JP2001004271A - System for producing liquefied gas - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve an efficient utilization of an equipment regardless of variation in a local demand of gas. SOLUTION: An ASU plant 6 for producing liquefied nitrogen or liquefied oxygen is provided on a barge 2 able to move on the water, and the barge 2 is connected to a self-propelled ship 3 by a chain 4. Thus, the barge 2 equipped with the ASU plant 6 can be transported to any place, and by adding another barge or by replacing the barge, variation in the local demand for gas can be rapidly met. As a result, a liquefied gas producing equipment including an ASU plat 6 can be efficiently utilized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to liquefied hydrogen,
The present invention relates to a liquefied gas production system for nitrogen, oxygen, and the like, and more particularly to a liquefied gas production system that can be moved to an arbitrary location by moving over water.

[0002]

2. Description of the Related Art As a liquefied gas production system for obtaining oxygen or nitrogen, for example, an air separation unit (ASU) using a rectification column is known. In such an air separation unit, liquefied oxygen, liquefied nitrogen, liquefied argon, and the like can be obtained by cryogenically rectifying and separating the raw material air introduced into a rectification tower having a large number of trays.

Further, for example, as a liquefied gas production system for obtaining liquefied hydrogen or liquefied carbon dioxide gas, a raw material is subjected to a reforming reaction to separate a target gas, and the gas is liquefied by a method such as adiabatic expansion. Is known. When attempting to obtain liquefied hydrogen by this system, liquefied natural gas (LN) is obtained by a reforming reaction using a catalyst.
G) is separated and purified from hydrogen and liquefied by a known means such as adiabatic expansion.

[0004]

The liquefied gas production system as described above is often a large facility in terms of operating efficiency, and the assembly cost is not inexpensive. However, since the above-mentioned system is a facility fixed to a specific land, when the local demand for gas increases, there is a problem that it is not possible to quickly and sufficiently respond to the increase in gas supply. Further, when the regional demand for gas decreases, there is a problem that the capacity utilization rate decreases and the production capacity becomes excessive.

[0005] Therefore, a main object of the present invention is to provide a liquefied gas production system capable of efficiently using equipment regardless of fluctuations in local demand for gas.

[0006]

In order to achieve the above object, a liquefied gas production system according to claim 1 is characterized in that liquefied gas production means is provided on a floating body movable on water. is there.

According to the first aspect of the present invention, since the liquefied gas producing means is provided on the floating body, the liquefied gas producing means is moved to an arbitrary place near the water by moving the floating body on a water surface such as a sea or a lake. It can be relocated. Therefore, when the local demand increases, it is possible to quickly respond to the increase in demand by replacing the liquefied gas production system with a larger one or adding another liquefied gas production system. Further, when the regional demand decreases, it is possible to cope with the demand decrease by replacing the liquefied gas production system with a smaller one or by removing the existing liquefied gas production system itself. Therefore, it is also suitable as a gas supply facility for an area where gas supply is required only for a specific period. It should be noted that the first aspect has a case where the floating body itself has a power source and can travel on its own, and the second case does not have a power source and the floating body itself can run on its own. This includes both cases where goods are transported to ships and the like.

[0008] In this way, by relocating the liquefied gas production system having the gas production capacity according to the local demand, the operation rate of the equipment is improved, and the equipment can be used efficiently. Furthermore, by relocating the liquefied gas production system of the present invention as close as possible to the gas demand area, the transportation cost of the produced gas can be significantly reduced as compared with the liquefied gas production system fixed on land. Can be. Further, according to the present invention, since liquefied gas can be produced, it is possible to reduce costs required for storage and transportation as compared with the case where non-liquefied gas is produced. The liquefied gas production system of the present invention can be relocated not only in Japan but also overseas as long as it is connected by a waterway, and for countries such as Japan, an island country surrounded by the sea. , Especially useful.

According to the liquefied gas production system of the first aspect, it is not necessary to assemble the system in the gas supply area, and the gas can be supplied only by transferring the previously assembled liquefied gas production system. It is possible to supply gas in a relatively short period of time after receiving an order and at low cost.

