Intermittent de-icing during continuous regasification of a cryogenic fluid using ambient air
A low-temperature liquid, ambient air technology, applied in gas processing/storage purposes, gas/liquid distribution and storage, gas processing/storage effects, etc., can solve problems such as the reduction of working efficiency characteristics of atmospheric evaporators
Active Publication Date: 2010-10-13
澳洲澳德赛能源有限公司
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Problems solved by technology
[0017] For reasons as previously stated, there remains a need for a method and apparatus for regasification of cryogenic liquids which can be operated continuously without redundant evaporators and which overcomes or at least improves upon prior art atmospheric evaporation Defects that reduce the operating efficiency characteristics that have existed in the device so far
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[0053] Specific embodiments of methods and apparatus for the regasification of cryogenic liquids to gaseous form using ambient air as the first heat source for vaporization are now described, with particular reference to offshore regasification of liquefied natural gas (“LNG”) on board a liquefied natural gas carrier. Gasification (given as an example only). The invention is equally applicable to the regasification of other cryogenic liquids, as well as to other onshore regasification facilities or to fixed offshore platforms or barges. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In the drawings, it should be understood that like reference numerals denote like elements.
[0054] Thro...
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A process and apparatus for regasifying a cryogenic liquid to gaseous form are described. Heat is transferred from ambient air to the cryogenic liquid across a heat transfer surface by circulating cryogenic liquid or an intermediate fluid through an atmospheric vaporizer, wherein the ambient air and the cryogenic fluid or intermediate fluid are not in direct contact. A layer of ice is allowed to form, in use, on at least that external portion of the heat transfer surface exposed to the atmosphere where the temperature at the heat transfer surface is below the freezing temperature of water. The layer of ice is dislodged intermittently from the vaporizer using a source of heat operatively associated with a control device, the control device arranged to generate a signal when de-icing is required. The source of heat being directed at the interface between the layer of ice and the heat transfer surface.
Description
technical field [0001] The present invention relates to a method and apparatus for regasification of cryogenic liquids into gaseous form, which uses ambient air as the first heat source for gasification and which is capable of continuous operation. The present invention relates particularly, but not exclusively, to a method and apparatus for regasification of LNG to natural gas using ambient air as the first heat source of vaporization. Background technique [0002] Natural gas is the cleanest burning fossil fuel because it produces fewer emissions and pollutants than coal or oil. Natural gas ("NG") is usually transported from one place to another in its liquid state, "liquefied natural gas" ("LNG"). The liquefaction of natural gas makes it more economical to transport because LNG only occupies about 1 / 600th of the volume of the same amount of natural gas in its gaseous state. Transport of LNG from one place to another is most commonly accomplished using double-hulled ocea...
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IPC IPC(8): F17C7/04F17C9/04F17C9/02F17C13/10
CPCF17C2260/016F17C2227/0323F17C2250/0439F17C2205/013F17C2227/0311F17C2270/0105F17C2225/035F17C2265/05F17C2250/0443F17C2201/052F17C2260/032F17C2227/0397F17C2223/0161F17C2265/07F17C2223/033F17C2227/0142F17C2270/0121F17C2227/0332F17C2201/0128F17C2250/072F17C2221/033F17C2227/0304F17C2227/033F17C2227/0393F17C2227/0327F17C7/04F17C2250/032F17C2225/0123F17C9/02F17C9/04F17C13/10
Inventor S·法加
Owner 澳洲澳德赛能源有限公司