DESALINATION SYSTEM FOR GLYCOL LEAN LIQUID CONTAINING HIGH-SOLUBILITY SALT IN DEEP-SEA NATURAL GAS EXTRACTION, AND DESALINATION METHOD THEREOF

摘要

Provided is a desalination system for a glycol lean liquid containing a high-solubility salt in deep-sea natural gas extraction, and a desalination method thereof, the desalination system comprising a MEG lean-liquid recovery apparatus, a salt-containing glycol lean-liquid flash distillation apparatus, and a first-order salt recovery apparatus; the salt-containing glycol lean-liquid flash distillation apparatus comprises a salt-containing glycol lean-liquid tank (1), a first transport pump (2), a negative-pressure flash distillation tank (3), a second transport pump (4), and a circulation heater (5); the MEG lean-liquid recovery apparatus comprises a negative-pressure condenser (6), a MEG lean-liquid receiving tank (7), a vacuum pump (8), a third transport pump (9), and a qualified MEG lean-liquid storage tank (10); the first-order salt recovery apparatus comprises a water tank (11), a fourth transport pump (12), a salt liquid tank (13), a fifth transport pump (14), a centrifuge (15), and a salt tank (16).