JP2023086300A - Liquefied gas dispensing equipment - Google Patents

Abstract

A liquefied gas dispensing facility provided with a plurality of pressure vessels for storing liquefied gas is improved in design flexibility. A liquefied gas delivery facility includes a plurality of pressure vessels for storing liquefied gas and a support structure for supporting the plurality of pressure vessels. a support structure for supporting the vessel such that the first pressure vessel is above the second pressure vessel; an inlet below the first pressure vessel; an outlet; A heat exchanger that vaporizes the liquefied gas that has flowed in and flows out from the outlet, a liquid flow path that guides the liquefied gas from the first pressure vessel to the inlet of the heat exchanger, and the vaporized gas that has flowed out from the outlet of the heat exchanger. to the second pressure vessel, and a discharge passage extending from the second pressure vessel for discharging the liquefied gas from the second pressure vessel. [Selection drawing] Fig. 1

Description

The present disclosure relates to liquefied gas dispensing equipment.

2. Description of the Related Art Conventionally, as a facility for discharging a liquefied gas such as a liquefied natural gas from a pressure vessel that stores the liquefied gas, there has been known a system that discharges the liquefied gas by pressurizing the gas phase inside the pressure vessel. In FIG. 2 of Patent Document 1, the storage liquid in the storage tank is introduced through a circulation line into a tank pressurization vaporizer to be evaporated, and the evaporated gas is returned to the gas phase portion at the top of the tank to return the tank to A pressurized dispensing system is disclosed.

Patent No. 4832633

By the way, in the facility for storing liquefied gas, it is more advantageous in terms of the construction period and cost required to install the storage facility to have a configuration in which multiple tanks are combined rather than a configuration in which one large tank is installed. may become.

Therefore, an object of the present disclosure is to provide a liquefied gas delivery facility having a plurality of pressure vessels for storing liquefied gas, which can improve the degree of freedom in design.

In order to solve the above problems, a liquefied gas delivery facility according to an aspect of the present disclosure includes a plurality of pressure vessels storing liquefied gas, and a support structure supporting the plurality of pressure vessels, wherein the plurality a support structure for supporting a first pressure vessel and a second pressure vessel of the pressure vessels such that the first pressure vessel is positioned above the second pressure vessel; a heat exchanger for vaporizing liquefied gas entering from the inlet and flowing out from the outlet; and the flow from the first pressure vessel to the heat exchanger. a liquid flow path for guiding a liquefied gas to an inlet; a gas flow path for guiding the vaporized gas flowing out of the outlet of the heat exchanger to the second pressure vessel; and a payout flow path for paying out the liquefied gas from.

Advantageous Effects of Invention According to the present disclosure, it is possible to provide a liquefied gas delivery facility that is equipped with a plurality of pressure vessels that store liquefied gas and that can improve the degree of freedom in design.

FIG. 1 is a schematic configuration diagram of a liquefied gas delivery facility according to one embodiment. FIG. 2 is a schematic side view of a plurality of pressure vessels and support structures shown in FIG. 1; 3 is a schematic front view of a liquefied gas delivery facility according to Modification 1. FIG. FIG. 4 is a schematic front view of a liquefied gas delivery facility according to Modification 2. FIG.

Hereinafter, a liquefied gas delivery facility according to one embodiment will be described with reference to the drawings. In this specification, the terms "upstream" and "downstream" respectively mean upstream and downstream in the direction of flow of the liquefied gas or its vaporized gas.

FIG. 1 is a schematic front view of a liquefied gas delivery facility 1A according to one embodiment. The liquefied gas delivery facility 1A is installed on land. The liquefied gas dispensing facility 1A includes a plurality of pressure vessels 2 that store liquefied gas and a support structure 10 that supports the plurality of pressure vessels 2 . In this embodiment, the liquefied gas stored in the pressure vessel 2 is liquefied hydrogen. However, the liquefied gas may be another type of liquefied gas such as liquefied natural gas or liquefied petroleum gas.

The plurality of pressure vessels 2 have the same shape and size as each other. Each pressure vessel 2 is capable of storing liquefied gas under high pressure. FIG. 1 shows a cross-sectional shape of the pressure vessel 2 viewed from the front. As shown in FIG. 1, in this embodiment, the pressure vessel 2 constitutes a double shell tank together with an outer tank 3 covering the pressure vessel 2 .

