ANALYSE DES PROCESSUS

Systèmes de traitement de l’eau

Water Treatment Systems

Thermal power plants consume high volumes of water, and they need to discharge wastewater coming from the following processes:

Reverse Osmosis (RO) concentrate and RO cleaning fluids
Wastewater from ion exchanger regeneration
Cooling tower blowdown and boiler cleaning waste water
Wastewater from flue gas desulfurization and wet scrubbers
Ash pond overflow, coal storage run off
Oily wastewater from oil storage (oil fired power plant)

Keyfacts Application

Sector

Water Treatment of Wastewater coming from different Processes

Application

3 Applications

Checking dissolved Oxygen DO
Checking pH and Conductivity
Checking Conductivity

at several measuring locations

Measured Parameter

pH, Cond and ORP

Key Requirements

High levels of impurities that must be removed
Regulatory requirements for wastewater disposal

Measuring in Wastewater and Ash Slurry

Application Description

In the following, we will describe typical process steps and measuring locations in pretreatment of wastewater and final effluent control before discharge to the environment.

Application 1:
Wastewater from the power plant is sent to the clarifier to be neutralized with lime. This process creates a significant amount of build-up over time.

Application 2:
After neutralization, the wastewater is treated in an aeration tank by microorganisms. Dissolved oxygen is measured to control the aeration.

Application 3:
The water leaving the treatment plant must be within a pH range of 6.5 to 7.5 to ensure environmental requirements are met.

Application 4:
The water in the Ash Pond must be within a pH and ORP range to ensure the plant is meeting the environmental requirement.

Application Requirements

The high proportion of solids in water is a challenge for pH sensors, which can easily become clogged.
Disposal or discharge of wastewater is subject to regulatory limits that must be monitored and documented.

Why Knick ?
Wastewater usually contains suspended solids – we offer sensors for these demanding conditions and sensor maintenance systems for automatic cleaning. Furthermore, Memosens technology ensures interference-free measurements even in dirty and humid environments and at long distances.

Produits correspondants

SE571 pH Sensor | Memosens | 225 mm | Ex | For demanding applications in the chemical industry

Réf. produit :

SE571X/2-NMSN

SE740 Optical Oxygen Sensor | M12 (8 pins) | 325 mm | For demanding hygienic environments

Réf. produit :

SE740/3

SE555 pH Sensor | VP | 425 mm | Ex | Sterilizable | For aggressive media

Réf. produit :

SE555X/4-NVPN

SE564 ORP Sensor | Memosens | 325 mm | Ex | For highly contaminated media with pressure fluctuations

Réf. produit :

SE564X/3-NMSN

SE554 Sonde de pH | VP | 225 mm | Ex | Pour les milieux à très haute force ionique

Réf. produit :

SE554X/2-NVPN

ARD50 Immersion Fitting | Modular | PP-H or PVDF | One Sensor

Réf. produit :

ARD50

ARD75 Immersion Fitting | Modular | PP-H or PVDF | Up to three sensors

Réf. produit :

ARD75

Stratos Multi E461N Multiparameter Transmitter | Memosens/Analog Sensors | 2-Channel | PROFINET | 2x 4…20 mA Outputs

Réf. produit :

E461N.010

Industries et applications connexes

Énergie

Les centrales électriques utilisent l’eau dans de nombreux process aux exigences très différentes, p. ex. pour la production de vapeur, le refroidissement et l’épuration des fumées.

Systèmes d’échange d’ions

Mesure du pH, de l’oxygène dissous et de la conductivité dans l’eau d’alimentation de chaudière, la vapeur et le condensat dans les turbines à gaz des centrales électriques à cycle combiné.

Circuits d’eau d’alimentation de chaudière

Mesure du pH, de l’oxygène dissous et de la conductivité : des paramètres essentiels dans un circuit d’eau d’alimentation de chaudière.

Systèmes d’eau de refroidissement

Mesure du pH, du potentiel redox et de la conductivité de l’eau de refroidissement, qui doit continuellement être traitée avec des acides et des biocides.

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Since steam generator functions are critical to applications and their downtime or replacement is extremely cost intensive, it is important to avoid damage due to wear...

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Measuring of pH in pre-Scrubber, in neutralization and in lime scrubber within the flue gas desulfurization process in power plants.

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Measuring of pH, dissolved oxygen and conductivity in boiler feed water, steam and condensate in combined cycle gas turbine in power plants.

Power Industry Brochure

Overview of energy-specific applications and product solutions

Download now

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