Further, according to the liquefied gas production system of the first aspect, since the liquefied gas production means is provided on the floating body, gas can be produced on the water, and a land area large enough for the gas production. It is possible to produce gas even if it cannot be prepared on land. Further, since gas can be produced even on water, efficient gas production can be performed by effectively utilizing the time during moving the liquefied gas production system.

The floating body referred to in the present specification may be any structure as long as it can be given a buoyancy by some means and can maintain a stable floating state on water. It may have the same structure as a ship or the like. Further, the buoyancy can be adjusted by taking in and out of water.

Further, the liquefied gas production system according to claim 2 is characterized in that the floating body has no power source for self-propelled traveling, and the floating body is connected to a ship capable of self-propelled traveling. Things.

According to the second aspect, since the floating body provided with the liquefied gas producing means and the ship can be separated at the transport destination, it is possible to transfer only the floating body to a land facility such as a dock. Therefore, stable gas production can be performed at the relocation destination without being affected by shaking due to waves. Further, as compared with the case where the liquefied gas producing means is provided inside the ship as in claim 4, the cost advantage is large in that the existing ship can be used as it is.

Further, since the floating body does not have a power source such as an engine for self-propelled traveling, the floating body itself can be made relatively small. Therefore, when a floating body is relocated to a land facility such as a dock at a transport destination, the floating body can be installed in a relatively small facility. The connection between the floating body and the ship may be performed by locking a chain to both, or any other known means may be used.

The liquefied gas production system according to claim 3 is characterized in that the liquefied gas production means includes cryogenic air separation means using a rectification column.

According to the liquefied gas production system of the third aspect, air-containing components such as nitrogen, oxygen and argon can be supplied by the cryogenic air separation means using the rectification column. At this time, it is generally difficult to perform gas production during the movement of the floating body because the rectification tower is likely to not operate normally if there is shaking. Therefore, for example, when the floating body is connected to a ship and transported, it is preferable that the floating body be separated from the ship and that only the floating body be fixed to a land facility such as a dock to perform gas production.

In the liquefied gas producing system according to the third aspect, the liquefied gas producing means is, in addition to the cryogenic air separation means using a rectification column, a raw material reforming means as defined in claim 5 and the reforming means. Means for liquefying the gas obtained by the quality means. This makes it possible to produce not only air-containing components such as nitrogen, oxygen, and argon but also, for example, hydrogen in a single floating body.

A liquefied gas producing system according to a fourth aspect of the present invention is characterized in that liquefied gas producing means is provided in a ship capable of running on its own.

According to the fourth aspect, since the liquefied gas producing means is provided on the ship capable of running on its own, substantially the same advantages as in the first aspect can be obtained. That is, according to claim 4, since the liquefied gas producing means is provided on a ship capable of traveling on its own, the liquefied gas producing means is moved to the waterside by moving the ship on the water surface such as a sea or a lake. Can be relocated to a location. Therefore, it is possible to quickly respond to a change in the local demand for gas, to improve the operation rate of the equipment, and to efficiently use the equipment.

Further, the gas transportation cost can be greatly reduced. In addition, since gas can be supplied only by transferring the liquefied gas production system that has been assembled in advance, gas can be supplied in a relatively short period of time and at low cost from receiving an order. Further, since the liquefied gas producing means is provided on the ship, it is possible to relocate to a place where a land of a sufficient area cannot be prepared and produce gas. Further, since gas can be produced even on water, efficient gas production can be performed by effectively utilizing the time during moving the liquefied gas production system.

In particular, according to the liquefied gas production system of the fourth aspect, since the liquefied gas production means is provided in the ship, the floating body provided separately as in the second aspect is connected to the ship. In comparison with the case where the floating body is provided, there is an advantage that the floating body does not hinder the operation of the ship, and the ship can be stably moved at a large speed.

A liquefied gas production system according to a fifth aspect is characterized in that the liquefied gas production means includes a raw material reforming means and a gas liquefaction means obtained by the reforming means. It is.

