JP4037966B2 - Seabed purification equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seabed purification apparatus for purifying a contaminated seabed, and more particularly to a seabed purification apparatus capable of sucking up pollutants such as sludge deposited on the seabed together with seawater and separating and purifying the pollutants on the sea. .
[0002]
[Prior art]
Every summer, many people gather at various beaches and enjoy swimming. However, as in any place where people gather, the sandy beaches and the sea are contaminated with garbage that is discharged there. In the case of beaches, the problem is mainly sandy beach waste and sludge caused by sea pollution.
[0003]
Conventionally, a device called a beach cleaner for separating empty cans and garbage mixed in a sandy beach has been developed.
[0004]
These have a drive wheel for sandy beaches such as a caterpillar type, and scrapes dust and the like together with the sandy beach with a conveyor, etc., and separates them with a magnet or a screen to return only the sand to the sandy beach. In addition, there is also a method in which the sand from which trash is separated is washed with water and then returned to the sandy beach.
[0005]
In both cases, purification treatment was carried out while running on the sandy land. For this reason, the sludge deposited on the sea floor could not be treated.
[0006]
Also disclosed is an amphibious work vehicle so that the waterside portion can be treated (Japanese Utility Model Laid-Open No. 7-2527).
[0007]
In this amphibious vehicle, in addition to the land part, in the shallow part, it is possible to scrape and treat the seabed sludge with sand. However, since the sand on the seabed is scraped up by the conveyor, the sludge diffuses, and the sludge cannot be removed sufficiently.
[0008]
An apparatus that absorbs seabed sludge and purifies it at sea has also been developed. For example, in Japanese Patent Application No. 61-293328, an injection cylinder and a suction pipe are provided, and a bucket with a wheel having an open bottom surface is pulled by a ship to move the seabed, and seawater is sprayed on the seabed with an injection cylinder. Is suspended, and the sludge is sucked with a suction pipe to perform purification treatment on the ship.
[Problems to be solved by the invention]
As described above, the sand beach purification work such as a beach can be performed sufficiently with a beach cleaner or the like, and the land portion can be sufficiently cleaned, and the sand is replaced.
[0009]
However, underwater pollution is hardly purified in a neglected state because of cost and lack of an effective purification device.
[0010]
In a conventional seabed purification device, a conveyor-type sampling device expands the contamination due to diffusion during sludge collection.
[0011]
Further, in the case of the suction type sampling device described above, a method of releasing sludge by seawater injection is used because the processing range is small only by suction and the work efficiency becomes very poor.
[0012]
This is because high pressure injection of seawater to the seabed improves sludge release from the seabed, but conversely, the diffusion becomes intense and there are many parts that diffuse out of the suction range, thus limiting the injection pressure. There is a need. Moreover, since it is towed from a ship, it cannot be used unless the sea bottom is in a flat state without protrusions.
[0013]
The present invention has been made to solve the above-described problems, and aims to effectively purify sludge and the like deposited on the seabed in the sea such as a beach, and sprays seawater on the seabed. Submarine purification that can release sludge reliably and can absorb the sludge effectively without diffusing to the outside, and can effectively absorb sludge according to the conditions such as unevenness and inclination of the seabed. An object is to realize an apparatus.
[0014]
[Means for Solving the Problems]
Claim 1 is a submarine purification device for pumping up and purifying seabed sludge, and a sludge suction system for sucking up the seabed sludge while losing jetting, and levitation for purifying the sucked up sludge at sea. Type purification system and an operation arm for freely moving and operating a suction unit which is an injection loss part and a sludge suction part of the sludge suction system , and the suction pipe suction bottom is A submarine purification device characterized in that a leg portion having wheels is provided so as to be able to move while being maintained at a more constant distance, and the wheels have a rotating support shaft whose traveling direction can be freely changed. It is.
[0015]
The sludge suction system is provided with a suction unit for sucking sludge liberated together with seawater while jetting and stirring seawater to the sea floor, and is installed floating on the sea. The suction unit and the offshore control unit are connected by an injection pipe and a suction pipe. Moreover, the sucked sludge seawater is transferred to the floating purification system from the suction pump of the control unit.
