Method and device for desalting seawater or brackish water

Abstract

The invention relates to the technical field of desalting of seawater or brackish water, and discloses a method for desalting seawater or brackish water. The method includes S1, blowing wet carrier gas through the seawater or brackish water and humidifying the seawater or brackish water until the seawater or brackish water is saturated; S2, absorbing moisture in the wet carrier gas by a material with electro-endosmosis and moisture absorption abilities; and S3, realizing an electro-endosmosis effect in the material with the electro-endosmosis and moisture absorption abilities by the aid of an electric field generated by a cathode and an anode, and draining the moisture absorbed by the material in a liquid form to obtain liquid fresh water. By the aid of the method, the purpose of desalting the brackish water effectively and continuously at low cost can be achieved, required external voltage is low due to operation under constant pressure, large quantities of latent heat of vaporization provided by heating and condensing links for water vapor are omitted, and energy conservation potential is remarkable; water which is a raw material does not need to be pretreated, scaling tendency of equipment is low, and the equipment is applicable to different types of water; and the equipment is installed flexibly and is convenient to operate and maintain.

Description

technical field [0001] The invention relates to the technical field of seawater or brackish water desalination, in particular to a seawater or brackish water desalination method and device. Background technique [0002] As the source of life, water is an irreplaceable resource in economic and social development. Due to the large-scale exploitation of human beings and the destruction of the environment and the resulting climate anomalies, the contradiction between the supply and demand of water resources has become more and more acute. In addition, the temporal and spatial distribution of water resources in my country is extremely uneven, as well as the aggravation of water pollution. The problem of water resources has become a bottleneck problem restricting the economic and social development of our country. [0003] At present, the methods to solve the problem of fresh water shortage in local areas mainly include: 1) diverting water from different places; 2) strengthening t...

AI Technical Summary

Problems solved by technology

In the desalination process of this device, low-grade solar energy is used to provide a large amount of latent heat of vaporization to water vapor, and then the latent heat of vaporization of water vapor is taken away by low-temperature seawater to achieve the purpose of seawater desalination and heat recovery, but the device exists at night and cloudy The defect that it cannot work, and at the same time, due to the existence of the heating device and the condensation device, it is not easy to miniaturize the equipment

[0009] Although the existing methods of humidifying and dehumidifying seawater or brackish water desalination can use low-grade energy such as solar energy and geothermal energy, the current humidification and dehumidification processes of this method need to provide a large amount of latent heat of vaporization for water vapor, which consumes a lot of energy. and requires more complex heating and condensing devices

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