JP5525015B2 - Spilled oil recovery device and spilled oil recovery ship - Google Patents

Description

  The present invention relates to a spilled oil recovery apparatus and a spilled oil recovery ship, and more particularly, to a spilled oil recovery apparatus that can be easily mounted on a ship and can easily recover spilled oil not only in the ocean but also in a narrow harbor. It relates to a spilled oil recovery ship.

  Oil and other oil spills on the sea caused by ship accidents destroy the ecosystems of living organisms in the water and on the coast, causing enormous environmental damage. For this reason, the spilled oil needs to be quickly recovered.

  Conventionally, as a device for recovering spilled oil, a screw is installed in Patent Document 1 such that the axial direction is perpendicular to the sea, so that the high-viscosity oil on the sea is scraped off by the rotation of the screw. A spilled oil recovery device has been proposed.

  Patent Document 2 discloses a spilled oil recovery system in which an arm with a semi-columnar structure containing a screw is installed so as to be in contact with the sea from the side of the hull, and an oil recovery tank is provided at the inner end of the arm. A device has been proposed. The screw extends long in the axial direction of the arm, and by rotating the screw, the spilled oil at sea is moved toward the hull along the axial direction of the screw and is collected in the collection tank at the inner end of the screw. Like to do.

JP 2003-53338 A JP-T-2006-517209

  The spilled oil recovery device described in Patent Document 1 has a structure in which the screw is installed in a direction perpendicular to the sea surface, and is therefore unsuitable for recovering spilled oil spreading over a wide range on the sea.

  Further, in the spilled oil recovery device described in Patent Document 2, it is considered that the spilled oil can be recovered over a wide range at both sides of the hull because the arm extends horizontally with respect to the sea surface. However, the apparatus must be large, and ships that can be mounted are limited to large ships, and there is a problem that it is completely unsuitable for collecting spilled oil generated in a narrow harbor. Moreover, since the length direction of the arm (= direction of oil movement due to the rotation of the screw) intersects the direction of travel of the hull, if the spilled oil moves up and down due to waves, it partially gets over the arm and is recovered. There is also a problem that leakage tends to occur.

  Then, this invention makes it a subject to provide the spilled oil collection | recovery apparatus which can be easily mounted in a ship and can collect | recover spilled oil not only in the ocean but also in a narrow harbor.

  Moreover, this invention makes it a subject to provide the spilled oil recovery ship provided with the spilled oil recovery apparatus which can collect | recover spilled oil easily not only in the ocean but in a narrow harbor.

  Other problems of the present invention will become apparent from the following description.

  The above problems are solved by the following inventions.

(Claim 1)
A screw is rotatably accommodated along the axial direction inside a cylindrical casing having an oil recovery port at the front end in the axial direction and a discharge port for oil recovered at the rear end side. A screw conveyor for transferring from the recovery port to the discharge port by the rotational force of the screw ;
A spilled oil recovery apparatus comprising: a mesh conveyor that separates water and oil in a process of conveying the oil discharged from the discharge port .

(Claim 2)
The spilled oil recovery apparatus according to claim 1, further comprising a first flap plate for scooping the spilled oil toward the recovery port, the tip side being provided so that the angle can be adjusted in the vertical direction.

(Claim 3)
3. The spilled oil recovery device according to claim 1, further comprising a second flap plate that is provided such that a tip end side thereof is adjustable in a left-right direction and collects the spilled oil spreading on the water toward the recovery port. .

(Claim 4)
The spilled oil recovery device according to claim 1, 2 or 3, wherein a plurality of the screw conveyors are arranged in parallel.

(Claim 5)
A spilled oil recovery ship comprising the spilled oil recovery device according to any one of claims 1 to 4.

  ADVANTAGE OF THE INVENTION According to this invention, the spilled oil collection | recovery apparatus which can be easily mounted in a ship and can collect | recover spilled oil not only in the ocean but also in a narrow harbor can be provided.

