JPH0256205A - Sludge discharge device for sludge settling tank - Google Patents

Abstract

PURPOSE:To discharge settled sludge in a sludge settling tank in a short time under low moving resistance conditions by hanging a pump for sucking up the settled sludge in the sludge settling tank from a traveling device reciprocating above the sludge settling tank. CONSTITUTION:The settled sludge A in the sludge settling tank 10 is sucked up by the sludge suction pump 2 hung from the traveling device 1, and discharged to the outside. In this case, since only the relatively small suction pump 2 is hung into water, the pump 2 can be moved against the low moving resistance, hence the speed of the traveling device 1 can be increased, and the traveling device 1 can be traveled with a low power. In addition, since the traveling direction of the traveling device 1 horizontally transverses the moving direction of the pump 2 by a driving device 3, the sludge can be sucked up while meandering the pump 2 by automatic control, and the sludge can be continuously discharged from the whole region in the settling tank 10.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sludge discharge device for a sludge settling tank for discharging settled sludge in the sludge settling tank to the outside.

(Prior Art) As a sludge discharge device for discharging 1lSl:# sludge accumulated in a sludge settling tank to the outside, a device as shown in FIGS. 3 and 4 has been generally used. The conventional sludge discharge device shown in FIGS. 3 and 4 removes the settled sludge A accumulated on the entire bottom + 108 surface of the sludge 1tf IQ tank 110 in the longitudinal direction (arrow P
-Q direction) A sludge scraping device Y for scraping sludge toward the sludge pool 21 side provided at the bottom of one end, and the sludge pool 111
It is equipped with a sludge pump 102 for discharging to the outside the sludge #t'5 sludge A that has been collected inside. The sludge scraping device Y is configured by suspending a scraper blade 121 by a wire 103 from a motor-driven traveling device [01] that can travel above the sludge settling tank 110 in the direction inside the sludge settling tank. The scraper blade 121 has a relatively large area that is slightly shorter than the interval in the width direction within the sludge settling tank 110 and has a predetermined height.

This sludge scraping device Y positions the traveling device 101 at the end of the anti-old sludge pool 111 side (the end of the arrow P side) of the sludge settling tank 110, and from there the scraper blade 12
1 until it reaches the tank bottom 110a, slowly move the traveling device 101 toward the sludge pool 111 (arrow Q
By moving the precipitated sludge A toward the sludge pool 111 side, the scraper blade 121 can collect the settled sludge A toward the sludge pool 111 side. In addition, at the same time as the sludge collection work by this sludge collection device Y, the sludge pump 102 is operated to place the sludge A collected in the sludge pool part ill outside the sludge settling tank. By pumping out the inside of the sludge tank [20], the settled sludge A in the sludge settling tank 110 can be discharged to the outside.

However, in such a conventional sludge scraping and accumulation type sludge discharge device, during the F8 sludge scraping operation by the sludge scraping device Y, the scraper blade 121 has a large area, so movement resistance (sedimentation) against the scraper blade 121 increases. When the resistance of sludge and water becomes large and the traveling device 101 is run quickly, the scraper blade 1
The scraper blade 12 rises above the settled sludge layer, making it impossible to scrape up the sludge.
It is necessary to move the scraper blade 1 slowly, and as a result, it takes a long time to scrape up the sludge (as a result, the sludge discharge work). The power becomes larger, which increases operating costs. Furthermore, during the sludge scraping operation using the scraper blade 121, the water is stirred and a part of the sludge that had settled on the tank bottom 110a becomes suspended in the water, and the suspended sludge is moved from the upper end of the scraper blade +21 to the rear in the direction of movement. move to the side,
In addition to the problem of poor sludge discharge performance, if a large amount of sludge has accumulated at the bottom of the tank, or if the tank is long, the closer it is to the sludge pool 111, the more the sludge is scraped away by the scraper blade +21. The amount of sludge that is collected increases and the sludge is piled up high on the front side of the scraper blade 121, and as shown in FIG.
There was also the problem that sludge overflowed (arrow R) from the upper end of the tank 21 toward the rear side (arrow P side) in the traveling direction and remained at the tank bottom 110a. In addition, in order to scrape the sludge that has overflowed from the upper end of the scraper blade 121 toward the rear side in the traveling direction toward the sludge pool part 12 side, the sludge scraping device Y is returned to the end on the side opposite to the old sludge pool part 111 and the scraping operation is performed again. However, part or most of the overflowing sludge is suspended in the water, and it takes a considerable amount of time for the suspended sludge to settle to the tank bottom 110a, and during that time, the sludge scraping work is carried out. It is necessary to interrupt the sludge discharge process, which further increases the time required for sludge discharge.