According to the fifth aspect, the liquefied gas producing means including the reforming means and the liquefying means can supply components such as hydrogen and carbon dioxide contained in the raw material at the transfer destination. At this time, since the reforming means and the liquefying means according to claim 5 can not include the rectification tower as in claim 3, suitable gas production can be performed even when there is shaking during voyage or the like. is there.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic plan view showing a schematic configuration of a liquefied gas production system according to a first embodiment of the present invention. A liquefied gas production system 1 shown in FIG. 1 includes a barge (barge) 2 which is a floating body movable on water, a ship 3, and a barge 2
It consists of two chains 4 connecting between the ship and the ship 3, and floats on the sea 5.

In the present embodiment, the barge 2, which is a structure that can move while floating on water, has no power source for traveling and cannot travel on its own. However, since the barge 2 is connected to the ship 3 which can travel on its own via the chain 4, it is possible to transport the barge 2 to an arbitrary location near the water, such as a dock 10 (see FIG. 2) described later. is there. It should be noted that the barge 2 itself may be provided with a power source for self-traveling, in which case the barge 2 can be moved to an arbitrary location without using the boat 3.

The barge 2 has an ASU plant 6 and an LN
A G tank 7 and a private power generation facility 8 are provided. L
The NG tank 7 stores liquefied natural gas used as an energy source in the barge 2 in addition to the private power generation facility 8. The private power generation facility 8 receives the supply of liquefied natural gas from the LNG tank 7 and generates electric power used in the ASU plant 6 and the like.

The ASU plant 6 is a rectification column (not shown)
And a cryogenic air separation device using the same. The ASU plant 6 includes a rectification tower, a heat exchanger, a compressor, an expansion turbine, etc., as well as purified liquefied oxygen (LO ₂ ) and liquefied nitrogen (L
N ₂ ), and a buffer tank (all not shown) for performing gas-liquid separation such as liquefied argon (LAr).
Since a cryogenic air separation device using a rectification column is well known, a detailed description thereof is omitted here.

FIG. 2 is a plan view schematically showing a state in which the barge 2 is fixed in the dock in the present embodiment.
In FIG. 2, a dock 10 in which shipbuilding or ship repair is performed faces the sea 5, and is configured to guide water to the inside or drain water from the inside as necessary. I have. In the vicinity of the dock 10, a plurality of liquefied gas tanks 12 for storing liquefied gas and an LNG tank (not shown) for supplying LNG to the barge 2 are arranged.

In this embodiment, the ASU plant 6
Is transported by the ship 3 to the desired dock 10. Then, after the barge 2 is guided into the dock 10 containing water, the water of the dock 10 is extracted, and if necessary, a means for stably installing the barge 2 is taken. The dock 10 is fixed stably.

The barge 2 fixed to the dock 10
Is connected to a liquefied gas tank 12 corresponding to the type of gas by a pipeline (not shown). By operating the ASU plant 6 in the barge 2 in such a state, the liquefied gas tank 12 can store liquefied nitrogen, liquefied oxygen, and the like. Also,
LNG as an energy source is supplied to the barge 2 from an LNG tank near the dock 10.

In this embodiment, since the ASU plant 6 including the rectification tower which may not operate normally due to shaking is employed, it is preferable to perform gas production during the transportation of the barge 2. Instead, it is preferable that gas is produced after the barge 2 is fixed to the dock 10.

In the present embodiment, the dock 10 for arranging the barges 2 does not need to be newly formed. For example, a dock that meets various conditions is selected from the existing docks that are at rest, and if necessary, this can be selected. Can be remodeled, so that the barge 2 can be relocated and secured at low cost.

FIG. 3 is a plan view schematically showing a state in which the barge 2 is laterally fixed to the berth 15 at a position away from the quay in the present embodiment. In FIG. 3, the berth 15 is provided at a position away from the quay 16 so that the ship 3 and the barge 2 connected thereto can be laid sideways and anchored. In the opposite area of the berth 15, a plurality of liquefied gas tanks 12 for storing liquefied gas and an LN for supplying LNG to the barge 2 are provided.
A G tank (not shown) is provided.

