JP3428898B2 - Floating oil recovery system for ship bilge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating bilge oil recovery apparatus for separating and recovering oil and water from oil-containing bilge water accumulated on the bottom of a ship.

[0002]

2. Description of the Related Art At the bottom of a ship, clear seawater leaking from various devices and oil discharged from an engine or the like accumulate as bilge water. Since this bilge water is an oil-containing bilge containing a large amount of oil, discharging the bilge water outboard causes a problem of environmental pollution such as seawater. In other words, the need for oil separation and removal from oil-containing bilge water in ships has increased due to marine pollution control regulations and strengthening of port state control (PSC) inspection systems.
A lot of labor is spent on cleaning and other tasks.

[0003] It is effective to carry out oil / water separation as early as possible at the source, and it is generally difficult to treat the oil and water as it travels to the far end as it goes to the end.
Conventionally, the transfer and discharge of bilge water for ships have been carried out on the same line with one pump, so it is inevitable that oil will be mixed in the bilge tank, and this tendency will become more pronounced as the ship ages. .

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances.
The oil content of the floating oil floating in the oil-containing bilge water accumulated in the bilge pool or bilge tank in the ship can be collected and separated into oil and water, reducing the maintenance (cost reduction) of bilge waste oil treatment and the engine room. An object of the present invention is to provide a floating oil recovery device for a ship bilge that can beautify.

[0005]

According to the present invention, in order to achieve the above-mentioned object, a first aspect of the present invention is to provide an oil-containing bilge water from a bilge tank or a bilge pool in which oil and water bilges accumulated in a ship are separated by specific gravity. A suction pipe for sucking floating oil floating on the water surface, a recovery pump provided in the suction pipe, and a portable oil water installed in the vessel and communicating with the suction pipe for containing oil-containing bilge water An oil / water separation tank of the separator and a waste oil port provided at the lower end of the oil / water separation tank
Has, to overflow the upper layer of oil in the oil-containing bilge water to the upper end
A waste oil tank having an opening edge , provided inside the oil / water separation layer, having a drain port at a lower end, and having a drain port at an upper end;
A drainage tank having an opening edge at a higher position, a bottom end of the drainage tank penetrating through the bottom of the drainage tank, an inlet at the lower end opening to the inner bottom of the oil-water separation tank, and an opening edge of the waste oil tank inside the drainage tank at an upper end. Yo
It has a low opening to position the drain hole Ri, to oil-water separation by flooding water under layer of oil-containing bilge water supplied to the oil-water separation tank <br/> et sump or the drainage hole drainage A floating oil recovery device for a ship bilge, comprising: a pipe;

According to a second aspect of the present invention, a drain is provided at an upper end of the drain pipe.
It is characterized in that an adjusting pipe having a hole and capable of adjusting the height according to the height from the water surface to the oil surface is provided.

According to the first aspect, floating oil floating on the surface of oil-containing bilge water accumulated in a bilge tank or the like in a ship is suctioned by a bilge pump and stored in an oil / water separation tank, where it is separated into oil and water. The oil is stored in a waste oil tank, and the water returns to a bilge tank in the ship.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall configuration diagram of a floating oil recovery apparatus for a ship bilge, FIG. 2 is a vertical side view of an oil-water separator, and FIG. 3 is an enlarged vertical side view of a portion A in FIG. As shown in FIG.
A bilge reservoir or bilge tank 3 is provided on a part of the floor 2 of the bottom 1 of the ship, and the bilge reservoir or bilge tank 3 stores oil-containing bilge water 4.

The oil-containing bilge water 4 in the bilge pool or bilge tank 3 is provided with a recovering device 6 for recovering floating oil 5 floating on the water surface. The recovery device 6 includes a float 7 and a suction port 8 provided in the float 7, and one end of a suction pipe 9 is connected to the suction port 8.

A portable oil / water separator 10 is installed on the floor 2 located near the bilge reservoir or bilge tank 3. The oil / water separator 10 is equipped with a recovery pump 11 provided in the middle of the suction pipe 9. Further, the oil / water separator 10 is provided with an oil / water separation tank 12 as shown in FIG.

The oil / water separation tank 12 is a rectangular cylinder having an upper opening, the upper opening is closed by a lid 13, and a drain valve 14 is provided at the bottom. Further, an inlet 15 is provided on an upper side wall of the oil / water separation tank 12, and the other end of the suction pipe 9 is connected to the inlet 15. Further, a waste oil tank 16 and a drain tank 17 are installed adjacent to each other in an intermediate portion in the vertical direction inside the oil / water separation tank 12.

The waste oil tank 16 is provided with a waste oil port 18, and the waste oil port 18 is connected to a waste oil tank 20 (shown in FIG. 1) installed on the floor 2 via a waste oil pipe 19. The opening edge 17a of the drain tank 17 is higher than the opening edge 16a of the waste oil tank 16, and a drain port 21 is provided. The drain port 21 is connected to the bilge pool or the bilge tank 3 through a drain pipe 22. The separated water is returned.

Further, the drainage tank 17 is provided with a drainage pipe 23 extending vertically through the bottom thereof. The lower end inlet 23 a of the drainage pipe 23 is open near the inner bottom of the oil / water separation tank 12, and the upper end outlet 23 b is open near the inner bottom of the drainage tank 17. An internal thread 24 is formed on the inner peripheral surface of the upper end outlet 23b, and an external thread 26 of a cylindrical adjusting tube 25 is screwed to the internal thread 24.