FIG. 2 is a schematic side view of a plurality of pressure vessels 2 and support structures 10 shown in FIG. In FIG. 2, the pressure vessel 2 is indicated by a dashed line, and a heat exchanger 30 and various flow paths to be described later are omitted. As shown in FIG. 2, the pressure vessel 2 and the outer tank 3 in the double-hulled tank are identical to each other and are horizontal cylinders. The space between the pressure vessel 2, which is the inner tank, and the outer tank 3 may be, for example, a vacuum, or may be provided with a heat insulating material.

The plurality of pressure vessels 2 are arranged in the same direction so that the horizontally extending central axes of the pressure vessels 2 are parallel to each other. Moreover, the plurality of pressure vessels 2 includes a first pressure vessel 2a and a second pressure vessel 2b whose vertical positions are different from each other. In this embodiment, the second pressure vessel 2b is arranged directly below the first pressure vessel 2a. That is, the first pressure vessel 2a and the second pressure vessel 2b are arranged at positions overlapping each other when viewed in the vertical direction.

The support structure 10 supports the first pressure vessel 2a and the second pressure vessel 2b such that the first pressure vessel 2a is positioned above the second pressure vessel 2b. For example, the support structure 10 includes a plurality of vertically extending upper and lower frames and a plurality of horizontally extending horizontal frames connecting the plurality of upper and lower frames. Also, the support structure 10 is a hierarchical structure having a plurality of floors 11 . That is, the support structure 10 has a floor 11a that supports the first pressure vessel 2a from below between the first pressure vessel 2a and the second pressure vessel 2b in the vertical direction, and the floor 11a that supports the first pressure vessel 2a from below. has a floor 11b that supports the second pressure vessel 2b from below. More specifically, the outer tub 3 is supported by a pair of supports 4 provided on the floor 11 at positions spaced apart in the axial direction of the outer tub 3, that is, in the horizontally extending direction of the outer tub 3. , the pressure vessel 2 which is an inner tank is supported by a support member arranged between the pressure vessel 2 and the outer tank 3 . Thus, in the support structure 10, the second pressure vessel 2b is arranged on the first floor and the first pressure vessel 2a is arranged on the second floor.

A first introduction channel 21 is connected to the upper portion of the first pressure vessel 2a. A second introduction flow path 22 is connected to the upper portion of the second pressure vessel 2b. The first introduction channel 21 is a channel for introducing the liquefied gas into the first pressure vessel 2a, and the second introduction channel 22 is a channel for introducing the liquefied gas into the second pressure vessel 2b. be.

One end of the first introduction channel 21 is connected to the upper part of the first pressure vessel 2a, and the other end of the first introduction channel 21 is connected to another storage container for storing liquefied gas. Or it is connectable. One end of the second introduction channel 22 is connected to the upper portion of the second pressure vessel 2b, and the other end of the second introduction channel 22 is connected to the middle of the first introduction channel 21 . An on-off valve 21a is provided in a portion of the first introduction passage 21 on the downstream side of the branch of the second introduction passage 22, and an on-off valve 22a is provided in the second introduction passage 22. As shown in FIG.

A connection flow path 23 connects the lower portion of the first pressure vessel 2a and the upper portion of the second pressure vessel 2b. An on-off valve 23 a for opening and closing the connection channel 23 is arranged in the connection channel 23 . By opening the on-off valve 23a, the liquefied gas in the first pressure vessel 2a flows to the second pressure vessel 2b through the connection channel 23 without power.

A discharge channel 24 is connected to the lower portion of the second pressure vessel 2b. The discharge channel 24 extends from the second pressure vessel 2b and discharges the liquefied gas from the second pressure vessel 2b. The dispensing flow path 24 is provided with an on-off valve 24a.

The liquefied gas delivery facility 1A includes a heat exchanger 30 for pressurizing the gas phase portion in the second pressure vessel 2b. The heat exchanger 30 has an inflow port 31 and an outflow port 32 , vaporizes the liquefied gas that has flowed in from the inflow port 31 , and causes the vaporized gas to flow out from the outflow port 32 . A heat exchanger 30 is located outside the support structure 10 . However, the heat exchanger 30 may be arranged inside the support structure 10 . In this embodiment, the heat exchanger 30 is of an atmospheric heat exchange type that exchanges heat between the liquefied gas and the atmosphere. It may be of another type such as performing.

The heat exchanger 30 is located below the first pressure vessel 2a. The heat exchanger 30 and the second pressure vessel 2b are arranged at approximately the same height. The heat exchanger 30 and the second pressure vessel 2b are arranged to overlap each other when viewed from the side, in other words, when viewed in the horizontal direction.

