Liquid gas vaporization and measurement system and method

Details Liquid gas vaporization and measurement system and method Liquid gas vaporization and measurement system and method

G - Physics

01

N

G01N 1/00 (2006.01) F17C 9/02 (2006.01) G01N 25/02 (2006.01)

Patent

CA 2605119

A liquid gas vaporization and measurement system, and associated method, for efficiently vaporizing a continuous sample of liquid gas, such as liquid natural gas (LNG), and accurately determining the constituent components of the gas. A constant flow of liquid gas sampled from a mass storage device is maintained in a vaporizing device. Within the vaporizing device the liquid gas is flash vaporized within heated narrow tubing. The liquid gas is converted to vapor very quickly as it enters one or more independently operating vaporizer stages within the vaporizing device. The vapor gas is provided to a measuring instrument such as a chromatograph and the individual constituent components and the BTU value of the gas are determined to an accuracy of within +/- 0.5 mole percent and 1 BTU, respectively.

L'invention concerne un système de vaporisation et de mesure de gaz liquide, ainsi qu'un procédé associé, permettant de vaporiser efficacement un échantillon continu de gaz liquide, tel qu'un gaz naturel liquide (GNL), ainsi que de déterminer précisément les éléments constitutifs du gaz. Un flux constant de gaz liquide prélevé d'un dispositif de stockage de grande capacité est maintenu dans un dispositif de vaporisation. Dans le dispositif de vaporisation, le gaz liquide est vaporisé instantanément à l'intérieur d'un tubage étroit chauffé. Le gaz liquide est transformé en vapeur très rapidement lorsqu'il entre dans un ou plusieurs étages vaporisateurs fonctionnant indépendamment à l'intérieur du dispositif de vaporisation. Le gaz vapeur est alimenté vers un instrument de mesure tel qu'un chromatographe et les éléments constitutifs individuels et la valeur de BTU du gaz sont déterminés avec une précision comprise entre +/- 0,5 % en mole et 1 BTU, respectivement.

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