KR20220122812A - Insulation structure of liquefied gas storage tank - Google Patents

Insulation structure of liquefied gas storage tank Download PDF

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Publication number
KR20220122812A
KR20220122812A KR1020210025407A KR20210025407A KR20220122812A KR 20220122812 A KR20220122812 A KR 20220122812A KR 1020210025407 A KR1020210025407 A KR 1020210025407A KR 20210025407 A KR20210025407 A KR 20210025407A KR 20220122812 A KR20220122812 A KR 20220122812A
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South Korea
Prior art keywords
storage tank
insulation layer
reinforcing
layer
liquefied gas
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KR1020210025407A
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Korean (ko)
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송대성
정왕조
박동희
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삼성중공업 주식회사
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Priority to KR1020210025407A priority Critical patent/KR20220122812A/en
Publication of KR20220122812A publication Critical patent/KR20220122812A/en

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    • 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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/001—Thermal insulation specially adapted for cryogenic vessels
    • 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
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/052—Size large (>1000 m3)
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/01—Reinforcing or suspension means
    • F17C2203/011—Reinforcing means
    • F17C2203/012—Reinforcing means on or in the wall, e.g. ribs
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0329—Foam
    • F17C2203/0333—Polyurethane
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0345—Fibres
    • F17C2203/035—Glass wool
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0614—Single wall
    • F17C2203/0621—Single wall with three layers
    • 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
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F17C2209/225—Spraying
    • 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
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/23—Manufacturing of particular parts or at special locations
    • F17C2209/232—Manufacturing of particular parts or at special locations of 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, e.g. LPG, GPL
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

Disclosed is an insulation structure of a liquefied gas storage tank that prevents defects and diffusion of insulation layers surrounding the storage tank and ensures effective insulation. According to an embodiment of the present invention, an insulation structure of a liquefied gas storage tank comprises: a reinforcing insulation layer having a width set based on a boundary surface of a support block supporting a lower portion of a storage tank for storing cryogenic fluid and constructed along the support block to surround the storage tank; a joint filler covered by the reinforcing insulation layer and provided on a lower outer surface of the storage tank; and a crack prevention layer disposed in the transverse direction inside the reinforcing insulation layer.

Description

액화가스 저장탱크의 단열구조{INSULATION STRUCTURE OF LIQUEFIED GAS STORAGE TANK}Insulation structure of liquefied gas storage tank {INSULATION STRUCTURE OF LIQUEFIED GAS STORAGE TANK}

본 발명은 액화가스 저장탱크의 단열구조에 관한 것이다.The present invention relates to a thermal insulation structure of a liquefied gas storage tank.

액화천연가스(LNG, Liquefied Natural Gas) 및 액화석유가스(LPG, Liquefied Petroleum Gas)와 같은 액화가스는 각각 대략 -160℃, -45℃의 극저온상태로 액화가스 저장탱크 내에 저장된다.Liquefied gas such as liquefied natural gas (LNG, Liquefied Natural Gas) and liquefied petroleum gas (LPG, Liquefied Petroleum Gas) is stored in a liquefied gas storage tank at a cryogenic temperature of approximately -160°C and -45°C, respectively.

도 1은 종래 C 타입의 액화가스 저장탱크의 단열구조를 나타낸다.1 shows the insulation structure of the conventional C-type liquefied gas storage tank.

도 1을 참조하면, 액화가스 저장탱크의 단열구조는 가로로 눕혀진 원통형의 저장탱크(10)의 외부 둘레를 감싸는 단열층(20)과, 저장탱크(10)의 앞부분과 뒷부분의 하부에 각각 부착되는 지지블록(30)을 포함한다. 이때, 지지블록(30) 하부에 마련된 새들(40, Saddle)에 의해 저장탱크(10)의 하중이 지탱된다.1, the insulating structure of the liquefied gas storage tank is attached to the lower portion of the insulating layer 20 surrounding the outer periphery of the horizontally laid cylindrical storage tank 10, the front part and the rear part of the storage tank 10, respectively. It includes a support block 30 to be. At this time, the load of the storage tank 10 is supported by the saddles 40 provided under the support block 30 .

