Solar seawater desalination device utilizing air gap membrane distillation

Abstract

The invention provides a solar seawater desalination device utilizing air gap membrane distillation. The device comprises a sunlight collection and conversion assembly and an air gap membrane distillation assembly, wherein the sunlight collecting and converting assembly is used for absorbing sunlight to generate infrared heat radiation; the air gap membrane distillation assembly comprises a membrane assembly feed liquid side flow channel and a fresh water flow channel; the membrane module feed liquid side flow channel communicates with a seawater supply system, and absorbs infrared heat radiation generated by the sunlight collecting and converting module; a flow channel between a steam permeation membrane and a condensation plate is the fresh water flow channel; and steam in the membrane module feed liquid side flow channel can enter the fresh water flow channel through the steam permeation membrane. An solar energy absorption device of the invention is not in direct contact with seawater, the temperature of the solar energy absorption device can be higher, the sunlight collecting and converting assembly can be prevented from being polluted by seawater, and the solar seawater desalination device of the invention has the advantages of high evaporation efficiency and high anti-pollution capacity.

Description

technical field [0001] The invention relates to the technical field of solar seawater desalination, in particular to a solar air-gap membrane distillation seawater desalination device. Background technique [0002] The shortage of water resources is one of the major challenges facing mankind in the 21st century, and seawater desalination technology is expected to solve the problem of global freshwater shortage. Solar energy is an inexhaustible and easy-to-obtain green energy, and its application in seawater desalination can greatly reduce the power consumption required in the seawater desalination process. [0003] Membrane distillation (MD) technology is a new desalination technology that combines traditional distillation and membrane methods. This technology is mainly based on the principle of vapor-liquid equilibrium, using the latent heat of evaporation to achieve phase change, and the membrane acts as a selective barrier between the two phases to achieve the separation...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a solar air-gap membrane distillation seawater desalination device. The solar light collection and conversion component converts solar radiation into infrared radiation that can be directly absorbed by seawater. The feed liquid side of the membrane distillation device Seawater directly absorbs infrared radiation to heat and evaporate, which can solve the problems of complicated device structure, low efficiency and large heat loss caused by the separate installation of solar heat collectors and membrane distillation devices

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