Solar thermal film coupled multi-effect water desalination device and method

Abstract

The invention discloses a solar thermal film coupling multi-effect water desalination device and method, and belongs to the field of seawater desalination devices. The device comprises a CPC condensation and heat collection distillation device, an active film distillation device and a collection box, wherein the CPC condensation and heat collection distillation device comprises a CPC condenser, atwo-way vacuum heat collection pipe, a first main pipe and a steam confluence pipe, the active film distillation device comprises a latent heat recovery water tank, the bottom of the latent heat recovery water tank is communicated with the first main pipe, a latent heat recovery coil pipe communicated with the steam confluence pipe is arranged in the latent heat recovery water tank, the water tankis communicated with the latent heat recovery water tank, a hydrophobic membrane is positioned on the wall of one side, opposite to the water tank, of the latent heat recovery water tank, and a condensed fresh water outlet is formed in the side surface of an air gap. According to the water desalination device and method disclosed by the embodiment of the invention, passive solar distillation, active solar distillation and membrane distillation technologies are combined, so that the solar energy utilization rate, the comprehensive energy efficiency of the system and the water production capacity can be greatly improved, and the purposes of uninterrupted operation and device miniaturization are achieved.

Description

technical field [0001] The invention relates to the field of seawater desalination devices, in particular to a solar thermal film coupled multi-effect desalination device and method. Background technique [0002] In recent years, the shortage of fresh water resources has become an important obstacle to national development, and the development of open source and incremental technologies for fresh water resources has become a top priority. Seawater desalination using traditional energy has the problems of high investment, serious pollution, and exacerbated energy shortage. Therefore, using solar energy for seawater desalination is an important direction of technological development. [0003] At present, the existing solar desalination technology is mainly divided into two methods, one is to use a passive solar distillation device, which does not have any power components (such as pumps and fans) driven by electric energy, and does not use Active heating equipment with additi...

AI Technical Summary

Problems solved by technology

The membrane distillation device has the advantages of not needing chemical treatment of raw water, not easy to scale, insensitive to pollution, low operating pressure, and compact structure. There are many problems such as high replacement cost, difficulty in recycling heat, large raw water consumption, low desalination water capacity, poor continuous water production capacity, etc.

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