A dual-mechanism salt-tolerant seawater desalination device and its application

A dual-mechanism, salt-tolerant technology, which is applied in seawater treatment, general water supply conservation, water/sewage treatment, etc., can solve problems such as inability to efficiently and stably treat seawater, and inability to achieve zero liquid discharge, achieving long-term stable operation, The effect of high energy conversion efficiency and efficient treatment

Active Publication Date: 2022-04-26
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the solar evaporator in the prior art cannot process seawater efficiently and stably, nor can it realize zero liquid discharge, the present invention provides a dual-mechanism salt-resistant seawater desalination treatment device and its application; the dual-mechanism design When the salt-tolerant solar evaporation device processes salt water until the water evaporates completely (leaving only salt solids or solute solids), the evaporation rate of the device does not decrease significantly; and the surface can still be kept clean, with no dirt deposited on it. surface

Method used

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  • A dual-mechanism salt-tolerant seawater desalination device and its application
  • A dual-mechanism salt-tolerant seawater desalination device and its application
  • A dual-mechanism salt-tolerant seawater desalination device and its application

Examples

Experimental program
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Effect test

Embodiment 1

[0069] We have carried out seawater desalination experiments using the dual-mechanism salt-tolerant seawater desalination device (without guiding salt beam) described in the present invention.

[0070] The dual-mechanism salt-tolerant seawater desalination device (without salt guiding beam) includes an absorber 1 , a base 3 , a water-absorbing layer 4 , and an insulating layer 5 . An absorber 1 and a base are arranged above the water-absorbing layer 4, and the base is located in an area other than the absorber 1; an insulating layer 5 is arranged below the water-absorbing layer 4;

[0071] The water-absorbing layer 4 is used for absorbing and transferring the water to be treated from the water container to the absorber 1 .

[0072] The absorber 1 is a polypyrrole glass fiber mat material, which is obtained by modifying the polypyrrole light-absorbing material on the glass fiber mat skeleton.

[0073] The base 3 is aluminum foil.

[0074] The water-absorbing layer 4 is dust-f...

Embodiment 2

[0084] We used the dual-mechanism salt-tolerant seawater desalination device described in the present invention to carry out a seawater desalination experiment with zero liquid discharge.

[0085] The dual-mechanism salt-tolerant seawater desalination device such as figure 1 As shown, it includes an absorber 1 , a salt guide bundle 2 , a base 3 , a water-absorbing layer 4 , and a thermal insulation layer 5 . An absorber 1 and a base are arranged above the water-absorbing layer 4, and the base is located in an area other than the absorber 1; an insulating layer 5 is arranged below the water-absorbing layer 4;

[0086] The water-absorbing layer 4 is used for absorbing and transferring the water to be treated from the water container to the absorber 1 .

[0087] The device also includes a plurality of salt-guiding beams 2 distributed around the absorber 1, one end of each salt-guiding beam 2 is arranged between the absorber 1 and the water-absorbing layer 4, and the other end is...

Embodiment 3

[0101] We conducted seawater desalination experiments using the same dual-mechanism salt-tolerant seawater desalination device described in the present invention as in Example 2.

[0102] Such as Figure 9 As shown, the dual-mechanism saline-tolerant seawater desalination device exhibits a very stable water collection rate when it operates in a 3.5wt% artificial seawater closed system under one solar illumination condition. As the water continued to evaporate for 120 hours, no salt deposits appeared on the surface, and the salt was guided to the base by the guide salt beam, and continued to crawl forward (such as Figure 10 ).

[0103] Such as Figure 11 As shown, the obtained purified water (obtained after desalination) was tested for ion concentration therein by an inductively coupled plasma spectrometer. The test results show that the ion concentration in the purified water can meet the drinking water standard stipulated by WHO.

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Abstract

The invention provides a dual-mechanism salt-resistant seawater desalination device and its application. The device includes an absorber, a base, a water-absorbing layer, and a thermal insulation layer; the absorber and the base are arranged above the water-absorbing layer, and the base is located outside the absorber. area; the water-absorbing layer is provided with a thermal insulation layer; the water-absorbing layer is used to absorb and transport the water to be treated into the absorber; Between the body and the water-absorbing layer, the other end is set on the base. The dual-mechanism salt-tolerant seawater desalination device can use solar energy to desalinate seawater. Due to the fast water transmission and water storage capacity of the multi-layer cross-bundle structure, salt and solute are not easy to precipitate on the upper surface of the absorber. At the same time, the salt guide beam guides the salt out and deposits it on the substrate through capillary action, and the salt crawling mechanism further guides the salt out, finally achieving solid-liquid separation. It has the advantages of being able to achieve long-term stable operation, no fouling, and high energy conversion efficiency.

Description

technical field [0001] The invention relates to the technical field of solar photothermal conversion, in particular to a dual-mechanism salt-tolerant seawater desalination treatment device and its application. Background technique [0002] With the rapid development of my country's economy and society and the increase of population, the lack of water resources has become one of the bottlenecks restricting economic and social development. According to statistics, more than one-third of the world's population is facing the pressure of drinking water shortage, and this number is expected to increase to two-thirds by 2025. Seawater desalination technology has become one of the best solutions to the shortage of freshwater resources by removing salt and solid impurities to obtain freshwater, so it has received continuous attention and research. The commonly used methods of seawater desalination can be classified into two categories: thermal seawater desalination and membrane seaw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/04C02F1/14C02F103/08
CPCC02F1/04C02F1/14C02F2103/08Y02A20/124Y02A20/142Y02A20/212
Inventor 张旺张书倩袁洋傅思齐赵鑫坤张荻
Owner SHANGHAI JIAO TONG UNIV
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