JP2006349133A - Low temperature liquefied gas storing device, and power generating device and movable body having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquefied fuel gas storing device, and a power generating device and a movable body having the same, capable of effectively utilizing a boil off gas at low cost. <P>SOLUTION: This low temperature liquefied gas storing device is composed of a storing container 11 for storing a low-temperature liquefied gas F, a heat insulating structure 12 for thermally insulating the inside of the storing container 11 from its circumference, an adsorbent storing container 21 mounted in the storing container 11 and defining a space isolated from a space inside of the storing container 11, inside thereof, a carbon adsorbent 13 mounted in the adsorbent storing container 21, a gas circulation control device 22 for controlling the circulation of a gas between the inside of the storing container 11 and the inside of the adsorbent storing container 21, and a heat transfer device for transferring the cold in the storing container 11 to the carbon adsorbent 13. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a low-temperature liquefied gas storage device that stores natural gas, propane gas, hydrogen gas or the like as a low-temperature liquefied gas, and a power generation device that generates power using fuel gas extracted from the low-temperature liquefied gas storage device And the moving body.

As an apparatus for storing gas, there is a low-temperature liquefied gas storage apparatus that stores gas in a cooled and liquefied state.
Since the volume of gas is remarkably reduced by liquefying, the low-temperature liquefied gas storage device can be smaller than a gas storage device that stores the same amount of gas as it is.
Therefore, the low-temperature liquefied gas storage device is a tanker storage tank for transporting gas, a fuel storage device for a power generation device such as an internal combustion engine, a steam turbine, or a fuel cell, or a fuel storage device for a mobile body such as a tanker or an automobile. Is preferably used.

In the low-temperature liquefied gas storage device, when the low-temperature liquefied gas is stored for a long time, a part of the stored low-temperature liquefied gas is vaporized by receiving heat flowing in from the outside of the device, so that the internal pressure gradually increases (this Vaporized gas is generally called boil-off gas).
For this reason, in the low-temperature liquefied gas storage device, excess boil-off gas is discharged out of the device or converted into low-temperature liquefied gas again by the re-liquefaction device so that the internal pressure is maintained within an appropriate range, and again in the device. I am trying to store it.

When this surplus boil-off gas is released into the atmosphere, it is a pure gas loss. Further, when the excess boil-off gas is reliquefied using the reliquefaction apparatus, the equipment becomes large and the operation cost increases.
Here, in a tanker or the like that transports fuel gas, excess boil-off gas can be used as fuel for the power source. However, while the amount of boil-off gas generated per unit time is almost constant, the fuel gas consumption of the tanker power source varies greatly depending on the operating state of the tanker. Therefore, it is difficult to properly process the surplus boil-off gas.
Therefore, in the liquefied natural gas storage device described in Patent Document 1 described later, an adsorbent that adsorbs natural gas is provided, and excess boil-off gas is adsorbed and collected by the adsorbent.

JP-A-11-351498

However, the adsorbent can adsorb gas only about several percent of its own weight. For this reason, in order to adsorb | suck all the surplus boil-off gases, it is necessary to use a lot of adsorption materials, and an apparatus will enlarge and cost will increase.
In general, the low-temperature liquefied gas is not used at a low temperature but is used after being heated to about room temperature. For example, in a fuel cell, the device is damaged when the water generated inside is frozen, so the fuel gas is heated to a temperature at which the water is not frozen by a heater or the like. For this reason, the cold heat imparted to the fuel gas to liquefy the fuel gas is discarded without being effectively used, resulting in poor energy efficiency.

  Also, in a tanker that transports fuel gas, when the liquefied fuel gas is landed, the liquefied fuel gas should not be crushed by the pressure difference between the inside and outside due to the decrease in internal pressure due to the extraction of the liquefied fuel gas from the storage tank. In order to replace it with gas, it was necessary to obtain gas for maintaining internal pressure from the landing site.

  The present invention has been made in view of such circumstances, and provides a liquefied fuel gas storage device capable of effectively using boil-off gas at a low cost, a power generation device having the same, and a moving body. With the goal.

In order to solve the above problems, the present invention employs the following means.
The present invention has a storage container for storing a low-temperature liquefied gas, a heat insulating structure for insulating between the storage container and its surroundings, and a carbon-based adsorbent provided in an ledge portion in the storage container. A cryogenic liquefied gas storage device is provided.

Generally, it is known that the adsorbent used for gas adsorption increases the gas adsorption amount as the pressure in the surrounding atmosphere increases.
As a result of experiments, the present inventors have found that carbon-based adsorbents such as activated carbon and CNT (carbon nanotubes) have a large change in gas adsorption amount (gas retention amount) with respect to temperature change, It has the property of adsorbing more gas as the temperature is lowered, and in particular, the amount of gas adsorbed is lower than the temperature range generally used as an adsorbent (near room temperature). It was discovered that the amount of adsorbent adsorbed far exceeded that of the adsorbent. In other words, the carbon-based adsorbent has the property of rapidly reducing the amount of gas adsorbed as the temperature rises and quickly releasing the adsorbed gas. The present invention has been made based on such a novel discovery.

In this low-temperature liquefied gas storage device, a carbon-based adsorbent is installed in the ledge portion of the storage container (a region where the boil-off gas in the upper part of the storage container is stored). For this reason, in a state where the low-temperature liquefied gas is stored in the storage container, the carbon-based adsorbent is cooled by the cryogenic boil-off gas and kept at a very low temperature, and a large amount of carbon-based adsorbent is stored. Adsorb gas.
In this state, when the boil-off gas in the storage container increases and the internal pressure of the storage container rises, the carbon-based adsorbent adsorbs more gas, so that an increase in the internal pressure in the storage container is suppressed.

On the other hand, when the low-temperature liquefied gas or boil-off gas is taken out from the storage container, the internal pressure of the storage container decreases. When the internal pressure of the storage container decreases in this way, the gas adsorption capacity of the carbon-based adsorbent decreases and gas is released into the storage container. Therefore, the gas adsorbed by the carbon-based adsorbent must be taken out and used effectively. Can do.
In addition, since the carbon-based adsorbent releases gas as the internal pressure of the storage container decreases in this way, the internal pressure decrease in the storage container is suppressed, and gas is supplied into the storage container to maintain the internal pressure. There is no need to do this, or only a small amount of gas is supplied.

Thus, in this low-temperature liquefied gas storage device, the adsorption and release of gas by the carbon-based adsorbent is performed as the internal pressure of the storage container changes. In this low-temperature liquefied gas storage device, the amount of gas adsorbed and released by the carbon-based adsorbent is large, so that the internal pressure of the storage container can be properly maintained without increasing the size of the entire device.
In this low-temperature liquefied gas storage device, since the carbon-based adsorbent is provided in the storage container having a heat insulating structure, the space in the storage container can be used effectively, and the carbon-based adsorbent can be used at a cryogenic temperature. Therefore, it is not necessary to newly provide a heat insulating structure for maintaining the temperature, so that the entire apparatus can be reduced in size.

  The present invention also provides a storage container for storing a low-temperature liquefied gas, a heat insulating structure for insulating between the storage container and its surroundings, and the storage provided in or inside the storage container. An adsorbent storage container that forms a space isolated from the space in the container, a carbon-based adsorbent provided in the adsorbent storage container, and between the storage container and the adsorbent storage container. There is provided a low-temperature liquefied gas storage device having a gas flow control device for controlling the flow of the gas and a heat transfer device for transferring the cold heat in the storage container to the carbon-based adsorbent.

