Continuous electrodeionization device

Abstract

The invention discloses a plate-and-frame electric deionizing unit. One side of working zone of freah water room is equipped with a fresh water room opening (21) connected to it; said opening is used as filling port for filling or changing ion material, and is sealed by sealing baffle; the two relative sides in heavy concentration water room working zone paralleling to fresh water flowing direction are provided with water inlet (25) and outlet (26) for heavy concentration room respectively; said inlet and outlet extend along direction parallelling to fresh water flowing direction. It is convenient for said device to fill and change resin on the pot, and adjust the resin filling ratio; the sealing problem caused by resin particle is avoided; and the water flow direction of fresh water and heavy concentration water is in cross flow.

Description

technical field [0001] The invention relates to an electrodeionization device, in particular to a device for removing ions in water by ion selective electroosmosis with plate and frame components. Background technique [0002] Continuous electric desalination technology, also known as electrodeionization (hereinafter referred to as EDI technology), uses the combined action of ion-conducting materials (such as ion-exchange resins and ion-exchange membranes) and electric current to deionize the ionic state or ionizable water in the fluid. A technique for separating chemical substances (impurities). Since the EDI component does not need acid-base regeneration when in use, the water quality of the produced water can reach or exceed that achieved by the ion exchange method, and the water quality of the produced water is stable and can be operated continuously. The device occupies less land than the ion exchange method, and does not require In the field of pure water and ultrapur...

AI Technical Summary

Problems solved by technology

[0007] The fresh water chamber of the existing plate-and-frame EDI module is a flat plate structure with a cavity in the middle, and the resin is filled into the middle cavity, which mainly has the following problems: During the assembly process of the module, each fresh water chamber needs to be filled separately Resin, the assembly cycle of the components is long, and it is difficult to ensure the uniformity of the filled resin; during the assembly process, the resin is also easily displaced to the sealing surface between the fresh water chamber and the concentrated water chamber, resulting in poor sealing of the components, and also Damage to the membrane; this resin filling method makes it difficult to fill the fresh water chamber with different ratios of ion exchange resins

In this way, the oxidative gas generated by the electrode reaction will not be discharged from the component, which will affect the performance of the component or cause damage to the ion exchange membrane and resin.

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