KR20130013129A - A dredging method including spim-dry and precipition for vacuum tanck - Google Patents

Abstract

PURPOSE: A spin-dry using a vacuum tank and a dredging method including a precipitate are provided to be able to stabilize dredged sediment, drop discharged dredged sediment steadily, and easily treat by natural falling and precipitating inputted dredged sediment. CONSTITUTION: A dredging method comprises the following steps: preparing dredged sediment by using a dredging apparatus of dredged deposit of a sewer; inflowing dredged sediment to the vacuum tank through a suction hose from the sewer connected with a side of the dredging apparatus; stabilizing a discharging semi-solid from the dredged sediment to the lower part by discharging liquid of the dredged sediment inputted from the suction hose through a vacuum tank mounted with multiple vacuum pumps which is connected with the suction hose; and ejecting spin-dried dredged sediment to the outside by spin-drying the ejected semi-solid dredged sediment. [Reference numerals] (AA) Start; (BB) End; (S10) Dredging step; (S30) Dredged sediment discharging step; (S50) Dredged sediment stabilizing step; (S70) Dredged sediment treating step

Description

Dredging method including dehydration and precipitation using vacuum tank {A dredging method including spim-dry and precipition for Vacuum tanck}

The present invention relates to a dredging method including dehydration and sedimentation using a vacuum tank, and more specifically, having a vacuum tank vertically erected, which can continuously discharge dredged water flowing from a suction pipe by spontaneous dropping and sedimentation. Dredging method including dehydration and sedimentation using vacuum tank, equipped with funnel-shaped dredging induction device in the lower side of vertical vacuum tank to prevent falling dredged water flowing into suction pipe stably dropping, vacuum tank The dredge can be quickly discharged by the dredged sediment prevention device that prevents dredged drops falling in conjunction with the rotating shaft at the lower side of the vacuum tank, and the flocculating material is injected into the upper part of the suction pipe. By connecting pipes, agglomerates can be rapidly precipitated by agglomerating fine sludge with low specific gravity. Contaminated water, including micro sludge, which does not settle in the vacuum tank, is forced to flow by using a pump while administering a flocculant, and a secondary settling tank is provided with a settling tank to repeatedly settle and discharge dredged water. Multiple vacuum pumps can be connected in parallel to the vacuum tank, enabling dredging under conditions where the sewer pipes are very deep and the distance between the manholes is far apart, and when mounted on a vehicle, the cylinder is installed vertically. The present invention relates to a dredged water treatment method using a vacuum tank that can be conveniently moved to the site and dredged and dewatered and dredged regardless of the place.

As it is well known, large amounts of water are used according to the influence of industrial development and urbanization, and daily sewage and industrial wastewater are increasing day by day, and heavy rainwater flows through sewage pipes due to heavy rains during the rainy season. Of course, suspended solids or earth and sand are deposited in the sewage that flows with the rainwater.

As sedimentation increases, sewage pipes gradually become clogged. If sedimentation prolongs, sewage flows back and affects the living environment enormously. Therefore, the role of sewage pipes is very important.

As such, the sewer dredging works include manpower dredging methods and dredging devices. The method using suction dredging vehicles is mainly used, but a single vacuum pump using a simple structure tank, limited loading capacity and power of a vehicle engine is used. If there is a high depth of pipeline or manhole and manhole gap far away due to the limit of dredging, there is a limit to dredging work, and if dredged water is filled in the tank mounted on the vehicle, it is necessary to move the vehicle to empty dredged water and start again. As a result, continuous operation is impossible and dehydration is difficult to expect.

In order to compensate for the above problems, the dredged comprehensive system of Patent No. 10-0969824 has been developed.

1 is a conventional dredged water treatment system (Registration No. 10-096982), as shown in Figure 1, the conventional dredged water treatment system is a coarse wood screen 10, the washing water supply 20 , The inlet hopper 30, the inlet tank 40, a wood / wood integrated bar screen type vibrator 50, a contaminant cleaner 60, a treated water tank 70, and the coarse wood screen 10 is a dredging vehicle. The coarse wood screen 10 has a lattice structure and is made of a stainless steel sheet having excellent corrosion resistance so as to first capture large contaminants in dredged water dropped from (1), and the washing water supply 20 is cleaned. And a washing water supply pump 22 for supplying the washing water stored in the washing water storage unit 21 to the upper portion of the coarse wood screen 10 and the washing water storage unit 21 storing water, and the inflow hopper 30 ) Is at least one side connected to the inflow tank 40 at the bottom of the coarse wood screen 10 and inflow The tank 40 and the coupling member 35 such as a bolt nut or the like are joined by a method such as welding, and a shock absorbing member 33 formed in the horizontal direction is included.

