METHOD OF CLEANING NATURAL GAS GLYCOL DESICCANT SOLUTION Russian patent published in 2002 - IPC

FIELD: gas industry; units for field preparation of natural gas for main transport by means of absorption dehydration. SUBSTANCE: proposed method consists in direction of glycol solution after treatment to recuperative heat exchanger followed by supply of it to rectifying column still; cleaned concentrated glycol is extracted from center portion of mass-transfer section of column. Bottom are heated in evaporator where solution being heated is maintained in liquid phase state. Bottoms are circulated in the following circuit: rectifying column-still - intermediate reservoir - solid phase settler - circulating pump - evaporator - pressure regulator - rectifying column still. Vapor escaping from upper portion of rectifying column is cooled down and condensed. Vacuum required for conducting the process is formed due to evacuation of non-condensing vapor and gases by means of vacuum pump. EFFECT: enhanced efficiency of cleaning process; reduced deposition of salts and low-volatile admixtures in apparatus; reduced power requirements. 3 cl, 1 dwg, 1 tbl