A solar air-gap membrane distillation seawater desalination device

Abstract

The invention provides a solar air gap membrane distillation seawater desalination device, comprising a solar light collection and conversion component and an air gap membrane distillation component; the solar light collection and conversion component is used for absorbing sunlight to generate infrared heat radiation; the air gap film The distillation assembly includes a material-liquid side flow channel of the membrane module and a fresh water flow channel; the membrane module material-liquid side flow channel is communicated with the seawater supply system; the membrane module material-liquid side flow channel absorbs the infrared rays generated by the solar light collection and conversion assembly. heat radiation; the flow channel between the steam permeable membrane and the condensing plate is a fresh water flow channel; the steam in the flow channel of the material liquid side of the membrane module can enter the fresh water flow channel through the steam permeable membrane. The solar energy absorbing device of the invention does not directly contact seawater, the temperature of the solar energy absorbing device can be higher, and the solar light collection and conversion components can be prevented from being polluted by the seawater, and has the advantages of high evaporation efficiency and strong anti-pollution ability.

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

Images