JP2008105448A - Ship and fuel supply method to ship - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ship easy in loading NGH as fuel of the ship, and a fuel supply method to the ship. <P>SOLUTION: This ship 10 is anchored in a port, and a gangway 12 capable of passing a lorry car 11 between a ship deck and the port, is installed on the ship 10. The lorry car 11 has an NGH tank 13 loaded with the NGH. The NGH tank 13 can be separated from a trailer part 14 of the lorry car 11, and the separated NGH tank 13 can be used as a fuel tank of the ship. A fuel room 16 being an installation space of the NGH tank 13 is arranged in a lower part of a cabin 15 of the ship 10. A tank slot 17 capable of storing one NGH tank 13 is arranged in a plurality in the fuel room 16, and these tank slots 17 can rotate like a multistory parking space. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a ship and a method of supplying fuel to the ship.

Conventionally, a diesel engine has been adopted as a main engine of a ship, and heavy oil is used as its fuel. However, since air pollutants such as CO ₂ , NOx, and SOx are discharged, it is necessary to suppress it. Control and capital investment (low speed operation, adoption of high efficiency engine and low exhaust gas engine, etc.) are required. In addition, if heavy fuel oil leaks to the sea due to collision or grounding, serious environmental destruction may occur. Therefore, natural gas energy has attracted attention as a fuel from the consideration of the global environment (see Non-Patent Document 1).

  As natural gas energy, liquefied natural gas (LNG) is well known, but since LNG is produced and stored at an extremely low temperature of −162 ° C., it has a problem that it is very difficult to handle. Further, there is a problem that LNG is evaporated little by little due to a rise in the temperature of the tank and a large amount of boil-off gas is generated. In particular, when the ship does not move for 2 to 3 days, the pressure inside the tank becomes very high, so it is necessary to remove the boil-off gas by burning in a boiler, etc., and consuming fuel unnecessarily. As a result, the cost increases.

Therefore, recently, NGH has attracted attention as a new natural gas energy (see Non-Patent Document 1). NGH is a clathrate hydrate in which natural gas molecules (guests) mainly composed of methane, ethane, propane and the like are incorporated into a cluster of water molecules, and is about 170 under an atmospheric pressure environment of −20 ° C. Since it can contain twice as much gas, it has many advantages over LNG in terms of the entire system of manufacturing, transportation, storage, and gasification. NGH is also attracting attention as clean energy because it emits less carbon dioxide and air pollutants than gasoline.
JP 2006-8228 A Mitsui Engineering & Shipbuilding Co., Ltd., “Natural Gas Hydrate (NGH)-Mitsui Engineering & Shipbuilding”, [online], [October 23, 2006 search], Internet <URL: http://www.mes.co.jp/mes_technology /ngh.html>

  However, since NGH is handled in a pellet-like solid state in a low temperature environment of −20 ° C., there is a problem that it is difficult to directly fill NGH pellets into a fuel tank installed in a ship. Moreover, after a part of NGH dissolves due to a rise in outside air temperature or a deterioration in transportation conditions, it is solidified again by the cold heat held by the entire NGH, so that it sticks to the piping and supply container, causing trouble in the supply of NGH. There is a fear.

  Accordingly, an object of the present invention is to provide a ship that can easily load NGH as fuel for the ship and a method for supplying fuel to the ship.

  The above object of the present invention is to provide a hull capable of boarding a lorry vehicle equipped with a fuel tank, a fuel room which is an inboard installation space of the fuel tank separated from the lorry vehicle, and a fuel system to which the fuel tank is connected. It is achieved by a ship characterized by comprising: The fuel in this case is preferably NGH.

  The above-mentioned object of the present invention also includes a step of boarding a lorry vehicle equipped with a fuel tank separable from the trailer unit together with the lorry vehicle, and the fuel tank from the trailer unit in a predetermined fuel room provided in the ship. It is also achieved by a method for supplying fuel to a ship, comprising the steps of separating and fixing at the position and connecting the fuel tank to a fuel system in a ship, and dismounting the trailer part of the lorry vehicle. Is done.

  In the present invention, the fuel room has a plurality of tank slots capable of accommodating one fuel tank, and has a rotation mechanism capable of rotating each tank slot, and is accommodated in one of the tank slots on the ship. It is preferable that the fuel tank is configured to be movable to the bottom of the ship. Moreover, it is preferable that the said fuel room is provided in the cabin lower part.

