JP3288643B2 - Liquid material recovery device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid recovery apparatus, and more particularly, to an oil spill floating on a liquid surface of a sea, a river, a lake, a storage tank, a fish farm, etc. The present invention relates to a technique for collecting sludge and the like.

[0002]

2. Description of the Related Art Conventionally, oil that has flowed out of a tanker, for example, has been recovered by a method such as suction, adsorption, or scraping. The suction method is to suck the oil that has flowed out onto the water surface (sea surface) with a pump (suction pump).
The adsorption method is a method in which an oil collecting material is brought into contact with an oil layer on the water surface to selectively recover only oil, and the scraping method is a method in which high-viscosity oil and waste oil balls are scooped or scraped. In addition, the shore is scooped with a ladle mainly by human tactics.

[0003]

However, any of the above methods has a problem in that if the oil spreads widely over the water surface and the processing density is low, efficient recovery cannot be performed. In particular, on a water surface with waves, the recovery efficiency is extremely reduced. By the way, in the case of the suction system, measures such as providing an inflow weir near the suction port of a large pump or adjusting the height of the suction port with a float are taken in order to suck only the oil flowing out to the water surface. Normally, a spot is sucked from one suction port in a spot-like manner.
Therefore, it is good when the processing amount (the amount of oil) per unit area is large, but when the oil spreads over a wide area and the processing density is low, efficient suction processing cannot be expected.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an apparatus capable of efficiently recovering a liquid material spread widely over a liquid surface or a liquid bottom.

[0005]

The above object is achieved by a liquid material recovery apparatus having the structure described in each of the claims. The liquid substance here specifically refers to spilled oil or sludge, but includes other liquids, turbid liquids, suspensions, and the like. The liquid material recovery device according to claim 1 is used in a state where the cylindrical suction chamber is floated on the liquid surface or settled on the liquid bottom. At that time, the liquid material in the suction chamber flows to one end side of the suction chamber by the discharge action of the discharge means and the transfer action of the rotating body. That is, since the liquid material is sucked into the suction chamber from the plurality of suction ports provided side by side on the line, the liquid material spread widely on the liquid surface and the liquid bottom is efficiently collected. In addition, since this apparatus can be used for collecting the liquid material at the liquid surface and the liquid bottom, it is easy to increase the utilization rate of the equipment. Note that the cylindrical suction chamber and the rotating body constitute a pump, and the rotating body is preferably, for example, a spiral impeller (screw).

In the liquid material recovery apparatus according to the second aspect of the present invention, the pump action by the rotation of the screw causes an axial flow in the suction chamber to generate suction force at each suction port. In conjunction with discharging the material, the liquid material is sucked from the respective inlets almost equally. That is, since the suction chamber can be formed in an elongated shape and provided with a relatively simple screw therein, it is suitable for collecting a liquid material spread in a layered manner. Note that the above-described discharge means reduces pressure loss on the discharge side of the screw pump, and may be a suction means for sucking a liquid material in the suction chamber.

Further, in the liquid material recovery apparatus according to the third aspect, when the screw rotates at high speed in the cylindrical suction chamber, a negative pressure is generated on the upper surface side of the curved wing provided on the outer peripheral portion of the screw. Here, the negative pressure refers to the pressure drop, and the curvature refers to the warpage of the blade upper surface. Therefore, while the flow of the liquid material is promoted near the inner peripheral surface of the cylindrical suction chamber,
Since a pressure difference occurs between the inside and the outside of the suction port, it becomes easy to suck the liquid material.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway perspective view of the liquid material recovery device, and FIG. 2 is a partially cutaway front view of the liquid material recovery device.
As shown in both figures, the liquid material recovery apparatus 1 has a long and narrow suction chamber 2 extending from the central recovery section 3 to both left and right sides, and is provided with a buoyancy-adjustable float 4 at the tip of the suction chamber 2. The liquid material sucked from the suction port 2a is collected in the tank 3 of the collection unit 3.
a, from which the liquid material is discharged by discharge means such as a pump.

The left and right suction chambers 2 are formed by cylindrical pipes 2b and have closed ends. A large number of suction ports 2a are formed on a side surface of the cylindrical pipe 2b at a predetermined pitch on a straight line parallel to the axis. It looks like a flute. And
One end of the rotating body 5 inserted concentrically into the cylindrical pipe 2b is supported by a bearing provided at the tip of the cylindrical pipe 2b. The rotating body 5 is a screw extending in the axial direction, as described below.

As shown in enlarged scale in FIGS. 3 and 4, the rotating body 5 includes a helical base (vane) 5b which stands substantially radially from the shaft 5a and extends over substantially the entire length of the shaft 5a, and a helical base 5
and a wing portion 5c provided substantially in a band shape and a spiral shape on the outer peripheral portion of the cylindrical pipe 2b and near the inner peripheral surface of the cylindrical pipe 2b. As shown in the figure, the wing portion 5c has a so-called wing shape, and is curved in the circumferential direction along the inner peripheral surface of the cylindrical pipe 2b. That is, the rotating body 5
With the high-speed rotation, the spiral base 5b transfers the liquid material in the axial direction toward the recovery unit 3, and the flow on the upper surface of the blade is relatively accelerated by the blade 5c to generate a negative pressure. At that time, it is considered that the pressure distribution (only negative pressure is shown) as shown in both figures. This negative pressure promotes the suction force and the axial flow.