In this embodiment, the ASU plant 6
Is transported by the boat 3 to the desired berth 15 and is fixed to the berth 15 sideways. At this time, the ship 3 may be separated from the barge 2. Then, the buffer tank in the barge 2 horizontally fixed to the berth 15 is connected to the liquefied gas tank 12 according to the type of gas via the pipeline 14. Further, LNG as an energy source is supplied to the barge 2 from a nearby LNG tank.

By operating the ASU plant 6 in the barge 2 in such a state, the liquefied gas tank 12
Liquefied nitrogen, liquefied oxygen and the like. However, in this case, as described above, the ASU having the rectification column
Since the plant 6 is vulnerable to shaking, it is necessary to set conditions (such as the method of fixing the barge, the location of the berth 15, and weather conditions) so that the ASU plant 6 hardly shakes.

In the present embodiment, the berth 15 for arranging the barges 2 does not need to be newly formed, but may be any berth that meets various conditions from the existing berths. A fixed place can be secured at low cost.

As described above, according to the present embodiment, the AS
Since the liquefied gas producing means including the U plant 6 is provided on the barge 2, the liquefied gas producing means is moved to an arbitrary location at the waterside by moving the barge 2 by the ship 3 on the water surface such as the sea or a lake. Can be relocated. Therefore, when the local demand increases, it is possible to quickly respond to the increase in the gas demand by replacing the barge with a larger gas production capacity or adding a barge with another liquefied gas production system. Further, when the regional demand decreases, it is possible to respond to the demand decrease by replacing the barge with a barge having a smaller gas production capacity or removing the existing barge itself. That is, according to the present embodiment, since the barge 2 having the gas production capacity according to the local demand can be relocated, the operation rate of the equipment is improved, and the equipment can be used efficiently. Therefore, it is possible to reduce the management risk relating to gas production.

Further, by transferring the barge 2 of the present embodiment to the dock 10 or the berth 15 as close as possible to the gas demand area, the gas transportation cost can be greatly reduced. Further, in the present embodiment, a liquefied gas can be produced, so that costs required for storage and transportation can be reduced as compared with a case where a non-liquefied gas is produced.

Further, in the present embodiment, gas can be supplied only by transferring the previously assembled barge 2 by the ship 3, so that the system assembling work at the gas supply location is unnecessary, and the order is relatively small. In a short period of time,
Moreover, gas supply at low cost becomes possible.

When gas is produced at sea with the barge 2 laid on a berth 15 or the like as shown in FIG. 3, a land area large enough for gas production is landed. Even if you can not prepare
It is possible to produce gas.

In the liquefied gas production system 1 according to the present embodiment, the barge 2 has no power source for self-propelled traveling, and the barge 2 is connected to the ship 3 capable of self-propelled traveling. , The barge 2 and the ship 3 can be separated at the destination. Therefore, it is possible to relocate only the barge 2 to a shore-based facility such as a dock 10 from which water is drained, and to achieve stable gas production at the relocation destination without being affected by shaking due to waves. Further, as compared with the case where the liquefied gas producing means is provided inside the ship as in the second embodiment described later, the cost advantage is great in that the existing ship 3 can be used as it is.

Further, since the barge 2 does not have a power source such as an engine for running on its own, the barge 2 itself can be made relatively small. Therefore, when the barge 2 is relocated to a dock-side facility such as a dock 10 from which water is drained at a transport destination, the barge 2 can be installed in a relatively small dock 10.

In this embodiment, since the liquefied gas producing means including the ASU plant 6 is provided in the barge 2, it is not preferable to perform the gas production while moving over water, but the liquefied gas producing means which does not use the rectification column is preferred. When is adopted, gas can be produced even while moving on water. In this case,
Efficient gas production can be performed by effectively utilizing the time during the movement of the barge 2 or the like.

In the present embodiment, the barge 2 and the ship 3
Is connected only by two chains 4, but for example, a bridge may be bridged between the barge 2 and the ship 3 so that the crew can move between the two. Good.
This makes it possible to easily monitor and check the barge 2 during transportation.

Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a schematic plan view of a liquefied gas production system according to a second embodiment of the present invention, and FIG. 5 is a schematic sectional view thereof. FIG. 6 is a schematic plan view showing a state where the container storing the liquefied gas is raised and lowered in the liquefied gas production system of the present embodiment.

