JPH10230189A - Water stream type oil recovery apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the oil recovery effectively of a water stream type oil recovery apparatus. SOLUTION: In a water stream type oil recovery apparatus equipped with a polluted water introducing duct, a cylindrical cyclone chamber 14 and an oil component recovery mechanism, a jet nozzle 34 jetting high pressure water from the outside, a plurality of trumpet-shaped nozzles 36, 38, 40, 42, 44 surrounding the jet orifice of the jet nozzle 34 and continuously arranged on the inner wall surface of the cyclone chamber 14 in a circular arc shape are provided. The vortex stream in the cyclone chamber 14 can be accelerated by the jetting of high pressure water from the jet nozzle 34 and the discharge amt. of purified water from a discharge port can be increased and oil recovery efficiency can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for purifying a water surface by recovering oil floating on, for example, a fresh water surface or a sea water surface (hereinafter referred to as a water surface). The present invention relates to a water-flow type oil recovery apparatus that separates and recovers water using a relative flow between the apparatus and contaminated water.

[0002]

2. Description of the Related Art In recent years, the water surface has often been contaminated with oil due to a complex accident, a tanker accident, or the like, which has become a major environmental problem. Currently, as a means of purifying such contaminated seawater (or freshwater), contaminated water is taken into the equipment using the relative flow of contaminated water generated by navigating the contaminated water area, and the contaminated water is contaminated inside the equipment. 2. Description of the Related Art A water-flow type oil recovery apparatus for separating and recovering oil from water is known (see Japanese Patent Publication No. 53-8378).

[0003] This water-flow type oil recovery device is provided with a contaminated water introduction duct in the shape of a square tube, and contaminated water introduced into the duct through the contaminated water introduction port is subsequently converted into a cylindrical shape called a cyclone chamber. Introduced into the chamber. The cyclone chamber and the contaminated water introduction duct communicate with each other through a contaminated water intake port opened in the tangential direction of the cyclone chamber, and due to this positional relationship, the contaminated water taken into the cyclone chamber is on its inner wall surface. And so-called vortices occur. Oil is recovered from the contaminated water by centrifugal separation due to the vortex in the cyclone chamber, and the oil collected in the central area of the vortex is sucked by an oil suction pipe provided on the axis of the cyclone chamber. A discharge port is provided at the lowermost part of the cyclone chamber, so that the purified water after recovering the oil can be discharged to the outside of the cyclone chamber.

[0004]

By the way, in the above-mentioned water-flow type oil recovery apparatus, when the navigation speed of the hull increases and the relative speed of the contaminated water increases, the contaminated water introduced into the intake port is increased. The amount gradually increases and stays in the intake duct, and eventually the main body of the device itself becomes a water flow resistance, and contaminated water overflows from the intake to the outside. Problems such as the spread of That is, in this water-flow type oil recovery device, the amount of contaminated water that can be taken in is limited due to the water flow resistance of the device itself, and it has been difficult to improve the oil recovery efficiency.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an oil recovery device capable of significantly improving the oil recovery efficiency as compared with a conventional water-flow type oil recovery device.

[0006]

In order to achieve the above object, a cylinder having a discharge port for discharging purified water after oil separation is provided at the lowermost portion, as in a water flow type oil recovery apparatus according to the present invention. Utilizing the relative flow of the contaminated water generated by the forward movement of the hull, and using the relative flow of the contaminated water generated by the forward movement of the hull, contaminated water introduction that guides the contaminated water to the inside of the cyclone chamber through a contaminated water intake port opened tangentially to the cyclone chamber In the water-flow type oil recovery device having a duct and an oil recovery mechanism for separating and recovering an oil component from a central portion of a vortex generated in the cyclone chamber by introducing the contaminated water from the contaminated water introduction duct in a tangential direction of the cyclone chamber, The cyclone chamber is formed such that the lowermost wall surface is gradually widened in an arc shape so as to protrude outward along the rotation direction of the vortex, and a widened portion is formed so as to reach a discharge port. Providing the vortex flow accelerating means for the speed of the vortex of the cyclone chamber by sequentially increasing directing clarified water to the discharge port, a technical idea of the present invention to solve the problems.

