JPS6369512A - Sand basin installation - Google Patents

Abstract

PURPOSE:To reduce the required area for a sand basin and to reduce the installation cost, by providing a scum screen to the backside of a chain so as to be brought into contact with scum rakes in a settled sand scraping-up conveyer and by integrating the scraping-up function of the settled sands with the scum removing function into one unit. CONSTITUTION:Backets 3 and scum rakes 30 are provided to the chain of the settled sand scraping-up conveyer, and the scum screen 31 is provided to the backside of the upward moving part 18 of the chain 2 so as to be brought into contact with the scum rakes 30. A front screen 32 is preferably provided in front of a sprocket wheel 4. The scums 33 in the water stream flowed into the sand basin are removed by the scum screen 31 and scraped up by the scum rakes 30 and discharged to the outside by a belt conveyer 11 with the sands scraped up by the backets 3. Thus the scum removing function is integrated with the scraping-up function of settled sands into one unit, and the required area for the sand settling pond as well as the cost for the installation of the sand settling pond are reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to improvements in settling basin equipment for sewage treatment plants.

[Conventional technology]

Figure 2 is a partial side view of a settling basin in a conventional sewage treatment plant, where (1) is the settling basin, (2) is the chain, (3) is the bucket, (4) is the sprocket wheel, and (5) is the settling basin. is the arm,
(6) is the arm lifter, (7) is the rotating shaft, (8) is the drive shaft, (9) is the motor, is the pick-up, (ID is the belt conveyor, (Foundation) is the screen, (2) is the scum screen , αXun chopping machine, (5) is a belt conveyor, (
The station is an arrow indicating the 8 movement directions of the chain, 07) is the horizontal movement part of the chain, the α mark is the upward movement part, the cry is the water flow, the kiln is the sand, and (sha) is the water surface.

Sewage is introduced as a stream (5) and first passes through a screen (
After the floating wood and plastic debris are removed by the sand sink (1), they flow into the settling area (1). Since the sand settling basin (1) has a large cross-sectional area and the flow velocity of the water flow (α) decreases, the sand in the water flow (2) settles and is deposited on the ground. The water stream 0, which has sedimented and removed the sand, has a steep screen θ to remove floating matter (
After removing the liquid, it flows into the next step. The sludge collected on the sludge screen Otsu is scraped up by the sludge scraper α, and discharged outside the site by the belt conveyor 0ω.

To discharge the sand piles accumulated on the bottom of the earth, use a chain attached to the bucket (3) in the same direction as the arrow (9 times) to scrape off the sand from the bottom of the pond, and carry it upward with the bucket (3). ,
Discharge outside the site by belt conveyor (+1). The chain (2) is driven by operating a drive shaft (8) by a motor (9). Since the surface height of the sand pile deposited on the ground changes with time, the arm lifter (6) is operated to move the arm (5) parallel to the axis of rotation (7) as shown by the dashed line, and lift the bucket ( 3) Sand that constantly accumulates■
Adjust so that it can be scraped off well.

[Problem that the invention seeks to solve]

By the way, in the above-mentioned equipment for the sand settling area, the equipment for scraping and discharging the settled sand and the equipment for collecting and discharging the sediment are separately installed and operated separately. As a result, the area required for the sand settling site becomes larger and the overall equipment cost increases.Therefore, in order to reduce the equipment cost, it has become a matter of concern to integrate both of the above-mentioned functions.

In response to the above-mentioned needs, the present invention aims to provide equipment that integrates the functions of sand removal and sand removal in a sand settling basin.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a sediment scraper for a sand settling basin, in which a bucket and a sediment rake are attached to the chain, and the above-mentioned sludge rake is attached to the chain at the rear of the upward moving part. A pickling screen was placed in contact with the pickling rake.

(Function) Since the settling basin equipment is configured as described above, the sediment in the water flowing into the settling basin is removed by the above-mentioned residue screen, raked up by a pickling rake attached to a chain,
The sand is raked up by a bucket and then discharged offsite by a belt conveyor.

(Embodiment of the invention) Fig. 1 is a block diagram of a sand settling and gravel scraping machine according to an embodiment of the present invention, in which (1) to (sha) are the same parts as the conventional device, and (1)
) Hashizuke lake, t31) Hashimi screen, □□□ is the front screen, (to) Hashiki.

As shown in the figure, the pickling rake (1) is attached to the chain (2) of the sand settling machine together with the bucket (3). Further, a residue screen roller υ is arranged behind the chain at the upward moving part of the chain marked a, and a front screen (2) is arranged in front of the sprocket wheel (4). The sludge floating in the water flow αω is collected by the sludge screen (31) and deposited on the screen. The shizuke rake (1) attached to the conveyor scrapes the shizuke (1), carries it upwards, and discharges it into the conveyor (11), so the conveyor (11) carries it out of the site together with the sand and shizuke. transport.

In the above embodiments, the structure, number, etc. of the sludge screen 0υ and the sludge rake should be determined depending on the situation of each sewage.

[Effects of the Invention] The present invention integrates a sediment scraper and pickling machine in a settling basin of sewage treatment equipment, which simplifies the preparation of the sand settling facility and reduces the area required for the settling basin. This made it possible to achieve the excellent effect of significantly reducing the construction cost and operating cost of the sand settling basin facility.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a sand settling basin facility that is an embodiment of the present invention.
Figure 2 is a side view of a part of a conventional sandpit. In the figure, (1) is the settling basin, (2) is the chain, (3) is the bucket, (4) is the sprocket wheel, (7) is the rake, (01) is the pickle screen, and (2) is the front part. The screen is (to) a scan. Agent: Tadashi Sato, Patent Attorney (Written on his own initiative) Dec. 24, 1939

Claims (1)

[Claims] In a sediment scraping machine for a settling pond in a sewage treatment plant, a sludge rake is attached to the chain together with a bucket, and a sludge screen is installed at the rear of the chain in the upward movement part of the chain so as to come into contact with the sludge rake. This is a sand settling pond facility that is characterized by: