JPS6159193B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a traveling type floating sludge removal device in a rectangular flotation separation tank such as a pressurized flotation tank.

To scrape sludge in this type of flotation tank, a flight conveyor type device in which a large number of scraping plates are attached to an endless chain has been mainly used. However, with this kind of equipment, the floating sludge is disturbed by the movement of the scraping plate and dispersed into small pieces, and some of the floating sludge often loses air bubbles during transfer and settles, making it difficult to remove the sludge sufficiently. The disadvantage is that it is not done.

This invention was made with the aim of solving the above-mentioned drawbacks of the conventional method.A screw conveyor and a sludge intake gutter were installed between the screw conveyor and the sludge conveyor on a traveling frame that reciprocated the flotation tank, and when the traveling frame reciprocated, A pair of sludge intake gutters are placed alternately under the water surface to scoop up the floating sludge and conveyed to a trough provided in the flotation tank by a screw conveyor for discharge, while the other sludge intake gutter is lifted above the water surface. The purpose of the present invention is to provide a removal device with excellent floating sludge removal efficiency.

Embodiments of the present invention will be described below with reference to the drawings.

In Figs. 1 and 2, reference numeral 1 denotes a flotation tank having a rectangular planar shape, and troughs 2a and 2b for discharging sludge are provided along the longitudinal direction on both sides of the tank. Rails 3, 3 are laid. Reference numeral 4 denotes a running frame installed over the flotation tank 1, which is mounted on the rails 3, 3 via wheels 5, 5 provided on both sides of the frame, and moves over the flotation tank 1 along the rails 3, 3. is reciprocated by a traveling drive device 6.

Support rods 7, 7 are vertically installed on both sides of the traveling frame 4, and a screw conveyor 13 with successively smaller diameters at both ends is mounted on the support rods 7, 7, and one end of its rotating shaft 12 A transmission wheel 14 is attached to the section and is rotated by a screw drive device 15 mounted on the traveling frame 4. A pair of sludge intake troughs 8a, 8b having an arcuate cross section are arranged opposite to each other, sandwiching the screw conveyor 13, and are connected to each other by connecting plates 17, 17 at their upper edges. , and both ends are swingably mounted via guide plates 9, 9, and piston rods 11, 11 of cylinders 10, 10 swingably mounted on the traveling frame 4 are mounted on the connecting plates 17, 17. are connected to each other, and both sludge intake troughs 8a, 8b are integrally swung and fixed in a predetermined position by the expansion and contraction movements of the piston rods 11, 11.

Both sides of the sludge intake troughs 8a and 8b are formed with ascending slopes 8n and 8n that gradually become smaller diameters toward the trough 2, which is slightly higher than the water surface a, and each end thereof is connected to the trough 2. In addition, at one end of one sludge intake gutter 8a, there is an in-trough scraping plate 16a facing into one trough 2a.
However, at the other end of the other sludge intake gutter 8b, an in-trough scraping board 1b is vertically installed toward the inside of the other trough 2b when the lower edge thereof is submerged in water. ing.

Next, the operation of the floating sludge removal apparatus configured as described above will be explained.

The traveling platform 4 is reciprocated on the flotation tank 1 along the rails 3, 3 by the driving of the traveling drive device 6. During forward movement, the cylinder 10 is actuated as shown in FIGS. 2 and 3. The lower edge of one sludge intake gutter 8a is held under the water surface via the connecting plate 17 at the intake position. In this case, the other sludge intake gutter 8b facing this is in an idle position with its entirety exposed above the water surface. Then, the screw conveyor 1 is driven by the screw drive device 15.
3 is rotated in the normal direction so that it can be transported toward the trough 2a on one side. As a result, the floating sludge is scooped out by one sludge intake gutter 8a, and the sludge is transferred to the sludge intake gutter 8a by the screw conveyor 13.
It is transported through the interior, pushed up the upward slope portion 8n, and falls into the trough 2a on one side. The sludge that has entered the trough 2a is then transferred to the sludge intake gutter 8.
It is pushed by the in-trough scraping plate 16a hanging from the trough and collected toward one end of the trough, and is discharged from there to the outside of the tank through an outlet (not shown).