  Furthermore, according to the present invention, it is possible to provide a spilled oil recovery ship equipped with a spilled oil recovery device that can easily recover spilled oil not only in the ocean but also in a narrow harbor.

The perspective view which shows the spilled oil recovery apparatus which concerns on this invention The top view which shows the spilled oil collection | recovery apparatus based on this invention Side surface sectional drawing which shows the spilled oil recovery apparatus which concerns on this invention Partial plan view of the tip side of the spilled oil recovery device (A) (b) is a figure explaining each aspect of the spilled oil recovery ship which concerns on this invention Partial sectional view showing a mode of a recovery unit for recovering discharged oil water Partial sectional view showing another aspect of the recovery unit for recovering discharged oil water Partial sectional view showing another aspect of the recovery unit for recovering discharged oil water

  Hereinafter, modes for carrying out the present invention will be described.

  1 is a perspective view showing a spilled oil recovery device according to the present invention, FIG. 2 is a plan view showing the spilled oil recovery device according to the present invention, and FIG. 3 is a side sectional view showing the spilled oil recovery device according to the present invention. 4 is a partial plan view of the front end side of the spilled oil recovery device.

  The spilled oil recovery apparatus 1 shown in the present embodiment includes a water collecting plate 2, a plurality of screw conveyors 3 arranged in parallel on the water collecting plate 2, and a drive motor 4 that drives the screw conveyor 3. .

  The water collecting plate 2 is for collecting oil water toward the screw conveyor 3. A flat lower plate 21 having a plurality of screw conveyors 3 installed on the upper surface, and both sides of the lower plate 21, Along with the length direction of the plurality of screw conveyors 3, there is a side plate 22 erected so as to face the plurality of screw conveyors 3.

  The lower plate 21 is formed to have a fan shape whose width gradually increases from the top to the bottom in FIG. The plurality of screw conveyors 3 are arranged side by side so that the lower side in the figure has a fan-like shape extending in the horizontal direction, similarly to the planar shape of the lower plate 21. As will be described later, since the lower side in FIG. 2 is the oil water recovery side, the plurality of screw conveyors 3 are arranged side by side so that the recovery side expands in the lateral direction, thereby diffusing oil water Can be efficiently recovered.

  Each side plate 22 is formed such that the standing height from the lower plate 21 gradually increases as it goes to the tip side (lower right side in FIG. 1) immersed under the water surface. Thus, the water collecting plate 2 surrounds the lower and both side portions of the plurality of screw conveyors 3 and advances in a state where the tip side is immersed under the water surface and the lower plate 21 is disposed obliquely with respect to the water surface. When it does, it functions so that oily water containing spilled oil can be smoothly collected inside.

  In order to further enhance the oil collecting function of the water collecting plate 2, the angle of the vertical direction can be adjusted so as to scoop up the oil water by being immersed under the water surface at the tip of the lower plate 21 in the water collecting plate 2. It is preferable to have the first flap plate 21a.

  The first flap plate 21 a is a flat plate having a length in the width direction of the lower plate 21, and is rotatably attached to a hinge 21 b provided at the tip edge of the lower plate 21. As a result, the first flap plate 21a is provided so that the angle can be adjusted in the vertical direction as shown in FIG. By adjusting the height, the recovery efficiency of the spilled oil can be further increased.

  As a method for adjusting the angle of the first flap plate 21a, for example, a wire is attached to the tip of the first flap plate 21a, and the angle is manually set to an optimum angle by winding the wire. Alternatively, the angle may be automatically adjusted by winding the wire with a drive motor (not shown).

  The angle adjustment range of the first flap plate 21a is, for example, 45 ° downward from a state that is flush with the lower plate 21, as shown in FIG. Can do.

  Similarly, in order to further enhance the water collecting function of the oil collecting plate 2, the spilled oil spreading on the water is efficiently directed toward the recovery port of the screw conveyor 3 at the tip of each side plate 22 in the water collecting plate 2. It is also preferable to have a second flap plate 22a that can be adjusted in the left-right direction.

