JP2012179983A - Ballast water treatment system, vessel and floating body type structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ballast water treatment system capable of reducing the full capacity of a ballast water treater while securing the posture control and stability of a vessel during cargo handling work.SOLUTION: A vessel having cargoes of petroleum and/or liquefied gas loaded and unloaded from a floating body type structure 1 is provided with a ballast tank for a vessel, a ballast pump for a vessel, and transfer piping for a vessel connected to the ballast pump for a vessel to transfer untreated ballast water. The floating body type structure 1 for producing, loading and unloading a cargo includes transfer piping 5 for a floating body for transferring untreated ballast water transferred through the transfer piping for a vessel, a ballast pump 4 for a floating body, a ballast tank 2 for a floating body for storing untreated ballast water and a ballast water treatment device 6 for performing sterilization treatment of untreated ballast water. The untreated ballast water is transferred from a vessel to the floating body type structure 1 together with loading and unloading from the floating body type structure 1 to a vessel.

Description

  The present invention relates to a ballast water treatment system that sterilizes aquatic organisms and bacteria in ballast water loaded in a ship's ballast tank, and in particular, ships that transport petroleum and / or liquefied gas and petroleum and / or liquefied gas. It relates to floating structures for production and cargo handling.

  Usually, a ship is provided with a plurality of ballast tanks, and the ballast water such as seawater is stored in the ballast tanks so as to control the attitude of the hull and ensure stability. Ballast water is taken into the ballast tank when the ship is empty, etc., and discharged from the ballast tank to the outside of the ship as cargo handling proceeds at the port. Therefore, the ballast water is drained in a different area from the intake area. As a result, aquatic organisms and bacteria may move with the ballast water and settle in a new environment. In such a case, the ecosystem may be destroyed or economic activities such as the fishery industry may be affected. Is concerned. In addition, there is a concern that the pathogenic bacteria that have moved with the ballast water may directly affect human health.

  Based on this background, the International Maritime Organization (IMO) adopted the Convention on the Management of Ship Ballast Water “International Convention for the Regulation and Management of Ship Ballast Water and Sediment” and Is obliged to implement ballast water management.

  In order to satisfy the above convention, for example, as shown in FIG. 4, untreated ballast water stored in each ballast tank 102 (hereinafter referred to as “untreated ballast water”) is ballasted in the ship 101. The pump 104 is sent to a treatment facility such as a ballast water treatment device 106 to be sterilized. In this way, the untreated ballast water stored in the ballast tank 102 is treated and purified by the ballast water treatment device 106 to be discharged out of the ship as ballast water that has cleared the standard values stipulated in the Convention. can do.

  However, in order to satisfy the convention, it is necessary to mount a ballast water treatment device 106 capable of treating untreated ballast water according to the ballast water tank drainage capacity for each ship 101. However, in particular, when installed on an existing ship, a new treatment facility such as a ballast water treatment device 106 is newly introduced due to restrictions in arrangement and the inability to supply power necessary for the operation of the ballast water treatment device 106. It is difficult to increase the number of pipes and related pipes.

  Patent Document 1 discloses an invention that pays attention to the fact that there are few microorganisms or the like in seawater in the open ocean. That is, a plurality of ballast tanks provided in a ship are divided into at least two groups, and at the port of departure, water is taken into the ballast tanks divided into a certain group to store ballast water. After leaving the port, the ballast water stored in the open ocean sufficiently away from the port of departure is discharged, and instead, the ballast water from the open ocean is taken into the ballast tanks classified into other groups. Thereafter, the ballast water taken in the open ocean at the port of entry is discharged.

  In Patent Document 2, untreated ballast water stored in a ship that does not have a ballast water treatment apparatus is transferred to a ballast water treatment ship that has a ballast water treatment apparatus, and sterilized in the ballast water treatment ship. It is disclosed that the water is discharged out of the ballast water treatment ship after the treatment or the like is performed.

JP 2007-22446 A JP 2009-248854 A

  However, as shown in FIG. 5, for example, when a floating marine oil and / or liquefied gas production storage and loading facility (FPSO) 201 is used, The ship 101 shown in FIG. 4 is an untreated ballast stored in the ballast tank 102 of the ship 101 in accordance with the discharge of oil and / or liquefied gas from the FPSO 201 to the ship 101 (hereinafter referred to as “loading”). Water is discharged and the draft control of the ship 101 is performed.

  Therefore, during cargo handling from the FPSO 201 to the ship 101, the untreated ballast water stored in the ballast tank 102 of the ship 101 is sterilized and purified by the ballast water treatment device 106 mounted on the ship 101. It is necessary to drain outboard.

  In this regard, in the invention described in Patent Document 2, untreated ballast water is transferred from a ship storing untreated ballast water to a ballast water treatment ship, and the untreated ballast water is collected in the ballast water treatment ship. Although it is disclosed that it is treated, draft control such as attitude control and stability of the ship when untreated ballast water is transferred from the ship to a ballast water treatment ship such as FPSO during cargo handling work is disclosed. Not.

