JP4904535B2 - Oil / water separator for recovered spilled oil - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil-water separation device for recovered spilled oil for separating water mixed in oil when recovering oil such as crude oil spilled to the sea surface or water surface from an oil tanker, a seabed or a bottom oilfield drilling rig or the like.
[0002]
[Prior art]
Conventional methods for recovering oil such as crude oil and heavy oil (hereinafter referred to as spilled oil) that have spilled to the sea surface include vacuum suction, mop towing recovery, rotary drum scraping recovery, and grab bucket recovery. It is used according to various conditions such as spill volume, spill location, and contamination status. Among these recovery methods, the grab bucket recovery method collects spilled oil by opening and closing a grab bucket suspended from a crane mounted on a carrier, for example, opening the bucket with the spilled oil collected in the storage tank of the recovery ship It is a method of dropping. This method has an advantage that it is excellent in recovery efficiency when recovering highly viscous oil such as crude oil, and can be recovered even when the sea is rough.
[0003]
[Problems to be solved by the invention]
However, when oil floating on the sea surface is collected with a grab bucket, it is impossible to collect only the oil, and seawater will always be pumped up. For this reason, seawater will be stored together with oil in the storage tank of the recovery and transportation ship, and there is a problem that the storage tank becomes full early. Therefore, in the recovery operation, it is necessary to increase the number of recovery carriers or to speed up the recovery cycle per yard. In addition, since the inside of the storage tank is in a state where oil and water are mixed, there is a disadvantage in that further work for separating oil and water must be performed on land, and much time, labor and cost are required for the recovery work. .
[0004]
Furthermore, when oil spill is collected in the ice sea using a grab bucket, an ice lump is collected together with the oil and seawater, so that there is a drawback that the load capacity of the recovery transport ship reaches the allowable load capacity at an early stage.
[0005]
The present invention has been made in view of the above-described drawbacks of the prior art, and by using the difference in specific gravity between oil and water in the spilled oil, oil and water can be separated reliably and efficiently with a simple device, In addition, oil and water are separated at the time of recovery, making it easy to process the oil afterwards. In addition, it is possible to cope with oil spill accidents in the ice sea where ice blocks are floating, and to separate oil and water from spilled oil even in stormy weather It is an object of the present invention to provide an oil-water separator for recovered spilled oil that can be used.
[0006]
[Means for Solving the Problems]
The means of the invention according to claim 1 configured to solve the above-described problem includes an inclined plate for causing the recovered spilled oil to flow down from the upper end side, and a plurality of oil-water separation holes formed in the inclined plate. The separation oil recovery tank installed on the lower end side of the inclined plate and the separated water recovery tank installed below the inclined plate are mounted on a trolley, and the inclined plate has a substantially semicircular shape in longitudinal section. And the inclined plate is held in a predetermined inclined state by the attitude control means regardless of the swing of the carriage .
[0007]
According to a second aspect of the present invention, there is provided a slope plate for causing the recovered spilled oil to flow down from the upper end side, a plurality of oil-water separation holes formed in the slope plate, and a lower end of the slope plate. It consists of a separated oil recovery tank installed on the side and a separated water recovery tank installed below the inclined plate.
[0008]
And after removing the ice block mixed in the recovered spilled oil by the ice block removing means, the spilled oil may flow down onto the inclined plate. By doing so, oil-water separation work of the spilled oil in the ice sea where the ice blocks are floating can be performed without any trouble.
[0009]
Further, the inclined plate may be configured such that the inclination angle between the upper end side and the lower end side is variable. By so doing, when the viscosity of the recovered oil is high, the inclination of the inclined plate can be adjusted and the separation operation can be performed quickly.
[0010]
Further, in the oil / water separator for recovered spilled oil according to claim 1, wherein the means constituting the invention according to claim 5 is mounted on a carriage, the inclined plate is formed in a substantially semicircular shape in longitudinal section, and The inclined plate may be held in a predetermined inclined state by the attitude control means regardless of the swinging of the carriage. As a result, oil and water can be separated even on stormy seas where the trolley rolls and pitches.
