KR101972915B1 - Large storage tank for cryogenic liquid having insulating layer - Google Patents

Large storage tank for cryogenic liquid having insulating layer Download PDF

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Publication number
KR101972915B1
KR101972915B1 KR1020170076310A KR20170076310A KR101972915B1 KR 101972915 B1 KR101972915 B1 KR 101972915B1 KR 1020170076310 A KR1020170076310 A KR 1020170076310A KR 20170076310 A KR20170076310 A KR 20170076310A KR 101972915 B1 KR101972915 B1 KR 101972915B1
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South Korea
Prior art keywords
high vacuum
outer container
insulation layer
container
inner container
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KR1020170076310A
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Korean (ko)
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KR20180137621A (en
Inventor
김남국
정일영
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(주)하나파워시스템서비스
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Priority to KR1020170076310A priority Critical patent/KR101972915B1/en
Priority to PCT/KR2018/006781 priority patent/WO2018231004A1/en
Publication of KR20180137621A publication Critical patent/KR20180137621A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
    • B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3802—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container in the form of a barrel or vat
    • B65D81/3806—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container in the form of a barrel or vat formed with double walls, i.e. hollow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3802—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container in the form of a barrel or vat
    • B65D81/3811—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container in the form of a barrel or vat formed of different materials, e.g. laminated or foam filling between walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/04—Vessels not under pressure with provision for thermal insulation by insulating layers

Abstract

A large cryogenic storage tank with a thermal barrier layer is presented. The large cryogenic storage tank according to one embodiment includes an outer container; An inner container which is accommodated in the outer container at a predetermined interval and stores a cryogenic material therein; A high vacuum super insulated layer in which a space portion maintained in a high vacuum state is formed in a space between the outer container and the inner container; And a filling insulation layer filled with pearlite insulation material in a space between the high vacuum super insulation layer and the inner container and maintained in a low vacuum state.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cryogenic storage tank for a cryogenic storage tank,

The following examples relate to a large cryogenic storage tank with a thermal barrier formed.

The cryogenic storage tank, such as the LNG storage tank, is composed of an inner vessel for storing the liquefied gas and an outer vessel for maintaining the temperature of the cryogenic liquefied gas stored in the inner vessel, Is filled with a cold insulator powder as a heat insulating material and has a structure that can minimize evaporation of liquefied gas by minimizing heat invasion by maintaining a low vacuum state.

On the other hand, a cryogenic storage tank generally stores and transports Liquefied Natural Gas (LNG) used for land, offshore plant, ship or the like. To this end, the interior container and the outer container are filled with a heat insulating material Followed by vacuum insulation. In particular, large cryogenic storage tanks, such as 100 to 200 m 3 , are increasingly being used as fuel tanks for vessels such as LNG bunkering.

1 is a schematic view for explaining a conventional ultra-low temperature storage tank.

1, a conventional ultra-low temperature storage tank 10 has a double structure of an outer container 11 and an inner container 12, and a pearlite Perlite powder) and then vacuumed. For example, the thickness of the tank wall of the outer vessel 11 and the inner vessel 12 may be about 8 to 12 mm, and the heat insulating space between the outer vessel 11 and the inner vessel 12 may be about 240 mm. Since the space between the outer vessel 11 and the inner vessel 12 is filled with the heat insulating material of powder, evaporation loss due to heat invasion from the outside can be prevented.

However, in the existing ultra-low temperature storage tank of a large-sized vessel, pearlite powder and a vacuum of 10 -2 Torr are applied to a tank space of about 240 mm between the tanks of the outer vessel 11 and the inner vessel 12, The inside liquid inside is evaporating and the insulation effect is not good. Super insulation may be applied to enhance the insulation effect, but a large tank such as 100 to 200 m 3 is not applicable since it has difficulties in applying super insulation to which a high vacuum is applied due to a large space of the inner vessel and the outer vessel.

