KR20140040396A - Marine structure having gravity type apparatus for treating ballast water - Google Patents

Abstract

The present invention relates to an offshore structure having a gravity type ballast water treatment system. To be more particular, an offshore structure having a ballast water treatment system, which can minimize the inflow of foreign marine life through ballast water, can contribute to the conservation of the marine ecosystem and the prevention of marine contamination, can satisfy the standards of an IMO international agreement, can make an additional transfer pump unnecessary by placing a ballast water treatment system in the upper part of a column or the upper part of the surface of seawater in order to transmit treatment water passing a treatment process to a ballast tank by gravity, and can make an additional discharge pump unnecessary by discharging the treatment water to the outside of a ship as deballast water. The ballast water treatment system installed in an offshore structure comprises: a ballast water treatment unit (111) which is installed in the upper part of the column (120) placed in the offshore structure (100); and a ballast line (112) which supplies ballast water to the ballast water treatment unit (111) and transfers the treatment water to the lower part by gravity after the treatment. [Reference numerals] (111) Ballast water treatment unit; (113) Ballast pump; (130) Ballast tank; (140) Seawater inlet

Description

Marine Structure with Gravity Ballast Water Treatment System {MARINE STRUCTURE HAVING GRAVITY TYPE APPARATUS FOR TREATING BALLAST WATER}

The present invention relates to an offshore structure having a gravity ballast water treatment apparatus, and more specifically, to minimize the inflow of foreign marine species through the ballast water to meet the international convention of the IMO, and the treated water by gravity An offshore structure having a gravity ballast water treatment system configured to be transported so that no separate pump is required.

Several ship types, including crude oil carriers, container ships, and drilling ships, are equipped with ballast tanks filled with ballast water to adjust drafts and trips. These ballast tanks function to maintain the balance and stability of the hull, and to stabilize the hull by adjusting the buoyancy of the hull through the filling or discharging of ballast water according to the cargo or load quantity. In this case, the propulsion and the rudder simultaneously perform an auxiliary function for effectively operating underwater.

The ballast water is filled in the ballast tanks before leaving the loading port and discharged from the ballast tanks before entering the loading port or loading cargo. Therefore, the ballast water is continuously injected and discharged in the process of loading and discharging cargo on the ship, and moves with the ship. In addition, the ballast water is supplied to the ballast tank, which is supplied through the seawater inlet by a ballast pump or the like to form a closed compartment inside the vessel.

Ballast water contains a variety of microorganisms such as plankton, bacteria, and aquatic organisms that live in the water supply area, and when the ballast water is discharged to coasts and ports near loading ports, it disrupts the ecosystem of surrounding waters. In addition, since the ballast water is kept closed and lightless for a long period of time, the amount of dissolved oxygen is lowered, and the discharge of the ballast water in the empty oxygen state adversely affects the living organisms in the surrounding sea area. . Therefore, if ballast water is discharged to foreign ports, etc., and acts as a passage for unwanted harmful aquatic organisms, it not only destroys the existing indigenous marine ecosystems, but also threatens health due to influx of pathogens and toxic organisms. Costly treatment of exotic species.

As the damage caused by the ballast water of such ships spreads, the International Maritime Organization (hereinafter referred to as 'IMO'), which recognized the seriousness, adopted the International Convention on Ship Ballast Water and Sediment Management. The Ballast Water Exchange Standard is applied, and from 2012, mandatory installation of ballast water treatment systems (BWTS) in offshore floating vessels such as Floating Production Storage and Offloading (FPSO), 2017 Thereafter, all vessels will be required to install a device that satisfies the IMO's ballast water treatment standards.

As a method of reducing the inflow of foreign marine species introduced through such ballast water, there is a method of exchanging ballast water at sea before entering a specific port. This method is highly applicable because it can simplify the ballast system because only the inflow and outflow of seawater for ballast water exchange is provided. However, since this method is carried out in the sea area of the exchange place far from the land, coarse waves exist and the water pressure of sea water is higher than that of the land coast, which causes the longitudinal bending moment of the ship to increase during the inboard movement of ballast water. do. As a result, the hull deformation occurs, the hull attitude unrest, etc. in the ballast water exchange process is a problem that it is difficult to secure the safety of the ship.

Other methods include installing and operating ballast water reception facilities and treatment facilities offshore or on land. This method does not need to install a separate treatment device on the ship, so the maintenance and risk of the ship is low, the method recently received attention, the cost and complaints associated with the installation and operation of a large capacity facility may occur, which is still useful The device is insufficient. Another method is to install a ballast water treatment system on a ship. The IMO Convention mandates the installation of such treatment facilities. However, it is expensive to install the ballast water treatment device, and may cause loss of space for installation, weight control, and power consumption.