단열층(20)은 스프레이 폼(Spray Foam) 재질로 마련될 수 있으며, 지지블록(30)은 우드(Wood) 재질로 마련될 수 있다. 또, 새들(40)는 스틸(Steel) 재질로 마련될 수 있다. The heat insulating layer 20 may be made of a spray foam material, and the support block 30 may be made of a wood material. Also, the saddle 40 may be made of a steel material.

단열층(20)과 지지블록(30) 간 접촉부위 및 지지블록(30)과 새들(40) 간 접촉부위는 접착제에 의해 접착될 수 있다.A contact portion between the heat insulating layer 20 and the support block 30 and a contact portion between the support block 30 and the saddle 40 may be adhered by an adhesive.

한편, 저장탱크(10)에 LNG와 같은 극저온 물질이 채워지는 경우, 상온(대략 20℃)에서 극저온(대략 -160℃)으로 온도가 급격히 변화되고, 이에 따라 저장탱크(10) 및 단열층(20)에 냉각 수축이 발생한다. On the other hand, when the storage tank 10 is filled with a cryogenic material such as LNG, the temperature is rapidly changed from room temperature (about 20 ℃) to cryogenic temperature (about -160 ℃), and accordingly, the storage tank 10 and the heat insulation layer 20 ), cooling shrinkage occurs.

이때, 서로 재질이 다른 단열층(20)과 지지블록(30) 간의 수축량 차이로 인해 단열층(20)과 지지블록(30) 간 접하는 경계면에 인장 및 전단 응력이 발생한다. 이러한 인장 응력 및 전단 응력이 단열층(20)의 허용 응력을 초과하면, 단열층(20)과 지지블록(30)의 종방향 경계면(50)에 갭이 발생하여 대기에 노출되게 되고, 그로 인해 아이싱(Icing)을 비롯한 각종 결함이 발생할 수 있다.At this time, due to the difference in the amount of shrinkage between the heat insulating layer 20 and the support block 30 having different materials, tensile and shear stress are generated at the interface between the heat insulating layer 20 and the support block 30 . When these tensile stress and shear stress exceed the allowable stress of the heat insulating layer 20, a gap is generated in the longitudinal interface 50 of the heat insulating layer 20 and the support block 30, and is exposed to the atmosphere, thereby causing icing ( Various defects including icing may occur.

또한, 단열층(20)에 파단이 발생하여 두께, 원주 또는 길이 방향의 크랙이 발생할 수 있다. 연속 시공되는 단열층(20)의 특성 상, 이러한 크랙은 주변으로 확대될 수 있으며, 이는 구조적 불안전성과 함께 단열 성능을 떨어뜨릴 수 있다.In addition, cracks may occur in the heat insulating layer 20 to generate cracks in the thickness, circumference, or length direction. Due to the characteristics of the insulating layer 20 continuously constructed, such cracks may expand to the periphery, which may decrease thermal insulation performance along with structural instability.

본 발명의 실시 예는 저장탱크를 둘러싼 단열층의 결함 및 이의 확산을 방지하고 효과적인 단열이 이루어지도록 하는 액화가스 저장탱크의 단열구조를 제공하고자 한다. An embodiment of the present invention is to provide a thermal insulation structure of a liquefied gas storage tank to prevent defects and diffusion of the thermal insulation layer surrounding the storage tank and to achieve effective thermal insulation.

본 발명의 일 측면에 따르면 극저온 유체를 저장하는 저장탱크의 하부를 지지하는 지지블록의 경계면을 기준으로 설정된 너비를 가지며, 상기 지지블록을 따라 시공되어 상기 저장탱크를 둘러싸는 보강단열층; 상기 보강단열층에 의해 커버되며, 상기 저장탱크의 하부 외면에 마련된 조인트필러; 및 상기 보강단열층 내측에 횡방향으로 배치된 크랙방지층;을 포함하는 액화가스 저장탱크의 단열구조가 제공될 수 있다.According to an aspect of the present invention, a reinforcing insulation layer having a width set based on the boundary surface of the support block supporting the lower portion of the storage tank for storing the cryogenic fluid, and constructed along the support block to surround the storage tank; a joint filler covered by the reinforcing insulation layer and provided on the lower outer surface of the storage tank; and a crack prevention layer disposed in the transverse direction inside the reinforcing insulating layer.

