JP2012245852A - Liquefied fuel transporting vessel, method of converting vessel, vessel, and liquefied fuel transporting vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of converting a liquefied fuel transporting vessel, which can easily place various kinds of ballast water treatment apparatus in a vessel such as a liquefied fuel transporting vessel.SOLUTION: In the method of converting the liquefied fuel transporting vessel including a bulkhead 11 partitioning between an LNG tank 2 and an engine room 10, an outboard part on a board side of the engine room 10 is provided with a carry-in opening part 20 for the ballast water treatment device. Next, a processing unit of the ballast water treatment device is carried into through the carry-in opening part 20, and then, the processing unit is disposed on a bow side or on a board side of a ballast pump 17 provided in the engine room 10. Thereafter, piping is provided between the ballast pump 17 and the processing unit, and the existing ballast water piping and the processing unit side piping are connected to each other.

Description

  The present invention relates to a ship such as a liquefied fuel transport ship and a cargo ship equipped with a ballast water treatment apparatus that processes or removes or kills microorganisms contained in ballast water. The present invention relates to a method, a ship, and a liquefied fuel transport ship.

The ballast water of a ship is seawater or fresh water loaded on a ballast tank in order to control the attitude of the hull and ensure stability, and is essential for safe operation of the ship. The ballast water is sucked with a pump when the ship is empty, loaded into the ballast tank (taken in water), and discharged (drained) at the port where the cargo is loaded, along with the progress of the load.
The above-mentioned ballast water contains various microorganisms (aquatic organisms). In addition to microscopic organisms (microorganisms such as bacteria and floating organisms such as plankton), these microorganisms include eggs and larvae such as fish.

Therefore, since the ballast water is drained to a port (water area) different from the loading area, if the microorganisms that have moved with the ballast water settle in a new environment, economic activities such as ecosystems and fisheries in that water area There is a concern that it will affect. There is also concern that some pathogens that have moved with the ballast water directly affect human health.
For this reason, the International Maritime Organization (IMO) has ratified a convention on the management of microorganisms contained in ballast water, and requires that microorganisms be removed or killed during the intake or drainage of ballast water. .

As a device for removing or killing microorganisms in the ballast water, a shearing phenomenon (in which the ballast water passes through a slit plate provided in the flow path at a predetermined flow velocity or more and exists in the flow disturbed by the passage of the slit ( A submerged microorganism killing device has been proposed that utilizes the shearing speed of the flow rate depending on the location) to destroy and kill microorganisms in the liquid by this shearing.
In addition, as another device for removing or killing microorganisms in the ballast water, a slit plate with a shifted slit position is arranged at the front and back, and for microorganisms that were not destroyed by shearing with the previous slit plate, A submerged microorganism killing device has also been proposed in which the cavitation generated by the slit plate is destroyed using an impact pressure generated when the rear slit plate is crushed, thereby further killing the cavitation.

However, in the conventional ship, there is a situation that there is no surplus space enough to install a ballast water treatment device around the ballast pump.
From such a background, a ballast water treatment apparatus that is required to be installed in the future, as disclosed in, for example, Patent Document 1 below, does not require a significant change in hull design and is installed on a new shipbuilding. As a matter of course, there has been proposed a ship having a structure that can be easily applied when an existing ship is modified and installed. In other words, Patent Document 1 discloses various types of ballast water treatment apparatuses for various kinds of ships (particularly general merchant ships) by disposing the ballast water treatment apparatus in the steering machine room behind the ship. There has been proposed a ship having a structure that can be easily installed at an appropriate place on a ship.

JP 2009-67253 A

In a conventional ship, it is difficult to secure a surplus space that can be easily additionally installed around the ballast pump. Therefore, it is conceivable to install the ballast water treatment device in a place away from the ballast pump.
However, if the ballast pump and the ballast water treatment device are separated from each other, the length of the pipe through which the ballast water flows increases, and the problem of increased pressure loss arises.

For ships that transport dangerous goods, such as tankers (LNG ships, LPG ships, oil carriers, etc.), if the ballast water treatment device is installed in the hazardous area of the ship, the ballast water treatment device must be explosion-proof. Therefore, there will be a significant cost increase.
In addition, it has been pointed out that the remodeling work for installing the ballast water treatment device on the in-service vessel is a work in a narrow ship, so that the construction period becomes longer due to many restrictions.

In this way, in future ships, it is necessary to easily install various ballast water treatment devices because it is necessary to install a ballast water treatment device regardless of whether the ship is new or in service. Specifically, there is a demand for a ship and a ship remodeling method that can suppress an increase in the amount of piping and pressure loss associated with the installation of a ballast water treatment device.
Further, in a ship that transports dangerous goods, a ship that can use a non-explosion-proof ballast water treatment apparatus and a ship remodeling method are desired.