However, since the conventional dredged water treatment system does not have any device connected to the sewer pipe, it is difficult to process dredged water in the sewer pipe, and due to the characteristics of dredged water treated in the sewer pipe, it is necessary to continuously suck and treat a large amount of dredged water to be applied to the sewer pipe. There was a very difficult problem.

In addition, the conventional dredged water treatment system has a problem that can not be used at all in the field of sewage pipes because the structure is very complicated and the volume of the facility is very large.

The present invention was created in view of the above-mentioned disadvantages of the prior art, and the dredging method including the dehydration and precipitation using the vacuum tank according to the present invention is provided with a vacuum tank vertically entered and introduced from a suction pipe. It is possible to treat dredged water naturally and quickly settle the dredged water continuously and settle and dehydrate at the same time in a continuous way.It is equipped with a funnel-shaped dredged water induction device which extends to the inside of the vertical vacuum tank to the suction pipe. Dredged water stably drops and dredged water is prevented from being stuck to the vacuum tank, and dredged water is prevented from being stuck to the vacuum tank. A fine sludge with low specific gravity is supplied by connecting a coagulant input pipe into which a coagulant is injected. Sedimentation tank can be sedimented and the sedimentation tank can be precipitated and dehydrated repeatedly by introducing a sedimentation tank in which contaminated water, including micro sludge, which has a low specific gravity that cannot be sedimented from the vacuum tank, is precipitated together with a flocculant. By connecting several vacuum pumps connected in parallel to the vacuum tank in parallel, dredging can be carried out under the condition that the sewer pipe is very deep and the distance between the manholes is far apart, and the vehicle is equipped with a cylinder that vertically installs the vacuum tank. It can be dredged and dehydrated regardless of the location by moving conveniently to the place, and is equipped with a backwash spray nozzle that sprays high pressure water to prevent partial blockage of the suction hose often occurring inside the suction hose. Dredging method that includes dehydration and sedimentation using vacuum tank that can greatly improve the effect It is in the blank.

The present invention is a means for achieving the above object, the dredging method including the dewatering and sedimentation using the vacuum tank according to the present invention dredging the dredged by the dredging device 10 for dredging the sediment of the sewer pipe (1) Dredging step (S10) to be connected with one side of the dredging device 10, the dredged water transfer step (S30) and one side to transfer the dredged water dredged in the sewer pipe (1) to the outside through the suction hose (20), The liquid phase of dredged water flowing from the suction hose 20 through the vacuum tank 40 is connected to the suction hose 20 and the plurality of vacuum pumps 30 are mounted on the other side of the discharge pipe mounted on the upper portion of the vacuum tank. Dredged stabilization step (S50) and the semi-solid dredged out through the sediment stabilization step (S50), and the semi-solid dredge precipitated to the lower side of the vacuum tank 40 of the dredged stabilization step (S30) to the capacity using a rotary valve. Properly discharged to fit Turn is equipped with a dewatering device 60 for dewatering, characterized in that the dewatered dredged material consisting of dredging water treatment step (S70) for discharging to the outside.

Dredging method including the dehydration and precipitation using a vacuum tank according to the present invention having the configuration as described above has the following effects.

First, the upper side is formed in a cylindrical shape, the lower side is a funnel-shaped vacuum tank is placed in the entrance of the dredged water flowing into the suction pipes naturally sedimentation and sedimentation can be conveniently carried out sedimentation and dehydration treatment,

Second, the inner side of the tank body is connected to the center of the fixed shaft connected to a plurality of horizontally formed a rotating shaft, and dredging flows from the suction pipe by connecting the first diffusion pipe and the second diffusion pipe extended downward to the upper side of the rotation shaft Dredged water with high specific gravity can fall stably without scattering, and a funnel-shaped diffusion hole is provided inside the first diffusion tube so that the dredged water dropped through the first diffusion tube has a low specific gravity. To spread evenly,

Third, it is possible to induce dredged water to settle quickly at the lower end of the sedimentation tank by allowing the dredged water with a high specific gravity to fall into the center by forming a reduction tube which is fixed to the fixed shaft and concentrically lowered.