Here, the application of high vacuum applied insulation is 10 -5 Torr, and the conduction and convection heat transfer are greatly reduced, resulting in a very high insulation effect. However, in case of large storage tank, the length is 20 ~ 30m and applying high vacuum to the large storage tank has the limitation of pump capacity, it is time consuming and difficult to apply, .

Korean Patent No. 10-1437581 relates to such a cryogenic storage tank, and describes a technique relating to a cryogenic storage tank for easily preventing heat invasion from the outside through improvement of the heat insulation performance.

Embodiments describe a large cryogenic storage tank, and more specifically, a technique for a large cryogenic storage tank comprising a three-layered insulating layer.

Embodiments provide a large cryogenic storage tank that prevents evaporation loss due to heat penetration from the outside by applying a high vacuum super insulation layer inside a container or by forming a high vacuum super insulation layer on the outside of the inner container.

The large cryogenic storage tank according to one embodiment includes an outer container; An inner container which is accommodated in the outer container at a predetermined interval and stores a cryogenic material therein; A high vacuum super insulated layer in which a space portion maintained in a high vacuum state is formed in a space between the outer container and the inner container; And a filling insulation layer filled with pearlite insulation material in a space between the high vacuum super insulation layer and the inner container and maintained in a low vacuum state.

According to another aspect of the present invention, the outer container and the inner container are formed in a cylindrical or polygonal columnar shape, and the high-vacuum super-insulating layer is formed by welding at least a part of the inner wall of the outer container with a cylindrical or polygonal- High vacuum super insulation can be applied.

According to another aspect of the present invention, the outer container and the inner container are formed into a cylindrical shape or a polygonal columnar shape, and the high-vacuum super-insulating layer has a cylindrical or polygonal columnar space portion welded to the outer wall of the inner container High vacuum super insulation may be applied.

According to another aspect of the present invention, the outer container, the inner container, and the high-vacuum super-insulating layer have a cylindrical shape or a polygonal columnar shape and are spaced apart from each other by a predetermined distance. The space between the outer container and the high- The high vacuum super insulation layer and the space between the inner container may be formed of the filling insulating layer in which the vacuum is maintained after the insulating material is filled.

Here, a plurality of units including the outer container, the inner container, the high vacuum super insulative layer, and the packed heat insulating layer may be formed, and one large tank may be formed by vertically or horizontally coupled to each other. Both ends of the outer container may be formed with a coupling portion in which the high vacuum super insulation layer is not formed for coupling with different outer containers.

According to the embodiments, it is possible to provide a large ultra-low temperature storage tank that prevents evaporation loss due to heat invasion from the outside by providing a high vacuum super insulation layer inside the outer container or outside the inner container and applying high vacuum super insulation.

1 is a schematic view for explaining a conventional ultra-low temperature storage tank.
2 is a schematic view for explaining a large cryogenic storage tank in which a heat insulating layer is formed inside an outer tank wall according to an embodiment.
3 is a view showing an example of a large cryogenic storage tank in which a heat insulating layer according to an embodiment is formed.
4 is a schematic view for explaining a large cryogenic storage tank in which a heat insulating layer is formed outside the inner tank wall according to another embodiment.
5 is a schematic view for explaining a large cryogenic storage tank in which an independent heat insulating layer is inserted between an outer tank and an inner tank according to another embodiment.
6 is a schematic view for explaining a large cryogenic storage tank in which a heat insulating layer is formed inside a polygonal outer tank wall according to another embodiment.
FIG. 7 is a graph showing the thermal conductivity and temperature gradient of a conventional ultra-low temperature storage tank.
FIG. 8 is a graph showing the thermal conductivity and temperature gradient of a large-scale cryogenic storage tank according to an embodiment.

Hereinafter, embodiments will be described with reference to the accompanying drawings. However, the embodiments described may be modified in various other forms, and the scope of the present invention is not limited by the embodiments described below. In addition, various embodiments are provided to more fully describe the present invention to those skilled in the art. The shape and size of elements in the drawings may be exaggerated for clarity.

