WO2017094373A1

WO2017094373A1 - Floating object recovery vessel

Info

Publication number: WO2017094373A1
Application number: PCT/JP2016/080774
Authority: WO
Inventors: 雅田篭
Original assignee: 雅田篭
Priority date: 2015-11-30
Filing date: 2016-10-18
Publication date: 2017-06-08

Abstract

[Problem] To provide a device that, after taking in drifting floating objects with a cross-flow pump, efficiently recovers various floating objects using the difference in specific gravity between the floating objects and water in a floating object separation tank that is connected to the pump discharge-side flow path. [Solution] The internal structure of a floating object separation tank 90 of the present invention is such that the floating object separation tank 90 is divided by a partition plate 93 into two chambers, namely, a first chamber 95 and a second chamber 96, the bottom surface sides of which communicate to each other, an upwardly inclined first guide 67 is placed at the inflow port of the first chamber, an upwardly curved second guide 69 is placed near the lower end of the rear partition plate 93, and an upwardly inclined third guide is placed at the inflow port of the second chamber 96, the internal structure controlling the flow in the vicinity of a water surface that flows into the first chamber and enabling floating objects to be accumulated on the water surface side. The second chamber 96 recovers a floating object that the first chamber has failed to recover, and superfluous water flows out naturally through a stern release port 82. The water level balance between the inside of the floating object separation tank and the outside of the vessel is thus maintained to enable the continuous work of floating object recovery.

Description

Float collection ship

Cross reference

This application claims priority based on Japanese Patent Application No. 2015-232621 filed in Japan on November 30, 2015 and Japanese Patent Application No. 2016-097665 filed in Japan on May 16, 2016, and The contents described in both applications are incorporated herein by reference. Moreover, the content described in the patent quoted in this application, a patent application, and literature is used for this specification.

TECHNICAL FIELD The present invention relates to a device that takes in floating oil such as oil spills, water scum, and dust floating on the water surface by a floating material collecting device incorporating a suction pump, and separates and collects various drifting floating materials in a floating material separation tank. .

Conventionally, when an oil spill accident occurs in the ocean, there is a method in which an oil fence is stretched and recovered with an oil adsorbent or dispersed / decomposed with an oil treatment agent. As a spilled oil treatment device, a rotary impeller (water turbine) with its lower end submerged below the surface of the water is provided between the catamarans of the catamaran to promote the gelation of the oil substance by mixing and stirring with the gelling agent. Some devices (Patent Document 1) do, but the device is large, does not turn easily, and is difficult to reuse even if collected. Moreover, as a method for recovering a floating substance using a vacuum pump as a suction force, there is Patent Document 2, but there is a problem that the suction flow into the pump is unstable and it is difficult to take in the floating substance smoothly. Moreover, in patent document 3 and patent document 4, although a suspended | floating matter can be taken in stably with a suction pump, there exists a problem that the suspended | floating matter which is hard to collect | recover exists in a suspended | floating matter isolation | separation tank by various kinds and characteristics of a suspended | floating matter. It becomes.

JP 59-156890 A JP-A-4-266588 JP 2012-7524 A JP 2014-015793 A

In order to improve the float collection technology by the float collection ship, the flow near the surface of the intake channel that takes in the float floating on the surface of the water is controlled, the flow containing the float is taken in by the suction pump, and the pump is discharged. A technique for efficiently separating and recovering various drifting floating substances in a floating substance separation tank connected to the mouth channel is required.

FIG. 5 shows the structure of the suction side introduction passage 64 and a part of the floating substance separation tank 90 in the vicinity of the pump of the conventional floating substance collecting apparatus incorporating the drift pump 50 for taking in floating floating substances. (A) is a top view, (b) is sectional drawing. The main body of the once-through pump 50 is basically composed of a pump casing 30 containing a cylindrical multi-blade impeller 7 and a tongue 8 for controlling the flow, and is connected to the drive motor 12 by the impeller rotating shaft 2. Has been. In the introduction path for taking in drifting floating substances, the floating substance inflow guide plate 22 is installed across the flow path width below the water surface of the suction side introduction path 64 as shown in the sectional view in the vicinity of the pump in FIG. The suspended matter can be reliably taken into the impeller together with a stable suction flow on the water surface side. As shown in the pump cross-sectional view of FIG. 5B, the flow in the pump section passes through the blades 6 twice from the suction side 9 toward the discharge side 10 and toward the discharge port. The discharge flow of the once-through pump has a wide two-dimensional flow with little turbulence and is sent to the floating substance separation tank 90 connected to the pump discharge side introduction path 65.

