JPH0426008B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a dredging processing device that can continuously process dredged muddy water into useful earth and sand, and particularly relates to a dredging processing device that can be optimally used for dredging a reservoir.

(Prior Art, Problems to be Solved by the Invention) Conventionally, there have been the following types of dredging processing means of this type, for example, as a dredging processing means for a reservoir.

The first method is to dry the reservoir, dredge up the soil, and transport it out by truck.

However, this method requires a water outage, requires a drying period for the sediment in the reservoir after the water outage, and because the sediment has a high moisture content, muddy water leaks during transport by truck and pollutes the roads. There are other problems.

The second method is to dredge with a dredger and transport the muddy water to a settling pond for treatment.

However, this second method cannot be used unless a dredger can be brought in, it cannot be used unless there is a sedimentation pond near the reservoir, and the sediment in the sedimentation pond cannot be removed until a certain period of time has elapsed. There are other problems.

(Means for Solving the Problems) Therefore, in order to solve the above-mentioned conventional problems, the present invention provides a ladder suction pump ship that simultaneously excavates accumulated soil by jet injection and sucks it up by a sand pump. A vibrating sieve and a classifier that continue to supply muddy water discharged from the discharge port of a sand pump discharge pipe extending from a pump ship and that continue to remove coarse particles and fine particles from the muddy water, and these vibrating sieves and classifiers. a raw mud tank that continues to be supplied with muddy water from which coarse particles and fine grains have been removed, and that continues to stir the supplied muddy water;
A flocculant supply device that automatically continues to add polymer flocculant from the middle of the slurry pipe that continues to supply mud water from the raw mud tank to the centrifuge, and mixes it uniformly during transportation;
The concentration is made uniform by stirring in the raw mud tank,
In addition, the flocculant supply device continues to supply the muddy water to which the flocculant has been added, and the forced solid-liquid separation of the supplied muddy water and the generation of flocs by the polymer flocculant proceed simultaneously while discharging each solid-liquid. The present invention relates to a dredging processing device having a centrifugal separator that continues to operate.

(Example) Hereinafter, an optimal example of the dredging processing apparatus according to the present invention will be described based on the drawings.

1 in the figure is a rudder suction pump ship. This pump ship 1 includes a hull 2, a sand pump 3, a main motor 4, a jet pump 5, a jet pump motor 6, winches 7 and 8, a generator 9, an operation room 10, a rudder 11, a suction head 12 with a suction adjustment cover, and a suction head 12 with a suction adjustment cover. Pipe 13, jet ejector pipe 14, jet ejector valve 15, water distribution pipe 1
6. Sand pump discharge pipe 17, sand pump suction pipe 18, jet pump discharge pipe 1
9, is equipped with a suction pipe 20 for a jet pump, etc.

The pump boat 1 can move freely on the water surface by winching a wire 21 whose free end is fixed at a predetermined location.

In addition, the pump ship 1 continues to jet the water sucked up by the jet pump 5 through the suction head 1 to excavate accumulated sediment at the bottom of the water, and simultaneously sucks up the muddy water with the sand pump 3, and connects the sand pump discharge piping. 17, and continues to discharge muddy water from its discharge port 22.

In the figure, 23 is a two-stage vibrating sieve that receives the muddy water, and 24 is a Granbell classifier. The muddy water discharged from the discharge port 22 is passed through the vibrating sieve 2.
3. Granbell classifier 24 is supplied in this order. The vibrating sieve 23 removes coarse particles 25 from the muddy water, and the Granbell classifier 24 removes fine particles 26 from the muddy water after the coarse particles have been removed. 27 to a predetermined location.

Further, 28 in the figure is a concentration tank. Mud water from which the coarse particles and fine particles have been removed (mud water in the form of fine particles of 5 mm or less) is continuously supplied to the thickening tank 28 , and is continued to be stirred and supplied to the raw mud tank 30 by the pump 29 . The mud water supplied to the raw mud tank 30 is further stirred to have a uniform concentration, and continues to be supplied to the centrifugal separator 32 through the mud infusion pipe by the pump 31.

33 in the figure is a lime dissolution tank. This lime dissolving tank 33 continues to add lime to the mud water that is being supplied from the raw mud tank 30 to the centrifugal separator 32. In other words, it is used to adjust the pH of muddy water if it is acidic.

