JPS5920810B2 - Spilled oil recovery equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for recovering oil spilled onto the water surface.

There is a conventional spilled oil recovery device as shown in Figure 1, in which a floating body 3 is fixed to a box-shaped oil recovery head 2 with a weir 1 on the front wall. The head 2 is attached to an oil recovery vessel 6 via suspension devices 4 and 5 so that it can move vertically together with the floating body 3.

Further, the oil/water suction lower of the oil recovery head 2 is connected to an oil pump (not shown) in the oil recovery vessel 6 via a flexible tube 8.

In this way, the oil recovery head 2 is floated on the water surface by the floating body 3, so even if there are some waves, the oil recovery head 2
The weir 1 always maintains an appropriate position with respect to the water surface, and when the oil recovery vessel 6 travels forward (to the right in Figure 1) in this state, the oil recovery head 2 follows the waves with the floating body 3 and the suspension system 4
, 5, the oil floating on the water surface crosses the weir 1 and flows into the oil recovery head 2, and then the oil passes from the oil/water suction lower through the flexible pipe 8 to the oil recovery vessel. It is designed to be sucked into the oil pump in 6 and collected.

However, in this type of conventional oil spill recovery device, the oil recovery head 2 follows the waves by the floating body 3, and the weir 1 on the front wall of the oil recovery head 2 always maintains an appropriate positional relationship with the water surface. However, it is impossible to allow only the oil on the water surface to flow in, and there is a problem that a large amount of water flows into the oil recovery head 2 together with the oil, especially when the waves are high.

In addition, the oil recovery head 2 needs to be lightweight in order to improve its ability to follow waves. For example, if the oil recovery head 2 has a sufficient volume to separate oil and water, the weight will increase, making it difficult to follow waves. There is a problem in that the followability deteriorates and a large amount of water flows into the oil recovery head 2, which causes the water that has flowed in with the oil to be sucked and collected together, resulting in a significant drop in oil recovery performance.

The present invention aims to solve these problems.
The oil recovery performance can be greatly improved by separating the water that has flowed in with the oil over the weir from the oil without compromising the ability of the oil recovery head to follow waves, and by efficiently recovering highly concentrated oil. The purpose of the present invention is to provide a spilled oil recovery device.

Therefore, the spilled oil recovery device of the present invention includes an oil-water separation tank formed with an oil-water suction port that communicates with an oil recovery head, and an oil-water separation tank that has one end opened at the top of the oil-water separation tank and is disposed outside the oil-water separation tank. an air bleed pipe whose other end communicates with the suction port of the eductor, which is connected to the air bleed pipe in the oil-water separation tank, and a float valve that opens and closes in conjunction with a liquid level gauge in the oil-water separation tank; a first oil-water interface meter for detecting the upper limit of the oil-water interface in the oil-water separation tank;
an oil extraction pipe having an oil suction port that opens into the oil-water separation tank and an oil extraction control valve that opens and closes in conjunction with the first oil-water interface meter; and an oil-water interface in the oil-water separation tank. a second oil-water interface meter for detecting a lower limit; and a drainage control valve that opens and closes in conjunction with the second oil-water interface meter to discharge excess water in the oil-water separation tank via the eductor. and an excess water discharge part communicating from the bottom of the oil/water separation tank to the suction port of the eductor.

Hereinafter, a spilled oil recovery apparatus as an embodiment of the present invention will be explained with reference to the drawings. FIG. This oil/water separation tank 1
An oil/water suction port 12a is formed in the lower part of the side wall of 2 and is connected to the box-shaped oil recovery head 2 via a flexible tube 8.

A floating body 3 is fixed to the oil recovery head 2, and a weir 1 is formed on the front wall of the oil recovery head 2. This allows oily water near the sea surface to flow inside the oil recovery head 2. After flowing into the oil/water suction lower, the flexible pipe 8 and the oil/water suction port 12a of the oil/water separation tank 12 are introduced into the oil/water separation tank 12.

The oil recovery head 2 is attached to the oil recovery vessel 1 via suspension devices 4 and 5 so that it can move vertically integrally with the floating body 3.
It is attached to 1.

By the way, the lower end of the oil/water separation tank 12 is connected to the bottom plate 1.
2b and whose upper end is arranged at an appropriate distance from the ceiling plate 12c,
and a rear chamber 12e.

Further, in the lower part of the rear chamber 12e of the oil-water separation tank 12, a plurality of inclined plates 14 are arranged at appropriate intervals from the bottom plate 12b and from each other at appropriate intervals.