  In this low-temperature liquefied gas storage device, a carbon-based adsorbent is provided in an adsorbent storage container provided in a storage container or a heat insulating structure. That is, in this low temperature liquefied gas storage device, the carbon-based adsorbent is isolated from the space where the low temperature liquefied gas and boil-off gas in the storage container are stored. In addition, when installing the adsorbent storage container in the storage container, the installation position of the adsorbent storage container in the storage container is arbitrary, and is not limited to the ledge part but in the region where the low-temperature liquefied gas is stored. May be installed.

In this low-temperature liquefied gas storage device, the cold heat of the low-temperature liquefied gas and boil-off gas in the storage container is transmitted to the carbon-based adsorbent by the heat transfer device. For this reason, in a state where the low-temperature liquefied gas is stored in the storage container, the carbon-based adsorbent is kept at an extremely low temperature, and the gas adsorption capacity of the carbon-based adsorbent increases.
Here, the heat transfer device can be configured by, for example, a heat exchanger that performs heat exchange between the low-temperature liquefied gas or boil-off gas in the storage container and the carbon-based adsorbent. Moreover, when installing an adsorbent storage container in a storage container, this adsorbent storage container itself can be made into a heat transfer apparatus by comprising an adsorbent storage container with a heat conductor.

  In this low-temperature liquefied gas storage device, when storing the low-temperature liquefied gas in the storage container, the gas distribution control device regulates the gas flow between the storage container and the adsorbent storage container, and the storage container Supply low-temperature liquefied gas to As a result, the carbon-based adsorbent in the adsorbent storage container does not adsorb the gas supplied in the storage container, and the heat transfer device cools the cold in the storage container (cold heat of the low-temperature liquefied gas or boil-off gas). ) Is transmitted and kept at a very low temperature. That is, in this state, the carbon-based adsorbent has a maximum gas adsorbable amount secured.

In this state, when the boil-off gas in the storage container increases and the internal pressure of the storage container rises, by allowing the boil-off gas to flow from the storage container to the adsorbent storage container by the gas flow control device, The surplus boil-off gas is adsorbed by the carbon-based adsorbent, thereby preventing an increase in the internal pressure of the storage container. In this low-temperature liquefied gas storage device, as described above, since the maximum amount of the carbon-based adsorbent that can be adsorbed is secured at the time when the adsorption of the excess boil-off gas is started, the internal pressure suppression capability of the storage container is high.
Here, the gas flow control device controls, for example, a connection pipe that connects the adsorbent storage container and the storage container, an automatic valve that controls the flow of gas through the connection pipe, and an operation of the automatic valve. And a control device that performs the control.

On the other hand, when the low-temperature liquefied gas or boil-off gas is taken out from the storage container, the internal pressure of the storage container decreases. At this time, by allowing the gas to flow between the adsorbent storage container and the storage container by the gas flow control device, when the internal pressure of the storage container decreases, the boil-off gas in the adsorbent storage container enters the storage container. Inflow, the internal pressure drop of the storage container is suppressed.
When the low-temperature liquefied gas or boil-off gas is further taken out from this state and the internal pressure of the storage container and the adsorbent storage container decreases, the gas adsorbing capacity of the carbon-based adsorbent decreases, and the gas is absorbed from the carbon-based adsorbent. Since it discharge | releases, the internal pressure fall of a storage container and an adsorbent storage container is suppressed. That is, in this low-temperature liquefied gas storage device, when taking out the low-temperature liquefied gas or boil-off gas, it is not necessary to supply gas into the storage container in order to maintain the internal pressure, or the supply amount of gas is small.
Further, as the extraction of the low-temperature liquefied gas or boil-off gas proceeds, the gas adsorbed by the carbon-based adsorbent is released, so that the gas supplied into the storage container can be used effectively.

Thus, in this low-temperature liquefied gas storage device, the adsorption and release of gas by the carbon-based adsorbent is performed as the internal pressure of the storage container changes. In this low-temperature liquefied gas storage device, the amount of gas adsorbed and released by the carbon-based adsorbent is large, so that the internal pressure of the storage container can be properly maintained without increasing the size of the entire device.
In this low-temperature liquefied gas storage device, since the carbon-based adsorbent is provided in the storage container having the heat-insulating structure or in the heat-insulating structure, a new heat-insulating structure for keeping the carbon-based adsorbent at a very low temperature is newly provided. Since it is not necessary to provide it, the whole apparatus can be reduced in size.
In particular, when the adsorbent storage container is provided in the storage container, the space in the storage container can be used effectively, and the entire apparatus can be made smaller.

  The present invention also includes a storage container for storing the low-temperature liquefied gas, a heat insulating structure for insulating between the inside of the storage container and its surroundings, a heat insulating container provided outside the storage container, and the heat insulating container. The provided carbon-based adsorbent, a gas flow control device for controlling the flow of gas between the storage container and the heat-insulated container, and the cold energy in the storage container are transmitted to the carbon-based adsorbent. A cryogenic liquefied gas storage device having a heat transfer device is provided.

In this low temperature liquefied gas storage device, a carbon-based adsorbent is provided in a heat insulating container independent of the storage container. That is, in this low temperature liquefied gas storage device, the carbon-based adsorbent is isolated from the space where the low temperature liquefied gas and boil-off gas in the storage container are stored.
In this low-temperature liquefied gas storage device, the cold heat of the low-temperature liquefied gas and boil-off gas in the storage container is transmitted to the carbon-based adsorbent by the heat transfer device. For this reason, in a state where the low-temperature liquefied gas is stored in the storage container, the carbon-based adsorbent is kept at an extremely low temperature, and the gas adsorption capacity of the carbon-based adsorbent increases.
Here, the heat transfer device can be configured by, for example, a heat exchanger that performs heat exchange between the low-temperature liquefied gas or boil-off gas in the storage container and the carbon-based adsorbent.

  In this low temperature liquefied gas storage device, when storing the low temperature liquefied gas in the storage container, the gas flow control device regulates the gas flow between the storage container and the heat insulating container, and the low temperature liquefied gas storage device Supply liquefied gas. As a result, the carbon-based adsorbent in the heat insulation container is not adsorbing the gas supplied in the storage container, and the heat transfer device cools the cold in the storage container (cold heat of the low-temperature liquefied gas and boil-off gas). Is transmitted and kept at very low temperatures. That is, in this state, the carbon-based adsorbent has a maximum gas adsorbable amount secured.

In this state, if the boil-off gas in the storage container increases and the internal pressure of the storage container rises, surplus by allowing the boil-off gas to flow from the storage container to the heat insulating container by the gas flow control device. The boil-off gas is adsorbed by the carbon-based adsorbent, and an increase in the internal pressure of the storage container is prevented. In this low-temperature liquefied gas storage device, as described above, since the maximum amount of the carbon-based adsorbent that can be adsorbed is secured at the time when the adsorption of the excess boil-off gas is started, the internal pressure suppression capability of the storage container is high.
Here, the gas flow control device includes, for example, a connection pipe that connects the inside of the heat insulation container and the storage container, an automatic valve that controls the flow of gas through the connection pipe, and a control that controls the operation of the automatic valve. And a device.