The following examples describe a large cryogenic storage tank, and more specifically, a technique for a large cryogenic storage tank comprising a three-layered insulating layer. Embodiments provide a large ultra-low temperature storage tank in which a high-vacuum super-insulating layer is formed on the inside of an outer container or an outer container to apply a high-vacuum super insulation to prevent evaporation loss due to heat penetration from the outside. Further, a high vacuum super insulation layer may be formed between the outer vessel and the inner vessel to apply a high vacuum super insulation.

2 is a schematic view for explaining a large cryogenic storage tank in which a heat insulating layer according to an embodiment is formed.

2, a large-scale cryogenic storage tank 100 according to one embodiment includes a double structure of an outer container 110 and an inner container 120, and is disposed between the outer container 110 and the inner container 120 A filling insulating layer 130 filled with a heat insulating material is formed. And a high vacuum super insulation layer 140 for super vacuum can be formed on the inner surface of the outer vessel 110. [ The outer container 110 and the inner container 120 may have a cylindrical shape, but the shape thereof is not limited. Here, the outer container 110 and the inner container 120 have a cylindrical shape will be described in more detail as an example.

The outer container 110 has a cylindrical shape and a cylindrical inner container 120 may be accommodated in the outer container 110 at a predetermined interval. For example, the inner container 120 may store various kinds of extremely low temperature and low temperature fluids such as liquid nitrogen, liquid oxygen, liquid argon, LNG, and the like. In order to insulate such a cryogenic material, a heat insulating layer is required outside.

The high-vacuum super insulative layer 140 can be kept in a vacuum state by forming the space portion 141 at least in a part of the inner wall of the outer container 110. More specifically, the high-vacuum super insulation layer 140 may be formed by welding a cylindrical space 141 to the inner wall of the outer vessel 110, and a high vacuum super insulation may be applied. Here, the high vacuum super insulation is applied with 10 -5 Torr, and the conduction and convection heat transfer are greatly reduced, and the effect of insulation is greatly increased.

The filling insulating layer 130 can fill the space formed between the high vacuum super insulation layer 140 and the inner vessel 120 and maintain the vacuum state. At this time, the insulated material to be filled can be a powdered insulated material. For example, the filling insulating layer 130 may be filled with a heat insulating material such as perlite powder and then vacuumed. In addition, it is possible to form a high-efficiency storage tank in which a heat insulating effect is greatly improved, as well as a pearlite powder, a urethane block and a radiant heat blocking agent. For example, various insulation materials such as Mylar and aluminum foil can be applied as a vacuum radiation shielding material, and urethane foam as an external solid insulation material, as well as various insulating materials such as glass wool, vacuum panel, and beckle.

The filling insulating layer 130 may be maintained in a vacuum state after the insulating material is filled, and the vacuum state may be a low vacuum state lower than a high vacuum state of the high vacuum super insulation layer 140. For example, the filling insulating layer 130 may be vacuum insulation of 10 -2 Torr after the pearlite powder is filled, and vacuum insulation of 10 -5 Torr may be applied to the high vacuum super insulation layer 140.

A large cryogenic storage tank in which a heat insulating layer according to one embodiment is formed will be described in more detail below as an example. The numerical values used herein are by way of example only and not by way of limitation.

For example, the thickness of the tank wall of the outer container 110 is about 6 to 8 mm, and the thickness of the high-vacuum super insulation layer 140 formed on the inner wall of the outer container 110 is about 20 to 50 mm. The thickness of the tank wall of the inner container 120 may be about 8 to 12 mm. 1, the thickness of the tank wall of the outer container 11 and the inner container 12 is about 8 to 12 mm, and the outer container 11 and the inner container 12 ) May be about 240 mm. In order to form the high vacuum super insulation layer 140 in the conventional ultra low temperature storage tank, the thickness of the outer container 110 is made thinner than that of the conventional outer container 110, and a high vacuum super insulation layer 140 is formed on the inner wall of the outer container 110 can do. At this time, the high-vacuum super insulative layer 140 can secure the size of the space 141 sufficient for heat insulation, thereby preventing evaporation loss due to heat invasion from the outside when storing the cryogenic material in the inner vessel 120.