  The present invention has been made in view of the above circumstances, and provides a ballast water treatment system capable of reducing the total capacity of a ballast water treatment apparatus while ensuring attitude control and stability of a ship during cargo handling work. The purpose is to provide.

The present invention employs the following means in order to solve the above problems.
According to the ballast water treatment system of the present invention, it is provided with a floating structure that produces and loads oil and / or liquefied gas, and a ship that loads the oil and / or liquefied gas from the floating structure. The marine ballast tank for storing untreated ballast water, the marine ballast pump for sending the untreated ballast water in the marine ballast tank, and the untreated ballast pump connected to the marine ballast pump. A ship transfer pipe for transferring water, and the floating structure is transferred from the float transfer pipe for transferring the untreated ballast water transferred from the ship transfer pipe, and the transfer pipe for the float. A floating ballast pump for sending the untreated ballast water, and a floating ballast tank for storing the untreated ballast water sent by the floating ballast pump; A ballast water treatment device for sterilizing aquatic organisms and / or bacteria in the untreated ballast water sent from the float ballast tank by the float ballast pump, and from the ship to the float structure The untreated ballast water is transferred together with the cargo handling from the floating structure to the ship.

  The untreated ballast water stored in the marine ballast tank is transferred to the floating transfer pipe from the marine transfer pipe by operating the marine ballast pump if necessary due to the gravitational effect or floated by the gravitational effect or if necessary. The ballast pump is operated and sent to the floating ballast tank for water storage. Thereafter, the untreated ballast water stored in the floating ballast tank in accordance with the production of oil and / or liquefied gas is sterilized by the ballast water treatment device provided in the floating structure and discharged from the floating structure. Is done. Oil and / or liquefied gas production per unit time in a floating structure is smaller than the handling amount per unit time in which oil and / or liquefied gas is loaded from a floating structure to a ship. And / or the amount of ballast water per unit time discharged during production of liquefied gas is smaller than the amount of ballast water per unit time transferred during cargo handling. Accordingly, it is possible to reduce the total capacity and / or the number of ballast water treatment apparatuses used in the ballast water treatment system. Further, since the ballast water treatment is performed with the floating structure, it is not necessary to equip a ship used for cargo handling with the floating structure with a ballast water treatment device.

  According to the ship according to the present invention, a marine ballast tank that stores untreated ballast water, a marine ballast pump that sends out the untreated ballast water in the marine ballast tank, and the marine ballast pump are connected, A marine transfer pipe for transferring the untreated ballast water, and loading and unloading the oil and / or liquefied gas from a floating structure that produces and loads oil and / or liquefied gas, and from the marine transfer pipe Untreated ballast water is transferred to the floating structure.

  It was decided to transfer untreated ballast water from the ship to the floating structure as well as cargo handling from the floating structure to the ship. Thereby, unprocessed ballast water can be transferred to a floating structure without performing on a ship, and draft control of a ship at the time of cargo handling can be performed. After unloading, untreated ballast water is purified on the floating structure side alone, so there is no need to install a ballast water treatment device on the ship side. Therefore, it is possible to reduce the cost of building or remodeling the ship.

  According to the floating structure according to the present invention, a floating body transfer pipe for transferring untreated ballast water from the outside, and a floating ballast pump for sending the untreated ballast water transferred from the floating body transfer pipe; A floating ballast tank for storing the untreated ballast water sent by the floating ballast pump, and sterilizing aquatic organisms and bacteria in the untreated ballast water sent from the floating ballast tank by the floating ballast pump A ballast water treatment device to be treated, producing oil and / or liquefied gas on a ship, and treating the untreated ballast water by the ballast water treatment device.

  According to the ballast water treatment system of the present invention, the untreated ballast water stored in the marine ballast tank is moved from the marine transfer pipe to the floating body transfer pipe by a gravity effect or, if necessary, by operating the marine ballast pump. The floated ballast pump is transported and driven to the float ballast tank by the gravity effect or as necessary, and stored. The untreated ballast water stored in the floating ballast tank is sterilized by the ballast water treatment device provided in the floating structure and discharged from the floating structure. Oil and / or liquefied gas production per unit time in a floating structure is smaller than the handling amount per unit time in which oil and / or liquefied gas is loaded from a floating structure to a ship. And / or the amount of ballast water per unit time discharged during production of liquefied gas is smaller than the amount of ballast water per unit time transferred during cargo handling. For example, cargo handling from a floating structure to a ship is often planned in about 12 hours, but the time required for the production of oil and / or liquefied gas in a floating structure is sometimes about 120 hours. Become. Since the amount of transferred ballast water during oil and / or liquefied gas handling is the same as the amount of discharged ballast water during oil and / or liquefied gas production, the ballast water is purified during longer oil and / or liquefied gas production. If it does, the processing capacity per unit time of a ballast water treatment apparatus can be reduced.

