Improved roll-type electric demineralization device

Abstract

The invention discloses an improved roll-type electric demineralization device. The improved roll-type electric demineralization device comprises a central pipe as one pole of an electrode and a housing, wherein the other pole of the electrode is arranged on the housing; cation and anion exchange membranes are alternately arranged between the central pipe and the housing, and divide the space between the central pipe and the housing into a fresh water chamber and a concentrated water chamber; the fresh water chamber is filled with ion exchange resin; the pair of adjacent cation and anion exchange membranes forms a membrane bag; a first water flow inlet and a first water flow outlet are formed in the membrane bag; a second water flow inlet is formed in one end of the central pipe; a second water flow outlet is formed in the housing; a water distribution pipe is arranged at each of the two ends of the membrane bag; water distribution holes are formed in the side walls of the water distribution pipes; a screen is arranged between the adjacent water distribution pipes. According to the improved roll-type electric demineralization device, water distribution is uniform, the water flux density is high, and water can inflow and outflow more smoothly; the possibility of mixing of fresh water and concentrated water is lower, so that the pipeline arrangement and maintenance are further facilitated.

Description

Technical field [0001] The invention relates to a water treatment device in the field of water treatment, in particular to an improved roll-type electric desalinizer. Background technique [0002] Electric desalination, the English name is abbreviated as EDI. Electrodialysis combines electrodialysis with ion exchange technology. The fresh water chamber of the electrodialysis device is filled with ion exchangers. Under the action of a direct current electric field, the process of electrodialysis, ion exchange desalination and ion exchange continuous electric regeneration can be realized. Continuous production of high-quality pure water. [0003] The existing electric desalination device, such as the patent document of Chinese Patent Application No. 201410399732.2, discloses a roll-type electric desalination device. It consists of a central tube serving as one pole of the electrode and a concentric outer shell. The fresh water chamber is filled with ion exchange resin. A pair of ad...

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Problems solved by technology

However, there is also a problem. The water distribution channel at the edge of the film bag is soft and easy to deform, which affects the flow of water. The water flow is small, which affects the uniformity of water distribution.

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