Solar seawater desalination techniques are considered to be one of the possible methods for obtaining freshwater resources. In recent years, researchers have studied research in solar evaporator material design, water / vapor / salt channels and photothermal regulation, and improved evaporators and photothermal conversion efficiency. However, solar evaporators face problems with cumbersome, poor material weather resistance and low long-term anti-salt durability during the actual application process.
Recently, the Green Printing Laboratory of the Institute of Chemistry, Chinese Academy of Sciences, Song Yanlin, Song Yanlin, a three-dimensional asymmetric structural evaporation system using 3D printing techniques, achieving high-salt efficient solar utilization and high water evaporation based on high-salt evaporation (Nat. Commun Further, it is further designed that a bridge arch solar energy evaporator is further prepared, which has excellent weather resistance and long-term salt resistance under high salt. A double-layer continuous water film is formed on the surface of the evaporator, and the lower-layer restroom layer is used to maintain the continuity of the water film to quickly replenish the liquid, and the upper layer can inhibit the accumulation of the salt in the high temperature region due to the temperature gradient. Stable salt in a long time. The evaporator continuously evaporates 200 h with a 10 wt% NaCl high salt, and the evaporator surface is also unsatisfactory, providing a new strategy for realizing automated continuous seawater dilution. The evaporator obtains cleaning water to the WHO's drinking standard, which can be used in crop planting; the seawater dilution technology provides new ideas to the island agricultural development.
Related research results were published on Advanced Materials. The research work is supported by the National Natural Science Foundation of China, the Ministry of Science and Technology and the Chinese Academy of Sciences.
3D bridge arch evaporator schematic, double layer liquid film row salt mechanism and seawater dilution - crop planting linkage system
