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Online remediation of a cooling water circuit

Removal of hydrocarbons from the cooling water circuit by means of de-oiling and filtering
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Online remediation of a cooling water circuit

France

The cooling water system of a power generation site had become contaminated with hydrocarbon pollution.

This circuit, with a volume of 180 m3 (234 yd3), had a total oil and grease concentration of 320 mg/l with a maximum target of 10 mg/l, i.e. a target decrease of 97 %. The objective was to intervene effectively on this circuit without stopping production.

CTP environnement's solution consisted of diverting a fraction of the flow to a temporary treatment plant, then reinjecting the treated water into the refrigeration circuit.

The diverted flow, of the order of 1 m3/h (4,4 gpm), is insignificant for cooling; this meant the operation was possible without disruption to the system.

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The temporary treatment system deployed by CTP environnement consisted of an oil separator, a bag filtration stage, and a finalising stage on activated carbon.

This system allows a widespread reduction of the total, soluble and insoluble, oils and grease.

The installation, fully automated and secure, also allowed an exceptionally economical and continuous 24h/24, 7d/7 treatment.

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Key project figures :

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