JP2020133723A - Floating cryogenic liquefied gas filling facility and cryogenic liquefied gas delivery method using the same - Google Patents

Abstract

To provide a floating cryogenic liquefied gas filling facility and a cryogenic liquefied gas delivery method using the same which directly and simultaneously fill containers loaded on a plurality of transportation trucks on land with cryogenic liquefied gas and thereby enabling the cryogenic liquefied gas to be delivered to a place without a cryogenic liquefied gas receiving facility.SOLUTION: A floating cryogenic liquefied gas filling facility 10 which delivers cryogenic liquefied gas from sea to land comprises: a barge tank 12; a hose 13 to transfer the cryogenic liquefied gas from the barge tank to containers 41 loaded on transportation trucks 40 on land; a cryogenic liquefied gas delivery unit 20 which is detachably installed on one end of the hose; a crane 14 which keeps the hose at a predetermined height while transferring the cryogenic liquefied gas; and filling means 15 which fill the containers with the cryogenic liquefied gas. The cryogenic liquefied gas delivery unit has: an inflow port of the cryogenic liquefied gas; a plurality of discharge ports; and an opening-closing valve which selectively opens or closes respective discharge ports.SELECTED DRAWING: Figure 1

Description

The present invention relates to a floating low-temperature liquefied gas filling facility and a low-temperature liquefied gas delivery method using the same, and in particular, directly and simultaneously fills containers arranged on a plurality of transport trucks on the ground. With a floating low-temperature liquefied gas filling facility that enables easy and efficient delivery of low-temperature liquefied gas even in places where there is no low-temperature liquefied gas receiving facility, and a low-temperature liquefied gas delivery method using this. is there.

A country that produces oil and gas in its own country can export the surplus oil and gas after consuming the required amount if it produces more than its own consumption, but it produces oil and gas. If the amount is less than the consumption amount, it will be imported from another country. In this case, liquefied petroleum gas (LPG) and liquefied natural gas (LNG), which have less environmental impact, are desirable as the oil and gas to be purchased as fuel, and liquefied natural gas in particular emits more CO ₂ than petroleum products. It is expected to be distributed in the future because there are few products and the price is low.

The low-temperature liquefied gas liquefied by low temperature is transported by sea on a dedicated large transport ship (LNG carrier). The transported low-temperature liquefied gas is usually transferred to a storage facility that serves as a primary base on the receiving side, and is either transported by land from this storage facility to a storage facility that serves as a secondary base, or gasified by a gasification facility before the pipeline. It is delivered directly to the consumer using it.
In addition, if no storage facility or gasification facility is provided as the primary base on the receiving side, the transported low-temperature liquefied gas will be transferred from the large transport ship to the floating liquefied natural gas storage regasification facility (FSRU) for primary use. Distribution methods such as storage instead of bases or gasification and supply to above-ground pipelines have also been put into practical use.

However, there are only a limited number of ports equipped with large and sufficiently deep port facilities that allow LNG carriers and FSRUs to berth, and areas that are ready to accept low-temperature liquefied gas are limited. Especially in areas dotted with islands and developing areas, it is not realistic to develop such a large dedicated infrastructure in all areas where gas is desired to be used.

Patent Document 1 describes a storage facility for low-temperature liquefied gas on a floating structure, a pump for taking out the low-temperature liquefied gas in the storage facility to the outside of the storage facility and sending it to the supplied side, and vaporizing the low-temperature liquefied gas. To a remote island equipped with a supply facility equipped with a vaporizer that can be sent out as a gas, and a floating transport facility that can supply the low-temperature liquefied gas as a liquid or as a vaporized gas to the supplied side. A low temperature liquefied gas delivery device is disclosed.

According to Patent Document 1, since the floating transport equipment can supply the low-temperature liquefied gas as a liquid or as a vaporized gas, there is an advantage that the equipment on the receiving side does not necessarily include the gasification equipment and the options are increased. However, in the technique of Patent Document 1, it is premised that such a receiving facility is provided at the port that receives the low-temperature liquefied gas.

However, even if it is small, the construction cost of the receiving facility is high, and it cannot be easily constructed at each port that delivers low-temperature liquefied gas. In addition, if the area that requires low-temperature liquefied gas as fuel and the port that delivers low-temperature liquefied gas are separated, it will be necessary to construct a long pipeline in addition to this, which is difficult to realize.
Therefore, even if there is no receiving facility at the port that receives the low-temperature liquefied gas, it is desired to realize a facility and method for easily and efficiently delivering the low-temperature liquefied gas.

JP-A-2009-191860

The present invention has been made in view of the problems in the above-mentioned conventional floating low-temperature liquefied gas filling facility and the low-temperature liquefied gas delivery method using the same, and an object of the present invention is on a plurality of transport trucks on the ground. It is possible to fill the container arranged in the room directly and at the same time with the low-temperature liquefied gas, and it is possible to easily and efficiently deliver the low-temperature liquefied gas even in a place where there is no facility for receiving the low-temperature liquefied gas. It is an object of the present invention to provide a floating low-temperature liquefied gas filling facility and a low-temperature liquefied gas delivery method using the same.

The floating low-temperature liquefied gas filling facility according to the present invention, which is made to achieve the above object, is a floating low-temperature liquefied gas filling facility that delivers low-temperature liquefied gas from the sea to land, and temporarily fills the low-temperature liquefied gas. A hose for transferring the low-temperature liquefied gas from the liquefied gas supply facility to the barge tank, and a hose for transferring the low-temperature liquefied gas from the barge tank to a container arranged on a transport truck on the ground. A low-temperature liquefied gas distribution unit detachably attached to one end of the hose, a crane that holds the hose at a predetermined height during transfer of the low-temperature liquefied gas, and a filling means for filling the container with the low-temperature liquefied gas. The low-temperature liquefied gas distribution unit has an inflow port for low-temperature liquefied gas connected to one end of the hose, a plurality of discharge ports for simultaneously discharging low-temperature liquefied gas to a plurality of the containers, and opening and closing of each discharge port. It is characterized by being provided with an on-off valve that selectively performs the above.