Furthermore, in the existing service ship, the ship and the ship remodeling method which can shorten the construction period required for the remodeling in the case of installing a ballast water treatment apparatus are desired.
The present invention has been made in view of the above circumstances, and the object of the present invention is various kinds of ships, in particular, various kinds of ships such as cargo ships and liquefied fuel transport ships. An object of the present invention is to provide a liquefied fuel transport ship, a ship remodeling method, a ship, and a liquefied fuel transport ship that allow a ballast water treatment device to be easily installed.

In order to solve the above problems, the present invention employs the following means.
A method for remodeling a liquefied fuel transport ship according to claim 1 of the present invention is a method for remodeling a liquefied fuel transport ship including a spherical liquefied fuel tank and a partition partitioning the liquefied fuel tank and the engine room. A ballast water treatment apparatus carrying-in opening is provided on the outer side of the outer side of the engine room, and then the processing unit of the ballast water treatment apparatus is carried from the carrying-in opening, and then into the engine room. The processing unit is arranged on the bow side or the berth side of the installed ballast pump, and then piping between the ballast pump and the processing unit, respectively, and existing ballast water piping and processing unit side piping Are connected to each other.

According to such a method for remodeling a liquefied fuel transport ship, the carry-in opening of the ballast water treatment device is provided in the outer plate part on the shore side of the engine room, and then the treatment unit of the ballast water treatment device is installed from the carry-in opening. Carry in, and then place the processing unit on the bow side or the berth side of the ballast pump installed in the engine room, and then pipe between the ballast pump and the processing unit respectively, as well as existing ballast water piping And the processing unit side piping are connected, it becomes possible to easily carry out the inboard work of the remodeling work in which the ballast water treatment device is installed in the narrow ship of the in-service ship, and the construction period can be shortened.
As a result of such modifications, the ballast water treatment device is installed in the vicinity of the ballast pump, so that it is possible to minimize the piping length and pressure loss associated with the installation of the ballast water treatment device. Explosion-proof ballast water treatment equipment can be used.

  The method for remodeling a liquefied fuel transport ship according to claim 2 of the present invention is a method for remodeling a liquefied fuel transport ship comprising a spherical liquefied fuel tank and a partition partitioning the liquefied fuel tank and the engine room. , A carry-in opening of the ballast water treatment device is provided in the outer plate on the heel side of the engine room, and then the treatment unit and the filter unit of the ballast water treatment device are carried in from the carry-in opening, The processing unit is disposed on the shipowner side or the berth side of the ballast pump installed in the engine room, the filter unit is disposed between the ballast pump and the bulkhead, and then the ballast pump and the filter unit, And a pipe between the filter unit and the processing unit, and an existing ballast water pipe and a unit side pipe are connected. A.

According to such a method for remodeling a liquefied fuel transport ship, a carry-in opening of the ballast water treatment device is provided on the outer plate part on the shore side of the engine room, and then, from the carry-in opening, the treatment unit of the ballast water treatment device and The filter unit is carried in, the processing unit is placed on the shipowner side or the anchor side of the ballast pump installed in the engine room, and the filter unit is placed between the ballast pump and the bulkhead. As the piping between the pump and the filter unit, and between the filter unit and the treatment unit are connected, and the existing ballast water piping and the unit side piping are connected, the remodeling work to install the ballast water treatment device in the narrow ship of the ship in service This makes it possible to easily carry out the inboard work and shorten the construction period.
As a result of such modifications, the ballast water treatment device is installed in the vicinity of the ballast pump, so that it is possible to minimize the piping length and pressure loss associated with the installation of the ballast water treatment device. Explosion-proof ballast water treatment equipment can be used.

  A method for remodeling a liquefied fuel transport ship according to claim 3 of the present invention is a method for remodeling a liquefied fuel transport ship provided with a spherical liquefied fuel tank and a partition partitioning the liquefied fuel tank and the engine room. In the above, the partition wall is extended to a position below the stern of the liquefied fuel tank, and a ballast water treatment device is installed in the extended portion.

  According to such a method for remodeling a liquefied fuel transport ship, a bulkhead is extended to a position below the stern of the liquefied fuel tank, and a ballast water treatment device is installed in the extended part. It is possible to install the ballast water treatment device in the vicinity of the ballast pump by effectively using the unused space. More specifically, the void space unique to the MOSS type liquefied fuel transport ship, that is, the space near the ballast pump that is located on the bow side of the engine compartment bulkhead and is not effectively used due to the influence of the liquefied fuel tank that is spherical. Use it effectively.

  The ship remodeling method according to claim 4 of the present invention is a ship remodeling method comprising a ship or a residential area and an engine room, wherein a carry-in opening of the ballast water treatment device is provided on the shore side outer plate part of the engine room. Next, the ballast water treatment device is suspended from the carry-in opening and is carried to a predetermined position in the engine room. Next, the suspension is loosened and the ballast water treatment device is disposed at a predetermined position in the engine room. Then, the existing ballast water pipe and the ballast water treatment apparatus side pipe are connected.

