JPH08912A - Sedimentation separation apparatus - Google Patents

Abstract

PURPOSE:To easily provide an inclined plate separator by making the spaces between the upper chambers in a sedimentation tank free. CONSTITUTION:This sedimentation separation apparatus consists of a sedimentation basin 1 having a sludge sump formed to a part of the flat bottom surface thereof in a recessed state, a sludge gathering machine 5 having a cross-sectional shape vertical on the side of the sludge sump and having a downwardly inclined surface on the side opposite to the siege sump thereof and consisting of a plurality of scraping plates 5a provided at a predetermined attaching interval, a drive part reciprocally moving the sludge gathering machine 5 over at least the distance corresponding to the attaching interval of the scraping plates 5a and provided on one side of the sludge gathering machine 5 and the inclined plate separator 8 arranged in the sedimentation basin 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sedimentation separator, and more particularly to a sedimentation separator which has a reciprocating type mud collector so that an inclined plate separator or the like can be arranged in an upper space to enhance treatment efficiency. .

[0002]

2. Description of the Related Art Conventionally, a sedimentation device of this type has a sludge reservoir formed by forming a recess in a part of the bottom of a sedimentation basin, and moves toward the sludge reservoir at the bottom of the sedimentation basin. A scratching board is provided.

Therefore, while raw water such as sewage supplied from one side of the sedimentation pond moves to the other side of the sedimentation pond,
The sedimentary impurities fall and are deposited on the bottom of the sedimentation basin, and the treated water obtained by separating the impurities can flow out from the other side of the sedimentation basin.

Impurities deposited on the bottom surface of the sedimentation pond, that is, sludge (sludge), is collected in the sludge tank by a scraping plate driven by an endless chain that moves toward the sludge tank on the bottom surface. The sludge is discharged and subjected to sludge treatment such as dehydration treatment (see, for example, Shokai 62-35609).
No.

Further, in Japanese Unexamined Patent Publication No. 5-245308, the cross-sectional shape of the scraping plate is vertical on the sludge reservoir side and has an inclined surface which is inclined downward toward the side opposite to the sludge reservoir. , A technique for reciprocating a scratching board to collect mud has been proposed.

[0006] The scratching plate according to this proposal reciprocates by the distance of the scraping plate mounting distance without moving the bottom surface of the sedimentation tank from one side to the other side like a scratching plate provided on an endless chain. It has the feature that it can collect mud just by moving it.

[0007]

However, in the above-mentioned conventional settling / separating device that uses an endless chain to drive the scraping plate, the endless chain becomes an obstacle to enhance the settling effect in the settling basin. It is difficult to install the inclined plate separator of, and because the endless chain alternately moves between air and water, the chain easily corrodes,
There was a problem that durability was inferior and maintenance was troublesome.

Further, in the case of reciprocating the scraping plate, a reciprocating driving part such as a hydraulic cylinder is arranged above the sedimentation basin, and the scraping plate of the driving part is connected by a wire. It has the same problems as when using a chain.

Therefore, the present invention has been made to solve the above-mentioned problems, and its purpose is to provide a precipitation separating apparatus which does not obstruct an inclined plate separator or the like arranged in a precipitation source in a mud collector. To provide.

[0010]

In order to achieve the above-mentioned object, a sedimentation separation apparatus according to the present invention has a sedimentation pond having a flat bottom surface and a sludge reservoir in which a part of the bottom surface is formed in a concave shape. A sludge collector whose cross-sectional shape is vertical on the sludge reservoir side, has a downward inclined surface on the opposite side to the sludge reservoir side, and comprises a plurality of scraping plates provided with a predetermined mounting interval therebetween. And a slant plate separator provided in the sedimentation basin, and a drive unit provided in the mud collector that reciprocates the mud collector at least by a mounting interval of the scratching plate. . Further, a scum removing machine is provided in the sedimentation basin. The drive unit is provided outside the settling basin, and is connected to the mud collector via a seal member provided on the tank wall of the settling basin. Further, the drive unit is provided on the tank wall of the sedimentation basin or an extension of the tank wall, and is connected to the mud collector via a link mechanism.

[0011]

In the above structure, the cross-sectional shape is vertical on the sludge storage side, and the side opposite to the sludge storage side has a downwardly inclined surface,
And when the mud collector consisting of a plurality of scraping plates provided at a predetermined mounting interval from each other is reciprocated by the drive unit,
The sludge accumulated on the bottom of the sedimentation pond moves to the sludge reservoir.