The low-temperature liquefied gas distribution unit is provided with a flow rate detecting means for individually detecting the flow rate of the low-temperature liquefied gas discharged from each discharge port, and is separate from the on-off valve or the on-off valve based on the detected flow rate of the low-temperature liquefied gas. It is preferable that the discharge flow rate of the low-temperature liquefied gas can be individually adjusted by the flow rate adjusting means provided individually.

The low temperature liquefied gas distribution unit further includes a plurality of injection hoses having one end connected to the discharge port and the other end connected to the inlet of the container, and the low temperature liquefied gas is supplied from the barge tank to the hose by the filling means. , It is preferable to transfer directly to one or more of the containers via the low temperature liquefied gas distribution unit.

The low temperature liquefied gas is liquefied natural gas (LNG), the liquefied gas supply facility is a liquefied natural gas ship or a floating liquefied natural gas storage regasification facility (FSRU), and the filling means is a pressurized evaporator or It is preferably a pump.

The low-temperature liquefied gas delivery method according to the present invention, which has been made to achieve the above object, is a low-temperature liquefied gas delivery method using the above-mentioned floating low-temperature liquefied gas filling facility, and is a floating low-temperature liquefied gas filling facility in the liquefied gas supply facility. After mooring, the receiving stage where the low temperature liquefied gas is transferred from the liquefied gas supply facility to the barge tank of the floating low temperature liquefied gas filling facility via a hose, and the floating low temperature liquefied gas filling facility to the delivery place of the low temperature liquefied gas. It has a transport step of moving and a filling step of directly filling a container arranged on a transport truck on the ground from the barge tank via the hose by a filling means, and simultaneously fills a plurality of containers with low temperature. When filling the liquefied gas, it is characterized by further having a connection step for connecting a low temperature liquefied gas distribution unit having a plurality of discharge ports at one end on the discharge side of the hose before the filling step.

The low temperature liquefied gas distribution unit selectively opens and closes an inflow port of the low temperature liquefied gas connected to one end of the hose, a plurality of discharge ports for simultaneously discharging the low temperature liquefied gas to the plurality of containers, and opening and closing of each discharge port. It is provided with an on-off valve to be performed and a flow rate detecting means for individually detecting the flow rate of the low-temperature liquefied gas discharged from each discharge port, and the filling step of the discharge port required according to the number of the containers to be filled at the same time. Discharge of low-temperature liquefied gas by a selection step of selectively opening the on-off valve and a flow rate adjusting means separately provided separately from the on-off valve or the on-off valve based on the flow rate of the low-temperature liquefied gas detected by the flow rate detecting means. It is preferable to include an adjustment step in which the flow rate is individually adjusted.

The low temperature liquefied gas is liquefied natural gas (LNG), the liquefied gas supply facility is a liquefied natural gas ship or a floating liquefied natural gas storage regasification facility (FSRU), and the filling means is a pressurized evaporator or It is preferably a pump.

According to the floating low-temperature liquefied gas filling facility and the low-temperature liquefied gas delivery method using the floating low-temperature liquefied gas filling facility, the container placed on the transport truck is filled directly from the floating low-temperature liquefied gas filling facility, and thus the container is liquefied at low temperature. Since low-temperature liquefied gas can be transferred to a port that accepts gas as long as there is an area where transport trucks stop, there is no need to construct expensive receiving facilities, and low-temperature liquefied gas can be easily installed in many areas that do not have such facilities. Delivery is possible.

Further, according to the present floating low-temperature liquefied gas filling facility according to the present invention and the low-temperature liquefied gas delivery method using the same, a plurality of low-temperature liquefied gases are injected from the floating low-temperature liquefied gas filling facility by the low-temperature liquefied gas distribution unit. Since the gas is selectively divided into hoses, it can be divided according to the number of transport trucks on the receiving side, and simultaneous filling is possible. This makes it possible to efficiently fill the low temperature liquefied gas. When filling a plurality of containers at the same time, the filling time varies by providing a flow rate detecting means and a flow rate adjusting means for individually detecting the flow rate of the low temperature liquefied gas discharged from each discharge port of the low temperature liquefied gas distribution unit. It is possible to perform the filling work most efficiently.

Further, the floating low temperature liquefied gas filling facility according to the present invention includes a hose used for receiving and discharging and a crane supporting the hose, so that the liquefied gas such as a liquefied natural gas ship or a floating liquefied natural gas storage and regassing facility is provided. There is no need to equip the supply equipment side with hoses or cranes for transferring liquefied natural gas. Similarly, there is no need to equip the receiving side with hoses or cranes. Therefore, if there is room for the truck to stop at the port, one floating low-temperature liquefied gas filling facility can fill the containers on the truck at multiple points with low-temperature liquefied gas. In addition, even if the container is no longer required to be filled with low-temperature liquefied gas in the future due to the construction of a primary base equipped with a truck filling facility on land, for example, it will be towed or self-propelled to another area or island. However, even in places where there is no such primary base, it is possible to carry out a low-temperature liquefied gas distribution business.

Containers filled with low-temperature liquefied gas can be transported by trucks, railroads, freighters, etc., so they are scattered over a wide area directly without the need for pipelines, dedicated equipment, primary bases, secondary bases, etc. It will be possible to deliver to small consumers.

