METHOD OF THE GAS-DYNAMIC SEPARATION Russian patent published in 2007 - IPC B01D45/12 B01D53/26 

FIELD: gas-processing industry; methods and devices of the gas-dynamic separation.

SUBSTANCE: the invention is pertaining to the method of the gas-dynamic separation, for example, to the low-temperature treatment of the multi-component hydrocarbon gases (natural and petroleum), and also for the gas dehydration by separation and condensation from it of the aquatic and (or) hydrocarbon components and may be used in the systems of collection, preparation and reprocessing of the multi-component hydrocarbon gases. The method provides for the swirled feeding of the initial stream of the high-pressure multi-component hydrocarbon gas into the nozzle, the isenthalpic expansion of the gas with cooling at its outflow at the transonic or supersonic speed, condensation of the components in the expanded and cooled rotating gas stream, separating of the condensate from the gas, collection of the condensate in the area with the reduced pressure which is formed by ejection from it of the gas phase, the increase of the compression of the purified gas stream by its stagnation in the diffuser and removal of the purified gas and the condensate. Into the initial gas additionally introduce the condensable hydrocarbon components in the liquid or vapor phases, in the expanded and cooled swirling stream form the near-axial field consisting predominantly of the gas phase, and the peripheral field consisting of the gas-liquid mixture of the condensed and non-condensed components. The latter is withdrawn into the area of the reduced pressure where separation of the gas-liquid mixture is made into the liquid and the gas. The gas is ejected with the purified gas of the near-axial field. At that, the gas-dynamic separation is conducted a single time or many times. The technical result of the invention is the increased efficiency of the separation.

EFFECT: the invention ensures the increased efficiency of the separation.

9 cl, 8 dwg, 9 ex