The liquefied gas production system 20 of the present embodiment
Is provided with facilities for producing liquefied hydrogen (and / or liquefied carbon dioxide) in a ship 22 capable of running on its own. In the upper front part of the hull of the ship 22, a driving accommodation room 29 for operating the ship 22 and for accommodation of occupants is provided, and a power source (not shown) is provided in the hull.
In the present embodiment, the LNG tank 23, the reforming and refining unit 24, the liquefaction unit 25, the liquefied hydrogen tank 26, the liquefied hydrogen container 27, the in-house power generation facility 2
8 are arranged.

The LNG tank 23 stores liquefied natural gas used as a source of hydrogen to be produced and used as an energy source in the ship 22 in addition to the private power generation facility 28. Note that LPG can be used instead of LNG. The private power generation equipment 28 receives the supply of liquefied natural gas from the LNG tank 23 and generates electric power used in the reforming and refining unit 24, the liquefaction unit 25, and the like.

The reforming and refining section 24 includes the LNG tank 2
A hydrogen-rich gas is produced by reforming methane, propane, etc. contained in the liquefied natural gas in 3 using a catalyst, and this gas is purified by a pressure swing adsorption method to produce high-purity hydrogen gas. . In addition, as a part of the raw material of hydrogen, waste plastics can be used in consideration of the influence on the environment. The liquefaction unit 25 liquefies the hydrogen gas sent from the reforming and refining unit 24 by adiabatic expansion using cold to produce liquefied hydrogen (LH2). The liquefaction unit 25 is provided with equipment for producing liquid air for cooling.

The liquefied hydrogen tank 26 is a buffer tank for performing gas-liquid separation of the liquefied hydrogen produced in the liquefaction unit 25. Then, the liquefied hydrogen produced by the liquefied gas production system 20 of the present embodiment is finally stored in the liquefied hydrogen container 27.

In the case where liquefied hydrogen is produced using the reforming / refining unit 24 and the liquefying unit 25 as in the present embodiment, unlike the first embodiment, it is hardly affected by shaking. Therefore, it is possible to produce liquefied hydrogen not only while the ship 22 is anchored but also while sailing. Therefore, it is possible to efficiently produce liquefied hydrogen.

Next, in this embodiment, the lifting and lowering of the liquefied hydrogen container 27 loaded on the ship 22 will be described. As shown in FIG. 6, when lowering the liquefied hydrogen container 27 loaded on the ship 22 from the ship 22, the ship 22 is anchored at a location facing the common unloading facility 31 at the port. Then, the container 27 is carried out of the ship 22 using the common unloading facility 31, and the container 27 is lowered to the container storage 32. The container 27 may be loaded on a lorry from the container storage 32 and transported to a demand place as it is, or may be supplied to an arbitrary place connected by a pipe. The common unloading facility 31 is also used when loading the container 27 on the ship 22. That is, the liquefied gas production system 20 of the present embodiment has an advantage that no special equipment is required for raising and lowering the produced liquefied gas, and existing equipment can be used as it is.

The LNG tank 23 in the ship 22
Another LNG tank for supplying G is container storage 3
2, the LNG tank 23 in the ship 22
It is preferable that LNG can be replenished.

The liquefied gas production system 20 of the present embodiment
According to this, substantially the same advantages as the liquefied gas production system 1 of the first embodiment can be obtained. That is, since the liquefied hydrogen production means such as the reforming and refining unit 24 and the liquefaction unit 25 are provided in the ship 22 that can travel on its own,
By moving the ship 22 on the surface of the water such as the sea or a lake, the liquefied hydrogen producing means can be relocated to an arbitrary place near the water. Therefore, it is possible to quickly respond to fluctuations in the local demand for gas, thereby improving the operation rate of the equipment and enabling efficient use of the equipment. Therefore, it is possible to reduce the management risk relating to gas production.

Further, by mooring the ship 22 of the present embodiment in a port as close as possible to the gas demand area, gas transportation costs can be greatly reduced. Further, in the present embodiment, a liquefied gas can be produced, so that costs required for storage and transportation can be reduced as compared with a case where a non-liquefied gas is produced.

