• 专利标题:   Preparing sandwich-type long-term salt-resistance gel photothermal evaporator useful in e.g. seawater desalination, comprises e.g. adding inorganic metal salt, nano-carbon, and nano-attapulgite into alcohol-water mixed solution, placing in mold, and immersing one side in hydrophobic agent.
  • 专利号:   CN115282892-A
  • 发明人:   DING S, ZHU Y, LI X, SHEN Q, HUANG W, SUN W, JIN H, YUN S, CHEN J, ZHOU X
  • 专利权人:   HUAIYIN TECHNOLOGY INST
  • 国际专利分类:   B01J013/00, B32B033/00, B32B009/00, B32B009/04, C02F001/04, C02F001/14, F24S070/10
  • 专利详细信息:   CN115282892-A 04 Nov 2022 B01J-013/00 202302 Chinese
  • 申请详细信息:   CN115282892-A CN10933461 04 Aug 2022
  • 优先权号:   CN10933461

▎ 摘  要

NOVELTY - Preparing sandwich-type long-term salt-resistance gel photothermal evaporator, comprises e.g. adding inorganic metal salt, nano-carbon, nano-attapulgite, and plant fiber or man-made fiber into alcohol-water mixed solution and stirring, adding 1,2-propylene oxide into the alcohol-water mixed solution, placing in mold and allowing to stand for gelation, and drying to obtain inorganic metal salt-nano carbon composite airgel, immersing one side of the inorganic metal salt-nano carbon composite airgel in a hydrophobic agent for hydrophobic treatment to obtain a hydrophobic layer of the photothermal evaporator, and adding inorganic metal salt, nano-attapulgite and plant fiber or man-made fiber into the alcohol-water mixed solution, adding 1,2-propylene oxide into the alcohol-water mixed solution, and immersing the hydrophobic layer in the mixed solution to obtain water supply layer of the photothermal evaporator. USE - The sandwich-type long-term salt-resistance gel photothermal evaporator is useful in seawater desalination, salt lake brine concentration, chemical wastewater resource utilization and other solar evaporation utilization fields. ADVANTAGE - The method: improves the mechanical strength of the gel to meet the application requirements; and has capillary action of the rich micro-nano pores of the composite airgel and the heat collection efficiency of the nano-carbon which are the core components for efficient water evaporation. The photothermal evaporator: has high evaporation rate of 1-3.5 kg/m2×h; and solves the problem of the efficiency drop of the conventional evaporator due to salting out. DETAILED DESCRIPTION - Preparing sandwich-type long-term salt-resistance gel photothermal evaporator, comprises (i) adding inorganic metal salt, nano-carbon, nano-attapulgite, and plant fiber or man-made fiber into alcohol-water mixed solution and stirring until uniform, dropwise adding 1,2-propylene oxide into the alcohol-water mixed solution and mixing well, then placing in mold and allowing to stand for gelation, and drying to obtain inorganic metal salt-nano carbon composite airgel, which is light absorbing layer of photothermal evaporator, (ii) immersing one side of the inorganic metal salt-nano carbon composite airgel in a hydrophobic agent for hydrophobic treatment to obtain a hydrophobic layer of the photothermal evaporator, and (iii) adding inorganic metal salt, nano-attapulgite and plant fiber or man-made fiber into the alcohol-water mixed solution and stirring evenly, dropwise adding 1,2-propylene oxide into the alcohol-water mixed solution, and immersing the hydrophobic layer in the mixed solution and allowing to stand to obtain water supply layer of the photothermal evaporator; where the sandwich-type long-term salt-resistance gel photothermal evaporator includes inorganic metal salt-nano carbon composite airgel as upper light absorbing layer, lower water supply layer and a middle hydrophobic layer. DESCRIPTION OF DRAWING(S) - The diagram shows schematic representation of sandwich-type long-term salt-resistance gel photothermal evaporator.