KR101259036B1

KR101259036B1 - Floating roof device

Info

Publication number: KR101259036B1
Application number: KR1020100127786A
Authority: KR
Inventors: 유정모; 유영목; 김병우
Original assignee: 삼성중공업 주식회사
Priority date: 2010-12-14
Filing date: 2010-12-14
Publication date: 2013-05-07
Also published as: KR20120066437A

Abstract

Provide floating roof arrangements. Floating roof device according to an embodiment of the present invention is a floating body for floating on the surface of the fluid stored in the tank; And a blocking part installed at an upper portion of the floating body to block contact between the fluid and the gas in the tank.

Description

Floating Roofing Equipment {FLOATING ROOF DEVICE}

The present invention relates to a floating roof arrangement applied to a fluid tank.

In general, the fluid tank refers to storing a large amount of fluid, such as LNG (Liquefied Natural Gas) or oil, and includes a marine tank and a land tank for storing the liquefied natural gas or oil, etc. do.

Since the fluid stored in the land tank is constantly evaporated from the fluid surface due to contact with the atmosphere, the fluid stored in the tank is not evaporated by using a blocking gas such as an inert gas.

However, in a marine tank that stores a large amount of fluid such as liquefied natural gas (Liquefied Natural Gas) or oil, a lot of fluid flows inside the tank by the flow of the vessel, and due to the sloshing phenomenon A free change surface is formed and a mixture of the fluid and the blocking gas may be generated in the tank, so that the actual vapor pressure (TVP) increases due to the phase equilibrium of the fluid and the blocking gas.

Therefore, the above-described method cannot be used in a marine tank in which a lot of internal flow is generated, and there is a problem in that the impact force or moment component acts on the tank and damages the structure due to the sloshing phenomenon generated by the internal flow. .

Embodiments of the present invention to provide a floating roof device that can reduce the actual vapor pressure by reducing the gas-liquid contact area while suppressing the sloshing phenomenon in the fluid storage tank.

According to an aspect of the invention, the blocking unit for blocking the contact of the gas and the liquefied gas stored in the liquefied gas storage tank for the vessel by the flow of the vessel; A floating body installed below the blocking unit, having a hemispherical shape, the inside of which is formed in a hollow shape, and having a plurality of perforations formed on a surface thereof; And a rail portion formed with a groove into which the blocking portion is inserted to move the blocking portion and the floating body vertically in the marine tank, wherein the floating body has a greater density than the blocking portion and the liquefied gas. Floating roofing devices may be provided that are made of a material having a smaller density.

The blocking portion may be arcuate.

delete

The blocking unit may be sized to cover the fluid stored in the tank.

The roofing device can be made of a material that can withstand cryogenic temperatures and has flexibility.

delete

Embodiments of the present invention can be provided with a floating roof device inside the tank for storing fluid to reduce the gas-liquid contact area while preventing the sloshing phenomenon in the tank to prevent the actual vapor pressure rises.

1 is a view showing a floating roof device according to an embodiment of the present invention.
FIG. 2A is a view showing a floating roof device shown in FIG. 1 installed in a tank.
Figure 2b is a view showing a rail unit installed in the tank so that the floating roof device shown in Figure 1 can be moved in the tank.
3 is a view showing a simulation with and without a floating roof device according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above objects, features and advantages will become more apparent through the following examples in conjunction with the accompanying drawings. Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

Floating roof device according to an embodiment of the present invention is to prevent the actual vapor pressure is increased by reducing the gas-liquid contact area while suppressing the sloshing phenomenon in the fluid storage tank used in ships or onshore.

1 is a view showing a floating roof device according to an embodiment of the present invention, Figure 2a is a view showing a form in which the floating roof device shown in Figure 1 is installed in the tank.

As shown in Figure 1 and 2a, the floating roof device 100 according to an embodiment of the present invention includes a hemispherical floating body 110 and the blocking portion 120.

The hemispherical float 110 is suspended by a sloshing phenomenon generated in the tank 200 during operation of the ship by floating on the surface of the fluid stored in the tank 200 (see FIG. 2A) of the ship. Impact force or moment component acts on the 200 to serve to suppress the damage to the structure of the tank (200).

The inside of the floating body 110 is formed in a hollow form by forming a plurality of perforations 111 on the surface of the floating body 110, the flow of fluid stored in the tank 200 is perforated 111 As it flows in and out through), it is possible to further suppress the sloshing phenomenon in the tank 200.

The blocking unit 120 is installed and coupled to the upper portion of the floating body 110 to block the contact between the fluid stored in the tank 200 and the gas on the fluid surface, which is the floating body 110 And block the contact area of the fluid-gas while reducing the impact pressure of the sloshing to prevent the true vapor pressure (TVP) of the fluid stored in the tank 200 to rise.

To this end, the blocking part 120 is formed of an arcuate plate as shown in FIGS. 1 and 2A, and effectively prevents fluid and gas from contacting the inside of the tank 200. It is desirable to be sized to fully cover the stored fluid. That is, when the blocking part 120 is configured to have a size substantially equal to or slightly smaller than the horizontal size (dimension) of the inside of the tank 200, it is possible to effectively block the contact between the fluid and gas stored in the tank 200. have.

