Continuous electrodeionization device

A technology of electrodeionization and cation exchange membranes, applied in the field of electrodeionization devices, can solve problems such as difficulty in ensuring the uniformity of filling resin, damage to ion exchange membranes and resins, difficulty in filling ion exchange resins, etc., to avoid the possibility of scaling performance, avoiding performance degradation, and simplifying the assembly process

Inactive Publication Date: 2008-03-05
四川龙瑞源环境科技股份有限公司
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  • Description
  • Claims
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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.

Method used

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  • Continuous electrodeionization device
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Embodiment Construction

[0047] Firstly, referring to Fig. 4, 5 and 9, the present invention will be described to realize the filling structure of the ion exchange resin in the fresh water chamber for filling and replacing.

[0048] As shown in Figure 4, the fresh water chamber of the EDI assembly of the present invention is made of a substantially rectangular plate-and-frame die with a working area or an intermediate cavity 27, which can be filled with ion-conducting materials such as ion-exchange resins (not shown in the figure) in the working area 27 out). The upstream side of the fresh water chamber along the water flow direction is provided with an opening 21, which can be used as a resin filling port and a fresh water inlet; the downstream side of the fresh water chamber opposite to the opening 21 is provided with a fresh water outlet hole 22. The fresh water inlet distribution device 23 is arranged between the opening 22 and the middle cavity 27 and communicated therewith, and the fresh water o...

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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 ionic or ionizable fluids. A technique for separating 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 ultrapure water manufacturing, EDI tech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/46C02F1/469
Inventor 李光辉
Owner 四川龙瑞源环境科技股份有限公司
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