Continuous Neutralization (CNS)

Operation :

• Fully automatic operation
• Automatic injection of caustic and acid to neutralize effluent pH
• The neutralization tank’s role as a “buffer tank” smoothes out pH variations caused by acidic or caustic effluents entering the neutralization system.
• The volume of the tank enables a sufficient contact time (30 minutes) to be maintained to generate the chemical neutralization reaction without any residual reaction after pH control.
• The pH adjustment in the tank is automatically managed by the pH probe located in the recirculation loop, which controls the acid and soda injection pump.
• The mixing pump stirs the tank volume with an hourly flow rate of over 5 times its volume, ensuring optimum dilution and mixing of the concentrated chemical solutions injected.
• The control tank is used to take a sample from the neutralization tank to validate the pH value and enable the volume to be drained.
• If the pH is within the correct range, the effluent is discharged. If the pH is out of range, the effluent volume is returned to the neutralization tank for a second treatment.

Options

• Two-phase neutralization: inlet pH between 0 and 14 / precise outlet pH between 6.5 and 8
• Plate heat exchanger for effluents above 60°C
• Inlet for connection to customer’s wastewater
• Dedicated electrical cabinet with HMI
• Dedicated chemical solution tanks