[0016]
The control unit and the floating purification system may be provided independently or may be provided together.
[0017]
The levitation purification system may be any system as long as it can remove and purify the sludge from the seawater containing the sucked sludge and can continuously float on the sea for treatment.
[0018]
For example, it may be a small ship or a dredger provided with a float or a chamber, and may be provided with a purifying means such as a filter type, a sedimentation layer type, or a centrifugal type.
[0019]
The operating arm may be any arm-like operating device that can freely move and operate the suction unit in the sea. For example, an extendable and retractable cylindrical arm is provided so as to be pivotable. The thing to which the suction unit was attached may be used.
[0020]
The leg portion may be any one that is attached to the suction unit, is maintained at a certain height from the seabed, and has wheels that can be freely changed in direction.
[0021]
For example, a plurality of columns having a fixed length may be fixed to the outer periphery of the suction unit, and a caster may be attached to the lower end thereof. Further, each leg portion may have a telescopic structure so that the height can be adjusted. The wheel is preferably wide enough not to be buried even in sand.
[0022]
According to a second aspect of the present invention, in the sludge suction system, the suction unit is provided with an injection pipe for jetting seawater and a suction pipe for sucking seabed sludge together with seawater, and these pipes are integrated. The seabed purification apparatus is characterized in that it has a double structure, the inner cylinder is an injection pipe, and the outer cylinder is a suction pipe.
[0023]
The double pipe may be any pipe as long as the inner cylinder side is an injection pipe and the outer cylinder side is a suction pipe. For example, the inner cylinder may be cylindrical and the outer cylinder may be a rectangular column.
[0024]
Moreover, the injection | pouring part of an injection tube may spread in the shape of a tape, and what was provided with two or more by the shape of an elongate slit may be sufficient. The suction pipe portion of the suction pipe may be conically widened, or may be a box shape with an open lower surface.
[0025]
Since the periphery of the injection rod is a suction column, the sludge damaged by the injection is sucked before it diffuses outside.
[0026]
According to a third aspect of the present invention, in the above suction unit, a diffusion preventing skirt is provided for preventing the seabed sludge from diffusing outside the suction range of the suction unit due to the seawater injection of the injection pipe. It is a seabed purification device.
[0027]
The diffusion preventing skirt is provided for preventing the diffusion of sludge that has been spray-damaged, and may be any as long as it is provided so as to cover the periphery of the lower surface opening portion of the suction unit. The upper part of the rubber or resin sheet may be attached and covered on the outer periphery of the lower surface opening of the suction unit, and the lower part of the sheet may be in a free state.
[0029]
According to a fifth aspect of the present invention, in the above suction unit, an angle adjusting means for changing the suction direction of the seabed sludge according to the state of the seabed is provided.
[0030]
The angle adjusting means may be any one that can arbitrarily change the angle of the suction surface of the suction unit and can perform the suction operation while maintaining the state.
[0031]
For example, the injection pipe and suction pipe connected to the suction unit are flexible tubes, the tip of the operation arm and the upper part of the suction unit are connected by a rotatable support shaft, and the angle of the suction unit is controlled by wire operation from the operation arm. It may be one that can be adjusted.
[0032]
A sixth aspect of the present invention is the seabed purification apparatus, wherein the suction unit is provided with buoyancy adjusting means.
[0033]
The buoyancy adjusting means may be any means that can increase or weaken the buoyancy of the suction unit. For example, a float may be attached to the suction unit to increase the buoyancy, or an air chamber may be provided so that the buoyancy can be freely adjusted.
[0034]
According to a seventh aspect of the present invention, in the injection pipe for injecting seawater provided in the suction unit, vortex generating means is provided at an outlet portion in the injection pipe so that the jet becomes a spiral flow. It is a seabed purification device.
[0035]
The vortex generating means may be any one as long as the jet jetted from the jet pipe becomes a vortex. For example, a rotary blade may be provided at the outlet portion in the injection tube, or a fin may be attached spirally so that a vortex is generated on the inner surface of the outlet portion of the injection tube. The rotary blades and fins may be fixed to the injection pipe or may be rotatably attached.