According to such a ship remodeling method, the carry-in opening of the ballast water treatment device is provided in the outer side plate portion of the engine room, and then the ballast water treatment device is suspended from the carry-in opening. Carry in up to the predetermined position, then loosen the suspension, place the ballast water treatment device at the predetermined position in the engine room, and connect the existing ballast water piping and the ballast water treatment device side piping. It becomes possible to easily carry out onboard work of remodeling work in which a ballast water treatment device is installed in a narrow ship, and the construction period can be shortened.
And by such modification, since the ballast water treatment device is installed in the vicinity of the ballast pump, it becomes possible to minimize the piping length and pressure loss accompanying the installation of the ballast water treatment device.

  According to a fifth aspect of the present invention, there is provided a ship having a partition wall separating a ship or a residential area side and an engine room, and a ship provided with a ballast pump in the engine room. The treatment unit of the treatment apparatus is characterized in that the filter unit of the ballast water treatment apparatus is arranged between the ballast pump and the partition wall.

According to such a ship, the ballast water treatment device treatment unit is disposed on the bow side or the berth side of the ballast pump, and the ballast water treatment device filter unit is disposed between the ballast pump and the partition wall. A processing device can be installed in the vicinity of the ballast pump to minimize piping length and pressure loss. In other words, the configuration in which the partition wall is moved toward the ship side to secure the installation space for the ballast water treatment device can minimize the increase in pipe length and pressure loss associated with the installation of the ballast water treatment device.
In this case, it is preferable that the filter unit of the ballast water treatment device is disposed in a partition wall portion extending below the stern side on the side of the shipboard or the residential area, whereby the ballast water treatment device is used in a ship such as a cargo ship. It is possible to minimize the reduction of the loading space of the ship accompanying the installation of the ship.

  A liquefied fuel transport ship according to claim 7 of the present invention is a liquefied fuel transport ship including a spherical liquefied fuel tank, a partition partitioning the liquefied fuel tank and the engine room, and a ballast pump in the engine room. The ballast water treatment device treatment unit is disposed on the heel side of the ballast pump, and the ballast water treatment device filter unit is disposed between the ballast pump and the partition wall.

According to such a liquefied fuel transport ship, the ballast water treatment device treatment unit is disposed on the shore side of the ballast pump, and the ballast water treatment device filter unit is disposed between the ballast pump and the partition wall. A processing device can be installed in the vicinity of the ballast pump to minimize piping length and pressure loss. That is, the configuration in which the partition wall is moved to the liquefied fuel tank side to secure the installation space for the ballast water treatment device can minimize the increase in pipe length and pressure loss due to the installation of the ballast water treatment device.
In this case, it is preferable that the filter unit is disposed in a partition wall portion extending below the stern side of the liquefied fuel rod as the rearmost, so that in the liquefied fuel transport ship, the filter unit is disposed below the stern side of the liquefied fuel rod. It is possible to efficiently install the ballast water treatment device by effectively utilizing the existing unused space (for example, void space).

According to the present invention described above, various ballast water treatment devices can be efficiently and easily installed on a wide variety of ships such as cargo ships and liquefied fuel transport ships, regardless of whether they are new or in service.
And since it becomes possible to install a ballast water treatment apparatus in the vicinity of a ballast pump, the increase in the amount of piping and pressure loss accompanying installation of a ballast water treatment apparatus can be controlled.

Further, in a ship such as a liquefied fuel transport ship that transports dangerous substances, a non-explosion-proof ballast water treatment device can be installed on the engine room side of the partition wall, which is advantageous in terms of cost.
Furthermore, since existing service ships are provided with a carry-in opening and a ballast water treatment device is installed, work in a narrow ship is facilitated, and the construction period required for remodeling can be shortened.

It is a figure which shows one Embodiment about the liquefied fuel transport ship which concerns on this invention, a ship's remodeling method, a ship, and a liquefied fuel transport ship, and is a side view which shows the ship starboard rear part of a liquefied natural gas (LNG) transport ship. FIG. 2 is a plan view of the bottom deck of the liquefied natural gas (LNG) transport ship shown in FIG. 1. The side view of the principal part which shows the ship's starboard rear part of the liquefied natural gas (LNG) transport ship in the figure which shows other embodiment about the liquefied fuel transport ship which concerns on this invention, the remodeling method of a ship, a ship, and a liquefied fuel transport ship. It is. It is a side view of the ship starboard rear part which shows the example of the carrying-in opening part of the ballast water treatment apparatus provided in the shore side outer-plate part of an engine room with respect to the liquefied natural gas (LNG) transport ship shown in FIG. It is explanatory drawing which shows the state at the time of carrying in a ballast water treatment apparatus into a ship from the carrying-in opening part shown in FIG. It is a side view which shows the ship starboard of a liquefied natural gas (LNG) transport ship as an example of a ship.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a liquefied fuel transport ship, a ship remodeling method, a ship, and a liquefied fuel transport ship according to the present invention will be described with reference to the drawings.
FIG. 6 is a side view showing a ship starboard of a liquefied fuel transport ship as an example of the ship. This liquefied fuel transport ship is a MOSS type liquefied natural gas transport ship (hereinafter referred to as “LNG transport ship”), and in order from the front in the direction of travel in the longitudinal direction (length direction) of the hull, Part, stern part.