  The second flap plate 22 a is a flat plate extending in the height direction of the side plate 22, and is rotatably attached to a hinge 22 b provided at the leading edge of the side plate 22. Thereby, as shown in FIG. 2, the second flap plate 22a is provided so as to be capable of adjusting the angle in the direction in which the second flap plate is expanded (the direction opposite to each other), and according to the degree of the spread of the spilled oil, The recovery efficiency of the spilled oil can be further increased by adjusting the extent of the left and right ends of the tip.

  As a method for adjusting the angle of the second flap plate 22a, for example, a wire is attached to the tip of the second flap plate 22a, and the angle is manually set to an optimum angle by winding the wire. Alternatively, the angle may be automatically adjusted by winding the wire with a drive motor (not shown).

  The angle adjustment range of the second flap plate 22a is, for example, a range of 45 ° inward from a state perpendicular to the side plate 22 (shown by a one-dot chain line in FIG. 4) as shown in FIG. can do.

  A bracket 5 is rotatably provided at the rear end of the water collecting plate 2 via a hinge 51. The bracket 5 is a part to be an attachment part for attaching the spilled oil recovery device 1 to a ship, and for example, an attachment hole 52 is provided. Reference numeral 53 denotes a hanging metal fitting for hanging by a hanging wire 53a or the like when attached to a ship, for example, as shown in FIG. The bracket 5 can be appropriately changed according to the type of ship to which the spilled oil recovery apparatus 1 is attached.

  The screw conveyor 3 includes a long cylindrical casing 31 in which a screw 32 is rotatably accommodated along the axial direction. The lower plate is oriented so that the tip side is oriented toward the tip side of the water collecting plate 2. A plurality of lines 21 are arranged side by side. The casing 31 has an opening at the front end in the axial direction to be an oil water recovery port 33, and an oil water discharge port 34 recovered by the rotation of the screw 32 on the lower surface on the rear end side.

  Here, although what has six screw conveyors 3 is illustrated, in this invention, it can increase / decrease suitably, regardless of the number.

  Moreover, although the length of the screw conveyor 3 can be 3m-5m, for example, a diameter can be 100mm-1000mm, for example, the specific length and diameter mount this spilled oil recovery apparatus 1. It can be changed as appropriate according to the size of the ship.

  A cutout opening 35 for allowing inflow of oil and water is formed in the upper part on the front end side of the casing 31 by partially cutting the wall surface of the casing 31 so as to be continuous with the recovery port 33. Here, the cutout opening 35 is formed by being cut obliquely so that the opening width gradually decreases from the upper half of the recovery port 33, which is the front end opening of the casing 31, toward the rear end side of the casing 31. Yes. Accordingly, the distal end side of the screw 32 is opened toward the distal end and the upper portion at the site of the recovery port 33 and the cutout opening 35.

  A length L (see FIG. 4) of the cutout opening 35 along the length direction of the screw conveyor 3 can be set to, for example, 0.5 m to 3 m.

  Between the side plates 22 and 22 and the screw conveyors so as to be located on the front end side of the water collecting plate 2 and on the rear end side of the recovery port 35 of each screw conveyor 3 and the notch opening 35 continuous therewith. An oil / water overflow prevention plate 23 is provided so as to close the space between the three. The oil / water overflow prevention plate 23 is preferably provided in the present invention in order to prevent the oil / water collected on the front end side of the water collection plate 2 from overflowing to the rear end side in the axial direction of the screw conveyor 3.

  The oil collected at the front end side of the water collecting plate 2 needs to be taken into the casing 31 by the recovery port 33 of the screw conveyor 3 and the cutout opening 35 preferably provided. 3 overflows to the rear end side in the axial direction, it cannot be efficiently taken into the casing 31 by the recovery port 33 or the cutout opening 35. By providing the oil / water overflow prevention plate 23, it is possible to stop the oil / water that is about to overflow to the rear end side, so that the collected oil / water can be collected more efficiently by the screw conveyor 3.

