JP2008144877A - System and method for supplying natural gas - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system and method for supplying natural gas, which maintains certain safety upon supply natural gas to a user in an area without a gas conduit, and is constructed without requiring a major modification from a general equipment or a complicated operation. <P>SOLUTION: The system for supplying natural gas is equipped with an LNG tank 31 for storing LNG, an LNG vaporizer 32 for vaporizing LNG delivered from the LNG tank 31, and a bulk vessel 3 for installing the LNG tank 31 and the LNG vaporizer 32 therein. The LNG vaporizer 32 is mounted on a vehicle 33 having the LNG tank 31 installed therein, and the LNG vaporized on the bulk vessel 3 side is supplied from a satellite base 2 via a liquid feed line 34 formed as a flow passage for connecting the LNG vaporizer 32 to the satellite base 2 by piping. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention continuously uses natural gas made from LNG (Liquefied Natural Gas) that has been transported from the outside to consumers in areas without gas conduits at satellite bases owned by gas companies and the like. The present invention relates to a natural gas supply system and a natural gas supply method.

  Conventionally, in the LNG satellite base, instead of using the transferred LNG from the tank truck to the LNG storage tank, the method used by transporting the bulk container and installing it as a tank is adopted. Thus, a technology has been disclosed that can supply natural gas continuously and inexpensively to consumers in areas without a gas conduit (see Patent Document 1). In this case, since the vaporizer for vaporizing LNG into natural gas is fixedly installed on the satellite base side, liquid LNG is supplied from the bulk container to the satellite base side.

  LNG in such technology is extremely low temperature (about -162 ° C at normal pressure) and flammable, so if it leaks, there is a risk of frostbite if touched by humans, and there is a risk of fire or explosion was there. For this reason, it was necessary to pay close attention when handling LNG. When LNG leaks, it becomes a flammable gas whose volume is about 600 times. For example, when connecting and disconnecting between a bulk container and a satellite base with piping, a skilled operator takes time to operate. Had to do.

  In addition, the part where the pipe is connected and disconnected is a connecting part between the bulk container that is not fixed to the foundation and the satellite base that is fixed to the foundation, which is a structural weakness in the facility system that supplies natural gas. It was. That is, since the bases to be fixed are different from each other, for example, in the event that the connection portion is damaged due to an earthquake or the like, it is inevitable that LNG remaining in the piping will be released even if the shut-off function operates properly. There was a drawback.

  Such a drawback is not so much a problem, for example, in a factory premises where specialized engineers are stationed. However, for example, when considering driving in the vicinity of a residential area for a general consumer or the like, higher safety is desired.

JP 2005-048794 A

  In view of such circumstances, the present invention can maintain a certain level of safety when supplying natural gas to a consumer in an area without a gas conduit, and requires significant modifications or complicated operations from general-purpose equipment. It is an object to provide a natural gas supply system and a natural gas supply method that can be constructed without any problems.

  The first aspect of the present invention for solving the above problems is to continuously supply natural gas from LNG that has been transported from outside to at least consumers in the area without a gas conduit at a satellite base. A LNG tank for storing the LNG, an LNG vaporizer for vaporizing LNG delivered from the LNG tank, and a bulk container for installing the LNG tank and the LNG vaporizer The LNG vaporizer is mounted on a vehicle in which the LNG tank is installed, and bulk is connected via a liquid feed line formed as a flow path by pipe connection between the LNG vaporizer and the satellite base. The natural gas supply system is characterized in that LNG vaporized on the container side is supplied from a satellite base as natural gas.

  In the first aspect, the LNG vaporizer is mounted on a vehicle in which the LNG tank is installed, and a liquid supply line formed as a flow path is formed by pipe connection between the LNG vaporizer and the satellite base. The LNG vaporized on the bulk container side is supplied from the satellite base as natural gas. Thereby, since LNG is vaporized on the bulk container side, natural gas of about room temperature flows into the flow path connected by piping between the LNG vaporizer and the satellite base. Therefore, it is possible to maintain a certain level of safety when supplying natural gas to consumers in areas without gas conduits. Furthermore, for example, it is not necessary to take a low-temperature measure for the above-described flow path, and connection and disconnection operations of the pipe-connected portion are facilitated and there is no fear of liquid leakage, so that safety can be further improved.