Therefore, since the filling insulating layer 130, which is the space between the outer vessel 110 and the inner vessel 120, is filled with the heat insulating material of powder, evaporation loss due to heat invasion from the outside can be prevented. Further, by forming the high vacuum super insulation layer 140 on the inner wall of the outer vessel 110 and applying the high vacuum super insulation, the conduction and the convection heat transfer are greatly reduced and the heat insulation effect is very large.

3 is a view showing an example of a large cryogenic storage tank in which a heat insulating layer according to an embodiment is formed.

As shown in FIG. 3, the outer container 110, the inner container 120, the high vacuum super insulation layer 140, and the filling insulation layer 130 may form a single unit. A plurality of such units may be formed and joined together vertically or horizontally to form a large cryogenic storage tank.

At this time, both ends of the outer container 110 may be formed with a coupling portion in which the high vacuum super insulation layer 140 is not formed for coupling with the different outer container 110. For example, the plurality of outer vessels 110 may be joined by welding or the like for the purpose of engagement. At this time, both ends of the outer container 110 may be used as a space for welding by forming a coupling portion in which the high vacuum super insulation layer 140 is not formed for coupling with the different outer container 110. In another example, both ends of the outer vessel 110 are formed with coupling portions that are not formed of the high vacuum superfluous layer 140 for coupling with the different outer vessels 110, and both ends of the outer vessel 110 have diameters of one side and the other side The other side of the outer container 110 may be fitted to one side of the outer container 110. [

As described above, the large cryogenic storage tank including a plurality of units may have a double tank structure where the different outer vessels 110 are coupled to each other, and a heat insulating portion other than the coupling portion may have a triple tank structure.

Herein, the double tank structure means a structure in which a packed and adiabatic layer 130 is formed in a space between the outer container 110 and the inner container 120, and the triple tank structure includes the outer container 110 and the inner container 120 And a high-vacuum super-insulating layer 140 may be formed in a space between the upper insulating layer 130 and the upper insulating layer 140. [

For example, one unit including the outer container 110, the inner container 120, the high vacuum super insulation layer 140, and the filling insulation layer 130 may have a unit length of about 5 m. At this time, the high-vacuum super insulation layer 140 formed on the inner wall of the outer vessel 110 may have a length of about 4.6 m. That is, a high vacuum super insulation layer 140 having a length of about 4.6 m is formed on at least a part of the inner wall of the outer vessel 110, and a supporting system or a welding system Lt; / RTI > can be hypothesized. The high vacuum super insulation layer 140 is not formed at this coupling portion. If the cylinder length of the large cryogenic storage tank is 20 m, four units of 5 m are connected.

In this way, a cylinder having an internal space is formed inside the outer cylinder, and a high vacuum is applied to the space, so that it is possible to apply a high vacuum super insulation to a large tank. As a result, the amount of evaporation is reduced by about 40 to 45%, and when the high-vacuum super insulation layer is increased, the amount of evaporation is also increased.

Conversely, when the amount of evaporation is the same, the internal and external insulation intervals are reduced and the internal storage capacity can be increased. Here, the outer tube means the outer container 110 described above, and the inner tube can mean the inner container 120.

As described above, according to the embodiments, since the space of the outer container 110 and the inner container 120 of the large tank of 100 to 200 m 3 is very large, it is difficult to apply the super insulation to which the high vacuum is applied, Super insulation can increase the insulation effect.

4 is a schematic view for explaining a large cryogenic storage tank in which a heat insulating layer is formed outside the inner tank wall according to another embodiment.