  In the present invention, it is preferable that the fuel tank is carried into a tank slot and connected to the fuel system as the lorry vehicle moves backward.

  In the present invention, it is preferable to use the bridge attached to the ship to get on and off the lorry vehicle. Here, it is particularly preferable that one of the two bridges attached to the ship is used to board the lorry vehicle, and the other bridge is used to disembark the lorry vehicle.

  Thus, according to the present invention, it is possible to provide a ship that can easily load NGH as fuel for the ship and a method for supplying fuel to the ship.

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

  FIG. 1 is a schematic view for explaining a fuel supply method to a ship according to a preferred embodiment of the present invention.

  As shown in FIG. 1, the ship 10 has a hull structure into which a vehicle such as a lorry vehicle 11 can enter. The ship 10 anchored at the port is provided with a bridge 12 through which a lorry vehicle 11 can pass between the ship deck and the port. As shown in the figure, as the bridge 12, it is preferable to prepare two bridges 12A for an ascending lorry vehicle 11A and a descending bridge 12B for a lorry vehicle 11B to be disembarked. These bridges 12A , 12B are preferably movable in accordance with the draft of the ship 10.

  The lorry vehicle 11 includes a tank (NGH tank) 13 loaded with NGH. The NGH tank 13 can be separated from the vehicle main body (trailer part) 14 of the lorry vehicle 11, and the separated NGH tank 13 is used as a fuel tank for a ship. The NGH tank 13 of the lorry vehicle 11 is preferably of the same shape according to a certain standard, and is preferably provided with a gasifier for gasifying NGH. Moreover, it is preferable that the NGH tank 13 is provided with a measuring device that measures the amount of gas used. This measuring device preferably has a function of constantly measuring the flow rate of the gas flowing through the socket portion and measuring the remaining amount of NGH in the tank, the tank internal pressure, and the tank internal temperature. With these functions, it is possible to detect a gas leak in the NGH tank 13.

  In the present embodiment, a fuel room 16 that is an installation space for the NGH tank 13 is provided below the cabin 15 of the ship 10. A plurality of tank slots 17 capable of accommodating one NGH tank 13 are provided in the fuel room 16, and these tank slots 17 can be rotated like a multilevel parking lot.

  When the NGH tank 13 is set in the tank slot 17, the lorry vehicle 11 (11C) that has entered the shipboard deck is moved backward toward the fuel room 16, and the NGH tank is placed in the empty tank slot 17 appearing on the shipboard deck. After carrying in, the NGH tank 13 is separated from the trailer part 14 of the lorry vehicle 11. At this time, it is preferable that the NGH tank 13 is automatically connected to the fuel system in the ship. Thereafter, the trailer unit 14 of the lorry vehicle 11 can be dismounted from the descending bridge 12B as illustrated.

  FIG. 2 is a schematic front view showing the configuration of the fuel room 16.

  As shown in FIG. 2, the fuel room 16 is provided in a range from the ship deck 18a to the ship bottom 18b, and has a rotation mechanism capable of moving each tank slot 17 in the direction indicated by the arrow. Yes. Therefore, the NGH tank 13 that is transported to the ship deck 18a by the lorry vehicle 11 and set in the empty tank slot 17 of the ship deck 18a can be sent to the ship bottom 18b. Thus, by providing the fuel room 16 at the lower part of the cabin 15, the space below the cabin in the ship can be used effectively. The tank slot 17 does not have to completely fit the entire NGH tank. For example, the tank slot 17 may protrude slightly in the longitudinal direction.

  FIG. 3 is a schematic diagram illustrating the NGH tank carry-in procedure more specifically.

  In order to load NGH into the ship 10, it is first necessary to take out an empty NGH tank from the fuel room 16 (FIG. 3A). Therefore, an operation is carried out in which the lorry vehicle 11 consisting only of the trailer part 14 to which the NGH tank 13 is not connected is mounted, moved to the fuel room 16 of the onboard deck 18a, and at least one empty NGH tank is taken out from the fuel room 16. (FIG. 3B). Next, each tank slot 17 in the fuel room 16 is rotated by one slot (FIG. 3C). As a result, an empty NGH tank that has existed in the ship until now appears on the shipboard deck 18a.

