Method and system for recovering, reutilizing and treating electroplating water

Abstract

A method and system for recovering and treating electroplating water has electroplating water zero discharge and saves water resources. Pre-treated electroplating water is induced into treatment recovering system with multi-normal water treating devices for secondary treatment.

Description

technical field [0001] The invention relates to a method for recycling and treating electroplating water and a treatment and reuse system, in particular to a method and a treatment system for secondary water treatment capable of realizing zero discharge of electroplating water. Background technique [0002] Due to the increasing shortage of water resources and the impact of industrial wastewater on the environment, the zero discharge of industrial wastewater, especially electroplating wastewater, has always been one of the main goals for the treatment of industrial three wastes. However, most of the current electroplating enterprises directly discharge the electroplating wastewater after reaching the standard. The result is that a lot of water resources are wasted, and at the same time, there are still traces of harmful substances in the standard water that are discharged to the environment. If they accumulate for a long time, they will still be Pollution to the environment....

AI Technical Summary

Problems solved by technology

The method and device have the following deficiencies: firstly, not all the water is recycled in the waste water recovered and treated, such as the ground waste water in the production workshop, which contains a large amount of harmful substances, which can neither be directly reused nor treated without treatment. Does not meet emission standards

Secondly, in the process of liquid phase filtration, there is usually some raw water or flushing water, especially in the process of reverse osmosis machine, about 1 / 5-1 / 3 of the water cannot pass through the reverse osmosis membrane, otherwise the treatment will be greatly increased. cost

However, this part of the water that has not passed the membrane contains a large amount of ions or other impurities. Although this part of the water may have reached the discharge standard and can be discharged, it has not reached the "standard" when measured by the standard of zero discharge.

Third, the water used in the electroplating production line requires different standards (levels) of water due to different processes, and all recycled water is treated as a standard level, or some processes cannot be used, and additional water is required

Either treat all the wastewater into a higher level of water so that it can meet the water requirements of any process, but this will greatly increase the treatment cost

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