Cooling Water Treatment
Industrial Cooling Tower & Heat Exchanger Chemical Dosing
Application Overview
Industrial cooling water systems — including open recirculating cooling towers, closed loop systems, and once-through cooling — require continuous chemical treatment to prevent scale, corrosion, and biological fouling. Precise dosing of scale inhibitors, corrosion inhibitors, and biocides, combined with continuous monitoring of conductivity, pH, and ORP, is essential for maintaining heat transfer efficiency and system longevity.
Key Challenges
- Precise dosing of scale inhibitors, corrosion inhibitors, and biocides at variable makeup water flow rates
- Conductivity-based blowdown control to maintain cycles of concentration
- pH and ORP monitoring for biocide efficacy and corrosion control
- Legionella risk management through continuous biocide residual monitoring
- Makeup water and blowdown flow measurement for water balance calculations
- Chemical compatibility with treatment chemicals including oxidizing biocides
Key Monitoring Parameters
- Conductivity / TDS
- pH / ORP
- Free Chlorine / Biocide Residual
- Makeup Water Flow Rate
- Blowdown Flow Rate
- Cycles of Concentration
Need a Custom Solution?
Our engineers can design a complete instrumentation package for your specific process requirements.
Contact Engineering TeamProducts for Cooling Water Treatment
Solenoid Diaphragm Metering Pump
Proportional dosing of scale inhibitors and corrosion inhibitors based on makeup water flow
Mechanical Diaphragm Metering Pump
Continuous dosing of biocides and dispersants in large cooling tower systems
Conductivity Sensor
Conductivity monitoring for automatic blowdown control and cycles of concentration management
pH / ORP Sensor
pH and ORP monitoring for corrosion control and biocide residual verification
Electromagnetic Flowmeter
Makeup water and blowdown flow measurement for water balance and chemical dosing control
Process & Instrumentation Overview
Electromagnetic flowmeter measures makeup water flow rate to trigger proportional chemical dosing.
Metering pumps inject scale inhibitors and corrosion inhibitors proportional to makeup water flow.
Timed or ORP-controlled biocide dosing to maintain microbiological control and Legionella prevention.
Conductivity sensor triggers automatic blowdown valve to maintain target cycles of concentration.
Continuous pH and ORP measurement verifies chemical treatment efficacy and corrosion protection.
Chemical Dosing Points
| Dosing Location | Chemical | Recommended Equipment | Purpose |
|---|---|---|---|
| Cooling Tower Basin | Scale & Corrosion Inhibitor | Solenoid Diaphragm Metering Pump (H+ Series) | Continuous dosing proportional to make-up water flow |
| Cooling Tower Basin | Biocide (Oxidizing / Non-oxidizing) | Solenoid Diaphragm Metering Pump (H Series) | Intermittent biocide dosing on timer or ORP control |
| Make-up Water Line | Antiscalant | Mechanical Diaphragm Metering Pump (HJ-L Series) | Prevent scale formation in heat exchangers |
| Blowdown Line | None | Electromagnetic Flowmeter | Monitor blowdown rate for concentration ratio control |
Water Quality Monitoring Points
Conductivity Sensor + Electromagnetic Flowmeter
pH/ORP Sensor + Conductivity Sensor
Conductivity Sensor + Flowmeter
Temperature Sensor + Flowmeter
Typical System Configuration
Information Required for Solution Design
To provide an accurate system recommendation, please prepare the following information before contacting our engineers:
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Frequently Asked Questions
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