JP2005282155A - Water bottom deleterious material removing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water bottom deleterious material removing device capable of sucking and recovering only a sludge layer including the organic content while moving on a water bottom surface layer by a ballast tank. <P>SOLUTION: This water bottom deleterious material removing device 1 is composed of a hood part 3 formed by expanding a lower opening part 2 in a flared shape opposed to the water bottom, a suction pump 5 arranged in a top part 4 of this hood part 3, the ballast tank 6 arranged along the peripheral edge of the hood part 3, and a jet nozzle 7 arranged along the peripheral edge of the opening part 2 in the the hood part 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mud collecting apparatus. More specifically, the present invention relates to a water bottom harmful substance removal apparatus that sucks only the surface layer of the bottom of a river, lake or harbor where organic matter is deposited.

  Organotin compounds are accumulated as seabed sludge on the seabed in fishing ports, fishing grounds and port areas, and high concentrations of tributyltin are detected in various marine products including fish in these waters. There are proven facts.

  Therefore, there is a need for the recovery and treatment of seabed sludge containing organotin compounds deposited on the seabed. This seabed sludge is collected by lowering the ladder from the trolley to the bottom, excavating the bottom with a cutter at the tip of the ladder, sucking up the raised bottom mud with water by a sand pump, and sinking it in a sedimentation basin. The thing is separated.

  However, with such a recovery method, the water area becomes cloudy by excavation of the cutter, and it is difficult to dissipate only the sludge rich in organic matter because the sludge rich in organic matter escapes. Moreover, since the sediment is dredged as it is, there is a problem that the amount of soil to be handled is large and the disposal of dredged soil becomes difficult.

Therefore, there is an apparatus shown in FIG. 8 for collecting only the sludge containing organic components.
In this mud collecting apparatus, a hood 102 is mounted on a self-propelled vehicle that runs on the bottom 101, and an opening 103 at the bottom of the hood 102 is opposed to the bottom 101. A jet nozzle 104 that floats sediment on the bottom of the water is disposed at the bottom of the hood 102, and a skirt 105 that closes the bottom of the hood 102 is provided at the bottom of the hood 102. The sand pump 107 is provided so that the suction port 106 is present at a height that allows collection of light organic components while avoiding heavy sand and inorganic soil particles due to the difference (see, for example, Patent Document 1). ).

JP-A-5-311696 (abstract, Fig. 1)

  However, in the above-mentioned mud collecting device, sediments on the bottom of the water are soared by a jet nozzle facing the bottom of the water, and heavy sand / inorganic soil particles and light organic matter are screened out, resulting in heavy sand / inorganic soil particles. Is settled, and only sludge with a light organic content is mixed with polluted water and sucked by a sand pump, and the skirt is a bell of the height required for separation in order to separate only the sludge with a light organic content Due to the shape and the sand pump disposed on the top, there is a problem that the water bottom becomes unstable. Therefore, there is a problem that the self-propelled vehicle for moving the skirt stably is large.

  Further, when a sludge layer containing light organic components is driven by a self-propelled vehicle, it is considered that the sludge layer soars due to an endless track, causing a problem that light sludge is dissipated. Furthermore, since the skirt has a bell shape, there is a problem that the processing efficiency is inferior to the conical shape.

  The present invention was devised in view of the above points, and is a water bottom harmful substance removal apparatus capable of sucking and collecting only a sludge layer containing organic components while moving on the surface of the water bottom by a ballast tank. It is intended to provide.

In order to achieve the above object, a water bottom harmful substance removing device according to the present invention is a device for sucking and dripping a sludge layer deposited on the water bottom with a suction means, wherein a suction pump is disposed at the top, and a lower opening is provided. A hood part facing the sludge layer, a jet nozzle provided at a lower part in the hood part, and collecting the sludge layer to the suction pump side;
A ballast tank is provided on the periphery of the hood.

  Here, the water-bottom harmful substance removing device is installed on the water bottom by a crane ship. Since the ballast tank is provided in the hood part of this bottom-bottom harmful substance removal device, the sludge depth of the hood part is adjusted, and organic substances are contained by jet water from the jet nozzle arranged at the periphery in the hood part. Only the surface layer portion is raised while being collected under the suction pump, and is sucked and collected by the suction pump.

  In addition, by making the suction pump adjustable, the depth of the bottom of the water can be adjusted freely.