상기 보강단열층은 제1보강단열층, 제2보강단열층 및 제3보강단열층이 순차적으로 단속 시공된 형태이고, 상기 크랙방지층은 상기 제1보강단열층과 제2보강단열층 사이에 배치된 제1크랙방지층과, 상기 제2보강단열층과 제3보강단열층 사이에 배치된 제2크랙방지층을 포함할 수 있다.The reinforcing insulation layer is a form in which a first reinforcing insulation layer, a second reinforcing insulation layer, and a third reinforcing insulation layer are sequentially intermittently constructed, and the crack prevention layer includes a first crack prevention layer disposed between the first reinforcing insulation layer and the second reinforcing insulation layer; , It may include a second crack prevention layer disposed between the second reinforcing insulation layer and the third reinforcing insulation layer.

상기 제3보강단열층 후면에 적층되어, 상기 제3보강단열층의 표면 및 수분 유입을 방지하는 보호층을 더 포함할 수 있다.It may further include a protective layer laminated on the rear surface of the third reinforcing heat insulating layer to prevent ingress of moisture and the surface of the third reinforcing heat insulating layer.

상기 조인트필러는 격자 형상으로 마련될 수 있다.The joint filler may be provided in a grid shape.

상기 조인트필러는 글라스 울을 포함할 수 있다.The joint filler may include glass wool.

본 발명의 실시 예에 의한 액화가스 저장탱크의 단열구조는 저장탱크를 둘러싼 단열층의 결함 및 이의 확산을 방지하고 효과적인 단열이 이루어지도록 할 수 있다.The thermal insulation structure of the liquefied gas storage tank according to an embodiment of the present invention can prevent defects of the thermal insulation layer surrounding the storage tank and its diffusion and achieve effective thermal insulation.

본 발명의 효과들은 이상에서 언급한 효과들로 제한되지 않으며, 언급되지 않은 또 다른 효과들은 청구범위의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

도 1은 종래의 액화가스 저장탱크의 단열구조를 도시한 것이다.
도 2는 본 발명의 실시 예에 따른 단열구조가 적용된 액화가스 저장탱크를 나타낸다.
도 3은 도 2에 도시된 단열구조 중 일부위(A)를 확대하여 나타낸 것이다.
도 4는 도 3에 도시된 단열구조에 포함된 조인트필러의 설치 형상의 예를 나타낸 것이다.1 is a view showing a thermal insulation structure of a conventional liquefied gas storage tank.
2 shows a liquefied gas storage tank to which an insulating structure according to an embodiment of the present invention is applied.
3 is an enlarged view of a portion (A) of the insulating structure shown in FIG. 2 .
4 shows an example of the installation shape of the joint filler included in the heat insulating structure shown in FIG.

이하에서는 본 발명의 실시 예를 첨부 도면을 참조하여 상세히 설명한다. 이하의 실시 예는 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 본 발명의 사상을 충분히 전달하기 위해 제시하는 것이다. 본 발명은 여기서 제시한 실시 예만으로 한정되지 않고 다른 형태로 구체화될 수도 있다. 도면은 본 발명을 명확히 하기 위해 설명과 관계 없는 부분의 도시를 생략하고, 이해를 돕기 위해 구성요소의 크기를 다소 과장하여 표현할 수 있다. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following examples are presented in order to sufficiently convey the spirit of the present invention to those of ordinary skill in the art to which the present invention pertains. The present invention is not limited to the embodiments presented herein, and may be embodied in other forms. The drawings may omit the illustration of parts irrelevant to the description in order to clarify the present invention, and may slightly exaggerate the size of the components to help understanding.

도 2는 본 발명의 실시 예에 따른 단열구조가 적용된 액화가스 저장탱크를 나타낸 것이고, 도 3은 도 2에 도시된 단열구조 중 일부위(A)를 확대하여 나타낸 것이다. 그리고, 도 4는 도 3에 도시된 단열구조에 포함된 조인트필러의 형상의 예를 나타낸 것이다. 참고로, 도 2에서 본 발명의 실시 예에 따른 단열구조가 적용된 부위는 구분을 위해 해싱 처리하였다.FIG. 2 shows a liquefied gas storage tank to which an insulating structure according to an embodiment of the present invention is applied, and FIG. 3 is an enlarged view of a portion (A) of the insulating structure shown in FIG. 2 . And, FIG. 4 shows an example of the shape of the joint filler included in the heat insulating structure shown in FIG. For reference, in FIG. 2 , the region to which the thermal insulation structure according to the embodiment of the present invention is applied is hashed for classification.