[0011]
Since the recovered water stored in the separated water recovery tank is filtered and then returned to the water area, the storage amount of recovered oil can be increased accordingly.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the figure, reference numeral 1 denotes a hopper for introducing spilled oil recovered using a grab bucket A. The hopper 1 is composed of a leg portion 2 in which steel materials are combined and a hopper main body 3 installed on the leg portion 2. The hopper body 3 is configured in a box shape with the upper side opened from the front, rear plates 3A and 3B, the pair of side plates 3C and 3C, and the bottom plate 3D. An outlet 4 is formed so as to project an outlet 4A. An ice lump discharge port 5 is formed on the upper side of the rear plate 3B.
[0013]
Reference numeral 6 denotes an ice lump discharger provided on the upper side of the hopper body 3 so as to be detachable from the front plate 3A to the rear plate 3B. Although the spilled oil drops without any trouble in the ice lump discharger 6, a plurality of metal rods are placed at a predetermined interval so that a certain large ice lump slides down and falls outside the hopper 3 from the ice lump discharge port 5. Are arranged in a row. Needless to say, the ice lump discharger 6 may be installed when there is an ice lump in the sea or the like from which oil has flowed out.
[0014]
Reference numeral 7 denotes an inclined plate made of a steel plate or a synthetic resin for flowing down the spilled oil charged into the hopper 1 from the upper end side to the lower end side. The inclined plate 7 is formed in a shallow bowl-like shape from a vertically long flat plate portion 7A and a pair of side plates 7B, 7B standing at both ends in the width direction of the flat plate portion 7A. The upper end side 7C is pivotally supported by a support column 7E in a state where the lower end side 7D protrudes into a separation oil recovery tank 12 which will be described later.
[0015]
8, 8,... Indicate a plurality of oil / water separation holes formed of round holes formed in a state of being distributed over substantially the entire surface of the flat plate portion 7 A of the inclined plate 7. Here, in determining the individual areas and the number of formation of the oil / water separation holes 8, as a result of the experiment, a correlation was found between the unit width flow rate of the spilled oil that causes the inclined plate 7 to flow down, the length and the gradient of the inclined plate 7. Therefore, the total opening ratio of the inclined plate 7 is set, and the opening area and the number of formation of each oil / water separation hole 8 are set in consideration of the viscosity of the oil and the like.
[0016]
Reference numeral 9 denotes an attitude control device for changing the inclination angle by moving the lower end side 7D of the inclined plate 7 up and down in the direction of the arrow. The posture control device 9 is based on the flow rate sensor 10 provided on the upper end side 7C of the inclined plate 7, the hydraulic cylinder device 11 connected between the installation body and the lower end side 7D of the inclined plate 7, and the flow rate signal of the flow rate sensor 10. A control panel (not shown) for operating the hydraulic cylinder device 11 is configured. The hydraulic cylinder device 11 operates to increase the tilt angle when the spilled oil is highly viscous to increase the flow speed of the flow rate oil, and to decrease the tilt angle when the flow rate of the spilled oil is large. .
[0017]
Reference numeral 12 denotes a separated oil recovery tank installed on the lower end side 7D of the inclined plate 7. The separation oil recovery tank 12 is formed in a box shape with the upper side open from the bottom plate 12A, the four frame plates 12B, 12B,..., And the lower end of the inclined plate 7 on the upper side of the rear frame plate 12B. A notch 12C from which the side 7D protrudes is formed. The separated oil recovery tank 12 is connected to an oil discharge pipe 13 provided with an on-off valve 13A and a drain plug 14. On the other hand, 15 is a separated water recovery tank installed directly below the inclined plate 7, and the separated water recovery tank 15 is configured in a box shape with the upper side open, and flows through the lower layer on the inclined plate 7 to oil-water separation holes 8. , 8,... For containing the water that has dropped. The separated water recovery tank 15 is connected with a water return pipe 16 for filtering the collected recovered water and returning it to the water area.
