Miniaturized low-concentration multistage seawater desalination system

Abstract

The invention discloses a miniaturized low-power condensation multistage seawater desalination system which comprises a condenser, the condenser is perpendicular to sunlight, a light outlet of the condenser is provided with a photo-thermal conversion layer, a capillary wick is arranged on the back face of the photo-thermal conversion layer, a plurality of stages of evaporation and condensation devices are arranged on one side of the capillary wick, each stage of evaporation and condensation device comprises a condensation plate and a capillary wick, and the capillary wick is arranged on the back face of the condensation plate. And the bottom end of the capillary wick extends into seawater. According to the invention, latent heat is recovered step by step, so that the theoretical water production rate limit of a traditional floating type seawater desalination system can be broken through, the problems of low water production rate, low efficiency and difficulty in collecting desalted water of the existing floating type seawater desalination system are solved, and the floating type seawater desalination system has the advantages of large water yield and suitability for remote areas.

Description

technical field [0001] The invention relates to a seawater desalination technology, in particular to a method for using a low power concentrating parabolic trough concentrator in a multistage seawater desalination device. Background technique [0002] Freshwater scarcity has become one of the most serious global challenges, affecting one-third of the world's population. Commercial seawater desalination technologies such as reverse osmosis and multi-stage flash evaporation have the disadvantages of high energy consumption and serious pollution. At the same time, good infrastructure is needed to support it, and it is difficult to popularize it in remote areas such as mountainous areas and islands. [0003] Using solar energy to desalinate seawater can solve the above-mentioned problems of energy consumption and pollution, and it can also be applied to remote areas. A common approach is to desalinize brackish water by absorbing sunlight and warming it up to facilitate the eva...

AI Technical Summary

Problems solved by technology

Although this method can conveniently use solar energy to drive seawater desalination, it has the following disadvantages: 1. Water can only absorb sunlight in the near-infrared band; 2. The entire water body is heated and evaporation only occurs on the interface

Although the theoretical water production rate limit of the floating structure can be broken through, the following defects still exist: 1. The heat flux received by the device is low, resulting in low water production rate; 2. There is no economically feasible method to suppress heat loss; 3. Economic efficiency Decreases significantly with the increase of the series

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