WO2009136727A2

WO2009136727A2 - Marine sediment removal system for vessels to prevent red tide

Info

Publication number: WO2009136727A2
Application number: PCT/KR2009/002370
Authority: WO
Inventors: 정한식; 정효민; 이경환
Original assignee: 경상대학교 산학협력단
Priority date: 2008-05-06
Filing date: 2009-05-06
Publication date: 2009-11-12
Also published as: KR20090116213A; KR100968503B1; WO2009136727A3

Abstract

The present invention relates to a marine sediment removal system for vessels to prevent red tide, the system comprising: an ejector which is installed in a vessel and includes a nozzle for directly receiving cooling water for the ship's engine or seawater for a fresh water generator, and for injecting the water as a working fluid at a high speed; a suction chamber which enters a vacuum state as the working fluid is injected therein at a high speed via an outlet of the nozzle facing towards the chamber; and a diffuser which is located on the same axis as the nozzle to change a low-pressure fluid to a high-speed fluid; a flexible suction pipe where vacuum-induced suction takes place as the working fluid is injected; a suction pipe installed in communication with a lower part of the suction chamber of the ejector; a cover which is attached to an end of the suction pipe to provide a shielding effect when coming in contact with the seabed; a cyclone to which sucked material from the ejector is delivered to undergo solid-liquid separation; a collecting tank in which solid components separated from the cyclone are collected; and a delivery pipe used for delivering liquid components separated from the cyclone.

Description

Ship-mounted submarine sediment removal system for red tide prevention

The present invention relates to a ship-mounted subsea sediment removal system for red tide prevention, and more particularly, to suction the loess and sediment accumulated in the sea floor by the suction pressure of the ejector installed in the vessel, the inhaled loess and sediment is in the cyclone By solid-liquid separation and solid components are collected in the vessel, the liquid sea water to be discharged, while minimizing additional installation costs, such as using the engine cooling water or the vacuum drive of the water tank as the working fluid of the ejector The present invention relates to a ship-mounted undersea sediment removal system for red tide prevention that suppresses the occurrence of red tide by removing the sea sediment that causes red tide.

Red tide is a phenomenon in which the plankton multiplies in a huge number and changes the color of the sea, rivers, canals and lakes, and the changing color may be orange, reddish brown or brown depending on the cause of the plankton. The plankton causing the red tide is most commonly phytoplankton such as diatoms and flagella algae dinoflagellates. Red tide may occur.

The biggest cause of red tide is the eutrophication of water, ie when there is too much organic nutrients in the water. In the past, phosphorus in soaps and detergents has been a problem, but recently, due to coastal development, the decrease in tidal flats has made it difficult to maintain the proper level of microorganisms and plankton in water through various living organisms in the tidal flats, which gradually increased eutrophication. It is estimated to occur more frequently.

Once the red tide occurs, the dissolved oxygen concentration in the water is lowered, so the fish and shellfish that breathe using oxygen in the water suffocate and die or die by toxic algae. Therefore, when red tide occurs, not only can damage the fishery, especially aquaculture, but also may cause symptoms of poisoning by human ingestion of fish and shellfish accumulating toxic substances.

In particular, in Korea, red tide occurs frequently in summer, causing massive red tide damages in excess of 10 billion won in the southern coastal fish farms.

The method of removing red tide that has been carried out so far is to spray copper sulfate, but it does not have a great effect. The method of spraying ocher prevents the spread to some extent, but it is temporary. Therefore, to prevent red tide damage, Eutrophication should be restrained and other methods of maintaining tidal flats should be performed in parallel.

In addition, the ocher layer is formed on the sea bottom due to the yellow soil that has been sprayed for red tide removal, which causes secondary pollution, such as the inflow of the reefs of fish and wastes inhabiting the sea bottom, causing death. Therefore, there is a need to provide a device for removing the seabed sediment deposited by organic nutrients, which is the cause of the large breeding of Planck barrels.

