JPS6010023A - Discharge of sedimented soil and sand from sedimentation pond - Google Patents

Abstract

PURPOSE:To easily discharge sedimented soil and sand on the bottom under water by a method in which sediments on the bottom under water, dredged by an underwater dredger, are sucked with water to the outside of sedimentation basin by a dredger, and solids are separated from water and discharged. CONSTITUTION:An underwater dredger 2 is traveled on the bottom under water of a sedimentation basin 1, a shutter 27 with jet nozzles is driven, and a pump 28 is driven. Whereupon, soil and sand 3 are dredged by a scraper 26 with claw and housed in a soil intake portion 22. The soil and sand 3 are sent to a soil treating car 4, solids are separated from liquid and discharged to a dump truck 8, and liquid is returned through a hose 7 to the sedimentation basin 1.

Description

[Detailed Description of the Invention] The present invention enables easy dredging of sediments in sedimentation ponds, etc. ! i",
The present invention relates to a method for discharging accumulated sediment using a sedimentation tank or the like, which can be discharged using sediment.

The processing capacity of a water treatment plant's settling basin, which settles sediment such as sludge and sand contained in river water, decreases significantly in less than a year due to the accumulation of large amounts of sediment. Therefore, in order to restore the above-mentioned processing capacity, conventionally, the above-mentioned piled earth and sand have been excavated using a shovel loader or a grab hegeso 1~, and the excavated piled earth and sand has been transported and disposed of using a dump truck. Ta. However, in this conventional method, some of the accumulated soil that has been scooped up by a shovel loader, etc., flows out before being transferred to the tanker, resulting in poor work efficiency.
Due to the general nature of transportation, there are drawbacks such as sewage being spilled on the road during transportation, and furthermore, the number of times transportation is required, resulting in huge costs.

Furthermore, the discharge of accumulated sediment is not limited to the above-mentioned settling basins, but also industrial water tanks, 6-tube compaction tanks at sewage treatment plants, urban sewers, etc. This is also required to be done effectively.

In view of the above-mentioned points, the present invention provides a method for discharging accumulated sediment from a sedimentation basin, etc., which can easily dredge and discharge accumulated sediment from a sedimentation basin, etc., without drawing out water from the sedimentation basin. It is.

That is, the method for discharging sediment from a sedimentation tank or the like of the present invention involves dredging the sediment using an underwater dredger that runs on the bottom of a sedimentation tank or the like and dredging the sediment on the bottom of the water. is sucked together with water from the above-mentioned submersible dredger to the outside of the sedimentation pond, etc.
It is characterized by separating the accumulated sediment and water that has been sucked into solid and liquid, and discharging the solid content.

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the sediment IA removal method of the present invention, such as a sedimentation basin, having the above-mentioned characteristics will be described with reference to the drawings together with the apparatus used therein.

In the drawing, ■ is a settling basin, 2 is an underwater dredger that runs on the bottom of the settling basin 1 and dredges the sediment 3 on the bottom of the water, and 4 is a submersible dredger that is parked near the settling basin 1 and connects a hose 5 from the underwater dredging basin la2. 6 is an underwater dredger υ) 12 which performs solid-liquid separation and dehydration of the sediment and water sucked in through the dredging sediment treatment vehicle, which discharges the solid content into the dump truck 8 and returns the liquid content to the settling basin 1; This is a bow reel with a pump that automatically adjusts the amount of deflection of the hose 5 connected to the submersible dredger 2 to a predetermined value during the running of the submersible dredger 2, thereby reducing the weight of the hose 5 through which heavy dredged sediment flows.