In the floating substance separation tank 90, the floating substance is collected by utilizing the difference in specific gravity with water. Conventionally, in the floating substance separation tank 90, it is difficult to collect the floating substance because of various kinds and properties of the floating substance. There was also a problem with floating objects.

The object of the present invention is to solve the problems in the structure of such a conventional suspended matter recovery tank.

The invention described in claim 1 provides a novel suspended matter separation tank for efficiently collecting various suspended matters. This floating substance separation tank is divided into two parts by a partition plate. The upstream side is a first chamber and the downstream side is a second chamber. An opening is provided between the lower end of the partition plate and the bottom of the tank. And an opening (outlet) that leads from the bottom side outlet at the rear of the second chamber to the outside of the stern side (sea, river, lake). In the tank, suspended matter is collected on the water surface side of both chambers due to the difference in specific gravity with the water, and the excess water in the tank is allowed to flow naturally from the stern opening, and the water level between the tank and the outside of the tank The balance is maintained so that the suspended matter can be collected continuously.

A first guide or guide vane inclined slightly upward is installed at the inlet of the first chamber of the floating substance separation tank, and the water flow containing the floating substance flowing in is made to flow slightly upward toward the water surface. Floating substances are likely to float on the surface of the water, and by utilizing the specific gravity difference, floating substances (such as oil) having a specific gravity smaller than 1 are collected on the water surface side. Near the lower end of the partition plate at the rear of the first chamber, a second guide made of a curved plate curved slightly upward is installed toward the front of the first chamber, thereby flowing into the first chamber. The flow in the vicinity of the water surface including suspended matter U-turns downward on the rear wall side of the first chamber, is guided to the second guide, is reversed, and flows toward the outlet. Part of the flow becomes a circulating flow toward the water surface, making it easier to float floating objects.

Floats that could not be recovered immediately in the first chamber, such as those with specific gravity close to 1 or minute floats, that cannot be immediately lifted to the surface of the water, pass under the second guide and below the communicating partition plate. Flows into the second chamber through the opening.

According to a second aspect of the present invention, a third guide inclined upward is installed at the bottom of the inlet of the second chamber so that the flow flows slightly upward, and the flow is directed from the bottom side to the water surface side. In this way, it makes it easier for floating objects to float on the water surface. Since the flow flowing into the second chamber through the opening under the partition plate is a slow and stable flow, suspended matter having a specific gravity close to 1 is likely to rise to the surface of the water and cannot be collected in the first chamber. The suspended matter can be recovered.

By using a two-chamber structure in the floating substance separation tank as described above, the first chamber can be efficiently recovered in a state where spilled oil having a small specific gravity can be reused. The second chamber has a function of collecting various suspended matters having a specific gravity close to 1 and plastic particles that have recently become a problem in the ocean.

If the specific gravity of the suspended matter to be collected is close to 1 and difficult to collect on the water surface side, attach a suspended matter collection net to the outlet of the bottom of the second chamber and collect the suspended matter. The mesh size is selected according to the size and properties of the suspended matter to be collected. When collecting minute suspended matter, attach a filter instead of a net. If a net is not required, it may not be installed.

In the present invention, by dividing the structure in the suspended matter separation tank into two chambers, the first chamber and the second chamber, various drifting suspended matters can be efficiently collected, so that the efficiency of the collecting operation can be improved.

FIG. 1 shows the overall configuration of the suspended matter recovery ship apparatus of the present invention. (A) is a top view, (b) is sectional drawing (Example 1). FIG. 2 is an enlarged cross-sectional view of the suspended matter separation tank portion of FIG. FIG. 3 shows an overall configuration of a floating matter recovery ship apparatus different from that shown in FIG. (A) is a top view, (b) is sectional drawing (Example 2). FIG. 4 shows an example of the structure of a conventional floating object recovery ship apparatus. (A) is a top view, (b) is sectional drawing. FIG. 5 shows a part of a floating substance separation tank and an introduction path for taking in floating substances before and after the once-through pump of the floating substance recovery ship. (A) is a top view, (b) is sectional drawing.