도 2 내지 도 4를 참조하면, 본 발명의 실시 예에 따른 액화가스 저장탱크의 단열구조는 극저온 유체를 저장하는 저장탱크(101)의 하부를 지지하는 지지블록(103)의 (좌우) 경계면을 기준으로 설정된 너비를 가지며, 지지블록(103)을 따라 시공되어 저장탱크(101)를 둘러싸는 보강단열층(110a~110c)과, 보강단열층(110a~110c)에 의해 커버되며, 저장탱크(101)의 하부 외면에 마련된 조인트필러(115)와, 보강단열층(110a~110c) 내측에 횡방향으로 배치된 크랙방지층(120a,120b)을 포함한다.2 to 4, the insulating structure of the liquefied gas storage tank according to the embodiment of the present invention is the (left and right) boundary surface of the support block 103 supporting the lower portion of the storage tank 101 for storing the cryogenic fluid. It has a width set as a reference and is constructed along the support block 103 and is covered by the reinforcing insulation layers 110a to 110c surrounding the storage tank 101, and the reinforcing insulation layers 110a to 110c, and the storage tank 101 It includes a joint filler 115 provided on the lower outer surface of the, and crack prevention layers 120a and 120b disposed in the transverse direction inside the reinforcing heat insulating layers 110a to 110c.

저장탱크(101)는 예컨대 액화천연가스(LNG)를 저장할 수 있으며, 국제해사기구(IMO, International Maritime Organization)의 압력식 타입 C 탱크일 수 있다.The storage tank 101 may store, for example, liquefied natural gas (LNG), and may be a pressure type C tank of the International Maritime Organization (IMO).

저장탱크(101)의 외면 둘레는 단열층(110)에 의해 커버되며, 단열층(110)은 예컨대 스프레이 폼(Spray Foam)을 포함할 수 있다. The outer circumference of the storage tank 101 is covered by the heat insulating layer 110 , and the heat insulating layer 110 may include, for example, spray foam.

저장탱크(101)의 앞부분과 뒷부분의 하부에는 각각 지지블록(103)이 돌출되게 마련되며, 지지블록(103)은 새들(104)에 의해 지지될 수 있다. 지지블록(103)은 우드(Wood) 재질로 마련될 수 있고, 새들(104)은 스틸(Steel) 재질로 마련되어, 저장탱크(101)의 하중을 지탱한다.A support block 103 is provided to protrude from the lower portions of the front and rear portions of the storage tank 101 , and the support block 103 may be supported by the saddle 104 . The support block 103 may be made of a wood material, and the saddle 104 is made of a steel material to support the load of the storage tank 101 .

지지블록(103)은 원통형의 저장탱크(101) 형태에 맞게 상단부가 곡면형상으로 마련되어 저장탱크(101)에 밀착된 상태에서 접착될 수 있으며, 하단부는 새들(104)과 접착방식으로 결합될 수 있다. The support block 103 is provided with a curved upper end to fit the shape of the cylindrical storage tank 101 and can be adhered to the storage tank 101 in a state of close contact, and the lower end can be bonded to the saddle 104 in an adhesive manner. have.

저장탱크에 LNG와 같은 극저온 물질이 채워지는 경우, 온도가 급격히 변화되고, 저장탱크 및 단열층에 냉각 수축이 발생하게 된다. 이때, 종래에는 서로 재질이 다른 단열층과 지지블록 간의 수축량 차이로 인해 단열층과 지지블록 간의 경계면에 인장 및 전단 응력이 발생하고, 단열층과 지지블록의 종방향 경계면에 갭이 발생할 수 있었다. 또한, 단열층에 크랙이 발생하여 주변으로 전파될 수 있었다.When the storage tank is filled with a cryogenic material such as LNG, the temperature is rapidly changed, and cooling shrinkage occurs in the storage tank and the heat insulating layer. At this time, in the prior art, due to the difference in the amount of shrinkage between the heat insulating layer and the support block of different materials, tensile and shear stress may occur at the interface between the heat insulating layer and the support block, and a gap may occur at the longitudinal interface between the heat insulating layer and the support block. In addition, cracks were generated in the insulating layer and could propagate to the surroundings.

