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Miniaturized low-concentration multistage seawater desalination system

A concentrator and stage evaporation technology, applied in seawater treatment, general water supply conservation, water/sewage treatment, etc., can solve the problems of declining economic efficiency, occurrence on the interface, low heat flux density, etc., to improve the water production rate, The effect of increasing water production and improving economic efficiency

Pending Publication Date: 2022-04-01
XI AN JIAOTONG UNIV
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  • Claims
  • Application Information

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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

Method used

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  • Miniaturized low-concentration multistage seawater desalination system
  • Miniaturized low-concentration multistage seawater desalination system

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Embodiment Construction

[0025] The content of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but the embodiments of the present invention are not limited thereto.

[0026] Such as figure 1 As shown, a miniaturized low-power concentrating multi-stage seawater desalination system provided by the present invention mainly includes a parabolic trough concentrator 1 that eliminates multiple reflections with a double concentration ratio, a light-to-heat conversion layer 2, and a capillary suction Liquid core 3, condenser plate 5 and frame 6 machined from PMMA. The concentrator 1 is arranged along a direction perpendicular to the sun's rays. The light outlet of the concentrator 1 is provided with a light-to-heat conversion layer 2, the surface of the other side of the light-to-heat conversion layer 2 is provided with a capillary wick 3, and the other side of the capillary wick 3 is provided with several stages of evapor...

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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...

Claims

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Application Information

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IPC IPC(8): C02F1/14C02F103/08
CPCY02A20/124Y02A20/142Y02A20/212
Inventor 毕宜鑫魏进家
Owner XI AN JIAOTONG UNIV
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