[0007] With this configuration, the discharge speed of the purified water from the discharge port can be accelerated, the amount of contaminated water taken into the device increases, and the oil recovery efficiency can be improved.

According to a second aspect of the present invention, there is provided a water flow type oil recovery apparatus, wherein the vortex accelerating means for the purified water whirls the high pressure water pumped from outside the cyclone chamber from near the inner wall of the cyclone chamber. Jet nozzles, and a plurality of trumpet-shaped nozzles continuously arranged in an arc along the inner wall surface of the cyclone chamber, of which the plurality of trumpet-shaped nozzles are arranged at the most upstream side of the vortex flow. The located trumpet-shaped nozzle is disposed such that its large-diameter portion surrounds the jet nozzle of the jet nozzle, and the other trumpet-shaped nozzles each have a large-diameter portion that is adjacent to the upstream side of the vortex. It is the vortex acceleration means necessary to solve the problem to be arranged so as to surround the jet port of the present invention, and the creation of this means is the essence of the present invention.

In this case, the high-pressure water fed from the outside of the cyclone chamber is jetted from the vicinity of the inner wall of the cyclone chamber through a jet nozzle in the direction of the overflow rotation to accelerate the overflow rotation speed. That is, the high-pressure water can be prevented from being merged once with the overflow in the cyclone chamber by the continuous arrangement of the plurality of flared nozzles. This is because the difference gradually decreases, and an attempt is made to reduce the energy loss due to the merging.

Further, when the high-pressure water from the jet nozzle flows in an arc shape, the occurrence of the phenomenon that the water flow shape is distorted and the cylindrical shape is distorted is considerably suppressed by the action of the continuously arranged plural flared nozzles according to the present invention. The flow of the high-pressure water is rectified so as to maintain a substantially cylindrical shape, so that the efficiency of joining the high-pressure water and the overflow in the cyclone chamber is increased.

Further, in the water flow type oil recovery apparatus according to the invention of claim 3, the diameter of each injection port of the trumpet-shaped nozzle is
The size is set to be larger than the diameter of the injection port of the flared nozzle adjacent to the upstream side of the vortex. This is because it is possible to avoid energy loss due to the vortex in the new cyclone chamber joining the high-pressure water injected from the upstream side of the vortex, to adjust the shape of the water flow, and to improve the efficiency of the merge. is there.

In the water-flow type oil recovery apparatus according to the fourth aspect of the present invention, each flared nozzle is disposed so as to be positioned lower than the flared nozzle adjacent to the upstream side of the vortex. this is,
In the cyclone chamber, since the purified water flows down while turning, the vortex velocity of the purified water is increased, and in order to quickly discharge the water from the discharge port, the direction of the water flow rectified by the plurality of trumpet-shaped nozzles and This is because it is necessary to match the direction of the flow of the purified water.

[0013] The cyclone chamber has an axis substantially perpendicular to the surface of the contaminated water, a first cylindrical portion extending from above the water surface to below the water surface, and a continuous line extending from the first cylindrical portion to the first cylindrical portion. A second substantially cylindrical portion formed so as to gradually reduce its cross-sectional area downward, the oil recovery mechanism is connected to the first cylindrical portion, and the discharge port is connected to the second cylindrical portion. By providing it in a substantially cylindrical portion, it is possible to separate oil and efficiently discharge purified water.

Further, preferably, the oil recovery mechanism comprises:
A suction pump mounted on the hull; and an oil suction pipe connecting the suction pump and the cyclone chamber.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a water jet type oil recovery apparatus according to the present invention will be described below with reference to the drawings. FIG.
Is a perspective view of the appearance of a water-flow type oil recovery device mounted on a hull, and FIG. 2 is a plan view thereof. 1 and 2, a water-flow type oil recovery device 10 includes a cylindrical contaminated water introduction duct 12 attached to the side of the hull A, and the introduction duct 1.
2 is provided with a cylindrical cyclone chamber 14 connected continuously and a recovery mechanism 16 for oil separated from contaminated water. In addition,
In the drawing, the water-flow type oil recovery device 10 is mounted only on one side of the hull A, but may be mounted on both sides of the hull A to increase the oil recovery capacity as an oil recovery boat.