On the other hand, when the low-temperature liquefied gas or boil-off gas is taken out from the storage container, the internal pressure of the storage container decreases. At this time, by allowing the gas flow between the heat insulation container and the storage container by the gas flow control device, when the internal pressure of the storage container decreases, the boil-off gas in the heat insulation container flows into the storage container and stores it. A decrease in the internal pressure of the container is suppressed.
When the low-temperature liquefied gas or boil-off gas is further taken out from this state, and the internal pressure of the storage container and the heat insulating container is lowered, the gas adsorption capacity of the carbon-based adsorbent is lowered, and the gas is released from the carbon-based adsorbent. Therefore, the internal pressure fall of a storage container and a heat insulation container is suppressed. That is, in this low-temperature liquefied gas storage device, when taking out the low-temperature liquefied gas or boil-off gas, it is not necessary to supply gas into the storage container in order to maintain the internal pressure, or the supply amount of gas is small.
Further, as the extraction of the low-temperature liquefied gas or boil-off gas proceeds, the gas adsorbed by the carbon-based adsorbent is released, so that the gas supplied into the storage container can be used effectively.
Thus, in this low-temperature liquefied gas storage device, the adsorption and release of gas by the carbon-based adsorbent is performed as the internal pressure of the storage container changes. In this low-temperature liquefied gas storage device, the amount of gas adsorbed and released by the carbon-based adsorbent is large, so that the internal pressure of the storage container can be properly maintained without increasing the size of the entire device.

  In each of the above low-temperature liquefied gas storage devices, the heat transfer device is configured by a pipe line that takes out the low-temperature liquefied gas or boil-off gas from the storage container and at least partially contacts or is close to the carbon-based adsorbent. May be.

  In the low-temperature liquefied gas storage device configured as described above, the carbon-based adsorbent is cooled by using the cold heat of the low-temperature liquefied gas or boil-off gas taken out from the storage container (that is, the cold heat thrown away after the storage container). Therefore, the cold heat of the low-temperature liquefied gas or boil-off gas can be used effectively.

Each of the low-temperature liquefied gas storage devices may include a heating device that heats the carbon-based adsorbent.
In the low-temperature liquefied gas storage device configured as described above, by heating the carbon-based adsorbent by the heating device, the gas adsorbing ability of the carbon-based adsorbent decreases, and gas is released from the carbon-based adsorbent. That is, in this configuration, the gas adsorption capacity of the carbon-based adsorbent can be freely adjusted without depending on the internal pressure and the ambient temperature of the storage container and the adsorbent storage container, so that the efficient use of boil-off gas, The internal pressure of the storage container or the storage container and the adsorbent storage container can be easily controlled.

In the low-temperature liquefied gas storage device having the configuration in which the heating device is provided as described above, a plurality of the carbon-based adsorbents are provided, and the heating device is configured to individually heat each of the carbon-based adsorbents. Good.
In the low-temperature liquefied gas storage device configured as described above, only a part of the plurality of carbon-based adsorbents can be heated by the heating device.
For this reason, in this low-temperature liquefied gas storage device, gas can be released only from some carbon-based adsorbents, and the amount of gas adsorbed by the carbon adsorbents can be controlled more finely.

These carbon-based adsorbents may contain carbon-based adsorbents having different sizes.
In the low-temperature liquefied gas storage device configured as described above, carbon-based adsorbents having different sizes are used as the carbon-based adsorbent.
A large carbon-based adsorbent exhibits a stable gas adsorption performance because it has a large volume and therefore has a large amount of gas adsorption, and also has a large heat capacity and hardly undergoes a temperature change.
On the other hand, a small carbon-based adsorbent has a small heat capacity and easily changes in temperature, so when heating is started, the temperature rises quickly and gas is released, and when heating is stopped, it quickly cools and has a gas adsorption capacity. Recover quickly.
In other words, in this low-temperature liquefied gas storage device, surplus boil-off gas can be taken in and out quickly by heating or stopping heating of a small carbon-based adsorbent, and the internal pressure of the storage container and the supply amount of boil-off gas can be reduced. It can be controlled quickly.

In each of the above low-temperature liquefied gas storage devices, a cold storage material may be disposed in contact with or close to the carbon-based adsorbent.
In the low-temperature liquefied gas storage device configured as described above, since heat is exchanged between the carbon-based adsorbent and the cold-storage material, a temperature change hardly occurs in the carbon-based adsorbent.
For this reason, once the carbon-based adsorbent is cooled, the temperature of the carbon-based adsorbent is maintained at a low temperature, so that the adsorption capacity of the carbon-based adsorbent is maintained at a high level.

As this cool storage material, it is excellent in the cool storage capacity within the operating temperature range of the carbon-based adsorbent, for example, the temperature range from room temperature to the temperature of the low-temperature liquefied gas so that the carbon-based adsorbent can be cooled effectively It is preferable to use a new material (for example, lead).
Moreover, the arrangement | positioning of a cool storage material is arbitrary, Comprising: For example, it may disperse | distribute in a carbon-type adsorbent or may laminate | stack with a carbon-type adsorbent alternately.

Here, the heat capacity of the cold storage material is appropriately set according to the use of the low-temperature liquefied gas storage device.
For example, when it is desired to stabilize the gas adsorption capacity of the carbon-based adsorbent at a high level, the heat capacity of the regenerator is set large so that the temperature change of the carbon-based adsorbent is suppressed as much as possible. Also, if you want to control the amount of adsorption finely while ensuring a certain level of the cooling effect of the carbon-based adsorbent, set the heat capacity of the regenerator so that the temperature change of the carbon-based adsorbent is relatively easy to occur. .

The present invention is a power generation device that generates power using fuel gas, and uses the low-temperature liquefied gas storage device according to any one of claims 1 to 8 as a device for storing the fuel gas. Providing equipment.
In the power generation device configured as described above, the internal pressure of the storage container can be appropriately maintained without increasing the size of the entire device.

The present invention is a mobile body having a power generation device that generates power using fuel gas, and the low-temperature liquefied gas storage device according to any one of claims 1 to 8 as a device for storing the fuel gas. The mobile body used is provided.
In the mobile body configured as described above, the internal pressure of the storage container can be appropriately maintained without increasing the size of the entire apparatus.

  The present invention is a moving body having a power generation device that generates power using fuel gas, and the low-temperature liquefied gas storage device according to claim 2 or 3, and the adsorbent storage of the low-temperature liquefied gas storage device A boil-off gas supply device that supplies fuel gas in the container or the heat insulation container to the power generation device, and the gas flow control device of the low-temperature liquefied gas storage device is in operation of the moving body, The flow of gas between the storage container and the adsorbent storage container or between the storage container and the heat insulation container is regulated, and when the moving body is stopped, the storage container and the Provided is a moving body configured to allow a gas to flow between an adsorbent storage container or between the storage container and the heat insulating container.

In the moving body configured as described above, during the operation of the moving body, the gas flow control device causes the gas flow between the storage container and the adsorbent storage container (or between the storage container and the heat insulating container). Regulate distribution.
Thereby, when the moving body is operated, the fuel gas is not sufficiently adsorbed by the carbon-based adsorbent, and the fuel gas is sufficiently supplied to the power generation device, so that the performance of the power generation device can be sufficiently exhibited. . At this time, the carbon-based adsorbent is kept at an extremely low temperature by being supplied with the cold heat of the fuel gas by the heat transfer device, so that the maximum amount of gas adsorbable by the carbon-based adsorbent is ensured.
When the moving body is in operation, the boil-off gas supply device may be operated as necessary to supply the fuel gas in the adsorbent storage container or the heat insulating container of the low-temperature liquefied gas storage device to the power generation device. .