Fourth, dredged sediment prevention device for preventing dredged water falling in conjunction with the rotating shaft in the lower side of the vacuum tank is fixed to the vacuum tank, it is possible to quickly discharge dredged water, dredged sediment settled at the bottom of the vacuum tank It is equipped with a rotary valve to discharge to the bottom can be discharged by adjusting the dredged sediment deposited to the outside of the vacuum tank to the capacity of the dehydrator,

Fifth, the upper side of the vacuum tank is provided with a coagulant input pipe connected to the upper portion of the suction pipe to easily inject the flocculant to agglomerate the micro sludge with a low specific gravity flow, it can be rapidly settled,

Sixth, the cleaning brush is provided for the impurities accumulated on the outer surfaces of the first diffusion tube and the second diffusion tube, so that the impurities can be shaken off in real time, so that it is not necessary to wash separately, and thus can be conveniently used.

Seventh, the upper side of the vacuum tank is provided with a water level sensor for detecting the level of dredged water introduced, the discharge pipe for discharging the dredged liquid including micro sludge to the outside, and the discharge pump is interlocked with the water level sensor If the dredged liquid containing micro sludge in the tank is higher than the predetermined height, it can be detected and discharged automatically and continuously.

Eighth, the sedimentation tank is provided on the outside of the vacuum tank, the primary discharged from the vacuum tank can be introduced into the contaminated water including the micro sludge by the second precipitation and sedimentation and dehydration can be repeatedly discharged,

Ninth, by connecting a plurality of vacuum pumps connected in parallel to the vacuum tank to operate the vacuum pump in accordance with the site conditions, dredging work is possible even if the sewage pipeline is very deep and the distance between the manhole and the manhole is far away,

Tenth, by placing the vacuum tank horizontally on the vehicle, and equipped with a cylinder to vertically install the vacuum tank in the vehicle, it is convenient to move on site, dredging and dehydration treatment regardless of the place,

Eleventh, there is an effect that can drastically improve the dredging effect by installing a backwash injection nozzle for spraying high-pressure water to prevent partial blockage of the suction hose often occurring inside the suction hose.

1 is a schematic diagram showing a conventional dredged water treatment system.
Figure 2 is a schematic diagram showing the dredging method including the dehydration and precipitation according to the present invention.
3 is a schematic view showing a vacuum tank according to the present invention.
Figure 4 is a state diagram showing the dredging treatment by a vacuum tank according to the present invention.
5 is a schematic diagram of a state in which a vacuum tank according to the present invention is mounted on a vehicle.
Figure 6 is a process diagram showing the dredging method including the dehydration and precipitation according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Dredging method including the dewatering and sedimentation of the pipeline using a vacuum tank according to the present invention, as shown in Figures 2, 3 and 6, the dredging method including the dehydration and sedimentation to sediment, sedimentation by sedimenting sediment in the sewer pipe As a dredging step (S10) for dredging the dredged by the dredging device 10 for dredging sediment in the sewer pipe (1), and dredged water dredged in the sewer pipe (1) connected to one side of the dredging device (10) The dredged outflow step (S30) for outflowing through the suction hose 20 to the outside (S30), and the vacuum tank 40 is connected to the suction hose 20 on one side and a plurality of vacuum pumps 30 are mounted on the other side Dredged stabilization step (S50) and the liquid solids flowing out of the suction hose 20 through one side and the semi-solids precipitate to the lower side, and the lower side in the vacuum tank 40 of the dredged stabilization step (S30) Dehydrated by draining sediment Is made up of dredged material processing step (S70) for discharging the dredged material is provided with a dehydration device (60) to the outside dehydration.

The vacuum tank 40 of the dredging stabilization step (S30) is vertically entered, the upper side is formed in a cylindrical shape, the lower side is a funnel-shaped vacuum tank, the one side is connected to the suction hose 20 and the other side is A suction pipe 42 having an anti-floating portion 42a formed on both sides of the vacuum tank, which is bent inward from the upper side of the vacuum tank, a fixed shaft 43 connected to the inside of the vacuum tank a plurality of horizontally, and the fixing It is connected to the center of the shaft 43, the rotary shaft 44 is provided with a drive motor to be rotated, and connected to the upper side of the rotary shaft 44, the dredged water flowing from the suction pipe 42 is stably extended downward The first diffusion pipe 45 and a funnel-shaped diffusion hole 46 for evenly spreading the dredged water including the micro sludge having a low specific gravity falling from the inside of the first diffusion pipe 45 are provided.