Further, an oil suction pipe 15 as an oil extraction pipe having an oil suction port 15a at one end is inserted into the upper part of the oil/water separation tank 12 to an appropriate position, and the other end is connected to an oil extraction control valve 16 for oil recovery. It is connected to an inlet of an oil pump (not shown) inside the ship 11.

An eductor 17 is provided below outside the oil-water separation tank 12, and one end of a drive water pipe 19 is connected to a nozzle 18Vc of this eductor 17. Not connected to the outlet of the eductor-driven pump.

The suction port 17a of the eductor 17 opens at the lower part of the rear chamber 12e of the oil-water separation tank 12, and a drainage control valve 21 is provided in the opening 20 serving as the surplus water discharge section.

Note that the discharge port 17b of the eductor 17 is connected to the oil/water separation tank 12.
It opens towards the outside rear.

Further, the suction port 17a of the eductor 17 is provided with a proximal end of a branch pipe 22 as an air extraction pipe, and the tip of the branch pipe 22 rises toward the upper part of the oil/water separation tank 12 and floats. Via the valve 23, the oil/water separation tank 1
It opens at the top of 2.

The float valve 23 is equipped with a float 23a that can be moved with its lower limit being an appropriate dimension above the oil suction port 15a and its upper limit being an appropriate dimension below the upper opening of the branch pipe 22. It is connected so that it is fully closed and fully open at its lower limit.

Furthermore, first and second oil-water interface gauges 24 and 25 are attached to the ceiling plate 12c of the oil-water separation tank 12.
The first oil-water interface gauge 24 is inserted an appropriate dimension below the oil suction port 15a, and the second oil-water interface gauge 25
is inserted up to an appropriate distance above the upper end of the inclined plate 14.

The first oil-water interface gauge 24 is connected to the oil-extracting control valve 16 so that it opens the oil extraction control valve 16 when oil comes to its tip and closes it when water arrives, and the second oil-water interface gauge 2
5 opens the drainage control valve 21 when water reaches its tip;
It is connected to this drainage control valve 21 so that it closes when oil comes.

In addition, each valve 16, 21, 23 is an oil-water interface meter 2.
4.25 and flow) 23a, it can be opened and closed automatically, and it can also be opened and closed manually.

Since the spilled oil recovery device of the present invention is configured as described above, in order to recover spilled oil, first, manually close the drain control valve 21 and open the float valve 23 in a place where there is no oil on the water surface. Then, when the eductor drive pump (not shown) in the oil recovery vessel 11 is driven, high-pressure water is sent through the drive water pipe 19, jet water is spouted from the nozzle 18 of the eductor 17, and the branch pipe 22 Since the air in the oil/water separation tank 12 is sucked in from the oil/water separation tank 12, this air is discharged to the outside from the discharge port 17b of the eductor 17.

As a result, the inside of the oil-water separation tank 12 becomes vacuum, so that water flowing into the oil recovery head 2 passes through the oil-water suction lower, the flexible pipe 8 and the oil-water suction port 12a, and then enters the oil-water separation tank 12.
It is drawn inward and fills its interior.

Thereafter, the oil extraction control valve 16, the drainage control valve 21, and the float valve 23 are linked with the eleventh and second oil-water interface gauges 24, 25 and the float 23a, and the oil recovery ship 11
When the oil pump inside is driven and the oil recovery vessel 11 is moved forward (rightward in FIG. 2) at a place where there is floating oil, the oil water that has flowed into the oil recovery head 2 flows into the oil-water separation tank 12 as described above. The oil is sucked into the oil and separated into upper layer oil and lower layer water due to the difference in specific gravity.

For example, when the oil level is low and the water level is above the tip of the first oil-water interface meter 24, the oil extraction control valve 16 is closed and the drainage control valve 21 is open, so that no oil is removed from the oil suction port 15a. No suction is performed, and only drainage from the eductor suction port 17a is performed.

When only water is drained from the suction port 17a of the eductor 17, the oil-water interface is lowered, and the first oil-water interface meter 2
When this oil-water interface reaches the lower end of the oil-water interface 4, the oil extraction control valve 16 opens, so that oil is sucked through the oil suction port 15a and collected into the oil recovery vessel 11.

When the oil-water interface further lowers and reaches the tip of the second oil-water interface meter 25, the drainage control valve 21 closes, so drainage from the lower part of the oil-water separation tank 12 is stopped and oil is prevented from being discharged. Ru.

When the drainage control valve 21 is closed in this manner, the oil-water interface rises again, and when water reaches the tip of the second oil-water interface gauge 25, the drainage control valve 21 opens again to resume drainage.

