Solar multi-effect distillation system

Abstract

The invention discloses a solar multi-effect distillation system. The system comprises a seawater desalination device, a solar heat collection plate and a focus reflector, wherein the seawater desalination device is arranged at the right center of the focus reflector; and the solar heat collection plate is arranged on the top surface of the seawater desalination device. According to the invention, the solar heat collection plate is utilized to preheat seawater, and the focus reflector is utilized to heat the seawater to boil the seawater, so the energy utilization rate of the new system is improved; a plurality of heat exchange covers are arranged in the seawater desalination device to promote the coagulation of the inner wall of the seawater desalination device and the flow film distillation on the outer wall of the seawater desalination device, so a new application of a low-temperature and multi-effect distillation technology in a single device is realized, thereby the system has the advantages of apparatus cost reduction, single machine water output improvement, effective recovery of the waste heat of the hot and concentrated seawater through the adoption of a water supply cycle, and apparatus heat efficiency improvement. The system has the characteristics of high energy utilization rate, large desalinated water output, low apparatus cost and the like, and is especially suitable for low-cost and large-scale production.

Description

technical field [0001] The invention belongs to the technical field of seawater desalination, in particular to a solar multiple-effect distillation system. Background technique [0002] Water is the source of life and an irreplaceable precious natural resource for human beings. However, with the continuous development of human civilization and continuous progress of society, the shortage of water resources has become a major problem facing human beings in the 21st century. The seawater resources on the earth are very rich, and 97% of the water is in the ocean, which contains a large amount of fresh water. The development of seawater desalination and obtaining fresh water from the ocean has become a common development trend of all countries in the world. [0003] Solar seawater desalination technology is a powerful way to rationally utilize seawater resources and solve the shortage of freshwater resources. At present, many domestic colleges and universities have joined the ...

AI Technical Summary

Problems solved by technology

[0004] At present, the main constraints for the widespread application of solar desalination technology are high system cost and low freshwater output

There are three main reasons for the low water production of traditional solar stills: first, the latent heat of vaporization of water vapor has not been reused; second, the natural convection heat transfer mode in traditional solar stills greatly limits the improvement of the thermal performance of stills; third It is because the heat capacity of the seawater to be evaporated is too large, which limits the increase of the operating temperature, thereby weakening the driving force of evaporation

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