Method for heating and desalting seawater based on gas-liquid interface

A gas-liquid interface, seawater technology, applied in chemical instruments and methods, heating water/sewage treatment, seawater treatment, etc., can solve problems such as heat loss, reduce seawater desalination efficiency, etc., achieve the effect of reducing heat loss and accelerating seawater distillation

Active Publication Date: 2018-07-13
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing "air-liquid interface" heating technology, when solar energy heats the seawater at the "air-liquid interface", the heat will be transferred through the lower non-evaporating seawater, resulting in heat loss and reducing the efficiency of seawater desalination

Method used

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  • Method for heating and desalting seawater based on gas-liquid interface
  • Method for heating and desalting seawater based on gas-liquid interface
  • Method for heating and desalting seawater based on gas-liquid interface

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Add 10mg of granular carbon nanotubes into a 100mL beaker filled with 40mL of artificial seawater, and ultrasonically crush them in a biosafer650-92 ultrasonic cell pulverizer to obtain a suspension of carbon nanotubes. The main parameters of the ultrasonic cell pulverizer are: ultrasonic Power 650W, ultrasonic power accuracy 75%, horn (mm) , temperature 30°C, ultrasound 5s, interval 5s, total time 60min. SEM images of carbon nanotubes before and after ultrasonic treatment figure 1 and 2 shown.

[0031] (2) Vacuum filter the suspension of carbon nanotubes on a 4 cm diameter round dust-free paper (vacuum degree is -0.015 to -0.02 MPa), and dry the dust-free paper at room temperature for 24 hours.

[0032] (3) Paste the dry dust-free paper with 10 mg of carbon nanotubes attached to the surface of a cylindrical polyurethane sponge soaked in water (bottom diameter 4cm, thickness 2cm), and float the carbon nanotube-dust-free paper-sponge combination On the surface o...

Embodiment 2～6

[0040] (1) Add 5, 7.5, 10, 15, and 20 mg of granular carbon nanotubes into five 100 mL beakers filled with 40 mL of artificial seawater, and ultrasonically crush them in a biosafer650-92 ultrasonic cell pulverizer to obtain carbon nanotube suspensions. liquid, the main parameters of the ultrasonic cell pulverizer are: ultrasonic power 650W, ultrasonic power accuracy 75%, horn (mm) , temperature 30°C, ultrasound 5s, interval 5s, total time 60min.

[0041] (2) Vacuum filter the suspension of carbon nanotubes on a 4 cm diameter round dust-free paper (vacuum degree is -0.015 to -0.02 MPa), and dry the dust-free paper at room temperature for 24 hours.

[0042] (3) Paste the dry dust-free paper with carbon nanotubes attached on the surface of a cylindrical polyurethane sponge (bottom diameter 4cm, thickness 2cm) soaked in water, and float the sponge-dust-free paper-carbon nanotube combination on On the water surface of a 50ml beaker (diameter 4cm) filled with artificial seawater, t...

Embodiment 7

[0046] (1) Add 10mg of granular carbon nanotubes into a 100mL beaker filled with 40mL of artificial seawater, and ultrasonically crush them in a biosafer650-92 ultrasonic cell pulverizer to obtain a suspension of carbon nanotubes. The main parameters of the ultrasonic cell pulverizer are: ultrasonic Power 650W, ultrasonic power accuracy 75%, horn (mm) , temperature 30°C, ultrasound 5s, interval 5s, total time 60min.

[0047] (2) Vacuum filter the suspension of carbon nanotubes on a round dust-free paper with a diameter of 4 cm (vacuum degree is -0.015 to -0.02 MPa), and dry the dust-free paper at room temperature for 24 hours;

[0048] (3) Paste the dry dust-free paper with 10 mg of carbon nanotubes attached to the surface of a cylindrical polyurethane sponge soaked in water (bottom diameter 4cm, thickness 2cm), and float the sponge-dust-free paper-carbon nanotube combination On the surface of a 50ml beaker (diameter 4cm) filled with artificial seawater, the beaker is placed...

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Abstract

The invention relates to a method for heating and desalting seawater based on a gas-liquid interface. The method comprises the following steps: 1) dispersing carbon nanotubes in water and carrying outultrasonic treatment to obtain a carbon nanotube turbid solution; 2) putting the carbon nanotube turbid solution on dust-free paper and filtering in vacuum; then carrying out drying treatment on thedust-free paper to obtain carbon nanotube loaded dust-free paper; 3) after sponge sucks seawater to be desalted, enabling the sponge to be suspended on the surface of the seawater to be desalted; sticking the carbon nanotube loaded dust-free paper on the sponge to obtain carbon nanotube-dust-free paper-sponge which is floated on the surface of the seawater to be desalted; then carrying out light illumination and distilling the seawater to be desalted. According to the method, the carbon nanotube-dust-free paper-sponge is used as a photo-thermal conversion material, the heat energy is sufficiently utilized, the heat loss is reduced and the distillation of the seawater is accelerated.

Description

technical field [0001] The invention relates to the field of seawater desalination, in particular to a method for desalinating seawater based on gas-liquid interface heating. Background technique [0002] At present, more than one-third of the world's population lives in water-scarce areas, and the scarcity of fresh water resources is becoming more and more serious, which has become a global environmental problem and even a political problem. Desalination of seawater is considered to be one of the most practical and effective ways to provide a sustainable source of fresh water. Seawater desalination methods can be divided into evaporation method, membrane method, crystallization method, solvent extraction method and ion exchange method according to the separation process. Evaporation method (distillation method) and membrane method are the most widely used in practice. [0003] At present, the most commonly used seawater desalination methods in engineering are multi-stage f...

Claims

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Application Information

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IPC IPC(8): C02F1/04C02F103/08
CPCC02F1/048C02F2103/08Y02A20/124
Inventor 叶苗苗甘启茂张土乔陈蓉朱科杭王迅
Owner ZHEJIANG UNIV
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