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Device and method for enhancing desalting battery performance by using ion exchange mixed bed

An ion exchange and battery performance technology, applied in the field of electrochemical desalination, can solve problems such as rising internal resistance of batteries, and achieve the effects of reducing internal resistance, improving ionic conductivity, and increasing desalination rate

Inactive Publication Date: 2021-09-24
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Technical problem to be solved: Aiming at the above technical problem, the present invention provides a device and method for enhancing the performance of desalination battery by using an ion-exchange mixed bed, which simply and effectively solves the problem that the internal resistance of the battery increases when the salinity of the feed liquid decreases, and can significantly Improve the desalination rate and desalination rate of desalination batteries, reduce desalination energy consumption, and promote the practical application of desalination batteries in the field of desalination and desalination

Method used

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  • Device and method for enhancing desalting battery performance by using ion exchange mixed bed
  • Device and method for enhancing desalting battery performance by using ion exchange mixed bed
  • Device and method for enhancing desalting battery performance by using ion exchange mixed bed

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Experimental program
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Effect test

Embodiment 1

[0039] (1) Assembly figure 1 The structure of the flow desalination battery shown.

[0040] (2) Prepare 5 g / L, 4 g / L, 3 g / L, 2 g / L, 1 g / L, 0.8 g / L, 0.6 g / L, 0.4 g / L, 0.2 g / L respectively NaCl solution is used as the feed liquid, so that the feed liquid chamber is filled with the NaCl solution with the above-mentioned concentration gradient, and the two electrode chambers are filled with anion electrolyte and cation storage electrolyte respectively, and the electrolyte and feed liquid are kept static, and the two ends of the electrodes are connected to a double constant potential The internal resistance of the battery was analyzed by impedance spectroscopy, and the specific results are shown in Table 1.

[0041] (3) Select 5 g / L NaCl solution as the feed liquid for desalination. The amount of feed liquid is 50 mL, which is circulated by a peristaltic pump; the anion storage electrolyte and cation storage electrolyte are each 100 mL, which are circulated by a peristaltic pump; ...

Embodiment 2

[0052] (1) Assembly Figure 5 The structure of the flow desalination battery shown.

[0053] (2) Through a suitable pipeline connection method, the cation-storing electrolyte enters the electrode chamber 2 from the electrolyte inlet 10, fills the electrode chamber 2, and then flows out from the electrolyte outlet 11, and enters the electrode chamber 1 from the electrolyte inlet 8, Then flow out through the electrolyte outlet 9, and use a peristaltic pump to circulate this process. The amount of electrolyte for storing cations is 100 mL; the feed liquid is 10 g / L NaCl solution, and the first feed liquid chamber is filled with the feed liquid, and the feed liquid The liquid inlet and outlet are sealed, and the feed liquid in it is kept still as concentrated water, and the dosage is about 10 mL; the feed liquid in the second feed liquid chamber is circulated by a peristaltic pump, and the dosage is 50 mL, which is used as desalination water, that is, recovered The ratio is set t...

Embodiment 3

[0061] (1) Assembly figure 1 The structure of the flow desalination battery shown.

[0062] (2) Prepare NaCl solutions of 35 g / L, 20 g / L, 10 g / L, 9 g / L, 8 g / L, 7 g / L, 6 g / L, and 5 g / L respectively as the feed liquid , let the feed liquid chamber be filled with the NaCl solution with the above-mentioned concentration gradient, the two electrode chambers are filled with anion electrolyte and cation storage electrolyte respectively, keep the electrolyte and feed liquid static, connect the two ends of the electrodes to a bipotentiostat, and use impedance spectroscopy The internal resistance of the battery was analyzed by the analytical method, and the specific results are shown in Table 2.

[0063] (3) Select 35 g / L NaCl solution as the feed liquid for desalination. The amount of feed liquid is 50 mL, which is circulated by a peristaltic pump; the anion-storage electrolyte and cation-storage electrolyte are each 100 mL, and the peristaltic pump is used for circulation; Charge an...

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Abstract

The invention relates to a device and a method for enhancing the desalination battery performance by using an ion exchange mixed bed, and the device comprises at least two electrode chambers for filling electrolyte, a plurality of groups of feed liquid chambers which are connected in parallel and are used for filling feed liquid, and at least two diaphragms, the electrode chamber comprises at least one electrolyte inlet, at least one electrolyte outlet and at least one electrode, the feed liquid chamber is a feed liquid flowing area and comprises at least one feed liquid inlet and at least one feed liquid outlet, and at least one feed liquid chamber is filled with an ion exchange mixed bed; the ion exchange mixed bed is formed by mixing an anion exchanger and a cation exchanger, the feed liquid chambers are arranged between two adjacent electrode chambers, and the diaphragms are respectively arranged between the feed liquid chambers and between the feed liquid chambers and the electrode chambers. The ion exchange mixed bed is cheap and safe, and can effectively enhance the ionic conductivity of the low-salinity feed liquid, so that the energy consumption of the desalting battery is reduced, the desalting rate and the feed liquid recovery rate are improved, and the ion exchange mixed bed has practical significance in popularization and application of the liquid flow desalting battery.

Description

technical field [0001] The invention belongs to the technical field of electrochemical desalination, and in particular relates to a device and a method for enhancing the performance of a desalination battery by utilizing an ion exchange mixed bed. Background technique [0002] Water shortage has become a common problem faced by the whole world. On the one hand, with the continuous development of society and economy, the human demand for water resources is increasing day by day. On the other hand, due to environmental pollution and extreme climate caused by global climate change, fresh water resources are becoming increasingly scarce. 71% of the world is covered by water, but the fresh water resources that humans can actually use are extremely limited, and desalination of seawater has become an important way to solve the water crisis. Currently commonly used desalination technologies include reverse osmosis, multi-stage flash evaporation, multi-effect evaporation, electrod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J47/04C02F1/42
CPCB01J47/04C02F1/42C02F2001/427
Inventor 杨涛林鹏
Owner HOHAI UNIV
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