REMOVING NATURAL GAS LIQUIDS FROM A GASEOUS NATURAL GAS STREAM

摘要

REMOVING NATURAL GAS LIQUIDS FROM A GASEOUS NATURAL GAS STREAM AT ELEVATED PRESSURE TO OBTAIN A GASEOUS PRODUCT STREAM HAVING A REDUCED CONTENT OF NATURAL GAS LIQUIDS COMPRISES: (A) INTRODUCING COOLED NATURAL GAS (3) INTO A SCRUB COLUMN (6) THAT CONSISTS OF A LOWER STRIPPING SECTION (7) AND AN UPPER ABSORPTION SECTION (8); (B) REMOVING FROM THE SCRUB COLUMN AN OVERHEAD STREAM (12);(C) PARTLY CONDENCING (14) THE OVERHEAD STREAM (12), AND SEPARATING (17) THE PARTLY CONDENSED OVERHEAD STREAM INTO A GASEOUS PRODUCT STREAM (20) AND A LIQUID REFLUX STREAM (21);(D) SPLITTING THE LIQUID REFLUX STREAM (21) INTO A FIRST REFLUX STREAM (22) AND A SECOND REFLUX STREAM (23); (E) INTRODUCING THE FIRST REFLUX STREAM (22) INTO THE TOP OF THE ABSORPTION SECTION (8) OF THE SCRUB COLUMN (6); AND (F) INTRODUCING THE SECOND REFLUX STREAM (23) INTO THE TOP OF THE STRIPPING SECTION (7), AND REMOVING FROM THE BOTTOM OF THE SCRUB COLUMN (6) A LIQUID BOTTOM STREAM (10) RICH IN HEAVIER COMPONENTS. (FIG.7)