본 발명의 실시 예에서는 이를 방지하기 위해 지지블록(103)의 종방향 경계면과 인접하는 부위의 단열구조를 종래와 차별화되도록 제시한다.In the embodiment of the present invention, in order to prevent this, the insulating structure of the region adjacent to the longitudinal boundary surface of the support block 103 is presented to be differentiated from the prior art.

구체적으로 보강단열층(110a~110c)은 극저온 유체를 저장하는 저장탱크(101)의 하부를 지지하는 지지블록(103)의 경계면을 기준으로 설정된 너비를 가지며, 지지블록(103)을 따라 저장탱크(101)의 하부 외면에 마련된다. 이러한 보강단열층(110a~110c)은 후술할 조인트필러(115)를 커버하도록 시공되되, 저장탱크(101)의 하부(또는 하면)에 단속적으로 시공될 수 있다.Specifically, the reinforcing insulation layers 110a to 110c have a width set based on the boundary surface of the support block 103 supporting the lower portion of the storage tank 101 for storing the cryogenic fluid, and along the support block 103, the storage tank ( 101) is provided on the lower outer surface. The reinforcing insulation layers 110a to 110c are constructed to cover the joint filler 115 to be described later, and may be intermittently installed on the lower portion (or lower surface) of the storage tank 101 .

보강단열층(110a~110c)은 단열층(110)과 동일한 재질로서 스프레이 방식을 통해 시공될 수 있다. 예컨대 폴리우레탄폼(Poly-urethane Foam)을 분사시켜 설정된 높이의 보강단열층(110a~110c)을 시공할 수 있다.The reinforcing heat insulating layers 110a to 110c may be constructed of the same material as the heat insulating layer 110 through a spray method. For example, polyurethane foam (Poly-urethane Foam) may be sprayed to construct the reinforcing insulation layers 110a to 110c of a set height.

종래에는 단열층(110)을 연속 시공하여 저장탱크(101) 외면을 커버하였으나, 본 발명의 실시 예에서는 상술한 크랙 등을 방지하기 위해 지지블록(103)의 경계면을 기준으로 설정된 너비를 갖는 보강단열층(110a~110c)을 단속 시공할 수 있다.Conventionally, the heat insulation layer 110 was continuously constructed to cover the outer surface of the storage tank 101, but in the embodiment of the present invention, a reinforcing insulation layer having a width set based on the boundary surface of the support block 103 in order to prevent the above-mentioned cracks, etc. (110a~110c) can be intermittently constructed.

보강단열층(110a~110c)은 예컨대, 대략 50mm 폭에 한정하여 저장탱크(101)에 단속 시공될 수 있다.The reinforcing insulation layers 110a to 110c may be intermittently installed in the storage tank 101 by, for example, limited to a width of approximately 50 mm.

보강단열층(110a~110c)은 원통형의 저장탱크(101) 하부 주변부를 따라 원형의 곡면 형상으로 형성된 지지블록(103)과 마찬가지로, 지지블록(103)을 따라 동일한 형상으로 마련될 수 있다.The reinforcing insulation layers 110a to 110c may be provided in the same shape along the support block 103 as the support block 103 formed in a circular curved shape along the lower periphery of the cylindrical storage tank 101 .

이때, 보강단열층(110a~110c)은 제1보강단열층(110a), 제2보강단열층(110b) 및 제3보강단열층(110c)이 순차적으로 적층된 형태일 수 있다. In this case, the reinforcing heat insulating layers 110a to 110c may have a form in which the first reinforcing heat insulating layer 110a, the second reinforcing heat insulating layer 110b, and the third reinforcing heat insulating layer 110c are sequentially stacked.

조인트필러(115)는 보강단열층(110a~110c)에 의해 커버되며, 제1보강단열층(110a)이 시공되기 이전에 시공될 수 있다. 조인트필러(115)는 보강단열층(110a~110c)과 마찬가지로, 지지블록(103)의 경계면을 기준으로 설정된 너비를 가지며, 지지블록(103)을 따라 시공되어 저장탱크(101)의 하부 외면을 둘러싸게 된다.The joint filler 115 is covered by the reinforcing insulation layers 110a to 110c, and may be constructed before the first reinforcing insulation layer 110a is constructed. The joint filler 115 has a width set based on the boundary surface of the support block 103, and is constructed along the support block 103, similarly to the reinforcing insulation layers 110a to 110c, and surrounds the lower outer surface of the storage tank 101. get cheaper

조인트필러(115)는 예컨대 격자 형상으로 마련될 수 있으며, 글라스 울(Glass Wool)을 포함할 수 있다.The joint filler 115 may be provided in a lattice shape, for example, and may include glass wool.

