Systems and methods for removing nitrogen during liquefaction of natural gas

Abstract

Abstract A system and method for removing nitrogen during liquefaction of natural gas is provided. The system / method comprises a nitrogen rejection unit used in an LNG facility to remove nitrogen from natural gas during an LNG liquefaction process. The nitrogen rejection unit contains at least two columns and at least one 3-stream condenser, 2-stream condenser or two 2-stream condensers. Abstract BOX BOUNDARY 067 FIG. 2 REJECTION UNIT COLD X NITROGEN PCT / US2020 / 059649 452 X 448 416 414 412 2 / 3 X FROM HEAT BOUNDARY 434 492 432 436 wo 2021 / 092546 454 20 26 20 79 96 22 J ul 2 02 6 2 0 2 6 2 0 7 9 9 6 2 2 J u l 2 0 2 6 W O 2 0 2 1 / 0 9 2 5 4 6 4 4 4 M E T H A N E C O L D B O X B O U N D A R Y X F R O M H E A TX E X C H A N G E R 4 8 0 2 / 3 4 2 2 4 5 0 X P C T / U S 2 0 2 0 / 0 5 9 6 4 9 N I T R O G E NX REJECTION UNIT COLD B O X B O U N D A R Y

Images