Korean Patent Registration No. 0336453 (registered on Apr. 30, 2002) presents the system installed with the bottom sediment removal device on barges in the water quality of lakes, reservoirs, dams and the bottom sediment removal system of rivers. The system places the blocking case on the floor and discharges the pressurized water through the internal pressurized water supply pipe so that the sediment is suspended. At this time, the suspended turbid water is sucked through the pressurized water supply pipe and a separate suction pipe and transported to the upper barge. In the upper part of the barge, dehydration is carried out to separate the sludge and the stripping filtrate, and the stripping filtrate is configured to be discharged through a treatment tank having activated carbon. The structure has an excellent effect on improving the water quality by absorbing the bottom sediment and re-export only pure water.

However, the system must be provided with a separate pumping device for supplying pressurized water or to suck up suspended turbid water by pressurization, and because the system is equipped with various treatments for influent, the installation weight of the system is large, which limits the throughput of the sediment. Therefore, there is a need to provide a system having an improved structure in order to treat a large seabed sediment.

Ship-mounted submarine deposit removal system for red tide prevention of the present invention for solving the above problems,

A suction chamber installed in the ship and directly receiving the cooling water of the ship engine or the seawater of the water tank as a working fluid and spraying it as a working fluid; and a suction chamber in which a discharge port of the nozzle is positioned to perform vacuum during the high speed spraying of the working fluid; An ejector disposed on the same axis as the nozzle and configured to diffuse the low pressure fluid into a high pressure discharge; A flexible suction tube communicating with the suction chamber below the ejector and suctioned by a vacuum generated by movement of the working fluid; A cyclone that receives the suction discharged from the ejector and performs solid-liquid separation; A collecting tank for collecting the solid component separated from the cyclone; And a discharge pipe for discharging the liquid component separated from the cyclone.

In addition, the suction pipe may be further provided with a filter for filtering a solid component of a size larger than the minimum nozzle diameter of the ejector, and further includes a cover which is attached to the end of the suction pipe and is shielded in contact with the seabed, The cover may be further installed with an underwater camera to check the state of the shielded space with the seabed.

As described in detail above, the ship-mounted submarine deposit removal system for red tide prevention of the present invention,

The suction pressure of the ejector installed on the vessel sucks the yellow soil and the sediment accumulated in the sea bed, and the sucked yellow soil and the sediment are solid-liquid separated by a cyclone so that the solid component is collected in the vessel and the liquid sea water is discharged. The working fluid of the ejector can be minimized by the additional installation cost, such as using engine coolant or seawater for the vacuum drive of the water heater.

The simple structure and the small volume ejector make maximum use of the limited shipping space to remove more seabed sediment, thereby controlling the amount of organic nutrients and damaging the seabed caused by the deposited loess. It is possible to provide a useful device for improving the water quality, such as to prevent the occurrence of red tide.

1 is a schematic diagram of a seabed sediment removal system according to the present invention.

2 is a cross-sectional view of an ejector according to the present invention.

3 is a cross-sectional view showing a state in which a filter is interposed between the cover and the suction pipe according to the present invention.

Figure 4 is a cross-sectional view showing a state in which the side surface of the cover according to the invention is rotated by a hinge.

5 and 6 are schematic views showing a state in which the underwater camera is installed on the cover according to the present invention.

Figure 7 is a schematic diagram showing a seabed sediment removal system equipped with a lifting device according to the present invention.

10: Ship mounted seabed sediment removal system

11: cyclone 12: collecting tank

13: discharge pipe 14: engine

15: water dispenser 20: ejector

21: nozzle 22: suction chamber

23: diffuser 24: outlet

211: inlet 212: nozzle outlet

221: suction port 30: suction pipe

40: cover 41: hinge

42: filter 43: underwater camera

44: protective case 50: ship

60: lifting device 61: winding machine

62: wire

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1, the ship-mounted submarine sediment removal system 10 according to the present invention is installed in the ship 50 to control the coolant control of the ship engine 14 and the vacuum evaporation chamber state of the water dispenser 15. The ejector 20 sucks sediments of the seabed through the suction force of the ejector and solid-liquidly separates them into the cyclone 11, and collects the solid deposits including the loess into the collecting tank 12, and the seawater is configured to be re-extracted. do.