[0012]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a schematic configuration of a precipitation separation device according to an embodiment.

The sedimentation basin 1 is on one end side (left side in the illustrated example)
Has a raw water receiving tank 2 for receiving raw water such as sewage, and has the shape of a well-known cross-flow type sedimentation basin in which the treated water is discharged to the other end through a trough of an inclined plate separator described later.

The raw water receiving tank 2 has a dispersion plate 2a made of a perforated plate and a straightening plate 2b so as to uniformly disperse the received raw water into the settling tank 3 located on the right side.

The bottom surface 1a of the settling basin 1 is formed into a substantially horizontal flat surface, and the raw water receiving tank 2 side of the bottom surface 1a is formed into a concave shape and provided with a sludge reservoir 4.

The mud collector 5 is movably mounted on the bottom surface 1a, and comprises a plurality of scraping plates 5a, 5a, ... Like the well-known scraper plate, the scraper plate 5a has a length substantially equal to the width direction of the settling basin 1 (the direction orthogonal to the direction in which the raw water flows) and its cross-sectional shape (the direction in which the raw water flows). As shown in the figure, the cross-sectional shape in the parallel and vertical directions is such that the sludge reservoir 4 side is vertical and the sludge reservoir 4
The opposite side has a triangular shape with a downward slope. Then, each of the draw plates 5a, 5a ... Is connected to the connecting member 5b.
Are integrated through the above to form the mud collector 5.

The right end side of the mud collector 5 (in the illustrated example, the treated water extraction side) is connected to a hydraulic cylinder 6 which is provided outside the settling tank 1 and forms a part of the drive unit of the present invention. That is, the drive rod 6a side of the hydraulic cylinder 6 is connected to the connecting member 5b via the well-known seal member 7 provided on the side wall 1b of the sedimentation tank 1.

The amount of reciprocal movement of the drive rod 6a of the hydraulic cylinder 6 is determined so as to be at least equal to or greater than the mounting interval of the scraping plate 5a.

Therefore, when the hydraulic cylinder 6 is driven, the mud collector 5 moves in the left-right direction on the bottom surface 1a as shown by the arrow in FIG. 1, and the vertical side of the scraping plate 5a is closer to the inclined surface side. Also, since the sludge accumulated on the bottom surface 1a has a large resistance, the sludge accumulated on the bottom surface 1a can be moved to the sludge reservoir 4.

The inclined plate separator 8 is a mud collector 5 in the settling tank 2.
It consists of a well-known structure placed above the
It has a large number of inclined plates 8a, 8a ...
If the inclination angle is in this range, a wide range of sludge can be dealt with, and the amount of sludge accumulated on the inclined plates 8a, 8a ... Can be reduced. The inclined plate separator 8 is provided with treated water outlets 8b, 8b, ... Above the inclined plate separator 8 so that the treated water flowing out of the inclined plate separator 8 is discharged to the outside of the settling tank 3 through the trough 9. ing.

The scum removing machine 10 has a well-known structure which is arranged near the water surface above the sludge reservoir 4 in the settling tank 3, and a plurality of scrapers 1 are provided on the endless belt 10a at predetermined intervals.
It has a structure having 0b, 10b .... The endless belt 10a is configured so that the scrapers 10b, 10b, ... (Scrapers 10b, 10b, located on the lower side) on the side of scraping the scum move to the raw water supply side by a motor (not shown).

In the apparatus of this embodiment having the above structure, when raw water is supplied from the raw water receiving tank 2 into the settling tank 3, the sedimentable impurities in the raw water are deposited on the bottom surface and the floating impurities are removed. Ascend above the surface of the water.

Scum, which is an impurity floating on the water surface,
After being collected in the scum reservoir 11 by the scum remover 10,
Processing such as dehydration and incineration is performed.

When the raw water in the settling tank 3 passes through the inclined plate separator 8, it further separates sedimentable impurities and is discharged as treated water through the treated water take-out section 8b and the trough 9.

The sludge separated by the settling tank 3 and the inclined plate separator 8 and deposited on the bottom surface 1a is collected in the sludge reservoir 4 as the hydraulic cylinder 6 reciprocates as described above. Then, the sludge in the sludge reservoir 4 is discharged from here and subjected to a predetermined sludge treatment such as dehydration treatment.

As described above, the device of this embodiment is used in the mud collector 5
Since there is no mechanism for driving the
The slant plate separator 8 or the scum remover 10 is not obstructed when installed, and the mud collector 5 can be directly operated by the reciprocating motion of the hydraulic cylinder 6.