  According to a second aspect of the present invention, the satellite base includes a cogeneration system that supplies electric power, and a hot water tank that communicates with the cogeneration system and supplies hot water generated from exhaust heat output from the cogeneration system. The bulk container is connected to the cogeneration system and the hot water tank by piping so that BOG generated in the LNG tank is consumed at the satellite base. In the natural gas supply system according to one aspect.

  In the second aspect, the bulk container is connected to the cogeneration system and the hot water tank by piping so that the BOG generated in the LNG tank is consumed at the satellite base. As a result, the BOG can be self-consumed at the satellite base.

  According to a third aspect of the present invention, the bulk container includes a pressurization line that pressurizes the inside of the LNG tank and sends out LNG, and is provided in the pressurization line due to a difference in pressure state in the LNG tank. The natural gas supply system according to the first or second aspect, wherein the control valve is opened and closed.

  In the third aspect, the control valve provided in the pressurization line is opened and closed due to the difference in pressure state in the LNG tank.

  A fourth aspect of the present invention is the natural gas according to any one of the first to third aspects, wherein the satellite base has a plurality of connection ports that can be connected to other bulk containers. In the supply system.

  In the fourth aspect, a plurality of connection ports that can be connected to other bulk containers are formed in the satellite base. Thereby, for example, since the LNG vaporizer can be provided on the bulk container side for each bulk container, natural gas can be supplied relatively easily only by switching the bulk container to be operated.

  According to a fifth aspect of the present invention, the natural gas supply system according to any one of the first to fourth aspects is characterized in that, in the satellite base, natural gas mixed with odor is supplied. It is in.

  In the fifth aspect, the natural gas mixed with odor is supplied at the satellite base. Thereby, since natural gas which can detect a leak reliably on the consumer side can be generated, it can contribute to the improvement of safety.

  The sixth aspect of the present invention is a natural gas supply method for continuously supplying natural gas from LNG that has been transported from the outside to a consumer in an area without a gas conduit at a satellite station. A LNG vaporizer that vaporizes LNG delivered from the LNG tank is mounted on a vehicle in which a bulk container for installing the LNG tank for storing the LNG is installed, and the LNG vaporizer and the satellite base A natural gas supply characterized in that the LNG vaporized on the bulk container side is supplied as a natural gas from the satellite base through the flow path by forming a flow path by connecting between the pipes Is in the way.

  In the sixth aspect, a vehicle equipped with a bulk container for installing an LNG tank for storing LNG is equipped with an LNG vaporizer for vaporizing LNG delivered from the LNG tank, and the LNG vaporizer and satellite base are installed. Are connected by a pipe to form a flow path, whereby LNG vaporized on the bulk container side is supplied as natural gas from the satellite base. As a result, a system for supplying natural gas can be constructed without requiring extensive modification from a general-purpose facility or complicated operation.

  According to the present invention, the LNG vaporizer for vaporizing LNG is moved to the bulk container side so that the natural gas at room temperature vaporized on the bulk container side is supplied to the consumer as it is. Natural gas supply system and natural gas that can maintain a certain level of safety when supplying natural gas to consumers in areas where there is no need, and can be constructed without requiring major modifications or complicated operations of equipment It is possible to provide a supply method.

  The best mode for carrying out the present invention will be described below with reference to the drawings. The description of the present embodiment is an exemplification, and the configuration of the present invention is not limited to the following description.

  FIG. 1 is a diagram showing a system configuration of a natural gas supply system according to an embodiment of the present invention. In this embodiment, in a satellite base owned by a gas company or the like, LNG (Liquefied Natural Gas; liquefied natural gas) that has been transported from the outside to at least consumers (for example, ordinary houses) in areas without gas conduits ) Is assumed to be continuously supplied with natural gas.

  As shown in the figure, the natural gas supply system 1 of the present embodiment is mainly divided into a satellite base 2 and a bulk container 3. The satellite base 2 and the bulk container 3 are connected by a plurality of pipe connection parts 4, and LNG and BOG (Boil Off Gas) vaporized on the bulk container 3 side through the pipe connection parts 4 and the like. Is output to the satellite base 2 side.

