Solar thermal seawater desalination device

A solar energy and photothermal technology, applied in seawater treatment, general water supply conservation, water/sewage treatment, etc., can solve problems such as salinity reduction, achieve the effects of improving stability, rapid photothermal evaporation, and improving photothermal conversion efficiency

Pending Publication Date: 2019-09-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a solar photothermal seawater desalination device, which has a simple structure, is easy to operate, and can efficiently collect condensed water, solves the problem of light blocking of condensed water and steam, and improves the stability and photothermal conversion of the photothermal seawater desalination system. The efficiency is significantly improved, and the salinity is significantly reduced before and after seawater desalination

Method used

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  • Solar thermal seawater desalination device
  • Solar thermal seawater desalination device
  • Solar thermal seawater desalination device

Examples

Experimental program
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Effect test

Embodiment 1

[0085] Such as figure 1 , figure 2 and image 3 As shown, the exhaust fan 10 is installed in the exhaust channel 11 on the side wall of the evaporation chamber 3, driven by the electric energy provided by the solar panel 12, and continuously operates; the evaporation chamber 3 and the collection chamber 4 are distributed up and down to form an integrated structure; Inject into the evaporation chamber 3 through the water inlet 5 of the evaporation chamber; put the photothermal evaporation material 2 into the evaporation chamber 3 from above, and float on the seawater; height, to prevent seawater from flowing into the collection chamber 4 through the air pumping channel 11 and the steam dredging pipe 9; the light-transmitting condensation plate 1 covers the evaporation chamber 3 at an inclination angle of 30°, which not only plays the role of sealing the evaporation chamber 3, It also plays the role of condensing water vapor and guiding the condensed water to the collection c...

Embodiment 2

[0104] The solar photothermal seawater desalination device used in this example is as described in Example 1, wherein the preparation method of photothermal evaporation material 2 is as follows:

[0105] 1. configure graphene oxide aqueous solution, wherein the concentration of graphene oxide is 5g L -1 , the concentration of sodium tetraborate decahydrate is 2mmol L -1 , the concentration of ethylenediamine is 8mmol L -1 ;

[0106] 2. The prepared graphene oxide aqueous solution was transferred to a Teflon high-temperature and high-pressure reactor, maintained at 120°C for 12 hours, and then cooled to room temperature to obtain a graphene hydrogel;

[0107] 3. soak the obtained graphene hydrogel with ethanol aqueous solution for 12h, wherein the volume fraction of ethanol is 20%, the purpose is to clean the residual additives on the surface of the graphene hydrogel;

[0108] 4. Transfer the cleaned graphene hydrogel to a freezing chamber with a temperature of -60°C, freeze...

Embodiment 3

[0116] The solar photothermal seawater desalination device used in this example is as described in Example 1, wherein the preparation method of photothermal evaporation material 2 is as follows:

[0117] 1. configure graphene oxide aqueous solution, wherein the concentration of graphene oxide is 5g L -1 , the concentration of sodium tetraborate decahydrate is 3mmol L -1 , the concentration of ethylenediamine is 12mmol L -1 ;

[0118] 2. The prepared graphene oxide aqueous solution was transferred to a Teflon high-temperature and high-pressure reactor, maintained at 90°C for 6 hours, then maintained at 180°C for 6 hours, and finally cooled to room temperature to obtain a graphene hydrogel;

[0119] 3. soak the obtained graphene hydrogel with ethanol aqueous solution for 18h, wherein the volume fraction of ethanol is 20%, the purpose is to clean the residual additives on the surface of the graphene hydrogel;

[0120] 4. Transfer the cleaned graphene hydrogel to a freezing chamb...

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Abstract

The invention discloses a solar thermal seawater desalination device, which comprises a light transmission condensation plate, an evaporation chamber and a collection chamber from top to bottom in order. The evaporation chamber is internally provided with a photothermal evaporation material, and the light transmission condensation plate covers the evaporation chamber and guides condensed water tothe collection chamber. The photothermal evaporation material comprises a heat insulator and a light absorber covering the outer surface of the heat insulator, the light absorber is vertically oriented graphene with the surface modified by a hydrophilic functional group, the heat insulator is graphene foam, and the vertically oriented graphene and graphene foam are connected by a covalent bond. The solar seawater desalination device provided by the invention has the characteristics of simple structure and easy operation, can collect condensed water efficiently, solves the light blocking problem of condensed water and steam, and improves the stability and photothermal conversion efficiency of the solar thermal seawater desalination system.

Description

technical field [0001] The invention relates to the technical field of seawater desalination, in particular to a solar photothermal seawater desalination device. Background technique [0002] With the surge of environmental pollution and human demand, the scarcity of fresh water resources has become increasingly serious and has become a global problem that needs to be solved urgently. [L.Zhou et al.Nat.Photonics 2016,10:393-398] Among the global water resources, nearly 97.5% of the total are salt water resources such as sea water. How to extract fresh water resources from sea water in a clean way is Hot issues of current international concern. Solar energy is the most widely distributed and the largest energy reserve on the earth. The related technology of using solar energy to drive seawater desalination has attracted extensive attention in the research and industrial fields because of its clean and sustainable characteristics. Photothermal direct evaporation, condensatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/14C02F103/08
CPCC02F1/14C02F2103/08Y02A20/124Y02A20/142Y02A20/212
Inventor 薄拯杨化超吴声豪严建华岑可法
Owner ZHEJIANG UNIV
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