조인트필러(115)는 접착제에 의해 저장탱크(101)에 시공될 수 있다. 조인트필러(115) 시공 후, 조인트필러(115)를 커버하도록 상술한 제1보강단열층(110a)이 단속 시공될 수 있다. The joint filler 115 may be installed in the storage tank 101 by an adhesive. After the joint filler 115 is constructed, the above-described first reinforcing and insulating layer 110a may be intermittently applied to cover the joint filler 115 .

이와 같이, 조인트필러(115)를 격자 형상으로 마련하여 설치함으로써, 지지블록(103)과 보강단열층(110a~110c)이 접하는 종방향 경계면에 인장 및 전단 응력이 발생한 경우, 해당 경계면에 갭이 발생하는 것을 방지할 수 있다. 또, 보강단열층(110a~110c)에 크랙 발생 시 크랙이 주변부로 퍼지지 않도록 하여 박리 범위를 제약하는 효과가 있다.In this way, by providing and installing the joint filler 115 in a lattice shape, when tensile and shear stress occurs at the longitudinal interface between the support block 103 and the reinforcing insulation layers 110a to 110c, a gap is generated at the interface. can be prevented from doing In addition, when cracks occur in the reinforcing heat insulating layers 110a to 110c, the cracks do not spread to the periphery, thereby limiting the peeling range.

크랙방지층(120a,120b)은 제1보강단열층(110a)과 제2보강단열층(110b) 사이에 배치된 제1크랙방지층(120a)과, 제2보강단열층(110b)과 제3보강단열층(110c) 사이에 배치된 제2크랙방지층(120b)을 포함할 수 있다.The crack prevention layers 120a and 120b include a first crack prevention layer 120a disposed between the first reinforced thermal insulation layer 110a and the second reinforced thermal insulation layer 110b, a second reinforced thermal insulation layer 110b and a third reinforced thermal insulation layer 110c. ) may include a second crack prevention layer (120b) disposed between.

크랙방지층(120a,120b)은 예컨대 메쉬(Mesh) 타입으로 제작되어 제1보강단열층(110a)과 제2보강단열층(110b) 사이 및 제2보강단열층(110b)과 제3보강단열층(110c) 사이에 배치될 수 있다.The crack prevention layers 120a and 120b are, for example, manufactured in a mesh type, between the first reinforcing heat insulating layer 110a and the second reinforcing heat insulating layer 110b and between the second reinforcing heat insulating layer 110b and the third reinforcing heat insulating layer 110c. can be placed in

또, 크랙방지층(120a,120b)은 극저온에 견딜 수 이는 금속 또는 유리 섬유 소재로 제작될 수 있다.In addition, the crack prevention layers 120a and 120b may be made of a metal or glass fiber material that can withstand cryogenic temperatures.

이러한 크랙방지층(120a,120b)은 보강단열층(110a~110c)의 길이 및 두께 방향의 크랙을 차단할 수 있다.The crack prevention layers 120a and 120b may block cracks in the length and thickness directions of the reinforcing heat insulating layers 110a to 110c.

제3보강단열층(110c) 후면에는 보호층(130)이 적층될 수 있다. 보호층(130)은 제3보강단열층(110c)의 표면 및 수분 유입을 방지한다.A protective layer 130 may be stacked on the rear surface of the third reinforcing insulation layer 110c. The protective layer 130 prevents inflow of moisture and the surface of the third reinforcing heat insulating layer 110c.

이러한 보호층(130)은 저장탱크(101)의 설치 장소 및 대기 노출 유무에 따라 예컨대 GFP(Glass Fiber Plastic) 또는 폴리메릭 코팅(Polymeric Coating) 등을 포함할 수 있다.The protective layer 130 may include, for example, glass fiber plastic (GFP) or polymeric coating, etc. depending on the installation location of the storage tank 101 and whether the storage tank 101 is exposed to the atmosphere.

