Anti-pollution and anti-blocking saline-alkaline water desalination method and equipment

By setting up a polyurethane elastomer layer in the micro-nano desalination column and forming a cavity structure of the composite tube, the blockage and scale problems of micro-nano desalination column caused by organic macromolecules and Ca2+ and Mg2+ in saline water are solved, and the efficient desalination effect of saline and alkali water is achieved.

CN119707170AActive Publication Date: 2025-03-28ZHEJIANG UNIV
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Patent Information

Application Number
CN202411950264.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-27
Publication Date
2025-03-28
Estimated Expiration
2044-12-27

AI Technical Summary

Technical Problem

In the prior art, organic macromolecules, Ca2+ and Mg2+ in saline water are prone to blockage and scale of micro-nano desalination columns, resulting in low efficiency of desalination of saline water.

Method used

A salt-alkali water desalination method is adopted to set up a polyurethane elastomer layer in the micro-nano desalination column and form a composite tube cavity structure on the desalination film. The composite water channel between carbon nanotubes and silicon carbide is used to achieve separation of water and salt, and the high flowability of the polyurethane elastomer is used to prevent scaling.

Benefits of technology

It effectively avoids the adhesion of Ca2+, Mg2+ and organic matter in saline-alkali water on the desalinated film or micro-nano support column, improves the anti-scattering and soil resistance of the desalinated film and micro-nano support column, and improves the efficiency and effect of saline-alkali water desalination.

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Abstract

The invention relates to an anti-pollution and anti-blocking saline-alkaline water desalination method and equipment. The anti-pollution and anti-blocking saline-alkaline water desalination method comprises the following steps: primary precipitation of saline-alkaline water, heating, micro-nano desalination and water production. The micro-nano desalination column comprises a micro-nano support column and a desalination membrane wrapping the micro-nano support column, and a polyurethane elastomer layer is arranged between the micro-nano support column and the desalination membrane. According to the anti-pollution and anti-blocking saline-alkaline water desalination method, the carbon nanotubes, silicon carbide and the like of the desalination membrane form a composite water channel, hydrated ions cannot pass through the desalination membrane, only water and a small part of ions can pass through the desalination membrane, and separation of water and salt is achieved.
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