It is a figure which shows schematic structure of FPSO which forms the ballast water treatment system which concerns on one Embodiment of this invention, and receives untreated ballast water. It is a figure which shows schematic structure of the ship which forms a ballast water treatment system with FPSO shown in FIG. 1, and transfers untreated ballast water. It is FPSO shown in FIG. 1, Comprising: It is a figure which processes an untreated ballast water and drains it out of a ship. It is a figure which shows schematic structure of the ship which forms the conventional ballast water treatment system, and processes untreated ballast water and drains it out of the ship. It is a figure which shows the schematic structure of FPSO which is corresponding to the ship shown in FIG. 4, and is not equipped with the ballast water treatment apparatus, and accepts untreated ballast water from the outside of the ship. Since the FPSO does not move, it is not necessary to purify the ballast water taken by the FPSO from the outside of the ship.

  Hereinafter, a ballast water treatment system according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. 1 and 3 are views of the FPSO forming the ballast water treatment system according to the present embodiment as viewed from above. FIG. 1 shows that untreated ballast water is received, and FIG. Shows that untreated ballast water is treated and discharged out of the ship. Moreover, FIG. 2 is the figure which looked at the ship which forms the ballast water treatment system which concerns on this embodiment with FPSO shown in FIG. 1 and FIG. 3 from upper direction, Comprising: Untreated ballast water is transferred to FPSO It is shown that.

  A ballast water treatment system according to the present invention includes a floating marine oil and / or liquefied gas production / storage facility (FPSO) equipped with a ballast tank for FPSO (floating ballast tank) 2 and a ballast water treatment device 6. and Offloading system (hereinafter referred to as “FPSO”) 1 and a ship 51 provided with a ship ballast tank 52.

  The FPSO (floating structure) 1 according to this embodiment produces cargo (oil and / or liquefied gas) offshore, stores the produced cargo in a cargo tank (not shown) in the ship, and directly ships Equipment that performs unloading (unloading) to 51 and also processes untreated ballast water transferred from the ship 51 (hereinafter referred to as “untreated ballast water”) by the ballast water treatment device 6 installed in the FPSO 1. It is.

  The FPSO 1 includes an FPSO sea chest 3, two FPSO ballast pumps (floating ballast pumps) 4, a ballast water treatment device 6, an FPSO untreated ballast water transfer pipe (floating body transfer pipe) 5, FPSO ballast piping 7 is provided.

  The FPSO ballast tank 2 stores the untreated ballast water sent from the FPSO ballast pump 4, and a plurality (23 in this embodiment) are provided on the bow portion, the bottom of the boat, or the side of the FPSO 1. Yes.

  The FPSO ballast pipe 7 is for transferring the untreated ballast water transferred from the FPSO untreated ballast water transfer pipe 5 to the FPSO ballast tank 2. The FPSO ballast pipe 7 includes a main pipe 7 a and a branch pipe 7 b that branches from the main pipe 7 a and extends toward the FPSO ballast tank 2 or the FPSO sea chest 3.

  Seawater taken in from the FPSO sea chest 3 flows into one end of the main pipe 7a (the stern side end located on the left side in FIG. 1) via the branch pipe 7b.

  The FPSO ballast pump 4 sends seawater taken in from the FPSO sea chest 3 or untreated ballast water transferred from the FPSO untreated ballast water transfer pipe 5 to the main pipe 7a as necessary. In the present embodiment, the FPSO ballast pump 4 is described as two units, but the number is not limited.

  The FPSO ballast pump 4 includes a merging point 31 where the branch pipe 7b connected to the FPSO sea chest 3 and the main pipe 7a merge, and an FPSO ballast tank 2 positioned closest to the stern side (upstream side). The branch pipe 7b and the main pipe 7a that are connected are branched from the main pipe 7a that connects the junction 32 where the main pipe 7a joins.

  The ballast water treatment device 6 is a device for killing and sterilizing aquatic organisms and bacteria in the untreated ballast water discharged from the FPSO ballast tank 2 by operating the FPSO ballast pump 4 by the gravitational effect or as necessary. It is. Examples of methods for killing aquatic organisms and bacteria using the ballast water treatment device 6 and sterilization treatment include filters, electrolysis, ozone sterilization, UV irradiation, and condensation / separation. Untreated ballast water is discharged as ballast water purified by sterilization by the ballast water treatment device 6.

  For example, four ballast water treatment apparatuses 6 are provided. Two of the ballast water treatment apparatuses 6 are connected between the junction 35 where the branch pipe 7b connected to the FPSO ballast pump 4 and the main pipe 7a merge with the junction 32 described above. It is provided so as to be parallel to the main pipe 7a. The remaining two ballast water treatment devices 6 are provided on the downstream side of each FPSO ballast pump 4.