To explain in more detail the above-mentioned device used in the method for discharging accumulated sediment such as a sedimentation basin according to the present invention, the underwater dredge 1Iljj machine 2 has a pair of braces on both sides thereof so that it can run efficiently against soft accumulated sediment. It is equipped with caterpillars 21.21 and has a built-in drive source (not shown) using a hydraulic motor for driving the pair of caterpillars 21.21. Each of the caterpillars 21.degree. 21 is equipped with spray pads at both ends in the width direction, so as not to come off the track. Further, a dredged sediment intake section 22 is provided between the pair of caterpillars 2L21, and a refueling pipe 23 is provided at the top of the submersible dredger 2, the upper end of which protrudes into the water surface of the settling basin 1. be. A balance measuring ring 24 for monitoring the inclination of the submersible dredger 2 is provided at the top of the oil supply pipe 23, and the lower end of the oil supply pipe 23 is connected to the oil tank 25 for the drive J source. It is a combination. Also, in the dredged sediment intake section 22, a pair of caterpillars 21.21 are provided.
A forward-facing claw scraper 26 is provided to protrude further downward than the front end of the claw scraper 26 and is provided so as to be adjustable in angle as shown by the arrow in FIG. A shank 27 with a jet nozzle that is movable in the direction of approaching and separating as shown by the arrows in FIG. It is set up. Further, numeral 29 is a rotary swing arm joint that connects the pump 28, 28 and the hose 5, and numeral 30 is a jet sand pump. The water in the sand settling basin 1 is used as the (adjustment) water for this jet sand pump 30, and the jet sand pump 30 and the pumps 28 and 28 can be driven by different driving sources depending on the work situation. By adjusting the rotation speed of a certain hydraulic motor, the conveying capacity of dredged sediment can be adjusted in various ways. In addition, the underwater dredging machine 2 is
A pair of caterpillars 21.21 move forward as shown by the arrows, and when their front ends touch the side wall of settling basin 1, the town also
It is equipped with bumpers on the front and back that absorb water and automatically change the running direction, and it can run all over the bottom of the sand settling basin 1 by radio control.

The dredged sediment processing vehicle 4 also has cyclones 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 40, cyclones for centrifuging and solid-liquid separation of the dredged sediments sucked through the hose 5 into the dredged sediment sediment processing vehicle 4.
A vibrating screen 42 (see Fig. 1) further separates the solid content separated into solid and liquid by the cyclone 4141, and a mini Zyclone 43 (see Fig. 1) which further separates the liquid part separated into solid and liquid by the cyclone 4141 as necessary. ), and Su Ikron 4
1°41, vibrating screen 42 or mini cyclone 43
The solid-liquid separated liquid is passed through the hose 7 to the sedimentation method 1.
It is equipped with a pressure pump 44 for refluxing to C1, and is not equipped so that the solid content separated from solid and liquid by the vibrating screen 42 or mini cyclone 43 can be extracted to the dump truck 8.

FIG. 4 shows another dredged sediment processing vehicle similar to the above-mentioned dredged sediment processing vehicle. There is no such thing as pressure feeding to cyclones 4+, 41. The liquid separated into solid and liquid by the cyclones 41 and 41 is returned to the sand settling area via the hose 7, and the solid separated into solid and liquid by the cyclones 41 and 41 is dehydrated by the vibrating screen 42. There is no such thing. The solid content dehydrated by the vibrating screen 42 is discharged to the dump truck 8 via the conveyor 47, and the liquid content dripping onto the vibrating screen 42 is returned to the settling basin 1 via the hose 7. 48 is a stirring motor, 49 is a drive motor for the pump 46, 50 is a vibrating screen 42
With the drive motor, the vibrating screen 42 is configured to vibrate in a direction of 45 degrees with respect to the horizontal plane with an amplitude of 6 to 7 mm.

Further, the stirring tank 45 is designed so that it can be loaded on a vehicle in a horizontal state, and the pump 46 is also not installed so that it can be loaded by removing the piping.

Next, one embodiment of the method for discharging accumulated sediment from a sedimentation tank or the like according to the present invention using the above-mentioned apparatus will be described in detail.

First, when carrying out the force method for discharging accumulated sediment from sedimentation basins, etc. of the present invention, the above-mentioned equipment, such as submerging the submersible dredger 2 in the sedimentation basin 1, is arranged as shown in the figure, and predetermined piping is connected as shown in 1. Do the work.

Next, the underwater dredger 2 is driven to the bottom of the sand settling basin 1, and at the same time, the jet nozzle-equipped shutter 27 is driven,
and drives pump 28.28.