The contaminated water introduction duct 12 is provided with an introduction port 18 opened in the traveling direction of the hull A for introducing the contaminated water B, and the opposite side of the duct 12 is a tangent to the cyclone chamber 14. Contaminated water intake 20 opened in the direction
It is connected to the.

Inside the contaminated water introduction duct 12, a guide plate 22 curved and formed with a gentle curve so that the flow path cross-sectional area gradually decreases from the introduction port 18 to the contaminated water intake port 20 of the cyclone chamber 14. Is provided.
The guide plate 22 allows the duct 1 to pass through the inlet 18.
The flow direction of the contaminated water B taken into the pipe 2 is directed to the contaminated water inlet 20 as shown by an arrow a in the figure. Further, the cyclone chamber 14 is connected via the contaminated water inlet 20.
The contaminated water B flowing into the inside flows along the inner wall surface of the cyclone chamber 14, thereby generating a swirling flow (vortex flow) as indicated by an arrow b.

The cyclone chamber 14 connected to the contaminated water introduction duct 12 has a first cylindrical portion 14a having an axis substantially perpendicular to the surface of the contaminated water B, and a cyclone chamber 14a located below the first cylindrical portion 14a and gradually cutting off. And a second cylindrical portion 14b for reducing the area. The above-mentioned contaminated water intake 20 is provided in the first cylindrical portion 14a, and an oil-absorbing pipe 24 for discharging oil from contaminated water B in the cyclone chamber 14 to the outside is connected thereto.

The other end of the oil absorption pipe 24 is connected to a suction pump 26 installed on the hull A. The suction pump 26 is connected to a recovery oil tank 28, and the hull A is The oil collected to the side is finally accumulated in the collected oil tank 28. In the present embodiment, the oil suction pipe 24, the suction pump 26, and the collected oil tank 28 constitute the oil recovery mechanism 16.

On the other hand, a discharge port 30 for discharging purified water containing no oil to the outside of the cyclone chamber is provided at the lowermost portion of the second cylindrical portion 14b having a substantially frustoconical cross section.
The outlet 30 is positioned so as to open to the downstream side of the navigation of the ship.

FIGS. 3 and 4 are partial cross-sectional views of the lowermost part of the cyclone chamber showing the positional relationship between the discharge port 30 and an ejector 32 described later, and FIG. 5 is a partial vertical cross-sectional view thereof.

As is clear from these figures, the cyclone chamber 14 is widened in an arc shape so that the lowermost wall surface gradually projects outward along the rotation direction of the vortex in the cyclone chamber, and reaches the discharge port 30. Widened portion 14 formed as follows
The arc-shaped widened portion 14c has a jet nozzle 34 for injecting high-pressure water pumped from the outside of the cyclone chamber 14 in the vortex water flow direction from near the inner wall of the cyclone chamber, and a nozzle fixing plate on the wall. An ejector 32 (eddy current accelerating means) including a plurality of trumpet-shaped nozzles 36, 38, 40, 42, and 44 attached via a nozzle 48 is provided.

The jet nozzle 34 is formed so as to penetrate the wall of the second cylindrical portion 14b from the outside of the cyclone chamber 14 and extend substantially in a tangential direction. A jet water supply pipe 46 is provided outside the cyclone chamber. Through this, it is connected to a high-pressure water pump (not shown) mounted on the hull A.

In this case, the jet nozzle 34 and each of the trumpet-shaped nozzles 36 to 44 are continuously arranged in an arc along the inner wall surface of the cyclone chamber on the same plane. If the height position of the nozzle is continuously arranged so that the height position gradually becomes lower along the water flow direction, the water flow direction of the high-pressure water to be injected coincides with the water flow direction of the vortex flowing down while rotating in the cyclone chamber. As a result, the purified water can be smoothly and quickly discharged from the outlet of the cyclone chamber. The large-diameter opening 36a of the trumpet-shaped nozzle 36 located on the most upstream side surrounds the jet port 34a of the jet nozzle 34, and the small-diameter opening (spout port) 36b of the trumpet-shaped nozzle 36 is located downstream of the vortex. It is surrounded by the large-diameter opening 38a of the flared nozzle 38 adjacent to the side. Less than,
Similarly, each of the trumpet-shaped nozzles 40, 42, and 44 is arranged so as to surround the nozzle outlet adjacent to the vortex upstream.

