KR20140061657A - Underground type lng storage tank and method for constructing there of - Google Patents

Abstract

A ground storage tank according to an embodiment of the present invention comprises an independent tank forming an inner tank by having a space for storing goods; a sandwich plate which has a pair of steel plates opposed to each other and having stiffeners formed therebetween and a concrete formed between the steel plates and which surrounds right and left circumferences of the independent tank; a perlite disposed between the independent tank and the sandwich plate; and an outer tank roof which covers the upper part of the sandwich plate so as to form an outer tank with the sandwich plate. The ground storage tank and a method for manufacturing the ground storage tank according to the present invention can reduce the number of installations and manufacturing costs through reduction of manpower and can be easily installed polar regions through reduction of the construction period because the sandwich plate which is modularized is constructed without any need to install and dismantle molds.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an underground type LNG storage tank,

The present invention relates to a ground storage tank and a method of manufacturing the same.

Generally, a liquefied natural gas storage tank is for storing or transporting LNG (Liquefied Natural Gas) at a temperature of about -165 DEG C, and may be installed on the ground or buried in the ground depending on the installation position Ground storage tanks, landfill tanks, semi-containment tanks), and mobile storage tanks for vehicles, ships, and other means of transport.

Here, since the liquefied natural gas storage tank stores liquefied natural gas at a cryogenic temperature, there is a risk of explosion upon exposure to impact. For this reason, the structure of the liquefied natural gas storage tank must satisfy conditions such as impact resistance and sealability. To satisfy these conditions, the liquefied natural gas storage tanks consist of a multilayered wall structure. That is, the liquefied natural gas storage tank includes a tank wall (outer tank) on which a storage space is formed, an inner tank (inner tank) that directly contacts the liquefied natural gas and seals the liquefied natural gas, And a perlite that insulates the surface.

In particular, ground storage tanks included in a field type magnetic field tank can generally be constructed as follows.

First, as a foundation for consolidating the ground, concrete is poured into the iron pipe wedge to prevent earthquakes or shocks. Then, a cylindrical side wall construction is performed to determine the storage capacity of the ground storage tank on the foundation foundation. Here, sidewall construction can be accomplished by injecting concrete into the formwork and then removing the formwork if the concrete is solidified. Then, the insulation panel is reinforced on the inner wall and the bottom of the sidewall, and the inner tank is applied to the inner side of the concrete, and then the inner tank is finished.

As described above, when the ground storage tank is constructed using the sidewall, the concrete and the heat insulation panel can not be constructed at the same time. Therefore, the concrete and the insulation panel are formed by using the form, .

It is an object of the present invention to provide a method of improving the insulation performance, impact resistance and durability by using concrete during the construction of a ground storage tank, And a method for producing the same.

According to an aspect of the present invention, there is provided a ground-based storage tank comprising: an independent tank having a space formed therein for storing a stored product; A sandwich plate having a pair of steel plates facing each other and formed with a reinforcing material therebetween, and a concrete formed between the steel plates, the sandwich plate surrounding the left and right circumferential surfaces of the independent tank; A perlite provided between the independent tank and the sandwich plate; And an outer roof covering an upper portion of the sandwich plate and forming an outer tank with the sandwich plate.

According to another aspect of the present invention, there is provided a method of manufacturing a ground storage tank, comprising: forming a floor on a ground; Installing a foam board which is adiabatic on the floor; Providing an independent tank extending upwardly along a circumferential surface of the foam board and having a space therein; Providing a sandwich plate to surround left and right side walls of the independent tank; Filling the pearlite between the independent tank and the sandwich plate; And installing an outer tank roof so that the sandwich plate is closed on the upper portion of the independent tank.

The ground storage tank and the method of manufacturing the same according to the present invention can modularize the sandwich plate without installing and disassembling a separate formwork so that the installation cost can be shortened and the manpower can be saved, The air can be shortened and it can be easily installed in the polar region.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual illustration of a ground storage tank according to an embodiment of the present invention; FIG.
FIG. 2 is a flowchart of a method of manufacturing a ground storage tank according to another embodiment of the present invention.
FIG. 3 is a flowchart showing a step of installing a sandwich plate in a method of fabricating a ground storage tank according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual illustration of a ground storage tank according to an embodiment of the present invention; FIG.