(Object of the Invention) In view of the problems of the conventional sludge discharging device for a sludge settling tank, the present invention is capable of discharging settled sludge in a sludge settling tank in a short time and cleanly, and enables low-cost operation. The object of the present invention is to propose a sludge discharge device that can cleanly discharge sludge in one operation even if the effective length or effective volume of the sludge settling tank increases.

(Means for Achieving the Object) The sludge discharge device of the present invention includes a sludge pump that pumps up settled sludge in the sludge settling tank, which is suspended and supported on a traveling device that can reciprocate above the sludge settling tank. and moving the sludge pump on the traveling device in a direction horizontally intersecting the traveling direction of the traveling device by a drive device.
It is characterized by being structured in such a way that it can be easily accessed.

(Function) According to the present invention, the sludge can be discharged to the outside by pumping up the settled sludge in the sludge settling tank with the sludge pump suspended from the traveling device. In that case, since a relatively small sludge pump is simply suspended in the water, the movement resistance when moving the sludge pump is small, making it possible to increase the traveling speed of the traveling device and using less power. The traveling device can be driven by Furthermore, since the running direction of the traveling device and the direction in which the sludge pump is moved by the drive device are horizontally intersecting, the sludge pump can be automatically controlled to move in a zigzag pattern while pumping the sludge. , sludge discharge work can be performed continuously over the entire area inside the sludge settling tank.

(Effects of the Invention) The sludge discharging device for a sludge settling tank of the present invention has a sludge pump suspended from a traveling device as described above, which has a small movement resistance when moving in a sludge settling tank. Compared to the sludge ejecting device shown in Fig. 3, the running speed of the traveling device can be increased to shorten the sludge discharge work time, and the traveling device can be driven with small power, reducing operating costs. Can be done. In addition, since the sludge pump pumps up the settled sludge in the sludge settling tank, unlike the conventional sludge collection type sludge discharge device (Figures 3 and 4), sludge is removed during sludge collection work. The sludge in the area where the sludge pump has passed can be reliably discharged without leaving a large amount of sludge floating in the water or overflowing the top end of the scraper blade, and the sludge can be reliably discharged at the sludge ratio. #
Even if the length of the tank is increased or the effective volume is increased, there is an effect that no undischarged sludge remains in the sludge settling tank.

(Embodiment) A preferred embodiment of the present invention will be described with reference to FIGS. 1 and 2. The sludge discharge device for a sludge settling tank of this embodiment is
The settled sludge A in the sludge settling tank 10 is pumped up by a traveling device 1 that can reciprocate above the elongated rectangular sludge settling tank IO in the length direction (arrow P-Q direction) of the sludge settling tank 10. The second sludge stage pump 2 is suspended and supported, and the sludge pump 2 can be moved in a direction perpendicular to the traveling direction of the traveling device 1 (in the direction of arrow R-3) by means of a drive bag W3. has been done.

Rails 11 and 11 are laid on both sides of the sludge settling tank 10 in the width direction, respectively, over the entire length of the tank in the longitudinal direction (arrow P-Q direction).

The traveling device 1 connects a pair of platforms m+ 2.12 that travel guided by the respective rails 11.11 with a single horizontal member I3 constructed in the direction of the arrow R-S, and .12 is moved forward or backward by a motor I4.