4, a large-scale cryogenic storage tank 100 according to another embodiment includes a double structure of an outer container 110 and an inner container 120, and is disposed between the outer container 110 and the inner container 120 A filling insulating layer 130 filled with a heat insulating material is formed. And a high vacuum super insulation layer 140 for super vacuum may be formed on the outer surface of the inner container 120. [

The outer container 110 has a cylindrical shape and a cylindrical inner container 120 may be accommodated in the outer container 110 at a predetermined interval. The inner vessel 120 may store the cryogenic material therein.

The high vacuum super insulative layer 140 can be kept in a vacuum state by forming a space portion in at least a part of the outer wall of the inner container 120. [ More specifically, the high-vacuum super insulation layer 140 is formed by welding on the outer wall of the inner vessel 120, and a cylindrical vacuum space can be formed so that a high vacuum super insulation can be applied. Here, the high vacuum super insulation is applied with 10 -5 Torr, and the conduction and convection heat transfer are greatly reduced, and the effect of insulation is greatly increased.

The filling insulating layer 130 can fill the space formed between the high vacuum super insulation layer 140 and the outer vessel 110 and maintain the vacuum state. At this time, the insulated material to be filled can be a powdered insulated material. For example, the filling insulating layer 130 may be filled with a heat insulating material such as perlite powder and then vacuumed. In addition, it is possible to form a high-efficiency storage tank in which a heat insulating effect is greatly improved, as well as a pearlite powder, a urethane block and a radiant heat blocking agent. For example, it is possible to apply various insulation materials such as glass wool, vacuum panel, and bequite in addition to urethane foam as an external solid insulation material, and various materials such as Mylar and aluminum foil as a vacuum radiation shielding material.

5 is a schematic view for explaining a large cryogenic storage tank in which an independent heat insulating layer is inserted between an outer tank and an inner tank according to another embodiment.

5, a large-scale cryogenic storage tank 100 according to another embodiment of the present invention includes a double structure of an outer container 110 and an inner container 120, And a filling heat insulating layer 130 filled with a heat insulating material is formed in the space between them. A high vacuum super insulation layer 140 may be formed in the space between the outer container 110 and the inner container 120 for a super vacuum of an independent structure. For example, a super insulation panel of an independent structure may be inserted between the outer container 110 and the inner container 120. [

Here, the outer container 110, the inner container 120, and the high-vacuum super insulation layer 140 may have a cylindrical shape, but the shape thereof is not limited. Here, the outer container 110, the inner container 120, and the high-vacuum super insulation layer 140 are formed in a cylindrical shape.

That is, the high vacuum super insulative layer 140 can be accommodated in the outer container 110 at a predetermined interval, and the inner container 120 can be accommodated in the high vacuum super insulative layer 140 with a predetermined distance therebetween.

Accordingly, the high-vacuum super insulation layer 140 may be independently formed between the outer container 110 and the inner container 120, so that the inside can be maintained in a vacuum state. The filling insulation layer 130 is formed between the space between the outer container 110 and the high vacuum super insulation layer 140 and the space between the high vacuum super insulation layer 140 and the inner container 120, The state can be maintained.

6 is a schematic view for explaining a large cryogenic storage tank in which a heat insulating layer is formed inside a polygonal outer tank wall according to another embodiment.

Referring to FIG. 6, the large cryogenic storage tank in which the heat insulating layer is formed inside the polygonal outer tank wall according to another embodiment may have a polygonal column shape. More specifically, the outer container 110 is formed in a polygonal columnar shape, and the inner container 120 having a polygonal columnar shape can be accommodated in the outer container 110 at a predetermined interval. The inner vessel 120 may store the cryogenic material therein.

Here, a high vacuum super insulation layer is formed inside the outer vessel 110 or outside the inner vessel 120, so that evaporation loss due to heat invasion from the outside can be prevented by applying high vacuum super insulation.