  Next, the lorry vehicle 11 equipped with the NGH tank 13 filled with the NGH pellets is put on board, the lorry vehicle 11 is moved backward into the empty tank slot 17, and then the NGH tank 13 is cut off at that position (FIG. 3 (d)). ). Thus, a full tank of NGH is set in the empty tank slot 17 of the shipboard deck (FIG. 3 (e)). After that, the lorry vehicle 11 which has finished carrying in the full NGH tank carries out an empty NGH tank next to the set NGH tank (FIG. 3E). That is, after the empty NGH tank 13 is connected to the trailer portion 14 of the lorry vehicle 11, the vehicle goes down to the port through the down bridge 12B, which is a bridge different from the up bridge 12A used when boarding the ship. . However, it goes without saying that in some cases, the vehicle may go down through the upward bridge 12A.

  Thereafter, by repeating the steps shown in FIGS. 3C to 3E, the full tanks 13 are set in all the empty tank slots 17 (FIG. 3F).

  FIG. 4 is a schematic side view schematically showing a state in which the NGH tank 13 is set in the tank slot 17.

  As shown in FIG. 4, the NGH tank 13 is carried into the tank slot 17 with the tire portion 13b provided. The fuel discharge port 13a of the NGH tank 13 is connected to the fuel system connection portion 21 in the tank slot 17, and the NGH tank 13 directly serves as a fuel tank for the ship. In particular, the fuel discharge port 13a of the NGH tank 13 has a socket structure that automatically couples with the connection portion 21 of the fuel system when the lorry vehicle 11 is moved backward to a predetermined position.

  As the socket structure, for example, as known in the cylinder connection port of a tabletop gas stove, each connection port is deeply connected to a predetermined position while absorbing a rough shaft shake by a conical male / female connection port. A structure that is locked at a time can be employed. It also has a flange provided at each connection port, an electromagnet provided at the rim of the flange, and a sensor that detects the proximity of the connection port, and turns on the electromagnet when the proximity of the connection port is detected by the sensor. It may be a socket structure in which the flange surfaces are joined together by electromagnetic force. Moreover, it is good also as a socket structure which controls the lock | rock of a socket by raising / lowering a lock pin, when the proximity of a connection port is detected by the sensor. The socket structure is provided at a position where there is no possibility that water obtained with NGH gasification is discharged, and the generated gas hardly remains in the NGH tank 13 and can be efficiently ejected. is required.

  The NGH tank 13 placed in the tank slot 17 is fixed by sandwiching the tire portion 13b of the NGH tank 13 by the fixing device 17a in order to stabilize the position. This fixing method is not particularly limited, and various fixing methods are conceivable.

  As described above, according to the present embodiment, since the NGH tank 13 carried by the lorry vehicle 11 is used as it is as a fuel tank of the ship 10, it is not necessary to always provide a large fuel tank in the ship. Not only can it take up a lot of space, but also maintenance of the fuel tank is not necessary, and the construction cost of the ship can be reduced. In addition, a fuel supply line (loading arm) for supplying fuel from the harbor facility to the fuel tank in the ship is not required, and the working time for replenishing fuel can be shortened and the amount of purge gas can be reduced.

  Further, according to the present embodiment, the lorry vehicle 11 that can detach the NGH tank 13 is used to board the lorry vehicle 11 together with the lorry vehicle 11, the NGH tank 13 is disconnected at a predetermined position in the ship, and the trailer unit 14 is dismounted. Therefore, the limited space in the ship can be used effectively.

  In addition, according to the present embodiment, the fuel room 16 is provided in the lower part of the cabin 15, and the lorry vehicle 11 provided with the NGH tank 13 is carried together with the lorry vehicle 11 and carried to the fuel room 16. The lower space of the cabin 15 of the ship 10 that has not been used much can be used effectively.

  Moreover, according to this embodiment, since the lorry vehicle 11 is directly boarded using the bridge 12, it is possible to load in any place in the ship as compared with the case of loading and unloading the NGH tank with a port crane or the like. The loading / unloading operation of the NGH tank 13 can be performed in a short time. Further, even if the ship is not provided with a vehicle uppering mechanism, it is possible to use the LGH regardless of the structure of the ship because the lorry 11 can be boarded only by installing the bridge 12.