[0018]
The present embodiment has the above-described configuration, and the spilled oil recovered by the grab bucket A is dropped into the hopper body 3. When ice blocks are mixed in the collected spilled oil, the ice blocks are slid down by the ice block discharger 6 installed at an inclination and discharged onto the sea. The spilled oil passes through the ice lump discharger 6 and is stored in the hopper body 3 and flows from the oil outlet 4 onto the inclined plate 7 via the spilling basin 4A. And since the specific gravity of oil is smaller than seawater in a wide temperature range from low temperature to normal temperature in the ice sea, seawater flows through the lower layer on the inclined surface 7 and oil flows through the upper layer, and water with a higher specific gravity is separated into oil and water. The oil drops from the holes 8, 8,... Into the separated water recovery tank 15, has a small specific gravity, and has a viscosity and flows on the inclined plate 7 and flows into the separated oil recovery tank 12.
[0019]
Thus, according to the present embodiment, the ice block mixed in the spilled oil can be automatically released to the sea by the ice block discharger 6. Moreover, the spilled oil can also be automatically separated into oil and water by the difference in specific gravity only by flowing down on the inclined plate 7 formed with a large number of oil-water separation holes 8, 8,. Moreover, even if some water is mixed in the separated oil recovery tank 12, it is possible to substantially separate the water and recover only the oil by discharging it from the drain plug 14, so that the separation work is easy and the work is performed. Excellent efficiency.
[0020]
2 and 3 show a second embodiment. In addition, in this Embodiment, the same code | symbol is attached | subjected and used for the component same as the component of 1st Embodiment, and the description is abbreviate | omitted. In the figure, 21 is a carriage, 22 is a hopper mounted on the carriage 21, and the hopper 22 is composed of a leg portion 23 and a hopper body 24 supported by the leg portion 23. The hopper body 24 is configured in a box shape with the upper side opened from the front, rear plates 24A, 24B, side plates 24C, 24C and the bottom plate 24D, and semicircular oil outlets 25, 25 formed on the front plate 24A. 25 is provided with concavely curved guide plates 25A, 25A, 25A. In addition, an ice lump discharge port 26 is formed in each side plate 24C.
[0021]
Reference numerals 27, 27, and 27 denote three inclined plates installed corresponding to the respective oil outlets 25. Each of the inclined plates 27 is a long plate formed in a concave curved shape so that the spilled oil does not scatter even when the carriage 21 is rolled, and a large number of oil-water separation holes 28, 28,. It is. The inclined plate 27 is supported by a support body 29 whose upper end side 27A is fixed to the front plate 24 so as to be pivotable in the vertical direction via a connecting pin 30, and the lower end side 27B protruding on the separated oil recovery tank 12 is supported. Is supported by a concavely curved receiving member 31 fixed to the separated oil recovery tank 12 so as to be able to contact and separate. The three inclined plates 27 are integrally connected by a connecting plate 32.
[0022]
Reference numeral 33 denotes an attitude control device for holding the inclined plate 27 at a predetermined inclination angle even when the boat 21 is pitched due to rough weather. The attitude control device 33 includes a bracket 33A provided on the inclined plate 27, the carriage 21 The hydraulic cylinder device 33B connected between the two, the tilt sensor for detecting the swing angle of the front and rear sides of the carriage 21 and the signal from the tilt sensor make the hydraulic cylinder device 33B correspond to the oscillation of the carriage 21. The control panel is operated (however, the tilt sensor and the control panel are not shown). The posture control device 33 also has a function of adjusting the inclination angle of the inclined plate 27 based on the flow rate signal from the flow rate sensor 10.
