JP4015576B2 - Scum raking discharge device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a scum scraping and discharging device, and more particularly, to a scum scraping and discharging device in which floating scum in a sedimentation basin is not stagnation at a water surface position, but is reliably raked up and discharged with a reduced amount of drainage. Is.
[0002]
[Prior art]
Conventionally, in a chain flight type sludge scraper installed in a sedimentation basin facility, when the flight moves forward, the sludge settled on the bottom of the tank is scraped to the sludge pit side, and the return side of the water surface position is When moving, the scum floating on the water surface is sent to the vicinity of the scum skimmer by the flight, the scum skimmer is tilted, and the scum is discharged together by the swallowing water flow by the scum skimmer.
[0003]
[Problems to be solved by the invention]
By the way, when the scum is scraped and discharged by the flight of the conventional chain flight sludge scraper, the scum floating on the water surface scraped to the scum skimmer side is discharged by the stagnation water flow generated by tilting the scum skimmer. Therefore, depending on the size of the scum and the squeezing flow rate, the scum may not be completely discharged and may stay in the scraped area, and it is necessary to remove the retained scum. However, there is a problem that the amount of water swallowed becomes large due to the tilting time of the scum skimmer, and this large amount of drainage and scum need to be separated.
[0004]
In view of the problems of the above-described conventional scum scooping and discharging apparatus, the present invention can reliably squeeze and lift up the floating scum in the settling basin at the water surface position, and discharge the scum while reducing the amount of drainage. An object of the present invention is to provide a scum scooping and discharging device.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a scum scraping and discharging apparatus according to the present invention is a scum scraping and discharging apparatus attached to a sludge scraping machine driven by a driving device configured to reciprocate. When the flight moves forward, the scum scooping flight placed on the scum scooping arm attached to the tip of the scum scavenging flight beam that has scum scavenging flight scratches the scum on the water surface. The scum is moved on the scum scooping guide plate inclined upward, and the scum scraped is discharged to the scum discharge trough.
[0006]
This scum scooping / discharging device is a scum disposed on a scum scavenging arm swingably attached to the tip of a scum scavenging flight beam on which the scum scavenging flight is disposed when the scum scavenging flight advances. The scraping flight is configured to move upward on the scum scooping guide plate inclined upward while discharging the scum on the water surface, and to discharge the scraped scum to the scum discharge trough. The scum and the sewage are separated from each other at a position protruding from the water surface, and only the scum and a small amount of the sewage adhering to the scum are discharged to the scum discharge trough disposed adjacent to the proximal end side of the scum raising guide plate.
[0007]
In this case, a stopper that positions the lower end position of the scum scraping flight below the water surface and above the tip position of the scum scraping guide plate at the advance start position of the scum scraping flight may be provided. it can.
[0008]
As a result, the scum cleaning flight always moves along the scum cleaning guide plate surface only by moving the scum cleaning flight back and forth, and the structure of the scum cleaning floating on the water surface is simplified. The top removal can be performed reliably.
[0009]
Further, the scum lifting arm provided with the scum lifting flight can be configured to swing by the inclination of the scum lifting guide plate and the weight of the scum lifting arm.
[0010]
As a result, the scum lifting arm provided with the scum lifting flight can be swung without providing a driving source, and the mechanism can be simplified.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a scum scraping and discharging apparatus according to the present invention will be described below with reference to the drawings.
[0012]
1 to 3 show an embodiment of the scum scooping and discharging apparatus of the present invention.
As a sedimentation basin facility, it was attached to the sludge scraper K installed in the sedimentation basin 1, and a drive device M was used as a drive device for the sludge scraper K, and was arranged at the bottom of the tank by the drive of the drive device M. The sludge scraping flight F and the scum scraping device A disposed on the water surface are configured to reciprocate and to be driven simultaneously.
The driving device M is a reciprocating motion that combines a reciprocating motion that reciprocates a predetermined distance L along the longitudinal direction of the settling basin 1 and a vertical motion that moves up and down a predetermined height H following the reciprocating motion. For example, as shown in FIGS. 4 and 5, the water surface in front of the central portion of the sewage treatment tank 1, that is, on the sludge pit P side, is configured. An inner guide rail 51 disposed substantially horizontally on the main body frame 5 installed above, a number of pin racks 52 projecting at equal intervals from the center of the inner guide rail 51, and a long length so as to surround the outer periphery of the inner guide rail 51 An elliptical guide rail 50 composed of a circular outer guide rail 53 and a pin rack 52 meshed with the inner guide rail 51 and the outer guide rail 53 and circulated along the guide rail 50. The pinwheel 54 is driven by a pinwheel 54 that moves (substantially rectangular motion) and a motor 56 that is attached to the shaft 55 of the pinwheel 54. Further, the scum scraper A and the sludge scraper K are suspended from the shaft 55. It is driven while being supported by being suspended by a support rod 57.
[0013]
Then, the sludge scraping flight F is moved by the driving device M in combination with movement along the tank bottom and raising and lowering, and the sludge scraping flight F is directed toward the sludge pit P side. When moving, scrape the precipitated sludge, and when returning, raise the sludge scraping flight F by a height H from the bottom of the tank so as not to scrape the precipitated sludge to the anti-pit side. When the sludge scraping flight F moves on the return path by driving, the scum scraping flight disposed in the scum scraping device A is swung so as to rise, and the scum floating on the water surface is swept away by the scum discharge trough 3. When squeezing and discharging to the side and moving on the return path side, the scum scraping flight is allowed to sink below the water surface.