A hoist 15 for hoisting and lowering the sludge pump 2 is attached to the horizontal member 13 of the traveling device 1 so as to be movable along the horizontal member 13 by a drive device (motor) 3. The hoist 15 is caused to move forward or backward over the entire length of the horizontal member 13 by rotating the motor 3 in the forward or reverse direction.

The sludge pump 2 connects the hoist 15 to the wire 16
It is suspended so that it can move up and down. A vane 21 for stirring sludge is provided at the bottom of the sludge pump 2, so that when the pump is operated, the sludge can be sucked while stirring.

The sludge-containing water pumped up by the sludge pump 2 is guided through a drainage hose 17 into a sludge tank 20 provided near the outside of the sludge settling tank 10.

The motor 14 of the traveling device 1 and the drive device (motor) 3 for moving the hoist are sequentially driven by a predetermined amount under Noken control, and the sludge pump 2 is moved to the sludge settling tank as shown by the dotted line B in FIG. It is set to move in a zigzag pattern over the entire bottom portion 10a of the IO.

This sludge discharge device is used as follows. First, the trolley 12.12 of the traveling device 1 is brought to one end in the longitudinal direction of the sludge settling tank 10 (in this embodiment, the end on the arrow P side), and the hoist 15, which suspends the sludge pump 2, is moved along the arrow R. Move it to one end in the S direction. The sludge pump 2 is suspended at a position slightly spaced above the bottom surface 10a of the sludge settling tank 10 directly below the hoist 15. In this state, when the sludge pump 2 is operated and the switches of the motor 14 of the traveling device 1 and the motor 3 of the hoist 15 are turned on, the sludge pump 2 is activated. While pumping up sludge A in a nearby range, the sludge pump 2 sequentially moves in a zigzag pattern following a set course. The water mixed with sludge pumped up by the sludge pump 2 is sequentially discharged into the sludge tank 20 through the drainage hose 17.

Since this sludge discharge device is of the pump type, even if the sludge on the tank bottom 10a is stirred by the stirring blades 21 and temporarily floats near the pump during sludge discharge work, it will be sucked into the pump 2 immediately after. In order to remove sludge, pump 2
No undischarged sludge remains after the sludge has passed.

After the sludge pump 2 has passed through the entire area of the bottom 10a of the sludge settling tank in this way, the motor 14 of the traveling device 1, the motor 3 for moving the hoist 15, and the sludge pump 2 are activated. Then, with the hoist 15 hoisting the trolley 12 up to one side above the water surface, the motor 14 of the traveling device l is rotated in the opposite direction to return the trolley 12 to its original starting position. Prepare for sludge discharge work.

In the sludge discharge device of this embodiment, only the relatively small tη mud pump 2 is immersed in water during sludge discharge work, so even if the traveling device 1 or the hoist 15 is moved, the movement resistance is small. Therefore, it becomes possible to speed up the sludge discharge work, and since it can be operated with small power, the operating cost is also reduced.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a usage state of a sludge discharge device according to an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is an explanatory diagram of a conventional sludge discharge device in a usage state, and FIG. 4 is a partially enlarged view of FIG. l...Traveling device 2...Sludge pump 4 Nage pump 3...Drive device (motor) IO...Sludge settling lla tank +1...Rail 12...・Bogie 13...Horizontal member 14...Motor 15...Hoist 20...Sludge tank A...Sludge Figure 3 Figure 4

Claims (1)

[Claims] 1. A sludge pump (2) for pumping up settled sludge in the sludge settling tank (10) is suspended and supported by a traveling device (1) that can reciprocate above the sludge settling tank (10). , the sludge pump (2) is connected to the traveling device (
1) A sludge discharge device for a sludge settling tank, characterized in that the top thereof is configured to be moved by a drive device (3) in a direction horizontally intersecting the traveling direction of the traveling device (1).