1, a ground storage tank 100 according to an embodiment of the present invention includes a floor 110, a form board 120, an independent tank 130, a sandwich plate (not shown) 140, perlite 150, and roof tile 160.

The bottom 110 may be formed on the paper surface 10. Although not shown in the drawing, the bottom 110 may be formed of a steel pipe wedge and a concrete material on the ground surface 10 to prevent an earthquake or an impact. The foam board 120 may be formed by foaming a synthetic resin to prevent the temperature of the liquid stored in the independent tank 130 from being transmitted to the ground. The bottom 110 and the foam board 120 are described in the following manufacturing method.

The independent tank 130 is formed as a space for storing a liquid (e.g., liquefied natural gas or oil) such as a liquid and a gas. For example, independent tanks 130 may be independent of the sandwich plate 140 to maintain the pressure to trap the internal reservoir (liquefied natural gas) of the independent tank 130 itself, Method. For example, the independent tank 130 has a moss type, and the detailed structure of the independent tank is a general structure, and thus a detailed description thereof will be omitted.

Here, the independent tank 130 may be provided with a pump tower (not shown) for discharging the stored product stored in the independent tank 130. At this time, the independent tank 130 has a closed structure, so that the inner space can be isolated from the outside when the pump tower is not operated. The independent tank 130 may have a polygonal shape, for example, a rectangular parallelepiped shape.

The sandwich plate 140 surrounds the left and right circumferential surfaces of the independent tank 130 so as to form an outer tank. The sandwich plate 140 includes a steel plate 141 and a concrete 143 to form a sandwich shape.

The steel plate 141 is configured to guide the shape of the concrete 143 so that the sandwich plate 140 can form a wall. The steel plate 141 is opposed to each other, and a pair of reinforcements 142 are formed therebetween. For example, the steel plate 141 is made of a plate made of steel, and the reinforcing material 142 is formed of iron, and a plurality of steel plates are disposed across a pair of plates. In addition, the reinforcement 142 can be connected in a welded manner to form a multi-layer between the steel plates 141, and the reinforcement 142 can connect the pair of plates to each other, thereby simplifying the structure, Can be improved. In addition, the reinforcing material 142 can be made to hold the concrete 143 between the steel plates 141 so that the concrete material and the iron, which are different materials, form a single member and can be transported integrally with each other.

The concrete 143 is a filling material to be filled in the steel plate 141. It is generally known that a concrete material is resistant to compression and excellent in heat insulation performance. This concrete 143 is formed between the steel plates 141. Here, the concrete 143 may use a pre-stressed concrete. This is because the expanded core is embedded before the concrete material is hardened, so that the compressive residual stress due to the elongated iron core is produced, so that the shape deformation against the force exerted to the outside (tensile force) is reduced by the compressive residual stress. Here, the iron cores impregnated in the concrete material may be spaced apart from each other along the longitudinal direction of the reinforcing material 142 formed between the steel plates 141.

Such a sandwich plate 140 can be used to form a bottom or independent tank 130 in the process of drying the ground storage tank 100 and to use the sandwich plate 140 assembled or preassembled, Thereby achieving savings.

In addition, the sandwich plate 140 has a high durability, sound insulation and fire resistance as compared to a wall made of a common cement material, so that the external stimulus is transmitted to the liquid stored in the independent tank 130 or the temperature of the liquid is minimized . The sandwich plate 140 is excellent in workability and structural rationality by using both the efficiency of the steel plate 141 and the high rigidity of the concrete material.

Here, when the storage product stored in the independent tank 130 is a liquefied natural gas (LNG), the liquefied natural gas has a risk of explosion when exposed to an impact, and should be kept at a cryogenic temperature. The ground storage tank 100 has a structure in which impact resistance and liquid tightness by the sandwich plate 140 are maintained firmly.