  Valves 21 are provided in the middle of the branch pipes 7b extending from the main pipe 7a toward the FPSO ballast tanks 2, respectively. These valves 21 are fully opened when the untreated ballast water is poured into the corresponding FPSO ballast tank 2 or when the untreated ballast water is drained from the corresponding FPSO ballast tank 2, and at other times (that is, , When the untreated ballast water is not poured into the corresponding FPSO ballast tank 2 or when the untreated ballast water is not drained from the corresponding FPSO ballast tank 2).

  While the branch pipe 7b connected to each FPSO ballast tank 2 joins the main pipe 7a, the main pipe in the vicinity of the stern side of the junction 32 of the branch pipe 7b and the main pipe 7a located on the most stern side (upstream side). A branch pipe 7c connecting the ballast water treatment device 6 so as to be parallel to the main pipe 7a is joined to 7a. A valve 22 is provided on each branch pipe 7 c connected to the inlet and outlet of the ballast water treatment device 6. This valve 22 is fully opened when the untreated ballast water is drained from each FPSO ballast tank 2, and at other times (when the untreated ballast water is poured into the FPSO ballast tank 2, or the FPSO ballast tank). 2) when untreated ballast water is not drained.

  A valve 23 is provided on the main pipe 7a connecting between the branch pipes 7c connected to the inlet and the outlet of the ballast water treatment device 6 and the junctions 33 and 34 where the main pipe 7a joins. It has been. The junction 33 is provided on the stern side of the junction 34. The valve 23 is fully closed when the untreated ballast water is drained from the FPSO ballast tank 2, and at other times (when the untreated ballast water is poured into the FPSO ballast tank 2, or the FPSO ballast tank 2). When untreated ballast water is not drained).

  A junction 31 where the branch pipe 7b connected to the FPSO sea chest 3 joins the main pipe 7a, and a junction 35 where the branch pipe 7b connected to the FPSO ballast pump 4 joins the main pipe 7a. A valve 24, which is a suction valve, is provided on the main pipe 7a connecting the two. The valve 24 is fully opened when untreated ballast water is poured into each FPSO ballast tank 2, and at other times (that is, when untreated ballast water is not poured into each FPSO ballast tank 2, or each When the untreated ballast water is drained from the FPSO ballast tank 2, it is fully closed.

  In the main pipe 7a connecting the junction 35 and the branch pipe 7c connecting the ballast water treatment device 6 so as to be parallel to the main pipe 7a, the junction 33 connecting the main pipe 7a, Branch pipe 7d branched and connected from branch pipe 7e connecting between the outlet of FPSO ballast pump 4 and the inlet of ballast water treatment device 6 provided downstream of FPSO ballast pump 4 Have joined. A valve 25 is provided on the branch pipe 7d. This valve 25 is fully opened when the untreated ballast water is poured into each FPSO ballast tank 2, and at other times (that is, when the untreated ballast water is not poured into each FPSO ballast tank 2, or When the untreated ballast water is drained from the FPSO ballast tank 2, it is fully closed.

On the branch pipe 7e that connects between the outlet of the ballast pump 4 for FPSO and the inlet of the ballast water treatment device 6, and upstream of the branch point 37 to which the branch pipe 7d is branched and connected. Are provided with a check valve 30 and a valve 29. The check valve 30 is provided on the upstream side of the valve 29. The valve 29 is fully opened when the untreated ballast water is poured into each FPSO ballast tank 2 and when the untreated ballast water is drained from the FPSO ballast tank 2. When the untreated ballast water is not poured into the FPSO ballast tank 2 or when the untreated ballast water is not drained from the FPSO ballast tank 2, it is fully closed.
The check valve 30 was led to the branch pipe 7e when untreated ballast water was poured into each FPSO ballast tank 2 and when untreated ballast water was drained from the FPSO ballast tank 2. Untreated ballast water is prevented from flowing back to the FPSO ballast pump 4.

  Further, the branch pipe 7b connected to the FPSO ballast pump 4 connects the junction 35 where the branch pipe 7b joins the main pipe 7a and the junction 36 where the branch pipe 7d joins the main pipe 7a. A valve 26 is provided on the main pipe 7a. This valve 26 is fully opened when untreated ballast water is drained from each FPSO ballast tank 2, and at other times (when untreated ballast water is poured into the FPSO ballast tank 2, or for each FPSO It is fully closed when untreated ballast water is not drained from the ballast tank 2.

  A branch pipe 8b for an outboard drain line is connected to the outlet of the ballast water treatment device 6. The other end of the branch pipe 8b for the outboard drainage line is joined to the outboard drainage line 8 extending toward the shore side outer plate along the ship width direction. A valve 27 is provided on the branch pipe 8b for the outboard drainage line. This valve 27 is fully opened when untreated ballast water is drained from each FPSO ballast tank 2, and at other times (when untreated ballast water is poured into the FPSO ballast tank 2, or for each FPSO It is fully closed when untreated ballast water is not drained from the ballast tank 2.