In addition, the reduction tube 47 and the reduction tube 47 which is condensed downward so that the dredged water having a high specific gravity falling from the lower side of the first diffusion tube 45 to be fixed to the fixed shaft 43 is collected in the center. A second diffusion pipe 48 extended downward to diffuse the dredged water including the micro sludge with a low specific gravity falling from the lower side of the rotary shaft 44, and a rotary shaft below the vacuum tank. A dredged seizure preventing device 49 for preventing the dredging of falling dredged in association with 44, a rotary valve 50 for discharging the dredged precipitated to the lower portion of the vacuum tank to the outside, and the outside of the vacuum tank In the upper side is connected to the vacuum pump 30 is connected to the lower end is formed a vacuum tube 51 for sucking dredged water.

And, the upper side of the vacuum tank is provided with a coagulant inlet tube 52 to which the coagulant is injected to rapidly agglomerate the micro sludge having a low specific gravity introduced into the upper portion of the suction pipe 42, the first diffusion tube ( 45) and a cleaning brush 52 to shake off the dredging attached to the outer surface of the second diffusion pipe 48 is also provided.

In addition, the upper side of the vacuum tank is provided with a level sensor 54 for detecting the level of dredged water introduced into the inside of the vacuum tank, the upper side of the vacuum tank liquid dredge of the vacuum tank is higher than a predetermined height. In case of discharge pipe 55 to be discharged to the outside and the discharge pipe 55 to discharge the liquid dredge including the micro sludge to the discharge pipe 55 in conjunction with the water level sensor 54 inside the discharge pipe (55). Is provided.

Then, the contaminated water including the untreated micro sludge inside the vacuum tank is introduced into the vacuum tank 40 while the coagulant is introduced through the coagulant dispensing port provided at the top of the sedimentation tank. Semi-solids are provided with a sedimentation tank 70 for outflow to the lower side can be discharged to the outside through a rotary valve attached to the bottom of the sedimentation tank.

In addition, one side of the suction hose 20 is equipped with a backwashing device 21 connected to the pump to backwash the dredged inherent in the suction hose 20.

Meanwhile, in FIG. 5, the vacuum tank 40 is horizontally seated in the vehicle 4, and the cylinder 5 is mounted on the vehicle 4 so that the vacuum tank 40 horizontally seated in the vehicle 4 is vertically installed. It is also preferable.

Looking at the operating state of the dredging method, including the dehydration and precipitation using a vacuum tank according to the present invention made of a configuration as described above.

Dredging method including the dehydration and sedimentation using the vacuum tank according to the present invention, as shown in Figure 2 and 4, the dredging step (S10) of dredging sediment of the sewer pipe (1) to move the pipe back and forth and left and right The dredging device is dredged by the dredging device 10, the dredged water dredged in the dredging step (S10) is discharged to the outside of the pipeline through the suction hose 20 of the dredged water outflow step (S30), the outside of the pipeline The dredged outflow is discharged to the liquid phase of the dredging to one side through the vacuum tank 40, the vacuum pump 30 of the dredged stabilization step (S50) is settled and discharged semi-solids to the lower side. In addition, the semi-solid dredged outflow to the lower side of the vacuum tank 40 is discharged to the outside through the dehydration device 60 of the dredging treatment step (S70).

In addition, the dredged water stabilization step (S30) of the vacuum tank 40 has an upper side is formed in a cylindrical shape, the lower side is a funnel shape, the outlet is formed and the rotary valve is installed, the dredged water flowing from the suction pipe 42 is natural Dropping and sedimentation can be continuously discharged to process dredged water conveniently, the inner end of the suction pipe 42 is provided with a floating prevention portion (42a) formed in a curved shape on both sides dredging through the vacuum tube 51 It is possible to prevent the water from overflowing to the upper side, the rotating shaft 44 is provided with a drive motor to rotate in connection with the center of the fixed shaft 43 is connected to a plurality of horizontally inside the vertical tank body 41 Is formed, the first diffusion pipe 45 is connected to the upper side of the rotary shaft 44 is connected to the lower side can be stably dropped while dredged water flowing from the suction pipe 42 is separated depending on the specific gravity. , Wherein thereby a first diffusion tube (45) inner side of kkokkal shaped diffusion sphere 46 is provided with the first diffusion tube 45, the falling weight is evenly spread the dredged material, including a low fine sludge through the.