The illustrated LNG transport ship 1 is provided with a spherical LNG tank (liquefied fuel tank) 2 in the center of the hull. The three LNG tanks 2 are installed in series in the longitudinal direction of the hull of the LNG transport ship 1, but the shape, installation position, and quantity thereof are not particularly limited. A hold space 3 is provided below the LNG tank 2 as a safety structure.
Further, the stern part of the LNG transport ship 1 is provided with a residential area 4 including a steering room and a crew room, and an engine room 10 in which main facilities necessary for ship operation are installed.

As described above, the LNG transport ship 1 has the spherical LNG tank 2, and the partition between the LNG tank 2 and the engine room 10, that is, between the hold space 3 and the engine room 10, is partitioned. Yes.
In the illustrated LNG transport ship 1, as shown in FIGS. 1 and 2, a ship bottom deck 12, a first deck 13, and a second deck 14 are provided in a bottom 5 of the engine room 10 provided below the residential area 4. It is provided in order from the side. In FIG. 1, reference numeral 15 in the drawing is a propeller, and 16 is a rudder.

  As main equipment installed in the engine room 10, for example, there are a main engine 16, a ballast pump 17, and a ballast water treatment device 30, which are installed on the bottom deck 12 of a ship navigation drive source. In addition, various mechanical facilities (not shown) such as power generation facilities for electric power used in the LNG ship 1 are installed in the engine room 10.

The ballast pump 17 is a pump for sucking or discharging ballast water such as seawater simultaneously with the progress of cargo handling with respect to a ballast tank (not shown). That is, the ballast pump 17 is a pump for sucking and discharging ballast water loaded in the ballast tank for the purpose of controlling the attitude of the hull and ensuring stability. In the illustrated configuration example, the pair of left and right ballast pumps 17 are provided, but there is no particular limitation, for example, a configuration in which a spare pump is added.
In addition, the ballast tank is provided using space parts, such as the hold space 3, etc., for example, and the ballast tank is installed in the shore side and ship bottom of a ship.

  The ballast water treatment device 30 is a device that removes or kills various microorganisms contained in the ballast water. That is, the ballast water treatment device 30 removes or kills microorganisms contained in the ballast water since the ballast water taken into the ballast tank is drained as the cargo load increases according to the state of the load. It is a device to prevent the microorganisms that live around the intake port from being drained to other sea areas and affecting the ecosystem, so that it can be drained in a wet state.

The illustrated ballast water treatment apparatus 30 includes a filter unit 31 and a treatment unit 32 as an example, and is connected to the discharge-side piping 33 of each ballast pump 17 so as to be installed in a pair on the left and right. In addition, although the present Example demonstrated by the example provided with the filter unit 31 and the process unit 32, there is a thing which is not equipped with a filter depending on the system of a ballast water treatment apparatus. In any case, it is preferable to carry in the ballast water treatment apparatus as a unit.
One filter unit 31 is a device that physically removes a solid substance larger than a predetermined particle diameter on the upstream side of the processing unit 32 from the ballast water sucked and discharged by the ballast pump 17. Further, the processing unit 32 installed on the downstream side of the filter unit 31 is an apparatus for killing various microorganisms in the ballast water sucked and discharged by the ballast pump 17 with a medicine or the like.

The filter unit 31 and the treatment unit 32 are connected by a ballast water treatment pipe 34. Then, the ballast water that has been subjected to the process of removing or killing microorganisms in the processing unit 32 is supplied to the ballast tank through the ballast water supply pipe 35. The illustrated ballast water treatment device 30 exemplifies a piping system or the like that kills the ballast water absorbed by the ballast pump 17 and supplies the ballast water to the ballast tank. It is also possible to drain the ballast water in the ballast tank into seawater.
That is, two sets of ballast water systems in which the ballast pump 17, the filter unit 31, and the processing unit 32 are piped in series are installed in the engine room 10.

  In such an LNG transport ship 1, the treatment unit 32 of the ballast water treatment device 30 is disposed on the shore side of the ballast pump 17, and the filter unit of the ballast water treatment device 30 is interposed between the ballast pump 17 and the partition wall 11. 31 is arranged. That is, it is desirable to arrange the processing unit 32 on the outer side in the ship width direction of the ballast pump 17 and arrange the filter unit 31 on the bow side of the ballast pump 17.

With such an arrangement of the ballast water treatment device 30, the ballast water treatment device 30 can be efficiently installed in the vicinity of the ballast pump 17 with a minimum piping distance. That is, the length of the ballast water treatment pipe 34 and the pressure loss associated with the installation of the ballast water treatment apparatus 30 can be minimized.
For example, in the case of a new ship, if the partition 11 is moved to the LNG tank 2 side to secure the installation space for the ballast water treatment device 30, the piping length and pressure loss associated with the installation of the ballast water treatment device 30 Can be minimized. In the present embodiment, the seawater intake on the bottom of the ship (not shown) is in the vicinity of the ballast pump 17, but the position of the ballast pump 17 may be changed by extending piping from the seawater intake.