  Specifically, the bulk container 3 is provided with an LNG tank 31 that stores LNG and an LNG vaporizer 32 that vaporizes LNG delivered from the LNG tank 31. Among these, the LNG tank 31 is installed in a vehicle 33 such as a tank lorry for transportation. By mounting the LNG vaporizer 32 normally installed in the satellite base 2 on such a vehicle 33, LNG can be vaporized on the container 3 side.

  In this embodiment, a hot water type is assumed as such an LNG vaporizer 32. In this embodiment, it is possible to mount the hot water type LNG vaporizer 32 on the bulk container 3 side by using hot water from a hot water tank 42 described later as a hot water type heat source. This makes it possible to reduce the size of the equipment as compared to the case of adopting a generally employed air temperature type LNG vaporizer, and frost formation occurs due to continuous rated operation of the equipment. In this case, it is possible to prevent performance degradation.

  The bulk container 3 uses the LNG tank 31 as a base point, the liquid supply line 34 for supplying the LNG stored in the LNG tank 31 to the satellite base 2 in the state of natural gas, and the BOG generated in the LNG tank 31 as a satellite. There are three control lines including a BOG line 35 that outputs to the base 2 and a pressurization line 36 that pressurizes the inside of the LNG tank 31 and sends out LNG.

  Among these, the liquid feeding line 34 and the BOG line 35 are connected to the LNG vaporizer 32 and communicate with the satellite base 2 via the pipe connecting portions 4a and 4b, respectively. A control valve 301 and a manual valve 302 for adjusting the output of the LNG vaporized by the LNG vaporizer 32 are provided between the LNG vaporizer 32 and the pipe connection portion 4a of the liquid feed line 34. Further, a control valve for controlling the output of BOG generated in the LNG tank 31 between the LNG tank 31 and the LNG vaporizer 32 of the BOG line 35 and between the LNG vaporizer 32 and the pipe connection portion 4b. 303 and a manual valve 304 are provided. After the manual valves 302 and 304 are opened, the control valves 301 and 303 are opened and closed to control the natural gas (vaporized LNG) supplied to the satellite base 2 and the output BOG. ing.

  On the other hand, the pressurization line 36 is disposed so as to circulate again from the LNG tank 31 through the LNG vaporizer 32 to the LNG tank 31. Further, a control valve 305 is interposed in the flow path returning from the LNG vaporizer 32 to the LNG tank 31 in the pressurization line 36.

  When the pressure of the LNG tank 31 is low, by opening the control valve 305, liquefied natural gas is sent from the LNG tank 31 to the LNG vaporizer 32 via the pressurization line 36, and the liquefied natural gas is sent to the LNG vaporizer 32. The vaporized natural gas is supplied into the LNG tank 31. As a result, the pressure in the LNG tank 31 is kept above a certain level. In this way, by installing a function for pressurizing the bulk container 3 side, the inside of the LNG tank 31 is pressurized, and the LNG tank 31 is transferred from the LNG tank 31 to the LNG vaporizer 32 via the liquid feed line 34. Can be sent out.

  Further, the control valves 303 and 305 are controlled so that both of them operate in conjunction with each other and either one is opened as described later. Thereby, the output with respect to the BOG line 35 and the pressurization line 36 can be controlled according to the pressure difference in the LNG tank 31.

  The various control lines 34 to 36 and the control valves 301, 303, and 305 described above are controlled by a control unit (not shown).

  As described above, in the present embodiment, the LNG vaporizer 32 and the LNG tank 31 are mounted on the vehicle 33, and a pipe is connected between the bulk container 3 side where the LNG vaporizer 32 is installed and the satellite base 2. LNG vaporized on the bulk container 3 side can be supplied as natural gas from the satellite base 2 through a liquid feed line 34 connected and formed as a flow path. With such a configuration, for example, when an operation for separating the bulk container 3 and the satellite base 2 is performed, LNG does not remain in the pipe line of the pipe connection portion 4a. Can be improved.

  Moreover, in this embodiment, since natural gas of about room temperature flows into the pipe connection part 4a between the bulk container 3 and the satellite base 2, safety is improved compared to the case of flowing in LNG at extremely low temperature. Can be improved. Furthermore, when LNG is allowed to flow into the pipe connecting portion 4a, it is necessary to use stainless steel as the pipe material, which increases the equipment cost. However, natural gas at a room temperature flows as in this embodiment. In this case, since an inexpensive material for gas piping can be used, the equipment cost can be kept low.

