KR-20260064774-A - Vacuum insulation tank and insulator filling system thereof

KR20260064774AKR 20260064774 AKR20260064774 AKR 20260064774AKR-20260064774-A

Abstract

The present invention is a vacuum insulation tank comprising: an inner tank in which liquefied gas is stored; an outer tank surrounding the inner tank and spaced apart from the inner tank; and a vacuum insulation layer formed between the inner tank and the outer tank, wherein the interior of the vacuum insulation layer may be filled with a bead-shaped open-cell polymer insulation material.

Inventors

전규진
배광민
김광현

Assignees

에이치디한국조선해양 주식회사
에이치디현대중공업 주식회사
에이치디현대삼호 주식회사

Dates

Publication Date: 20260508
Application Date: 20241029

Claims (11)

An inner tank in which liquefied gas is stored; An outer tank arranged to surround the inner tank and spaced apart from the inner tank; and It includes a vacuum insulation layer formed between the inner tank and the outer tank, and A vacuum insulation tank in which open-cell polymer insulation in the form of beads is filled inside the vacuum insulation layer.
In claim 1, A vacuum insulation tank in which the vacuum level of the above vacuum insulation layer is maintained in the range of 1 to 30 mTorr.
An inner tank in which liquefied gas is stored; An outer tank arranged to surround the inner tank and spaced apart from the inner tank; and A vacuum insulation tank comprising a vacuum insulation layer formed between the inner tank and the outer tank; An insulation receiving container accommodating an insulation material filled in the above vacuum insulation layer; and The above vacuum insulation layer and the insulation material receiving container are connected to include a connecting pipe through which the insulation material is transported. The above insulation material is an insulation filling system for a vacuum insulation tank, which is an open-cell polymer insulation material in the form of beads.
In claim 3, A vacuum insulation tank insulation material filling system further comprising a pressurizing device that pressurizes the insulation material contained in the insulation material receiving container and transfers it to the vacuum insulation layer through the connecting pipe.
In claim 3, A vacuum insulation tank insulation filling system further comprising a purging gas supply unit connected to the insulation receiving container and the connecting pipe, respectively, capable of supplying purging gas to the vacuum insulation layer, the insulation receiving container, and the connecting pipe to perform purging.
In claim 5, The purging gas supply unit. A liquid nitrogen receiving container that contains liquid nitrogen inside; and A insulation filling system for a vacuum insulation tank including a vaporizer that vaporizes the above liquid nitrogen.
In claim 3, A first relief valve capable of controlling the pressure of the vacuum insulation layer; and A vacuum insulation tank insulation filling system further comprising a second relief valve capable of regulating the pressure of the insulation receiving container.
In claim 7, A vacuum insulation tank insulation filling system having a filter, which the insulation material cannot pass through, provided at the front of the first relief valve and the second relief valve, respectively.
In claim 3, An insulation filling system for a vacuum insulation tank, further comprising a pressure reducing pipe connected to the above-mentioned vacuum insulation layer and having a vacuum pump installed therein.
In claim 9, An insulation filling system for a vacuum insulation tank, wherein a filter is provided on the above-mentioned pressure reducing pipe to prevent the insulation from passing through.
In claim 9, The above pressure reducing pipe is, Upper pressure reducing pipe connected to the upper part of the above vacuum insulation layer; Intermediate pressure reducing pipe connected to the intermediate part of the above vacuum insulation layer; and An insulation filling system for a vacuum insulation tank including a lower pressure reducing pipe connected to the lower part of the above vacuum insulation layer.

Description

Vacuum insulation tank and insulator filling system thereof The present invention relates to a vacuum insulation tank and a method for filling the insulation material thereof. Due to the extremely low temperatures of liquefied gas, heat intrusion from the outside of the tank can occur. This causes the liquefied gas stored inside the tank to evaporate, generating Boil-Off Gas (BOG), which leads to reduced storage efficiency and increased internal tank pressure. To solve this problem, conventionally, vacuum insulation tanks were adopted that maintained a vacuum state in the space between the inner tank and the outer tank, while simultaneously providing a vacuum insulation layer filled with glass bubbles or perlite. In addition, there were cases where insulation tanks were adopted in which panel-type insulation was installed in the inner tank and the space between the inner tank and the outer tank was filled with hydrogen. However, since materials such as glass bubbles or perlite are in powder form and consist of very fine particles of 100 μm or less, there was a problem that a long vacuum operation was required to achieve the target vacuum level due to clogging of the vacuum pump filter and obstruction of gas flow during the vacuum formation process. In addition, when installing panel-type insulation, there was a problem that the difficulty of the work of installing it in layers was high. Figure 1 is a drawing showing a vacuum insulation tank of the present invention. Figure 2 is a graph showing the thermal insulation performance according to vacuum pressure for each insulation material. Figure 3 is a table showing the vacuum formation results for each insulation material. Figure 4 is a graph showing the total amount of outgassing over time for each insulation material. Figure 5 is a diagram showing the insulation material filling system of the vacuum insulation tank of the present invention. Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted. In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments of the present invention. These terms are intended merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by these terms. Where it is stated that a component is "connected," "combined," or "joined" to another component, it should be understood that the component may be directly connected or joined to the other component, but that another component may also be "connected," "combined," or "joined" between each component. In this specification, the front-back, left-right, and up-down directions are referred to for convenience of explanation and may be directions orthogonal to one another. However, these directions are determined relatively, and the term "up-down direction" does not necessarily mean a vertical direction. <Vacuum Insulated Tank (100)> Referring to FIG. 1, the vacuum insulation tank (100) of the present invention comprises: an inner tank (110) in which liquefied gas is stored; an outer tank (120) arranged to surround the inner tank (110) and spaced apart from the inner tank; and a vacuum insulation layer (130) formed between the inner tank (110) and the outer tank (120), wherein the interior of the vacuum insulation layer (130) may be filled with a bead-shaped open-cell polymer insulation material (140). Each component will be described in detail below. In a vacuum insulation tank (100), liquefied gas can be stored in the space inside the inner tank (110). For example, liquefied natural gas, liquefied hydrogen, etc. can be stored. When the inner tank (110) is directly exposed to the outside, a problem arises where the amount of heat intrusion from the outside increases. Therefore, an outer tank (120) can be provided that surrounds the outside of the inner tank (110) at a certain distance from the inner tank (110). The vacuum insulation layer (130), which is the space between the inner tank (110) and the outer tank (120), is maintained at a vacuum (including a low vacuum, which is a low pressure close to a vacuum) and is filled with an insulating material (140) to effectively block heat from the outside. As explained in the background technology, when using particulate insulation materials such as glass bubbles, it is difficult to form a vacuum, so there is a construction problem. Therefore, as a new insulation material (140