  The outboard drainage line 8 is provided across the width of the ship in a direction orthogonal to the bow-stern direction. An outboard discharge port 9 that opens to the outside of the ship is provided at the end of the outboard drain line 8. A valve 28 serving as an outboard valve is provided on the outboard drainage line 8 in the vicinity of the outboard discharge port 9. The outboard valve 28 is fully opened when the ballast water treated and purified by the ballast water treatment device 6 is drained, and otherwise (when untreated ballast water is poured into the FPSO ballast tank 2, Alternatively, the ballast water treated by the ballast water treatment device 6 and purified is not fully drained).

  The valves 21, 22, 23, 25, 26, 27, 28, 29 and the valve 41 described later are respectively a bridge (not shown), an engine room (not shown), and an engine control room (not shown). Alternatively, it is configured to be remotely operable from a control panel (not shown) disposed in the cargo handling control room (not shown).

  The untreated ballast water transfer pipe 5 for FPSO extends toward the stern deck (not shown) from the vicinity of the ship bottom where the branch pipe 7b connected to the FPSO sea chest 3 is disposed.

  The other end of the untreated ballast water transfer pipe 5 for FPSO can be connected to a marine untreated ballast water transfer pipe 55 described later. A valve 41 is provided in the middle of the untreated ballast water transfer pipe 5 for FPSO, and this valve 41 is opened when the untreated ballast water is transferred from the outside of the FPSO 1 to the FPSO 1. (When draining untreated ballast water from each FPSO ballast tank 2), it is fully closed.

  The ship 51 according to the present embodiment is a ship that transports cargo produced and shipped in the FPSO 1 to a destination. The ship 51 includes a marine sea chest 53, a marine ballast pump 54 (two in this embodiment), a marine untreated ballast water transfer pipe (marine transfer pipe) 55, and a marine ballast pipe 57.

  The marine ballast tank 52 stores untreated ballast water sent by operating the marine ballast pump 54 due to the gravitational effect or as needed. 23 in the form) are provided.

  The marine ballast pipe 57 is for transferring untreated ballast water stored in the marine ballast tank 52 to the marine untreated ballast water transfer pipe 55. The marine ballast pipe 57 includes a main pipe 57 a and a branch pipe 57 b that branches from the main pipe 57 a and extends toward the marine ballast tank 52 or the marine sea chest 53.

  Seawater taken from the marine sea chest 53 flows into one end of the main pipe 57a (the stern side end located on the left side in FIG. 2) via the branch pipe 57b.

  The marine ballast pump 54 takes seawater from the marine sea chest 53 and feeds it to the marine ballast tank 52 to control the draft of the marine vessel 51, or untreated ballast water that is seawater stored in the marine ballast tank 52. Is sent from the marine ballast pipe 57 to the marine untreated ballast water transfer pipe 55.

  For example, valves 71 are respectively provided in the middle of the branch pipes 57 b extending from the main pipe 57 a toward the marine ballast tanks 52. These marine valves 71 are fully opened when untreated ballast water is poured into the corresponding marine ballast tank 52, or when untreated ballast water is drained from the corresponding marine ballast tank 52, and at other times (ie, When the untreated ballast water is not poured into the corresponding marine ballast tank 52, or when the untreated ballast water is not drained from the corresponding marine ballast tank 52), it is fully closed.

  Of the main pipes 57 a, to which the branch pipes 57 b connected to the marine ballast tanks 52 are joined, the branch pipe 57 b located on the stern side (upstream side) of the main pipe 57 a and the main pipe 57 a are connected to the junction 82 and the marine sea chest 53. The branch pipe 57b connected to the marine ballast pump 54 is joined at the junction 85 to the main pipe 57a connecting the junction pipe 81b to the junction 81 where the branch pipe 57b is joined to the main pipe 57a. is doing.

  A valve 74 that is a suction valve is provided on the main pipe 57 a that connects the junction 85 and the junction 81. This valve 74 is fully opened when untreated ballast water is poured into each marine ballast tank 52, and at other times (that is, when untreated ballast water is not poured into each marine ballast tank 52, or each marine ballast It is fully closed when untreated ballast water is drained from the tank 52).

  A marine ballast is connected to the main pipe 57a connecting the junction 85 and a junction 57b between the branch pipe 57b connected to the marine ballast tank 52 located on the most stern side (upstream side) and the main pipe 57a. A branch pipe 57d connected to the outlet of the pump 54 is joined. A valve 75 is provided on the branch pipe 57d. This valve 75 is fully opened when untreated ballast water is poured into each marine ballast tank 52, and is fully closed at other times (when untreated ballast water is drained from the marine ballast tank 52). .

