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Cooling Water Monitoring
In the industry a lot of water is used to cool installations. Cooling water passes many process installations and heat exchangers. Often treating chemicals are dosed to prevent fouling of these installations or/and against algae’s, shell-fishes, other (marine) organisms. There is a potential risk of contaminating this cooling water so, before exhausting it back into the river, it should be monitored via an on-line analyser. Cooling water can be of different sources/origin such as:
- River water; depending on the season the river water can contain many organism such as algae’s, small water plants, humus etc.. The sample transport, sample conditioning system and the analyser must be selected very carefully.
- Seawater; This is a tricky application because most types of analysers have maintenance and/or analytical problems with salt water. The sample transport system and/or sample conditioning system must be designed very carefully. Many organism in salt water such as shell-fishes will result in fouling of all wetted parts. Furthermore a high salt percentage could interfere the analytical results dramatically.
- Ground water; this is a standard application. The analyser system could be of a basic design.
- Process water; Sometimes surplus water of a process is being re-used for cooling purposes. It could contain all kind of chemicals so the design of the sample conditioning system and the selection of the analyser should be based on the specifications of this specific process. Ask for our process and application questionnaire.
There are several analyser types that are suitable for this application. ODS installed for example:
- TC-analysers. A Total Carbon Analyser typical in a range of about 100 mg/litre will monitor the total of all hydrocarbons and inorganic carbons that are present in the water. It does not see the difference between natural hydrocarbons (already present in the intake water) and chemicals. oils etc.;
- TOC-analysers. A total Organic Carbon analyser. The range normally is low f.e. 100 mg/litre C. (100 ppm). A TOC analyser measures the total of all organic carbons;
- An oil on water detector responds to an oil film. It measures all floating hydrocarbons typically mineral oils and/or hydraulic oils. There are several options: oil on water detectors based on measuring the electric diëlectricum (> 0,3 mm) or based on optical reflection > 0,05 mm);
- Oil in water analysers based on an optical detector via de UV-fluorescence principle. Typical the sensitivity starts from 10 ppb. These systems only respond to polycyclic aromatic hydrocarbons such as benzene. The benzene acts as a tracer in oils such as crude or mineral oil, petrol, fuel etc.
We are pleased to offer you specific information:
Contact ODS and/or Send us your enquiry
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