However, when the oil-water interface rises further and water reaches the tip of the first oil-water interface meter 24, the oil extraction control valve 16 closes, thereby preventing water from being sucked from the oil suction pipe 15. .

By the way, when air is sucked from the oil/water suction port I of the oil recovery head 2, it passes through the flexible tube 8 and the oil/water suction port 12a,
Air is drawn into the oil-water separation tank 12, and this air accumulates in the upper part of the oil-water separation tank 12.

When the oil level drops as a result, the float 23a lowers and opens the float valve 23, so that air is sucked into the eductor 17 through the branch pipe 22 and discharged to the outside from its discharge port 17b.

In this way, when the air is exhausted and the oil level rises again,
Since the float 23a rises and closes the float valve 23, oil is prevented from overflowing through the branch pipe 22.

According to the spilled oil recovery device of the present invention, the level of the oil-water interface moves up and down between the tips of the first and second oil-water interface gauges 24, 25, and the oil surface is at the upper limit of the flow 23a. Since it moves up and down between the lower limit, the oil suction port 15a is always held in oil, but each oil-water interface meter 2
4 and 25 and the upper and lower limit positions of the flow) 23a are appropriately determined as described above, so that oil is sucked from the eductor suction port 17a and the branch pipe 22 and discharged to the outside of the oil-water separation tank 12. Moreover, only oil is suctioned and collected without suctioning water or air from the oil suction port 15a.

As described above in detail, the spilled oil recovery apparatus of the present invention provides the following effects and advantages.

(1) Conventionally, as shown in Figure 1, the flexible tube that was connected from the oil recovery head to the ship's hull is simply connected to the oil-water separation tank fixed to the ship's hull in the present invention, so that the oil recovery head is not connected to the waves. This does not impair the followability at all.

(2) The oil/water separation tank has a sealed tank structure,
Since a vacuum is created by the operation of the oil pump or eductor, the suction of oil and water flowing into the oil recovery head is good.

(3) Oil recovery head The water that flows in with the oil is separated from the oil in the oil-water separation tank and then discharged to the outside by the eductor, so highly concentrated oil is efficiently recovered, which greatly improves oil recovery performance. improves.

(4) Even if air is sucked from the oil-water suction port of the oil recovery head, it is separated in the oil-water separation tank and then discharged by the eductor, so air is sucked into the oil pump and the oil suction work is no longer possible. This can prevent it from stopping.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of a conventional spilled oil recovery device;
The figure is a longitudinal sectional view of a spilled oil recovery device as an embodiment of the present invention. 1... Weir, 2... Oil recovery head, 3.
...Floating body, 4.5...Suspension device, 7...
...Oil/water suction port, 8...Flexible tube, 11...
...Oil recovery ship, 12...Oil water separation tank,
12a... Oil/water suction port, 12b... Bottom plate, 12c... Ceiling plate, 12d... Front chamber of oil/water separation tank 12, 12e... ...Rear chamber of oil/water separation tank 12, 13...Partition plate, 14...
... Inclined plate, 15 ... Oil suction pipe as oil extraction pipe, 15a ... Oil suction port, 16 ...
・Oil extraction control valve, 17... Eductor, 17a
...Suction port of eductor 11, 1Tb...
・Discharge port of eductor 17, 18...Nozzle, 1
9... Drive water pipe, 20... Opening as surplus water discharge section, 21... Control valve for drainage, 2
2...Branch pipe as air bleed pipe, 23...
・Float valve, 23a... Float, 24...
...First oil-water interface meter, 25...Second oil-water interface meter.

Claims (1)

[Claims] 1. An oil-water separation tank formed with an oil-water suction port that communicates with the oil recovery head, and one end of which is opened at the top of the oil-water separation tank, and the other end of which is communicated with the suction port of an eductor disposed outside the oil-water separation tank. Detecting the upper limit of the oil-water boundary surface in the oil-water separation tank; an oil extraction pipe having an oil suction port opening into the oil-water separation tank and an oil extraction control valve that opens and closes in conjunction with the first oil-water interface meter; , the 20th for detecting the lower limit of the oil-water interface in the oil-water separation tank.
The oil-water interface meter is provided with a drainage pedestal valve that opens and closes in conjunction with the second oil-water interface meter in order to discharge excess water in the oil-water separation tank via the eductor from the bottom of the oil-water separation tank. A spilled oil recovery device comprising a surplus water discharge section leading to the suction port of the eductor.