In addition, when the ballast water treatment device 30 is additionally installed on the service vessel, if the bulkhead 11 can be modified, a treatment unit 32 is installed on the shore side of the ballast pump 17, and the space between the ballast pump 17 and the bulkhead 11 is installed. It is preferable to install the filter unit 31 in the center.
In this case, the filter unit 31 is preferably disposed in a partition wall portion extending downward from the stern side of the LNG tank 2 as the rearmost part, as in an engine room 10A shown in FIG. 3 as another embodiment, for example.

More specifically, the lower end wall portion 11a corresponding to the lower portion of the partition wall 11 is partially separated and moved to the bow side, and the lower end portion of the partition wall 11 and the upper end portion of the lower end wall portion 11a are connected to the ceiling wall portion 11b. Connect with As a result, in the engine room 10A, an engine room expansion part 18 serving as a partition wall part is formed so that the lower end side of the partition wall 11 protrudes toward the hold space 3A.
For this reason, the filter unit 31 can be installed by using the recessed space formed in the engine room 10A. That is, the filter unit 31 that is desirably disposed between the ballast pump 17 and the partition wall 11 in the engine room 10 </ b> A can be easily installed using the engine room expansion unit 18.

In this case, the engine room expansion part 18 is formed in a part of the lower part in the vertical direction of the bulkhead 11 (for example, between the bottom deck 12 and the first deck 13). The engine room expansion part 18 may be used, or the engine room expansion part 18 may be a recessed part in which only necessary portions are partially moved to the bow side.
The engine room extension 18 not only facilitates the installation of the filter unit 31, but also increases the degree of freedom in the installation of the treatment unit 32 and the handling of the ballast water treatment pipe 34, etc. Facilitates additional installation.

The engine room expansion unit 18 described above uses a space that is not effectively used in the MOSS type LNG transport ship 1. This space is an unused space in the hold space 3 that exists below the stern side because the LNG tank 2 has a spherical shape.
For this reason, the formation of the engine room expansion section 18 is an efficient ballast water treatment device that effectively uses unused space without substantially changing the basic structure of the LNG transport ship 1 and the arrangement of equipment. Since 30 can be additionally installed, the formation of the engine expansion portion 18 is an effective installation structure of the ballast water treatment device 30 for both in-service vessels and new ships.

When the ballast water treatment device 30 is additionally installed on the in-service ship (existing ship) of the LNG transport ship 1 described above, there is a method described below as a suitable remodeling method.
That is, in the remodeling method of the LNG transport ship 1 including the spherical LNG tank 2 and the partition wall 11 that partitions the LNG tank 2 and the engine room 10, as shown in FIG. 1 and FIG. As a process, the carry-in opening 20 of the ballast water treatment device 30 is provided in the outer plate 6 on the heel side of the engine room 10. The carry-in opening 20 determines the width dimension W and the height dimension H that can be carried in for each unit in consideration of the outer diameter dimensions of the filter unit 31 and the treatment unit 32 constituting the ballast water treatment apparatus 30.

  Moreover, it is desirable that the ballast water treatment device 30 is assembled on the ground and unitized (integrated or divided into about 2 to 3), for example, like the filter unit 31 and the treatment unit 32. However, depending on the structure of the LNG transport ship 1 and the like, the filter unit 31 and the processing unit 32 may be disassembled so as to be able to be carried in.

The carry-in opening 20 shown in FIGS. 1 and 2 is provided at a position closer to the engine room 10 than the partition wall 11. That is, the carry-in opening 20 is applied to the LNG transport ship 1 having a structure in which the engine room 10 and the hold space 3 are partitioned by the partition wall 11 without the engine room expansion part 18.
Further, the carry-in opening 20A shown in FIG. 4 is applied to the LNG transport ship 1A having a structure in which the engine room 10A and the hold space 3A are partitioned by the partition wall 11 in which the engine room expansion part 18 is formed. 11 on the bow side. In addition, the code | symbol A in a figure has shown the stand of LNG transport ship 1A.
The illustrated loading opening 20 is provided in the starboard side outer plate 6, but may be provided in the starboard side outer plate 6.