이하, 본 발명의 실시 예에 따른 액화가스 저장탱크의 단열구조의 시공 과정을 설명한다. Hereinafter, the construction process of the insulation structure of the liquefied gas storage tank according to an embodiment of the present invention will be described.

먼저, 극저온 유체를 저장하는 저장탱크(101)의 하부를 지지하는 지지블록(103)의 종방향 경계면을 기준으로 설정된 너비를 가지며, 지지블록(103)을 따라 저장탱크(101) 하면에 조인트필러(115)를 시공한다. 이때, 접착제를 이용하여 조인트필러(115)를 원주 및 길이 방향으로 설정된 간격에 따라 저장탱크(101)에 시공할 수 있다. 조인트필러(115)는 크랙 전파 범위 최소화를 위해 설정된 간격으로 조밀하게 설치될 수 있다. 또, 시공성 극대화를 고려하여, 대략 1000mm 이내로 조인트필러(115)를 시공할 수 있다.First, it has a width set based on the longitudinal boundary surface of the support block 103 supporting the lower portion of the storage tank 101 for storing the cryogenic fluid, and along the support block 103, a joint filler is formed on the lower surface of the storage tank 101 (115) is constructed. At this time, the joint filler 115 may be installed in the storage tank 101 according to the interval set in the circumferential and longitudinal directions using an adhesive. The joint fillers 115 may be densely installed at intervals set to minimize the crack propagation range. In addition, in consideration of maximizing workability, the joint filler 115 may be constructed within approximately 1000 mm.

다음으로, 조인트필러(115)가 시공된 부위에 제1보강단열층(110a)을 스프레이 방식으로 적층시킨다. 예컨대 폴리우레탄폼을 분사시켜 설정된 높이의 제1보강단열층(110a)을 시공할 수 있다. 이때, 제1보강단열층(110a)은 조인트필러(115)가 시공된 부위를 따라 시공되므로, 조인트필러(115)와 마찬가지로 지지블록(103)의 종방향 경계면을 기준으로 설정된 너비를 가지며, 지지블록(103)을 따라 적층된다.Next, the first reinforcing and insulating layer 110a is laminated on the site where the joint filler 115 is constructed by spraying. For example, it is possible to construct the first reinforcing insulation layer 110a of a set height by spraying polyurethane foam. At this time, since the first reinforcing insulation layer 110a is constructed along the site where the joint filler 115 is constructed, it has a width set based on the longitudinal boundary surface of the support block 103 like the joint filler 115, and the support block It is laminated along (103).

다음으로, 제1보강단열층(110a)의 노출된 부위(후면)에 제1크랙방지층(120a)을 배치시킨다. 제1크랙방지층(120a)은 매쉬 타입으로 제작되어 제1보강단열층(110a) 후면을 덮을 수 있다.Next, the first crack prevention layer 120a is disposed on the exposed portion (rear surface) of the first reinforcing insulation layer 110a. The first crack prevention layer 120a may be manufactured in a mesh type to cover the rear surface of the first reinforcing insulation layer 110a.

다음으로, 제1크랙방지층(120a) 후면에 제2보강단열층(110b)을 적층시킨다.Next, a second reinforcing insulating layer 110b is laminated on the rear surface of the first crack prevention layer 120a.

다음으로, 제2보강단열층(110b) 후면에 제2크랙방지층(120b)을 배치시킨다.Next, a second crack prevention layer 120b is disposed on the rear surface of the second reinforcing heat insulating layer 110b.

다음으로, 제2크랙방지층(120b) 후면에 제3보강단열층(110c)을 적층시킨다. Next, a third reinforcing insulation layer 110c is laminated on the rear surface of the second crack prevention layer 120b.

이와 같이, 상술한 보강단열층(110a~110c)은 각각 스프레이 방식으로 단속 시공될 수 있다. As such, the above-described reinforcing insulation layers 110a to 110c may be intermittently constructed by a spray method, respectively.

