Two-stage electrochemical crosslinking electrodialysis desalination treatment system and application thereof

Abstract

According to the two-stage electrochemical cross-linking electrodialysis desalination treatment system and the application thereof, high-salinity wastewater is treated based on the treatment system, the problem that in the prior art, membrane pollution is easily caused by organic matter pollution in wastewater can be effectively solved, meanwhile, synchronous acid-base separation is achieved, the effluent quality is improved, and the treatment cost is reduced. The water treatment process steps are reduced. The system comprises at least one two-section electrochemical cross-linking electrodialysis desalination treatment unit, the two-section electrochemical cross-linking electrodialysis desalination treatment unit comprises an outer anode and an outer cathode which are oppositely arranged, and the outer anode and the outer cathode are arranged in an area between the outer anode and the outer cathode. A first bipolar membrane, a cation exchange membrane, an inner cathode, an inner anode, an anion exchange membrane and a second bipolar membrane are sequentially arranged in the direction from the outer anode to the outer cathode; and the inner side cathode and the inner side anode are respectively a mesh-shaped cathode and a mesh-shaped anode.

Description

technical field [0001] The invention belongs to the technical field of green and environment-friendly industrial water treatment technology, and in particular relates to a two-stage electrochemical cross-linking electrodialysis desalination system which can be used for the treatment of high-salt wastewater (such as concentrated water after high salinity mine water treatment). Background technique [0002] With the continuous improvement of my country's coal mining water resource protection technology level, after more than 30 years of rapid development of mine water treatment and utilization technology and equipment in my country, a complete mine water "pretreatment-secondary treatment-advanced treatment "system, and is currently focusing on the development of a "zero discharge" technology system to achieve 100% resource utilization of mine water. In many types of mine water treatment projects, how to realize high-efficiency salt separation treatment and water quality reuse t...

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Problems solved by technology

[0005] In view of this, the present invention provides a two-stage electrochemical cross-linking electrodialysis desalination treatment system, based on the treatment system of the present invention to treat high-salt wastewater (TDS> 80g / L), especially high salinity mine water after upstream pretreatment The treated concentrated water can effectively improve the problem of membrane fouling caused by organic pollution in wastewater in the prior art. At the same time, the synchronous separation of acid and alkali can be realized, which is beneficial to improve the quality of effluent water and reduce the steps of water treatment process.

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