Due to this operation of the underwater dredging machine 2, the consolidated sediment 3 (solid content concentration, e.g. 75LH1%) at the bottom of the settling basin 1 is
is effectively dredged by the claw-equipped scraper 26 and stored in the dredged sediment intake section 22. At this time, the dredging angle of the scraper 26 with claws can be automatically adjusted, but it is necessary to adjust it to a certain angle in advance so that the amount of dredging of the accumulated soil 3 by the scraper 26 with claws is, for example, 0.3 cubic meters/ minutes. The dredged sediment 3 accommodated in the dredged sediment intake section 22 is stirred and pulverized together with water by the jet of the jet nozzle-equipped shank 27 to have a solid content of, for example, 30% by weight.

The dredged sediment 3 in the dredged sediment intake section 22 that has been stirred and crushed is sent to the dredged sediment processing vehicle 4 via the hose 5 by the pumps 28 and 28.

Note that the underwater dredging machine 2 is automatically run as described above, and the underwater dredging machine 2 is refueled from the oil supply pipe 23 as necessary.

In the dredged sediment processing vehicle 4, the dredged sediment 3 sent together with water via the hose 5 is separated into solid and liquid, and the solid-liquid content is 81 tons.
The solid content is discharged to the dump truck 8, while the solid-liquid separated liquid content is returned to the settling basin 1 via the hose 7.

In this case, the solid-liquid separation by the cyclone 41° 41 is performed until the solid content concentration reaches 70% by weight, and the solid-liquid separation by the vibrating screen 42 or the mini cyclone 43 is
For example, the treatment is carried out until the solid content concentration reaches 75% by weight. In addition, at this time, only particles of 75μ or less are mixed in the liquid bone that is returned to the grit settling basin 1 from the cyclone 41. It is possible to create a state in which only particles of 30 μm or less are mixed in the liquid bone that is returned.

In addition, although the embodiment mode of dredging the accumulated sediment in the sedimentation tank 1 and releasing it to U1 has been described above, the method for discharging the accumulated sediment in the sedimentation basin etc. of the present invention is as follows: It can be applied to other sedimentation ponds such as tanks, urban sewerage, etc.
It goes without saying that the apparatus used in the sediment discharge method, such as the sedimentation basin of the present invention, is not limited to that shown in the drawings.

As described above, according to the method for discharging accumulated sediment in a sedimentation basin, etc. of the present invention, the accumulated sediment in a sedimentation basin, etc. can be easily dredged and discharged without draining the water from the sedimentation basin, etc., which is a great advantage. The effect is produced.

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining one embodiment of the method of the present invention.
2 and 3 are a side view and a plan view, respectively, of an apparatus used in the method of the present invention, and FIG. 4 is a side view showing another example of a dredging and sediment treatment vehicle used in the method of the present invention. 1... Sedimentation basin (sand settling area) 2... Submersible dredging machine 3... Sediment sediment patent applicant Silktsuk Research Institute, BUINIS D Co., Ltd.

Claims (1)

[Claims] (1) Dredge the accumulated sediment using an underwater dredger that travels on the water bottom of a sedimentation basin, etc. and dredges the accumulated sediment on the bottom of the water, and transport the dredged sediment together with water from the underwater dredger to the outside of the sedimentation basin, etc. It is equipped with a device for sucking, separating the sucked accumulated sediment and water into solid and liquid, and discharging the solid content, and has a built-in drive source for driving the pair of caterpillars with a hydraulic motor. Between the caterpillars, a dredged sediment intake part is provided on the main part, an oil supply pipe whose upper part protrudes above the water surface and whose lower end is connected to the oil supply tank for the driving J source, and the dredging Sediment intake B1
; includes a forward-facing, angle-adjustable claw (=J scraper) that protrudes below the pair of caterpillars, and a front, l, ii,
It is equipped with a pump that is movable in the direction toward and away from the i part, and a pump that sucks and pressure-feeds the dredged sediment in the dredged sediment intake section, A method for discharging accumulated sediment from a sedimentation tank or the like as set forth in claim (1).