METHODS AND EQUIPMENTS FOR PREPARATION OF HIGH ENRICHMENT LITHIUM ION IN SEAWATER AND IT'S CONCENTRATE USING MEMBRANE SEPARATION AND EVAPORATION PROCESS

摘要

PURPOSE: A method and a device for highly enriching lithium ions included in seawater and enriching water using a membrane separation method and an evaporation method are provided to highly enrich enriching water, thereby drastically shortening lithium collecting time. CONSTITUTION: Raw water contains a lithium ion. Supplied water circulates in an NF(Nano Filtering) membrane module through a pre-processing process of the raw water. The NF membrane module is composed of a nano filtering membrane. Water passing through the NF membrane module is circulated in an RO(Reverse Osmosis) membrane module. The RO membrane module is composed of a reverse osmosis filtering membrane. Separated enriching water is inputted to an electrodialysis stack. The enriching water is enriched by an evaporation apparatus or an evaporation paper.