It is a figure which shows schematic the floating type low temperature liquefied gas filling equipment by embodiment of this invention, and the low temperature liquefied gas delivery method using this. It is a schematic diagram which shows the method of transferring the low-temperature liquefied gas to the container on the ground by the floating low-temperature liquefied gas filling facility according to the embodiment of the present invention in a plane. It is a figure which shows schematic structure of the low temperature liquefied gas distribution unit by embodiment of this invention. It is a flowchart for demonstrating the low temperature liquefied gas delivery method by embodiment of this invention.

Next, a specific example of a floating low-temperature liquefied gas filling facility according to the present invention and a mode for carrying out a low-temperature liquefied gas delivery method using the same will be described in detail with reference to the drawings.
FIG. 1 is a diagram schematically showing a floating low-temperature liquefied gas filling facility according to an embodiment of the present invention and a low-temperature liquefied gas delivery method using the same.
Referring to FIG. 1, the floating low-temperature liquefied gas filling facility 10 according to the embodiment of the present invention includes a floating body 11 floating on the sea, a barge tank 12, a hose 13, a crane 14, and a filling means provided on the floating body 11. It has 15 and a low temperature liquefied gas distribution unit 20.

The floating low-temperature liquefied gas filling facility 10 according to the embodiment of the present invention transfers the low-temperature liquefied gas from the liquefied gas supply facility to the barge tank 12 for temporary storage, and then moves to the delivery destination port to fill the filling means 15. By directly transferring the low-temperature liquefied gas from the barge tank 12 to the container placed on the transport truck waiting on the ground, it is possible to easily deliver the low-temperature liquefied gas even to a delivery destination without a receiving facility. It is a facility to do.
Further, according to the floating low-temperature liquefied gas filling facility 10 according to the embodiment, even when there are a plurality of transfer destination containers, the low-temperature liquefied gas distribution unit 20 is used to fill the plurality of containers with the low-temperature liquefied gas at the same time. It is possible to efficiently deliver low-temperature liquefied gas in a short time.

FIG. 1A shows a barge of a floating low-temperature liquefied gas filling facility 10 from a liquefied gas supply facility 1 at sea in a series of delivery flows for delivering low-temperature liquefied gas from a liquefied gas supply facility to a container on the ground. The stage of transferring the low-temperature liquefied gas to the tank 12 is shown, and FIG. 1 (b) shows the stage of moving the floating low-temperature liquefied gas filling facility 10 for temporarily storing the low-temperature liquefied gas to the delivery destination. c) indicates a step of filling the low temperature liquefied gas stored in the barge tank 12 into a container arranged on a transport truck waiting on the ground.

With reference to FIG. 1A, the floating low-temperature liquefied gas filling facility 10 is moored side by side with the liquefied gas supply facility 1 standing by at sea, and the low-temperature liquefied gas storage tank of the liquefied gas supply facility 1 and the floating type The barge tank 12 of the low temperature liquefied gas filling facility 10 is connected by a hose 13.
In the embodiment, the low temperature liquefied gas is liquefied natural gas (LNG), and the liquefied gas supply facility 1 is a liquefied natural gas ship or a floating liquefied natural gas storage regasification facility (FSRU). Since there are waves on the sea, when the floating low-temperature liquefied gas filling facility 10 is moored side by side with the liquefied gas supply facility 1, it is placed side by side with a buffer 18 provided with a buffer such as rubber so as not to collide directly. .. When the cushioning portion is provided on the side surface of the floating low temperature liquefied gas filling facility 10, it is not necessary to prepare the buffering body 18 as another buffering element. The shock absorber 18 shown in FIG. 1 (a) is an air fender, and is shown in a shape provided with a plurality of tire-shaped rubbers around a cylindrical main body, but if it is intended to prevent direct collision when moored. , The shape and material can be anything.

In the embodiment, the liquefied gas supply facility 1 stands by in a state of being moored by a mooring measure protruding from the sea or a mooring means such as an underwater pier or a harbor pier, and the floating low-temperature liquefied gas filling facility 10 is a liquefied gas supply facility 1. The low-temperature liquefied gas is delivered by going back and forth between the delivery destination and one or more delivery destinations. Therefore, the buffer 18 is installed as a permanent facility at a place where the floating low temperature liquefied gas filling facility 10 is moored. By doing so, the floating low-temperature liquefied gas filling facility 10 can be quickly moored to the liquefied gas supply facility 1. The floating low-temperature liquefied gas filling facility 10 is moored to the liquefied gas supply facility 1 steadily by using the mooring measure 19 so that the liquefied gas supply facility 1 and the floating low-temperature liquefied gas filling facility 10 do not misalign.

The liquefied natural gas needs to be kept at -162 ° C or lower in order to maintain the liquid phase at normal pressure, and a flexible hose is used for the hose 13. The liquefied gas supply facility 1 is very large, and the discharge port for discharging low-temperature liquefied gas from the storage tank is located high above the sea surface, and the height difference from the height of the barge tank 12 is large. Therefore, a floating body is connected to the hose 13. A crane 14 provided in the low temperature liquefied gas filling facility 10 is used. By providing the crane 14 on the floating low-temperature liquefied gas filling facility 10 side in this way, it is not necessary to install a special crane 14 for connecting the transfer hose to the liquefied gas supply facility 1, and various liquefied gas supplies are provided. Acceptance from equipment 1 is possible. Since the crane 14 is for suspending the hose 13 or the low temperature liquefied gas distribution unit 20 connected to the tip of the hose 13, the weight to be suspended is limited, and a large one for suspending a heavy object is not required. Since it is necessary to lift the hose 13 high, a tall hose that reaches a high place is desirable, and a telescopic crane may be used.