When the moving body is stopped, the gas flow control device allows the gas to flow between the storage container and the adsorbent storage container (or between the storage container and the heat insulating container).
Thereby, the boil-off gas generated while the moving body is stopped is effectively absorbed by the carbon-based adsorbent, and the internal pressure of the storage container is maintained within an appropriate range. As described above, the carbon-based adsorbent is sufficiently cooled during operation of the moving body to ensure the maximum amount of gas that can be adsorbed, so that the boil-off gas can be favorably adsorbed.

When the moving body is operated again, the gas flow control device regulates the gas flow between the storage container and the adsorbent storage container (or between the storage container and the heat insulation container). To do.
In this state, the boil-off gas supply device is operated to supply the fuel gas in the adsorbent storage container or the heat insulation container of the low-temperature liquefied gas storage device to the power generation device. Gas can be used effectively.

  According to the low-temperature liquefied gas storage device, the power generation device, and the moving body according to the present invention, the boil-off gas can be effectively used at low cost.

Embodiments according to the present invention will be described below with reference to the drawings.
[First embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2.
In the present embodiment, an example in which the present invention is applied to a low-temperature liquefied gas storage device that stores low-temperature liquefied gas such as LNG (liquefied natural gas), LNG (liquefied natural gas), and LH ₂ (liquid hydrogen) will be described. . Such a low-temperature liquefied gas storage device is used as a gas storage device such as a tanker that transports a low-temperature liquefied gas, a power generation device that generates power using fuel gas, or a fuel tank of a moving body (such as an automobile or a tanker). It is done.

As shown in FIG. 1, a low-temperature liquefied gas storage device 10 according to the present embodiment includes a storage container 11 that stores a low-temperature liquefied gas, a heat insulating structure 12 that insulates between the inside of the storage container 11 and its surroundings, and storage. And a carbon-based adsorbent 13 provided in the ledge portion 11a in the container 11 (a region where the boil-off gas in the upper part of the storage container 11 is stored).
The storage container 11 is provided with a main pipe 16 drawn out from the vicinity of the bottom surface inside the storage container 11 to the outside of the storage container 11 and a gas supply pipe 17 drawn out from the ledge portion 11a to the outside of the storage container 11.

  For example, a power generation device is provided at the subsequent stage of the main pipe 16 and the gas supply pipe 17, and the low-temperature liquefied gas F and the boil-off gas G are supplied from the storage container 11 through these pipes, respectively. Further, the gas supply pipe 17 is provided with a valve 18 for controlling the flow of gas in the gas supply pipe 17, and the boil-off gas G is connected to a device connected to the subsequent stage of the gas supply pipe 17 only when necessary. Can be controlled.

Examples of the heat insulating structure 12 include a vacuum heat insulating structure in which a space between the outer shell and the inner shell (corresponding to the storage container 11 in the present embodiment) is evacuated, a structure in which a heat insulating material is stretched around the storage container 11, and the like. Can be adopted.
As the carbon-based adsorbent 13, for example, activated carbon or CNT can be used.

Similar to general adsorbents, the carbon-based adsorbent 13 has the property that the higher the pressure in the surrounding atmosphere, the greater the amount of gas adsorbed.
Furthermore, as a result of the experiment, the inventors of the present invention have shown that the carbon-based adsorbent 13 has a large change in the amount of gas adsorption with respect to a temperature change and a low temperature as shown in the graph of FIG. It was discovered that it has the property of adsorbing more gas as it becomes. In particular, the carbon-based adsorbent 13 has a gas adsorption amount far exceeding the adsorption amount of the conventional adsorbent in a state lower than a temperature range (near room temperature) generally used as an adsorbent. It was found that it reached about wt%.
In other words, the carbon-based adsorbent 13 has the property of rapidly reducing the amount of gas adsorbed as the temperature rises and quickly releasing the adsorbed gas.

In the low-temperature liquefied gas storage device 10, a carbon-based adsorbent 13 is installed in the ledge portion 11 a of the storage container 11. For this reason, in the state where the low temperature liquefied gas F is stored in the storage container 11, the carbon-based adsorbent 13 is cooled by the cryogenic boil-off gas G and kept at a very low temperature. The material 13 adsorbs a large amount of boil-off gas G.
In this state, when the boil-off gas G in the storage container 11 increases and the internal pressure of the storage container 11 rises, the carbon-based adsorbent 13 adsorbs more boil-off gas G, so that the internal pressure in the storage container 11 increases. Is suppressed.

On the other hand, when the low-temperature liquefied gas F or the boil-off gas G is taken out from the storage container 11, the internal pressure of the storage container 11 decreases. Thus, when the internal pressure of the storage container 11 decreases, the gas adsorption capacity of the carbon-based adsorbent 13 decreases and the boil-off gas G is released into the storage container 11, so that the boil-off gas adsorbed by the carbon-based adsorbent 11 is released. G can be taken out and used effectively.
In addition, since the carbon-based adsorbent 13 releases the boil-off gas G as the internal pressure of the storage container 11 decreases as described above, the internal pressure decrease in the storage container 11 is suppressed, and the storage container is maintained to maintain the internal pressure. There is no need to supply gas into the gas supply 11, or the supply amount of gas is small.

Thus, in the low-temperature liquefied gas storage device 10, the boil-off gas G is adsorbed and released by the carbon-based adsorbent 13 as the internal pressure of the storage container 11 changes. And in this low temperature liquefied gas storage device 10, since the adsorption amount and discharge amount of the boil-off gas G by the carbon-based adsorbent 13 are large, the amount of use of the carbon-based adsorbent 13 can be reduced and the cost is low. The internal pressure of the storage container 11 can be maintained appropriately without increasing the size of the entire apparatus.
Moreover, in this low temperature liquefied gas storage apparatus 10, since the carbon-type adsorption material 13 is provided in the storage container 11 which has the heat insulation structure 12, while being able to utilize the space in the storage container 11 effectively, carbon-type Since it is not necessary to newly provide a heat insulating structure for keeping the adsorbent 13 at an extremely low temperature, the entire apparatus can be reduced in size.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 3, the low-temperature liquefied gas storage device 20 according to this embodiment includes an adsorbent storage container 21 in the storage container 11 in the low-temperature liquefied gas storage device 10 shown in the first embodiment. A carbon-based adsorbent 13 is installed in the adsorbent storage container 21, and a gas flow control device 22 that controls the flow of gas between the storage container 11 and the adsorbent storage container 21 is provided. The main feature is that a heat transfer device for transferring the cold heat to the carbon-based adsorbent 13 is provided. The low-temperature liquefied gas storage device 20 is provided with a heating device 23 for heating the carbon-based adsorbent 13.
Hereinafter, the same or the same members as those of the low-temperature liquefied gas storage device 10 shown in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

The adsorbent storage container 21 forms a space isolated from the space in the storage container 11, and the carbon-based adsorbent 13 stored in the storage container 11 is replaced with the low-temperature liquefied gas F or boil-off gas in the storage container 11. It is isolated from G.
In the present embodiment, the adsorbent storage container 21 is made of a heat conductor such as metal, and the adsorbent storage container 21 itself transmits the cold heat in the storage container 11 to the carbon-based adsorbent 13. Doubles as
Moreover, the adsorbent storage container 21 is provided in the ledge portion 11a, and the carbon-based adsorbent 13 is cooled by the cold heat of the boil-off gas G.
Here, the installation position of the adsorbent storage container 21 in the storage container 11 is arbitrary, and is installed in an area where the low-temperature liquefied gas F is stored. May be cooled.

