Seawater desalination and lithium extraction system and method based on industrial waste heat and solar energy

Abstract

A seawater desalination and lithium extraction system and method based on industrial waste heat and solar energy falls within the technical field of seawater lithium extraction and seawater desalination. In view of characteristics of low lithium concentration in seawater and waste heat and solar energy in seawater desalination plants, industrial waste heat and solar energy are used for driving seawater desalination and seawater lithium extraction, and the concentrated seawater desalinated by low-temperature multi-effect evaporation is further evaporated and concentrated in a plate-type evaporator. The deep coupling of two processes of seawater desalination as well as seawater evaporation and lithium extraction reduces the cost of seawater desalination and lithium extraction. According to the difference of heat source quality and evaporation and concentration treatment capacity, industrial waste heat and solar hot water are reasonably matched as heat sources for seawater desalination and evaporation and concentrated seawater evaporation and lithium extraction from two aspects of heat source quality and flow rate. Three working conditions are used for rationally distributing industrial waste heat and solar energy to realize all-weather seawater desalination and lithium extraction operation.

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