If the hose 13 comes into contact with the sea surface, the temperature of the liquefied natural gas may rise due to the heat input from the seawater. Therefore, the crane 14 suspends and holds the hose 13 at a predetermined height so as not to hang on the sea surface. ..
Further, in the embodiment, the floating low temperature liquefied gas filling facility 10 includes a hose support 16 that supports the hose 13 from below at a predetermined height so as to prevent the hose 13 from hanging down.

It is desirable that the barge tank 12 does not have a capacity larger than necessary in order to mainly deliver low-temperature liquefied gas to a small port or the like without a receiving facility. In the embodiment, for example, it has a diameter of about 3 m and a length of about 20 m, which is equivalent to four containers on a transport truck. However, the size is not limited to this, and it may be decided in consideration of the topography and equipment conditions of the area where the delivery of low-temperature liquefied gas is required, the number of transport trucks to be accepted, the traffic conditions, etc. It doesn't matter.

Referring to FIG. 1B, the floating low-temperature liquefied gas filling facility 10 storing the low-temperature liquefied gas moves by sea toward the receiving port. In FIG. 1B, since the floating body 11 is a barge ship and does not have power for navigation such as an engine, it is shown to be connected to the tugboat 30 via a tow rope 31 and towed. An engine may be mounted on the floating body 11 to navigate by itself.

With reference to FIG. 1 (c), when the floating low-temperature liquefied gas filling facility 10 berths at the port of the transportation destination, the barge tank 12 and the container 41 arranged on the transportation truck 40 waiting on the ground are connected by a hose 13. It is connected, and the low temperature liquefied gas in the barge tank 12 is filled in the container 41 by the filling means 15.

The filling means 15 is a pressurized evaporator or a pump. In the case of the pressurized evaporator, a part of the low temperature liquefied gas in the barge tank 12 is vaporized and then returned to the barge tank 12, and the pressure in the barge tank 12 is increased. The low temperature liquefied gas is sent out by raising. In the case of a pump, since the low-temperature liquefied gas is directly increased in pressure, it is necessary to insert it between the flow paths from the barge tank 12 to the container 41, and the hose 13 is connected so as to connect the pump and the container 41.
As long as the low-temperature liquefied gas can be delivered, the filling means 15 may be a pressurized evaporator or a pump, but a pressurized evaporator capable of stably pressurizing the low-temperature liquefied gas is preferable because it may be shaken by waves at sea.

When there is only one container 41 on the receiving side, the hose 13 directly connects the end on the container 41 side to the inlet of the container 41, but when there are a plurality of containers 41 on the receiving side, the end of the hose 13 is connected. The low temperature liquefied gas distribution unit 20 is connected. The low-temperature liquefied gas distribution unit 20 has one inflow port for the low-temperature liquefied gas connected to the hose 13 on the upstream side, but the low-temperature liquefied gas is discharged from the plurality of discharge ports in the low-temperature liquefied gas distribution unit 20. The flow path of is branched into multiple.

Further, the low-temperature liquefied gas distribution unit 20 is provided with an on-off valve that selectively opens and closes the outlets of each discharge port, and an injection hose 22 that connects each discharge port and each container 41 is provided at the tip of the on-off valve. Be connected. Therefore, by selecting the on-off valve of the discharge port connected to the container 41 to be filled at the same time from among the plurality of discharge ports and opening the open state, it is possible to fill the plurality of containers 41 at the same time. ..

Filling a container 41 for low-temperature liquefied gas of a general size with low-temperature liquefied gas requires about 1 hour per unit. For example, when filling four containers 41 with low-temperature liquefied gas, it takes four hours or more because only one container can be filled at a time by the conventional technique. However, by using the low temperature liquefied gas distribution unit 20, it is possible to complete the filling of four containers 41 at the same time in about one hour.

Even when the barge tank 12 is filled with the low-temperature liquefied gas, the hose 13 connecting the two is suspended by the crane 14 and held at a predetermined height. When connecting the low-temperature liquefied gas distribution unit 20, the injection hose 22 is not crawled on the ground by suspending the low-temperature liquefied gas distribution unit 20 with the crane 14 as shown in FIG. 1 (c). Since it does not interfere with the passage, it is possible to prevent a decrease in workability.

In the embodiment, the floating low temperature liquefied gas filling facility 10 includes a hose support 17 that supports the hose 13 from below at a predetermined height so as to prevent the hose 13 from hanging down. In FIG. 1C, it is described that the hose support 16 is provided on one edge of the floating body main body 11 and the hose support 17 is provided on the edge opposite to the hose support 16, but the connection direction of the hose 13 may be changed. When fixing to one of them, the hose supports (16, 17) may be unified into one, and in this case, the unified hose support has a variable support height for supporting the hose 13. It is preferable to configure it.

FIG. 2 is a schematic view showing a method for transferring a low-temperature liquefied gas to a container on the ground by a floating low-temperature liquefied gas filling facility according to an embodiment of the present invention.
FIG. 2 shows a state in which four transport trucks 40 parked on the ground are simultaneously filled with low-temperature liquefied gas. The transport truck 40 is an example of a trailer type in which a container 41 is installed on a trailer serving as a bogie and the container 41 is towed by a towing vehicle 42.

The low temperature liquefied gas distribution unit 20 includes a low temperature liquefied gas distributor 21 and an injection hose 22. The low-temperature liquefied gas distributor 21 has one inflow port for the low-temperature liquefied gas connected to the hose 13, and four outlets, thereby having a substantially home-based housing.
The low temperature liquefied gas distributor 21 is suspended by a crane 14 behind four transport trucks 40 at a predetermined height, and four injection hoses 22 connected to four discharge ports are connected to each container 41. ..