In one example, the high vacuum super insulative layer 140 may be kept in a vacuum state by forming a space portion in at least a part of the inner wall of the outer container 110. The filling insulating layer 130 can fill the space formed between the high vacuum super insulation layer 140 and the inner vessel 120 and maintain the vacuum state. At this time, the insulated material to be filled can be a powdered insulated material.

As another example, the high vacuum super insulation layer 140 may be kept in a vacuum state by forming a space portion in at least a part of the outer wall of the inner container 120. The filling insulating layer 130 can fill the space formed between the high vacuum super insulation layer 140 and the outer vessel 110 and maintain the vacuum state.

As another example, the high vacuum super insulation layer 140 may be independently formed between the outer vessel 110 and the inner vessel 120 so that the inside can be maintained in a vacuum state. The filling insulation layer 130 is formed between the space between the outer container 110 and the high vacuum super insulation layer 140 and between the high vacuum super insulation layer 140 and the inner space 120. The vacuum insulation layer 130 is filled with the heat insulation material, .

FIG. 7 is a graph showing the thermal conductivity and temperature gradient of a conventional ultra-low temperature storage tank. And FIG. 8 is a graph showing a thermal analysis and a temperature gradient of a large-scale cryogenic storage tank according to an embodiment.

Referring to FIGS. 7 and 8, it is possible to compare the intrusion heat quantity of the conventional ultra-low temperature storage tank and the large ultra low temperature storage tank according to one embodiment. The criterion for the analysis is 200 m 3 , and the inner container of the large cryogenic storage tank according to one embodiment has a diameter of 3.6 m and a total length of 20 m.

First, thermal analysis of a conventional ultra-low temperature storage tank can be expressed as follows.

Pearlite powder + 10 -2 Torr vacuum insulation

Wall heating: 12.7 W / m 2

Total wall penetration calories

= Inner wall surface area x incoming calorie

= 246.4 m 2 x 12.7 W / m 2

= 3,129 W

Next, the thermal analysis of the large cryogenic storage tank according to one embodiment can be expressed as follows.

The total calorimetric analysis can be expressed as follows.

Wall heating: 6.9 W / m 2

Total wall penetration calories

= Inner wall surface area x incoming calorie

= 246.4 m 2 x 6.9 W / m 2

= 1,700 W

The heat transfer analysis can be expressed as follows.

Compared with the conventional ultra-low temperature storage tank, it can be expressed as follows.

1700W / 3129W = 54% heat input

40 ~ 45% reduction in vaporization

That is, the large cryogenic storage tank according to one embodiment can achieve a heat input of 54% and a vapor reduction of 40 to 45% as compared with a conventional cryogenic storage tank.

According to the embodiments as described above, it is possible to provide a large-sized ultra-low temperature storage tank that prevents evaporation loss due to heat penetration from the outside by forming a high vacuum super insulation layer inside the outer container and applying high vacuum super insulation. More specifically, a vacuum is applied between an outer container and an inner container in a large cryogenic tank having a double structure of an inner container and an outer container, and a vacuum is applied between the outer wall of the inner container and the outer wall of the inner container or between the outer container and the inner container. The thermal efficiency can be increased by additionally inserting insulation.

The large cryogenic storage tank according to these embodiments can be applied to vertical and horizontal cryogenic storage tanks and can be used for various types of cryogenic and low temperature fluid tanks such as liquid nitrogen, liquid oxygen, liquid argon, LNG storage tanks, It can be used for marine use, especially as a medium to large tank for LNG bunkering.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

Also, the terms " part, " " module, " and the like, which are described in the specification, mean a unit for processing at least one function or operation, and may be implemented by hardware or software or a combination of hardware and software.

