JP2008025309A - Towed on-board oil collecting float type oil content concentrating and recovering apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a towed on-board oil collecting float type oil content concentrating and recovering apparatus capable of improving an oil recovery percentage without laying any oil fence. <P>SOLUTION: An oil recovering apparatus 10 comprises an oil and water separating chamber 11 having a circular drum 13 with a plurality of oil and water flow inlets 12 arranged in a circumferential direction at regular intervals, a forced water draining device 30 equipped with a water drain pipe 31 leading to the oil and water separating chamber 11, an oil sucking hole 42 opened near the top of the oil and water separating chamber 11 with an oil suction pipe 42 extended to the outside of the oil and water separating chamber 11. An oil collecting float 45 almost has an U-shape as a whole and an oil and water inflow sluice 57 opened forward, and then it forms an oil and water inlet 58 connected to an oil and water flow inlet 12 succeeding the oil and water inflow sluice 57. The oil collecting float 45 functions to hold the oil recovering apparatus 10 and also to collect the oil. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an oil recovery apparatus, and more particularly to a towed oil collecting float mounted oil concentration type oil recovery apparatus that tows the oil recovery apparatus by ship in the sea, lakes, rivers, etc., and separates and recovers the oil from the oil water.

A conventional oil recovery apparatus collects oil with an oil fence in order to increase oil recovery efficiency, and recovers oil by increasing the concentration of oil (see, for example, Patent Document 1). For this reason, it is necessary to lay an oil fence in advance in the oil recovery place, and much cost and time are required for transporting and laying the oil fence. There is also a problem that the oil recovery rate is lowered due to the oil escaping from the lower part of the oil fence.
JP 2002-274486 A (paragraph [0021])

  The present invention solves the above-described problem, and provides a tow-collecting float-mounted oil content concentration type oil recovery device that does not require an oil fence and can improve the oil recovery rate. It is an issue.

  The towed oil collection float-equipped oil concentration type oil recovery device of the present invention includes an oil recovery machine that separates and recovers oil from oil water, and a towed oil collection float-mounted oil part that includes an oil collection float that holds the oil recovery machine Concentrated oil recovery apparatus, wherein the oil recovery machine includes a cylindrical oil-water separation chamber having a plurality of oil-water inlets provided at intervals in the circumferential direction, and a drain pipe communicating with the oil-water separation chamber A forced drainage device, an oil suction port that opens near the top of the oil-water separation chamber, and an oil-absorbing pipe that extends to the outside of the oil-water separation chamber; the oil collection float is generally U-shaped as a whole; And an oil / water inlet path that leads to the oil / water inlet is formed between the oil / water inlet and the oil / water separation chamber.

  In the oil recovery apparatus of the present invention, the oil collection float has both the holding of the oil recovery machine and the oil collection function. Accordingly, since it is not necessary to install an oil fence, the oil recovery work time is shortened and the recovery work itself is simplified. Moreover, since oil water is taken in with the oil collection float and led to the oil water separation chamber of the oil recovery machine held in the oil collection float, the oil recovery rate can be increased. For example, the oil recovery rate of the oil recovery device using a conventional oil fence was 20%, but the oil recovery device of the present invention improved to 40%.

  1 to 4 show an embodiment of the present invention, and FIG. 1 schematically shows a main part of a towed oil collecting float-equipped oil concentration type oil recovery device (hereinafter referred to as “oil recovery device”). It is a perspective view shown in FIG. FIG. 2 is a plan view of the apparatus shown in FIG. 3 is a longitudinal sectional view of the entire apparatus including the main part shown in FIG. 1, and FIG. 4 is a plan view thereof. In this embodiment, the tow ship equipped with the oil recovery device is a catamaran.

  The oil recovery apparatus 1 mainly includes an oil recovery machine 10, an oil collection float 45, and an oil recovery machine holding device 70.

