pH adjustment stabilizes process media within required ranges to meet industrial needs, such as controlling plating bath pH in electroplating, slurry pH in metallurgical flotation, and mother liquor pH in chemical processes. In water treatment, the pH of treated water significantly impacts chemical efficacy, and post-treatment wastewater may fall outside permissible pH discharge limits.

Acid-base pH dosing systems are widely used across industrial water treatment. In aqueous solutions, hydrogen and hydroxide ions maintain a fixed product known as the water ion product constant. pH adjustment alters water quality by modulating these ion concentrations.

Applications‌:

Electroplating wastewater
Pigment production
Textile dyeing wastewater treatment
Cooling water systems
Chemical processes (reactors)

System Operation‌:
Online pH controllers detect liquid pH, convert setpoint ranges into current signals, and transmit them to automated dosing pumps. These pumps (calibrated for signal/frequency ranges) automatically adjust chemical feed rates based on received signals.

Critical Components‌:

Precision Dosing Pumps‌:
Microprocessor-controlled diaphragm pumps safely adjust dosing volumes using feedback signals (4–20 mA) from pH analyzers. Enable precise acid/alkali addition and automatic start/stop via liquid level detection.

pH Controller‌:
Features multi-mode control (P, PI, PD, PID) for process stability. Displays pH readings, commands pump operation, and maintains setpoint values through real-time monitoring and feedback-driven pump control. pH sensors transmit accurate measurements to the controller.

Industrial pH Electrodes‌:
Crafted with advanced glass-blowing techniques, these sensors offer:

Low impedance
Minimal deviation in extreme pH (<1 or >12)
Temperature-change resistance
Ensure precise signal transmission to controllers.

Liquid Level Control‌:
Monitors chemical storage tanks, triggers alarms during low-level conditions, and halts pumps to prevent dry running.

Chemical Storage Tanks‌:
Dedicated tanks (100–5,000 L capacity) with preconfigured mounting points for precision dosing equipment.

Automated Control System‌:
Comprises PLCs, frequency converters, and touchscreens. Utilizes PID algorithms to stabilize pH based on sensor inputs.