In the next second step, the processing unit 32 and the filter unit 31 of the ballast water treatment device 30 are sequentially carried in from the carry-in opening 20. In the illustrated configuration example, since the carry-in opening 20 is provided in the outer shell 6 on the starboard side, first, the treatment unit 32 and the filter unit 31 of the ballast water treatment device 30 installed on the starboard side are carried in order, Subsequently, the filter unit 31 and the treatment unit 32 of the ballast water treatment device 30 installed on the starboard side are carried in order.
In this case, when the filter unit 31 and the processing unit 32 are carried in, as shown in FIG. 5, for example, the two cranes 40 are used to transport the filter unit 31 and the processing unit 32 to the vicinity of the carry-in opening 20.
When the filter unit 31 and the processing unit 32 are carried into the engine room 10, each unit is suspended by the crane 40, and is indexed from the engine room 10 side with a tensile suspension such as a chain block. In the state of being hung at, it is moved to a predetermined position in the engine room 10 and the tension hanger is loosened and seated at a predetermined position.
Further, as indicated by an imaginary line in the figure, a carriage B provided with a plurality of rotating horizontal rolls C is provided in the vicinity of the carry-in opening 20, and each unit is moved horizontally on the carriage B and carried into the engine room 10. May be.

  In the next third step, the processing unit 32 is disposed on the heel side of the ballast pump 17 installed in the engine room 10, and the filter unit 31 is disposed between the ballast pump 17 and the partition wall 11. At this time, the filter unit 31 and the processing unit 32 transported to the carry-in opening 20 by the crane 40 are transported to a predetermined installation position using transport means such as an inboard crane (not shown) and fixedly installed by anchor bolts or the like.

  In the next fourth step, the ballast pump 17 and the filter unit 31 are connected by a discharge side pipe 33, and the filter unit 31 and the processing unit 32 are connected by a ballast water treatment pipe 34, respectively. In addition, the ballast water supply pipe 35 is connected to the treatment unit 32 and necessary electrical / instrumentation work is performed, whereby the modification for installing the ballast water treatment device 30 is completed.

  According to such a remodeling method of the LNG transport ship (liquefied fuel transport ship) 1, the remodeling is performed in the procedure from the first process to the fourth process described above. The ballast water treatment device 30 is mounted in a narrow ship, and the inboard work of the remodeling work for installing the ballast water treatment device 30 at a predetermined position in the engine room 10 can be easily performed. Therefore, in the remodeling work in which the ballast water treatment device 30 is additionally installed in the existing LNG transport ship 1, the construction period can be shortened by effectively using the carry-in opening 20.

And since the ballast water treatment apparatus 30 can be easily installed in the vicinity of the ballast pump 17 by performing the remodeling method described above, the discharge-side pipe 33 and the ballast water treatment pipe associated with the installation of the ballast water treatment apparatus 30. 34 and the ballast water supply pipe 35 can be prevented from increasing in length. Moreover, since the increase in the length of the ballast water can be minimized by suppressing the increase in the pipe length, the existing ballast pump 17 can be easily diverted, and the increase in power required for the operation of the ballast pump 17 is also suppressed. it can.
In addition, since the ballast water treatment device 30 is installed in the engine room 10 that is partitioned by the partition wall 11 and does not have LNG, it is possible to use a ballast water treatment device in which the electrical / instrumentation equipment has a non-explosion-proof specification. This is also advantageous in terms of cost.

  On the other hand, in the remodeling method of the LNG transport ship 1A including the spherical LNG tank 2 and the partition wall 11 that partitions the hold space 3A in which the LNG tank 2 is installed and the engine room 10A, the LNG tank 2 The partition wall 11 is extended to a position below the stern, and the ballast water treatment device 30 is installed in the extended portion.

  That is, in a service ship such as the LNG transport ship 1A that does not have sufficient space for installing the ballast water treatment device 30 in the engine room 10A, the bulkhead 11 is partially moved to the bow side to the stern lower position of the LNG tank 2, The engine room expansion part 18 mentioned above is formed. The engine room expansion part 18 becomes an extension part of the partition wall 11, and the engine room 10 </ b> A is enlarged by the extension part, so that the ballast water treatment device 30 can be installed in the engine room extension part 18.

With such a remodeling method, the ballast water treatment device 30 is installed in the engine room expansion section 18, so that the unused space formed in the lower part of the spherical LNG tank 2 can be used effectively to provide ballast water. The processing device 30 can be installed in the vicinity of the ballast pump 17. More specifically, the unused space unique to the MOSS type LNG transport ship 1A can be effectively utilized, and the ballast water treatment device 30 can be installed in the vicinity of the ballast pump 17.
Even with such a modification method, it is possible to suppress an increase in piping length and pressure loss due to the additional installation of the ballast water treatment device 30, and to install the non-explosion-proof ballast water treatment device 30.

In the embodiment described above, an example of application to the LNG ship 1 has been described as an example of a ship. However, the present invention can be similarly applied to a liquefied fuel transport ship such as an LPG ship.
Further, in other embodiments, as described below, the present invention can be similarly applied to a ship such as a cargo ship. In this case, the hold space 3 in FIGS. 1 and 2 may be read as a ship.

When the ship is a cargo ship, like the LNG ship 1, a partition 11 separates a vessel (not shown) on which a load is loaded and an engine room 10. A ballast pump 17 is installed in the engine room 10.
Also in such a cargo ship, the processing unit 32 of the ballast water treatment device 30 is arranged on the shore side of the ballast pump 17, and the filter unit 31 of the ballast water treatment device 30 is further interposed between the ballast pump 17 and the partition wall 11. Deploy.

