent portion of the screen.

[Work]

The screen residue collected from each dust remover is put into one running water trough to be collected and transported down one by one, and in the water storage section provided at the end of the trough,
It is captured by the screen and scraped off by rake. At this time, the screen is bent in a U shape at the lower part of the screen, and the drainage water is drained to the outside of the trough from the drain port provided on the side wall of the water storage part surrounded by the U-shaped bend portion of the screen. The water can be drained in the completely removed state, and the screen residue can be reliably captured by the upstream screen or the downstream screen, and solid-liquid separation can be reliably performed. Further, this allows the circulating water to be easily reused.

[Examples] The present invention will be described below based on illustrated examples.

In the figure, 1 is a running water trough arranged below the screen residue discharge ports of the dust removers arranged in parallel in the sewage treatment plant. When the screen residue scraped up by each dust remover is supplied into the running water trough 1, this running water trough It will be made to flow down to the terminal part by the flowing water inside.

The terminal part of the running water trough 1 is arranged so as to be lower than the starting end side, the water storage part 3 is formed at this terminal part, and the screen residue raking device 2 is arranged in the water storage part 3. The screen residue scooping device 2 is arranged so that its lower end is located lower than the running water trough 1 and is immersed in the water storage part 3 and that the upper end is located above the running water trough 1 with a required inclination angle. Then, the outer side is covered with a cylindrical casing 21, a sprocket wheel 22 is arranged in the upper part, and a guide rail 23 bent in a U shape is arranged in the lower part. A chain 24 is stretched between the sprocket wheel 22 and the U-shaped guide rail 23. Then, a plurality of rakes 25 are projected on the chain 24 at predetermined intervals, and a screen 26 and an apron 27 are arranged on the extension line of the screen 26 along the trajectory of the rake 25 in the ascending direction.

The lower part of the screen 26 is bent in a U shape, the side surfaces of the U-shaped bent portions 26a, 26b are closed by the water storage side wall 31, and the drain port 32 is formed in the water storage side wall 31 surrounded by the U-shaped bent portions 26a, 26b. To provide. The U-shaped bent portion 26b on the back side of the screen 26 is formed to be shorter than the U-shaped bent portion 26a on the front side, but even in this case, the water level is slightly higher than the water level of the water reservoir 3.

As a result, the spilled water in the water storage unit 3 passes through either the U-shaped bent portions 26a, 26b on the front side or the back side of the screen and is drained from the drainage port 32 through the drainage trough 33.

〔The invention's effect〕

According to the present invention, the screen residue flowing down from the running water trough into the water storage portion is reliably captured by the U-shaped bent portion of the screen, and is scraped up by the rake moving along the screen and discharged, and the drainage water is discharged. Since there is no solid matter, there is an advantage that solid-liquid separation can be reliably performed.

[Brief description of drawings]

1 is a front view and FIG. 2 is a side view showing a solid-liquid separation device for screen residue of the present invention. 1 is a running water trough, 2 is a screen residue raking device, 25 is a rake, 26 is a screen, 26a is a front U-shaped bent portion, 26b is a rear U-shaped bent portion, 27 is an apron, 3
Is a water storage part, 31 is a water storage part side wall, and 32 is a drainage port.

Claims (1)

[Claims] 1. A solid-liquid separation apparatus for a screen residue that separates a screen residue flowing down a running water trough from the running water, wherein a water storage section is provided at the terminal end of the running water trough, and the screen residue is moved by moving a rake to the water storage section. A screen residue scraping device for scraping and discharging is arranged, the lower part of the screen of the screen residue scraping device is bent into a U-shape, and the side surface of this U-shaped bent portion is closed by the side wall of the water storage part. A solid-liquid separation device for screen residue, characterized in that a drainage port is provided on a side wall of a water storage section surrounded by a bent section.