The lower portion of the first pressure vessel 2 a and the inlet 31 of the heat exchanger 30 are connected by a liquid flow path 41 . The liquid flow path 41 guides the liquefied gas from the first pressure vessel 2 a to the heat exchanger 30 . The liquid flow path 41 is provided with an on-off valve 41 a for opening and closing the liquid flow path 41 . The inlet 31 is located below the first pressure vessel 2a. Therefore, by opening the on-off valve 41a, the liquefied gas flows from the first pressure vessel 2a to the heat exchanger 30 through the liquid flow path 41 without using a pump or the like.

The outflow port 32 of the heat exchanger 30 and the upper portion of the second pressure vessel 2b are connected by a gas flow path 42 . The gas flow path 42 guides the vaporized gas that has flowed out from the outlet 32 of the heat exchanger 30 to the second pressure vessel 2b. The gas phase portion of the second pressure vessel 2b is pressurized by the vaporized gas guided through the gas flow path 42 . When the gas phase portion of the second pressure vessel 2b is pressurized while the on-off valve 24a provided in the dispensing flow path 24 is open, the pressure of the gas phase portion acts on the liquid surface of the second pressure vessel. The liquefied gas is discharged through the discharge channel 24 from 2b.

As described above, according to the liquefied gas delivery facility 1A according to the present embodiment, since there is the inlet 31 of the heat exchanger 30 located below the first pressure vessel 2a, the liquefied gas is discharged from the first pressure vessel 2a. The liquefied gas is led to the heat exchanger 30 through the liquid flow path 41 without using a pump. The gas vaporized in the heat exchanger 30 is guided to the second pressure vessel 2b through the gas flow path 42. As shown in FIG.

Therefore, even though the heat exchanger 30 and the second pressure vessel 2b are positioned at the same height, the second pressure is generated without power regardless of the positional relationship between the heat exchanger 30 and the second pressure vessel 2b. The gas phase in the container 2b can be pressurized, and the liquefied gas can be discharged from the second pressure container 2b. Therefore, the degree of freedom in designing the liquefied gas delivery facility 1A can be improved.

Moreover, in this embodiment, the second pressure vessel 2b is arranged at a position overlapping the heat exchanger 30 when viewed from the side. In other words, the second pressure vessel 2b and the heat exchanger 30 are not vertically separated. Therefore, the gas flow path 42 connecting the second pressure vessel 2b and the heat exchanger 30 can be shortened in the vertical direction.

In addition, in the present embodiment, the second pressure vessel 2b is arranged at a position overlapping the first pressure vessel 2a when viewed from above. By using it as an installation space, it is possible to suppress the occurrence of dead space in the support structure 10 .

In this embodiment, the support structure 10 is provided with a floor 11a between the first pressure vessel 2a and the second pressure vessel 2b to support the first pressure vessel 2a from below. Therefore, even if the first pressure vessel 2a is located several meters above the ground surface, the presence of the floor 11a on which the operator can place his/her feet facilitates maintenance and inspection of the first pressure vessel 2a. easier to do.

In addition, in the present embodiment, since the plurality of pressure vessels 2 are horizontal cylinders, compared to the case where pressure vessels of other shapes are used, the entire liquefied gas delivery facility 1A can be height can be reduced.

Further, in this embodiment, the liquefied gas introduced into the first pressure vessel 2a through the first introduction channel 21 can be sent through the connection channel 23 to the second pressure vessel 2b. Therefore, it is easy to adjust the amount of liquefied gas inside each of the first pressure vessel 2a and the second pressure vessel 2b.

Both the second introduction flow path 22 and the connection flow path 23 are connected to the second pressure vessel 2b. Therefore, depending on which one of the on-off valves 22a and 23a provided in the second introduction passage 22 and the connection passage 23 is opened, the second introduction passage 22 and the connection passage 23 through which the second introduction passage 22 and the connection passage 23 are opened. It is possible to select whether to supply the liquefied gas to the pressure vessel 2b, and it is easier to adjust the amount of liquefied gas inside each vessel of the first pressure vessel 2a and the second pressure vessel 2b.

Further, by sending the liquefied gas in the first pressure vessel 2a to the second pressure vessel 2b through the connection channel 23, the first pressure vessel 2a can be The liquefied gas inside can be paid out.

(Modification 1)
Next, a liquefied gas delivery facility 1B according to Modification 1 will be described with reference to FIG. It should be noted that, with respect to modified example 1 and modified example 2, which will be described later, portions different from the above embodiment will be mainly described.

