Abstract:
Thermal insulation material is affixed to the outer surface of the inner sidewall of a double walled storage tank but spaced from the outer sidewall to form a gaseous space therebetween and a blackish wall on the radially outer face of said insulating material faces said tank outer sidewall.
Abstract:
A storage tank for a low-temperature liquid comprising a tank shell, a heat insulation layer with which the tank shell is lined, a liquid-impervious layer sandwiching the heat insulation layer between itself and the tank shell and serving as a first barrier, a second barrier provided inside the heat insulation layer, and a lamination extended along the inner side of the second barrier and including a capacitor layer which in turn consists of at least two electrically conductive layers and an electrical insulation layer interposed therebetween, said electrically conductive layer provided inwardly of the electrical insulation layer being formed with a multiplicity of fluid passages, so that any leakage of the low-temperature liquid through the lining is detected from a change in the capacity meter reading of the capacitor layer with the penetration of the leaking liquid into the electrical insulation layer by way of the fluid passages.
Abstract:
This disclosure teaches a method of vaporizing a sensitive liquid such as liquified natural gas. The liquid to be vaporized is passed through a heat exchanger in noncontact heat exchange relationship with a heat transfer medium. The medium is heated in a tower flowing downwardly through trays or packing in direct contact with upflowing hot combustion gases. The combustion gases preferably are generated in a combustor spaced from the tower.
Abstract:
A ship having a free-standing or self-supporting tank for transporting a cryogenic liquefied gas, the tank comprising an enclosed metal shell which is circular in horizontal section and which has a cylindrical or conical upwardly projecting lower walled portion joined at its bottom edge to the ship hold bottom, a metal secondary bottom in the tank spaced above the ship hold bottom and extending to the cylindrical or conical lower walled portion, a circular weld supporting the secondary bottom in position above the ship hold bottom, insulation between the secondary bottom and the ship hold bottom, a metal primary bottom in the tank spaced above the secondary bottom and extending to the cylindrical or conical lower walled portion and a circular weld which serves to support the metal primary bottom in position above the secondary bottom.
Abstract:
A wall construction for fluid handling devices, especially fluid storage tanks, which is adapted for expansion and contraction, has a moistureproof expansion joint which does not materially weaken the wall construction. The expansion joint includes a slit in a portion of the wall and a shaped expansion member of substantially rigid material overlaying the slit. The member is integrally bonded to the wall on opposite sides of the slit and is shaped to allow for movement of the wall. The expansion joint is particularly suited for insulated tanks having a sandwich construction comprising reinforced plastic layers separated by a layer of polyurethane foam. The expansion member is preferably of glass fiber reinforced plastic.
Abstract:
This holder and transporter is for one or more tanks of the type containing oxygen and acetylene gases. Basically, it comprises a base, a handle and means connecting them, the latter serving to receive and secure at least one tank to the assembly. More specifically, the base is of channel shape to provide rigidity, the tank receiving means being a split band to encircle the tank and provide separated ends which are perforated to receive a fastener used in clamping the band to the tank, one of the ends having a handle formed thereon. The handle is offset relative to the band to provide a selected balance between the handle and the tank. If desired, the base may be shaped to give increased strength to light-weight material and provide spaced supporting surface engaging portions which make the holder stable on uneven surfaces. The holder may be adapted for use on a plurality of tanks.
Abstract:
An enclosed cryogenic storage tank having an insulated bottom, a vertical insulated wall projecting upwardly from the bottom, an insulated roof projecting to the wall and completely covering the space surrounded by the wall, and an insulated deck inside and extending across the tank at a fixed location between the tank bottom and tank roof. A process of removing a subcooled liquefied gas from the space beneath an insulated deck in an insulated cryogenic storage tank, feeding the removed subcooled liquefied gas in heat exchange with a stream of warm liquefied gas of the same composition as the subcooled liquefied gas to cool the warm stream, returning the subcooled liquefied gas to the tank below the deck, and feeding the cooled stream of liquefied gas to the tank above the deck. Alternatively, a stream of the subcooled liquefied gas can be mixed with the steam of warm liquefied gas and the combined stream then fed to the tank above the insulated deck.
Abstract:
An apparatus is provided for holding fluid material distinguished by being balanced in such a way that when placed on a horizontal surface its position will change depending upon whether the fluid contents exceed or fall below a pre-selected minimum.
Abstract:
A structural light-weight panel of high strength, having thermal insulation properties that render the panel particularly suitable for cryogenic and elevated temperature applications. The panel is constituted by a composite core bonded to a carrier membrane or laminated to facing skins, the core including at least one layer formed by a series of balsa beams in spaced relation, the spacing between the beams being filled with slabs of an insulating material such as rigid foam plastic material whose k-factor is similar to that of balsa, whereby the overall thermal insulating characteristics of the composite core are effectively equivalent to that of a homogeneous core composed entirely of foam plastic material, whereas the structural characteristics of the composite core are far superior thereto. The panels are useable as liners for structural enclosures for the storage of fluids at cryogenic to high temperatures.
Abstract:
A method of gasifying a liquid by feeding the hot products of combustion of a combustible material into intimate direct contact with a stream of the liquid at a rate to provide sufficient heat content to gasify the liquid stream and form a stream of the liquid in gaseous or vapor form diluted by the said products of combustion. The method is useful in gasifying substances which are liquid at ambient temperatures and pressures and liquefied gases. The liquid can be combustible or noncombustible. The method is specifically useful for gasifying liquefied natural gas by burning natural gas to form the hot combustion products. Apparatus for gasifying a liquid comprising a burner for burning a combustible material with air, oxygen or oxygen-enriched air to form hot combustion products, a gasifying chamber for gasifying a liquid, an inlet conduit for directly feeding the hot combustion products from the burner to the gasifying chamber, an inlet conduit for feeding a stream of liquid to be gasified to the gasifying chamber, and an outlet conduit leading from the gasifying chamber for delivering an admixture of the gasified liquid and the combustion products to a gas outlet.