When the traveling frame 4 completes its forward movement and returns, it operates the cylinder 10 to swing the sludge intake troughs 8a and 8b, as shown in FIG. The lower edge of the intake gutter 8b is held at the intake position below the water surface. As a result, one sludge intake gutter 8a is entirely exposed above the water surface and becomes idle. Also, due to such a change in position, the trough scraping plate 8a of one sludge intake gutter 8a is pulled up from inside the trough 2a, and on the contrary, the other trough scraping plate 8a is pulled up from the other end. It will be suspended within the trough 2b. During this return movement, the screw conveyor 13 rotates in the opposite direction, that is, the screw conveyor 13 rotates in the opposite direction.
Rotate it in a direction that allows it to be transported toward b. The sludge that has been conveyed through the sludge intake gutter 8b and entered the trough 2b via the upward slope section 8n is transferred to the trough in-trough scraping plate 16b.
As a result, it is collected at the end of the trough and is discharged outside the machine as described above.

In this way, the traveling frame 4 repeats reciprocating motion,
During both of these reciprocating movements, the pair of sludge intake troughs 8a and 8b are oscillated and repositioned to take in and discharge sludge, and the floated sludge in the flotation tank 1 is successively removed. It is.

In the embodiment described above, the rotation of the screw conveyor 13 is performed by a drive device 15 that is separate from the movement of the traveling frame 4. You can also do it with In addition, sludge intake gutter 8a, 8b
The switching operation between the intake position and the idle position is performed by a cylinder mechanism, but this is not limited to this, and other means may be used, for example, by providing a transmission wheel or the like at the ends of the pair of sludge intake gutters 8a and 8b. It is also possible to use an appropriate drive device. Furthermore, if the troughs 2a and 2b are formed to become deeper toward the end where the sludge discharge port is located, the sludge that has entered the troughs 2a and 2b will naturally flow down. The scraping plates 16a and 16b can also be omitted.

As explained above, the floating sludge of this invention is
A screw conveyor and a pair of sludge intake gutters are installed on a traveling platform that reciprocates the flotation tank, and a pair of sludge intake gutters are installed between the screw conveyor and this, and as the traveling platform reciprocates, the pair of sludge intake gutters are placed alternately under the water surface to scoop up the floating sludge. The screw conveyor transports the sludge into a trough provided in the flotation tank and discharges it, making it possible to take in and discharge the sludge efficiently without disturbing the floated sludge. It has many excellent effects, such as preventing the settling of sludge due to the disappearance of sludge, significantly increasing the removal efficiency of floating sludge, and having a relatively simple and economical structure.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view showing an embodiment of the device of the present invention, Fig. 2 is an enlarged side sectional view of the main parts, Figs. The figure shows the state during forward movement, and FIG. 4 shows the state during backward movement. 1...Flotation tank, 2a, 2b...Trough, 3...Rail, 4...Traveling frame, 5...Wheel, 7...Support rod, 8
a, 8b...Sludge intake gutter, 10...Cylinder, 13...
Screw conveyor, 16a, 16b... trough internal scraping board, 17... connecting plate.

Claims (1)

[Claims] 1. A flotation tank with sludge troughs provided on both inner sides is provided with a traveling platform that reciprocates across the tank, and a screw conveyor is installed on the traveling platform between the opposing troughs of the flotation tank, A pair of sludge intake gutters are provided sandwiching the screw conveyor, and each of these sludge intake gutters has its end facing each trough, and the lower part of one of the sludge intake gutters is at an intake position submerged in water. 1. A device for removing floating sludge, characterized in that when the sludge intake gutter is in an idle position, the other sludge intake gutter can be alternately adjusted to swing so that it is in an idle position exposed above the water surface.