JP3961075B2 - Efficient removal device for scum in circular sedimentation basin. - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an efficient removal device for scum in a circular sedimentation basin, and in particular, to a water surface by a water flow generated by a circular motion of a scum scraper at the water surface position of the circular sedimentation basin and a sludge scraping flight supported suspended from the bottom of the pond. The present invention relates to an apparatus for efficiently removing scum in a circular sedimentation basin in which floating scum is prevented from being rotated and reliably collected and eliminated by a scum scraper.
[0002]
[Prior art]
Conventionally, in a circular sedimentation basin, a solid sediment such as sludge and sludge that settles on the bottom of the pond and a scum floating on the water surface are separated and removed. A swarm scraper is attached to this arm, and a sludge scraping flight is suspended from the scraper via the hanging rope to the bottom of the pond, and the scraper and sludge scraping flight are supported. Both are turning around in the pond.
[0003]
[Problems to be solved by the invention]
In the conventional scum removal device in the circular sedimentation basin, when the scum scraper supported by the arm located at the surface of the water is swung, the sludge scraping flight on the pond bottom suspended and supported by the scum scraper also swivels in the same direction. I do. In this case, the rotation speed of the arm, which is determined by the sludge scraping speed, is slow. Therefore, even if the scum scraper is rotated at the same speed, a water flow in a certain direction is generated in the circular sedimentation basin. There was a problem that it could not be swung around with a scum scraper.
The present invention solves the problems of the above-described conventional apparatus for efficiently removing scum in a circular sedimentation basin, and generates a water flow in the direction opposite to the movement of the snooper using the rotation of the arm to which the scum scraper is attached as a power source. An object of the present invention is to provide an apparatus for efficiently removing scum in a circular sedimentation basin in which a paddle rotating in a direction is provided, and thereby scum can be collected and removed more actively by a scraper.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, an apparatus for efficiently removing scum in a circular sedimentation basin according to the present invention includes a scum scraper provided in the circular sedimentation basin so as to be rotated by a driving device, and a scum scraper suspended from this scraper. It consists of a swirling sludge scraping flight and a paddle that is supported by a mounting arm of a scum scraper and that rotates so that a water flow in the direction opposite to the direction of the water flow generated by the scum scraper is generated. The scum floating on the water surface is collected while being prevented from being swung by the scum scraper.
[0005]
An apparatus for efficiently removing scum in the circular sedimentation basin of the present invention having the above-described configuration includes a scum scraper suspended from an arm, a scum that floats on the water surface by swirling a sludge scraping flight at the bottom of the pond, When the sediment settled on the surface is scraped and discharged, floating scum is caused by the water flow generated by this scum scraper, but the paddle shaft with the paddle placed on the water surface is rotated by the scum scraper. Since the floating scum is prevented from being rotated by the water flow in the direction opposite to the traveling direction of the scum scraper generated by the rotation of the paddle, the floating scum can be reliably scraped and discharged.
[0006]
In this case, when the scum is collected by the rotation of the scum scraper, the scum scraper and the paddle can be angled in the direction in which the scum flows in the outer circumferential direction of the circular sedimentation basin.
[0007]
The efficient removal device of the scum in the circular sedimentation basin of the present invention having the above-described configuration is configured such that both the scum scraper and the paddle are angled in the direction in which the scum flows in the outer circumferential direction, and therefore floats by the rotation of the scraper and the paddle. The scum naturally flows to the scum discharge trough in the outer peripheral direction of the circular sedimentation basin, and the scum can be easily discharged.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an apparatus for efficiently removing scum in a circular sedimentation basin of the present invention will be described below with reference to the drawings.
In the figure, reference numeral 1 denotes a circular sedimentation basin having a required shape and capacity. A sludge pit 2 is arranged in the center of the bottom of the circular sedimentation basin 1, and the sludge scraping flight is rotated by sludge settled on the pond bottom. So that it can be collected in the sludge pit and discharged outside the pond.
[0009]
In addition, a gantry 3 is disposed above the circular sedimentation basin 1, and a driving device 4 including a motor and a speed reducer is provided on the gantry 3 so that the arm 6 attached to the turning shaft 5 of the driving device is kept horizontal. While turning at a predetermined speed, the scum scraper 8 is suspended from and supported by the lower surface of the arm via the fixture 7 at a substantially water surface position. A bracket 9 is attached to the lower end of the arm so that the arm smoothly and accurately turns at the upper end of the circular sedimentation basin. The bracket is provided with an arm support wheel 11 and is supported by the rail mounting base 22 on the inner peripheral surface of the circular sedimentation basin. When the arm 6 turns, the arm support wheel 11 rolls so that the paddle shaft directly connected to the wheel rotates in synchronization.
