JPS5933511Y2 - helical scum skimmer - Google Patents

Description

[Detailed explanation of the idea] This idea is related to helical scum skim.

During the sewage treatment process, floating debris called scum is produced in settling ponds and sludge digestion tanks.

This scum forms a layer on the surface of sewage and reduces the efficiency of sewage treatment, such as by blocking the generation of gas, and therefore various devices and devices have been proposed to remove this scum.

A helical scum skimmer is a device for removing this scum, and usually has a structure as shown in FIGS. 1 and 2.

A shaft 50 is rotated by a drive device 51.

A helical scraping plate 52 twisted by half a turn is attached to the shaft 50 via a support member 55.

This shaft 50 is attached to the upper surface of the processing tank A, and the scraping plate 52 scrapes up the scum.

The collected scum falls into an outflow trough 53 provided in the processing tank A in parallel with the shaft 50, and is further discharged from a discharge pipe 54.

In the conventional helical scum skimmer having the above configuration, the scum is moved from the right to the left in FIG.
2, and is dropped into the outflow trough 53 at the position of the side wall B. Therefore, the ratio of the scum to the amount of sewage drawn out, that is, the concentration rate of the scum, becomes high, and this highly concentrated scum There is a disadvantage that the liquid accumulates in the trough 53, making it difficult to discharge.

The present invention has been made to improve this drawback, and by appropriately providing a partition plate on the scraper plate, high concentration of scum can be prevented.

FIG. 3 shows an embodiment of the present invention.

50 is a shaft, 1 is a scraping board, and 3 is a support member that supports the scraping board.

The scraping plate 1 has a helical shape twisted by half a turn, similar to the one shown in FIG.

The shaft 50 rotates in the direction of the arrow, and the front surface 10 of the scraping plate 10 serves as a surface for scraping up scum.

On this front surface 10, partition plates 2 are provided at appropriate intervals substantially perpendicularly to this surface.

Although this embodiment shows an example in which one scraping plate 1 is attached to the shaft 50, a plurality of scraping plates 1 may be provided.

According to the configuration of the present invention as described above, the scum is collected by each partition plate 2 and dropped into the outflow trough, so that the distance over which the scum is collected is shortened, and the concentration rate of the scum is lowered.

As a result, the discharge is carried out smoothly without scum accumulating in the outflow trough.

As explained above, according to the helical scum skimmer of the present invention, it is possible to lower the scum concentration rate, effectively prevent the accumulation of scum in the outflow trough, and easily discharge the scum out of the system. There are other effects.

[Brief explanation of the drawing]

FIG. 1 is a front view of a conventional hemline scum skimmer, FIG. 2 is a side view thereof, and FIG. 3 is a front view of a scraping plate section showing an embodiment of the hemline scum skimmer according to the present invention. DESCRIPTION OF SYMBOLS 1... Scraping board, 2... Partition plate, 3... Support material, 10... Front surface, 50... Shaft, 51...
1 drive device, 53... outflow trough, 54... discharge pipe.

Claims (1)

[Scope of utility model registration request] A hemi-karusukamu skimmer is characterized in that a scraping board is provided with partition plates at appropriate intervals.