  The merge point 86 where the branch pipe 57d connected to the downstream side of the marine ballast pump 54 merges with the main pipe 57a and the branch pipe 57b connected to the upstream side of the marine ballast pump 54 merge with the main pipe 57a. A valve 76 is provided on the main pipe 57 a connecting the point 85. This valve 76 is fully opened when untreated ballast water is drained from each marine ballast tank 52, and is fully closed at other times (when untreated ballast water is poured into the marine ballast tank 52). .

  A check valve 80 is provided on the branch pipe 57 d connected to the downstream side of the marine ballast pump 54 and upstream of the valve 75. A branch pipe 58b for an outboard drain line is connected between the check valve 80 and the valve 75. The other end of the branch pipe 58b for the outboard drainage line is joined to the outboard drainage line 58 extending toward the dredging outer plate along the ship width direction. A valve 77 is provided on the branch pipe 58b for the outboard drainage line. This valve 77 is fully opened when the untreated ballast water is drained from each marine ballast tank 52, and is fully closed at other times (when the untreated ballast water is poured into the marine ballast tank 52). .

  The outboard drainage line 58 is received over the width of the ship in a direction orthogonal to the bow-stern direction. An outboard discharge port 59 that opens to the outside of the ship is provided at the end of the outboard drain line 58. A valve 78 that is an outboard valve is provided in the vicinity of the outboard discharge port 59 of the outboard drain line 58. For example, the valve 78 has an interlock mechanism that is fully closed when draining untreated ballast water from each marine ballast tank 52, such as a non-treated ballast water from the outboard discharge port 59. Can not be drained.

  Valves 71, 74, 75, 76, 77 and valve 91 described later are configured to be remotely operable from a control panel (not shown) disposed in the bridge, engine room, engine control room, or cargo handling control room, respectively. Has been.

  The marine untreated ballast water transfer pipe 55 extends toward the stern deck (not shown) from the vicinity of the ship bottom where the branch pipe 57b connected to the marine sea chest 53 is disposed. It extends on the deck.

  The other end of the marine untreated ballast water transfer pipe 55 can be connected to the aforementioned FPSO untreated ballast water transfer pipe 5 (see FIG. 1). A valve 91 is provided at an intermediate position of the marine untreated ballast water transfer pipe 55, and this valve 91 is opened when the untreated ballast water is transferred from each marine ballast tank 52 of the marine vessel 51 to the FPSO 1. In other cases (when untreated ballast water is poured into the marine ballast tank 52), it is fully closed.

Next, a method for transferring untreated ballast water from the ship 51 to the FPSO 1 will be described with reference to FIGS. 1 and 2.
The untreated ballast water is transferred from the ship 51 to the FPSO 1 during cargo handling from the FPSO 1 to the ship 51.

  That is, when cargo handling from the FPSO 1 to the ship 51 is performed, the end of the FPSO untreated ballast water transfer pipe 5 and the end of the ship unprocessed ballast water transfer pipe 55 are connected. Thereafter, for example, a marine ballast tank 52 that drains untreated ballast water is selected from the marine vessel 51 according to the status of cargo handling from the FPSO 1 to the marine vessel 51.

  The untreated ballast water stored in the marine ballast tank 52 of the marine vessel 51 is transferred to the FPSO ballast tank 2 in accordance with the cargo handling situation from the FPSO 1 to the marine vessel 51. Therefore, it is not necessary to process untreated ballast water in the ship 51 and drain the ballast water processed out of the ship from the outboard valve 78 of the ship 51. Therefore, it is not necessary to equip the ship 51 with a ballast processing device.

  For example, the open / close state of the valve 71 and the valves 74, 75, 77 corresponding to the marine ballast tank 52 to be drained is selected (determined: input). From the control panel, the valve 76 is fully opened.

  From the control panel, the operation switch of the marine ballast pump 54 is turned on (turned on), and the marine ballast pump 54 is operated (activated). When the operation of the marine ballast pump 54 is started, untreated ballast water from the selected marine ballast tank 52 starts to be injected into the marine ballast pump 54 through the main pipe 57a.

  The untreated ballast water sucked by the marine ballast pump 54 is led out from the branch pipe 58b for the outboard drainage line to the outboard drainage line 58. At this time, an interlock mechanism or the like is working so that untreated ballast water is not sent from the outboard valve 78 provided in the outboard drain line 58 to the outboard discharge port 59. The untreated ballast water led out to the outboard drain line 58 is sent to the marine untreated ballast water transfer pipe 55.

  On the other hand, in FPSO1, FPSO ballast tank 2 for injecting untreated ballast water is selected (determined) from the control panel provided in the cargo handling control chamber of FPSO1, for example, depending on the status of cargo handling from FPSO1 to ship 51. : Input).

  Next, the open / close state of the valve 21, the valves 22, 23, 25, 26, 27, 28, 29 corresponding to the marine ballast tank 2 to be injected is selected (determined: input).

  The operation switch of the FPSO ballast pump 4 is turned on (turned on) from the control panel, and the FPSO ballast pump 4 is operated (started). Further, the valve 24 which is a suction valve provided in the main pipe 7a is fully opened.

