Brackish water desalination process method and application apparatus thereof

A technology for desalination of brackish water and brackish water, applied in chemical instruments and methods, seawater treatment, general water supply conservation, etc., can solve the problems of reduced ion adsorption on the electrode surface and reduced desalination efficiency, so as to improve the desalination efficiency of capacitors, The effect of reducing ion concentration and simple equipment

Inactive Publication Date: 2014-07-02
康静
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Theoretical and experimental verification shows that if the concentration of ions in water is too high, the electric double layer on the surface of the electrode will be compressed and thinned, resulting in a decrease in the amount of adsorbed ions on the surface of the electrode and a decrease in desalination efficiency.

Method used

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  • Brackish water desalination process method and application apparatus thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Prepare sodium chloride solution: weigh 50.0 g of sodium chloride, add about 300 ml of distilled water to a 500 ml beaker, add sodium chloride, and stir with a glass rod to completely dissolve it. Drain the solution in the beaker with a glass rod and transfer it to a 1000ml volumetric flask. Wash the inner wall of the beaker with an appropriate amount of distilled water for 2 to 3 times, transfer the washing liquid to a volumetric flask, drain with a glass rod, shake, and add water to volume. First add water directly until it is 1 to 2 cm away from the 1000ml scale line, then use a rubber dropper to add water to the scale line.

[0035] Preparation of activated carbon electrode: Mix polytetrafluoroethylene binder and activated carbon at a weight ratio of 1:100, then drop a certain amount of alcohol, and stir evenly in an agate crucible to obtain a viscous mixture. Using a coating method, the viscous mixture is evenly coated on the graphite sheet with a coating area of ...

Embodiment 2

[0047] Use multi-walled carbon nanotubes (Shenzhen Nanometer Port) as the capacitor electrode active material for desalination, and other processes are the same as in the examples

[0048] 1. Detected by a conductivity meter, the conductivity of the solution dropped from 1050 micro-Siemens / cm to 320 micro-Siemens / cm.

Embodiment 3

[0050] Graphene is used as the capacitor electrode active material for desalination, and other processes are the same as in Example 1.

[0051] Detected by a conductivity meter, the conductivity of the solution dropped from 1050 micro-Siemens / cm to 280 micro-Siemens / cm.

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Abstract

The invention discloses a brackish water desalination method and an application apparatus thereof. According to the present invention, based on a defect of low efficiency of capacitor desalination, a capacitor desalination process and a forward osmosis process are integrated, capacitor desalination is adopted to reduce a concentration of brackish water, forward osmosis is adopted to further dilute brackish water, and steps are repeatedly cycled so as to reduce an ion concentration, reduce capacitor desalination efficiency, and achieve high concentration seawater desalination; and compared with the current commercial distillation method and the brackish water desalination method of the reverse osmosis method, the brackish water desalination process method of the present invention has the following advantages that: equipment is simple, operation is convenient and controllable, consumption of chemicals is not required, environmental pollution is not generated, and the technology is the most likely commercial brackish water desalination technology in the future.

Description

technical field [0001] The invention relates to a brackish water desalination project, in particular to a brackish water desalination method with capacitive deionization coupling forward osmosis and an application device thereof. Background technique [0002] Desalination of brackish water is to remove part or all of the salt in the water to meet the standards of people's living needs or other needs. Capacitive desalination is a solution deionization technology based on the principle of electric double layer adsorption. The basic idea of ​​capacitive desalination is to force the ions in the solution to move to the oppositely charged electrode by applying an electrostatic field, so as to remove the salt in the solution. However, at present, the desalination efficiency of capacitive desalination of brackish water is low, especially for the treatment of high-concentration brackish water and seawater. Capacitive desalination efficiency is related to ion concentration in water....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F103/08
CPCY02A20/131
Inventor 康静
Owner 康静
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