  In such a cargo ship, since the ballast water treatment device 30 is disposed in the engine room 10 in which the ballast pump 17 is installed, the ballast water treatment device 30 is installed in the vicinity of the ballast pump 17, so that the pipe length And pressure loss can be minimized. That is, by moving the partition wall 11 toward the ship side and securing the installation space for the ballast water treatment device 30, it is possible to minimize the increase in pipe length and pressure loss associated with the installation of the ballast water treatment device 30. Can do.

In addition, when a ballast water treatment device 30 is additionally installed in a service ship, a processing unit 32 is installed on the far side of the ballast pump 17 if possible due to modification of the partition wall 11. It is preferable to install a filter unit 31 between 17 and the partition wall 11.
In this case, the filter unit 31 is preferably disposed in a partition wall extending downward from the stern side of the boat.

More specifically, as shown in FIG. 3, for example, the lower end wall portion 11a corresponding to the lower portion of the partition wall 11 is partially separated and moved toward the ship (bow) side. The upper end part of the part 11a is connected by the ceiling wall part 11b. In this case, the hold space 3A in FIG.
As a result, in the engine room 10A, an engine room expansion part 18 serving as a partition wall part is formed so that the lower end side of the partition wall 11 protrudes toward the ship side.

  For this reason, the filter unit 31 can be installed by using the engine room expansion part 18 in the recessed space formed in the engine room 10A. That is, the filter unit 31 that is desirably disposed between the ballast pump 17 and the partition wall 11 in the engine room 10A can be easily installed by using the engine room expansion portion 18, and therefore, in a cargo ship, Reduction of the loading space of the ship accompanying the installation of the water treatment device 30 can be minimized.

In addition, when the ballast water treatment device 30 is additionally installed in the in-service cargo ship (existing ship) described above, there is a method described below as a suitable remodeling method.
That is, in the method of remodeling a cargo ship provided with the partition wall 11 that partitions the ship and the engine room 10, as shown in FIG. 1 and FIG. 2, as shown in FIGS. 6 is provided with a carry-in opening 20 of the ballast water treatment device 30. The carry-in opening 20 determines the width dimension W and the height dimension H that can be carried in for each unit in consideration of the outer diameter dimensions of the filter unit 31 and the treatment unit 32 constituting the ballast water treatment apparatus 30. Depending on the structure of the LNG transport ship 1 and the like, the filter unit 31 and the processing unit 32 may be disassembled to have a size that can be carried in.

The carry-in opening 20 shown in FIGS. 1 and 2 is provided at a position closer to the engine room 10 than the partition wall 11. That is, the carry-in opening 20 is applied to a cargo ship having a structure in which the engine room 10 and the ship are partitioned by the partition wall 11 without the engine room expansion part 18.
Further, the carry-in opening 20A shown in FIG. 4 is applied to a cargo ship having a structure in which an engine room 10A and a ship are partitioned by a partition wall 11 forming an engine room expansion part 18, and a ship ( It is provided on the bow side.

  In the next second step, the processing unit 32 and the filter unit 31 of the ballast water treatment device 30 are sequentially carried in from the carry-in opening 20. In this case, the loading order and loading procedure of the processing unit 32 and the filter unit 31 are the same as those of the LNG ship 1 described above.

In the next third step, as in the case of the LNG ship 1, the processing unit 32 is disposed on the far side of the ballast pump 17 installed in the engine room 10, and the filter unit 31 is interposed between the ballast pump 17 and the partition wall 11. Are arranged respectively.
In the next fourth step, the ballast pump 17 and the filter unit 31 are connected by a discharge side pipe 33, and the filter unit 31 and the processing unit 32 are connected by a ballast water treatment pipe 34, respectively. In addition, the ballast water supply pipe 35 is connected to the treatment unit 32 and necessary electrical / instrumentation work is performed, whereby the modification for installing the ballast water treatment device 30 is completed.
Thereafter, the opening outer plate obtained by opening the carry-in opening 20 is welded to the carry-in opening 20. At this time, the hinge may be fixed by welding across the cutting line before the carry-in opening 20 is provided, and the opening outer plate may be opened in a hinge door manner.

  According to such a method for remodeling a cargo ship, since the remodeling is performed by the procedure from the first process to the fourth process described above, the ballast water treatment device 30 is installed in the narrow ship of the in-service ship where all the devices are already installed. And the inboard work of the remodeling work for installing the ballast water treatment device 30 at a predetermined position in the engine room 10 can be easily performed. Therefore, in the remodeling work for additionally installing the ballast water treatment device 30 on the existing cargo ship, the construction period can be shortened by the effective use of the carry-in opening 20.

  Moreover, since the ballast water treatment apparatus 30 can be easily installed in the vicinity of the ballast pump 17 by performing the remodeling method described above, an increase in the pipe length associated with the installation of the ballast water treatment apparatus 30 can be suppressed. Moreover, since the increase in the length of the ballast water can be minimized by suppressing the increase in the pipe length, the existing ballast pump 17 can be easily diverted, and the increase in power required for the operation of the ballast pump 17 is also suppressed. it can.

