Advanced treatment and recycling system for copper smelting acidic wastewater

Abstract

The invention discloses an advanced treatment system for copper smelting acidic wastewater. The advanced treatment system comprises an integrated precipitation device, a raw water tank, a raw water booster pump, a plate type heat exchange device, a multi-medium filter, an ultrafiltration membrane system, an intermediate water tank, a reverse osmosis booster pump, a precision filter, a reverse osmosis high-pressure pump, a nano filtration integrated device, a secondary high-pressure pump and a secondary reverse osmosis device. Pollution factors such as TDS and Cl<-> in acid wastewater generatedin the copper smelting electrolysis and acid making process section can be effectively reduced by the advanced treatment system; the treated wastewater can be used for purification procedures in an acid making system, including sample preparation in a waste acid and sewage treatment procedure, dosage, water quenching slag cooling in a smelting plant and the like, the amount of discharged wastewater and the pollution of a water environment are greatly reduced, and wastewater resource reutilization is realized. After being treated by a membrane system, the wastewater can be recycled to different acid making process sections, and the operation cost is reduced.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a system for advanced treatment and reuse of copper smelting pickling wastewater. Background technique [0002] In the reduction smelting process of copper concentrate, more than 90% of the arsenic contained in the concentrate volatilizes into the flue gas and dust in the form of gaseous AS2O3. Among them, arsenic exists in the polluted acid in the form of arsenite. After the lime-iron salt treatment, the Ca hardness in the wastewater is mostly permanent hardness in the form of calcium sulfate, and the main pollutant index TDS is - Mainly, there are Fe2+ and F- that have not been fully reacted, and the TDS is generally around 15000-30000mg / l. There are many disadvantages in direct discharge, and it is difficult to meet the requirements of environmentally friendly and clean production. Contents of the invention [0003] Aiming at the defects in the prior art, the present ...

AI Technical Summary

Problems solved by technology

After the lime-iron salt treatment, the Ca hardness in the wastewater is mostly permanent hardness in the form of calcium sulfate, and the main pollutant index TDS is - Mainly, there are Fe2+ and F- that have not fully reacted, and the TDS is generally around 15000-30000mg / l. There are many disadvantages in direct discharge, and it is difficult to meet the requirements of environmentally friendly and clean production

Images