  The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention, and these are also included in the scope of the present invention. Needless to say.

  For example, in the above embodiment, the case where the NGH tank is connected with the onboard deck has been described. However, the present invention is not limited to such a case, and the NGH tank is carried in / out at the center of the slot or at the lowest level. It is also possible to do.

  In the above embodiment, a case has been described in which the NGH tank 13 having a socket structure that automatically couples to the fuel system connection portion 21 when the lorry vehicle 11 is moved backward to a predetermined position is automatically connected. The present invention is not limited to such a case, and may be a manual pipe connection by a driver of a lorry vehicle or a dedicated worker.

  Moreover, in the said embodiment, although the gasifier is attached to the NGH tank 13, the gasifier may be provided not on the NGH tank 13 but on the ship side. In this case, the NGH pellet in the NGH tank 13 is sent to the gasifier through a pipe connected through a socket structure. Since the NGH pellet is a substantially spherical body, it may be fed by falling under its own weight or by a screw feeder. If necessary, it is preferable to prevent clogging of the NGH pellets using a vibrator.

  Moreover, in the said embodiment, although two bridges for going up and going down are provided, as above-mentioned, you may use it for both going up and going down using one bridge. Moreover, the ship by which a part of ship body becomes a bridge by opening a ship body rear part or a side part like a ferry or a RORO ship may be sufficient.

  In the above embodiment, a lorry vehicle including an NGH tank is taken as an example. However, a container vehicle that carries a tank container (NGH tank container) packed with NGH may be used. Furthermore, it may be a forklift loaded with NGH tank containers.

  Moreover, in the said embodiment, although NGH was mentioned as an example as a fuel loaded into a ship with a fuel tank aboard a lorry vehicle, this invention is not limited to NGH, It applies to other fuels, such as LNG. It is also possible to do. However, as described above, NGH is preferable to LNG as fuel for such a ship.

FIG. 1 is a schematic view for explaining a fuel supply method to a ship according to a preferred embodiment of the present invention. FIG. 2 is a schematic front view showing the configuration of the fuel room 16. FIG. 3 is a schematic diagram illustrating the NGH tank carry-in procedure more specifically. FIG. 4 is a schematic side view schematically showing a state in which the NGH tank 13 is set in the tank slot 17.

Explanation of symbols

11 Raleigh vehicle 11A Raleigh vehicle (boarding side)
11B Raleigh vehicle (disembarkation side)
12 bridge 12A ascending bridge 12B descending bridge 13 NGH tank 13a fuel outlet 13b tire part 14 trailer part 15 cabin 16 fuel room 17 tank slot 17a fixing device 18a ship deck 18b ship bottom part 21 connection part of fuel system

Claims (8)

  A hull capable of carrying a lorry vehicle equipped with a fuel tank, a fuel room which is an inboard installation space of the fuel tank separated from the lorry vehicle, and a fuel system to which the fuel tank is connected, To ship. A step of placing a lorry vehicle equipped with a fuel tank separable from the trailer part on the ship together with the lorry vehicle;
Separating the fuel tank from the trailer unit in a predetermined fuel room provided in the ship and fixing the fuel tank to the position, and connecting the fuel tank to a fuel system in the ship;
And a step of unloading the trailer part of the lorry vehicle.   The fuel room is provided with a plurality of tank slots capable of accommodating one fuel tank, and has a rotation mechanism capable of rotating each tank slot. The fuel tank accommodated in one of the tank slots on the ship is The fuel supply method for a ship according to claim 2, wherein the fuel supply method is configured to be movable to the bottom.   The method for supplying fuel to a ship according to claim 2 or 3, wherein the fuel room is provided in a lower part of a cabin.   5. The method of supplying fuel to a ship according to claim 2, wherein the fuel tank is carried into the tank slot and connected to the fuel system when the lorry vehicle moves backward. .   The method for supplying fuel to a ship according to any one of claims 2 to 5, wherein the lorry vehicle is mounted and dismounted using a bridge attached to the ship.   The ship according to claim 6, wherein one of the two bridges attached to the ship is used to board the lorry vehicle, and the other bridge is used to unload the lorry car. Fuel supply method.   The method for supplying fuel to a ship according to any one of claims 2 to 7, wherein the fuel is NGH.

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