In the embodiment, for example, when filling a total of seven containers 41 with low-temperature liquefied gas, the first time, as shown in FIG. 2, four containers 41 are connected and simultaneous filling is performed. In the second filling, three containers 41 are connected, but as will be described later with reference to FIG. 3, the low temperature liquefied gas distribution unit 20 is provided with an on-off valve for each discharge port, so that the remaining containers 41 are not connected. By closing only the on-off valve of one discharge port, it is possible to selectively fill three containers 41 at the same time.

The transportation truck 40 in which the container 41 is filled with low-temperature liquefied gas can be directly transported by land to the next destination, or the container 41 can be transferred to a freight car at the nearest station and transported by rail transportation, or the nearest station. It is also possible to transport by sea by container freighter at the freight port of Japan, and it is possible to develop various transportation forms according to the traffic conditions at the receiving place.

FIG. 3 is a diagram schematically showing the structure of a low temperature liquefied gas distribution unit according to an embodiment of the present invention.
Since the low-temperature liquefied gas distribution unit 20 is detachably attached to one end of the hose 13, the low-temperature liquefied gas distributor 21 is provided with an end for connection with the hose 13 at the inflow port of the low-temperature liquefied gas. FIG. 3 shows a configuration in which a flange is provided so that the inflow port can be fixed with bolts and nuts in accordance with the flange provided at the end of the hose 13, but the configuration is not limited to this configuration as long as it can be attached and detached. In the case of connection, a connection end corresponding to the shape of the end of the hose 13 is provided, such as a male screw matching the female screw provided at the end of the hose 13.

Further, the low temperature liquefied gas distributor 21 has a flow path structure including a flow path that branches into a plurality of branches. The low temperature liquefied gas distributor 21 shown in FIG. 3 has four branches and has four outlets. Each of the four discharge ports is provided with an on-off valve 23, and the discharge port for discharging the low-temperature liquefied gas can be selected depending on which on-off valve 23 is opened.

The on-off valve 23 may be manual or electric, but in the case of electric power, power is supplied to the on-off valve 23 from a power supply means such as a storage battery provided in the floating low-temperature liquefied gas filling facility 10 via a power supply line wired along the hose 13. Supply. Further, in the case of electric power, the opening / closing control of the on-off valve 23 is performed wirelessly or by wire.

In one embodiment, an indicator lamp is provided in the vicinity of each on-off valve 23 or at a position where the correspondence with each on-off valve 23 can be visually confirmed so that the open / closed state of the on-off valve 23 can be visually confirmed. The open state or the closed state is displayed by distinguishing whether the lamp is on or off, or by changing the color of the displayed lamp. As a result, even if the on-off valve 23 of the discharge port that is not connected to the container 41 is accidentally opened, it can be easily confirmed and the closed state can be corrected before the start of filling.

A flow rate detecting means 24 is further provided on the downstream side of each on-off valve 23. Depending on the shape of the flow path and the method of selecting the on-off valve 23, the discharge flow rate of the low-temperature liquefied gas from each discharge port may differ. If the amount of outflow is different, even if the containers are filled at the same time, the filling time differs between the containers 41, which may lead to a decrease in work efficiency. Therefore, in one embodiment, the flow rate detecting means 24 detects the discharge flow rate of the low-temperature liquefied gas from each discharge port, and based on the result, the low-temperature liquefied gas discharge flow rate from each discharge port becomes equal. The valve opening degree of the on-off valve 23 is adjusted.
The low temperature liquefied gas discharge flow rate may be adjusted by providing a flow rate adjusting means different from that of the on-off valve 23. In that case, the low temperature liquefied gas discharge flow rate is adjusted by the flow rate adjusting means based on the discharge flow rate detected by the flow rate detecting means 24. adjust.

The injection hose 22 is a flexible hose like the hose 13. Unlike the hose 13, the injection hose 22 does not need to be attached and detached as frequently as the hose 13, but since it may be replaced when it deteriorates, the low temperature liquefied gas distributor is formed into a flange shape so that the end can be fixed with bolts and nuts. Detachably attached to 21.

A hook 25 is provided on the upper surface of the low-temperature liquefied gas distributor 21, and when filling the low-temperature liquefied gas, the hook 25 is lifted by the crane 14 as shown in FIGS. 1 (c) and 2 to achieve a height with good workability. By holding it, it is possible to arrange it so that the filling work can be easily performed. Further, when the hose 13 is detached after the filling is completed, the hose has a function of adjusting the height difference so that the LNG is completely transferred to the barge tank 12 so that the LNG does not remain in the hose.

Although FIG. 3 illustrates the low temperature liquefied gas distribution unit 20 having four discharge ports, the number of discharge ports is not limited to four. It may be more or less than four. Further, although the structure in which the discharge ports are arranged in a horizontal row is illustrated in FIG. 3, a plurality of discharge ports may be arranged concentrically at equal intervals so that the outflow characteristics are equal according to the embodiment. At this time, when the direction of the discharge port is installed diagonally from the inflow port, the low temperature liquefied gas distributor 21 has a funnel shape, and when the direction of the discharge port is arranged in the radial direction from the inflow port, the low temperature liquefied gas The distributor 21 has a disk-shaped shape.

FIG. 4 is a flowchart for explaining a low-temperature liquefied gas delivery method according to an embodiment of the present invention.
Referring to FIG. 4, as a step of receiving the low-temperature liquefied gas into the floating low-temperature liquefied gas filling facility 10, low-temperature liquefaction is performed from the liquefied gas supply facility 1 to the barge tank 12 of the floating low-temperature liquefied gas filling facility 10 via a hose 13. The gas is transferred (steps S400 to S420).