As shown in FIG. 3, the adjusting tube 25 is provided with a plurality of drain holes 27 on a peripheral wall at a substantially middle portion in the height direction, and an operation knob 28 is provided on an upper end portion. By turning the adjusting tube 25 while holding the operation knob 28, the male screw portion 26 is fitted deeply into the female screw portion 24 or is fitted shallowly so that the height of the drain hole 27 changes. . That is, the oil-containing bilge water 4 accommodated in the oil-water separation tank 12 is separated into water 4a and oil 4b, the water 4a having a higher specific gravity is located at a lower position, and the oil 4b having a lower specific gravity is located at an upper position. A difference h (−5 to +30 mm) is formed between the oil level and the oil level, and the height position of the drain hole 27 can be adjusted by the difference h.

Next, the operation of the above embodiment will be described.

When the recovery pump 11 is driven, the floating oil 5 floating in the oil-containing bilge water 4 in the bilge pool or the bilge tank 3 is sucked from the suction port 8 of the recovery unit 6, but at the same time, the oil-containing bilge water 4 Is also sucked and led to the water inlet 15 through the suction line 9. Then, the oil-containing bilge water 4 is injected into the oil-water separation tank 12 from the water inlet 15. The oil-containing bilge water 4 in the oil-water separation tank 12 is supplied to the inlet 15
The water 4a is separated into a lower layer and the oil 4b is separated into an upper layer due to a difference in specific gravity by being made to collide with a baffle plate 29 in the oil / water separation tank 12 from the water.

When the oil-containing bilge water 4 is injected from the water inlet 15, the water 4a separated by the baffle plate 29 enters the drain pipe 23 through the lower end inlet 23a of the drain pipe 23 and rises. The water level and oil level in the tank 12 gradually rise. Therefore, the upper layer oil 4 b overflows the opening edge 16 a of the waste oil tank 16 and flows into the waste oil tank 16, and flows into the waste oil tank 20 from the waste oil port 18 through the waste oil pipe 19 in a head type manner.

Also, the water 4a in the drain pipe 23
The water overflows from the drain tank 17 and flows into the
Is returned to the bilge pool or bilge tank 3 through the drain pipe 22. The oil-containing bilge water 4 thus injected into the oil-water separation tank 12 is separated into water 4a and oil 4b,
The oil 4b is stored in the waste oil tank 20, and only the water 4a is returned to the bilge pool or the bilge tank 3, so that the amount of the floating oil 5 in the bilge pool or the bilge tank 3 can be gradually reduced.

When the proportion of the oil component in the oil-containing bilge water 4 in the oil-water separation tank 12 is large or when there is a lot of foaming, the difference h between the water surface and the oil surface becomes large. The height h of the drain hole 27 can be increased by opening the body 13 and turning the operation knob 28 to reduce the screwing amount of the adjusting tube 25.

Further, the oil-water separator 10 is portable, and can be moved and installed at an arbitrary position, so that it does not become an obstacle when not in use.

[0022]

As described above, according to the present invention, it is possible to recover the oil content of the floating oil floating in the oil-containing bilge water collected in the bilge pool or the bilge tank at the bottom of the ship and separate the oil and water. Maintenance of bilge waste oil treatment can be reduced (cost reduction) and the engine room can be beautified. In addition, since the oil-water separator is portable, it can be installed at an arbitrary position.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a floating oil recovery device for a ship bilge showing an embodiment of the present invention.

FIG. 2 is a vertical side view of the oil-water separator of the embodiment.

FIG. 3 is a longitudinal sectional side view showing part A of FIG. 2 in an enlarged manner.

[Explanation of symbols]

3 ... Bilge tank 9 ... Suction line 10. Oil / water separator 11… Recovery tank 12 ... Oil / water separation tank 16. Waste oil tank 17… Drainage tank 23 ... Drain pipe

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B63J 4/00 B63B 13/00

Claims (2)

(57) [Claims] 1. A suction pipe for sucking floating oil floating on the surface of oil-containing bilge water from a bilge tank or a bilge pool in which oil-water bilges accumulated in a ship are separated from each other by a specific gravity difference, and provided on the suction pipe. A recovery pump, an oil / water separation tank of a portable oil / water separator that is installed in the vessel and communicates with the suction pipe line and accommodates oil-containing bilge water ; and a waste oil port provided at the lower end of the oil / water separation tank. Has ,
Opening edge at the top to allow oil in the upper layer of oil-containing bilge water to overflow
A waste oil tank having a , provided inside the oil-water separation layer , having a drain port at the lower end ,
The upper end has an opening edge higher than the opening edge of the waste oil tank
A sump that, through the bottom of the sump, open to the inner bottom lower inlet of the oil-water separation tank, inside the sump to the upper end, the waste
Has drainage holes opening at a position lower than the opening edge of the oil tank, the waste water pipe for oil-water separation by flooding the drain tank the water beneath layers of oil-containing bilge water supplied to the oil-water separation vessel from said drain hole A floating oil recovery device for a ship bilge, comprising: 2. A drain hole is provided at an upper end of the drain pipe.
2. The floating oil recovery device for marine bilges according to claim 1, further comprising an adjusting pipe whose height can be adjusted according to the height from the water surface to the oil surface.