The gas flow control device 22 includes a connection pipe 26 that connects the inside of the adsorbent storage container 21 and the storage container 11, an automatic valve 27 that controls the flow of gas through the connection pipe 26, and the operation of the automatic valve 27. And a control device 28 for controlling.
Further, the storage container 11 is provided with a gas supply pipe 17a for taking out the boil-off gas G from the ledge portion 11a to the outside of the storage container 11. The gas supply pipe 17a is provided with a pump 29 that takes in and pressurizes the boil-off gas G from the ledge portion 11a, so that the high-pressure boil-off gas G is supplied to the subsequent stage of the gas supply pipe 17a. It has become. In the present embodiment, the gas supply pipe 17a is connected to a part of the gas supply pipe 17 on the rear stage side of the valve 18, so that the rear stage of the boil-off gas G in the storage container 11 is low. The boil-off gas G can be supplied to the device (for example, a power generation device) at a sufficient supply pressure.

  The heating device 23 is, for example, a coil heater, a surrounding atmosphere of the low-temperature liquefied gas storage device 20, a heat exchanger that performs heat exchange between the surrounding device and the atmosphere in the adsorbent storage container 21, or the carbon-based adsorbent 13. Can be configured. In the present embodiment, the operation of the heating device 23 is controlled by the control device 28.

  In the low-temperature liquefied gas storage device 20, when the low-temperature liquefied gas G is stored in the storage container 11, the boil-off gas G is circulated between the storage container 11 and the adsorbent storage container 21 by the gas flow control device 22. The low temperature liquefied gas G is supplied into the storage container 11 in a state where the above is regulated. As a result, the carbon-based adsorbent 13 in the adsorbent storage container 21 does not adsorb the gas supplied into the storage container 11, and cools the storage container 11 through the adsorbent storage container 21 ( The cold heat of the low-temperature liquefied gas F and the boil-off gas G) is transmitted and kept at an extremely low temperature. That is, in this state, the carbon-based adsorbent 13 has a maximum amount of gas that can be adsorbed.

In this state, when the boil-off gas G in the storage container 11 is increased and the internal pressure of the storage container 11 is increased, the boil-off gas G from the storage container 11 to the adsorbent storage container 21 by the gas flow control device 22 is used. Is allowed to flow, the surplus boil-off gas G is adsorbed by the carbon-based adsorbent 13, and the increase in the internal pressure of the storage container 11 is prevented.
In the low-temperature liquefied gas storage device 20, as described above, the maximum amount of gas adsorbable by the carbon-based adsorbent 13 is secured at the time when the adsorption of the surplus boil-off gas G is started. High ability.

On the other hand, when the low-temperature liquefied gas F or the boil-off gas G is taken out from the storage container 11, the internal pressure of the storage container 11 decreases. At this time, if the gas flow control device 22 allows the gas to flow between the adsorbent storage container 21 and the storage container 11 and the internal pressure of the storage container 11 decreases, the boil-off gas in the adsorbent storage container 21 is reduced. G flows into the storage container, and a decrease in the internal pressure of the storage container 11 is suppressed.
When the low-temperature liquefied gas F or the boil-off gas G is further taken out from this state and the internal pressure of the storage container 11 and the adsorbent storage container 21 is reduced, the gas adsorbing capacity of the carbon-based adsorbent 13 is reduced, and the carbon Since the boil-off gas G is released from the adsorbent 13, a decrease in internal pressure of the storage container 11 and the adsorbent storage container 21 is suppressed.

That is, in the low temperature liquefied gas storage device 20, when the low temperature liquefied gas F or the boil-off gas G is taken out, it is not necessary to supply gas into the storage container 11 in order to maintain the internal pressure, or the supply amount of gas is small. Just a little.
Further, as the extraction of the low-temperature liquefied gas F or the boil-off gas G proceeds, the gas adsorbed by the carbon-based adsorbent 13 is released, so that the gas supplied into the storage container 11 can be used effectively.

Further, the low-temperature liquefied gas storage device 20 is provided with a heating device 23 for heating the carbon-based adsorbent 13, and the carbon-based adsorbent 13 is heated by heating the carbon-based adsorbent 13 with the heating device 23. As a result, the gas adsorption capacity of the carbon-based adsorbent 13 is released.
That is, in this low-temperature liquefied gas storage device 20, the gas adsorption capacity of the carbon-based adsorbent 13 can be freely adjusted regardless of the internal pressure and the atmospheric temperature of the storage container 11 and the adsorbent storage container 21. Efficient use of the gas G and control of the internal pressure of the storage container 11 or the storage container 11 and the adsorbent storage container 21 are easy.

[Third embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 4, the low-temperature liquefied gas storage device 30 according to the present embodiment stores the low-temperature liquefied gas F from the vicinity of the bottom surface of the storage vessel 11 in the low-temperature liquefied gas storage device 20 shown in the second embodiment. 11 is mainly characterized in that a part of the main piping 16 taken out from the outside is inserted into the adsorbent storage container 21 and brought into contact with or close to the carbon-based adsorbent 13.
In addition, in the site | part by which the main piping 16 is penetrated in the wall surface of the adsorption material storage container 21, the wall surface and the outer peripheral surface of the main piping 16 are contact | adhered, and the airtightness of the adsorption material storage container 21 is maintained by this. .
Hereinafter, the same or the same members as those of the low-temperature liquefied gas storage device 20 shown in the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the low-temperature liquefied gas storage device 30, the main pipe 16 functions as a heat transfer device that transmits the cold heat of the low-temperature liquefied gas F taken out from the storage container 11 to the carbon-based adsorbent 13. In the present embodiment, the portion of the main pipe 16 that is inserted into the adsorbent storage container 21 is meandered, whereby a sufficient contact area with the atmosphere in the adsorbent storage container 21 is ensured. Communication can be performed sufficiently.

In the low-temperature liquefied gas storage device 30 configured as described above, a carbon-based adsorbent using the cold heat of the low-temperature liquefied gas G taken out from the storage container 11 through the main pipe 16 (that is, the cold heat discarded at the subsequent stage of the storage container 11). 13 is performed, the cold heat of the low-temperature liquefied gas G can be used effectively.
In the present embodiment, instead of meandering the portion inserted into the adsorbent storage container 21 in the main pipe 16, a heat exchanger that performs heat exchange between the inside and outside of the main pipe 16 is provided at this portion. May be.

[Fourth embodiment]
Next, a fourth embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 5, the low-temperature liquefied gas storage device 40 according to this embodiment is configured to insulate the adsorbent storage container 21 in the low-temperature liquefied gas storage device 30 shown in the third embodiment, not in the storage container 11. The main feature is that it is provided in the structure 12.
Also in such a low temperature liquefied gas storage device 40, the same effect as the low temperature liquefied gas storage device 30 shown in the third embodiment can be obtained.
Here, the characteristic configuration of the present embodiment is not limited to the low-temperature liquefied gas storage device 30 shown in the third embodiment, and may be applied to the low-temperature liquefied gas storage device 20 shown in the second embodiment. .

[Fifth embodiment]
Next, a fifth embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 6, the low-temperature liquefied gas storage device 50 according to this embodiment is provided outside the storage container 11 in place of the adsorbent storage container 21 in the low-temperature liquefied gas storage device 30 shown in the third embodiment. The main characteristic is that the heat insulating container 51 is used.
That is, the low-temperature liquefied gas storage device 50 is provided outside the storage container 11 and the carbon-based adsorbent 13 is installed in a heat-insulating container 51 whose inside is insulated from the surrounding atmosphere. 26 is configured to connect the inside of the heat insulating container 51 and the inside of the storage container 11, and the main pipe 16 also serving as a heat transfer device is inserted into the heat insulating container 51.