In addition, a shrinkage tube 47 fixed to the fixed shaft 43 and concentrically arranged downward is formed below the first diffusion pipe 45 so that dredged water having a high specific gravity falling is collected in the center. The lower side of the pipe 47 is connected to the rotary shaft 44 is provided with a second diffusion pipe 48 extended downward to diffuse the dredged water including the micro sludge having a low specific gravity falling down to separate the dredged water It is possible to, the lower side of the vertical tank body 41 is equipped with a dredged sediment prevention device that works in conjunction with the rotary shaft 44 can prevent dredged sediment to be sedimented to the bottom of the vacuum tank, The outlet of the vertical tank body 41 is provided with a rotary valve 50 to properly discharge the dredged water dropped to the capacity of the dewatering device to the bottom of the vertical tank body 41 can be easily discharged to the outside of the vacuum tank.

And, the upper side of the vacuum tank is provided with a coagulant input pipe 52 connected to the upper portion of the suction pipe 42 can be easily added to the flocculant to agglomerate dredged water including fine sludge flows into the flocculation can be rapidly settled. The outside of the first diffusion pipe 45 and the second diffusion pipe 48 is provided with a cleaning brush 52 to shake off the contaminants attached to the surface, so that it is not necessary to wash separately, and thus can be conveniently used.

And, the upper side of the vacuum tank is provided with a water level sensor 54 for detecting the level of dredged water introduced into the inside of the vacuum tank, the discharge pipe 55 for outflowing the liquid dredged to the outside on the upper side of the vacuum tank And, in conjunction with the water level sensor 54 is provided with a discharge pump 56 for draining the dredged water to the discharge pipe 55, if the liquid dredged liquid of the vacuum tank is higher than the predetermined height level sensor 54 Is sensed to operate the discharge pump 56 to be discharged to the discharge pipe (55).

In addition, the sedimentation tank 70 is introduced into the outside of the vacuum tank 40 while the liquid dredged water including the fine sludge floated inside the vacuum tank is introduced into the coagulant, and the liquid flows out to one side and the semi-solids flows out to the lower side. ) Can be drastically treated by dredging the dredged secondly to process dredged water continuously, thereby minimizing contamination by dredged water, and additionally connecting multiple sedimentation tanks in parallel to dredged water multiple times. It can be settled over and treated like general sewage to completely prevent contamination with dredged water.

In addition, the vacuum pump 30 is connected to the vacuum tank 40 is connected to a plurality of parallel to the lower side of the vacuum tube 51 in parallel to operate the vacuum pump according to the conditions of the site so that the sewage pipe is very deep and between the manhole and the manhole Even if the distance is far, it can be used conveniently.

In addition, one side of the suction hose 20 is equipped with a backwash spray nozzle 21 connected with a pump for backwashing to backwash the dredged water embedded in the suction hose 20, so that the suction hose is dredged. If the blockage or the pressure to be sucked into the dredging drops, the vacuum pump 30 is stopped and the pump for backwashing is operated to backwash the suction hose to drastically improve the dredging effect.

Meanwhile, as shown in FIG. 5, the vacuum tank 40 seats the vacuum tank 40 horizontally on the vehicle 4 and mounts the vacuum tank 40 horizontally seated on the vehicle 4. By mounting the cylinder 5 to vertically move, it is convenient to move to the site, it is possible to dredge and process dredged water regardless of the place.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

10; Dredging device 20; Suction hose
21; Backwash Spray Nozzle
30; Vacuum pump 40; Vacuum tank
41: tank body 42; suction
42a; Anti-injury 43; Fixed shaft
44; Axis of rotation 45; First Diffusion Tube
46; Diffuser 47; A miniature tube
48; Second diffusion tube 49; Dredged Sediment Prevention Device
50; Rotary valve 51; tube
52; Coagulant input pipe 53; Cleaning brush
54; Viewing window 55; Water level sensor
56; Discharge pipe 57; Discharge pump
60; Dewatering device 70; Sedimentation tank

Claims (9)

