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, at that main absorbers are used for drying of the main flow rate of gas and auxiliary absorbers are used for drying of regeneration gas. Gas after regeneration of the main absorbers is directed to the primary gas cooler in order to cool it down and to eliminate primary condensate, thereafter it is delivered to the compressor input, where its pressure is increased, then gas is directed to the receiver where gas pressure is decreased and then gas is delivered to one of the auxiliary absorbers for final drying, thereafter gas is sent to the input of drying unit. At that, with absorbent moisturising in one of the auxiliary absorbers, in parallel to the process of the main absorber regeneration, regeneration of the auxiliary absorber takes place; to this end part of the dried regeneration gas is directed to the second auxiliary absorber operated in regeneration mode and then to the atmosphere. The gas drying unit contains an input pipeline, two absorbers with pipelines, valves with control system, a choke, a compressor, a receiver and a regeneration unit containing auxiliary absorbers, at that outlet pipelines of the main absorbers are connected to the heat exchanger for the purpose of gas primary cooling, the compressor and receiver.

EFFECT: invention allows effective drying of gas and elimination of gas emissions to the atmosphere.

6 cl, 3 dwg