Method for performing continuous low-energy-consumption salt removal by utilizing flow battery redox reaction as well as application thereof

A flow battery and low energy consumption technology, applied in the field of desalination, can solve the problems that the distillation method cannot completely separate water and inorganic salts, cannot meet large-scale seawater desalination, and has strict water quality requirements

Active Publication Date: 2018-10-19
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Distillation seawater desalination is currently widely used, but it consumes a lot of energy and cannot be produced on a large scale, and the distillation method cannot completely separate water and inorganic salts. It has the main advantages of low cost, convenient operation, and no pollution to the environment, but there are disadvantages such as strict water quality requirements and the need for pretreatment of raw water; the electrodialysis process is simple in process, high in salt removal rate, and easy to operate
However, the water recovery rate is low, and it has no ability to remove uncharged substances such as organic matter, colloids, microorganisms, suspended matter, etc.
The above three seawater desalination methods still have certain limitations and cannot meet the needs of large-scale seawater desalination
[0004] To sum up, the above three seawater desalination methods have certain limitations. Therefore, a new environment-friendly seawater desalination technology with low energy consumption, continuous electrochemical redox reaction, and environmental friendliness is provided to solve the shortage of freshwater resources. issues are of great importance

Method used

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  • Method for performing continuous low-energy-consumption salt removal by utilizing flow battery redox reaction as well as application thereof
  • Method for performing continuous low-energy-consumption salt removal by utilizing flow battery redox reaction as well as application thereof
  • Method for performing continuous low-energy-consumption salt removal by utilizing flow battery redox reaction as well as application thereof

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Experimental program
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Effect test

Embodiment 1

[0081] A desalination device using a flow battery for low-energy continuous electrochemical redox reactions includes the following aspects: (I) positive and negative electrode materials; (II) electrolyte; (III) fluid equipment; (IV) isolation equipment;

[0082] (1) The preparation of the positive and negative electrode liquid flow material of described desalination flow battery device, concrete steps are as follows:

[0083] (1) 0.01g carboxylated carbon nanotubes [13] Put it into a beaker, add 100ml of deionized water, and perform ultrasonication at 3000w for 10mins to obtain a mixed solution A;

[0084] (2) 10mmol of AgNO 3 Join in the mixed solution A of step (1), carry out the rotating speed and be 1500r / min, the magnetic substirring of 0.5h, obtain mixed solution B;

[0085] (3) Add 400ml of 0.8mol / L NaBH 4 The solution is added dropwise to the mixed solution B in step (2) through a peristaltic pump; the speed of the peristaltic pump is: 1rpm, and after the dropwise a...

Embodiment 2

[0101] A desalination device using a flow battery for low-energy continuous electrochemical redox reactions includes the following aspects: (I) positive and negative electrode materials; (II) electrolyte; (III) fluid equipment; (IV) isolation equipment;

[0102] (1) The preparation of the positive and negative electrode liquid flow material of described desalination flow battery device, concrete steps are as follows:

[0103] (1) Put 0.03g of carboxylated carbon nanotubes into a beaker, add 100ml of deionized water, perform 3000w, 40mins of ultrasound, and obtain mixed solution A;

[0104] (2) 20mmol of AgNO 3 Join in the mixed solution A of step (1), carry out rotating speed and be 150r / min, the magnetic substirring of 2h, obtain mixed solution B;

[0105] (3) Add 800ml of 1.2mol / L NaBH 4 The solution is added dropwise to the mixed solution B in step (2) through a peristaltic pump; the speed of the peristaltic pump is: 1.5rpm, and after the dropwise addition, the rotating s...

Embodiment 3

[0121] A desalination device using a flow battery for low-energy continuous electrochemical redox reactions includes the following aspects: (I) positive and negative electrode materials; (II) electrolyte; (III) fluid equipment; (IV) isolation equipment;

[0122] (1) The preparation of the positive and negative electrode liquid flow material of described desalination flow battery device, concrete steps are as follows:

[0123] (1) Put 0.02g of carboxylated carbon nanotubes into a beaker, add 100ml of deionized water, perform 3000w, 20mins of ultrasound, and obtain mixed solution A;

[0124] (2) 15mmol of AgNO 3 Join in the mixed solution A of step (1), carry out rotating speed and be 1500r / min, the magnetic substirring of 1h, obtain mixed solution B;

[0125] (3) Add 600ml of 1mol / L NaBH 4 The solution is added dropwise to the mixed solution B in step (2) through a peristaltic pump; the speed of the peristaltic pump is: 1.2rpm, and after the dropwise addition, the rotating sp...

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Abstract

The invention discloses Method for performing continuous low-energy-consumption salt removal by utilizing flow battery redox reaction as well as application thereof. The method comprises the step of removing salt through a salt-removing flow battery device, wherein the salt-removing flow battery device takes positive and negative electrode active flow materials as the positive and negative electrodes of the flow battery as well as takes a salt solution as electrolyte of the flow battery; and the salt-removing flow battery device also comprises an isolating device for isolating the salt solution from the positive and negative electrode active flow materials as well as also comprises an anion exchange membrane and a cation exchange membrane. The salt-removing flow battery device is low in flow electrode salt-removing work voltage, extremely low in energy consumption, high in specific capacity and high in cycle performance, and the positive and negative electrode materials can be reused,so that the true salt-removing aim can be achieved. The method provided by the invention is low in low energy consumption, can continuously perform electrochemical redox reaction and environment-friendly novel seawater desalination technology, and can be used for solving the problem of insufficient supply of fresh water resources.

Description

technical field [0001] The invention belongs to the technical field of desalination, and in particular relates to a method for performing continuous low-energy desalination by using a flow battery redox reaction and its application. Background technique [0002] With the continuous growth of the world population and the rapid development of the economy and society, the global water resource crisis is intensifying, and many regions in the world are facing the shortage of fresh water resources. Seawater desalination is playing an increasingly important role in solving the global water shortage problem. . Seawater desalination is an important measure for coastal countries to solve the shortage of water resources, protect the ecological environment, and promote sustainable economic and social development. In addition to rivers, there are three main sources of fresh water in the world: groundwater, remote water diversion and seawater desalination. Among them, seawater desalinat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F103/08
CPCC02F1/467C02F2103/08
Inventor 陈福明胡晓乔侯贤华
Owner SOUTH CHINA NORMAL UNIVERSITY
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