In the dredging method including the dehydration and sedimentation by dredging sediment in sewage pipe, dewatering and sedimentation,
Dredging step (S10) for dredging the dredged by the dredging device 10 for dredging sediment in the sewer pipe (1);
An inflow step (S30) connected to one side of the dredging device 10 to inject a dredged water in a sewage pipe 1 into a vacuum tank through a suction hose 20;
The liquid dredged from the suction hose 20 flows to one side through the vacuum tank 40, which is connected to the suction hose 20 on one side and the plurality of vacuum pumps 30 are mounted on the other side, and the semi-solids are lower side. Dredge stabilization step (S50) to discharge to;
In the dredged stabilization step (S50) of the vacuum tank 40 is provided with a dehydration device 60 for dewatering the semi-solid dredged discharged to the lower side, dredged water treatment step for discharging the dredged water to the outside ( S70); Dredging method containing dehydration and precipitation using a vacuum tank, characterized in that consisting of. The method of claim 1,
The vacuum tank 40 of the dredged stabilization step (S50) is vertically entered and the upper side is formed in a cylindrical shape, the lower side is a funnel shape, the tank body 41 formed with an outlet, one side is connected to the suction hose 20 The other side is bent inward from the upper side of the tank body 41 and the suction pipe 42 is provided with a floating prevention portion (42a) formed on both sides of the curved surface, and a plurality of horizontally connected to the inside of the tank body 41 Dredging flows from the suction pipe 42 connected to the fixed shaft 43, the rotary shaft 44 is provided with a drive motor to rotate in connection with the center of the fixed shaft 43, and the upper side of the rotary shaft 44 A first diffusion pipe 45 extended downward so that water stably falls, a diffuser 46 for spreading the dredged water falling from the inside of the first diffusion pipe 45 evenly, and the first diffusion pipe 46 1 quasi-falling fixed to the fixed shaft 43 from the lower side of the diffusion pipe 45 Small dredging pipe 47 which is concentrically piped downward so that the water is collected in the center, and solid dredged water which is connected to the rotating shaft 44 from the lower side of the narrowing pipe 47 falls to the center and contains micro sludge. The second diffusion pipe 48 allows the water to rise quickly, and dredged water to prevent dredged water from being interlocked with the rotary shaft 44 at the lower side of the vertical tank body 41 to be fixed to the vacuum tank. A device 49, a rotary valve 50 for properly draining dredged water precipitated from the lower end of the vertical tank body 41 to the lower control, and connected to the upper side from the outside of the tank body 41, the lower end The vacuum pump 30 is connected to the dredging method including dehydration and precipitation using a vacuum tank, characterized in that consisting of a vacuum tube 51 for sucking the dredged water. The method of claim 2,
The upper side of the tank body 41 is provided with a coagulant input pipe 52 to which a coagulant is injected to agglomerate the micro sludge having a low specific gravity contained in the dredged water which is connected to the upper portion of the suction pipe 42. Dredging method containing dewatering and sedimentation using vacuum tank. The method of claim 2,
Dredging and sedimentation and dehydration method using a vacuum tank, characterized in that the cleaning brush 52 to shake off the dredging attached to the surface of the first diffusion pipe 45 and the second diffusion pipe (48). The method of claim 2,
On the upper side of the tank body 41 is provided a water level sensor 54 for detecting the level of dredged water introduced into the tank body 41, the tank body 41 above the tank body 41 When the dredged liquid in the liquid is higher than the predetermined height of the discharge pipe (55) and the discharge pipe 55 is discharged to the dredged water to the discharge pipe 55 in conjunction with the water level sensor 54 inside the discharge pipe (55) Dredging method including the dehydration and precipitation using a vacuum tank, characterized in that the pump 56 is provided. The method of claim 2,
Outside the vacuum tank 40, the contaminated water including the micro sludge floated from the inside of the vacuum tank 40 is introduced while administering a flocculant, the liquid flows out to one side, and the flocculated semi-solids flows out to the lower side ( Dredging method including dehydration and precipitation using a vacuum tank, characterized in that 70) provided. The method of claim 1,
The vacuum pump 30 of the dredging stabilization step (S50) is connected to a plurality of parallel to the lower side of the vacuum tube 51 in parallel dehydration and sedimentation using a vacuum tank, characterized in that it can be used properly according to the dredging working conditions This includes dredging methods. The method of claim 1,
The vacuum tank 40 is horizontally seated in the vehicle 4, the vacuum tank, characterized in that the cylinder (5) is mounted so that the horizontally seated vacuum tank 40 is vertically mounted in the vehicle (4) Dredging method including dehydration and precipitation using. The method of claim 1,
Dehydration using a vacuum tank, one side of the suction hose 20 is equipped with a backwash spray nozzle 21 for spraying water at a high pressure to backwash the dredged water contained in the suction hose 20. And dredging method comprising precipitation.

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