  Thus, when the valve 41 provided in the FPSO untreated ballast water transfer pipe 5 and the valve 91 provided in the ship untreated ballast water transfer pipe 55 are fully opened, water is stored in the ship 51. The untreated ballast water that has been used can be transferred to FPSO1.

  The untreated ballast water transferred to the FSPO 1 from the ship 51 through the ship untreated ballast water transfer pipe 55 and the FPSO untreated ballast water transfer pipe 5 is sucked into the FPSO ballast pump 4 to be branched into the branch pipes 7e and 7d. The point 36 is led out to the main pipe 7a.

  The untreated ballast water led to the main pipe 7a is poured into the selected FPSO ballast tank 2 through the valve 23 and the valve 21 corresponding to the FPSO ballast tank 2 in which the untreated ballast water is stored. It will be.

  Moreover, in order to transfer the untreated ballast water stored in the ship ballast tank 52 of the ship 51 to the FPSO ballast tank 2 in accordance with the cargo handling situation from the FPSO 1 to the ship 51, It is possible to ensure attitude control and stability of the ship 51 associated with cargo handling.

Next, a method for treating untreated ballast water transferred from the ship to the FPSO will be described with reference to FIG.
FIG. 3 shows that the untreated ballast water transferred from the ship 51 shown in FIG. 2 is treated in the FPSO 1 and discharged outside the ship.

  For example, when the untreated ballast water is treated and drained from the FPSO 1, for example, the FPSO ballast tank 2 for draining the untreated ballast water is selected (determined) from the control panel provided in the cargo handling control chamber of the FPSO 1. :input.

  Next, the open / closed state of the valve 21 and the valves 23, 24, 25, 27 corresponding to the FPSO ballast tank 2 to be drained is selected (determined: input). From the control panel, the valve 22 and the valve 26 are fully opened.

  The operation switch of the FPSO ballast pump 4 is turned on (turned on) from the control panel, and the FPSO ballast pump 4 is operated (started). When the operation of the FPSO ballast pump 4 is started, the untreated ballast water from the selected FPSO ballast tank 2 passes through the main pipe 7a and the junction 34 to the ballast water treatment apparatus 6 connected in parallel to the main pipe 7a. And water is poured.

  The untreated ballast water poured into the ballast water treatment device 6 through the branch pipe 7c is sterilized by killing the aquatic organisms and bacteria in the untreated ballast water by the ballast water treatment device 6. The untreated ballast water is treated and purified by the ballast water treatment device 6 to become purified ballast water and is discharged from the outlet of the ballast water treatment device 6 to the branch pipe 7c.

  The purified ballast water is led to the main pipe 7a from the junction 33 where the branch pipe 7c joins the main pipe 7a. The ballast water led out to the main pipe 7a is led to the FPSO ballast pump 4 through the valve 26 and the junction 35.

  Ballast water sucked by the gravity effect or by operation of the FPSO ballast pump 4 as necessary is discharged from the outlet side of the FPSO ballast pump 4 and is provided on the downstream side of the valve 29 and the valve 29. Guided to the water treatment device 6.

  The ballast water led to the ballast water treatment device 6 becomes ballast water that has been purified by sterilizing and purifying the remaining aquatic organisms and bacteria remaining in the ballast water by the ballast water treatment device 6. It is discharged from the outlet of the device 6 to the branch pipe 8b for the outboard drainage line.

  Ballast water discharged to the branch pipe 8b for the outboard drainage line is guided to the outboard drainage line 8 from the branch pipe 8b for the outboard drainage line. Here, the outboard valve 28 provided on the outboard drain line 8 is opened. Therefore, the ballast water guided to the outboard drain line 8 is drained from the outboard discharge port 9 to the outboard via the outboard valve 28.

  Here, since the production amount per unit time of cargo in FPSO1 is smaller than the handling amount per unit time when cargo is handled from FPSO1 to the ship 51, the ballast per unit time discharged at the time of cargo production. The amount of water is smaller than the amount of ballast water per unit time transferred during handling.

  Since the amount of ballast water transferred during cargo handling and the amount of discharged ballast water during cargo production are the same, if the ballast water is to be purified during cargo production, which takes longer time, the per unit time of the ballast water treatment system The processing capacity can be reduced. For example, cargo handling from the FPSO 1 to the ship 51 is often planned in about 12 hours, but in some cases, the time required for production of cargo in the FPSO 1 is about 120 hours. In this case, if the ballast water is purified during cargo production, the capacity of the ballast water treatment device 6 is 1/10 of the conventional capacity.