  The oil recovery machine 10 is provided with an oil / water separation chamber 11, and the oil / water separation chamber 11 has a lid 14 attached to the upper end of the cylindrical body 13. The upper portion of the cylindrical portion 13 and the inside of the lid 14 form an oil sump 16. The cylinder portion 13 is provided with oil / water inflow ports 12 at three locations spaced 120 ° in the circumferential direction toward the lower end. As shown in FIG. 3, during oil recovery, the oil / water inlet 12 is under water and becomes a diving weir. An annular separation chamber bottom plate 18 is attached to the lower end of the cylindrical portion 13.

  A cylindrical inner cylinder 20 penetrating the separation chamber bottom plate 18 is provided concentrically with the cylinder 13 of the oil / water separation chamber 11. An annular channel 21 is formed between the inner peripheral surface of the cylindrical portion 13 and the outer peripheral surface of the inner cylinder 20, and a drainage channel 22 is formed inside the inner cylinder 20.

  A bellows 24 is fixed to the separation chamber bottom plate 18 concentrically with the cylinder portion 13 and outside the cylinder portion 13. The separation chamber bottom plate 18 closes the space between the outer peripheral surface of the inner cylinder 20 and the bellows 24. An annular inflow weir 25 is attached to the top of the bellows 24. An oil / water inflow chamber 26 is formed between the cylindrical portion 13, the bellows 24, and the inflow weir 25.

  A water guide float 27 is attached to the inflow weir 25. The water guide float 27 has an annular main body 28, and includes three projecting portions 29 a, 29 b, and 29 c that protrude upward from the upper surface of the annular main body 28 and are spaced apart in the circumferential direction. The center of the 1st protrusion part 29a exists on the centerline of the oil-water inflow path 57 of the oil collection float 45, and the 2nd protrusion part 29b and the 3rd protrusion part 29c are the intervals of 120 degree | times to the left and right of the circumferential direction from the 1st protrusion part 29a. Is placed. The upper end of the protruding portion 29 is higher than the upper end of the inflow weir 25, and oil water flows into the oil water inflow chamber 26 from between the adjacent protruding portions 29.

  A water guide plate 85 is fixed to the gantry 80 adjacent to the tip of the first protrusion 29a. The water guide plate 85 is configured by combining two plates so as to narrow toward the inlet of the oil water inflow passage 57. The water guide plate 85 rectifies the oil / water flow that has flowed into the oil / water inflow passage 57 and makes it easier for oil to flow into the oil / water inlet 12 of the oil / water separation chamber 11.

  In the forced drain device 30, a drain pipe 31 is fixed to the lower surface of an annular inner cylinder bottom plate 23 provided at the bottom of the inner cylinder 20, and a motor mount 33 is fixed to the upper surface. A drain blade driving motor 34 is attached to the motor mount 33. A drain blade axis 37 is connected to an output shaft 35 of the drain blade driving motor 34. The tip of the drainage blade shaft 37 extends to the outlet of the drainage pipe 31 and is supported by the support member 32. A drainage blade 38 is attached near the lower end of the drainage blade shaft 37.

  An oil absorption pipe 41 is attached to the oil / water separation chamber 11. The oil absorption pipe 41 extends from near the top of the oil / water separation chamber 11 through the oil / water separation chamber 11 to the outside of the oil / water separation chamber 11. The upper end of the oil absorption pipe 41 is opened near the top of the oil / water separation chamber 11, forming a funnel-shaped oil absorption opening 42. The outlet of the oil absorption pipe 41 is connected to an oil absorption pump (both not shown) on the towed ship via an oil transfer pipe.

  An intake pipe 43 is attached to the top of the lid 14. An air suction pump or an ejector (not shown) is attached to the intake pipe 43.

