Treatment method of copper chloride hydroxide production wastewater

Abstract

The invention relates to a treatment method of copper chloride hydroxide production wastewater. The treatment method comprises the following steps: carrying out solid-liquid separation treatment on production wastewater so as to obtain a first liquid supernatant, adding ammonia water into the first liquid supernatant so as to form a mixing system, and adjusting the pH value of the mixing system to be 4.5-5.5; oxidizing the mixing system so as to completely convert cuprous ions into copper ions, thereby obtaining first wastewater; feeding the first wastewater into an ion exchange system to remove free copper ions through adsorption, thereby obtaining second wastewater, wherein the ion exchange system comprises a plurality of reaction columns which are connected in series and filled with active resins, and the flow rate of the first wastewater in the reaction column is controlled to be 8-10m3 / h; feeding the second wastewater into an evaporation system to evaporate, thereby obtaining a concentrated solution, and then carrying out cooling, crystallizing, and solid-liquid separation treatment on the concentrated solution so as to obtain ammonium chloride. According to the treatment method, the recovery rate of resources in production wastewater is effectively improved, and the production efficiency also can be improved; and meanwhile, the method is environment-friendly, and has a good application prospect.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for treating copper and nitrogen elements in basic copper chloride production wastewater. Background technique [0002] Nitrogen is an indispensable nutrient element for plants, but if it is discharged into water bodies, especially in slow-moving lakes and bays, it is easy to cause a large number of algae and other microorganisms in the water to multiply, forming eutrophic pollution, and consuming a large amount of dissolved oxygen in the water. The ecological environment of the water body deteriorates, resulting in "eutrophication" of the water body. [0003] The main components of basic copper chloride (BCC) production wastewater are ammonium chloride and a small amount of copper ions, ammonium sulfate, and sodium chloride. The difficulty of treating this wastewater is mainly reflected in the removal of ammonia nitrogen in wastewater, and because it contains Other ...

AI Technical Summary

Problems solved by technology

However, the existing treatment methods lack the recovery and treatment of cuprous ions, so that some copper-containing compounds flow into the environment, which not only wastes resources, but also pollutes the environment; A more efficient and environmentally friendly treatment method,

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