Here, the ejector 20 uses an ejector for circulating cooling water of a ship engine, an ejector for forming a vacuum of an evaporator chamber of a ship water dispenser, or installs an ejector separately so that only the working fluid is a ship engine or a water dispenser. It can be supplied from and used. As shown in FIG. 2, the ejector 20 includes a nozzle 21 having a nozzle outlet 212 formed on a suction chamber 22 having a suction inlet 221 downward, and a diffuser installed on the same axis as the nozzle outlet. 23). The ejector 20 of the above-described configuration uses the marine engine 14 cooling water or the vacuum driving seawater in the water pump 15 as a working fluid. That is, without using a separate pumping means for driving the working fluid, the cooling water discharged by the engine cooling water circulation pump is directly supplied as a working fluid of the ejector, or by using the storage seawater discharged to evacuate the evaporator chamber of the water tank. It is to drive the ejector without extra power.

At this time, when the ejector 20 is used as an ejector mounted on the water tank of the ship 50, the installation cost can be reduced. That is, the water tank is provided with an evaporation chamber supporting sea water, and an ejector is used as a means for forming the evaporation chamber in a vacuum state. Thus, by replacing the pipe connected to the suction chamber lower suction port of the installed ejector to communicate with the evaporation chamber by replacing the suction pipe connected to the cover that is introduced into the seabed, it is possible to perform the operation of removing the seabed sediment without installing additional ejectors. In addition, the ejector may be used as an ejector for cooling water circulation of a marine engine, but in order to reduce the installation weight of the system, the ejector 20 installed in the water tank of the marine vessel is used as a pumping means, and the cooling fluid of the marine engine as its working fluid. Is to use

The working fluid thus delivered is supplied to the nozzle 21 through the inlet 211, and the supplied working fluid is discharged at a high speed through the nozzle to form a vacuum pressure in the suction chamber 22. By the vacuum pressure, the suction chamber 22 tries to achieve pressure balance by sucking the surroundings which are relatively high pressure. In this process, the suction force is transferred to the suction port 221 formed under the suction chamber, and the fluid or gas is supplied through the suction port. Inhalation is made. The suctioned fluid and the working fluid through the nozzle are mixed while passing through the diffuser 23, and the pressure is increased to be discharged to the final outlet 24.

The suction pipe 30 is coupled to the suction port 221 of the ejector 20 operated as described above. The suction pipe and the ejector suction port are preferably firmly coupled to the flange, and a packing may be further inserted into the coupling part to prevent the pressure from being counted. In addition, the suction pipe 30 is located on the bottom of the other end of the end coupled to the ejector to suck the seabed sediment including the ocher layer and the organic material layer formed on the bottom by vacuum suction input.

The cover 40 is installed at the end of the suction pipe 30 so that the suction pressure is concentrated on a portion of the sea bottom during suction. The cover is preferably formed in a box or dome shape in which a receiving space is formed therein, and as shown in FIG. 3, a lower portion in contact with the sea bottom is formed in a wider surface than the top of the cover, thereby stably seating the cover on the sea bottom. It is desirable to.

In addition, the cover 40 may be formed to be different from the angle formed by the upper surface and the side of the cover according to the bottom seam by allowing the rotation of the side by a predetermined angle as shown in FIG. In this case, the side rotated by the hinge may have a gap between the adjacent sides, so that a gap may be generated. Therefore, it is preferable that the side is connected to each other by a material having excellent elasticity such as rubber so that the inner accommodation space is well sealed. Do.

In addition, a filter 42 may be installed at a connection portion or one side of the suction pipe 30 and the cover 40 to prevent a relatively large agglomerate material from being sucked up. For example, when a lump larger than the smallest diameter among the flow paths of the diffuser 23 is sucked in, the flow path is blocked, so that smooth operation is difficult. Therefore, the diameter of the filter 42 is diffuser 23. It is preferable to form smaller than the smallest diameter of the flow path to perform the filtering.

