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METHOD OF LIQUEFACTION OF THE STREAM OF THE NATURAL GAS RICH WITH THE HYDROCARBONS WITH THE SIMULTANEOUS EXTRACTION OF C3+ RICH FRACTION WITH THE HIGH YIELD
METHOD OF LIQUEFACTION OF THE STREAM OF THE NATURAL GAS RICH WITH THE HYDROCARBONS WITH THE SIMULTANEOUS EXTRACTION OF C3+ RICH FRACTION WITH THE HIGH YIELD
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机译:高产C 3 + Sub>富馏分同时萃取富集天然气的天然气液化方法
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摘要
FIELD: natural gas industry; other industries; methods of liquefaction of the rich with the hydrocarbons gaseous stream with the simultaneous extraction of С3+-rich fraction.;SUBSTANCE: the invention presents the method of liquefaction of the rich with the hydrocarbons stream, first of all the stream of the natural gas with the simultaneous extraction of С3+ - rich fraction with the high yield at the expense of the heat-exchange of the rich with the hydrocarbons stream at least with three having the different composition mixed cooling agents of the cascade correspondingly consisting of at least three refrigeration cycles. According to the invention the rich with the hydrocarbons stream (1, 1') is exposed to dilation (X) before its division into C2-- the rich fraction and С3+ - the rich fraction. The exposed to dilation the rich with the hydrocarbons stream (2)is fed to the stage of absorption (Т1) of the hydrocarbons C3+ , dividing it at this stage into the fed for liquefaction (Е2, ЕЗ) С2- - rich fraction (3) and into the first condensate fraction (8). The fed for liquefaction C2-- rich fraction (3) is compressed (V) before its liquefaction (Е2, ЕЗ). The first condensate fraction (8) in the heated up (E) state is fed to the stage of the topping (Т2) of the hydrocarbons С2. In the capacity of the vat residue formed at the stage of the topping (Т2) of the hydrocarbons С2, they receive with the high yield the second fraction, С3+ - the rich condensate fraction (11). In the capacity of the head faction formed at the stage of the topping (Т2) of hydrocarbons С2, take out C3- - rich gaseous fraction, which is partially condensed (E), and the received condensate is fed (10) into the stage of absorption (Т1) of the hydrocarbons С3 as the absorbing agent. Usage of the invention will allow to ensure along with the liquefaction of the stream of the natural gas simultaneously to receive together with the rich yield of hydrocarbons С3+ - rich fraction.;EFFECT: the invention ensures along with the liquefaction of the stream of the natural gas simultaneous production of the rich yield of hydrocarbons С3+ - rich fraction.;9 cl, 2 dwg
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