METHOD OF LOW TEMPERATURE GAS SEPARATION Russian patent published in 2015 - IPC C10G5/06 F25J3/00 

FIELD: oil and gas industry.

SUBSTANCE: method includes wet gas separation at the first stage with the production of the water and HC condensates, and the first separation stage gas that is subjected to partial condensation due to counterflow cooling of the gas and condensate of the third separation stage with the production of gas and condensate of the second separation stage, as well as heated condensate of the third separation stage and commercial gas. The gas from the second separation stage is mixed up with weathering gas, its flow is restricted and separated with the production of the gas and condensate of the third separation stage, which are delivered as cooling agents to partial condensation of the gas from the first separation stage, at that the condensate of the third separation stage is delivered by a pump. The heated condensate of the third separation stage together with the hydrocarbon condensate of the first separation stage and condensate of the second separation stage are separated at a pressure close to the pressure of the first and second separation stages with the production of weathering gas, unstable condensate and water condensate. If necessary, in the gas line of the first and/or the second separation stage a hydrates inhibitor is injected, and the spent solution of the hydrates inhibitor is drained from the unit.

EFFECT: increased output of commercial gas, improved recovery degree of heavy components, excluding ejection of weathering gas.

2 cl, 1 dwg, 1 ex