A liquefied gas dispensing facility 1B according to Modification 1 includes a second gas flow path 43 branched from a gas flow path (hereinafter referred to as “first gas flow path”) 42 . A downstream end of the second gas flow path 43 is connected to an upper portion of the first pressure vessel 2a. The second gas flow path 43 guides the vaporized gas vaporized in the heat exchanger 30 to the first pressure vessel 2a. Further, an on-off valve 42a is provided in a portion of the first gas flow path 42 on the downstream side of the part where the second gas flow path 43 branches, and the second gas flow path 43 is provided with an on-off valve 43a. ing.

In addition, the liquefied gas payout facility 1B according to Modification 1 further includes a second payout channel 25 that merges with a downstream portion of the payout channel (hereinafter referred to as "first payout channel") 24 from the on-off valve 24a. Prepare. The upstream end of the second gas flow path 43 is connected to the lower portion of the first pressure vessel 2a. The second dispensing flow path 25 is provided with an on-off valve 25a.

The on-off valve 43a of the second gas passage 43 and the on-off valve 25a of the second discharge passage 25 are used when pressurizing the gas phase portion of the first pressure vessel 2a to discharge the liquefied gas from the first pressure vessel 2a. be opened. The on-off valve 42a of the first gas passage 42 and the on-off valve 24a of the first discharge passage 24 pressurize the gas phase portion of the second pressure vessel 2b to discharge the liquefied gas from the second pressure vessel 2b. opened in case Only one of the pair of the on-off valves 43a and 25a and the pair of the on-off valves 42a and 24a may be opened, or all of the on-off valves 43a, 25a, 42a and 24a may be opened at the same time.

The same effects as those of the above-described embodiment can be obtained in the first modification as well. Further, in Modification 1, the liquefied gas can be discharged directly from the first pressure vessel 2a without going through the second pressure vessel 2b.

Further, in Modification 1, the on-off valves 43a, 25a, 42a, and 24a may be omitted. That is, although it was possible to select the container from which the liquefied gas is discharged from the first pressure vessel 2a and the second pressure vessel 2b, when the on-off valve 41a is opened, the first pressure vessel 2a and the second pressure vessel Liquefied gas may be delivered from both 2b.

In addition, in Modification 1, the second delivery channel 25 may join the upstream portion of the first delivery channel 24 from the opening/closing valve 24a, and the opening/closing valve 24a allows the first pressure vessel 2a and the second pressure vessel 2a to be separated from each other. It may be possible to simultaneously stop the delivery of both liquefied gases to the pressure vessel 2b.

(Modification 2)
Next, a liquefied gas delivery facility 1C according to Modification 2 will be described with reference to FIG.

A liquefied gas delivery facility 1C according to Modification 2 includes, as shown in FIG. 4, three first pressure vessels 2a and six second pressure vessels 2b. The support structure 10 has a three-layer structure, three first pressure vessels 2a are arranged on the third floor, which is the top floor, and three second pressure vessels 2b are arranged on each of the first and second floors. ing.

In Modified Example 2, the liquefied gas can be discharged from each of the nine pressure vessels 2 . That is, the first gas flow path 42 includes an upstream flow path 42b located on the upstream side and a downstream flow path 42c branching from the upstream flow path 42b toward each of the six second pressure vessels 2b. include. Further, similarly to Modification 1, the liquefied gas delivery facility 1C includes a second gas flow path 43 branched from the first gas flow path 42 . The second gas flow path 43 includes an upstream flow path 43b located on the upstream side and a downstream flow path 43c branching from the upstream flow path 43b toward each of the three first pressure vessels 2a.

For the sake of simplification of the drawing, in FIG. Also, the passage for introducing the liquefied gas into the pressure vessel 2 is omitted. The on-off valves provided in the first gas flow path 42 and the second gas flow path 43 are also omitted.

In Modified Example 2, the liquid flow path 41 includes a plurality of upstream flow paths 41 b extending from the plurality of first pressure vessels 2 a and a plurality of upstream flow paths 41 b merging to flow into the inlet 31 of the heat exchanger 30 . and one extending downstream channel 41c. An on-off valve 41a is provided in the downstream channel 41c. In this way, it is possible to lead the liquefied gas to the heat exchanger 30 from a plurality of first pressure vessels 2a. Therefore, it is easier to ensure the liquefied gas to be led to the heat exchanger 30 than when the liquefied gas is led to the heat exchanger 30 from one first pressure vessel 2a.