Such ballast water treatment system is mandatory to be installed in all ship types when IMO's International Convention on Vessel Ballast Water and Sediment Management comes into effect, and existing league vessels are not required to apply such ballast water treatment system. Introduction was necessary. However, when the ballast water treatment system is introduced to the league ship, not only the existing ballast system has to be greatly changed, but also many additional equipment including a separate pump and the like are required.

The present invention is to solve the conventional problems as described above, to minimize the influx of foreign marine species through the ballast water of the offshore structure to contribute to the conservation of marine ecosystems and prevention of marine pollution, It ensures that the international conventions are met and that back flushing water as well as treated water that has been treated with ballast water is transported using gravity, which eliminates the need for a separate pump and prevents clogging. The purpose is to make it possible.

According to an aspect of the present invention for achieving the above object, as a marine structure having a ballast tank and a ballast water treatment apparatus in the hull, the ballast water treatment apparatus is installed on the top of the column provided in the offshore structure ballast water A ballast water treatment unit for processing the; A ballast line configured to supply ballast water to the ballast water treatment unit and to transfer the treated water to the lower side by gravity; There is provided a marine structure comprising a.

The ballast water treatment unit is preferably installed higher than the ballast tank receiving the treated water through the ballast line used as ballast water.

The ballast water treatment unit, it is preferable to store the active material capable of killing aquatic organisms contained in the ballast water to inject the active material into the ballast line.

Preferably, the ballast water treatment unit includes a manifold formed in the form of an active material storage container and installed to receive the active material from the outside.

The ballast line is preferably made of a reinfored glass fiber material.

The marine structure further includes a ballast pump for pumping seawater to be used as ballast water from the seawater inlet of the rig ship to be supplied to the ballast water treatment unit through the ballast line, wherein the ballast water treatment unit, the seawater It is preferable to treat the gas before it is divided into each of the ballast tanks.

Preferably, the offshore structure further includes a redundancy line connecting each other between ballast lines connected to each of the ballast pumps.

Preferably, the redundancy line connects the ballast line to each other at the rear end of the seawater inlet and the rear end of the ballast pump.

According to another aspect of the present invention, a method for treating ballast water in an offshore structure having a ballast tank and a ballast water treatment apparatus in the hull, the ballast water in the ballast water treatment apparatus installed above the ballast tank in the offshore structure The ballast water treatment method is provided by supplying and treating and conveying the treated water which has been processed downward by gravity.

According to the present invention, it is possible to minimize the inflow of foreign marine species through the ballast water of the offshore structure, thereby contributing to the preservation of the marine ecosystem and the prevention of marine pollution, and at the same time satisfying the international convention standards of the IMO.

In addition, according to the present invention, the ballast water treatment device is disposed on the upper portion of the column above the sea level to ensure that the treated water is delivered to the ballast tank by gravity to eliminate the need for a separate transfer pump, and the treated water as deballast water. It can be discharged outboard, so that a separate discharge pump is unnecessary.

Further, according to the present invention, since the back flushing water of the ballast water treatment device filter can be discharged to the outboard by gravity, a separate pump for back flushing is unnecessary, and foreign matter present in the back flushing water is gravity. It can be discharged to prevent clogging.

1 is a block diagram showing a gravity ballast water treatment apparatus according to an embodiment of the present invention.
Figure 2 is a side view schematically showing an offshore structure, such as a rig, having a gravity ballast water treatment apparatus according to an embodiment of the present invention.
Figure 3 is a schematic diagram showing a ballast system of the offshore structure, such as a rig ship having a gravity ballast water treatment apparatus according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the following examples can be modified in various forms, and the scope of the present invention is not limited to the following examples.

1 is a configuration diagram showing a gravity ballast water treatment apparatus according to an embodiment of the present invention, Figure 2 is a side view schematically showing a marine structure having a gravity ballast water treatment apparatus according to an embodiment of the present invention. . Hereinafter, the ballast water treatment apparatus of the present invention is described as an example installed in a semi-submersible rig ship, but the ballast water treatment apparatus of the present invention, in addition to the rig ship, floating marine structures such as FPSO, FSRU, cargo ship, Of course, it can be installed in vessels such as oil tankers, LNG carriers. As such, the concept includes all floating marine structures and ships used while floating in the sea, and the term marine structure is used herein.

1 and 2, the gravity ballast water treatment apparatus 110 according to an embodiment of the present invention is installed on the top of the column 120 provided in the offshore structure, for example, the rig ship 100 to supply the ballast water In order to receive and process the treatment, the treated water to be transported downward by gravity, for this purpose, for example, may include a ballast water treatment unit 111 and the ballast line 112. Here, the object may include back flushing water in addition to the treated water to be transported downward by gravity.