Further, the heat insulating container 51 is provided with a gas supply pipe 57 that connects the inside of the heat insulating container 51 and a portion of the gas supply pipe 17 that is behind the valve 18, and the gas supply pipe 57 includes a gas supply pipe 57. A valve 58 that controls the flow of gas through 57 is provided.
The operation of the valve 58 is controlled by the control device 28 of the gas flow control device 22.

  Also in the low-temperature liquefied gas storage device 50, the cold heat of the low-temperature liquefied gas F in the storage container 11 is transmitted to the carbon-based adsorbent 13 by the heat transfer device formed by the main pipe 16. For this reason, in the state where the low-temperature liquefied gas F is stored in the storage container 11, the carbon-based adsorbent 13 is kept at a very low temperature, and the gas adsorption capacity of the carbon-based adsorbent 13 increases.

  In the low-temperature liquefied gas storage device 50, when the low-temperature liquefied gas F is stored in the storage container 11, the gas flow control device 22 regulates the gas flow between the storage container 11 and the heat insulating container 51. Then, the low temperature liquefied gas F is supplied to the storage container 11. As a result, the carbon-based adsorbent 13 in the heat insulating container 51 remains in a state in which the gas supplied into the storage container 11 is not adsorbed, and is stored in the storage container 11 via the main pipe 16 constituting the heat transfer device. Cold heat (cold heat of the low-temperature liquefied gas F) is transmitted and kept at an extremely low temperature. That is, in this state, the carbon-based adsorbent 13 has a maximum amount of gas that can be adsorbed.

  In this state, when the boil-off gas G in the storage container 11 is increased and the internal pressure of the storage container 11 is increased, the boil-off gas G is circulated from the storage container 11 into the heat insulating container 51 by the gas flow control device 22. Is allowed, the surplus boil-off gas G is adsorbed by the carbon-based adsorbent 13, and the increase in the internal pressure of the storage container 11 is prevented. In this low-temperature liquefied gas storage device 50, as described above, the maximum amount of gas adsorbable of the carbon-based adsorbent 13 is secured at the time when the adsorption of the surplus boil-off gas G is started. High ability.

On the other hand, when the low-temperature liquefied gas F or the boil-off gas G is taken out from the storage container 11, the internal pressure of the storage container 11 decreases. At this time, by allowing the gas flow between the heat insulating container 51 and the storage container 11 by the gas flow control device 22, when the internal pressure of the storage container 11 is lowered, the boil-off gas G in the heat insulating container 51 is changed to the storage container. It flows in, and the fall of the internal pressure of the storage container 11 is suppressed.
When the low-temperature liquefied gas F or the boil-off gas G is further taken out from this state and the internal pressure of the storage container 11 and the heat insulating container 51 is lowered, the gas adsorbing capacity of the carbon-based adsorbent 13 is lowered, and the carbon-based adsorbent Since gas is released from 13, the internal pressure reduction of the storage container 11 and the heat insulation container 51 is suppressed.
Further, as the extraction of the low-temperature liquefied gas F or the boil-off gas G proceeds, the gas adsorbed by the carbon-based adsorbent 13 is released, so that the gas supplied into the storage container 11 can be used effectively.

  Further, in this low-temperature liquefied gas storage device 50, the automatic valve 27 is closed to restrict the gas flow between the heat insulating container 51 and the storage container 11, and the carbon-based adsorption is performed with the valve 58 opened. By releasing the boil-off gas G from the material 13, the boil-off gas G can be directly supplied from the carbon-based adsorbent 13 to the power generation device.

[Sixth embodiment]
Next, a sixth embodiment of the present invention will be described with reference to FIG.
The low-temperature liquefied gas storage device 60 according to this embodiment is the low-temperature liquefied gas storage device shown in each of the above-described embodiments, wherein the carbon-based adsorbent 13 is composed of a plurality of carbon-based adsorbents, and the heating device is made of these carbon. The main feature is that the system adsorbent is individually heatable.
In the present embodiment, the carbon-based adsorbents are configured by carbon-based adsorbents 13a, 13b, 13c,... Having different sizes, and the heaters 61a, 61b, 61c,... Are provided. The operations of these heaters are individually controlled by the control device 28.

In the low-temperature liquefied gas storage device 60 configured as described above, only a part of the plurality of carbon-based adsorbents 13 can be heated by the heating device.
For this reason, in this low-temperature liquefied gas storage device 60, gas can be released only from some carbon-based adsorbents 13, and the amount of gas adsorbed by the carbon adsorbents 13 can be controlled more finely.

For example, the large carbon-based adsorbent 13 has a large volume and therefore has a large amount of gas adsorption, and has a large heat capacity and is unlikely to change in temperature, so that it exhibits stable gas adsorption performance.
On the other hand, since the small carbon-based adsorbent 13 has a small heat capacity and easily changes in temperature, the temperature quickly rises when heating is started and gas is released, and when the heating is stopped, the carbon adsorbent 13 is quickly cooled and gas adsorption capacity. Recovers quickly.
That is, in this low-temperature liquefied gas storage device 60, by heating or stopping heating of the small carbon-based adsorbent 13, the surplus boil-off gas G can be quickly put in and out, and the internal pressure of the storage container 11 or boil-off gas can be obtained. The supply amount of G can be quickly controlled.

[Seventh embodiment]
Next, a seventh embodiment of the present invention will be described with reference to FIG.
The low-temperature liquefied gas storage device 70 according to the present embodiment is mainly characterized in that, in the low-temperature liquefied gas storage device shown in each of the above-described embodiments, the cold storage material 71 is arranged in contact with or close to the carbon-based adsorbent 13. Is.
In the present embodiment, as shown in FIG. 8, a large number of granular regenerators 71 are arranged in the carbon-based adsorbent 13.

In the low-temperature liquefied gas storage device 70 configured as described above, since heat is exchanged between the carbon-based adsorbent 13 and the cold-storage material 71, the carbon-based adsorbent 13 hardly changes in temperature.
For this reason, once the carbon-based adsorbent 13 is cooled, the temperature of the carbon-based adsorbent 13 is maintained at a low temperature, so that the adsorption capacity of the carbon-based adsorbent 13 is maintained at a high level.

  As this cool storage material 71, in order to be able to cool the carbon-based adsorbent 13 effectively, the operating temperature range of the carbon-based adsorbent 13, for example, within the temperature range from room temperature to the temperature of the low-temperature liquefied gas F is used. It is preferable to use a material (for example, lead) having an excellent cold storage capacity.

Here, the heat capacity of the cold storage material 71 is appropriately set according to the application of the low-temperature liquefied gas storage device 70.
For example, when it is desired to stabilize the gas adsorption capacity of the carbon-based adsorbent 13 at a high level, the heat capacity of the regenerator 71 is set large so that the temperature change of the carbon-based adsorbent 13 is suppressed as much as possible. In addition, when it is desired to finely control the amount of adsorption while ensuring a certain level of the cooling effect of the carbon-based adsorbent 13, the heat capacity of the regenerator is reduced so that the temperature change of the carbon-based adsorbent 13 is relatively likely to occur. Set.

Further, the arrangement of the regenerator material 71 is arbitrary. For example, a layer of the regenerator material 71 may be provided between the layers of the carbon-based adsorbent 13 of a plurality of layers as in the low-temperature liquefied gas storage device 73 shown in FIG. .
Moreover, you may arrange | position the block of the cool storage material 71 in contact with the block of the carbonaceous adsorption material 13, like the low temperature liquefied gas storage apparatus 75 shown in FIG.