The same effects as those of the above-described embodiment can be obtained also in the second modified example.

In addition, in Modification 2, an on-off valve may be provided in each of the plurality of upstream flow paths 41b. In this case, it is possible to select from which one of the plurality of first pressure vessels 2 a the liquefied gas is sent to the heat exchanger 30 .

In addition, as in the above-described embodiment, Modification Example 2 may also include a connection flow path 23 and an on-off valve 23a that connect the lower portion of the first pressure vessel 2a and the upper portion of the second pressure vessel 2b. In this case, the connection channel 23 may be configured to connect the lower portions of the plurality of first pressure vessels 2a and one second pressure vessel 2b, or connect the lower portions of the one first pressure vessel 2a and the plurality of pressure vessels 2b. may be configured to be connected to the second pressure vessel 2b.

<Other embodiments>
The present disclosure is not limited to the above-described embodiment and modified examples 1 and 2, and the configuration can be changed, added, or deleted.

For example, the number and arrangement of the first pressure vessel and the second pressure vessel, the position of the heat exchanger with respect to the support structure, etc. can be changed as appropriate. The liquefied gas delivery facility may not be installed on land, and may be installed, for example, on the hull. The pressure vessel need not be a horizontal cylinder, but may be another shape such as a sphere.

The first pressure vessel and the second pressure vessel may not be arranged to overlap each other when viewed in the vertical direction, and may be horizontally separated from each other. The first pressure vessel and the second pressure vessel need not be the same size as each other. No liquefied gas may be withdrawn from the first pressure vessel. That is, the first pressure vessel may be a dedicated tank for supplying liquefied gas to the heat exchanger. The positions of the inlet and outlet in the heat exchanger can also be changed as appropriate.

The second pressure vessel may not be arranged at a position overlapping the heat exchanger when viewed from the side. For example, the heat exchanger may be arranged between the first pressure vessel and the second pressure vessel in the vertical direction. may Further, in the above-described embodiment, there may be no connection channel connecting the lower portion of the first pressure vessel and the upper portion of the second pressure vessel.

There may be no floor supporting the first pressure vessel from below in the support structure. The support structure may also be constructed, for example, by stacking a plurality of liquefied gas containers. Specifically, the support structure has multiple structures that are separable from each other. Each structure includes a plurality of frames, and is configured in a substantially rectangular parallelepiped shape by connecting the plurality of frames. Each structure then supports the pressure vessel such that, for example, the pressure vessel is positioned in an area surrounded by a plurality of frames. A first structure supporting a first pressure vessel is secured to one another while being stacked over a second structure supporting a second pressure vessel. In this manner, a support structure may be provided to support multiple pressure vessels. Since each pressure vessel can be moved together with the structure, it facilitates the manufacture and assembly of the liquefied gas dispensing equipment.

Not only the pressure vessel at the highest position among the pressure vessels, but also the pressure vessel at the lower position can be the "first pressure vessel" that supplies the liquefied gas to the heat exchanger. For example, in Variation 2 above, the three pressure vessels located on the second floor of the support structure 10 are also located above the inlets of the heat exchangers. Therefore, if the three pressure vessels arranged on the second floor and the inlet of the heat exchanger are connected by the liquid flow path, the three pressure vessels arranged on the second floor become the first pressure vessel.

The on-off valves described in the above embodiments and the like are not particularly limited as long as they enable or block the flow of fluid. For example, the on-off valve may be a pressure control valve, a flow control valve, or the like.

A liquefied gas dispensing facility according to an aspect of the present disclosure includes a plurality of pressure vessels storing liquefied gas, and a support structure supporting the plurality of pressure vessels, wherein a first pressure among the plurality of pressure vessels a support structure for supporting a vessel and a second pressure vessel such that the first pressure vessel is positioned above the second pressure vessel; an inlet positioned below the first pressure vessel; and an outlet. and a heat exchanger for vaporizing the liquefied gas flowing in from the inlet and flowing out from the outlet; and a liquid flow path for guiding the liquefied gas from the first pressure vessel to the inlet of the heat exchanger. a gas flow path for guiding the vaporized gas flowing out of the outlet of the heat exchanger to the second pressure vessel; and a discharge flow path extending from the second pressure vessel for discharging the liquefied gas from the second pressure vessel. And prepare.

