Associations:
Closed Loop Systems
- are typically found in production plants &comfort cooling operations
- are generally built into structures and the level of access is limited
- have high repair costs due to their location and potential for disruption of services
- risk extensive damage due to failure of piping if not maintained
- operate with a low water loss (<10%annum on system volume)
The Objectives of the Treatment Program
- to support sound mechanical design
- to inhibit corrosion on the various metals that arepresent
- to prevent deposition of hardness salts and corrosion products
- In the case of existing systems they should help to move deposits to allow the inhibitors to reach the system metal
Typically a sound treatment program has four functions -
- Ferrous alloy inhibitors designed to protect mild steel
- Yellow metal inhibitors designed to protect copper and alloys
- Buffering Agents to control system pH
- Dispersants to disperse solids
Well managed systems operate for very long periods without issue, if water losses occur & are unnoticed, severe corrosion & fouling can occur.
Cleaning can be achieved online by -
- Relying on corrected treatment to slowly remove corrosion or scale and capture them by filtration of the circuit
- On-line cleaning with surfactant/polymerto remove organic deposits and capture them by filtration of the circuit
- On-line cleaning using elevated levels of phosphonate & polymer to remove corrosion product
Figure 1 - Example of Industrial plant CC. Heat is exchanged via cooling coils in Cooling Towers
Figure 2 - Brine Closed Circuit Beverage Plant
Figure 3 - Example of poorly maintained HW boiler, tubes completely failed, boiler retubed
Figure 4 - Critical equipment/heat exchange areas are nominated & coupon racks positionedContact us today to find out more!