The ballast water treatment unit 111 is installed on an upper portion of the column 120 provided in the floating offshore structure 100 to treat the ballast water, and receives the treated water through the ballast line 112 as in this embodiment. It can be installed higher than the ballast tank 130 used as the ballast water. Therefore, the ballast water treatment unit 111 can be smoothly transported downward by gravity by the pressure head at the position where the treated water is finished by the ballast water treatment, so that the treated water along the ballast line 112, the ballast tank ( 130, or to be easily discharged to the outside.

Ballast water includes sediments, mud, plankton-scale organisms, micro-organisms, etc., the ballast water treatment unit 111 may be the core of the microorganisms, such as plankton, sterilization treatment, solids, mud, etc. The efficiency of ballast water treatment is greatly reduced by the mixing of large or non-living organisms. Therefore, the filtration pretreatment system for the removal of large foreign substances or the removal of aggregates, sediments and sludge from the ballast water. Additional equipment, such as hydrocyclones, may be included, and unlike general vessels, it may not always be used.

The ballast water treatment unit 111 may include, for example, a waste heat recovery treatment apparatus and a heat exchanger to sterilize by recovering waste heat of combustion gas generated from a main engine and heating the ballast water. As another example, a ballast The ballast water can be injected with an active substance that can kill aquatic organisms contained in the water, or as another physical treatment method, the ballast water can be sterilized by using electric heater heating, ultraviolet irradiation, and ultrasonic waves. You can do that.

Referring to FIG. 3, the ballast water treatment unit 111 stores an active material capable of killing aquatic organisms contained in the ballast water through an active material discharge line 111a, for example, by a chemical treatment method. The active material can be injected into the ballast line 112, and for this purpose, the active material can be formed in the form of a storage container such as a container or a tank, and a cover or an inlet for opening and closing the inside to fill the active material As in this embodiment, a manifold 111b for receiving an active material from the outside may be installed. On the other hand, when the manifold (111b) is installed in the ballast water treatment unit 111, the active material can be supplied through a barge, etc. For this purpose, connecting the barge and the manifold (111b) with a hose, the operation of the pump By this, the active substance can be easily supplied from a barge or the like.

Active material discharge line (111a) for discharging the active material of the active material storage container may be installed in the lower portion of the ballast water treatment unit 111, which is the maximum discharge to the active material discharged to the active material discharge line (111a) Allow pressure to be applied.

Active substances are chemicals that can kill various microorganisms and shellfish aquatic organisms contained in ballast water, such as chlorine disinfectants, chlorine dioxide, acetic acid peroxide, ozone, peraclean (manufactured by Degussa AG, Germany), etc. It can be used, because the amount of the active material is determined in proportion to the amount of treatment of the ballast water, the storage capacity of the active material in the ballast water treatment unit 111 is determined by the amount of active material used for the amount of ballast water recommended by the manufacturer of the active material. For example, it can be designed to store two times the amount of use in consideration of an emergency, without the need to store a large amount of the active material unnecessarily. On the other hand, the active material may be injected into the drainage line used when the ballast water is discharged to the outside from each ballast tank 130, but if the ballast water to be discharged to the outside of the hull by chemical treatment, the chemical treatment is discharged Secondary pollution of the ocean may occur due to the ballast water.

The ballast line 112 may be made of a variety of materials for supplying the ballast water to the ballast water treatment unit 111, the treated water after the treatment is transported downward by gravity, and to prevent corrosion by the active material and seawater. And, for example, by being made of a reinforced glass fiber (reinfored glass fiber) material can be prevented as much as possible.

The ballast pump 113 may be installed in the ballast line 112. Here, the ballast pump 113 may be installed in a pontoon (150) of the rig ship 100, for example, seawater for being used as ballast water from the seawater inlet 140 of the floating offshore structure 100 Pumped to be supplied to the ballast water treatment unit 111 through the ballast line 112, it may be made of a single, or made of a plurality.

The ballast water treatment unit 111 may process this seawater before the seawater supplied by the pumping force of the ballast pump 113 is divided into each of the ballast tanks 130 formed of a plurality. This is because when the active material is injected after being divided into each ballast tank 130, the active material discharge line (111a) is connected to the ballast line 112, the seawater is supplied to each ballast tank 130, respectively, it is inefficient Because it is.

One or more ballast tanks 130 are installed in the floating offshore structure 100, so that the ballast water is stored (ballast) and discharged (deballast). In this case, when the ballast water is sucked or discharged, the ballast water 112 may be opened or closed by using a remote control valve to allow the ballast water to be sucked into or discharged into the ballast tank 130.