[0036]
An eighth aspect of the present invention is a seabed purification apparatus, characterized in that, in an injection pipe for injecting seawater provided in the suction unit, an air injection means is provided at an outlet portion in the injection pipe.
[0037]
Any air injection means may be used as long as it can inject air into the injection pipe. For example, a thin nozzle that opens toward the outlet side in the injection pipe may be provided, and an air pipe may be connected to the nozzle.
[0038]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, in order to maintain the beautiful sea and to further develop the tourism industry, the Okinawa sea can be realized in recent years with the development of the tourism and leisure industry. Recognizing that there is an urgent need to develop a method for purifying the sea, we have developed a practical purification device for sludge in the underwater part of the beach.
[0039]
As a result of many trials and errors at the site, the sludge liberation by the jet stirring method, the pumping recovery by the suction method, and the ocean purification method by the floating purification equipment are most suitable for practical use in the purification method of the seabed part of the beach. And the invention has been completed.
[0040]
Embodiments of the present invention will be described below.
FIG. 1 is a schematic configuration diagram showing an embodiment of a seabed purification apparatus according to the present invention, and shows that a purification process for a seabed portion of a shallow beach of a beach is performed using this apparatus.
[0041]
This submarine purification apparatus is composed of a levitated gantry 4 on which a control unit 1 of a sludge suction system, an operation arm 2 and a purification system 3 are installed, and a suction unit 5 connected to the tip of the operation arm 2. Yes.
[0042]
The control unit 1 of the sludge suction system includes a discharge pump 6 for transferring high-pressure seawater to the suction unit 5, a suction pump 7 for sucking up seawater containing sludge from the suction unit 5, and these pumps. A control device 8 for controlling is provided.
[0043]
Since the levitation base 4 is provided with an air chamber 9 and buoyancy is adjusted, it constantly floats on the sea surface and does not sink with the pumped seawater. Moreover, 4a is a wheel of a floating type mount frame.
[0044]
The operation arm 2 is for operating the suction unit 5 in the sea, and can be operated up and down and turned freely, and can be expanded and contracted.
[0045]
In addition, the operation arm 2 is installed at one end of the floating gantry 4, and by extending the operation arm 2, the suction unit 5 can be moved to the vicinity of the undulation. The suction unit 5 is provided with an air chamber 17 for adjusting buoyancy (FIG. 3), and hardly receives a load, so that the operation arm 2 can be moved and operated very smoothly.
[0046]
Moreover, the sludge suction operation of the surrounding seabed can be performed while the floating type gantry 4 is stopped at a certain position. In the conventional suction type purification apparatus, since the suction operation is performed by simply pulling the suction unit, only the rear portion of the towed ship can perform the sludge suction operation.
[0047]
The purification system 3 is a sludge purification device by sedimentation separation using a solidifying agent, and includes a plurality of precipitation tanks 11 and a solidifying agent injection device (not shown), and the purified seawater overflows. Returned to the sea. The separated sludge can be reused by adjusting the water content and using it as an organic fertilizer, or by solidifying it with a solidifying agent and using it as an organic fish reef.
[0048]
In this embodiment, a purification system using a sedimentation tank is used. However, any system can be used as long as it can purify seawater by separating sludge such as centrifugal sludge separation or filtration separation.
[0049]
The suction unit 5 will be described with reference to FIGS. 2 is an overall external view, FIG. 3 is a longitudinal sectional view, (1) is a longitudinal sectional view showing the structure of a suction unit, and (2) is a schematic configuration diagram of an automatic air valve. (3) is a longitudinal sectional view showing another embodiment of the injection pipe.
[0050]
The suction unit 5 is a cylindrical tube having an open bottom surface, and has a double-pipe suction port provided therein. The inner tube is an injection tube 13 and the outer tube is a suction tube 14. ing.