Further, numeral 34 in the figure is a flocculant supply device. This flocculant supply device 34 is connected from the raw mud tank 30 to the centrifugal separator 3.
The polymer flocculant continues to be automatically added to the muddy water continuously supplied from the middle of the mud infusion pipe. The polymer flocculant and muddy water are uniformly mixed within the pipe while being transported. A polymer flocculant is added to improve the separation efficiency in the centrifugal separator 32.

In the figure, 35 is a polymer flocculant dissolving device, 36 is a polymer flocculant dissolving tank, 37 is a hopper, 38 is a compressor, 39 is an air dryer, 40 is a pump, and 41 is a washing water supply pipe.

Furthermore, the centrifugal separator 32 continues to be supplied with muddy water to which lime, a polymer flocculant, etc. have been added as described above, and inside the separator, forced mechanical dehydration by centrifugal force and chemical dehydration by the polymer flocculant are carried out in the separator. Flock generation and dehydration are simultaneously carried out efficiently. The muddy water is forcibly separated into solids and liquids while continuing to discharge each.
The solids stick to the inner peripheral wall of the rotating centrifuge 32 and are dehydrated, and the liquid is discharged from the centrifuge 32. The solid matter is removed by a screw-type solid matter discharge device 49 that rotates while being inscribed in the inner circumferential wall of the centrifugal separator 32.
continues to be emitted. The discharged solid matter 42 is conveyed to a predetermined location by a belt conveyor 43. Further, the liquid is supplied to a separated liquid tank 45 through a separated liquid pipe 44, and is returned to a reservoir or the like by a pump 46.

Further, in the figure, 47 indicates a cooling water pipe for supplying cooling water for cooling the centrifugal separator 32, and 48 indicates a discharge pipe for discharging the cooling water that has lost its cooling ability.

(Effects) The dredging treatment device according to the present invention configured as described above is capable of excavating accumulated earth and sand using a ladder suction pump boat, sucking up the muddy water, using a vibration sieve for the muddy water through the sand pump discharge piping, and using a classifier. Removal of coarse and fine particles from the muddy water using these vibrating sieves and classifiers, stirring of the muddy water from which the coarse and fine grains have been removed in the raw mud tank, and homogenization of the concentration through the stirring. The flocculant is added to the mud from the middle of the mud pipe connecting the raw mud tank and the centrifuge using the flocculant supply device, and the mud and polymer flocculant are uniformly mixed during transportation through the mud pipe and centrifuged. The continuous process of forcibly separating solids and liquids, simultaneously producing flocs, and discharging each while separating solids and liquids allows for efficient dredging of sediments in reservoirs, etc. In addition, it has the unique effect of being able to run all the processes seamlessly and perform continuous processing.

Therefore, it can be used extremely effectively as a dredging processing device that can eliminate the need for conventional dredging processing means of this type.

[Brief explanation of drawings]

The drawings show an embodiment of the dredging processing apparatus according to the present invention, with FIG. 1 being a plan view and FIG. 2 being a three-dimensional view. Explanation of main symbols in the diagram: 1...Ladder suction pump ship, 3...Sand pump, 17...Discharge piping for sand pump, 22...Discharge port, 23...
Vibrating sieve, 24... Classifier, 30... Raw mud tank,
34...Flocculant supply device, 32...Centrifugal separator.

Claims (1)

[Claims] 1. A ladder suction pump ship that continues to simultaneously excavate accumulated soil by jet injection and suck it up by a sand pump, and muddy water discharged from the outlet of the sand pump discharge pipe extending from this pump ship continues to be supplied, and the muddy water continues to be supplied. vibrating sieves and classifiers that continue to remove coarse particles and fine particles; muddy water from which coarse particles and fine particles have been removed by these vibrating sieves and classifiers continues to be supplied, and the supplied muddy water continues to be stirred. A flocculant supply device that automatically continues to add a polymer flocculant from the middle of a raw mud tank and a mud transfer pipe that continues to supply mud water from the raw mud tank to a centrifugal separator and mixes it uniformly during transportation; The concentration is made uniform by stirring in the raw mud tank, and the flocculant-added mud water is continuously supplied by the flocculant supply device, and the supplied mud is forced to undergo solid-liquid separation and polymer flocculant. This dredging treatment equipment includes a centrifugal separator that continues to discharge each solid and liquid while simultaneously producing flocs.