Next, as shown in FIG. 5, an underwater camera 43 is further installed inside the cover 40 to check the bottom mounting state of the cover so that the cover is re-seated so as to be well sealed, or whether the soil layer or organic matter is deposited. You can check and set the seating position. When the underwater camera 43 is directly installed in the cover 40, it may be directly hit and damaged by the seabed structure, as shown in Figure 6 is provided with a protective case 44 in the cover 40, using a transparent window, etc. It is preferable to ensure the field of view of the underwater camera 43.

In addition, the cover 40 is further equipped with a lifting device 60 to facilitate the removal of the seabed sediment. The elevating device may be applied to various methods, but typically, as shown in FIG. 7, a winder 61 that rotates with the power of a motor is installed on the ship 50, and an end of the wire 62 wound around the winder. Is connected to the cover 40 can be made to lift the cover in accordance with the degree of winding of the wire. At this time, the suction pipe 30 connecting the cover 40 and the ship 50 is preferably formed in a flexible structure to form a flexible.

As described above, the seabed sediment containing the ocher layer is sealed by the cover 40 and sucked by the suction force of the suction pipe 30. The suction fluid including the sea deposit is introduced into the suction chamber 22 of the ejector 20 and mixed with the working fluid injected through the nozzle 21 to pass through the diffuser 23 of the ejector.

At this time, the diffuser 23 is formed of a structure in which the inlet portion is gradually reduced in diameter and the outlet portion is gradually enlarged in diameter, so that the suction fluid and the working fluid including the sea sediment are mixed and discharged from the inlet portion of the diffuser. The pressure is gradually raised to compensate.

The mixed fluid discharged to the discharge port 24 of the ejector is supplied to the cyclone 11 to perform solid-liquid separation. The solid component, which is a seabed sediment containing ocher separated from the cyclone, is collected in a collecting tank 12 provided in the vessel, and the separated liquid component is discharged out of the vessel through the discharge pipe 13.

In addition, the above-mentioned example is only an example to demonstrate this invention. Therefore, it is obvious that the ordinary skilled in the art to which the present invention pertains uses the partial change with reference to the detailed description.

Claims

In the ship-mounted submarine sediment removal system that inhales and sediments and collects the sea sediment, thereby reducing the content of organic nutrients to prevent the occurrence of red tide.

A suction chamber installed in the ship and directly receiving the cooling water of the ship engine or the seawater of the water tank as a working fluid and spraying it as a working fluid; and a suction chamber in which a discharge port of the nozzle is positioned to perform vacuum during the high speed spraying of the working fluid; An ejector disposed on the same axis as the nozzle and configured to diffuse the low pressure fluid into a high pressure discharge;

A suction pipe communicating with the suction chamber under the ejector, the suction pipe being sucked by the vacuum generated by the movement of the working fluid;

A cyclone that receives the suction discharged from the ejector and performs solid-liquid separation;

A collecting tank for collecting the solid component separated from the cyclone;

Ship-mounted submarine deposit removal system for red tide prevention, characterized in that it comprises a; discharge pipe for discharging the liquid component separated from the cyclone.
The method according to claim 1,

And a filter for filtering solid components having a size larger than the minimum flow path diameter of the ejector in the suction pipe.
The method according to claim 1,

And a cover mounted on an end of the suction pipe and formed in a box shape in which a receiving space is formed so as to be in contact with the sea bottom to shield the sea bottom.
The method according to claim 3,

The cover is a marine-mounted submarine deposit removal system for red tide prevention, characterized in that the cover is further installed to check the state of the shielded space with the seabed.
The method according to claim 4,

The cover is a ship-mounted submarine deposit removal system for red tide prevention to the side is formed to be rotatable by the hinge to form a different angle formed between the top surface and the side surface according to the seabed terrain.
The method according to claim 3,

The vessel-mounted submarine sediment removal system for red tide prevention, characterized in that the vessel is further provided with a lifting device for elevating the cover.
The method according to claim 7,

The lifting device comprises a winding machine that is rotated by the power of the motor, the wire is coupled to the winding machine and the other end is connected to the upper end of the cover to prevent the rising and falling of the cover according to the winding degree Ship-mounted seabed sediment removal system.