[0010]
The paddle shaft 10 rotatably supported by the bracket has a specified length, and a plurality of paddles 12, 12, 12 are provided on the paddle shaft by changing their mounting angles and positions, and an arm is provided. When turning along the rail, the arm support wheel slides on the rail, thereby generating a water flow in a flow direction opposite to the turning direction of the arm and the scum scraper, so that the scum floating on the water surface is removed from the scum scraper. Prevents swirling by the direction of water flow caused by swirling and ensures collection by a scum scraper.
[0011]
The arm provided with the scum scraper hangs a plurality of ropes 13 and 13 and fastens the lower end of the rope to the sludge scraping flight 14 to support the sludge scraping flight 14 on the pond bottom, A guide roller 15 is projected from the tip of the sludge scraping flight 14, and the guided roller is brought into contact with the inner peripheral surface of the circular sedimentation basin, and when the arm turns, the sludge scraping flight is performed via the rope. 14 turns precisely at the bottom of the pond so that the sludge deposited on the bottom of the pond is scraped into the sludge pit.
[0012]
In addition, a sewage supply pipe 16 is disposed in the center of the circular sedimentation basin, and a rectified water supply pipe cylinder 17 is disposed at the upper end of the water supply pipe 16 so that the sewage is made uniform in the circular sedimentation basin and flows toward the bottom of the pond. The treated water after removing the scum and sludge is discharged from an overflow trough 19 disposed on the inner peripheral surface of the circular sedimentation basin. The scum is scraped and discharged by a scum scraper from a scum box 20 arranged on the inner peripheral surface of the circular sedimentation basin. Reference numeral 21 denotes a discharge pipe disposed in the scum box.
[0013]
Accordingly, in the efficient scum removal device in the circular sedimentation basin configured as described above, when the arm 6 is driven to rotate by the drive device 4, the sludge suspended and supported by the scum scraper 8 and the rope 13 attached thereto. The scraping flight 14 also rotates. A water flow is generated on the surface of the scum scraper 8 in the direction of travel of the scum scraper. A paddle shaft 10 attached to an arm support wheel that rolls on the rail is also rotated on this arm. The paddle shaft is rotated by a plurality of paddles so that a water flow in a direction opposite to the direction of the water flow generated by the traveling direction of the scum scraper is generated. The floating scum is easily collected by the scum scraper. Moreover, since the angle of the paddle and scum scraper is moved in the outer peripheral direction, the floating scum is easily transferred to the scum box side and collected and discharged.
[0014]
【The invention's effect】
According to the apparatus for efficiently removing scum in the circular sedimentation basin of the present invention, the scum scraper suspended from the arm and the scum floating on the water surface by the swirling of the sludge scraping flight at the bottom of the pond, settled on the pond bottom. When the sediment is scraped and discharged, it is possible to prevent the floating scum from being swung by the water flow generated by this scum scraper by the water flow in the direction opposite to the traveling direction of the scum scraper generated by the rotation of the paddle placed on the water surface. Therefore, the floating scum can be scraped and discharged reliably.
[0015]
According to the apparatus for efficiently removing scum in the circular sedimentation basin described in claim 2 of the present invention, the scum scraper and the paddle are angled in the direction in which the scum flows in the outer circumferential direction of the circular sedimentation basin. Therefore, the scum is reliably collected in the direction of the outer circumferential surface of the circular sedimentation basin by the rotation of the scum scraper, and can be reliably discharged from the scum box.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a first embodiment of an apparatus for efficiently removing scum in a circular sedimentation basin according to the present invention.
FIG. 2 is a plan view of an apparatus for efficiently removing scum in a circular sedimentation basin according to the present invention.
FIG. 3 is an enlarged explanatory view of the main part.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Circular sedimentation basin 2 Sludge pit 4 Drive device 6 Arm 8 Scum scraper 10 Paddle shaft 11 Arm support wheel 12 Paddle 13 Strip 14 Flight for sludge scraping 20 Scum box

Claims (2)

The scum scraper provided in the circular sedimentation basin to be rotated by the drive unit, the sludge scraping flight suspended from the scraper and swirling with the scum scraper, and the arm for mounting the scum scraper are supported. The scum scraper is used to collect the scum that floats on the surface of the water while preventing it from being swung by the scum scraper. Efficient scum removal device in a circular sedimentation basin. The circular sedimentation basin according to claim 1, wherein the scum scraper and the paddle are angled in a direction in which the scum flows in the outer circumferential direction of the circular sedimentation basin when the scum is collected by rotation of the scum scraper. Efficient removal device for scum.

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