  The lower plate 21 of the water collecting plate 2 corresponding to the discharge port 34 of each screw conveyor 3 is provided with an opening 24 that communicates with the discharge port 34 and is collected by the screw conveyor 3 and discharged from the discharge port 34. The discharged oil water is discharged under the water collecting plate 2. In this opening 24, a flange portion 25 for storing the recovered oil / water is disposed across each opening 24, and the oil / water accommodated in this flange 25 passes through the recovery pipe 26 and is a recovery pump. By driving 27, it is transferred to an oil recovery tank (not shown).

  The drive motor 4 is provided for each screw conveyor 3 and is connected to the rear end of the screw 32 of each screw conveyor 3 to drive the screw 32 to rotate. The rotational speed of the drive motor 4 can be changed. Further, by providing the drive motor 4 for each screw conveyor 3, each screw conveyor 3 can be driven individually. Therefore, for example, the number of driven oils can be adjusted according to the degree and amount of spilled oil diffusion, or the rotational speeds of the screws 32 can be made different for each screw conveyor 3. Further, even when a problem occurs in any of the plurality of drive motors 4, the recovery operation of the spilled oil can be continued by the remaining drive motors 4.

  The tip of the screw 32 is rotatably supported by a bearing 36 provided at the tip of the casing 31 so as to traverse the recovery port 33.

  Floating bodies 6 for adjusting the buoyancy on the front end side of the water collecting plate 2 are respectively attached to the outside of the side plates 22 of the water collecting plate 2. By adjusting the buoyancy on the front end side of the water collecting plate 2 with the floating body 6, it is possible to adjust the immersion depth position below the water surface on the front end side of the water collecting plate 2 and to follow the vertical movement of the wave. Since the water collecting plate 2 can be moved up and down around the hinge 51, the immersion depth below the water surface on the tip side of the water collecting plate 2 can be kept substantially constant.

  The floating body 6 may be attached in advance so as to have a predetermined buoyancy, or the buoyancy can be adjusted as appropriate by connecting to an air supply source (not shown) so that air can be supplied and exhausted. It is also preferable to do.

  The number of the floating bodies 6 is not particularly limited, and the attachment positions may be attached to, for example, the lower surface side of the lower plate 21.

  Next, the effect | action at the time of the spilled oil collection | recovery by this spilled oil recovery apparatus 1 is demonstrated.

  As shown in FIG. 3, the leading end side of the spilled oil recovery device 1 is immersed below the water surface W, and the lower plate 21 is disposed so as to be inclined with respect to the water surface W. Thus, the screw conveyors 3 arranged side by side on the lower plate 21 are also arranged such that the length direction thereof is oblique with respect to the water surface W. At this time, the screw conveyor 3 is disposed obliquely with respect to the water surface W so that the angle formed by the axial direction of the screw conveyor 3 and the water surface W is 15 ° to 45 °, preferably 20 ° to 30 °. If necessary, each screw conveyor 3 may have its collection port 33 side immersed under the water surface.

  At this time, it is preferable that the immersion depth on the front end side of the water collecting plate 2 is appropriately adjusted so as to be the optimum depth by adjusting the buoyancy of the floating body 6. In addition, it is preferable to appropriately adjust the vertical angle of the first flap plate 21a according to the type of the spilled oil WO on the water surface W and the degree of spill. Furthermore, it is preferable to appropriately adjust the left and right spreading angles of the second flap plate 22a according to the degree of spreading of the spilled oil WO on the water surface W.

  When the tip side is immersed below the water surface W, each drive motor 4 is driven to rotate the screw 32 of each screw conveyor 3, and in this state, the spilled oil recovery device 1 is driven by, for example, the propulsive force of the ship as indicated by the arrow in FIG. The water is scooped up in the direction, and the spilled oil WO on the water surface W is scooped up. The scooped oil water is taken into the casing 31 from the recovery port 33, transferred toward the rear end in the casing 31 by the rotational force of the screw 32, discharged from the discharge port 34, and stored in the gutter 25.