  Such a pipe connection part 4a is normally fixed by bolting using a flange. In this case, the pipe connection portion 4a is cooled several tens of minutes after the start of LNG liquid passage, whereby the inside of the pipeline contracts. For this reason, it is necessary to retighten the bolts of the flange. However, when natural gas of about normal temperature flows in as in this embodiment, the pipe connection part 4a is not cooled, so the flange bolts There is no need to retighten, and the burden of operation on the equipment can be reduced. The same applies to the pipe connection portion 4b.

  On the other hand, the satellite base 2 is provided with a cogeneration system 41 (hereinafter also referred to as a cogeneration system 41) for supplying electric power and a hot water tank 42 for supplying hot water. A mixing tank 44 is provided on the flow path in front of the cogeneration system 41 so that fluctuations in the amount of heat generated from the natural gas can be controlled as necessary.

  In addition, the satellite base 2 is provided with a gas supply line 43 as a flow path toward the opposite side to the cogeneration system 41, that is, a flow path for supplying natural gas to consumers. The gas supply line 43 is provided with a mixing tank 45 and an odorant cylinder 46 so that natural gas that can detect leakage on the consumer side is generated. That is, an odorant for odorizing natural gas is added from the odorant cylinder 46 immediately before the natural gas flows into the mixing tank 45, and then they are mixed evenly in the mixing tank 45. Thereby, since it becomes easy for a consumer to detect that natural gas leaked by the smell attached to natural gas, safety improves. Further, such a mixing tank 45 may function as a buffer tank that keeps the pressure of natural gas passing through the gas supply line 43 constant.

  Here, the cogeneration system 41 communicates with the liquid supply line 34 and the BOG line 35, and power is supplied to the outside by natural gas and BOG supplied through the liquid supply line 34 and the BOG line 35. It has become. On the other hand, the hot water tank 42 communicates with the cogeneration system 41 and generates hot water using exhaust heat output from the cogeneration system 41. Thus, the hot water produced | generated by the satellite base 2 side circulates through the LNG vaporizer 32 by the side of the bulk container 3 via the piping connection part 4c, and is supplied outside.

  In addition, a manual valve 401 and a control valve 402 are provided on the flow path from the liquid feed line 34 to the cogeneration system 41 so that the supply of natural gas circulating in the satellite base 2 can be adjusted. Among these, the manual valve 401 is a flow before the gas supply line 43 for supplying natural gas to the consumer, that is, a flow before the gas supply line 43 branches off from the flow path leading to the cogeneration system 41. It is provided on the street. As a result, the natural gas supplied to both the cogeneration system 41 and the consumer is controlled.

  On the other hand, on the flow path from the BOG line 35 to the cogeneration system 41, a control valve 303 and a manual valve 403 are provided. When the pressure in the bulk container 3 is high, the control valve 303 is opened to The cogeneration system 41 is supplied via the mixing tank 44. When the pressure in the bulk container 3 is low, the gas that vaporizes LNG is supplied to the cogeneration system 41 via the mixing tank 44 by opening the control valve 402. The control valves 303 and 402 are controlled by a control unit (not shown). In addition, a flow path to the discharge tower (vent stack) is formed between the mixing tank 44 and the cogeneration system 41. If the pressure in the bulk container 3 rises abnormally due to some situation, the control valve 404 is set. The system is opened to release the gas into the atmosphere and prevent the bulk container 3 or the pipe from being ruptured. The control valve 404 is controlled by a control unit (not shown).

  As described above, in the present embodiment, the bulk container 3 is connected to the cogeneration system 41 and the hot water tank 42 by piping so that the BOG generated in the LNG tank 31 can be consumed at the satellite base 2.

  In the present embodiment, since the LNG vaporizer 32 is mounted on the bulk container 3 side, the BOG generated in the LNG tank 31 can be heated on the bulk container 3 side and supplied to the cogeneration system 41. . That is, since BOG is normally generated at a low temperature below the freezing point, it can be handled as a gas at room temperature by passing through the LNG vaporizer 32. In this case, since the gas pipe made of an inexpensive material can be used for the pipe connection portion 4b into which the BOG flows, the cost of the equipment can be reduced.

