公开(公告)号：MY110197A

公开(公告)日：1998-02-28

申请号：MYPI19940410

申请日：1994-02-22

Applicant: THE M W KELLOGG COMPANY

Inventor： WILLIAM CHARLES PETTERSON ,  CHARLES ARTHUR DURR ,  DAVID ALAN COYLE

IPC: C10L3/06 ,  C10G5/06 ,  F25J3/06 ,  C10L3/00 ,  C10L3/12 ,  F25J1/02 ,  F25J3/02

Abstract: A METHOD FOR PRETREATING A NATURAL GAS STREAM USING A SINGLE SCRUB COLUMN TO REMOVE FREEZABLE C5+ COMPONENTS AND PROVIDE AN LNG PRODUCT WHICH CAN BE CONVENIENTLY HANDLED AND SHIPPED IS DISCLOSED. THE METHOD COMPRISES FEEDING A NATURAL GAS STREAM TO A FEED POINT ON A SCRUB COLUMN OPERATED SUBSTANTIALLY AS AN ABSORPTION COLUMN WHEREIN THE HEAVY COMPONENTS ARE ABSORBED FROM THE FEED GAS USING A LIQUID REFLUX ESSENTIALLY FREE OF SUCH C5+ COMPONENTS. THE FEED CAN BE VAPOR INTRODUCED AT A LOW POINT ON THE COLUMN, OR CAN BE OPTIONALLY SPLIT, COOLED AND/OR EXPANDED AND INTRODUCED AT ONE OR MORE FEED POINTS ON THE COLUMN. THE REFLUX STREAM CAN BE OVERHEAD VAPOR CONDENSATE HAVING A TEMPERATURE OF ABOUT -40?C, OR METHANE-RICH LNG OR A COMBINATION OF LNG AND VAPOR CONDENSATE.(FIG. 1)