PROCEDURE FOR CALIBRATION OF DEW POINT HYGROMETERS OF NATURAL GASES AND FACILITY FOR ITS IMPLEMENTATION Russian patent published in 2003 - IPC

FIELD: gas industry. SUBSTANCE: procedure includes saturation of stream of initial dry inert gas with vapors of water, supply of diluted wet gas into hygrometer and construction of calibration characteristic. Wet gas is diluted with initial dry inert gas until double value of required concentration is achieved as minimum. Initial dry inert gas is saturated with vapors of alcohol or heavy hydrocarbon, this mixture is diluted with initial dry inert gas to obtain at least double value of required concentration and is directed into stream of wet diluted gas in amount equal to amount of additional stream of initial dry inert gas. Procedure is implemented with the help of facility including hygrometer and intercoupled water saturator and dilution chamber connected by means of rotameters and chokes to source of initial dry inert gas. Facility is fitted with interconnected additional saturator and dilution chamber, is connected to source of initial dry inert gas by means of rotameters and chokes and has unit that mixes diluted streams that includes at least three identical rotameters. EFFECT: increased calibration precision. 2 cl, 2 dwg