First, in step S400, the floating low-temperature liquefied gas filling facility 10 is moored with the buffer 18 sandwiched between the liquefied gas supply facility 1. In the embodiment, the buffer 18 is permanently installed in the liquefied gas supply facility 1 according to the mooring position of the floating low temperature liquefied gas filling facility 10. Therefore, it is not necessary to prepare the buffer 18 every time the low temperature liquefied gas is received into the floating low temperature liquefied gas filling facility 10. The mooring of the floating low-temperature liquefied gas filling facility 10 can be steadily performed by connecting a plurality of front and rear points to the liquefied gas supply facility 1 by mooring measure 19.

Next, in step S405, the liquefied gas supply facility 1 and the hose 13 of the floating low temperature liquefied gas filling facility 10 are connected. At this time, the hose 13 is lifted and connected by using the crane 14 provided in the floating low-temperature liquefied gas filling facility 10, and the hose 13 is held at a predetermined height even during the low-temperature liquefied gas transfer, so that the low-temperature liquefied gas can be discharged. It is possible to directly receive low-temperature liquefied gas even from a large vessel that does not have a crane 14 or a hose 13.

In step S410, the transfer of the low temperature liquefied gas is started from the liquefied gas supply facility 1 to the barge tank 12 of the floating low temperature liquefied gas filling facility 10. When the required amount of low-temperature liquefied gas is transferred in step S415 and the transfer of low-temperature liquefied gas is completed, the hose 13 of the floating low-temperature liquefied gas filling facility 10 is disconnected from the liquefied gas supply facility 1 in step S420. The separated hose 13 is recovered by the floating low-temperature liquefied gas filling facility 10 using the crane 14, and finally the mooring measure 19 is removed to end the receiving stage of the low-temperature liquefied gas.

Next, as a transportation stage, the floating low-temperature liquefied gas filling facility 10 is moved to the port where the low-temperature liquefied gas is delivered (step S425, step S430).
In step S425, the floating low-temperature liquefied gas filling facility 10 is moved toward the standby position of the transport truck 40 in the port, which is the delivery destination. In the embodiment, the floating low temperature liquefied gas filling facility 10 does not have a power means for self-navigation, and is towed by a tugboat 30 to move. Therefore, a tow rope hook for hanging the tow rope 31 is provided in the front and rear. As a result, a plurality of floating low-temperature liquefied gas filling facilities 10 are connected in a vertical row by a tow rope 31, and the head is towed by a tugboat 30 to move the plurality of floating low-temperature liquefied gas filling facilities 10 at once. It becomes possible.

In another embodiment, the floating low-temperature liquefied gas filling facility 10 is provided with a power means for self-navigation, and moves by itself without using a tugboat 30 as a delivery destination.
The floating low-temperature liquefied gas filling facility 10 berths at the standby position of the transport truck 40 in the port when it arrives at the delivery destination port, whether it is towed by the tugboat 30 or transferred by itself (step S430).

After that, the filling means 15 shifts to a filling step (steps S435 to S470) in which the container 41 arranged on the transport truck 40 on the ground is directly filled with the low-temperature liquefied gas from the barge tank 12 via the hose 13.
First, in step S435, it is determined whether or not to fill the plurality of containers 41 at the same time, and when there are a plurality of containers 41 to be filled at the same time, the low temperature liquefied gas distribution unit 20 is connected to one end of the hose 13 in step S440.

Next, in step S445, the required number of the plurality of injection hoses 22 of the low temperature liquefied gas distribution unit 20 is connected to the containers 41 on the truck in the port according to the number of containers 41 simultaneously filled with the low temperature liquefied gas. The low-temperature liquefied gas distribution unit 20 has a plurality of discharge ports, but since the opening and closing can be switched by the on-off valve 23 for each discharge port, the number of containers 41 to be filled at the same time is larger than the number of discharge ports of the low-temperature liquefied gas distribution unit 20. At least, the on-off valve 23 of the unused discharge port can be closed, and the number of connected containers 41 can be filled at the same time.
In step S455, the on-off valve 23 of the low-temperature liquefied gas distribution unit 20 is opened according to the container 41 to be filled.

In one embodiment, a switch such as a sensor for detecting the connection with the container 41 or a push switch that operates when the connection with the container 41 is made is provided at the end of the injection hose 22 on the connection side with the container 41. The opening / closing valve 23 of the discharge port to which the injection hose 22 is connected is not opened unless the connection to the injection hose 22 is made. This makes it possible to prevent the low temperature liquefied gas from being accidentally discharged to the injection hose 22 which is not connected to the container 41.

When the above preparations for filling are completed, the filling means 15 of the floating low-temperature liquefied gas filling facility 10 is operated in step S460 to fill the container 41 with the low-temperature liquefied gas.
When the parking space of the transport truck 40 is narrow and the number of containers 41 that can be filled at the same time is limited, or the demand for low-temperature liquefied gas is large, even one simultaneous filling by the low-temperature liquefied gas distribution unit 20 is still less than the demand. When multiple fillings are required, such as in the case, the on-off valve 23 is closed once when the first filling is completed, the transport truck 40 is replaced and connected to a new container 41, and then the filling in steps S435 to S460 is completed. Repeat the work.

Further, when adjusting the discharge flow rate of the low-temperature liquefied gas of the low-temperature liquefied gas by using the flow rate detecting means 24, each discharge port is opened by the flow rate detecting means 24 at the stage where the filling of the low-temperature liquefied gas is started in step S460. The discharge flow rate of the flowing low-temperature liquefied gas is detected, and based on the result, the discharge flow rate of the low-temperature liquefied gas is individually adjusted by the flow rate adjusting means provided separately from the on-off valve 23 or the on-off valve 23. This is done by providing a control device for remotely controlling the on-off valve 23 or the flow rate adjusting means in the floating low temperature liquefied gas filling facility 10, inputting the output from the flow rate detecting means 24 to the control device by wire or wirelessly, and inputting the output from the control device respectively. It is realized by outputting a control signal based on the input value to the on-off valve 23 or the flow rate adjusting means of the above by wire or wirelessly.

