On-line ion exchange and recovery nickel-plating waste water control device

Abstract

The invention discloses a control device of recovering nickel plating wastewater through on-line ion-exchange, which is suitable for a nickel plating wastewater recovery system, the control device comprises a PH sensor, a conductivity sensor, an electromagnetic valve and a control unit, wherein the PH sensor tests the PH value of a water outlet of one of ion exchange columns of the nickel plating wastewater recovery system, the control unit judges whether a corresponding ion exchange column is failure or not according to the changing of the PH value, the conductivity sensor tests the conductivity of the recovered water of the nickel plating wastewater recovery system, the opening and closing of the electromagnetic valve are controlled according to the conductivity, thereby controlling a water supplement mechanism of the nickel plating wastewater recovery system to supply water or not. The invention is capable of improving the utilization ratio of resin of the ion exchange columns and the recycle rate of wastewater of the system.

Description

technical field [0001] The invention relates to a waste water treatment technology of an ion exchange method, in particular to a control device capable of improving the efficiency and effect of on-line ion exchange recovery of nickel-plating waste water. Background technique [0002] In water treatment technology, ion exchange resin is used to treat electroplating wastewater. The simple process is to recover metal from electroplating wastewater after cleaning plated parts, and then reuse the wastewater after metal recovery as cleaning water. Its advantage is that the effluent water quality after treatment is good, and water reuse and metal recovery can be realized. Therefore, the ion exchange resin method was once one of the most widely used technologies in the treatment of electroplating wastewater in my country. [0003] However, due to the relatively high operation and management requirements for the treatment of electroplating wastewater by the ion exchange resin method,...

AI Technical Summary

Problems solved by technology

Due to the influence of human factors and the influence of analysis methods and cycles, it is difficult to guarantee the recovery efficiency and effect of wastewater

Delaying the timing of resin regeneration will cause the resin to continue to operate after saturation and failure. As a result, nickel ions will be lost due to ineffective adsorption, and the cleaning effect of the plated parts will be affected due to the increase of nickel ion concentration in the circulating water.

In addition, the salinity will gradually accumulate when the recycled water is recycled. If the cleaning water is not properly replenished, the cleaning effect of the plated parts will be affected, and if it is excessively replenished, the recovery rate of nickel in the wastewater and the reuse rate of water will be reduced.

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