다음으로, 제3보강단열층(110c) 후면에 보호층(130)을 적층시킨다. 예컨대 제3보강단열층(110c)의 표면 보호 및 수분 유입 방지를 위해 GFP 또는 폴리메릭 코팅 등을 이용하여 보호층(130)을 형성할 수 있다.Next, a protective layer 130 is laminated on the rear surface of the third reinforcing insulating layer 110c. For example, in order to protect the surface of the third reinforcing heat insulating layer 110c and prevent moisture from entering, the protective layer 130 may be formed using GFP or polymeric coating.

이상에서는 특정의 실시 예에 대하여 도시하고 설명하였다. 그러나, 본 발명은 상기한 실시 예에만 한정되지 않으며, 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 이하의 청구범위에 기재된 발명의 기술적 사상의 요지를 벗어남이 없이 얼마든지 다양하게 변경 실시할 수 있을 것이다.In the above, specific embodiments have been shown and described. However, the present invention is not limited to the above-described embodiments, and those of ordinary skill in the art to which the invention pertains can make various changes without departing from the spirit of the invention described in the claims below. will be able

101: 저장탱크 103: 지지블록
110: 단열층 110a: 제1보강단열층
110b: 제2보강단열층 110c: 제3보강단열층
115: 조인트필러 120a: 제1크랙방지층
120b: 제2크랙방지층 130: 보호층 101: storage tank 103: support block
110: heat insulation layer 110a: first reinforced insulation layer
110b: second reinforcing insulation layer 110c: third reinforcing insulation layer
115: joint filler 120a: first crack prevention layer
120b: second crack prevention layer 130: protective layer

Claims (5)

극저온 유체를 저장하는 저장탱크의 하부를 지지하는 지지블록의 경계면을 기준으로 설정된 너비를 가지며, 상기 지지블록을 따라 시공되어 상기 저장탱크를 둘러싸는 보강단열층;
상기 보강단열층에 의해 커버되며, 상기 저장탱크의 하부 외면에 마련된 조인트필러; 및
상기 보강단열층 내측에 횡방향으로 배치된 크랙방지층;을 포함하는 액화가스 저장탱크의 단열구조.a reinforcing insulation layer having a width set based on the boundary surface of the support block supporting the lower portion of the storage tank for storing the cryogenic fluid, and being constructed along the support block to surround the storage tank;
a joint filler covered by the reinforcing insulation layer and provided on the lower outer surface of the storage tank; and
Insulation structure of a liquefied gas storage tank comprising a; crack prevention layer disposed in the transverse direction inside the reinforcing insulation layer. 제1항에 있어서,
상기 보강단열층은 제1보강단열층, 제2보강단열층 및 제3보강단열층이 순차적으로 단속 시공된 형태이고,
상기 크랙방지층은 상기 제1보강단열층과 제2보강단열층 사이에 배치된 제1크랙방지층과, 상기 제2보강단열층과 제3보강단열층 사이에 배치된 제2크랙방지층을 포함하는 액화가스 저장탱크의 단열구조.The method of claim 1,
The reinforcing insulation layer is a form in which the first reinforcing insulation layer, the second reinforcing insulation layer and the third reinforcing insulation layer are sequentially intermittently constructed,
The crack prevention layer is a liquefied gas storage tank comprising a first crack prevention layer disposed between the first reinforced thermal insulation layer and the second reinforced thermal insulation layer, and a second crack prevention layer arranged between the second reinforced thermal insulation layer and the third reinforced thermal insulation layer. insulation structure. 제2항에 있어서,
상기 제3보강단열층 후면에 적층되어, 상기 제3보강단열층의 표면 및 수분 유입을 방지하는 보호층을 더 포함하는 액화가스 저장탱크의 단열구조.3. The method of claim 2,
The insulation structure of the liquefied gas storage tank further comprising a protective layer laminated on the rear surface of the third reinforcing insulation layer, and preventing the inflow of moisture and the surface of the third reinforcing insulation layer. 제1항에 있어서,
상기 조인트필러는 격자 형상으로 마련된 액화가스 저장탱크의 단열구조.The method of claim 1,
The joint filler is an insulating structure of a liquefied gas storage tank provided in a grid shape. 제1항에 있어서,
상기 조인트필러는 글라스 울을 포함하는 액화가스 저장탱크의 단열구조.The method of claim 1,
The joint filler is an insulating structure of a liquefied gas storage tank comprising glass wool.
KR1020210025407A 2021-02-25 2021-02-25 Insulation structure of liquefied gas storage tank KR20220122812A (en)

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