2 impeller rotary shaft 6 cross-flow pump blade 7 impeller 8 casing tongue 9 pump suction side 10 pump discharge side 11 air pump 11b liquid pump 12 drive motor 13 supply hose 14 water surface 22 floating material introduction guide plate 30

pump casing

40, 41 Float recovery ship 45 Float recovery ship (conventional type)
50 Cross-flow pump 58 Ship 59 Sluice 60 Opening and closing type inflow guide 63 Bar screen 64 Suction side introduction path 65 Discharge side introduction path 67 First guide 68 Horizontal introduction guide 69 Second guide 70 Floating substance separation guide 71 Floating substance collection introduction pipe 72

Valves

73 and 74 Floating substance recovery container 78 Tank rear wall side outlet 80 Second chamber rear wall side outlet 81 Second chamber bottom side outlet 82 Stern opening (outlet)
83 Ship bottom opening (outlet)
85, 86 Floating substance collection network or filter 87

Third guide

90, 91 Floating substance separation tank 92 Floating substance separation tank (conventional type)
93 Partition plate 95 First chamber 96 Second chamber 98 Screw F Floating substance h Opening height between lower end of partition plate and bottom of floating substance separation tank

Hereinafter, embodiments of the present invention will be described with reference to FIGS.

FIG. 1 is a first embodiment relating to the invention described in claim 1 and claim 2 and shows the entire structure of a floating substance recovery ship 40 incorporating a new floating substance separation tank 90. FIG. 4A is a plan view, and FIG. FIG. 2 is an enlarged view showing the internal structure of the suspended matter separation tank 90. The structure of the suspended matter recovery ship 40 is a cylindrical multi-blade once-through pump 50, and the suction side includes a wide suction-side introduction passage 64 that roughly matches the side wall width of the once-through pump. The floating inflow guide plate 22 is installed below the water surface of the inlet / outlet guide 60 and the introduction path 64 just before the pump at the water intake, and the floating side of the drift taken in with the water is separated and recovered on the pump discharge side. This is a configuration in which a suspended matter separation tank 90 is connected to a discharge side introduction path 65 having substantially the same width as the suction side introduction path.

The floating substance separation tank 90 is divided into two parts by a partition plate 93. The upstream side is a first chamber 95 and the downstream side is a second chamber 96. A predetermined opening is provided between the lower end of the partition plate 93 and the tank bottom surface. The first chamber 95 and the second chamber 96 are in communication with each other, and the flow in the suspended matter separation tank passes from the first chamber 95 through the opening h, It is configured to flow into the chamber 96. In the first chamber, a first guide 67 inclined slightly upward at the inlet portion, and a second guide curved slightly upward toward the front portion of the first chamber near the lower end of the rear partition plate 93. 69 is installed, and a third guide 87 inclined upward is installed at the bottom of the second chamber inlet.

According to this embodiment, floating substances drifting in the vicinity of the water surface are taken into the suction once-through pump 50 together with water from the intake port of the bow through the suction side introduction path 64. The discharge flow of the once-through pump has a wide and less turbulent flow characteristic, and water and suspended matter are fed into the suspended matter separation tank 90 without becoming turbid. The flow that includes the floating material that has been sent flows in as a slightly upward flow due to the first guide 67 installed at the inlet of the first chamber. As a result, suspended matter (oil, etc.) having a specific gravity smaller than 1 is collected on the water surface side.

As shown in the enlarged view of FIG. 2, the flow in the vicinity of the water surface including suspended matter flowing into the first chamber makes a U-turn downward on the rear wall side of the first chamber, is guided to the second guide 69, and goes to the outlet. Since a part of the flow forms a circulating flow toward the water surface side, the suspended matter easily floats, and the suspended matter is collected on the water surface side. The flow including the remaining suspended matter that could not rise to the water surface side in the first chamber passes under the second guide 69, goes to the second chamber 96 through the communicating opening h, and is collected in the first chamber 95. The suspended matter that could not be removed is collected in the second chamber 96.

Since the flow flowing into the second chamber through the opening h at the bottom of the partition plate 93 is a slow and stable flow, suspended matter having a specific gravity close to 1 easily floats on the water surface side and is easy to collect. A third guide 87 is installed at the bottom of the second chamber inlet so that the inflow flows upward from the bottom surface toward the water surface. As a result, the suspended matter easily floats on the water surface. Floating substances such as oil collected on the water surface side are collected in floating

substance collection containers

73 and 74 through the floating substance collection introduction pipe 71. The position in the height direction of the suspended matter separation guide 69 should be adjusted according to the type and properties of the suspended matter.

The excess water after separating from the floating substance in the floating substance separation tank naturally flows out from the outflow port 80 at the bottom of the second chamber to the outside of the ship (sea, river, lake) through the stern opening 82 to separate the floating substance. The water level balance between the tank and the outside of the tank is maintained. Thereby, floating substance collection operation can be performed continuously. When the suspended matter that could not be collected on the water surface side of both chambers is also collected, the suspended matter collection net or filter 85 is attached to the second chamber outlet 80 and collected. In this embodiment, since the outlet is on the stern side, it contributes slightly to the propulsion of the ship.