  Furthermore, in this embodiment, since the LNG vaporizer 32 is mounted on the bulk container 3 side, for example, when performing open inspection or fault repair of the LNG vaporizer 32, it is easy to move to a repair shop or the like. It becomes. Thereby, since workability | operativity can be improved compared with the case where opening inspection or failure repair of the LNG vaporizer 32 is implemented in an installation, it also becomes possible to reduce the maintenance cost of an installation.

  The satellite base 2 is configured to be connectable to other bulk containers other than the bulk container 3 described above. In the example shown in FIG. 1, at least one or more connection ports that can be connected to other bulk containers are formed at points where the liquid feeding line 34 and the BOG line 35 are joined. That is, installation locations and connection ports where a plurality of bulk containers 3 can be installed in the satellite base 2 are formed in advance at a plurality of locations. Thereby, for example, natural gas can be continuously supplied to the consumer by performing an operation of switching to another bulk container before the operating bulk container 3 becomes empty.

  Here, the control operation of the control valves 303 and 305 will be described. FIG. 2 is a flowchart showing a control procedure of the natural gas supply system according to the embodiment of the present invention. Note that the processing of this system is executed mainly by a control unit (not shown).

As shown in the figure, first, when the natural gas supply system 1 operates (S1), natural gas vaporized by the LNG vaporizer 32 is generated (S2). Then, based on whether or not the pressure in the LNG tank 31 has increased, it is determined whether or not BOG has occurred (S3). That is, the line to be controlled differs depending on whether or not BOG is generated in the LNG tank 31.
BOG here occurs when LNG stored in the LNG tank 31 transitions from a supercooled state to a saturated state in several days. In this case, since the pressure in the LNG tank 31 rises, it is a general measure to process the generated BOG by mixing it into a gas supply line or the like. Such a BOG is not a problem if it is used up before the LNG becomes saturated. For example, the consumer targeted by the present embodiment may be a small ordinary house that may take a week or more before it is used up. As a result, it is necessary to process the BOG in some form. Due to such factors, processing differs depending on whether or not BOG has occurred in the LNG tank 31.

  Normally, BOG is generally mixed into the gas feed line 43, but it has been confirmed that the BOG output from the bulk container 3 has a methane content close to 100%, which is 10% of that of normal LNG. Since the heat generation amount is low, if the mixing ratio with respect to the gas supply line 43 is increased, the heat generation amount of the natural gas to be delivered is reduced. For example, when the amount of natural gas used at night is extremely small on the consumer side, it is assumed that only BOG flows through the gas supply line 43. In order to cope with such a situation, for example, in the supply regulations of the gas company, some measures regarding the calorific value are taken by setting a lower limit value regarding the calorific value of the natural gas to be delivered. In the present embodiment, the BOG generated in the LNG tank 31 is self-consumed by the cogeneration system 41, so that the BOG having a low calorific value is not mixed into the gas feed line 43 and the degree of the calorific value is not adjusted. Natural gas is supplied to consumers.

  Here, when no BOG is generated in the LNG tank 31 (S3; No), the LNG vaporized on the bulk container 3 side is output to the satellite base 2 side as it is and supplied to the consumer or the cogeneration system 41. (S4). Then, it is determined whether or not the amount of LNG stored in the LNG tank 31 is greater than or equal to a predetermined amount (S5). Here, when the storage amount of LNG is equal to or larger than the predetermined amount (S5; Yes), the process proceeds to step S4, and the vaporized LNG continues to be supplied to the consumer or the cogeneration system 41. On the other hand, when the stored amount of LNG is not equal to or greater than the predetermined amount (S5; No), by performing a switching operation for switching to another bulk container (S6), natural gas is supplied using the switched another bulk container. Continue to operate system 1. Thereby, before the bulk container 3 in operation becomes empty, another full bulk container is connected so that natural gas can be continuously supplied to the consumer.