If there is only one container 41 to be filled by returning to step S435, it is not necessary to distribute the low temperature liquefied gas. Therefore, in step S450, the hose 13 is directly connected to the container 41 without connecting the low temperature liquefied gas distribution unit 20. In step S460, the filling means 15 of the floating low temperature liquefied gas filling facility 10 is operated to fill the container 41 with the low temperature liquefied gas.

When the low-temperature liquefied gas once filled in the barge tank 12 is continuously delivered to a plurality of destinations, the low-temperature liquefied gas distribution unit 20 is connected to the tip of the hose 13 at the previous delivery location to fill the barge tank 12. At the next delivery location, the work may start from a state in which the low temperature liquefied gas distribution unit 20 is connected to the tip of the hose 13 in advance. When filling a single container 41 in such a situation, the low temperature liquefied gas distribution unit 20 may be removed and the hose 13 may be directly connected to the container 41, or the low temperature liquefied gas distribution unit 20 may remain connected. The injection hose 22 of the book may be selectively connected, and the on-off valve 23 connected to the connected injection hose 22 may be opened to fill the low temperature liquefied gas.

Further, when the hose 13 is often filled and delivered to a plurality of containers 41 at the same time depending on the delivery status of the low-temperature liquefied gas, the hose 13 receives the low-temperature liquefied gas from the liquefied gas supply facility 1 and fills the container 41. The hose 13-1 dedicated to receiving and the hose 13-2 dedicated to filling with the low-temperature liquefied gas distribution unit 20 connected may be separately configured instead of being shared by the above. In this case, the work of step S435, step S440, and step S450 of FIG. 4 becomes unnecessary.

When the filling of the low-temperature liquefied gas into the container 41 requiring filling in step S465 is completed, the hose 13 or the injection hose 22 connected to the container 41 is disconnected in step S470, and the floating low-temperature liquefied gas filling facility 10 is connected. Store. After that, filling is continued toward the next delivery destination, or the process returns to the liquefied gas supply facility 1 in preparation for the next delivery, and the work from the above-mentioned low temperature liquefied gas receiving stage is repeated.

When the empty container 41 is filled with the low-temperature liquefied gas, the temperature inside the container 41 is not normally cooled to the temperature of the low-temperature liquefied gas. Therefore, in addition to the residual gas such as methane gas inside the container 41, a part of the low-temperature liquefied gas is used. Gases, and the pressure inside the container 41 temporarily rises in the initial stage of filling. As the filling of the low-temperature liquefied gas progresses and the temperature inside the container 41 decreases, the pressure inside the container 41 also decreases accordingly.

A filling method can be taken in which the gas in the container 41 is returned to the barge tank 12 on the supply side to suppress the influence of the pressure increase in the container 41 with the filling of the low-temperature liquefied gas, but this method can be used to remove components that are easily gasified. In order to recover, it is possible that the composition of the components of the finally filled low-temperature liquefied gas will change.

On the other hand, if the gas in the container 41 is cooled and dissolved in the low-temperature liquefied gas, it is possible to suppress the pressure increase in the container 41. According to this method, the gas component is not recovered in the barge tank 12, so that the component composition of the low-temperature liquefied gas to be filled does not change. In addition, there is no need to install a return hose dedicated to gas.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above-described embodiments and is variously modified within a range that does not deviate from the technical scope of the present invention. It is possible to do.

1 Liquefied gas supply equipment 10 Floating low-temperature liquefied gas filling equipment 11 Floating body 12 Barge tank 13 Hose 14 Crane 15 Filling means 16, 17 Hose support 18 Buffer 19 Mooring measures 20 Low-temperature liquefied gas distribution unit 21 Low-temperature liquefied gas distributor 22 Injection hose 23 On-off valve 24 Flow detection means 25 Hook 30 Tag boat 31 Tow rope 40 Transport truck 41 Container 42 Tow vehicle

The floating low-temperature liquefied gas filling facility according to the present invention, which has been made to achieve the above object, is a floating low-temperature liquefied gas filling facility that delivers low-temperature liquefied gas from the sea to land, and temporarily fills the low-temperature liquefied gas. A hose for transferring the low-temperature liquefied gas from the liquefied gas supply facility to the barge tank, and a hose for transferring the low-temperature liquefied gas from the barge tank to a container arranged on a transport truck on the ground. A low-temperature liquefied gas distribution unit detachably attached to one end of the hose, a crane that holds the hose at a predetermined height during transfer of the low-temperature liquefied gas, and a filling means for filling the container with the low-temperature liquefied gas. The low-temperature liquefied gas distribution unit has an inflow port for low-temperature liquefied gas connected to one end of the hose, a plurality of discharge ports for simultaneously discharging the low-temperature liquefied gas to a plurality of the containers, and opening and closing of each discharge port. An on-off valve for selectively performing the above, and a plurality of injection hoses having one end connected to the discharge port and the other end connected to the injection port of the container, the injection hose being the end on the connection side to the container. Is equipped with a sensor that detects the connection with the container or a switch that operates when the connection with the container is made, and the on-off valve of the discharge port to which the injection hose is connected is not connected to the container of the injection hose. It is characterized in that it is configured so that the opening operation is not performed .

The hose low temperature liquefied gas from the barge tank by said filling means, preferably be transferred directly to one or more of the containers through the low-temperature liquefied gas distribution unit.