By configuring the ejector 32 in this manner, in the cyclone chamber 14, when high-pressure water is first injected from the jet nozzle 34, a negative pressure region is generated around the injection port 34a, and suction of the negative pressure region is performed. By the action, the water flow (part) in the cyclone chamber is drawn into the trumpet-shaped nozzle 36 as shown by an arrow c (see FIGS. 3 and 4).
Similarly, the water flow is drawn into each of the trumpet-shaped nozzles 38 to 44, and the water flow is gradually accelerated. That is, in the present embodiment, the high-pressure water injected from the jet nozzle 34 is prevented from merging with the water flow in the cyclone chamber at a time, and a part of the water flow gradually merges with the high-pressure water, so that the multistage Wrapper nozzle 3 in continuous arrangement
This is because the difference between the flow velocities in the stages 8 to 44 gradually decreases, and the energy loss associated with the merge can be reduced.

The diameter of the outlets 36b to 44b of the trumpet-shaped nozzles 36 to 44 is set to be larger as the position thereof is closer to the outlet. By doing so, it is possible to avoid energy loss due to a new vortex in the cyclone chamber joining the high-pressure water, to adjust the shape of the water flow, and to increase the efficiency of the merge.

The operation of the water flow type oil recovery apparatus 10 configured as described above will be described below. First, when the hull A is moved forward at a predetermined speed, a relative flow is generated between the hull A and the water surface, and the contaminated water B containing oil floating on the water surface is contaminated through the inlet 18 as described above. It is taken into the water introduction duct 12, further flows along the guide plate 22, and flows into the cyclone chamber 14 from the contaminated water intake 20 opened in the tangential direction of the cyclone chamber. The contaminated water B after flowing in becomes a vortex in the cyclone chamber depending on the flowing direction, and is centrifuged into oil and other purified water concentrated in the central region.

The oil collected in the central area of the cyclone chamber 14 by the centrifugal separation function is pumped by the suction pump to the recovery oil tank 2 through the oil suction pipe 24.
8 and stored here.

On the other hand, the purified water after oil separation is discharged to the outside through a discharge port 30 which opens in the tangential direction in the lower part of the cyclone chamber 14 while forming a swirl. In this case, the outlet 30
By the action of the above-mentioned multi-stage flared nozzles 36 to 44 provided in the vicinity of the upstream side, the high-pressure water flow shape is hardly distorted, and the high-pressure water jetting action and the flared nozzles 36 to 44 The vortex drawing action accelerates the vortex in the cyclone chamber, and the purified water is vigorously discharged from the discharge port 30 to the outside. That is, according to the water-flow type oil recovery device 10 according to the present invention, the vortex is accelerated in the purified water discharge port area to increase the discharge capacity, so that the oil-water separation capacity is increased,
As a result, the amount of contaminated water that can be taken in increases, and the oil recovery efficiency can be improved.

The embodiment of the present invention has been described above.
The eddy current accelerating means is a high-pressure water injection type ejector as shown in the figure, but the features of this method are that there are no moving parts, there is no power source, and therefore no explosion-proof mechanism is required,
Simple structure and consequently simple handling.
However, the present invention is not limited to this method. For example, if explosion-proofing is possible, any other mechanism such as providing a screw (not shown) near the inner wall of the cyclone chamber may be used. If this ejector system is provided in the contaminated water introduction duct, the contaminated water will be stirred, and the oil water will be emulsified, making it impossible to separate the oil water. For this reason, the ejector is provided at a suitable place where the purified water after the oil separation is affected.