The twist directions of the spiral base 5b and the wing 5c are opposite to each other on the left and right sides of the recovery unit 3. This rotating body 5 is connected to a double-shaft type motor 6 arranged in the central recovery unit 3. This motor 6 is a driving means in the present invention. That is, the suction chamber 2 constitutes a pump having a screw that rotates in the cylindrical casing,
The liquid material flowing into the cylindrical pipe 2b from the suction port 2a is transferred to a tank 3a which is a closed type water collecting tank and pump chamber.

The collecting section 3 is provided with a submersible pump 3b as a discharging means, in addition to the motor 6 and the tank 3a, and discharges the liquid material in the tank 3a to an external processing device through a discharge pipe 9. Is done. In this case, the liquid material in the suction chamber 2 is transported toward the tank 3a by the rotating body 5, and is sucked into the tank 3a by the submersible pump 3b.

A rear end of the hood 7 which is held by the left and right floats 4 is connected to an upper portion of the cylindrical pipe 2b so as to guide a liquid material in front of the suction chamber 2 to the suction port 2a. . The hood 7 is preferably mounted so as to be rotatable around the axis of the cylindrical pipe 2b so that the hood angle can be adjusted. Both ends of a curved screen (net-like member) 8 are fixed to the lower portion of the hood 7 and the cylindrical pipe 2b.
This prevents foreign matter from entering the a. Further, the float 4 is formed so that buoyancy can be adjusted by increasing or decreasing the amount of water therein, and further, a weight can be attached.

By the way, as shown in FIGS. 5 and 6,
Between the screen 8 and the inlet 2a, a fountain means 10 for disturbing sludge or the like by a water flow, or a scraping means 1 such as a rotating brush
1 can be provided. In FIG. 5, reference numeral 10a denotes a support member serving also as a pipe connected to a pump (not shown). The nozzle 10b is configured to swing back and forth while jetting water. In FIG. 6, reference numeral 11a denotes a drive shaft connected to driving means such as a motor (not shown), and reference numeral 11b denotes a handle. The handle 11b is configured to swing back and forth while rotating the rotary brush 11c. The fountain means 10 and the scraping means 11 prevent the sludge that has passed through the screen 8 from accumulating and causing clogging, and facilitate suction. In addition, 2c in both figures is a banner for preventing the sludge from spreading backward.

Here, another example of the rotating body 5 will be described. The spiral rotator 15 having the cross-sectional shape shown in FIG.
A spiral base 15b that stands substantially in the radial direction from the shaft 15a and extends over substantially the entire length of the shaft 15a, and a wing portion 15c provided in a belt shape on the outer periphery of the spiral base 15b are integrally formed. A bulging portion 15d inscribed in the cylindrical casing 12 is provided at a tip position (edge) on the outer peripheral side of the wing portion 15c. The helical base portion 15b transfers the liquid material in the axial direction by the high speed rotation of the rotating body 15, and The bulging portion 15d entrains the liquid material to increase the suction force at the suction port 12a. In addition, it is preferable to combine with the above-mentioned discharge means (suction means) and the like so that the suction force at each suction port 12a is evenly generated.

Next, the manner of use of the liquid material recovery apparatus 1 configured as described above will be described. (1) Recovery work on the water surface The liquid material recovery device 1 is levitated, the buoyancy of the float tank 4 is adjusted so that the position of the suction port 2a matches the surface of the water, and then an appropriate traction means such as a ship or a winch is used. Tow,
The liquid material recovery device 1 is moved in a direction perpendicular to the axis of the suction chamber 2. As a specific example, as shown in FIG. 8, the tow rope 21 is towed by two ships 20 in a V-shape. In this case, it is preferable to attach an oil fence 22 to the tow rope 21 to collect the spilled oil.

In this state, a liquid material such as oil spill is drawn into the suction port 2a.
From the suction chamber 2. In the suction chamber 2, the rotating body 5 rotates at high speed, and the inflowing liquid material flows in the axial direction toward the central recovery section 3 by the pumping action of the rotating body 5, flows into the tank 3a, and flows into the tank 3a. Is sucked into the tank 3a, and is further fed through a discharge pipe 9 to a processing device (not shown). At this time, as described above,
A negative pressure is generated in the suction chamber 2 by the rotation of the wing portion 5c, and the suction force and the axial flow are promoted. Then, the pumping action of the rotating body 5 and the suction action of the submersible pump 3b are combined, so that it is possible to suck the liquid material from each suction port 2a almost uniformly.

