Description

Project Overview

With the rapid development of the battery recycling industry, efficient treatment and resource recovery from waste battery wastewater have become increasingly important.

During waste battery recycling, sulfate-containing wastewater containing valuable metals such as cobalt, nickel, and manganese is generated. Due to its complex composition and high salt concentration, efficient treatment and resource recovery require advanced separation technologies.

A triple-effect forced circulation evaporator system is applied in this project for cobaltous sulfate recovery, concentrating the desulfurization liquor to a supersaturated state and enabling subsequent crystallization and separation of cobaltous sulfate products. The system achieves wastewater reduction, resource recovery, and improved process economics.

Process Technology   

A triple-effect forced circulation evaporator is adopted to concentrate the cobaltous sulfate-containing desulfurization liquor to a supersaturated state.

After reaching supersaturation, the concentrated slurry enters a centrifuge for solid-liquid separation. The recovered cobaltous sulfate crystals can be collected as a valuable product or recycled for further utilization, while the separated mother liquor is returned to the evaporator system for further concentration, forming a continuous circulation process. 

This process effectively enhances cobalt resource recovery, reduces wastewater discharge, and improves overall process efficiency.

Key Features

• High-efficiency evaporation

Triple-effect evaporation reduces steam consumption and improves energy efficiency.

• Reliable high-concentration operation

Forced circulation technology minimizes scaling and prevents blockage of heat transfer tubes during concentrated salt processing.

• Extended operating period

Optimized circulation design improves heat transfer performance and reduces cleaning frequency.

• Resource recovery

Enables recovery of valuable cobalt sulfate products from battery recycling wastewater.

• Automatic operation

PLC control system ensures stable and safe operation.

Main System Configuration

The complete system mainly consists of:

•  A Triple-effect forced circulation evaporator system;

•  A Centrifuge and mother liquor return system;

•  A Condensate heat recovery system;

•  A PLC automatic control system.

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