FIELD: chemistry.
SUBSTANCE: method comprises the following steps: selecting a recycle stream in the upper stream exiting the separation column; establishing a certain heat exchange interaction between the recycle stream and at least one portion of the overhead stream exiting the separation column; repeated administration, after expansion, of the cooled and expanded recycle stream into the isolation column; selecting, in the bottom of the column, the separation of at least one reboiling bottoms stream and providing heat exchange between the re-boiling stream and at least one portion of the feed natural gas and/or with the recycle stream. The re-boiling of the bottom liquid is provided by calories absorbed from the original natural gas stream and/or the recycle stream. The invention also relates to a device.
EFFECT: invention allows to reduce power consumption.
15 cl, 6 dwg, 9 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| GAS LIQUEFACTION METHOD WITH FRACTIONATING AT HIGH PRESSURE | 2008 |
|
RU2495342C2 |
| METHOD FOR INCREASING OUTPUT OF ETHYLENE AND PROPYLENE IN PROPYLENE PRODUCTION PLANT | 2015 |
|
RU2701018C2 |
| METHODS FOR SEPARATING HYDROCARBON GASES | 2014 |
|
RU2658010C2 |
| PRODUCTION OF PROPYLENE IN PROCESS OF PARAPHASE CRACKING OF CARBOHYDRATES, IN PARTICULAR ETHANE | 2004 |
|
RU2383522C2 |
| METHOD OF SEPARATION OF GASES AND DEVICE FOR ITS REALIZATION | 1989 |
|
RU2099654C1 |
| METHOD AND SYSTEM FOR PRODUCTION OF LEAN METHANE-CONTAINING GAS FLOW | 2016 |
|
RU2731351C2 |
| METHOD AND DEVICE FOR GAS SEPARATION | 1989 |
|
RU2047061C1 |
| COMPLEX METHOD FOR EXTRACTION OF GAS-CONDENSATE LIQUIDS AND LIQUEFACTION OF NATURAL GAS | 2013 |
|
RU2641778C2 |
| PROCESS FOR RECOVERING HEAT FROM HYDROCARBON SEPARATION | 2014 |
|
RU2674035C2 |
| METHOD AND APPARATUS OF ETHANE EXTRACTION AND TRAPPING | 1989 |
|
RU2040293C1 |