Further, in this embodiment, since the liquefied gas producing means is provided in the ship 22, it is not necessary to assemble the system in the gas supply area, and it is possible to reduce the time in a relatively short time from receiving the order. Gas supply at a cost becomes possible.

Further, in this embodiment, since gas is produced in the ship 22, even if a land large enough for gas production cannot be prepared on land, It is possible to produce gas.

Further, according to the liquefied gas production system 20 of the present embodiment, since the liquefied gas production means is provided in the ship 22, it is different from the liquefied gas production system 1 of the first embodiment. As compared with the case where the barge 2 provided as a body and the ship 3 are connected, the barge 2 does not hinder the operation of the ship 3 and the ship 22 can be stably moved at a large speed. There is an advantage.

Next, a third embodiment of the present invention will be described with reference to FIG. The liquefied gas production system according to the present embodiment includes a liquefied gas production unit using air separation similar to that of the first embodiment on a barge provided separately from a ship as described in the first embodiment. And a means for producing a liquefied gas by reforming the raw material similar to that of the second embodiment, and this barge is connected to a ship capable of running on its own.

FIG. 7 is a schematic plan view showing a schematic configuration of a liquefied gas production system according to a third embodiment of the present invention. As shown in FIG. 7, the liquefied gas production system 40 according to the present embodiment includes a barge (barge) 42 which is a floating body movable on water, a ship 3, and two ships connecting the barge 42 and the ship 3. And is floating on the sea 5.

In the present embodiment, the barge 42, which is a structure that can float and move on water, has no power source for traveling and cannot travel on its own. However,
Since the barge 42 is connected to the ship 3 which can travel on its own through the chain 4, it is possible to transport the barge 42 to an arbitrary location near the water.

The barge 42 includes an ASU plant 6 and an LNG tank 7 as in the barge 2 of the first embodiment.
And a private power generation facility 8. These devices 6
The structures and functions of Nos. To 8 are the same as those of the first embodiment. In addition, the barge 42 includes the ship 22 of the second embodiment.
The same reforming and refining unit 24 as was located in
Liquefaction unit 25, liquefied hydrogen tank 26, liquefied hydrogen container 2
7 are arranged. The structures and functions of these devices 24-27 are the same as in the second embodiment. Note that the LNG tank 23 and the private power generation facility 28 according to the second embodiment are not provided in this embodiment because the LNG tank 7 and the private power generation facility 8 can be shared.

According to the liquefied gas production system of the present embodiment, liquefied oxygen, liquefied nitrogen and the like can be produced by the ASU plant 6, and liquefied hydrogen and liquefied carbon dioxide gas can be produced by the reforming and refining unit 24 and the liquefaction unit 25. Can be produced. Further, as described above, since the LNG tank 7 and the private power generation facility 8 can be shared, there is an advantage that the facility can be simplified.

The barge 42 of this embodiment can be moved into the dock 10 described in the first embodiment, or can be laid sideways on the berth 15 described above. A
When liquefied oxygen, liquefied nitrogen, or the like is produced by the SU plant 6, it is preferable to produce gas in such a state. In the case of producing liquefied hydrogen, as described in the second embodiment, it is preferable to raise and lower the container 27 at the port having the common unloading facility 31, but for example, the common unloading facility 31 is attached to the dock 10. It may be provided to allow the container 27 to be raised and lowered there.

In addition, according to the present embodiment, substantially the same advantages as in the above-described embodiment can be obtained. That is, since the liquefied gas production means can be relocated to an arbitrary location at the water's edge, it is possible to quickly respond to changes in the local demand for gas, improving the operation rate of the equipment, Can be used efficiently. Therefore, it is possible to reduce the management risk relating to gas production.

Further, by moving the barge 42 as close to the gas demand area as possible, the gas transportation cost can be greatly reduced. Further, the system assembling work at the gas supply location is not required, and the gas can be supplied in a relatively short period of time after receiving the order and at low cost.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various design changes are possible within the scope of the claims. is there. For example, a barge as a floating body movable on water does not have an ASU plant, and a reforming and refining unit 2 for producing liquefied hydrogen and the like.
4 or only the liquefied part 25 may be used. Further, a liquefied gas producing means other than those described above may be used.