  In this embodiment, the upper end of the front end of the casing 31 is continuously opened to the recovery port 33 by the notch opening 35, so that the spilled oil WO that is scooped up by the front end side of the water collecting plate 2 is raised. The contained oil water is taken into the casing 31 through both the recovery port 33 and the notch opening 35 continuous therewith.

  Further, the scooped-up oil water tends to rise as it is in the water collecting plate 2 toward the rear end side, but in this embodiment, the oil water which is about to overflow to the rear end side by the oil / water overflow prevention plate 23 is It is blocked and efficiently recovered by the recovery port 33 and the notch opening 35 of the screw conveyor 3.

  The oil water accommodated in the flange 25 is transferred by a recovery pump 27 through a recovery pipe 26 to an oil recovery tank (not shown).

  Such a spilled oil recovery device 1 can be mounted on a large ship, and can be mounted on a small ship because it can be made compact. For example, FIG. 5A shows a state in which one spilled oil recovery device 1 is attached to the front portion of the catamaran 100. The tip side of the spilled oil recovery device 1 is immersed below the surface of the water as described above, and the catamaran 100 is advanced toward the spilled oil WO, so that the oil water containing the spilled oil WO is made efficient by a plurality of screw conveyors 3. Can be recovered automatically. Of course, not only the catamaran, but one spilled oil recovery device 1 may be attached to the tip of a normal monohull. If it is a small ship, the recovery work can be performed uniformly over the whole of the spilled oil WO that has spread, and since it is easy to turn, it can be performed not only in the ocean but also in a narrow port. it can.

  Moreover, FIG.5 (b) has shown the mode of the ship 200 which attached the one spilled oil collection | recovery apparatus 1 to each both sides. In this case as well, the oil / water containing the spilled oil WO can be efficiently recovered in the same manner as described above, but the recovery operation can be performed over a wider range.

  FIG. 6 is a partial cross-sectional view showing another aspect of the recovery unit that recovers the oil and water discharged through the discharge port 34 and the opening 24.

  Here, the oil is solidified by injecting a cooling medium having a temperature at which the oil solidifies into the oil water collected by the screw conveyor 3.

  Any cooling medium can be used as long as the oil (heavy oil, etc.) in the recovered oil water can be solidified by cooling to a temperature at which the oil can be solidified. For example, cooled air or cooled oil can be used. A cooling gas such as nitrogen gas is preferably used. In the vicinity of each opening 24 of the water collecting plate 2, the cooling medium supply pipe 7 is disposed so as to extend over each opening 24, and an ejection portion 71 is provided toward each opening 24. . The cooling medium is supplied into the cooling medium supply pipe 7 from a cooling medium jetting device such as a compressor (not shown) and is jetted from each jetting portion 71 toward the oil water flowing down from the opening 24.

  A mesh conveyor 8 is arranged below the opening 24, and the solidified oil S solidified by the injection of the cooling medium falls and is placed on the mesh conveyor 8. Below the mesh conveyor 8, a separation tank 9 divided into a water tank 9a and an oil tank 9b is arranged. The solidified product S that has fallen on the mesh conveyor 8 is transported on the mesh conveyor 8, and the contained water w flows down from the mesh of the mesh conveyor 8 and falls into the water tank 9 a of the separation tank 9. The remaining oil s is captured and transported by the mesh conveyor 8 and is dropped and accommodated in the oil tank 9a of the separation tank 9 from the end side of the mesh conveyor 8.

  In the water tank 9a, an oil adsorbing mat 9c for contacting the water w falling from the mesh conveyor 8 and adsorbing the oil component still contained in the water w is provided. As a result, water w with little oil remaining in the water tank 9a is recovered. The recovered water w can be discharged into the sea as it is. The oil s recovered in the oil tank 9b is refined and reused in the ship or on land in a later process.

  By solidifying the recovered oil water with the cooling medium in this way, the recovery becomes easy and the oil and water can be easily separated.