The pearlite 150 is provided between the independent tank 130 and the sandwich plate 140 so as to prevent the temperature of the liquid stored in the independent tank 130 from being transmitted to the outside. The pearlite 150 may be formed by calcining gemstones made of, for example, a volcanic stone at a high temperature (for example, 1200 degrees Celsius).

The outer roof 160 is an outer trough configuration with the sandwich plate 140 and covers the top of the sandwich plate 140. The outer roof 160 is made of, for example, an iron plate, and an installation hole 161 is formed so that the equipment can be installed to pass through. At this time, a pump tower may be passed through the installation hole 161. Such a roof tile 160 is simpler than the structure of the sandwich plate 140, so that the installation of the equipment is easy and the connection structure can be simplified.

The ground storage tank 100 may store and store the liquid on the ground where the liquid may be a resource such as liquefied natural gas or oil and the independent tank 130 and the sandwich plate 140 are each modularized, So that shortening of air and cost reduction can be achieved.

In addition, although it is difficult to construct a general ground storage tank by a construction condition such as an environmental factor (a period in which a ship can enter the vessel to carry construction equipment is limited) in the case of polar regions, So that installation can be facilitated even in the polar regions due to shortening of installation air and air.

A manufacturing method for the ground storage tank 100 will be described below with reference to the drawings.

FIG. 2 is a flow chart of a method for manufacturing a surface-bearing storage tank according to another embodiment of the present invention, and FIG. 3 is a flowchart showing a step of installing a sandwich plate in a method of manufacturing a surface-bearing storage tank according to another embodiment of the present invention. Herein, the same reference numerals are used for the same components having the same functions as those of the aboveground storage tank of the above-described embodiment, and redundant explanations are omitted.

As shown in FIGS. 2 and 3, the method for fabricating a surface-type storage tank according to an embodiment of the present invention includes forming a floor on a floor (S110), installing a foam board A step S130 of providing an independent tank extending upwardly along the peripheral surface of the foam board to form a space S130, a step S140 of installing a sandwich plate to surround the upper and left and right side walls of the independent tank S140, (S150) filling the pearlite between the sandwich plate and the sandwich plate (S150), and installing a roof trough (S160) so that the sandwich plate is closed on the top of the independent tank.

In step S110, a floor 110 is formed on the paper surface 10. This is the foundation for consolidating the ground. For example, the process of forming the bottom 110 may include placing a plurality of iron pipe wedges (also referred to as "piles", not shown) into the ground 10 as supports to prevent seismic or shocks, Can be poured between the iron pipe wedges. At this time, the floor 110 may be toughened so that the upper surface of the floor 110 is flat.

In step S120, a foam board 120 is installed on the floor 110 to form a heat insulation. The foam board 120 can prevent the temperature of the liquid stored in the independent tank 130 from being transmitted to the ground. For example, the foam board 120 may be formed by foaming the synthetic resin in a flat plate shape. Such a foam board 120 may constitute a lattice-shaped frame so as to withstand loads caused by the storage in the independent tank 130.

The foam board 120 may be formed by foaming the synthetic resin after the frame is disposed on the floor 110. Alternatively, the foam board 120 may be pre-formed as a flat-plate structure and then disposed and assembled on top of the floor 110

In step S130, an independent tank 130, which extends upward along the circumferential surface of the foam board 120 and has a space, is installed. Here, for example, the independent tanks 130 are made of a moss type, and the detailed structure of the independent tanks is a general structure, so a detailed description thereof will be omitted. The independent tanks 130 may be manufactured independently and assembled on the foam board 120 have.

Meanwhile, a pump tower (not shown) may be installed in the independent tank 130 so that the stored water in the independent tank 130 can be discharged to the outside. At this time, the pump tower may be formed vertically across the upper portion from the lower portion of the independent tank 130. These pump towers may be installed together in the process of assembling the independent tanks 130, or may be separately installed after the independent tanks 130 are assembled.

In step S140, the sandwich plate 140 is installed so as to surround the left and right side walls of the independent tank 130.