  The oil collection float 45 includes a float body 46 and a float holding frame 60. The float main body 46 includes left and right float side portions 47a and 47b and a semicircular arc-shaped float rear portion 54, and is substantially U-shaped as a whole. An oil / water outflow prevention plate 51 extends forward from the front ends of the front surfaces 50 of the left and right float side portions 47a and 47b, and the float front surface 50 and the oil / water outflow prevention plate 51 form an oil / water inflow passage 57. The oil / water inflow passage 57 narrows from the float inlet toward the back. The portion following the rear of the oil / water inflow passage 57 is an oil / water introduction passage 58 formed by the oil / water separation chamber 11, the left and right float side portions 47 a and 47 b, and the float rear portion 54. In the oil / water introduction path 58, the interval between the left and right float side portions 47a and 47b is widened toward the rear. Accordingly, the left and right float side portions 47a and 47b each have a V-shape projecting inward at the boundary between the oil-water inflow passage and the oil-water introduction passage and in the vicinity thereof. Portions 49a and 49b are formed. By providing the throttle portions 49a and 49b, oil collection efficiency and oil recovery efficiency can be increased by suppressing undulations inside the oil collection float.

  The oil collection float 45 can improve cruising resistance and followability to waves by increasing the line area / total weight ratio.

  The float body 46 is attached to the float holding frame 60. As shown in FIGS. 3 and 4, the float holding frame 60 has vertical frames 61 </ b> F and 61 </ b> R arranged at the front part and the rear part, respectively. Each vertical frame 61F, 61R is composed of upper and lower horizontal members 62U, 62L and front and rear vertical members 63F, 63R. The front vertical member 63F passes through the longitudinal grooves 48 of the left and right float side portions 47a and 47b, respectively. As shown in FIG. 4, a U-shaped guide fitting 65 is fixed to both ends of each horizontal member 62U, 62L. A shoe 66 is attached to the inner surface of the guide fitting 65.

  An overtopping prevention wall 86 projecting upward from the upper surface of the float body 46 and a skirt 87 projecting downward from the lower surface are respectively attached along the inner periphery of the float rear portion 54. The overtopping prevention wall 86 prevents oil and water from flowing over the oil collection float 45 due to high waves. The skirt 87 is made of a flexible material, such as a vinyl sheet, and prevents oil water flowing out from below the oil collection float 45. As a result, the oil accumulated in the oil collection float 45 can be held for a long time, and the oil collection effect is improved.

  The oil recovery machine holding device 70 includes an oil recovery machine lifting frame 71. The oil recovery machine elevating frame 71 is configured by connecting four corners of upper and lower horizontal frames 72U and 72L formed of a vertical member 73 and a horizontal member 74 with a vertical member 75. An oil recovery machine slide rail 76 is fixed along the vertical members 75 of the upper and lower horizontal frames 72U and 72L. A guide fitting 78 is fixed near the upper end of each vertical member 75. A shoe 79 is provided on the inner surface of the guide fitting 78.

  The oil collection float 45 moves up and down with respect to the oil recovery machine elevating frame 71 according to a change in the water level or the amount of oil in the oil / water separation chamber 11. At this time, the shoe 66 of the guide fitting 65 of the float holding frame 60 slides on the surface of the oil recovery machine slide rail 76, and the oil collection float 45 moves up and down.

  The gantry 80 is attached to the lower front and rear horizontal members 62L. The gantry 80 supports the oil recovery machine 10 in the oil collection float 45. In a state where the oil recovery machine 10 is supported, an oil / water introduction path 58 is formed between the outer peripheral surface of the oil / water separation chamber 11 and the inner peripheral surface of the oil collection float 45. In the oil recovery machine 10, the center Os of the oil / water separation chamber 11 is positioned slightly rearward from the semicircular arc center Of of the float rear portion 54 as shown in FIG. 2. As a result, a large amount of oil water that has entered the oil-water introduction path 58 can flow between the oil-water separation chamber 11 and the float rear portion 54.

  An oil recovery machine lifting rail 83 extending in the vertical direction is provided on the side 4 of the towed ship 3. The oil recovery machine lifting rail 83 is U-shaped, and a stopper 84 is fixed to the lower end. The shoe 79 of the guide fitting 78 provided on the vertical member 75 of the oil recovery machine elevating frame 71 slides and is guided along the U-shaped inner surface of the oil recovery machine elevating rail 83, and the oil recovery machine elevating frame 71 moves up and down.

