GAS DRYING METHOD AND GAS DRYING UNIT FOR ITS IMPLEMENTATION Russian patent published in 2014 - IPC B01D53/04 B01D53/26 C10L3/10 

FIELD: oil and gas industry.

SUBSTANCE: gas drying method lies in alternated passage of the dried gas through absorbers, one of them is used in drying mode while the second one - in regeneration mode, with sampling and heating of a part of the dried gas for absorbent regeneration, at that gas after absorbers regeneration is directed to the primary gas cooler in order to cool it down and to eliminate primary condensate; thereafter it is directed to the freezing chamber for further decrease of temperature and receipt of secondary condensate; then dried and cooled gas is supplied to the compressor input where its pressure is increased up to the value not less than input pressure of the dried gas, then gas is sent to the receiver and to input of the drying unit. The gas drying unit contains an input pipeline, two absorbers with inlet and outlet pipelines connected in series with a heat exchanger for the purpose of gas primary cooling, a freezing chamber, a condensate sampler, a compressor and receiver, valves with control system ensuring switching of absorbers from drying mode to regeneration mode, and choke with pipeline feeding the dried gas to the regenerated absorber.

EFFECT: invention ensures effective gas drying by means of a gas drying unit with closed regeneration circle and allows exclusion of gas emissions to the atmosphere.

6 cl, 2 dwg