  In the water bottom harmful substance removal apparatus of the present invention, the treatment efficiency of the recovered sludge is greatly improved by sucking only the sludge layer containing the organic matter deposited on the water bottom. Further, since the suction is performed only on the surface layer, the suction pump can be reduced in size, the apparatus itself can be reduced in size and weight, and the operation on the crane ship can be easily performed.

  In addition, by adjusting the bottom bottom hazardous substance removal device to sink to the sludge depth by the ballast tank, it becomes possible to carry out the sludge recovery work without dissipating the sludge layer when moving the bottom harmful substance removal device. .

Hereinafter, embodiments of the present invention will be described with reference to the drawings to provide an understanding of the present invention.
FIG. 1 is a plan view showing an example of a water bottom harmful substance removing apparatus to which the present invention is applied, FIG. 2 is a sectional explanatory view taken along the line AA in FIG. 1, and FIG. 3 is a sectional explanatory view taken along the line BB in FIG. .

  The water bottom harmful substance removal apparatus 1 shown here includes a hood part 3 formed by expanding a lower opening 2 in a trumpet shape facing the water bottom, a suction pump 5 installed on the top part 4 of the hood part 3, and a hood. It is comprised from the ballast tank 6 arrange | positioned along the periphery of the part 3, and the jet nozzle 7 installed along the periphery of the opening part 2 in the food | hood part 3. As shown in FIG.

Therefore, the hood portion 3 is provided with a hook locking ring 8 on a reinforcing rib 17 formed on the outer surface of the hood portion 3 in order to be lifted by a crane. An air vent cylinder 9 that is communicated with the inside of the hood 3 is disposed around the top 4 of the hood 3.
Further, a skirt portion 26 formed of a rubber body is provided along the lower end opening edge of the hood portion 3. The skirt portion 26 supplies water into the hood portion 3 and in the hood portion 3. The accumulated sediment is discharged.

  The suction pump 5 installed on the top 4 of the hood 3 is fitted with a pump box 10 to which the suction pump 5 is fixed with respect to the top 4 having a cylindrical shape. It is set as the structure fastened and fixed to. Therefore, the pump box 10 can move up and down in the top portion 4 and can be fixed by the fixing bolt 11 at an arbitrary position height.

  Further, the suction pump 5 has a suction port 12 formed in the lower portion thereof, and the polluted water sucked from the suction port 12 is conveyed on a barge ship (not shown) or on land (by a transfer hose 14 connected to a discharge pipe 13). It is conveyed to the processing layer installed in not shown.

  In addition, the ballast tank 6 is configured to be connected by joints 28 that protrude at regular intervals along the outer peripheral edge of the hood portion 3.

  Next, the jet nozzle 7 is provided with a jet nozzle pipe 15 having a ring shape along the circumference of the opening 2 in the hood 3. A water supply pipe 16 for supplying high-pressure water to the jet nozzle pipe 15 is connected in a continuous manner in a state of protruding vertically from the inside of the hood part 3 to the outside of the hood part 3.

  As shown in FIG. 4, the jet nozzle pipe 15 is formed with perforations of the jet nozzle 7 at regular intervals along the inner peripheral wall thereof. The jet nozzle 7 is formed with respect to the horizontal line of the jet nozzle pipe 15. And is drilled so that it faces downward at approximately 45 degrees.

  The jet nozzle spray angle can be freely adjusted according to the thickness and type of sludge accumulated on the bottom of the water, and its height can be freely adjusted.

  The ballast tank 6 is installed along the outer peripheral edge of the hood portion 3 and is formed by connecting eight cylindrical tubes 18 to form an octagon. The structure is divided into eight layers by being partitioned by the connecting portion. As shown in FIG. 5, an inlet 19 and an air vent 20 are formed above and below each cylindrical tube 18, and an adjustment valve (not shown) is provided at each air vent 20 of the cylindrical tube 18. Z.) is provided.

  The ballast tank is not necessarily formed in an octagonal shape, and may be a circular shape, a hexagonal shape, a rectangular shape, or the like as long as the balance and settlement of the hood portion in all directions can be adjusted. I do not care.

  In the underwater harmful substance removal apparatus of the present invention having the above-described configuration, as shown in FIG. 6, the wire 23 is locked to the hook locking ring 8 provided on the reinforcing rib 17 of the hood portion 3. It is lifted by the crane 22 installed in the.

  Here, the suction pump 5 is configured to operate by a generator 24 mounted on the carriage 21, and the polluted water sucked by the transfer hose 14 connected to the suction pump 5 is collected by the barge ship 25. is there.