  The operation of the oil recovery apparatus configured as described above will be described. The oil recovery apparatus 1 is transported to an oil recovery place where the oil floats by the tow ship 3, and the wire 82 connected to the upper end of the vertical member 75 of the oil recovery machine lifting frame 71 is rewound and lowered to the water surface.

  In the state where the oil recovery apparatus 1 is lowered to the water surface, the upper part in the oil / water separation chamber 11 is filled with air, the water guide float 28 floats, and the bellows 24 extends. Here, an air suction pump (not shown) is driven to suck the air in the oil / water separation chamber 11, and the air in the oil / water separation chamber 11 is removed from the intake pipe 43. As a result, the water level in the oil / water separation chamber 11 rises, the oil / water separation chamber 11 sinks, the water guide float 28 rises, and the bellows 24 further extends. Next, the drain blade driving motor 34 is driven to discharge the water in the oil / water separation chamber 11. This drainage lowers the water level of the oil / water inflow chamber 26, lowers the water guide float 27, and simultaneously lowers the inflow weir 25, so that the oil flows into the oil / water inflow chamber 26 beyond the inflow weir 25. The oil water flows from the oil / water inflow chamber 26 into the oil / water separation chamber 11 through the oil / water inlet 12.

  With the oil water flowing into the oil / water separation chamber 11, the oil recovery apparatus 1 is towed in the oil recovery place by a tow ship. By the towing of the oil recovery apparatus 1, the oil enters the oil / water introduction path 58 from the oil / water inflow path 57 of the oil collection float 45. A part of the oil water flows into the oil / water separation chamber 11 from the oil / water inlets 12 on both the left and right sides, and the remaining oil water flows into the rear part of the oil collection float 45 and flows into the oil / water separation chamber 11 from the rear oil / water inlet 12. .

  The oil water flowing into the oil / water separation chamber 11 from the oil / water inlet 12 is separated from the water due to the difference in specific gravity while flowing through the drain passage 22 from the annular passage 21 over the inner cylinder 20. The separated oil floats in the oil / water separation chamber 11, gathers in the upper portion of the oil / water separation chamber 11 and the lid 14, and is discharged from the oil absorption pipe 41. Water is discharged from the inner cylinder 20 through the drain pipe 31 by the forced drain device 30.

  The present invention is not limited to the above embodiment. The bellows 24 may be a peripheral wall that prevents direct inflow of oil into the oil inflow chamber 26. In this case, the inflow weir 25 and the water guide float 27 move up and down integrally with the oil / water separation chamber 11. Further, the inner cylinder 20 may be omitted. In this case, the forced drainage device 30 is attached to the separation chamber bottom plate 18. The shape of the horizontal cross section of the oil collection float 45 is not limited to that shown in FIG. 1 or FIG. For example, it may be a V type (see FIG. 5a), a polygon type (see FIG. 5b), or a J type (see FIG. 5c). In the case of the J type, the oil recovery apparatus 1 is attached to one side of the tow ship. The number of protrusions 29 of the water guide float 27 is not limited to three, and may be two or four or more depending on the size of the apparatus. The throttle 49 (see FIG. 5b), the water guide plate 85, the overtopping prevention wall 86 or the skirt 87 may be omitted. Further, as indicated by an imaginary line in FIG. 2, a trim adjustment float 88 may be provided in the oil / water inflow passage 57 in front of the oil recovery machine main body 10. The trim adjustment float 88 is attached to an arm (not shown) extending from the gantry 80 so that the vertical position can be adjusted. The vertical position of the trim adjustment float 88 is adjusted to adjust the front / rear inclination of the oil collection float 45. Further, the oil recovery device 1 may be towed by the towline by connecting the rear end part of the towline (not shown) fed from the towed ship to the front end parts of the left and right float side parts 47a and 47b.

