BRINE REFINING METHOD AND DEVICE BASED ON MEMBRANE TECHNOLOGY

摘要

Provided are a brine refining method and device based on a membrane separation technology. The brine refining method comprises: adding CO3 2 - and/or OH- ions, serving as precipitants or a precipitant, into crude brine, enabling the CO3 2 - and/or OH- to have a deposition reaction with cation impurities in the crude brine to generate a deposit, and then feeding the crude brine to a ceramic membrane for filtering, and removing the impurities, so as to obtain refined brine at the permeation side of the ceramic membrane. By means of the method, calcium ions, magnesium ions, sulfate ions and other impurity ions in the crude salt can be effectively removed.