3, the step of forming the steel plate 141 (S141), the step of forming the concrete 143 (S142), the step of forming the steel plate 141, (S143). ≪ / RTI >

In step S141, a steel plate 141 is formed, which is opposed to each other and is formed as a pair, in which a reinforcing material 142 is formed therebetween. For example, the steel plate 141 has a pair of plate shapes facing each other, and a plurality of reinforcing pieces 142 are connected at right angles between the steel plates 141. At this time, the reinforcing material 142 can be formed as a single body by connecting a pair of steel plates together. The steel plate 141 is formed as a part of the outer tank while guiding the shape of the packing (concrete).

In step S142, the concrete 143 is formed between the steel plates 141. [ The concrete 143 is high in durability, sound insulation and fire resistance as compared with a wall made of a general cement material, so that it is possible to minimize an external stimulus being transmitted to the liquid stored in the independent tank 130 or a temperature of the liquid being transmitted to the outside. The concrete 143 is a mixture of various materials (sand, gravel, aggregate, cement, etc.) and kneaded in water. The mixture is injected into the steel plate 141, As shown in FIG. By this step, the sandwich plate 140 is formed.

In step S143, the sandwich plate 140 is assembled to the outside of the inner tank 130. The sandwich plate 140 may be excellent in workability and structural rationality by using both the efficiency of construction of the steel plate 141 and the high rigidity of the concrete 143. The sandwich plate 140 thus formed is transported to the floor 110 using a conveying device such as a crane and the plurality of steel plates 141 provided with the concrete 143 are connected to each other, The sandwich plate 140 is assembled.

In step S150, pearlite 150 is filled between the independent tank 130 and the sandwich plate 140. [ Unlike styrofoam, pearlite 150 has no risk of generating toxic gas in the event of a fire, and can achieve a thermal insulation effect without danger of discharging dangerous substances in air such as glass fiber or asbestos. This pearlite 150 is formed by pouring the kneaded mixture between the independent tank 130 and the sandwich plate 140 after mixing the mixture such as gemstones, liquid sodium silicate and hardener, .

In step S160, the outer tile roof 160 is installed so that the sandwich plate 140 is closed on the upper portion of the independent tank 130. [ The outer roof 160 is formed on the upper part of the independent tank 130 and the outer roof 160 is made of an iron plate and welded to the steel plate 141 of the sandwich plate 140 As shown in FIG.

As described above, according to the present embodiment, since the sandwich plate 140 can be modularized without installing a separate form and a double wall (a structure for forming concrete) and disassembling it, the installation number is shortened, The cost can be reduced, and the installation can be made easy even in the polar regions by shortening the air.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification and the modification are possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: ground 100: ground storage tank
110: floor 120: foam board
130: Independent tank 140: Sandwich plate
141: steel plate 142: reinforcement
143: Concrete 150: Pearlite

Claims (5)

An independent tank in which a space is formed so as to store the stored product to form an inner tank;
A sandwich plate having a pair of steel plates facing each other and formed with a reinforcing material therebetween, and a concrete formed between the steel plates, the sandwich plate surrounding the left and right circumferential surfaces of the independent tank;
A perlite provided between the independent tank and the sandwich plate; And
And an outer roof covering an upper portion of the sandwich plate and forming an outer tank with the sandwich plate. The method according to claim 1,
Further comprising a pump tower installed in the independent tank for discharging the stored material from the bottom surface of the independent tank. 3. The method of claim 2,
Wherein the outer tank roof is provided with an installation hole in which the pump tower is installed. Forming a floor on the ground;
Installing a foam board which is adiabatic on the floor;
Providing an independent tank extending upwardly along a circumferential surface of the foam board and having a space therein;
Providing a sandwich plate to surround left and right side walls of the independent tank;
Filling the pearlite between the independent tank and the sandwich plate; And
And installing an outer tile roof so that the sandwich plate is closed on top of the independent tanks. 5. The method of claim 4,
Wherein the step of installing the sandwich plate comprises:
Forming a pair of steel plates facing each other to form a reinforcing material therebetween;
Forming concrete between the steel plates; And
And assembling the sandwich plate to the outside of the independent tank.

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