  On the other hand, when BOG is generated in the LNG tank 31 (S3; Yes), it is determined whether or not the pressure in the LNG tank 31 is equal to or higher than a predetermined pressure (S7). If the pressure is equal to or higher than the predetermined pressure (S7; Yes), the control valve 303 is opened to open the BOG line 35, and the control valve 305 is closed to close the pressurization line 36 (S8). That is, since it is necessary to consume BOG, it is switched to using BOG. Then, the BOG is output from the opened BOG line 35 to the cogeneration system 41 (S9). On the other hand, when the pressure is not higher than the predetermined pressure (S7; No), the control valve 305 is opened to open the pressurization line 36, and the control valve 303 is closed to close the BOG line 35 (S10). That is, since the BOG is not yet consumed, the inside of the LNG tank 31 is pressurized and the use of natural gas is continued. And the inside of the LNG tank 31 is pressurized, and LNG is sent to the liquid feeding line 34 (S11). The LNG delivered to the liquid feed line 34 is vaporized by the LNG vaporizer 32 and supplied to the cogeneration system 41 as natural gas (S12). In the meantime, similarly, whether or not BOG is generated in the LNG tank 31 is monitored.

  As described above, according to the present embodiment, the LNG vaporizer 32 corresponding to the vaporization function on the satellite base 2 side is mounted on the bulk container 3 side to unitize the natural gas directly from the bulk container 3 side. Can be supplied to consumers. In this way, in the present embodiment, it is possible to construct a superior facility in terms of multifaceted factors such as operability, safety, cost, and downsizing of the facility.

(Other embodiments)
In the above-described embodiment, it is assumed that the satellite base 2 is installed in the vicinity of a consumer's house without a gas conduit. However, the present invention is not limited to this. For example, a satellite base is installed in a suburban supermarket or convenience store. 2 may be installed. As a result, natural gas can be easily supplied to suburban houses or businesses. For example, the heat and electricity supplied from the cogeneration system 41 can be used, and it is also possible to perform an initial response and notification when a daily inspection or trouble occurs. In this case, for example, it may be possible to have a system in which a specialized worker performs remote monitoring and rushes when trouble occurs.

It is a figure which shows the system configuration | structure of the natural gas supply system which concerns on one Embodiment of this invention. It is a flowchart which shows the control procedure of the natural gas supply system which concerns on one Embodiment of this invention.

Explanation of symbols

2 Satellite base 3 Bulk container 4 (4a, 4b, 4c) Piping connection 31 LNG tank 32 LNG vaporizer 33 Vehicle 34 Liquid feed line 35 BOG line 36 Pressure line 41 Cogeneration system (cogeneration system)
42 Hot water tank 43 Gas supply line 44, 45 Mixing tank 46 Odorant cylinder 301, 303, 305, 402, 404 Control valve 302, 304, 401, 403 Manual valve

Claims (6)

A natural gas supply system that continuously supplies natural gas from LNG that has been transported from the outside to consumers at least in areas without a gas conduit at a satellite base,
An LNG tank for storing the LNG;
An LNG vaporizer that vaporizes LNG delivered from the LNG tank;
A bulk container in which the LNG tank and the LNG vaporizer are installed;
The LNG vaporizer is mounted on a vehicle in which the LNG tank is installed, and the bulk container side is connected via a liquid feed line formed as a flow path by pipe connection between the LNG vaporizer and the satellite base. The natural gas supply system is characterized in that LNG vaporized in the above is supplied from a satellite base as natural gas. The satellite base includes a cogeneration system that supplies electric power and a hot water tank that communicates with the cogeneration system and supplies hot water generated from exhaust heat output from the cogeneration system.
The natural container according to claim 1, wherein the bulk container is connected to the cogeneration system and the hot water tank by piping so that BOG generated in the LNG tank is consumed at the satellite base. Gas supply system. The bulk container is provided with a pressurization line that pressurizes the inside of the LNG tank and sends out LNG, and opens and closes a control valve provided in the pressurization line according to a difference in pressure state in the LNG tank. The natural gas supply system according to claim 1 or 2, wherein The natural gas supply system according to any one of claims 1 to 3, wherein the satellite base includes a plurality of connection ports that can be connected to other bulk containers. The natural gas supply system according to any one of claims 1 to 4, wherein the satellite base supplies natural gas mixed with odor. In a satellite base, a natural gas supply method for continuously supplying natural gas from LNG that has been transported from the outside to consumers in areas where there is no gas conduit,
An LNG vaporizer that vaporizes LNG delivered from the LNG tank is mounted on a vehicle in which a bulk container for installing the LNG tank for storing the LNG is installed, and the LNG vaporizer and the satellite base are installed. A natural gas supply method characterized in that LNG vaporized on the bulk container side is supplied as a natural gas from a satellite base through the flow path by forming a flow path by connecting pipes.