Solar distillation unit and distillation method

Abstract

The invention discloses a solar distillation unit and a distillation method. The solar distillation unit comprises a water drawing cavity, an evaporation and condensation cavity and a solute-containing water cavity which are sequentially arranged from left to right. The upper ends of the evaporation and condensation cavity and the solute-containing water cavity are connected with the bottom of a sunlight heat absorption device. Hydrophilic material layers which are communicated with each other are arranged between the upper end of the evaporation and condensation cavity and the bottom of the sunlight heat absorption device and in the solute-containing water cavity. A cavity body of the evaporation and condensation cavity is filled with gas of which the molar mass is smaller than that of water molecules. A water drawing device is arranged in the water drawing cavity, the left ends of the hydrophilic material layers are communicated with the water drawing device, and a through hole formed in the left side wall of the water drawing cavity is connected with the output right end of a planar fluorescent condenser. The lower end of the evaporation and condensation cavity is connected witha pipeline for outputting condensate. The water drawing device in the distillation unit is optimized, and efficient distillation is achieved; and large-scale production is facilitated.

Description

technical field [0001] The invention relates to a distillation unit and a method, in particular to a solar distillation unit and a distillation method. Background technique [0002] Water resources are an important resource for human survival. People cannot do without water resources in production and life. [0003] In today's era, water resource stress has become a worldwide problem. As far as our country is concerned, the total amount of water resources in our country ranks among the top in the world. However, the per capita water resources are less than 2,400 cubic meters, which is only about 1 / 4 of the world's average level. It is listed by the United Nations as one of the most water-poor countries. The eastern coastal provinces of my country are economically developed, densely populated, and have few fresh water resources per capita, but consume a lot of water for production and living; in recent years, the water consumption of inland provinces in my country has also i...

AI Technical Summary

Problems solved by technology

When the device runs for a long time, as the water in the water-absorbing material evaporates, the salt concentration in the material increases and even crystallizes, which blocks the pores of the material, reduces the evaporation rate, and affects the water production of the device.

In the fully passive device, the solution to this problem is still the free diffusion of concentrated salt, and the rate is slow, which also severely limits the large-scale design of this type of distillation device

Second, the limitation of forward heat and mass transfer direction

As we all know, hot steam is naturally convected upwards, so the existing distillation devices are often heat transfer upwards or sideways, so that the sunlight receiving surface is below the distillation device, which itself is opposite to the direction of natural light, and it is difficult to achieve high-efficiency solar energy reception and utilization. Restricting the development of solar desalination

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