Integrated membrane electroplated nickel-contained rinsing water zero-discharging process and special equipment thereof

Abstract

The invention provides an integrated membrane electroplated nickel-contained rinsing water zero-discharging process and special equipment thereof. The process comprises the following steps of: first, collecting electroplated nickel-contained rinsing waste water; adjusting the quantity of the collected rinsing waste water so that the water quality of the rinsing waste water is uniform; next, pre-treating the adjusted rinsing waste water; filtering the rinsing waste water so as to remove particulates with diameters of more than 100 microns in the rinsing waste water; and then carrying out three-stage separation on the pre-treated rinsing waste water. After the rinsing waste water of an electroplating factory is treated by using the recycling treatment special equipment designed according tothe process provided by the invention, the metal nickel in the rinsing waste water is recycled; and the rinsing waste water is filtered to enter a producing system to be reused so that the recycling rate of the rinsing waste water reaches zero discharge, the pollution of the sewage to the environment is reduced and the production cost is saved.

Description

technical field [0001] The invention belongs to the technical field of recovery and treatment of electroplating wastewater, specifically a zero-discharge process and special equipment for full-film electroplating nickel-containing rinsing water Background technique [0002] With the improvement of people's living standards, the number of durable consumer goods has increased greatly. Electroplating has been widely used as a post-treatment process to prevent durable consumer goods from being oxidized, prolong the life of durable consumer goods and improve surface quality. However, the electroplating process produces Wastewater will cause great harm to the natural environment, especially if the nickel-containing electroplating wastewater is discharged directly, it will cause great pollution to the environment, which does not meet the current requirements for energy conservation and emission reduction in industrial production. [0003] At present, the traditional electroplating ...

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Problems solved by technology

[0002] With the improvement of people's living standards, the number of durable consumer goods has increased greatly. Electroplating has been widely used as a post-treatment process to prevent durable consumer goods from being oxidized, prolong the life of durable consumer goods and improve surface quality. However, the electroplating process produces Wastewater will cause great harm to the natural environment, especially if the nickel-containing electroplating wastewater is discharged directly, it will cause great pollution to the environment, which does not meet the current requirements for energy conservation and emission reduction in industrial production.

[0003] At present, the traditional electroplating nickel-containing wastewater treatment process is to add alkali to precipitate nickel and then carry out sludge treatment or reuse; another more advanced process is to use resin to treat electroplating wastewater by ion exchange. From the process principle, it can be found that The recovery and treatment process of these two kinds of electroplating wastewater is simply to use chemical ion exchange to exchange wastewater. Stable, high investment cost, low recovery rate of nickel, produced water cannot be reused but directly discharged, resulting in waste and loss of resources and environmental pollution

[0004] The Chinese journal "Material Science" Volume 44, Issue 7 "Using Special Separation Membrane Technology to Highly Recover Electroplating Wastewater" discloses a multi-stage membrane treatment process for electroplating wastewater, which realizes zero discharge or trace discharge of electroplating wastewater. The utilization rate of wastewater is improved, but the technical scheme disclosed in the paper is suitable for the recycling of comprehensive wastewater in electroplating plants, and the concentration of concentrated water is increased by three-effect evaporation, which is too costly

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