As described above, according to the above-described liquefied fuel transport ship and ship remodeling method, ship, and liquefied fuel transport ship ship according to the present embodiment, a new ship is built for a wide variety of ships such as cargo ships and liquefied fuel transport ships. In addition, various ballast water treatment devices 30 can be efficiently and easily installed regardless of the service vessel. And since the ballast water treatment apparatus 30 can be installed in the vicinity of the ballast pump 17, the increase in the amount of piping and the pressure loss accompanying installation of the ballast water treatment apparatus 30 can be suppressed.
Further, in a ship such as the LNG ship 1 that transports dangerous materials, the non-explosion-proof ballast water treatment device 30 can be installed on the engine room 10 side of the partition wall 11, which is advantageous in terms of cost.

Furthermore, since existing service vessels are provided with the carry-in openings 20 and 20A and the ballast water treatment device 30 is installed, the work in a narrow ship becomes easy and the construction period required for remodeling can be shortened.
In addition, this invention is not limited to embodiment mentioned above, In the range which does not deviate from the summary, it can change suitably.

1,1A Liquefied natural gas (LNG) transport ship 2 LNG tank (liquefied fuel tank)
3, 3A Hold space 5 Ship bottom 6 Outer plate part 10, 10A Engine room 11 Bulkhead 11a Lower end bulkhead 11b Ceiling wall part 12 Ship bottom deck 16 Main engine 17 Ballast pump 18 Engine room expansion part 20, 20A Carry-in opening part 30 Ballast water treatment device 31 Filter unit 32 Treatment unit 33 Discharge side piping 34 Ballast water treatment piping 35 Ballast water supply piping 40 Crane

Claims (8)

In a method for remodeling a liquefied fuel transportation ship comprising a spherical liquefied fuel rod and a partition wall that partitions the liquefied fuel rod and the engine room,
A carry-in opening of the ballast water treatment device is provided in the outer plate on the heel side of the engine room,
Next, carry in the treatment unit of the ballast water treatment device from the carry-in opening,
Next, the processing unit is disposed on the bow side or the berth side of the ballast pump installed in the engine room,
Next, a method for remodeling a liquefied fuel transport ship, characterized in that piping between the ballast pump and the processing unit is performed, and existing ballast water piping and processing unit side piping are connected. In a method for remodeling a liquefied fuel transportation ship comprising a spherical liquefied fuel rod and a partition wall that partitions the liquefied fuel rod and the engine room,
A carry-in opening of the ballast water treatment device is provided in the outer plate on the heel side of the engine room,
Next, carry in the treatment unit and the filter unit of the ballast water treatment device from the carry-in opening,
Next, the processing unit is disposed on the shipowner side or the anchor side of the ballast pump installed in the engine room, and the filter unit is disposed between the ballast pump and the partition wall,
Next, the ballast pump and the filter unit, and the filter unit and the processing unit are respectively piped, and the existing ballast water pipe and the unit side pipe are connected to each other. Remodeling method. In a method for remodeling a liquefied fuel transportation ship comprising a spherical liquefied fuel rod and a partition wall that partitions the liquefied fuel rod and the engine room,
A method for remodeling a liquefied fuel transport ship, wherein the partition wall is extended to a position below the stern of the liquefied fuel tank and a ballast water treatment device is installed in the extended portion. In a method for remodeling a ship equipped with a ship or residence area and an engine room,
A carry-in opening of the ballast water treatment device is provided on the outer side plate of the engine room,
Next, the ballast water treatment device is suspended from the carry-in opening, and carried to a predetermined position in the engine room,
Next, a ship remodeling method characterized in that the suspension is loosened, the ballast water treatment apparatus is disposed at a predetermined position in the engine room, and the existing ballast water pipe and the ballast water treatment apparatus side pipe are connected. In a ship provided with a ballast pump in the engine room, a partition wall that partitions the ship or residence side and the engine room,
A marine vessel wherein a processing unit of a ballast water treatment device is disposed on a bow side or a berth side of the ballast pump, and a filter unit of the ballast water treatment device is disposed between the ballast pump and the partition.   The ship according to claim 5, wherein the filter unit of the ballast water treatment device is disposed in a partition wall portion that extends below the stern side of the boat or the residential area. In a liquefied fuel transportation ship equipped with a spherical liquefied fuel tank, a partition partitioning between the liquefied fuel tank and the engine room, and a ballast pump in the engine room,
A liquefied fuel transport ship, wherein a processing unit of a ballast water treatment device is disposed on the shore side of the ballast pump, and a filter unit of the ballast water treatment device is disposed between the ballast pump and the partition wall. The liquefied fuel transport ship according to claim 7, wherein the filter unit is disposed in a partition wall portion that extends downward from the stern side of the liquefied fuel tank that is the last.

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