Method for physically treating complexing metal ion wastewater

Abstract

The invention provides a method for physically treating complexing metal ion wastewater. The method comprises the following steps: (1) directly pumping flexible electromagnetic shielding fabric wastewater or non-ferrous metal metallurgical wastewater or electroplating workshop surface water, cleaning water, flushing water and the like by virtue of a high pressure pump into a micro-filtration treater to be separated into fresh water and concentrated water; (2) separating the fresh water which is separated from the step (1) again by using a nano-filtration membrane, wherein the concentrated water enters into a concentration system for further concentration; (3) secondarily purifying the fresh water separated by nano-filtration concentration equipment in the step (2) by using reverse osmosis purification equipment, arranging a precise filter device to treat the concentrated water separated by the nano-filtration membrane in the step (2) before the nano-filtration concentration equipment is used for repeated concentration, and entering into a solar evaporation system for continuing to concentrate; and (4) electrolyzing a condensation body in the step (3) by adopting an electrolytic tank, extracting metals and returning a liquid to a raw water pond. The process overcomes the defects in the prior art, is simple in equipment, small in occupied area and free from chemical substances. By using a solar energy system, the complexing metal ions are extracted and water resources are recycled.

Description

Technical field: [0001] The invention belongs to the field of metal ion wastewater treatment, and particularly relates to a physical method for cleaning equipment and products in circuit boards, flexible electromagnetic shielding fabrics, non-ferrous metal smelting, electronics, electroplating and surface treatment workshops, which are relatively dirty and cannot be returned. A treatment method for complex metal ion wastewater used in a production line. Background technique: [0002] At present, chemical precipitation, ion exchange and membrane treatment are mainly used for metal ion treatment, but these methods have certain application ranges and limitations. The chemical precipitation method occupies a large area, consumes a large amount of chemicals, and causes serious pollution. And the stability is poor, the treatment capacity of the ion exchange method is limited and the regeneration is troublesome, and the membrane treatment method is easy to block the membrane, frequ...

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Problems solved by technology

[0002] At present, chemical precipitation, ion exchange and membrane treatment are mainly used for metal ion treatment, but these methods have certain application ranges and limitations. The chemical precipitation method occupies a large area, consumes a large amount of chemicals, and causes serious pollution. And the stability is poor, the treatment capacity of the ion exchange method is limited and the regeneration is troublesome, and the membrane treatment method is easy to clog the membrane, frequent replacement, and high cost

[0003] In order to overcome the shortcomings of large floor space, high cost and cumbersome process in the existing treatment methods, the present invention adopts a physical treatment method of complexed metal ions, which not only has simple equipment, small floor space, and does not need to add chemical substances , to achieve the extraction of complex metal ions and the recycling of water resources

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