A dual-chamber membrane capacitive deionization device

A membrane capacitance deionization, dual-chamber technology, applied in electrodialysis, general water supply saving, etc., can solve the problems of high desalination energy consumption, large mass transfer resistance, poor desalination effect, etc., to improve desalination efficiency and low energy consumption. The effect of desalination and energy reduction

Active Publication Date: 2021-07-23
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problems of large mass transfer resistance, high desalination energy consumption and poor desalination effect of the membrane capacitive deionization device in the prior art, the present invention provides a double-chamber membrane capacitive deionization device

Method used

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  • A dual-chamber membrane capacitive deionization device
  • A dual-chamber membrane capacitive deionization device
  • A dual-chamber membrane capacitive deionization device

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 2 As shown, the present invention provides a double-chamber membrane capacitive deionization device, the deionization device is a double-chamber structure, the first chamber and the second chamber are at the upper and lower ends of the anion / cation exchange membrane Water flow channel diaphragms are arranged respectively, so that the raw water flows in a serpentine shape in the water flow channel diaphragms of the double chambers. Specifically, the first chamber includes a first collector electrode 1, a first electrode material 2, a first diaphragm 3, an anion exchange membrane 8, a first diaphragm 3, a first electrode material 2 and a common collector stacked up and down in sequence. The electrode 4; the second chamber includes the common collector 4, the second electrode material 5, the second diaphragm 6, the cation exchange membrane 9, the second diaphragm 6, the second electrode material 5 and the motor stacked up and down in sequence and the secon...

Embodiment 2

[0027]Utilize the constant flow pump to pass the NaCl solution of 3000mg / L concentration from the water storage tank of 20L through the upper end first diaphragm of the first chamber described in embodiment 1, and be positioned at the second diaphragm water outlet of lower end in the second chamber Measure the conductivity and convert it into concentration. When the concentration of the water outlet is stable, apply a DC voltage of 1.2V between the three collectors. When the concentration returns to the initial concentration again, it is the adsorption cycle. At this time, the collectors are short-circuited. The concentration changes during the treatment process are as follows image 3 As shown by the solid line in image 3 The dotted line in is the conductivity change curve of the traditional membrane capacitive deionization membrane during the desalination process.

[0028] image 3 The data shows that the ion concentration of the two devices began to decrease after the ap...

Embodiment 3

[0030] The inventor simply enlarged the scale of the device in Example 1, and carried out a multi-module performance test (10 groups): 10 groups of double-chamber membrane capacitive deionization devices described in Embodiment 1 were connected in series, and 10 groups of traditional membrane The capacitive deionization devices are connected in series, and the NaCl solution with a concentration of 1000, 2000, and 3000 mg / L is passed through 10 sets of double-chamber membrane capacitive deionization device series modules and traditional membrane capacitive deionization from a 20L water storage tank by using a constant flow pump. The device connects the modules in series, and measures the conductivity at the water outlet and converts it into a concentration. When the concentration of the water outlet is stable, a DC voltage of 1.2V is applied between the three collectors, and the current during the process is tested between the modules. and voltage (for calculating energy consump...

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Abstract

The invention belongs to the technical field of membrane capacitive deionization devices, and discloses a double-chamber membrane capacitive deionization device. The membrane capacitive deionization device has a double-chamber structure. The first chamber and the second chamber are respectively provided with water flow channel diaphragms at the upper and lower ends of the anion / cation exchange membrane, so that the raw water is in the water flow channel diaphragm of the double chambers. Serpentine flow. The membrane deionization device has small mass transfer resistance, low desalination energy consumption, and better desalination effect.

Description

technical field [0001] The invention relates to a membrane capacitive deionization device, in particular to a double-chamber membrane capacitive deionization device. Background technique [0002] Since the second industrial revolution, with the rapid development of the primary and secondary industries and the continuous growth of the population, the global availability of fresh water resources and the ever-increasing demand for fresh water resources have become one of the main contradictions in the 21st century. At present, all countries have begun to alleviate the water resource crisis through rational use and conservation of water. However, it is conceivable that such solutions are not a cure for the symptoms. Therefore, how to effectively use four-fifths of the ocean and lake water (ie seawater and brackish water) on the earth has become an effective way to fundamentally solve this contradiction. At present, there are very mature technical means for the suspended solids ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/48
CPCB01D61/48Y02A20/124
Inventor 刘勇袁勋
Owner QINGDAO UNIV OF SCI & TECH
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