The floating low-temperature liquefied gas filling facility according to the present invention, which is made to achieve the above object, is a floating low-temperature liquefied gas filling facility that delivers low-temperature liquefied gas from the sea to land, and temporarily fills the low-temperature liquefied gas. A hose for transferring the low-temperature liquefied gas from the liquefied gas supply facility to the barge tank, and a hose for transferring the low-temperature liquefied gas from the barge tank to a container arranged on a transport truck on the ground. A low-temperature liquefied gas distribution unit detachably attached to one end of the hose, a crane that holds the hose at a predetermined height during transfer of the low-temperature liquefied gas, and a filling means for filling the container with the low-temperature liquefied gas. The low-temperature liquefied gas distribution unit has an inflow port for low-temperature liquefied gas connected to one end of the hose, a plurality of discharge ports for simultaneously discharging low-temperature liquefied gas to a plurality of the containers, and opening and closing of each discharge port. The low temperature is provided with an on-off valve for selectively performing the above, a plurality of injection hoses having one end connected to the discharge port and the other end connected to the injection port of the container, and a hook for lifting by the crane. When filling a plurality of containers at the same time, the liquefied gas distribution unit is attached to one end of the hose connected to the filling means, and is lifted to a predetermined height by the crane for use. The low temperature liquefied gas distribution unit is used. It has a funnel-shaped or disk-shaped shape, and the plurality of discharge ports are arranged at equal intervals so that the outflow characteristics are even, and the valve opening of the on-off valve is the discharge flow rate of low-temperature liquefied gas from each discharge port. The injection hose is connected with a sensor that detects the connection with the container or a switch that operates when the connection with the container is made, at the end of the connection side to the container. The on-off valve of the discharge port is configured so that the opening operation is not performed unless the injection hose is connected to the container.

Claims (7)

A floating low-temperature liquefied gas filling facility that delivers low-temperature liquefied gas from the sea to land.
A barge tank that temporarily fills and stores low-temperature liquefied gas,
A hose for transferring low-temperature liquefied gas from the liquefied gas supply facility to the barge tank and transferring the low-temperature liquefied gas from the barge tank to a container placed on a transport truck on the ground.
A low-temperature liquefied gas distribution unit that is detachably attached to one end of the hose,
A crane that holds the hose at a predetermined height during low-temperature liquefied gas transfer, and
It has a filling means for filling the container with low-temperature liquefied gas.
The low-temperature liquefied gas distribution unit selectively opens and closes an inflow port for low-temperature liquefied gas connected to one end of the hose, a plurality of discharge ports for simultaneously discharging low-temperature liquefied gas to a plurality of the containers, and each discharge port. Floating low-temperature liquefied gas filling equipment characterized by being equipped with an on-off valve. The low-temperature liquefied gas distribution unit is provided with a flow rate detecting means for individually detecting the flow rate of the low-temperature liquefied gas discharged from each discharge port, and is separate from the on-off valve or the on-off valve based on the detected flow rate of the low-temperature liquefied gas. The floating low-temperature liquefied gas filling facility according to claim 1, wherein the discharge flow rate of the low-temperature liquefied gas can be individually adjusted by a flow rate adjusting means provided individually. The low temperature liquefied gas distribution unit further includes a plurality of injection hoses having one end connected to the discharge port and the other end connected to the inlet of the container, and the low temperature liquefied gas is supplied from the barge tank to the hose by the filling means. The floating low-temperature liquefied gas filling facility according to claim 2, wherein the low-temperature liquefied gas distribution unit is directly transferred to one or a plurality of the containers. The low temperature liquefied gas is liquefied natural gas (LNG), the liquefied gas supply facility is a liquefied natural gas ship or a floating liquefied natural gas storage regassing facility (FSRU), and the filling means is a pressurized evaporator or The floating low-temperature liquefied gas filling facility according to any one of claims 1 to 3, characterized in that it is a pump. A low-temperature liquefied gas delivery method using the floating low-temperature liquefied gas filling facility according to claim 1.
After mooring the floating low-temperature liquefied gas filling facility in the liquefied gas supply facility, the receiving stage of transferring the low-temperature liquefied gas from the liquefied gas supply facility to the barge tank of the floating low-temperature liquefied gas filling facility via a hose.
The transportation stage to move the floating low-temperature liquefied gas filling facility to the delivery location of the low-temperature liquefied gas,
It has a filling step of directly filling a container arranged on a transport truck on the ground from the barge tank via the hose by a filling means with a low-temperature liquefied gas.
When filling a plurality of containers with low-temperature liquefied gas at the same time, it is characterized by further having a connection step for connecting a low-temperature liquefied gas distribution unit having a plurality of discharge ports at one end on the discharge side of the hose before the filling step. Low temperature liquefied gas delivery method. The low-temperature liquefied gas distribution unit selectively opens and closes an inflow port for low-temperature liquefied gas connected to one end of the hose, a plurality of discharge ports for simultaneously discharging low-temperature liquefied gas to a plurality of the containers, and each discharge port. It is equipped with an on-off valve and a flow rate detecting means for individually detecting the flow rate of the low-temperature liquefied gas discharged from each discharge port.
The filling step includes a selection step of selectively opening an on-off valve of a required discharge port according to the number of containers to be filled at the same time.
Includes an adjustment step in which the discharge flow rate of the low-temperature liquefied gas is individually adjusted by the on-off valve or a flow rate adjusting means separately provided separately from the on-off valve based on the flow rate of the low-temperature liquefied gas detected by the flow rate detecting means. The low-temperature liquefied gas delivery method according to claim 5, wherein the low-temperature liquefied gas is delivered. The low temperature liquefied gas is liquefied natural gas (LNG), the liquefied gas supply facility is a liquefied natural gas ship or a floating liquefied natural gas storage regassing facility (FSRU), and the filling means is a pressurized evaporator or The low temperature liquefied gas delivery method according to claim 5 or 6, characterized in that it is a pump.

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