[0051]
Further, a plurality of rubber skirts 12 are attached to the outer peripheral portion of the lower surface open portion of the unit so as to surround the entire periphery. Moreover, the leg part 15 is provided in this unit, The caster 16 is attached to the lower end part.
[0052]
An air chamber 17 is provided for adjusting the buoyancy of the unit, and the air in the chamber can be adjusted by an automatic air valve 17a.
[0053]
That is, as shown in FIG. 3 (2), the wheel 16 of the leg portion 15 is connected to the pressure sensor 17b in the automatic air valve 17a, and the compressor installed on the floating pedestal 4 when the pressure exceeds a certain level. High-pressure air is supplied into the air chamber 17 by the high-pressure air pipe 17c connected to (not shown), and the seawater in the chamber is drained from the water inlet 17d, and the buoyancy is increased. On the contrary, when the pressure applied to the pressure sensor 17b by the wheel 16 becomes a certain pressure or less, the air in the air chamber 17 is exhausted from the air outlet 17e, and seawater flows in from the water inlet 17d, and the buoyancy is reduced.
[0054]
Further, a mesh filter 40 is provided so as to be inclined from the injection tube 13 and reach the inner wall surface of the suction unit main body. A plurality of drain holes 41 are formed near the outer peripheral wall surface of the mesh filter 40.
[0055]
In FIG. 3 (3), an air nozzle 18 is provided in the injection tube 13 so as to open in the outlet direction. The air nozzle 18 communicates with the sea through an air pipe 19.
[0056]
The sludge purification work using this seabed purification apparatus will be described. The suction unit 5 is moved to the seabed portion to be purified by the operation arm 2.
[0057]
Here, the discharge pump 6 is operated, high-pressure seawater is jetted from the jet pipe 13 of the suction unit 5 to the seabed, and the deposited sludge is freely stirred. The liberated sludge rises on the outer periphery so as to convect the inside of the suction unit.
[0058]
Here, large dust is removed through the mesh filter 40. The sludge that has passed through the mesh filter 40 further rises and reaches the suction pipe.
[0059]
Here, the sludge released by the suction pipe 14 is sucked together with the seawater. Since the skirt 12 covers the outer periphery of the lower surface of the suction unit 5, the loosely stirred sludge is sucked up from the suction pipe 14 without diffusing outside the suction unit 5.
[0060]
In addition, sand and the like in the sludge that has risen as a result of diffusion and free fall naturally during the rise, and fall to the seabed from the drain hole in the outer periphery of the mesh filter 40.
[0061]
While continuing to suck the sludge, the operation arm 2 is operated to move the suction unit 5 to continue the operation. The suction unit 5 is provided with an air chamber 17, and the buoyancy is adjusted. The suction unit 5 is adjusted so as to sink slightly, so that the load applied to the operation arm 2 during movement becomes very small. Yes.
[0062]
In addition, even when there are protrusions such as rocks on the sea floor 10, casters 12 that can freely change the direction are attached to the legs 15, and the lower part of the suction unit 5 is made of a rubber that is elastic. Since the skirt is used, it is possible to smoothly and efficiently work without worrying about being caught by protrusions such as rocks.
[0063]
The sludge seawater sucked up by the suction pipe 14 passes through the operation arm 2 and is sent from the suction pump 7 to the sedimentation tank 11 of the purification system 3. Here, the solidifying agent is injected by a solidifying agent injection device (not shown). Only the sludge in the sludge seawater solidifies and settles and accumulates in the sedimentation tank 11, and only the seawater overflows and returns to the sea. The sludge separated and separated is adjusted for moisture and reused as organic fertilizer.
[0064]
FIG. 4 is a schematic view showing another embodiment of the suction unit, (1) is an external perspective view, (2) is a cross-sectional view of the AA section, and (3) is B- It is sectional drawing of the B section.
[0065]
This suction unit 20 is a box-type suction unit. Similar to the cylindrical suction unit 5, a leg portion 22 having a skirt 21 for preventing the diffusion of sludge and a caster 21 is provided.
[0066]
At the top of the suction unit 20 main body, a double tubular injection pipe 23 (inner side) and a suction pipe 24 (outer side) are provided.