2B is a view showing a rail unit installed in the tank so that the floating roof device shown in FIG. 1 can be moved in the tank. The floating body 110 in the roof device 100 is provided for convenience of understanding and explanation of the present invention. ) Is omitted.

As shown in FIG. 2B, the roof device 100, specifically, the blocking part 120, has the tank 200 to effectively block the contact between the fluid and the gas in the tank 200 as described above. It is made of a size substantially equal to the horizontal size of the inside, wherein the blocking portion 120 may be configured to be smoothly movable in the vertical direction in the tank 200 according to the amount of fluid stored in the tank 200. .

In addition, the tank 200 may be configured in various forms such as a circle or a square, and the blocking unit 120 may be formed in a shape corresponding to the shape of the tank 200. 2B illustrates an example in which the tank 200 has a quadrangular shape, and thus the blocking unit 120 has a quadrangular shape.

As such, the tank 200 is configured in a quadrangular shape, and thus the blocking part 120 is formed in a quadrangular shape. For example, referring to FIG. 2B, the blocking part 120 in the tank 200 may be formed. Referring to the operation relationship, the rail portion 210 in which the groove 220 is dug is formed in at least one pair of opposite edges in the tank 200, and the blocking portion is formed in the groove 220 of the rail portion 210. With the 120 inserted, the blocking portion 120 is vertically in the tank 200 according to the amount of fluid stored in the tank 200 along the groove 220 of the rail portion 210. It is configured to be movable in the direction. In FIG. 2B, the rail unit 210 is exemplarily illustrated at one corner of the tank 200. However, the rail unit 210 has a pair of opposite edges or the tank in the tank 200 as described above. All four corners in the 200 may be installed. In addition, this is merely an example of the case in which the tank 200 is configured in a quadrangular form as described above, but other examples may be applied to the tank 200 other than the quadrangular form.

Although the blocking part 120 has been described as forming the rail part 210 in the tank 200 so as to be movable in the vertical direction in the tank 200, the present invention is not limited thereto, and the blocking part 120 is moved. If you can, other configurations may apply.

As described above, by forming the blocking part 120 as an upwardly convex arcuate plate, resistance to impact pressure due to a sloshing phenomenon in the tank 200 may be increased rather than a flat shape.

In addition, when the blocking portion 120 is made of a material having a density less than the floating body 110, when the external force of a large force according to the flow of the fluid in the tank 200 acts on the roof device 100 When the sloshing phenomenon occurs, it is possible to prevent the upper and lower parts of the roof device 100 to be inverted. Similarly, by configuring the floating body 110 with a material having a density less than the fluid stored in the tank 200, the roof device 100 can be made to float on the surface of the fluid stored in the tank 200.

In addition, the roof device 100 may have the same durability as at room temperature even at cryogenic temperatures to prevent breakage due to cryogenic temperatures, and may collide with the inner wall of the tank 200 by the flow of fluid in the tank 200. In this case, to prevent damage to the inside of the tank 200, it is made of a material having elasticity and flexibility, for example, poly tetra fluoro ethylene (PTFE) or polyacrylate (polyacrilate). desirable.

3 is a view showing a simulation when the floating roof device according to an embodiment of the present invention is installed or not, (a) is a case where the roof device according to the present embodiment is not installed in the tank 200; , (b) is a case where the roof device according to the present embodiment is installed in the tank 200. As shown in (a) of FIG. 3, when the roof device according to the present embodiment is not installed, it can be seen that the fluid 10 stored in the tank 200 is severely flown. As shown, when the roof device according to the present embodiment is installed, it can be seen that the fluid 10 stored in the tank 200 hardly flows.

Therefore, the floating roof device according to the present embodiment prevents the actual vapor pressure of the fluid from rising by blocking the contact area between the fluid and the gas while suppressing the sloshing phenomenon caused by the flow of the fluid in the tank 200. can do.

So far, the floating roof apparatus according to an embodiment of the present invention has been described with reference to FIGS. 1 to 3. However, this is only one embodiment for the purpose of understanding and convenience of the present invention, and the present invention is not limited thereto.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Will be clear to those who have knowledge of.

100: roof 110: floating body
111: perforation part 120: blocking part
200: tank 210: rail portion

Claims

Blocking unit for blocking the contact of the liquefied gas and gas stored in the liquefied gas storage tank for the vessel by the flow of the vessel;
A floating body installed below the blocking unit, having a hemispherical shape, the inside of which is formed in a hollow shape, and having a plurality of perforations formed on a surface thereof; And
And a rail portion formed with a groove into which the blocking portion is inserted to move the blocking portion and the floating body in a vertical direction in the marine tank.
The floating body is a floating roof device made of a material having a density greater than the blocking portion and less than the liquefied gas.

delete

The method of claim 1,
The blocking portion is characterized in that the arch shape
Floating roofs.

The method of claim 1,
The blocking unit may be sized to cover the fluid stored in the tank.
Floating roofs.

delete

The method of claim 1,
The roof device is made of a material that can withstand cryogenic temperatures and has flexibility
Floating roofs.