ANALYSE DES PROCESSUS

Systèmes d’eau de refroidissement

Cooling Water Systems

In a thermal power plant, an effective cooling system is needed to transform the used steam after turbine into liquid condensate (condenser). A complex chemical water treatment is required for cost-effective operation of the cooling system. Cooling towers are expensive in investment and running cost and need to be maintained properly in order to avoid costly shutdowns of the complete power plant. The main problems are scaling, corrosion and biological growth from algae and bacteria.

Énergie

Keyfacts Application

Sector

Power Plants operating Combined Cycle Mode

Application

3 Applications (1. Checking dissolved Oxygen DO, 2. Checking pH and Conductivity, 3. Checking Conductivity) at several measuring locations

Measured Parameter

pH, Cond and ORP

Key Requirements

Scaling, corrosion and biological growth from algae and bacteria.

Acid and biocides in the medium.

Measuring in Cooling Water

Application Description

Application 1:
Acid is added to dissolve carbonates before they can block the system, controlled by pH measurement.

Application 2:
A biocide (e.g. hypochlorite) is added to prevent algae and bacteria growth which will block the system, controlled by an ORP measurement.

Application 3:
From time to time, a „blowdown“ needs to be performed. Highly contaminated cooling water will be replaced by clean water to reduce the concentration of the chemicals, controlled by a conductivity measurement.

By using Knick contactless and inductive Memosens technology, many maintenance problems resulting from humidity and corrosion can be avoided. Remote calibration of sensors in laboratory and simply swap sensors at side will help to the operators to run the system smoothly without difficult and time consuming on site calibration.

Requirements of Application

Scaling, corrosion and biological growth from algae and bacteria.
Acid and biocides in the medium

Why Knick ?
Knick offers an extensive modular system for fittings with highly resistant materials against corrosion and suitable sensors for these demanding conditions. Multipurpose use of Stratos Multi, allows different parameters to be monitored with the same equipment.

Produits correspondants

SE555 pH Sensor | VP | 225 mm | Ex | Sterilizable | For aggressive media

Réf. produit :

SE555X/2-NVPN

WA130 SensoGate Retractable Fitting | Modular | Pneumatic | For Uniclean and Unical

Réf. produit :

WA130

Stratos Multi E401N Multiparameter Transmitter | Memosens/Analog Sensors | 1-Channel | 2x 4…20 mA Outputs

Réf. produit :

E401N

Industries et applications connexes

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Power Industry Brochure

Overview of energy-specific applications and product solutions

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