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US 3,944,824 AGranted
Method and device for sampling gases
AssigneeEntreprise de Recherches et d'Activites Petrolieres Elf
InventorsJean Chagny, Guy Francoise, Daniel Thevenet
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AssigneeEntreprise de Recherches et d'Activites Petrolieres Elf
InventorsJean Chagny, Guy Francoise, Daniel Thevenet
Estimating the term…
In order to analyze gaseous compounds of a mixture which have a mass below a given value, a fraction containing a number of phases is continuously sampled in a loop mounted in parallel with a main circuit under conditions of pressure such that the Reynolds numbers in the main circuit and the sampling loop are equivalent. The mixture is passed through traced pipes, at least one dust remover and at least one heat exchanger in which a heat-transporting fluid is circulated at an adjustable temperature T.sub.1 ; condensed and gaseous fractions of the mixture are collected in a flash drum placed in an enclosure at an adjustable temperature T.sub.2 ; the products of the mixture are then passed to an analytical instrument, their mass being such that they are in gaseous form at the temperature T.sub.2.
A method for continuous sampling of a mixture of a multiphase fluid for the analysis of gaseous compounds of said mixture which have a mass below a given value, comprising the steps of continuously withdrawing a portion of said mixture from a main flow circuit for said mixture, to a sampling circuit under conditions of pressure such that the Reynolds numbers within the main circuit and the sampling circuit are equivalent, removing the dust from said mixture portion, passing said mixture portion in a heat exchange relation with a heat exchange fluid at a predetermined temperature, collecting the condensed and gaseous fractions of the mixture portion in a flash drum at a predetermined temperature and passing to an analytical instrument the products of said mixture portion whose mass is such that said products are present in gaseous form at said latter predetermined temperature.
An apparatus for continuously sampling a mixture of a multiphase fluid for the analysis of gaseous compounds of said mixture which have a mass below a given value, comprising a sampling loop mounted in parallel with the main flow circuit for the mixture to be analyzed and comprising two valves located at the inlet and at the outlet of said sampling loop and a depressurizer downstream of a three-way valve for connecting the sampling loop to a traced pipe when said valve is put into service;
Dependencies are inferred from the claim text.