[Eighth embodiment]
Next, an eighth embodiment of the present invention will be described with reference to FIG.
In the present embodiment, an example in which the present invention is applied to a tanker using the low-temperature liquefied gas storage device of the present invention as a fuel gas storage device is shown.
The tanker 80 shown in the present embodiment is a low-temperature liquefied gas storage device, and includes a storage container 11, a heat insulating structure 12, a heat insulating container 51 provided outside the storage container 11, and a carbon-based adsorption provided in the heat insulating container 51. A low-temperature liquefied gas storage device 81 having a material 13 and a heating device 23 for heating the carbon-based adsorbent 13 is used.

The storage container 11 is provided with a main pipe 86 drawn from the vicinity of the bottom of the storage container 11 to the outside of the storage container 11, and a gas supply pipe 87 drawn from the ledge portion 11 a of the storage container 11 to the outside of the storage container 11. .
A spray pump 86 a is provided at the inlet of the main pipe 86 so that the low-temperature liquefied gas F in the storage container 11 is sent into the main pipe 86.
The boil-off gas G generated in the storage container 11 is supplied to the gas supply pipe 87 by the internal pressure of the storage container 11.

A chamber 86 b into which the gas supply pipe 87 is inserted is provided at a portion of the main pipe 86 located outside the storage container 11. In the chamber 86b, there is provided a spray nozzle 86c that blows the low-temperature liquefied gas F supplied into the main pipe 86 toward the gas supply pipe 87, whereby the low-temperature liquefied gas F is expanded, and more While becoming a low-temperature gas, the cold heat of this low-temperature gas is used for cooling the boil-off gas G flowing through the gas supply pipe 87.
A compressor 88 that compresses the gas that has passed through the chamber 86b and sends it as a high-pressure gas to the subsequent stage is provided at the end of the main pipe 86, and the compressor 88 and on-shore storage facilities are provided at the subsequent stage of the compressor 88. A connection pipe line 89 is provided to connect the two.

  The part of the gas supply pipe 87 located outside the storage container 11 is inserted into the chamber 86b, and the subsequent part is inserted into the heat insulating container 51. Therefore, the boil-off supplied to the gas supply pipe 87 is eliminated. The gas cools the carbon-based adsorbent 13 while efficiently exchanging heat with the carbon-based adsorbent 13, and then jets into the heat insulating container 51. The ejected boil-off gas is adsorbed by the carbon-based adsorbent 13 that has been cooled and improved in adsorption efficiency.

  The connection pipe 26 is provided with an automatic valve 27 whose operation is controlled by a control device 28 (not shown). That is, the gas flow control device 22 is provided in the gas supply pipe 87.

  In the present embodiment, the heating device 23 supplies the seawater around the tanker 80 into the pipe 90 that is partially inserted into the heat insulating container 51 and is brought close to or in contact with the carbon-based adsorbent 13. And a pump 91. That is, the heating device 23 is configured to heat the carbon-based adsorbent 13 using the heat of the seawater around the tanker 80, thereby reducing the running cost.

In the tanker 80 configured as described above, the low temperature liquefied gas storage device 81 adsorbs the excess boil-off gas G to the carbon-based adsorbent 13 in the same manner as each of the low temperature liquefied gas storage devices described above, and Keep the internal pressure within the proper range.
Then, after the tanker 80 arrives at the destination and unloads the low-temperature liquefied gas F to the on-shore storage facility, the carbon adsorbent 13 is heated by the heating device 23 in the same manner as each of the liquefied gas storage devices. Then, the boil-off gas G adsorbed by the carbon-based adsorbent 13 is released, and this boil-off gas G is also sent to the storage facility on land or returned to the storage container 11 to receive the supply of gas from the outside. Without, the internal pressure in the storage container 11 is ensured.

[Ninth embodiment]
Next, a ninth embodiment of the present invention will be described with reference to FIG.
The tanker 100 shown in this embodiment is mainly characterized in that the low-temperature liquefied gas storage device 101 is used in place of the low-temperature liquefied gas storage device 81 in the tanker shown in the eighth embodiment of the present invention. Further, the tanker 100 uses a power generator 102 having a configuration that can use fuel gas, such as a gas turbine engine or a steam turbine.

The low-temperature liquefied gas storage device 101 is characterized in that, in the low-temperature liquefied gas storage device 81, the chamber 86b and the spray nozzle 86c of the main pipe 86 are eliminated, and instead, a part of the main pipe 86 is inserted into the heat insulating container 51. It is what.
The low-temperature liquefied gas storage device 101 has a gas supply pipe 57 that connects the inside of the heat insulating container 51 and the rear stage of the compressor 88, whereby the boil-off gas G in the heat insulating container 51 is sent to the rear stage of the compressor 88. It is supposed to be.

In the present embodiment, the gas supply pipe 57 is connected to the rear stage of the gas supply pipe 57 only when the back flow of the gas from the rear stage of the compressor 88 to the heat insulating container 51 is prevented and the internal pressure in the heat insulating container 51 exceeds the discharge pressure of the compressor 88. A check valve 57a that allows gas to pass through is provided so that when a predetermined amount or more of boil-off gas G is generated, it is automatically sent to the subsequent stage of the compressor 88.
In the present embodiment, the power generation device 102 of the tanker 100 is connected to the subsequent stage of the compressor 88. That is, the gas supply pipe 57 constitutes a boil-off gas supply device that supplies the boil-off gas G in the heat insulating container 51 to the power generation device 102.
Thereby, in this tanker 100, the surplus boil-off gas G is used without waste as fuel for the power generation device 101.

When the tanker 100 moves, the gas flow control device 22 regulates the gas flow between the storage container 11 and the heat insulating container 51.
Thereby, when the tanker 100 is moved, the boil-off gas G is not sufficiently adsorbed by the carbon-based adsorbent 13, and the boil-off gas G is sufficiently supplied to the power generation device 102, so that the performance of the power generation device 102 is sufficiently improved. It can be demonstrated.
At this time, since the carbon-based adsorbent 13 is continuously supplied with the cold heat of the boil-off gas G and is kept at an extremely low temperature, the carbon-based adsorbent 13 can secure the maximum amount of gas adsorbable. .
If necessary, the heating device 23 and the boil-off gas supply device may be operated to supply the boil-off gas G in the heat insulating container 51 to the power generation device 102.

Further, when the tanker 100 is stopped, the gas flow control device 22 allows gas flow between the storage container 11 and the heat insulating container 51.
Thereby, the boil-off gas G generated while the tanker 100 is stopped is effectively absorbed by the carbon-based adsorbent 13, and the internal pressure of the storage container 11 is maintained within an appropriate range. As described above, since the carbon-based adsorbent 13 is sufficiently cooled when the tanker 100 is moved to ensure the maximum amount of gas that can be adsorbed, the boil-off gas G can be favorably adsorbed.

When the tanker 100 is moved again, the gas flow control device 22 regulates the gas flow between the storage container 11 and the heat insulation container 51.
In this state, the boil-off gas supply device is operated, and the boil-off gas G in the heat insulating container 51 of the low-temperature liquefied gas storage device 101 is supplied to the power generation device 102, whereby the boil-off gas G generated while the tanker 100 is stopped. Can be used effectively.

