- 2025-07-22
Cooling Tower Water Treatment
Core treatment objectives
Control scale index (LSI≤0.5)
Inhibit corrosion rate (carbon steel <0.075mm/a)
Kill microorganisms (total number of heterotrophic bacteria <1×10⁵ CFU/mL)
Key components of the system
Pretreatment unit
Multi-media filter (removal of turbidity>95%)
Weak acid cation exchanger (hardness removal rate ≥85%)
Reverse osmosis system (desalination rate ≥98%, SDI <3)
Water quality stabilization unit
Automatic dosing system (scaling inhibitor/corrosion inhibitor accuracy ±2%)
ORP online monitoring (control range 650-750mV)
Intelligent sewage discharge device (conductivity threshold setting ±50μS/cm)
Sidestream treatment unit
High-speed sand filter (pass Filtration speed 40m/h)
Electronic descaling device (output frequency 5-50kHz)
Ultraviolet sterilizer (dose 80mJ/cm²)
Operation control points
Concentration multiple management
Open system: 3-5 times (Cl⁻ balance method control)
Closed system: 5-8 times (softening and desalination are required)
Microbial control
Alternate addition of oxidizing/non-oxidizing bactericides (switch weekly)
Biological sludge control <3mL/m³
Technical benefit indicators
Heat exchange efficiency improvement: condenser tube fouling thermal resistance <3.5×10⁻⁴ m²·K/W
Extended equipment life: copper tube corrosion rate <0.005mm/a
Water-saving efficiency: 97% less water replenishment than DC cooling system
Customized design elements
Material adaptation:
Molybdenum corrosion inhibitor is used in stainless steel system
Copper corrosion inhibitor is required in carbon steel system
Operation mode:
Zero sewage discharge scheme (coupled crystal softening + membrane concentration)
Heat recovery system (enabled when temperature difference >8℃)