[0023]
The present embodiment has the above-described configuration, and separates the oil and water of the recovered spilled oil, and the action of storing the oil in the separated oil recovery tank 12 and the water in the separated water recovery tank 15 is the first. This is substantially the same as the embodiment. However, since the inclined plate 27 is formed in a concave curved shape, it is possible to prevent the spilled oil flowing down on the inclined plate 27 from being scattered to the surroundings even when the trolley 21 rolls during stormy weather. Also, when the carriage 21 is pitched, the inclination plate 27 maintains a predetermined inclination angle optimum for the separation of oil and water by adjusting the vertical height of the inclination plate 27 by the action of the attitude control device 33. can do.
[0024]
In the present embodiment, three inclined plates 27 are installed. However, the number of installed inclined plates 27 can be appropriately determined from the processing capacity of the spilled oil.
[0025]
【Effect of the invention】
Since the present invention is configured as described above, the following effects can be obtained.
(1) Utilizing the difference in specific gravity between oil and water, the spilled oil collected on the inclined plate is caused to flow down, the lower layer water is dropped from the oil / water separation hole of the inclined plate, and the upper layer oil is caused to flow down on the inclined plate. In the configuration in which the oil / water separation device is mounted on the trolley, the inclined plate is formed in a substantially semicircular shape in longitudinal section, and the inclination control means is used to set the inclination angle above and below the inclined plate in a predetermined state regardless of the oscillation of the trolley. Therefore, even when the trolley rocks and rolls during stormy weather, the oil / water separation work of the spilled oil can be performed without any trouble.
(2) Oil / water separation utilizes the difference in specific gravity, and the oil and water are separated by flowing down from the upper end side on an inclined plate provided with a plurality of oil / water separation holes. The configuration of the oil is simple, and the oily water can be reliably and promptly separated.
(3) Since the ice block mixed in the recovered spilled oil is removed by the ice block removing means, the spilled oil is allowed to flow down on the inclined plate, so that the oil separation work of the spilled oil in the ice sea where the ice block is floating is also possible. It can be done without hindrance.
(4) Since the inclined plate is configured so that the vertical inclination angle is variable, it can be adjusted to the flow speed in consideration of the viscosity and flow rate of the oil, and the efficiency of the separation work can be improved.
(5) Since the water stored in the separated water recovery tank is filtered and recirculated to the water area, it is not limited by the water storage capacity of the separated water recovery tank, and continuous operation of the separation work is possible.
[0026]
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an oil-water separator for recovered spilled oil according to a first embodiment of the present invention.
FIGS. 2 and 3 relate to a second embodiment, and FIG. 2 is an overall configuration diagram of an oil-water separator for recovered spilled oil.
FIG. 3 is an enlarged perspective view of a main part of an oil / water separator for recovered spilled oil.
[Explanation of symbols]
6 Deicing body 7, 27 Inclined plate 8, 28 Oil / water separation hole 9, 33 Attitude control device 12 Separation oil recovery tank 15 Separation water recovery tank 21

Claims (4)

An inclined plate for causing the recovered spilled oil to flow down from the upper end side, a plurality of oil / water separation holes formed in the inclined plate, a separated oil recovery tank installed on the lower end side of the inclined plate, and below the inclined plate It is composed of an installed separated water recovery tank and is mounted on a trolley, and the inclined plate is formed in a semi-circular shape in vertical section, and the inclined plate is set to a predetermined shape regardless of the swing of the trolley by the attitude control means. oil-water separator of the oil spill recovered you characterized that you have to hold the inclined state.   The oil / water separator for recovered spilled oil according to claim 1, wherein the spilled oil flows down onto the inclined plate after the ice lumps mixed in the recovered spilled oil are removed by the ice block removing means.   The oil / water separator for recovered spilled oil according to claim 1, wherein the inclined plate is configured such that the inclination angle of the upper end side and the lower end side is variable. Oil-water separator of the recovered oil spill of the separated water collection tank collecting water accumulated in the claim 1, wherein is arranged to reflux in water after filtration.

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