As a means for promoting water purification and floating floating, the impeller rotating shaft 2 shown in FIG. 5 is a diffused hole hollow rotating shaft having a number of small holes, and the air pump 11 shown in FIG. Gas is supplied into the diffuser hole hollow rotary shaft through the supply hose 13 connected to the hermetic bracket, and is blown into the rotating impeller as finer bubbles than the diffuser hole. The fine bubbles are supplied with the discharge flow of the pump from the inside to the outside of the impeller 7 in a state where the fine bubbles are uniformly mixed. By the flow accompanied with the bubbles, the floating substance can be promoted in the first chamber and can be easily recovered. It also contributes to water purification by fine bubbles.

In the case of processing a toxic liquid that cannot be recovered from the suspended matter that has flowed out, a treatment liquid for making the harmful suspended matter (liquid) harmless by the liquid pump 11b shown in FIG. It is made harmless by supplying it into the hollow rotating shaft of the air diffuser hole of the impeller, spraying the processing liquid atomized from the air diffuser hole into the impeller while rotating, and evenly mixing it with the harmful liquid taken in. be able to.

FIG. 3 shows the form of the suspended matter recovery ship 41 in the second embodiment. FIG. 1A is a plan view, and FIG. Unlike the first embodiment of FIG. 1, the present floating substance recovery ship has a structure in which an outlet 81 that leads to a ship bottom opening 83 is provided on the bottom side of the second chamber of the floating substance separation tank. Other configurations and floating substance collection functions are the same as those of the first embodiment shown in FIG.

FIG. 4 shows an example of the device configuration of a conventional suspended matter collection ship 45. In this example, the floating substance separation tank is a single chamber. Drifting floating substance taken in by the pump flows into the floating substance separation tank 92 connected to the pump discharge port. In the floating substance separation tank, the floating substance gathers on the water surface side due to the difference in specific gravity, and excess water is collected in the tank. The water naturally flows out from the bottom rear wall side outlet 78 to the outside through the stern opening 82, and the water level balance in the suspended matter separation tank 92 is maintained.

In the configuration having this shape, those having specific gravity smaller than 1 such as crude oil are floated and collected on the water surface side of the floating substance separation tank 92, but the specific gravity is very small such as suspended matter and plastic particles. Since the floating speed is low, the floating speed rides on the circulating flow in the separation tank and is discharged from the rear outlet 78 of the separation tank to the outside of the ship, which is effective for various floating substances. May not be recovered. Even in the case of a crude oil spill, as time passes, the properties of the crude oil change as it mixes with seawater, and the specific gravity may be close to 1, resulting in a problem that the recovery efficiency of suspended solids is reduced.

In addition, in the horizontal introduction guide 68 installed at the inlet of the floating substance separation tank 92, the inflow direction at the tank inlet is horizontal, but the effect of floating the floating substance in the horizontal flow is Inferior. As shown in the first embodiment of the present invention in FIG. 1, if the first guide 67 inclined slightly upward is installed and the inflow direction is slightly upward, the floating substance is likely to float.

The suspended matter recovery ship of the present invention takes in a flow containing suspended matter by a once-through pump and then sends it to a suspended matter separation tank connected to a discharge side flow path. The floating separation tank is divided into two chambers, a first chamber and a second chamber, by a partition plate with the bottom of the tank in communication. It can be efficiently collected in the chamber. In addition, it has excellent functions such as direct recovery and reuse of spilled oil.

Claims

A cross-flow pump having a cylindrical and multi-blade impeller is installed in the flow path width direction in the middle of the introduction path where the flow path width from the intake port to the suspended matter separation tank is substantially constant, and the discharge of the cross-flow pump In the suspended matter recovery ship incorporating the suspended matter recovery device configured to connect the suspended matter separation tank to the side introduction path,
The internal structure of the floating substance separation tank is divided into two chambers, a first chamber on the upstream side and a second chamber on the downstream side by a partition plate, and a communication having an opening between the lower end of the partition plate and the tank bottom surface. And having an outflow opening that leads from the rear wall side outlet at the bottom of the second chamber to the outside at the bottom of the stern, and a first guide inclined upward is installed at the inlet of the first chamber, A float collection ship, wherein a second guide curved upward toward the front of the first chamber is installed near the lower end of the partition plate at the rear of the first chamber.
A third guide inclined upward is provided at the bottom of the inlet of the second chamber of the floating substance separation tank, and the flow from the bottom to the water surface is obtained with the inflow to the second chamber facing upward. The suspended matter collection ship according to claim 1.