FIG. 2 shows another example for driving the mud collector 5, in which the hydraulic cylinder 6 is submerged in the tank wall 1b of the settling tank 1.

That is, the drive rod 6 of the hydraulic cylinder 6
“A” faces downward, and the other end is rotatably connected to one end of the L-shaped link member 12 that corresponds to the link mechanism of the present invention. The intersection of both sides of the L-shaped link member 12 is a frame F provided on the tank wall 1b.
Is rotatably provided on the support shaft 12a, and the other end of the link member 12 is movably connected to one end of the mud collector 5.

Therefore, when the hydraulic cylinder 6 is driven and the drive rod 6a moves up and down, the mud collector 5 can reciprocate in the left-right direction, as in FIG.

As described above, when the hydraulic cylinder 6 is provided on the tank wall 1b of the settling basin, since the hole penetrating the tank wall 1b is not required, the sealing member 7 is not required.

In the above embodiment, the inclined plate separator 8 is used.
The inclined plates 8a, 8a, ... are merely flat plates inclined, but they may be other types of inclined plates such as the Uno type inclined plate in which the inclined plates are arranged in a dogleg shape.

Further, in the above-mentioned embodiment, the sludge reservoir 4 side of the scraping plate 5a has a vertical shape, but it is curved to the side opposite to the sludge reservoir 4 side to increase the movement amount of sludge. Alternatively, the slanted surface may be a curved surface that is slightly raised upward to reduce the amount of reverse movement of sludge when the mud collector 5 is returned. Therefore, the scraping board 5 of the present invention
The vertical or inclined surface of a also includes a curved surface or a curved surface.

Further, in the above-described embodiment, the hydraulic cylinder is used as the drive unit, but a drive unit such as an air cylinder or a motor may be used.

[0034]

EFFECTS OF THE INVENTION The sedimentation separation device according to the present invention has a flat bottom surface and a sedimentation tank having a sludge reservoir in which a part of the bottom surface is formed in a concave shape, and the cross-sectional shape is vertical on the sludge reservoir side, A sludge collector comprising a plurality of scraper plates having a downward inclined surface on the side opposite to the sludge accumulating side and provided with a predetermined mounting interval therebetween, and at least the scraper plate is provided with the scraper plate. Since it consists of a drive unit provided on one side of the mud collector that reciprocates for the mounting interval of, the mechanism that drives the mud collector has the feature that it does not hinder the placement of inclined plate separators, etc. is there.

When the drive unit is provided outside the sedimentation basin and is connected to the mud collector through the sealing member provided on the tank wall of the sedimentation basin, the drive unit can directly and efficiently drive the reciprocating motion. You can

Further, when the drive unit is provided on the tank wall of the settling basin or an extension of the tank wall and is connected to the mud collector through the link mechanism, there is a feature that no seal member is required.

[Brief description of drawings]

FIG. 1 is a sectional view showing a schematic configuration of a device according to an embodiment of the present invention.

FIG. 2 is a front view showing another drive mechanism of the mud collector.

[Explanation of symbols]

 1 settling basin 1a bottom 1b tank wall 2 raw water receiving tank 3 settling tank 4 sludge reservoir 5 mud collector 5a scraping plate 5b connecting member 6 hydraulic cylinder 6a drive rod 7 seal member 8 inclined plate separator 9 trough 10 scum remover

Claims (4)

[Claims] 1. A sedimentation basin having a flat bottom surface and a sludge reservoir in which a part of the bottom surface is formed in a concave shape; and a cross-sectional shape in which the sludge reservoir side is vertical and the side opposite to the sludge reservoir side is downward. A mud collector consisting of a plurality of scraping plates having an inclined surface and provided with a predetermined mounting distance from each other, and a collection device that reciprocates the mud collector at least a distance corresponding to the mounting distance of the scraping plates. A settling separation apparatus comprising: a drive unit provided in the mud machine; and a slant plate separator provided in the settling basin. 2. The precipitation separating apparatus according to claim 1, wherein a scum removing machine is provided in the sedimentation basin. 3. The drive unit is provided outside the settling basin,
2. The mud collector is connected via a seal member provided on the tank wall of the settling basin.
Alternatively, the precipitation separator according to item 2. 4. The drive unit is provided on the tank wall of the sedimentation pond or on an extension of the tank wall, and is connected to the mud collector via a link mechanism. The described precipitation separator.