RU2015115492A - Сжижение обогащенной углеводородами фракции - Google Patents

Сжижение обогащенной углеводородами фракции Download PDF

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RU2015115492A
RU2015115492A RU2015115492A RU2015115492A RU2015115492A RU 2015115492 A RU2015115492 A RU 2015115492A RU 2015115492 A RU2015115492 A RU 2015115492A RU 2015115492 A RU2015115492 A RU 2015115492A RU 2015115492 A RU2015115492 A RU 2015115492A
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hydrocarbon
heat exchanger
liquefied
rich fraction
supercooled
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RU2015115492A
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RU2698862C2 (ru
RU2015115492A3 (ru
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Хайнц БАУЭР
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Линде Акциенгезелльшафт
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Abstract

1. Способ сжижения и переохлаждения богатой углеводородами фракции, в частности природного газа, согласно которому при охлаждении фракцию подвергают частичной конденсации для удаления тяжелых углеводородов, в частности бензола, отличающийся этапами, на которых:a) сжиженную богатую углеводородами фракцию (7) переохлаждают в отдельном теплообменнике (E3) (нормальный режим),b) прерывают подачу сжиженной богатой углеводородами фракции (7) в теплообменник (E3) не позднее, чем достигается заданный уровень отложения твердого осадка в теплообменнике (E3) (режим очистки),c) плавят твердый осадок в теплообменнике (E3) размораживающим газом (10, 11) и извлекают из теплообменника (E3) иd) затем возвращают сжиженную богатую углеводородами фракцию (7) в теплообменник (E3).2. Способ по п. 1, в котором при нормальном режиме сжиженную богатую углеводородами фракцию (7) переохлаждают в теплообменнике (E3) под действием, по меньшей мере, одного потока хладагента и/или, по меньшей мере, одного потока смешанного хладагента,причем в режиме очистки этот поток хладагента и/или поток смешанного хладагента используют для охлаждения (E1, E2) богатой углеводородами фракции (3, 6), подлежащей сжижению.3. Способ по п. 1 или 2, в котором богатую углеводородами фракцию (3), подлежащую сжижению, сжижают и переохлаждают в течение, по меньшей мере, одного цикла охлаждения, причем часть потока хладагента, циркулирующего в цикле охлаждения, представляет собой размораживающий газ (10, 11).4. Способ по любому из п.п. 1 и 2, в котором при плавлении твердого осадка в теплообменнике (E3), по меньшей мере, каналы теплообменника, в которых может происходить образование твердого осадка, очищаются посредством очищающей среды.5. Способ по п. 3, в котором при

Claims (10)

1. Способ сжижения и переохлаждения богатой углеводородами фракции, в частности природного газа, согласно которому при охлаждении фракцию подвергают частичной конденсации для удаления тяжелых углеводородов, в частности бензола, отличающийся этапами, на которых:
a) сжиженную богатую углеводородами фракцию (7) переохлаждают в отдельном теплообменнике (E3) (нормальный режим),
b) прерывают подачу сжиженной богатой углеводородами фракции (7) в теплообменник (E3) не позднее, чем достигается заданный уровень отложения твердого осадка в теплообменнике (E3) (режим очистки),
c) плавят твердый осадок в теплообменнике (E3) размораживающим газом (10, 11) и извлекают из теплообменника (E3) и
d) затем возвращают сжиженную богатую углеводородами фракцию (7) в теплообменник (E3).
2. Способ по п. 1, в котором при нормальном режиме сжиженную богатую углеводородами фракцию (7) переохлаждают в теплообменнике (E3) под действием, по меньшей мере, одного потока хладагента и/или, по меньшей мере, одного потока смешанного хладагента,
причем в режиме очистки этот поток хладагента и/или поток смешанного хладагента используют для охлаждения (E1, E2) богатой углеводородами фракции (3, 6), подлежащей сжижению.
3. Способ по п. 1 или 2, в котором богатую углеводородами фракцию (3), подлежащую сжижению, сжижают и переохлаждают в течение, по меньшей мере, одного цикла охлаждения, причем часть потока хладагента, циркулирующего в цикле охлаждения, представляет собой размораживающий газ (10, 11).
4. Способ по любому из п.п. 1 и 2, в котором при плавлении твердого осадка в теплообменнике (E3), по меньшей мере, каналы теплообменника, в которых может происходить образование твердого осадка, очищаются посредством очищающей среды.
5. Способ по п. 3, в котором при плавлении твердого осадка в теплообменнике (E3), по меньшей мере, каналы теплообменника, в которых может происходить образование твердого осадка, очищаются посредством очищающей среды.
6. Способ по п. 4, отличающийся тем, что используемая очищающая среда представляет собой сухой азот и/или испаряющуюся газовую фракцию, образующуюся во время промежуточного хранения сжиженной и переохлажденной богатой углеводородами фракции.
7. Способ по п. 5, отличающийся тем, что используемая очищающая среда представляет собой сухой азот и/или испаряющуюся газовую фракцию, образующуюся во время промежуточного хранения сжиженной и переохлажденной богатой углеводородами фракции.
8. Способ по любому из п.п. 1, 2, 5-7, в котором охлаждение (E1), сжижение (E2) и переохлаждение (E3) богатой углеводородами фракции (3), подлежащей сжижению, осуществляют в спирально-змеевиковых теплообменниках и/или сварных пластинчатых теплообменниках.
9. Способ по п. 3, в котором охлаждение (E1), сжижение (E2) и переохлаждение (E3) богатой углеводородами фракции (3), подлежащей сжижению, осуществляют в спирально-змеевиковых теплообменниках и/или сварных пластинчатых теплообменниках.
10. Способ по п. 4, в котором охлаждение (E1), сжижение (E2) и переохлаждение (E3) богатой углеводородами фракции (3), подлежащей сжижению, осуществляют в спирально-змеевиковых теплообменниках и/или сварных пластинчатых теплообменниках.
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