Redundancy lines 114 may be connected to each other between ballast lines 112 connected to a plurality of ballast pumps 113. Here, the redundancy line 114 may connect the ballast line 112 to each other at the rear end of the seawater suction port 140 and the rear end of the ballast pump 113. As such, when some of the seawater inlet 140 or the ballast pump 113 is inoperable by the redundancy line 114, the ballast pump 113 in an inoperative state is disabled using the ballast pump 113 in normal operation. It is possible to supply the ballast water to the connected ballast line (112). In addition, the redundancy line 114 is installed at the rear end of the seawater inlet 140 and the rear end of the ballast pump 113, so that the seawater inlet 140 and other parts of the ballast pump 113 are inoperable, but the other seawater inlet 140 ) And other ballast pumps 113.

In addition to the rig, the offshore structure according to another embodiment having the gravity ballast water treatment apparatus of the present invention may have the gravity ballast water treatment apparatus 110 described above. In addition, the offshore structure having a gravity ballast water treatment apparatus according to another embodiment of the present invention can be applied to a variety of structures having a column 120, for example, Floating Production Storage and Offloading (FPSO), LNG-FPSO (LNG- Floating Production Storage and Offloading) or a semi-submersible rig. In addition, if the gravity-type ballast water treatment apparatus 110 can be installed in a position higher than the ballast tank, the present invention can be applied to various offshore structures having no column, in addition to the offshore structure having a column, such as a rig line.

According to the gravity-type ballast water treatment apparatus and the offshore structure having the same according to the present invention, to minimize the inflow of foreign marine species through the ballast water of the offshore structure 100 to contribute to the preservation of the marine ecosystem and prevention of marine pollution At the same time, it can meet IMO's international convention standards.

In addition, the ballast water treatment device 110 is disposed on the upper portion of the column 120, which is the sea level, so that the treated water that has undergone the treatment is transferred to the ballast tank 130 by gravity, so that a separate transfer pump is unnecessary. Treated water may be discharged overboard as deballast water, thereby eliminating the need for a separate discharge pump. In addition, since the back flushing water of the ballast water treatment device filter can be discharged to the shipboard by gravity, a separate pump for back flushing is unnecessary, and foreign matter existing in the back flushing water can be discharged by gravity. This can prevent clogging.

The ballast water treatment device 110 stores an active material capable of killing aquatic organisms contained in the ballast water, for example, and injects the active material into the ballast line 112, thereby simplifying the treatment of the ballast water. Variation of species due to physical treatment of ballast water by applying the device to the column 120 of the offshore structure 100 and by applying a chemical treatment method for ballast water to the offshore structure 100 and Problems such as regeneration zones, poor treatment efficiency, management difficulties, and the occurrence of secondary pollution should be solved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention will be.

110: gravity ballast water treatment device 111: ballast water treatment unit
111a: active material discharge line 111b: manifold
112: ballast line 113: ballast pump
114: redundancy line 120: column
130: ballast tank 140: seawater intake
150: Pontoon

Claims (9)

An offshore structure having a ballast tank and a ballast water treatment apparatus in a hull, the ballast water treatment apparatus comprising:
A ballast water treatment unit installed at an upper portion of a column provided in the offshore structure to treat ballast water;
A ballast line configured to supply ballast water to the ballast water treatment unit and to transfer the treated water to the lower side by gravity;
Offshore structure comprising a. The method according to claim 1, The ballast water treatment unit,
Offshore structure characterized in that the installation is higher than the ballast tank to receive the treated water through the ballast line used as ballast water. The method according to claim 1, The ballast water treatment unit,
The marine structure, characterized in that for storing the active material that can kill the aquatic organisms contained in the ballast water to inject the active material into the ballast line. The method according to claim 3, The ballast water treatment unit,
A marine structure comprising a manifold formed in the form of an active material storage container and installed to receive an active material from the outside. The method according to claim 3, The ballast line,
Offshore structure, characterized in that made of a reinfored glass fiber material. The method according to claim 1,
And a ballast pump for pumping seawater to be used as ballast water from the seawater inlet of the offshore structure, and supplying it to the ballast water treatment unit through the ballast line.
The ballast water treatment unit, the offshore structure characterized in that the treatment before the water is divided into each of the ballast tank consisting of a plurality of supply. The method of claim 6,
Offshore structure, characterized in that it further comprises a redundancy line connecting each other between the ballast lines connected to each of the ballast pump made of a plurality. The method of claim 7, wherein the redundancy line,
Offshore structure characterized in that for connecting the ballast line with each other at the rear end of the seawater inlet and the rear end of the ballast pump. A method of treating ballast water in an offshore structure having a ballast tank and a ballast water treatment apparatus in the hull,
Ballast water treatment method characterized in that the ballast water is supplied to the ballast water treatment device installed above the ballast tank in the offshore structure and treated, and the treated water is transferred downward by gravity.

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