As described above, according to the ballast water treatment system, the ship 51 and the FPSO 1 according to the present embodiment, the following operational effects can be obtained.
The untreated ballast water stored in the marine ballast tank 52 is caused by the gravitational effect or, if necessary, by operating the marine ballast pump 54 from the marine untreated ballast water transfer pipe (marine transfer pipe) 55 to the untreated ballast for FPSO. FPSO ballast pump (floating ballast pump) 4 is driven to the FPSO ballast tank (floating ballast tank) 2 by the gravity transfer effect or when necessary. It is sent out and stored. Thereafter, the untreated ballast water stored in the FPSO ballast tank 2 during cargo production is sterilized by the ballast water treatment device 6 provided in the FPSO (floating structure) 1 and drained from the FPSO 1. Since the production amount per unit time of cargo in FPSO1 is smaller than the handling amount per unit time when cargo is handled from FPSO1 to the ship 51, the amount of ballast water per unit time discharged at the time of cargo production is It becomes smaller than the amount of ballast water per unit time transferred at the time of cargo handling. Since the amount of ballast water transferred during cargo handling and the amount of discharged ballast water during cargo production are the same, if the ballast water is purified during cargo production, which takes longer time, the per unit time of the ballast water treatment device 6 The processing capacity can be reduced.

  The untreated ballast water was transferred from the ship 51 to the FPSO 1 along with the cargo handling from the FPSO 1 to the ship 51. Thus, the untreated ballast water can be transferred to the FPSO 1 without being processed in the ship 51, and the draft of the ship 51 can be controlled during loading. Therefore, installation of the ballast water treatment device in the ship 51 can be made unnecessary. Therefore, the construction cost of the ship 51 can be reduced.

  In the present embodiment, the floating structure is described as FPSO1, but the present invention is not limited to this, and floating marine oil and / or liquefied gas storage and loading equipment (FSO: Floating Storage and Offloading). system). When the floating structure is FSO, the oil and / or liquefied gas produced by the onshore oil and / or liquefied gas production facility is stored in the FSO, and then the cargo handling is performed from the FSO to the ship 51.

  Furthermore, in this embodiment, although the ship 51 was demonstrated as a new shipbuilding, this invention is not limited to this, The existing ship may be sufficient. When the ship 51 is an existing ship, a construction for additionally installing a marine untreated ballast water transfer pipe 55 is required.

  Further, in the existing marine ballast pump 54, when the discharge capacity is not sufficient, it is necessary to add the marine ballast pump 54 to the ship. This makes it possible to transfer the untreated ballast water from the marine untreated ballast water transfer pipe 55 to the FPSO 1 by raising the untreated ballast water to the deck.

  Furthermore, in the present embodiment, it has been described that there is no drainage of ballast water from the ship 51. However, the present invention is not limited to this, and a small-capacity ballast water treatment device may be provided in the ship 51. good.

1 FPSO (floating structure)
2 Ballast tank for FPSO (ballast tank for floating body)
4 Ballast pump for FPSO (ballast pump for floating body)
5 Untreated ballast water transfer pipe for FPSO (transfer pipe for floating body)
6 Ballast Water Treatment Device 51 Ship 52 Ballast Tank for Ships 54 Ballast Pump for Ships 55 Unprocessed Ballast Water Transfer Pipe for Ships (Transport Pipe for Ships)

Claims (3)

Floating structures that produce and load oil and / or liquefied gas;
A ship for handling the oil and / or liquefied gas from the floating structure,
The marine ballast tank for storing untreated ballast water, a marine ballast pump for sending the untreated ballast water in the marine ballast tank, and the untreated ballast water connected to the marine ballast pump. A marine transfer pipe for transferring
The floating structure includes a floating body transfer pipe for transferring the untreated ballast water transferred from the marine transfer pipe, and a floating body ballast pump for delivering the untreated ballast water transferred from the floating body transfer pipe. A floating ballast tank for storing the untreated ballast water sent by the floating ballast pump, and an underwater organism in the untreated ballast water sent from the floating ballast tank by the floating ballast pump and / or A ballast water treatment device for sterilizing bacteria,
The ballast water treatment system is characterized in that the untreated ballast water is transferred from the ship to the floating structure along with cargo handling from the floating structure to the ship. A marine ballast tank for storing untreated ballast water;
A marine ballast pump for delivering the untreated ballast water in the marine ballast tank;
A marine transfer pipe connected to the marine ballast pump and transferring the untreated ballast water;
The oil and / or liquefied gas is loaded from a floating structure that produces and loads oil and / or liquefied gas, and the untreated ballast water is transferred from the marine transfer pipe to the floating structure. Ship. A floating transfer pipe for transferring untreated ballast water from the outside;
A floating ballast pump for delivering the untreated ballast water transferred from the floating transfer pipe;
A floating ballast tank for storing the untreated ballast water delivered by the floating ballast pump;
A ballast water treatment device for sterilizing aquatic organisms and bacteria in the untreated ballast water sent from the float ballast tank by the float ballast pump,
A floating structure characterized by handling oil and / or liquefied gas to a ship and treating the untreated ballast water by the ballast water treatment device.

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