[0031]

As described above, according to the present invention,
By sequentially accelerating the vortex velocity in the cyclone chamber of the purified water after oil separation and recovery by the overflow acceleration means, it can be increased without energy loss, and the effect of centrifugal oil-water separation is enhanced. Since the discharge amount is increased by the discharge means to the outside of the cyclone chamber, a large amount of contaminated water can be introduced into the apparatus, and the oil recovery operation can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a water-flow type oil recovery device according to the present invention.

FIG. 2 is a plan view of the water-flow type oil recovery device of FIG.

FIG. 3 is a partial cross-sectional view of the lowermost part of the cyclone chamber showing the ejector of FIG. 2;

FIG. 4 is a partial cross-sectional view of the lowermost part of the cyclone chamber showing the ejector of FIG. 2;

FIG. 5 is a partial vertical sectional view of the lowermost part of the cyclone chamber showing the ejector of FIG. 2;

[Explanation of symbols]

 10: Water-flow type oil recovery device 12: Contaminated water introduction duct 14: Cyclone chamber 14c: Arc-shaped widened portion 16: Oil recovery mechanism 18: Inlet 20: Contaminated water intake 22: Guide plate 24: Oil absorption pipe 26: Suction pump 28 : Recovery oil tank 30: Discharge port 32: Ejector (vortex acceleration means) 34: Jet nozzle 36, 38, 40, 42, 44: Trump-shaped nozzle 46: Jet water pipe 48: Nozzle fixing plate A: Hull B: Contaminated water

Claims (6)

[Claims] 1. An oil recovery device mounted on a hull for separating and recovering oil from contaminated water mixed with oil and water, wherein the lower end has a discharge port for discharging purified water after oil separation. And a contaminated water introduction duct for guiding contaminated water to the inside of the cyclone chamber through a contaminated water intake port opened in a tangential direction of the cyclone chamber using a relative flow of the contaminated water generated by forward movement of the hull. And a oil recovery mechanism that separates and recovers oil from the center of a vortex generated in the cyclone chamber by introducing contaminated water from the contaminated water introduction duct in a tangential direction of the cyclone chamber. The chamber has a widened portion formed such that the lowermost wall surface is gradually widened in an arc shape so as to protrude outward along the rotation direction of the vortex and reaches the discharge port,
A water-flow type oil recovery apparatus characterized in that a vortex acceleration means for sequentially increasing the speed of the vortex in the cyclone chamber and guiding purified water to an outlet is provided in the arc-shaped widened portion. 2. A jet nozzle for injecting high-pressure water pumped from outside the cyclone chamber in the rotation direction of the vortex from near the inner wall of the cyclone chamber, and a vortex accelerating means along the inner wall surface of the cyclone chamber. And a plurality of flapper-shaped nozzles arranged continuously in an arc shape. Of the plurality of wrapper-shaped nozzles, a wrapper-shaped nozzle located at the most upstream side of the vortex has a large-diameter portion formed by an outlet of the jet nozzle. The other flared nozzles are also arranged so that each large diameter portion surrounds the outlet of the flared nozzle adjacent to the upstream side of the vortex. 2. The water flow type oil recovery device according to 1. 3. The horn according to claim 2, wherein the diameter of each of the spouts is set to be larger than the diameter of the spout of the flared nozzle adjacent to the upstream side of the vortex. A water flow type oil recovery device as described in the above. 4. The nozzle according to claim 2, wherein each of the horn-shaped nozzles is sequentially arranged so as to be positioned lower than an adjacent horn-shaped nozzle on the upstream side of the vortex. 2. A water-flow type oil recovery device according to claim 1. 5. The first cyclone chamber has an axis substantially perpendicular to the surface of the contaminated water, and extends from above the water surface to below the water surface.
And a second substantially cylindrical portion which is continuous with the first cylindrical portion and is formed so as to gradually decrease its cross-sectional area toward the lower side of the axis. 5. A discharge port connected to a first cylindrical portion, wherein the outlet is provided in the second substantially cylindrical portion.
A water-flow type oil recovery device according to any one of the above. 6. The oil recovery mechanism according to claim 1, further comprising a suction pump mounted on the hull, and an oil suction pipe connecting the suction pump and the cyclone chamber. 2. A water-flow type oil recovery device according to claim 1.