Treatment system and technology for copper-containing and high ammonia-nitrogen wastewater

Abstract

Belonging to the field of metallurgical wastewater treatment, the invention specifically relates to a treatment system for copper-containing and high ammonia-nitrogen wastewater. The system comprises a copper reactor, a filter unit and an ammonia-nitrogen separation device. The ammonia-nitrogen separation device comprises a gas-liquid mixing unit and a gas-liquid separation cavity. A liquid outlet of the copper reactor is connected to a liquid inlet of the filter unit, a filtrate outlet of the filter unit is connected to a liquid inlet of the gas-liquid mixing unit, the gas-liquid mixing unit is also equipped with an air inlet and a liquid outlet, the liquid outlet is communicated with the chamber of the gas-liquid separation cavity, the upper part and lower part of the gas-liquid separation cavity are respectively equipped with an air outlet and a liquid outlet. According to the technical scheme, copper-containing and high ammonia-nitrogen wastewater firstly undergoes copper recovery, then ammonia-nitrogen separation is carried out, and the pH value regulation and air compression in the ammonia-nitrogen separation process are both completed in the gas-liquid mixing unit, thus simplifying the treatment steps; the obtained gas and liquid mixture is directly injected into the separation chamber, the gas moves upward and the liquid gathers downward, thereby realizing the separation of ammonia-nitrogen gas.

Description

technical field [0001] The invention belongs to the field of metallurgical wastewater treatment, and in particular relates to a treatment system and a treatment process for copper-containing high-ammonia nitrogen wastewater. Background technique [0002] The quality of wastewater produced in the precious metal smelting process is relatively complex, and the copper and ammonia nitrogen content are quite different from traditional wastewater. The copper content is generally 8-11g / L, ammonia nitrogen 1500-5000mg / L, and the components of this type of wastewater include heavy metal ions. The fluctuation range is large and the processing difficulty is high. At present, domestic high-ammonia-nitrogen wastewater treatment methods mainly include biological methods, chemical precipitation methods, and stripping methods: biological methods are limited to the treatment of low-concentration ammonia-nitrogen wastewater, and the reaction time is long, and they have high requirements for re...

AI Technical Summary

Problems solved by technology

However, the high cost of treatment, the treatment of sediment, and the new phosphorus pollution are new problems faced by this method.

In the actual engineering application of treating high-ammonia-nitrogen wastewater, the traditional stripping method has disadvantages such as low removal efficiency, long time, large investment, large amount of steam consumption, and high operating cost.

Images