Apparatus and method for continuous desalination of seawater

A seawater and water-repellent technology, applied in chemical instruments and methods, seawater treatment, general water supply conservation, etc., can solve problems such as continuous desalination of seawater, and achieve excellent light-to-heat conversion characteristics, strong Joule heating effect, and good mechanical strength.

Active Publication Date: 2020-01-24
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, it still does not solve the technical problem of continuous desalination of seawater

Method used

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  • Apparatus and method for continuous desalination of seawater
  • Apparatus and method for continuous desalination of seawater
  • Apparatus and method for continuous desalination of seawater

Examples

Experimental program
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Effect test

Embodiment 1

[0048] In the first step, using toluene as a carbon source and ferrocene as a catalyst, configure a 4% ferrocene / toluene solution, and use the floating assisted catalytic method (FCCVD) to grow at 740°C to prepare a wide-diameter (~80nm), High crystallinity (I G / D ≈2.51), high density (0.17 g / cm 3 ), highly controllable (20-1000μm) carbon nanotube arrays, such as image 3 Mix polydimethylsiloxane (PDMS) A and B components in a ratio of 10:1, remove air bubbles for 30 minutes, drop onto the surface of the carbon nanotube array with a pipette, let stand for 30 minutes after the array is completely infiltrated, set the spinner Coating procedure ① 500r-20s; ② 3000r-40s to remove excess resin, curing at 70°C for 3 h. After the curing is complete, the substrate is peeled off, the surface is polished to expose the ends of the carbon tubes, and the film is sliced ​​with an ultra-thin microtome to obtain a carbon nanotube array composite hydrophobic film. The surface and side of the ...

Embodiment 2

[0053] In the first step, use the carbon nanotube array composite porous membrane prepared in Example 1, and use conductive silver glue on both sides of the carbon membrane to bond titanium foil as electrodes for external power supply.

[0054] The second step is to fix the DC voltage at 15V, adjust the time for DC voltage to act on the carbon film, for example: 5min, 10min, 15min, 20min, 25min, 30min, 35min, and control the maximum surface temperature of the carbon film within the corresponding time when the voltage reaches 15V and reach stability.

[0055] The third step is to set the DC power supply voltage value and power-on time based on the data debugged in the second step. Only one piece of carbon film is clamped in the clip to realize the desalination of heavy brine (100g / L NaCl). The desalination device and desalination effect refer to Figure 9 (b). During the desalination process, the evaporation rate is 16.66kg / m when the power-on time is 5min, 10min, 15min, 20min...

Embodiment 3

[0057] In the first step, weigh 4mg carbon dragon complex 1#, carbon dragon complex 2#, carbon dragon complex 3#, carbon dragon complex 4# light / electrical responsive molecular powder, carbon dragon complex 1#-4 # are all osmium metal complexes, the molecular formula is as follows Figure 10 , dissolved in 2mL ethanol, ultrasonically mixed for 10min to obtain a photo / electrically responsive carbon dragon complex molecular solution with a concentration of 2mg / mL, using the carbon nanotube array composite porous membrane prepared in Example 1, the upper and lower surfaces of the membrane were co-coated Apply 100μL, 2mg / mL carbon dragon complex 1#, carbon dragon complex 2#, carbon dragon complex 3#, carbon dragon complex 4# photo / electrical responsive molecules, ( Figure 10 Different carbosaurol complex molecules have photo / electrical responsiveness, but different carbosaulon complex molecules have different photoelectric response characteristics).

[0058]In the second step, t...

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Abstract

The invention relates to an apparatus and method for continuous desalination of seawater. A hydrophobic carbon-based composite film is prepared by compounding of a carbon-based material such as carbonnanotubes or graphene, and a hydrophobic polymer, a hydrophobic carbon-based composite film with a micro-nano multi-level pore structure is obtained through laser drilling, the surface is further coated with photo-thermal / electro-thermal responsive polymer molecules to enhance electro Joule heat and photo-thermal effects to improve an energy utilization rate, and finally a hydrophobic carbon-based composite film with multi-level pore structure and electro-thermal and photo-thermal effects is obtained. A corresponding device is designed to apply the hydrophobic carbon-based composite porous film to an electro-thermal / photo-thermal driven seawater desalination process, conditions are controlled to cause the hydrophobic carbon-based composite porous film to generate heat, the heat is used asa heat source to provide a driving force for mass transfer in a water phase change process, and condensation is performed to recover water vapor to finally realize seawater desalination. The method combines a thermal phase change process and a film method, and can realize continuous seawater desalination for 24 h alternately between electro-thermal and photo-thermal.

Description

technical field [0001] The invention relates to a new energy-saving seawater desalination method, based on the efficient light-to-heat conversion efficiency of a class of carbon-based materials such as carbon nanotubes or graphene and the joule heating effect of electrification, combined with thermal phase change and evaporation mass transfer to realize seawater desalination process. Background technique [0002] With population growth and increasing water pollution, water scarcity has become one of the most serious global challenges facing human society. At present, seawater desalination technologies that have been developed and applied on a large scale include reverse osmosis (RO), electrodialysis (ED), multi-stage flash (MSF), and low-temperature multiple-effect (MED). The problem of energy consumption caused by the simultaneous operation of equipment cannot be ignored, and solar desalination technology is considered to be a promising technology due to its low energy con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/14C02F1/44C02F103/08
CPCC02F1/14C02F1/447C02F2201/009C02F2103/08B01D61/422B01D69/02B01D71/021B01D2325/28B01D61/364B01D67/0079B01D69/148B01D71/70B01D2323/30C02F2305/08C02F1/46176B01D2313/367B01D71/701B01D61/362B01D61/366B01D61/368B01D69/12B01D2325/02B01D2325/22B01D2325/38C02F1/448
Inventor 侯旭谢歆雯王苗邓文燕熊辉何文
Owner XIAMEN UNIV
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