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The hardware product electroplating project should first make clear whether the production process to be adopted by the project belongs to the list of restrictive and elimination categories in the industrial structure adjustment directories (2011), the elimination of backward production technology and equipment and product guidance catalogue (2010), if it belongs to the restrictive and naughty categories. The production technology and equipment of jig should be rejected. "Industrial structure adjustment directories (2011)" (Revised) clearly points out "elimination of toxic and harmful cyanide plating technology (gold potassium cyanide gold plating and cyanide gold potassium gold plating (2014)); silver, copper base alloy and pre plating process (temporary elimination); therefore, the metal product electroplating project should phase out cyanide containing electroplating. In the EIA report, the necessity of the cyanide plating process to be postponed is analyzed in detail, and suggestions for developing and replacing the technology are put forward. At the same time, the electroplating project should also make a clear analysis of whether the project construction meets the national and local industry access conditions, the heavy metal pollution control requirements and so on, and analyzes the conformity analysis of the project construction and the current industrial policy.
According to the discharge standard of electroplating pollutants and the technical specification for the treatment of electroplating wastewater treatment (HJ2002-2010), the separation and quality treatment of electroplating wastewater should be realized, and the separation and collection system for the separation and separation of the electroplating wastewater is an important part of the analysis of the electroplating project of the hardware. According to the characteristics of electroplating wastewater, the general minimum of electroplating wastewater should be divided into cyanide containing wastewater, chromium containing wastewater, nickel containing wastewater, oil containing waste water and comprehensive wastewater (excluding a category of pollutants) according to the characteristics of electroplating wastewater. Five other waste water was collected and processed. Some enterprises also collected and treated coke Copper Wastewater and surface washing wastewater. The electroplating wastewater of the hardware products has achieved seven water quality shunting and separate treatment. The scheme of classifying and collecting electroplating waste water is shown in the picture.
Electroplating workshop partition prevention and control, according to the type of wastewater discharge, divided into cyanide zone, chromium containing area, nickel bearing area, pre treatment area, comprehensive area, and so on. All areas are divided by dike, eliminate waste water through water wash trough overflow discharge to floor discharge, directly through pipe access to separate pipeline. Among them, the surface washing wastewater containing chromium, cyanide and nickel should enter their separate separation and collection pipelines. Through the construction of the separate separation and collection system of electroplating wastewater, the discharge of electroplating wastewater has been achieved and the level of environmental management has been raised.
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