Membrane stack and electro-desalting assembly

An electric desalination and membrane stack technology, applied in the field of membrane stacks and electric desalination components, can solve the problem of the need to improve the desalination efficiency, and achieve the effects of strong hardness tolerance, enhanced mass transfer process, and low energy consumption

Active Publication Date: 2015-04-29
ZHEJIANG CATHAYRIPE ENVIRONMENTAL ENG
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  • Application Information

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Problems solved by technology

However, the desalination efficienc...

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  • Membrane stack and electro-desalting assembly
  • Membrane stack and electro-desalting assembly
  • Membrane stack and electro-desalting assembly

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Embodiment Construction

[0068] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0069] Such as Figure 1-Figure 10 As shown, the membrane stack includes several membrane bags 1, concentrated water grids 2 and fresh water grids 3, each membrane bag 1 includes an anion exchange membrane 11 and a cation exchange membrane 12; the concentrated water grid 2 is arranged on the anion exchange Between the membrane 11 and the cation exchange membrane 12; the fresh water grid 3 is arranged between two adjacent membrane bags 1; the two ends of the membrane bag 1 are provided with a first electrode sheet 4 and a second electrode sheet 5 for forming an electric field; The length of the first electrode sheet 4 or the second electrode sheet 5 is smaller than the length of the anion exchange membrane 11 or the cation exchange membrane 12 . The first electrode sheet 4 and the second electrode sheet 5 are arranged on the opposite inner side of the anion e...

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Abstract

The invention relates to a water treatment device and in particular relates to a membrane stack and an electro-desalting assembly. The membrane stack comprises membrane bags, a thickened water network and a fresh water network; each membrane bag comprises an anion exchange membrane and a cation exchange membrane; the thickened water network is arranged between the anion exchange membrane and the cation exchange membrane; the fresh water network is arranged in a gap between two adjacent membrane bags; a first electrode slice and a second electrode slice for forming an electric field are arranged at the two ends of the membrane bag; the first electrode slice or the second electrode slice is shorter than the anion exchange membrane or the cation exchange membrane. Water flow collecting grooves are formed evenly on the four sides of the central tube of the electro-desalting assembly; the membrane bags and the networks are spirally wound around the central tube to form a spiral-wound membrane core. The membrane core is arranged in a membrane shell to form the electro-desalting assembly. An uneven electric field is generated between the electrodes and the current density is uneven. The electro-desalting assembly has the advantages of high desalting efficiency, high hardness tolerance, low energy consumption and the like.

Description

technical field [0001] The invention relates to a water treatment device, in particular to a membrane stack and an electric desalination assembly. Background technique [0002] Common roll-type electrodialyzers are composed of anion and cation exchange membranes, mesh separators, positive and negative electrodes, concentrated and fresh water distribution headers, and the main structure is a roll-type cylindrical structure. That is to say, the ion exchange membrane and the mesh separator are closely attached to each other in sequence, and the water collecting pipe which doubles as an electrode is taken as the axial center to roll into a cylinder, and the outside of the cylinder is wrapped with a metal shell for the other electrode. [0003] Electric desalination is an advanced technology that combines electrodialysis technology and ion exchange technology. The system can pass through the anion and cation exchange membranes through the anion and cation exchange membranes throu...

Claims

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Application Information

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IPC IPC(8): C02F1/469C02F1/42
CPCC02F1/42C02F1/4695
Inventor 李光辉吴建平张荣强梁红波
Owner ZHEJIANG CATHAYRIPE ENVIRONMENTAL ENG
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