[0067]
An injection cylinder 25 is provided on the outlet side of the tip of the injection tube 23. The injection cylinder 25 is a cylinder connected to the injection pipe 23 in a T-shape, and a number of slit-like injection ports 26 are provided in the lower part.
[0068]
In this suction unit 20, high-pressure seawater is jetted from a large number of jet ports 26 of the jet cylinder 25, and the accumulated sludge on the seabed 27 is stirred and released. The released sludge is pumped together with seawater by a suction pipe 24 to a purification system on the sea and purified.
[0069]
Since the suction processing width of the suction unit 20 can be widened, the suction unit 20 is suitable for working while moving in a certain direction.
[0070]
FIG. 5 is a schematic view showing another embodiment of the injection pipe of the suction unit, and has a structure in which the jet becomes a spiral flow.
[0071]
In (1), a four-blade propeller 28 is provided in the vicinity of the outlet in the injection pipe 27. In this embodiment, the propeller 28 is fixed, but it may be provided to rotate.
[0072]
(2) is one in which three fins 29 with blade-like protrusions are spirally attached to the inner wall surface near the outlet of the injection tube 27 so that a spiral flow is generated.
[0073]
As described above, when a swirl is generated in the jet, stubborn sludge adhering to the seabed can be released.
[0074]
FIG. 6 is a schematic view showing an embodiment of the angle adjusting device of the suction unit. (1) is a schematic structural diagram, and (2) is a diagram showing an angle adjustment operation.
[0075]
The connecting portion 31 at the top of the suction unit 30 is connected by a connecting portion 33 at the tip of the operation arm 32 and a support shaft 34 and is rotatable. A pulley 35 is fixedly provided on the support shaft 34, and a drive belt 38 is provided between the support shaft 34 and a pulley 36 provided on a rotating device 37 of the operation arm 32.
[0076]
The pulley 36 on the rotating device 37 side is controlled so as to be rotated both forward and backward by a drive motor, and the angle of the suction unit 30 can be adjusted by the rotational drive of the drive motor.
[0077]
Further, when the pulley 36 on the rotating device 37 side is locked, the angle of the suction unit 30 is kept constant even if the operation arm 32 is moved up and down. By adjusting the angle once, the suction unit 30 is constantly maintained at the inclination angle of the seabed even if the operation arm 32 is rotated. Therefore, it is not necessary to adjust the angle every time the movement is performed, and the work can be performed efficiently. become able to.
[0078]
【The invention's effect】
If comprised as shown in Claim 1, seabed sludge can be reliably removed by jet stirring. In addition, since the treatment is performed at sea, there is no need to extend the pipe to the land, and the pump can be downsized. In addition, since the suction unit can be operated freely with the operation arm, it is possible to reliably perform suction work even in shallow water where the levitation base cannot approach, and work while the levitation base is stopped. Since the work can be performed, the sludge can be reliably purified.
[0079]
Claim 2 is provided with an injection pipe for injecting seawater and a suction pipe for sucking up seabed sludge together with seawater. These pipes are integrated into a double structure. Since the cylinder is an injection pipe and the outer cylinder is a suction pipe, piping can be simplified and the size can be reduced. Moreover, since it sprays to the center and it attracts | sucks from the circumference | surroundings, since it convects inside a suction unit, it becomes regular spreading | diffusion and it becomes easy to attract sludge.
[0080]
Claim 3 can prevent the sludge from diffusing outside the suction unit by providing the diffusion preventing skirt. In addition, workability is greatly improved because it is not caught by protrusions on the seabed.
[0081]
According to the fourth aspect of the present invention, since the leg portion having the universal wheel is provided, the fixed height is maintained, so that there is no problem that the projection on the seabed hits the spray pipe or the suction pipe, and the problem is free. Since it is a wheel, there is no problem of being caught by the projections on the seabed, so the moving operation can be performed while freely sucking.