[Tenth embodiment]
Next, a tenth embodiment of the present invention will be described with reference to FIG.
In this embodiment, the example which applied this invention to the motor vehicle 110 is shown.
The automobile 110 includes a power generation device 112 that generates power using fuel gas, such as a gas engine or a fuel cell.
The automobile 110 has the low-temperature liquefied gas storage device 50 shown in the fifth embodiment, and the low-temperature liquefied gas storage device 50 stores the fuel gas used in the power generation device 112 as a low-temperature liquefied gas. It is configured. In the present embodiment, the gas supply pipe 57 of the low-temperature liquefied gas storage device 50 constitutes a boil-off gas supply device that supplies the boil-off gas G in the heat insulating container 51 to the power generation device 112.

During the movement of the automobile 110, the gas flow control device 22 regulates the gas flow between the storage container 11 and the heat insulating container 51.
Thereby, when the automobile 110 moves, the boil-off gas G is not sufficiently adsorbed by the carbon-based adsorbent 13 and the boil-off gas G is sufficiently supplied to the power generation device 112, so that the performance of the power generation device 112 is sufficiently improved. It can be demonstrated.
At this time, since the carbon-based adsorbent 13 is continuously supplied with the cold heat of the boil-off gas G and is kept at an extremely low temperature, the carbon-based adsorbent 13 can secure the maximum amount of gas adsorbable. .
Note that the boil-off gas G in the heat insulating container 51 may be supplied to the power generation device 112 by operating the heating device 23 and the boil-off gas supply device as necessary.

Further, when the automobile 110 is stopped, the gas flow control device 22 allows the gas to flow between the storage container 11, the storage container 11, and the heat insulation container 51.
Thereby, the boil-off gas G generated while the automobile 110 is stopped is effectively absorbed by the carbon-based adsorbent 13, and the internal pressure of the storage container 11 is maintained within an appropriate range. As described above, since the carbon-based adsorbent 13 is sufficiently cooled when the automobile 110 is moved to ensure the maximum amount of gas that can be adsorbed, the boil-off gas G can be favorably adsorbed.

When the automobile 110 is moved again, the gas flow control device 22 regulates the gas flow between the storage container 11 and the heat insulation container 51.
In this state, the boil-off gas supply device is operated to supply the boil-off gas G in the heat insulating container 51 of the low-temperature liquefied gas storage device 50 to the power generation device 112, so that the boil-off gas G generated while the automobile 110 is stopped. Can be used effectively.

It is a sectional side view showing the low-temperature liquefied gas storage device concerning a first embodiment of the present invention. It is a graph which shows the temperature characteristic of the gas adsorption amount of the carbonaceous adsorbent discovered by the present inventors. It is a sectional side view which shows the low temperature liquefied gas storage apparatus which concerns on 2nd embodiment of this invention. It is a sectional side view which shows the low temperature liquefied gas storage apparatus which concerns on 3rd embodiment of this invention. It is a sectional side view which shows the low temperature liquefied gas storage apparatus which concerns on 4th embodiment of this invention. It is a sectional side view which shows the low temperature liquefied gas storage apparatus which concerns on 5th embodiment of this invention. It is a sectional side view which shows the low temperature liquefied gas storage apparatus which concerns on 6th embodiment of this invention. It is a sectional side view which shows the low temperature liquefied gas storage apparatus which concerns on 7th embodiment of this invention. It is a sectional side view which shows the other example of a low temperature liquefied gas storage apparatus which concerns on 7th embodiment of this invention. It is a sectional side view which shows the other example of a low temperature liquefied gas storage apparatus which concerns on 7th embodiment of this invention. It is a figure which shows the structure of the low temperature liquefied gas conveyance tanker which concerns on 8th embodiment of this invention. It is a figure which shows the structure of the low-temperature liquefied gas conveyance tanker which concerns on 9th embodiment of this invention. It is a figure which shows the structure of the motor vehicle which concerns on 10th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Low temperature liquefied gas storage apparatus 11 Storage container 11a Arledge part 12 Heat insulation structure 13 Carbon type adsorbent 16 Main piping (pipe)
20 Low temperature liquefied gas storage device 21 Adsorbent container (heat transfer device)
22 Gas distribution control device 23 Heating device 30 Low temperature liquefied gas storage device 31 Heat transfer device 40 Low temperature liquefied gas storage device 50 Low temperature liquefied gas storage device 51 Heat insulation container 57 Gas supply pipe (boil-off gas supply device)
60 Low temperature liquefied gas storage device 70 Low temperature liquefied gas storage device 71 Cold storage material 80 Tanker (moving body)
81 Low temperature liquefied gas storage device 100 Tanker (moving body)
101 Low Temperature Liquefied Gas Storage Device 102 Power Generation Device 110 Automobile 112 Power Generation Device

Claims (11)

A storage container for storing the cryogenic liquefied gas;
A heat insulating structure for insulating between the inside of the storage container and its surroundings;
A low-temperature liquefied gas storage device comprising a carbon-based adsorbent provided in an ledge portion in the storage container. A storage container for storing the cryogenic liquefied gas;
A heat insulating structure for insulating between the inside of the storage container and its surroundings;
An adsorbent storage container provided in the storage container or in the heat insulating structure and forming a space isolated from the space in the storage container inside;
A carbon-based adsorbent provided in the adsorbent storage container;
A gas flow control device for controlling the flow of gas between the storage container and the adsorbent storage container;
A low-temperature liquefied gas storage device comprising: a heat transfer device that transfers cold heat in the storage container to the carbon-based adsorbent. A storage container for storing the cryogenic liquefied gas;
A heat insulating structure for insulating between the inside of the storage container and its surroundings;
A heat insulating container provided outside the storage container;
A carbon-based adsorbent provided in the heat insulating container;
A gas flow control device for controlling the flow of gas between the storage container and the heat insulation container;
A low-temperature liquefied gas storage device comprising: a heat transfer device that transfers cold heat in the storage container to the carbon-based adsorbent.   4. The heat transfer device according to claim 1, wherein the low-temperature liquefied gas or boil-off gas is extracted from the storage container, and at least a part of the heat transfer device is configured by a pipe line in contact with or close to the carbon-based adsorbent. The low-temperature liquefied gas storage device described.   The low-temperature liquefied gas storage device according to any one of claims 1 to 4, further comprising a heating device that heats the carbon-based adsorbent. A plurality of the carbon-based adsorbents are provided,
The low-temperature liquefied gas storage device according to claim 5, wherein the heating device is configured to individually heat the carbon-based adsorbents.   The low-temperature liquefied gas storage device according to claim 7, wherein each of the carbon-based adsorbents includes carbon-based adsorbents having different sizes.   The low-temperature liquefied gas storage device according to any one of claims 1 to 7, wherein a cold storage material is disposed in contact with or in proximity to the carbon-based adsorbent. A power generation device that generates power using fuel gas,
A power generation device using the low-temperature liquefied gas storage device according to any one of claims 1 to 8, as the device for storing the fuel gas. A moving body having a power generation device that generates power using fuel gas,
The moving body using the low-temperature liquefied gas storage apparatus in any one of Claim 1 to 8 as an apparatus which stores the said fuel gas. A moving body having a power generation device that generates power using fuel gas,
The low-temperature liquefied gas storage device according to claim 2 or 3,
A boil-off gas supply device that supplies fuel gas in the adsorbent storage container or the heat insulation container of the low-temperature liquefied gas storage device to the power generation device,
The gas flow control device of the low-temperature liquefied gas storage device is operated between the storage container and the adsorbent storage container or between the storage container and the heat insulation container when the moving body is in operation. The gas distribution of
A moving body configured to allow a gas to flow between the storage container and the adsorbent storage container or between the storage container and the heat insulating container when the moving body is stopped.

Images