Since the liquid material recovery apparatus 1 can be made relatively lightweight and small, it is easy to make the suction port 2a follow the water surface even when there is a wave. Furthermore, by connecting and using a plurality of liquid material recovery devices 1, a wider range of liquid materials can be recovered at a time. In addition,
It is also possible to provide the liquid material recovery device 1 with a propulsion device such as a propeller and a radio control device to be self-propelled.

(2) Recovering work at the bottom of the water When collecting sludge deposited on the bottom of the water, see FIG. 9 and lower the buoyancy by injecting water into the float tank, or use the float tank by replacing it with the weight 4 '. I do. Then, the liquid material recovery device 1 settled on the water bottom is connected to the wire 23.
To connect to the boat 20 and tow. The basic operation at the time of operation is the same as in the case of the above-mentioned water surface, and it is easy to follow the unevenness of the terrain.

Further, as described with reference to FIGS. 5 and 6, by using the fountain means 10 and the scraping means 11 together, fine sedimentation sediments typified by sludge on the bottom of the sea, rivers and lakes can be removed. Since it can be disturbed in the vicinity of the suction port 2a, dredging and recovery can be facilitated. Therefore, in this example, there is an advantage that the pollution does not diffuse to the surroundings.

As described above, the liquid material recovery device 1
Is provided with a line of suction ports 2a arranged in a straight line. By moving the linear suction line, a layered object (liquid material) such as oil floating on the water surface or sludge accumulated on the water bottom is formed. Can be efficiently inhaled. That is, there is a feature that the processing area per unit time is large and the processing efficiency is good.

Since the liquid material recovery apparatus 1 can be used on both the water surface and the water bottom, the operation rate can be increased by focusing on the water bottom dredging function, which is usually in high demand. That is, the investment efficiency of equipment is improved as compared with emergency equipment for oil spill accidents. In addition, since it can be configured to be relatively small and lightweight, it is highly adaptable to waves on the water surface and changes in the topography of the water bottom during use, and can be easily transported by land during storage standby and can be quickly moved to the work place. .

Therefore, the liquid material recovery apparatus 1 having the above-mentioned features can be used not only for recovering oil spills, but also for dredging and recovering fine sedimentation sediments typified by the bottom of the sea, rivers, lakes and marshes, factories and the like. Collection of sediment from storage tanks, maintenance and management of sedimentation filtration equipment at water purification plants, etc., collection of food residue crushed to the seabed such as underwater fisheries, maintenance and maintenance of seafloor farms, collection of fine particles on the bottom of water, etc. It can be suitably used. This device can respond immediately to an emergency such as an oil spill accident and is useful for contributing to improvement of the waterside environment.

In addition, it is needless to say that the present invention can be implemented in various modified forms based on the knowledge of those skilled in the art.

[0025]

As described above in detail, according to the liquid material recovery apparatus of the present invention, there is an effect that the liquid material spread over a wide range on the liquid surface or the liquid bottom can be efficiently recovered.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a liquid material recovery device according to an embodiment.

FIG. 2 is a front view in which a part of the liquid material recovery device is cut in a step shape.

FIG. 3 is a cross-sectional view of a suction chamber of the liquid material recovery device.

FIG. 4 is a longitudinal sectional view of a suction chamber of the liquid material recovery device.

FIG. 5 is a cross-sectional view of the liquid collecting device illustrating a fountain means.

FIG. 6 is a cross-sectional view of the liquid material recovery device illustrating a scraping means.

FIG. 7 is a cross-sectional view of a liquid material recovery device illustrating another example of a rotating body.

FIG. 8 is a diagram illustrating a use state of the liquid material recovery device.

FIG. 9 is a diagram illustrating a use state of the liquid material recovery device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid-collecting apparatus 2 Suction chamber 2a Suction port 3 Collection part 3a Tank 3b Submersible pump (discharge means) 4 Float 5 Rotating body (screw) 5c Wing part 6 Motor (drive means)

Continued on the front page (51) Int.Cl. ⁷ Identification code FI F04B 19/12 F04B 19/12 F04C 13/00 F04C 13/00 A F04D 13/08 F04D 13/08 Z 13/12 13/12 Z (58 ) Fields investigated (Int.Cl. ⁷ , DB name) C02F 1/00 C02F 1/40 C02F 11/00 E02B 15/10 F04B 19/12 F04C 13/00 F04D 13/08 F04D 13/12 E02F 3/90

Claims (3)

(57) [Claims] A suction chamber formed in a substantially cylindrical shape and having a plurality of suction ports arranged side by side in the axial direction; discharge means connected to an end of the suction chamber for discharging a liquid material in the suction chamber; A liquid material recovery apparatus comprising: a rotating body provided concentrically in a suction chamber and configured to transfer a liquid material flowing into the suction chamber in an axial direction; and a driving unit that rotationally drives the rotating body. 2. The rotating body is a screw.
The liquid material recovery device as described in the above. 3. The liquid material recovery device according to claim 2, wherein a wing portion curved in a circumferential direction is provided on an outer peripheral portion of the screw to generate a negative pressure.