[0014]
The scum scraping and discharging device B of the present invention is attached to the scum scraping device A.
As shown in FIGS. 1 and 2, the scum scooping and discharging device B is driven by a driving device M configured to reciprocate, and a plurality of scum scavenging flights 21 are arranged at regular intervals. A scum scooping arm 24 is supported at the front end of the flight beam 2 for scraping the scum through a pivot 23 supported by the bracket 22 so as to protrude forward of the flight beam 2 and swing in the vertical direction. The scum scooping flight 25 is attached to the tip of the scum scooping arm 24, and further, the scum scavenging arm 24 is attached to the tip of the flight beam 2. A stopper 26 is provided so as to protrude so that the end surface does not fall below the position of the guide plate 4 for raising the scum.
[0015]
The scum scooping guide plate 4 is scraped and collected by the scum scavenging flight 21 and is inclined so that the scum floating on the water surface in the vicinity of the scum discharge trough 3 can be scraped up and discharged to the scum discharge trough 3. The scum is disposed adjacent to the base end side of the guide plate 4 for scum scuffing, and is inclined so that the base end side is below the water surface and the base end side is slightly above the water surface. It is arranged so as to be connected to the discharge trough 3.
As a result, the scum scraped up on the scum raising guide plate 4 by the scum raising flight 25 is naturally discharged into the scum discharge trough 3 from the base edge of the scum raising guide plate 4. Like that.
[0016]
The distal end side of the scum raising guide plate 4 is in a position slightly sinking from the water surface, and the proximal end side is placed higher than the water surface, so that the scum that floats on the water surface becomes a scum raising flight 25. As a result of the forward movement and the swinging motion of the scum, the scum is surely scraped up onto the scum raising guide plate 4 together with the sewage, and the sewage flows down when moving along the inclined upper surface of the scum raising guide plate 4 with the scum. Thus, the sewage and the scum are separated so as to return to the original sedimentation basin 1, and only the scum and a small amount of the sewage adhering to the scum are slid and moved on the scum cleaning guide plate. Then, the scum scooping guide plate 4 is dropped and discharged from the base edge of the scum scooping guide plate 4 into the scum discharge trough 3 disposed adjacent to the scum scooping guide plate 4.
At the most advanced position of the scum cleaning flight 25, as shown by the chain line in FIG. 1, the scum cleaning flight 25 reaches the base edge position of the scum cleaning guide plate 4, Thus, the scum scraped up on the scum raising guide plate 4 is surely dropped and discharged into the scum discharge trough 3.
[0017]
【The invention's effect】
According to the scum scooping and discharging apparatus of the present invention, when the scum scavenging flight moves forward, the scum scooping arm is swingably attached to the tip of the scum scavenging flight beam on which the scum scavenging flight is arranged. The scum scooping flight arranged on the scum moves upward on the scum scooping guide plate while scraping the scum on the water surface, and discharges the scum scraped up to the scum discharge trough. Therefore, the scum and sewage are separated from the surface of the water, and only a small amount of sewage adhering to the scum and scum is discharged to the scum discharge trough disposed adjacent to the base end side of the scum lifting guide plate. Therefore, by simply moving the scum scooping flight forward and backward, the scum that has been raked up is forcibly discharged and the scum staying is eliminated, eliminating the need to remove the staying scum. Maintenance and management becomes easy.
In addition, since the scum can be discharged with a reduced amount of drainage, post-treatment of the collected scum is simplified.
[0018]
In addition, by providing a stopper that positions the lower end position of the scum cleaning flight below the water surface and above the tip position of the scum cleaning guide plate at the advance start position of the scum cleaning flight, By simply moving the scooping flight forward and backward, the scum scooping flight always moves along the surface of the scum scooping guide plate, simplifying the structure and ensuring the removal of the scum that floats on the water surface. Can be done.
[0019]
Further, the scum lifting arm provided with the scum lifting flight is configured to swing by the inclination of the scum lifting guide plate and the weight of the scum lifting arm, thereby providing a drive source in particular. The scum lifting arm provided with the scum lifting flight can be swung without any problems, and the mechanism can be simplified.
[Brief description of the drawings]
FIG. 1 is a front view showing one embodiment of a scum scraping and discharging apparatus according to the present invention.
FIG. 2 is a plan view of the same.
FIG. 3 is a front longitudinal sectional view showing the entire sedimentation basin in which the scum scraping and discharging device is disposed.
FIG. 4 is a side longitudinal sectional view of a driving device.
FIG. 5 is a front view of the same.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sedimentation basin 2 Scum scraping flight beam 21 Scum scraping flight 22 Bracket 23 Axis 24 Scum scraping arm 25 Scum scraping flight 26 Stopper 3 Scum discharge trough 4 Scum scraping guide plate A Scum scraping device B Scum scooping discharge device M Drive device F Sludge scraping flight S Scum scraping device K Sludge scraping machine P Sludge pit

Claims (3)

In a scum scraping and discharging device attached to a sludge scraper driven by a driving device configured to reciprocate, when the scum scraping flight moves forward, the scum scraping flight is arranged. The scum scooping flight arranged on the scum scooping arm attached to the tip of the flight beam for swinging moves on the scum scooping guide plate inclined upward while scrambling the scum on the water surface. The scum scooping and discharging device is configured to discharge the scraped scum to a scum discharging trough. A stopper is provided for positioning so that the lower end position of the scum cleaning flight is below the water surface and above the tip position of the scum cleaning guide plate at the advance start position of the scum cleaning flight. The scum scraping and discharging apparatus according to claim 1. 3. The scum scooping arm provided with the scum scooping flight is configured to swing by the inclination of the scum scooping guide plate and the own weight of the scum scooping arm. The scum scooping discharge device as described.

Images