[0082]
According to the fifth aspect of the present invention, since the suction unit angle adjusting means is provided, an appropriate operation can be performed according to the condition of the seabed, and the angle between the seabed and the lower surface of the suction unit does not match. The problem that the sludge is diffused can be prevented, and the sludge can be surely sucked.
[0083]
According to the sixth aspect, since the buoyancy adjusting means is provided in the suction unit, the suction unit becomes lighter, the load on the operation arm is reduced, and the operation can be performed smoothly. In addition, since it is not necessary to install the operation arm at the center of the floating cradle, the floating cradle can be downsized.
[0084]
According to the seventh aspect of the present invention, the submarine sludge can be surely released by providing the eddy current generating means at the outlet portion in the injection pipe. Moreover, by providing in an exit part, a swirl flow can be effectively injected to the seabed.
[0085]
According to the eighth aspect of the present invention, the air injection means is provided at the outlet portion in the injection pipe, so that the jet flow can have a bubbling effect, and the seabed sludge can be strongly released by this bubbling effect.
[0086]
As described above, according to the present invention, the sludge, which is a contaminant deposited on the seabed such as a beach, can be effectively agitated and separated, separated and purified, and it is small in size, has good workability and is practical. A seabed purification apparatus can be provided.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an embodiment of a seabed purification apparatus according to the present invention.
FIG. 2 is a schematic view showing an embodiment of a suction unit according to the present invention.
FIG. 3 is a schematic view showing the structure of a suction unit according to the present invention.
FIG. 4 is a schematic view showing another embodiment of the suction unit according to the present invention.
FIG. 5 is a schematic view showing another embodiment of the injection pipe of the suction unit according to the present invention.
FIG. 6 is a schematic view showing an embodiment of the angle adjusting means of the suction unit according to the present invention.
[Explanation of symbols]
1 Sludge suction system control unit 2 Operation arm 3 Purification system 4 Floating mount 5 Suction unit (tubular type)
9 Air chamber 12 Skirt 13 Injection pipe 14 Suction pipe 15 Leg 16 Caster 18 Air nozzle 20 Suction unit (box type)
23 Injection pipe 25 Injection cylinder 26 Injection port 24 Suction pipe 28 Propeller 29 Fins 35, 36 Pulley 38 Drive belt

Claims (7)

In the seabed purification equipment that pumps up the seabed sludge and purifies it,
A sludge suction system for sucking up seabed sludge while spraying and stirring;
A floating purification system to purify the sucked sludge at sea,
An operation arm for freely moving and operating a suction unit which is a jet stirring unit and a sludge suction unit of the sludge suction system in the sea ,
In the suction unit, a leg portion having wheels is provided so that the suction pipe of the suction pipe can be moved while being maintained at a certain distance from the seabed, and the wheel rotates so that the traveling direction can be freely changed. A seabed purification apparatus having a support shaft . In the sludge suction system, the suction unit is provided with an injection pipe for jetting seawater and a suction pipe for sucking up the seabed sludge together with seawater.
These pipes are integrated into a double structure,
2. The seabed purification apparatus according to claim 1, wherein the inner cylinder is an injection pipe and the outer cylinder is a suction pipe. The said suction unit is provided with the diffusion prevention skirt for preventing that a sea bottom sludge diffuses out of the suction range of a suction unit by the seawater injection of an injection pipe. Item 3. The seabed purification device according to any one of items 2 to 3. The said suction unit is provided with the angle adjustment means for changing the suction direction of a seabed sludge according to the condition of a seabed, The claim in any one of Claim 1 to 3 characterized by the above-mentioned. Seabed purification equipment. The buoyancy adjustment means is provided in the said suction unit, The seabed purification apparatus in any one of the Claims 1-4 characterized by the above-mentioned. The jet pipe for jetting seawater provided in the suction unit is characterized in that a vortex generating means is provided at the outlet portion in the jet pipe so that the jet becomes a spiral flow. The seabed purification apparatus according to any one of claims 1 to 5 . In injection pipes for injecting sea water provided in the suction unit, either of claims 1, wherein the air injection means is provided in Delo portion of the injection tube to Claim 6 The seabed purification apparatus according to the item.

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