It is to be understood that the components of the embodiments described with reference to the drawings are not limited to the embodiments and may be embodied in other embodiments without departing from the spirit of the invention. It is to be understood that although the description is omitted, multiple embodiments may be implemented again in one integrated embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, in the case where the described techniques are performed in a different order from the described method, or the system described in FIG. 5, in which the requirement of the steel plate is large and the weight is increased but the super insulation panel is inserted between the inner and outer tubes, , Apparatus, circuitry, etc., may be combined or combined in different forms, substituted or substituted by other components or equivalents, in accordance with the described method, and appropriate results may be achieved.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (6)

An outer container;
An inner container which is accommodated in the outer container at a predetermined interval and stores a cryogenic material therein;
A high vacuum super insulated layer in which a space portion maintained in a high vacuum state is formed in a space between the outer container and the inner container; And
Wherein a space between the outer container and the inner container is filled with a heat insulating material,
/ RTI >
The high-vacuum super-
A cylindrical or polygonal columnar space is attached to the inner wall of the outer container or the outer wall of the inner container by welding to apply a high vacuum super insulation to the inner container and evaporation due to heat penetration from the outside when the cryogenic material is stored in the inner container Wherein a vacuum insulation higher than that of the filling insulation layer is applied so as to prevent a loss and a vacuum insulation is applied to the filling insulation layer after the filling of the insulation with a lower vacuum than that of the high-
A plurality of units including the outer container, the inner container, the high vacuum super insulation layer, and the filling insulation layer are formed to form the high vacuum super insulation layer in a large tank, and a plurality of the units are vertically or horizontally coupled to each other Forming a large tank of < RTI ID = 0.0 >
Wherein both ends of the outer container are formed by joining by welding not having the high vacuum super insulation layer formed therebetween for joining with the outer container different from each other or the diameters of one side and the other side of the coupling portion at both ends of the outer container are different from each other Respectively,
The high vacuum super insulation layer having a cylindrical or polygonal columnar space portion formed by welding is formed on the inner wall of the outer container or the outer wall of the inner container so that the coupling portion is divided into two portions including the outer container and the inner container Wherein a portion excluding the joint portion forms a triple tank structure including the outer container, the high vacuum super insulation layer and the inner container
Large cryogenic storage tank. delete delete The method according to claim 1,
Wherein the outer container, the inner container, and the high vacuum super insulation layer have a cylindrical shape or a polygonal columnar shape,
Wherein a space between the outer container and the high vacuum super insulation layer and a space between the high vacuum super insulation layer and the inner space are maintained in a vacuum state after the insulation is filled,
The high vacuum super insulation layer is applied with vacuum insulation of 10 -5 Torr and the filling insulation layer is applied by vacuum insulation of 10 -2 Torr
Large cryogenic storage tank. delete delete
KR1020170076310A 2017-06-16 2017-06-16 Large storage tank for cryogenic liquid having insulating layer KR101972915B1 (en)

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KR1020170076310A KR101972915B1 (en) 2017-06-16 2017-06-16 Large storage tank for cryogenic liquid having insulating layer
PCT/KR2018/006781 WO2018231004A1 (en) 2017-06-16 2018-06-15 Large cryogenic storage tank having insulation layer formed thereon

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KR1020170076310A KR101972915B1 (en) 2017-06-16 2017-06-16 Large storage tank for cryogenic liquid having insulating layer

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KR102163205B1 (en) 2019-05-08 2020-10-08 한국해양대학교 산학협력단 Cyogenic liquid storage tank using fusion heat

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JPS6116495U (en) * 1984-07-02 1986-01-30 株式会社クボタ Vacuum insulation pipe joint structure
JPS6222485U (en) * 1985-07-23 1987-02-10
JP3428748B2 (en) * 1994-11-16 2003-07-22 株式会社アイ・エイチ・アイ マリンユナイテッド Freestanding square tank for liquid carrier
JPH10141595A (en) * 1996-11-05 1998-05-29 Ishikawajima Harima Heavy Ind Co Ltd Low temperature liquefied gas storage tank
WO2017018699A1 (en) * 2015-07-27 2017-02-02 강희자 Cryogenic liquid storage tank

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