According to the above configuration, since the inlet of the heat exchanger is located below the first pressure vessel, the liquefied gas discharged from the first pressure vessel flows through the heat exchanger through the liquid flow path without using a pump. led to. The gas vaporized in the heat exchanger is led to the second pressure vessel through the gas flow path. Therefore, regardless of the positional relationship between the heat exchanger and the second pressure vessel, the gas phase portion in the second pressure vessel can be pressurized without power, and the liquefied gas can be discharged from the second pressure vessel. Therefore, the degree of freedom in designing the liquefied gas delivery facility can be improved.

Further, in the liquefied gas delivery facility, the second pressure vessel may be arranged at a position overlapping the heat exchanger when viewed from the side. According to this configuration, since the second pressure vessel and the heat exchanger are not separated in the vertical direction, the gas flow path 42 connecting the second pressure vessel and the heat exchanger can be shortened in the vertical direction.

Moreover, in the liquefied gas delivery facility, the second pressure vessel may be arranged at a position overlapping the first pressure vessel when viewed from above. According to this configuration, by using the space below the first pressure vessel as the installation space for the second pressure vessel, it is possible to suppress the occurrence of dead space in the support structure.

Further, in the liquefied gas delivery facility, the support structure has a floor that supports the first pressure vessel from below between the first pressure vessel and the second pressure vessel in the vertical direction. good too. According to this configuration, even if the first pressure vessel is located at a height of several meters or more above the ground surface, the presence of the floor on which the operator can put his/her feet allows maintenance and inspection of the first pressure vessel and the like. easier to do.

Further, in the liquefied gas delivery facility, the plurality of pressure vessels may be horizontal cylindrical. Compared to using pressure vessels of other shapes, the use of horizontal cylindrical pressure vessels as multiple pressure vessels reduces the overall height of the liquefied gas dispensing equipment while securing storage capacity. be able to.

Further, the liquefied gas dispensing equipment includes an introduction passage for introducing the liquefied gas into the first pressure vessel, a connection passage for connecting the lower part of the first pressure vessel and the upper part of the second pressure vessel, An on-off valve that opens and closes the connection channel may be further provided. According to this configuration, the liquefied gas introduced into the first pressure vessel through the introduction channel can be sent to the second pressure vessel through the connection channel. Therefore, it is easy to adjust the amount of liquefied gas inside each of the first pressure vessel and the second pressure vessel.

1A, 1B, 1C: liquefied gas dispensing equipment 2: pressure vessel 2a: first pressure vessel 2b: second pressure vessel 10: support structure 11a: floor 21: first introduction channel 23: connection channel 23a: on-off valve 24: discharge channel, first discharge channel 30: heat exchanger 31: inlet 32: outlet 32a: on-off valve 41: liquid channel 41a: on-off valve 41b: upstream channel 41c: downstream channel 42 : Gas channel, first gas channel

Claims (6)

a plurality of pressure vessels storing liquefied gas;
A support structure for supporting the plurality of pressure vessels, wherein the first pressure vessel and the second pressure vessel of the plurality of pressure vessels are positioned above the second pressure vessel. a support structure that supports to
a heat exchanger having an inlet located below the first pressure vessel and an outlet, wherein the liquefied gas that has flowed in from the inlet is vaporized and flows out from the outlet;
a liquid flow path for guiding liquefied gas from the first pressure vessel to the inlet of the heat exchanger;
a gas flow path that guides the vaporized gas flowing out of the outlet of the heat exchanger to the second pressure vessel;
a liquefied gas dispensing facility, comprising: a dispensing channel extending from the second pressure vessel and dispensing liquefied gas from the second pressure vessel. The liquefied gas delivery facility according to claim 1, wherein said second pressure vessel is arranged at a position overlapping with said heat exchanger when viewed in a horizontal direction. The liquefied gas delivery facility according to claim 1 or 2, wherein said second pressure vessel is arranged at a position overlapping with said first pressure vessel when viewed from above. 4. The support structure according to any one of claims 1 to 3, wherein the support structure has a floor that supports the first pressure vessel from below between the first pressure vessel and the second pressure vessel in the vertical direction. Liquefied gas dispensing equipment as described. The liquefied gas delivery facility according to any one of claims 1 to 4, wherein the plurality of pressure vessels are horizontal cylindrical. an introduction channel for introducing liquefied gas into the first pressure vessel;
a connection flow path connecting the lower portion of the first pressure vessel and the upper portion of the second pressure vessel;
The liquefied gas delivery facility according to any one of claims 1 to 5, further comprising an on-off valve that opens and closes the connection flow path.

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