1 is a schematic perspective view of a main part of an oil recovery apparatus according to an embodiment of the present invention. It is a top view of the oil recovery apparatus principal part shown in FIG. 1 shows a form of the present invention, and is a longitudinal section of an oil recovery apparatus having a main part shown in FIG. It is a top view of the oil collection | recovery apparatus shown in FIG. It is a top view which shows typically the other aspect of an oil collection float.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Oil recovery device 3 Towing ship 10 Oil recovery machine 11 Oil-water separation chamber 12 Oil-water inlet 13 Circle body 14 Lid 16 Oil sump 18 Separation chamber bottom plate 20 Inner cylinder 21 Annular channel 22 Drain channel 23 Inner cylinder bottom plate 24 Bellows 25 Inflow weir 26 Oil water inflow chamber 27 Water guide float 29 Projection portion of water guide float 30 Forced drainage device 31 Drain pipe 34 Drain blade driving motor 38 Drain blade 41 Oil absorption pipe 42 Oil inlet 45 Oil collection float 46 Float main body 47 Oil collection float side section 49 Restriction part 54 Oil collection float rear part 57 Oil water inflow path 58 Oil water introduction path 60 Float holding frame 61 Vertical frame 65 Guide metal fitting 66 Shoe 70 Oil recovery machine holding device 71 Oil recovery machine lifting frame 72 Horizontal frame 75 Vertical member 76 Oil recovery machine slide Moving rail 78 Guide bracket 79 Shoe 80 Base 82 Wire 83 Oil recovery machine lifting rail 85 Guide Water plate 86 Overtopping prevention wall 87 Skirt 88 Trim adjustment float

Claims (5)

An oil collecting machine that separates and collects oil from oil water, and a towed oil collecting float mounted oil concentration type oil collecting apparatus that includes an oil collecting float that holds the oil collecting machine,
The oil recovery machine includes an oil / water separation chamber having a circular cylinder portion in which a plurality of oil / water inlets are provided at intervals in the circumferential direction, a forced drainage device having a drain pipe communicating with the oil / water separation chamber, and the oil / water separation An oil absorption opening that opens near the top of the chamber, and an oil absorption pipe that extends to the outside of the oil / water separation chamber,
The oil collection float has a substantially U-shape as a whole, has an oil / water inflow passage that opens forward, and communicates with the oil / water inlet between the oil / water separation chamber and the oil / water separation chamber. An oil concentrating oil recovery device equipped with a towing oil collection float, characterized by forming an introduction path. A front part of the oil collecting float is composed of a pair of opposed float side parts, and a boundary part between the oil water inflow path and the oil water introduction path and its vicinity project inwardly to form a throttle part. The towed oil collecting float mounted oil concentration type oil recovery device according to claim 1. The oil recovery machine is concentric with the oil / water separation chamber, provided on the outside of the oil / water separation chamber, and attached to the bellows, and an annular inflow weir that can be moved up and down relative to the oil / water separation chamber; An oil / water inflow chamber formed between the oil / water separation chamber and the bellows and the inflow weir; and a plurality of protrusions protruding upward from the upper surface of the annular body and spaced apart in the circumferential direction; The towed oil collecting float-mounted oil concentration type oil recovery device according to claim 1 or 2, further comprising an introduction float attached to the tow. The oil recovery machine has an inner cylinder provided concentrically therewith in the oil / water separation chamber, and an annular flow path is formed between the outer circumferential surface of the oil / water separation chamber and the outer circumferential surface of the inner cylinder, The oil-concentrating oil recovery device with a towing oil collection float mounted type according to claim 1, which becomes a drainage channel leading to the water distribution pipe. 5. The oil recovery apparatus according to claim 1, further comprising an oil recovery machine elevating frame attached to an oil recovery apparatus towing ship, wherein the oil collection float is attached to the oil recovery machine elevating frame so as to be elevable. Oil-concentrating oil recovery device with towing oil collection float.

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