To provide a heat insulator for a liquified natural gas tank that suppresses cracking, peeling or the like even if remarkable thermal contraction occurs on a steel plate of a liquified natural gas tank, can sufficiently suppress the generation of boil off gas (BOG) and a boil off rate, reduces manufacturing costs, and is excellent in an environment upper surface and a construction property.SOLUTION: A heat insulator 20 is provided on an outer surface of a tank steel plate 121 of a liquified natural gas tank. The heat insulator 20 includes layers 21 and 23 made of a resin foam, and a layer 22 made of a vacuum heat insulator. The heat insulator has a density ingredient decreasing the density of the layer made of the resin foam from the tank steel plate side toward the outside.SELECTED DRAWING: Figure 2
【課題】液化天然ガスタンクの鋼板に顕著な熱収縮が生じた場合でも亀裂や剥離等が抑制され、ボイルオフガス(BOG)の発生およびボイルオフレート(BOR)を十分に抑制でき、製造コストを低減し、環境上面で優れているとともに、施工性にも優れる液化天然ガスタンク用断熱材を提供する。【解決手段】液化天然ガスタンクのタンク鋼板121の外表面に設けられる断熱材20であって、断熱材20は、樹脂発泡体からなる層21、23と真空断熱材からなる層22とを含み、前記断熱材は、前記タンク鋼板側から外側に向かって前記樹脂発泡体からなる層の密度が減少する密度勾配を有する液化天然ガスタンク用断熱材。【選択図】図2
HEAT INSULATOR FOR LIQUIFIED NATURAL GAS TANK, CONSTRUCTING METHOD THEREOF, AND LIQUIFIED NATURAL GAS TANK
液化天然ガスタンク用断熱材およびその施工方法並びに液化天然ガスタンク
2021-04-01
Patent
Elektronische Ressource
Japanisch
IPC: | F17C Behälter zum Aufnehmen oder Speichern verdichteter, verflüssigter oder verfestigter Gase , VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / B65D Behältnisse zur Lagerung oder zum Transport von Gegenständen oder Materialien [Container], z.B. Säcke, Beutel, Fässer, Flaschen, Dosen, Kästen, Büchsen, Schachteln, Packkörbe, Tonnen, Gläser, Flüssigkeitsbehälter, Trichtersilos, Transportbehälter , CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS |
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