[0068]

As described above, according to claim 1, since the liquefied gas producing means is provided on the floating body,
The liquefied gas producing means can be relocated to an arbitrary location beside the water. As a result, it is possible to respond quickly to changes in regional demand for gas, improving the utilization rate of equipment,
Equipment can be used efficiently. Further, by moving the liquefied gas production system of the present invention to a place as close as possible to the gas demand area, the transportation cost of the produced gas can be significantly reduced. Also, there is no need to assemble the system in the gas supply area, and gas can be supplied only by relocating the pre-assembled liquefied gas production system. Supply becomes possible.

Further, according to the liquefied gas production system of the first aspect, since the liquefied gas production means is provided on the floating body, gas can be produced on the water, and a land area large enough for the gas production. It is possible to produce gas even if it cannot be prepared on land. Further, since gas can be produced even on water, efficient gas production can be performed by effectively utilizing the time during moving the liquefied gas production system.

According to the liquefied gas production system of the present invention, the floating body provided with the liquefied gas producing means and the ship can be separated at the destination, so that only the floating body is moved to a land facility such as a dock. It is possible. Therefore, stable gas production can be performed at the relocation destination without being affected by shaking due to waves. In addition, there is a great cost advantage in that existing ships can be used as they are. Further, since the floating body does not have a power source such as an engine for self-propelled traveling, the floating body itself can be made relatively small. Therefore, when a floating body is relocated to a land facility such as a dock at a transport destination, the floating body can be installed in a relatively small facility.

According to the liquefied gas production system of the third aspect, air containing components such as nitrogen, oxygen and argon can be supplied by the cryogenic air separation means using the rectification column.

According to the liquefied gas production system of the fourth aspect, since the liquefied gas production means is provided on the ship capable of running on its own, substantially the same advantages as in the first aspect can be obtained. For example, when compared with a case where a floating body provided as a separate body and a ship are connected as in claim 2, the floating body does not hinder the operation of the ship, and moves the ship stably at a large speed. There is an advantage that it can be done.

According to the liquefied gas production system of the fifth aspect, the liquefied gas production means including the reforming means and the liquefaction means supplies the components such as hydrogen and carbon dioxide contained in the raw material at the transfer destination. Can be.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing a schematic configuration of a liquefied gas production system according to a first embodiment of the present invention.

FIG. 2 is a plan view schematically showing a state in which the barge shown in FIG. 1 is fixed in a dock.

FIG. 3 is a plan view schematically showing a state in which the barge depicted in FIG. 1 is fixed laterally to a berth located at a position away from the quay.

FIG. 4 is a schematic plan view of a liquefied gas production system according to a second embodiment of the present invention.

FIG. 5 is a schematic sectional view of a liquefied gas production system according to a second embodiment of the present invention.

FIG. 6 is a schematic plan view showing a state where a container for storing liquefied gas is raised and lowered in a liquefied gas production system according to a second embodiment of the present invention.

FIG. 7 is a schematic plan view illustrating a schematic configuration of a liquefied gas production system according to a third embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 liquefied gas production system 2 barge (barge) 3 ship 4 chain 5 sea 6 ASU plant 7 LNG tank 8 private power generation facility 10 dock 12 liquefied gas tank 15 berth

Claims (5)

[Claims] 1. A liquefied gas production system, wherein a liquefied gas production means is provided on a floating body movable on water. 2. The liquefied gas production system according to claim 1, wherein the floating body does not have a power source for self-traveling, and the floating body is connected to a ship capable of self-traveling. . 3. The liquefied gas production system according to claim 1, wherein the liquefied gas production unit includes a cryogenic air separation unit using a rectification column. 4. A liquefied gas production system characterized in that liquefied gas production means is provided in a ship capable of running on its own. 5. The liquefied gas producing means according to claim 1, wherein said liquefied gas producing means includes a raw material reforming means and a gas liquefying means obtained by said reforming means. The described gas production system.