  As shown in FIG. 7, the cooling medium may be connected to the casing 31 of each screw conveyor 3 and directly injected to the oil water in the casing 31. In this case, the solidified material S in which the oil and water is solidified is discharged from the discharge port 34 and the opening 24 and falls on the mesh conveyor 8.

  Further, as shown in FIG. 8, the cooling medium is sprayed from inside the mesh conveyor 8 to the oil and water falling from the opening 24 by arranging the perforated pipe 10 having a plurality of holes capable of spraying the cooling medium. You may make it make it.

  Although the separation tank 9 shown in FIG. 7 and FIG. 8 illustrated what integrated the water tank 9a and the oil tank 9b, these may be comprised separately.

  In the spilled oil recovery apparatus 1 according to the present invention, the water collecting plate 2 may be only a portion on the tip side of the oil / water overflow preventing plate 23. The portion on the rear end side from the oil / water overflow prevention plate 23 does not need to be formed in a full plate shape, and may be, for example, a mesh shape as long as it can support the lower portions of the plurality of screw conveyors 3. Alternatively, it is only necessary to bridge a steel plate such as an L-shaped angle over the entire screw conveyor 3. According to these, the water that has flowed onto the lower plate 21 on the rear end side of the oil / water overflow prevention plate 23 can be dropped and drained.

  Moreover, it can also be set as the aspect which does not provide the water collecting plate 2. FIG. In this case, the floating body 6 can be directly attached to the screw conveyor 3, and the plurality of screw conveyors 3 may be attached to the bracket 5 via the hinges 51 collectively.

  Although not shown, the spilled oil recovery apparatus 1 described above may be provided with a dust intrusion prevention means made of a wire net or the like for preventing the invasion of dust floating on the water surface at the tip side.

  Further, when the oil / water overflow prevention plate 23 is provided, a protective cover is provided on the upper surface of the water collecting plate 2 at the rear end side of the oil / water overflow prevention plate 23, and the screw conveyor 3 and the drive motor 4 inside. Etc. may be protected.

1: Spilled oil recovery device 2: Water collecting plate 21: Lower plate 21a: First flap plate 21b: Hinge 22: Side plate 22a: Second flap plate 22b: Hinge 23: Oil water overflow prevention plate 24: Opening 25: collar 26: collection pipe 27: collection pump 3: screw conveyor 31: casing 32: screw 33: collection port 34: discharge port 35: notch opening 36: bearing 4: drive motor 5: bracket 51: hinge 52: Mounting hole 53: Hanging metal fitting 53a: Hanging wire 6: Floating body 7: Cooling gas supply pipe 71: Jetting part 8: Mesh conveyor 9: Separation tank 9a: Water tank 9b: Oil tank 9c: Oil adsorption mat 10: Hole pipe 100 : Catamaran 200: Ship W: Water surface WO: Spilled oil S: Solidified material s: Oil w: Water

Claims (5)

A screw is rotatably accommodated along the axial direction inside a cylindrical casing having an oil recovery port at the front end in the axial direction and a discharge port for oil recovered at the rear end side. A screw conveyor for transferring from the recovery port to the discharge port by the rotational force of the screw ;
A spilled oil recovery apparatus comprising: a mesh conveyor that separates water and oil in a process of conveying the oil discharged from the discharge port .   The spilled oil recovery apparatus according to claim 1, further comprising a first flap plate for scooping the spilled oil toward the recovery port, the tip side being provided so that the angle can be adjusted in the vertical direction.   3. The spilled oil recovery device according to claim 1, further comprising a second flap plate that is provided such that a tip end side thereof is adjustable in a left-right direction and collects the spilled oil spreading on the water toward the recovery port. .   The spilled oil recovery device according to claim 1, 2 or 3, wherein a plurality of the screw conveyors are arranged in parallel.   A spilled oil recovery ship comprising the spilled oil recovery device according to any one of claims 1 to 4.

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