Therefore, the subsidence amount of sludge containing organic components deposited on the bottom of the water before the construction is measured with a test piece, and the subsidence of the submarine harmful substance removal apparatus 1 is calculated based on the measured subsidence amount.
Next, the bottom 22 is removed by the crane 22 and the ballast tank 6 is adjusted to adjust the subsidence of the bottom 3 harmful substance removal device 1.

  The adjustment of the ballast tank 6 is such that water flows into the cylindrical tube 18 from an inlet and an air vent that are perforated in the cylindrical tube 18 of the ballast tank 6 for each jump, while an air vent with an adjustment valve is provided. A diver adjusts the inflow amount of water while adjusting the discharge amount of air into the cylindrical pipe 18 provided, so that the underwater harmful substance removal apparatus 1 is settled.

  Here, as shown in FIG. 7, the sludge layer A is connected to the water supply pipe 16 in a state where the opening 2 in the hood portion 3 of the submarine harmful substance removing device 1 sinks so as to be substantially in the same plane. The high-pressure water supplied from the water supply hose 26 is jetted from the jet nozzle 7 to the inner hood 3.

  The suction pump 5 operates simultaneously with the jet nozzle 7. Sludge is collected under the suction pump 5 from the peripheral edge in the hood 3 by jetting water from the jet nozzle 7, and only the sludge is sucked by the suction pump 5 and collected in the barge 25.

  After the sludge in the hood part 3 is sucked and collected in this way, the sludge layer is collected while moving the bottom-bottom harmful substance removing device 1 in the horizontal direction by the crane.

  In the present invention, the recovery operation of seabed sludge in harbors and the like has been described in detail. However, in a limited place such as a river or a lake, a basin is not required, and a water bottom harmful substance removal device is suspended from the shore by a crane. It is possible to work.

In the present invention, by adjusting the ballast tank of the bottom-bottom harmful substance removal device, the suction pump is configured to settle so as to be substantially flush with the sludge layer and to collect only the sludge containing organic components by the jet nozzle. This makes it possible to perform suction collection.
Furthermore, since water is supplied into the hood by jetting water from the jet nozzle, it is possible to greatly reduce water intake from the periphery of the hood through the skirt, and the water around the bottom-bottom harmful substance removal device. Can prevent turbidity.

  In addition, since the sludge in the hood part is shielded by the hood part, the sludge does not escape outside the hood part, and deposits other than organic substances in the hood part move outside the hood part through the skirt part during movement. As a result, the hood portion moves smoothly.

  Furthermore, the suction amount according to the sludge layer depth can be adjusted by adjusting the pump box on which the suction pump is mounted, and it can be used as a dredger at the bottom of the water by lowering the suction pump to the lowest end. It becomes possible.

It is a top view which shows an example of the water bottom harmful | toxic substance removal apparatus to which this invention is applied. It is sectional explanatory drawing in the AA line in FIG. It is sectional explanatory drawing in the BB line in FIG. It is expansion sectional explanatory drawing of the jet nozzle part in this invention. It is a section explanatory view of the ballast tank in the present invention. It is explanatory drawing which shows one usage example of the water bottom harmful | toxic substance removal apparatus of this invention. It is explanatory drawing which shows the action state of the water bottom harmful | toxic substance removal apparatus of this invention. It is explanatory drawing which shows an example of the conventional mud collection apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water bottom harmful substance removal apparatus 2 Opening part 3 Hood | hood part 4 Top part 5 Suction pump 6 Ballast tank 7 Jet nozzle 8 Hook locking ring 9 Air venting cylinder part 10 Pump box 11 Fixing bolt 12 Suction port 13 Discharge pipe 14 Conveyance hose 15 Jet Nozzle pipe 16 Water supply pipe 17 Reinforcing rib 18 Cylindrical pipe 19 Inlet 20 Air vent 21 Cargo ship 22 Crane 23 Wire 24 Generator 25 Barge ship 26 Water supply hose 27 Skirt part 28 Joint

Claims (2)

In a device that stirs and sucks the sludge layer deposited on the bottom of the water using suction means,
A suction pump is arranged at the top, and a hood portion with a lower opening facing the sludge layer,
A jet nozzle that is provided at a lower portion in the hood portion and causes the sludge layer to be accumulated and moved up toward the suction pump;
A water bottom harmful substance removing apparatus comprising a ballast tank installed on a peripheral edge of the hood. The apparatus for removing harmful substances from underwater according to claim 1, wherein the suction pump can be adjusted up and down.

Images