Measuring in Wastewater and Ash Slurry
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)
Water Treatment of Wastewater coming from diffrent Processes
Sector
3 Applications (1. Checking dissolved Oxygen DO, 2. Checking pH and Conductivity, 3. Checking Conductivity) at several measuring locations
Application
pH, Cond and ORP
Measured Parameter
Key Requirements
![Water-Treatment-Systems-800x533 Water Treament of Wastewater](https://www.knick-international.com/wp-content/uploads/2021/10/Water-Treatment-Systems-800x533-1-300x200.jpg)
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.
Requirements of Application
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.
Solution - Product Highlight
Features
- Dual channel any parameter
- Advanced diagnostics
- Memosens technology
- NAMUR status indications
- Hart, ProfiNet and EtherNet/IPcommunication options
Customer Benefit
- Small footprint due to double channel, split display
- Sensor diagnostics and alarm indication and transmission
(for Application 1)
Features
- Up to 130 °C, up to 12 bar
- PTFE ring junction
- Ag/AgCl, incl. silver ion trap and salt reservoir
- No contamination or blocking of thejunction
- Memosens technology
Customer Benefit
- Long lifetime even in harsh conditions
- Remote calibration
- Sensor/cable connection can be submerged in water (Memosens)
- SE571 annular junction resists fouling
(for Application 2)
Features
- Luminescence technology (optical)
- Range: 4 ppb to 25 ppm
- Digital communication to meter
- Maintenance by basic cleaning or replacement of cap
- No electrolyte required
Customer Benefit
- High accuracy
- Low maintenance
- Easy to calibrate
(Application 3)
Features
- Up to 135 °C, up to 6 bar
- Ceramic junction
- Viscous gel filling
- For aggressive media
- Memosens technology
Customer Benefit
- Long lifetime even in harsh conditions
- Remote calibration
- Sensor/cable connection can be submerged in water (Memosens)
(Application 4)
Features
- Up to 130 °C, up to 10 bar
- 2x open hole
- Solid polymer
- Sensor element: Platinum plate
- For heavy industrial application with a lot of impurities and precipitations
- Memosens technology
Customer Benefit
- Long lifetime even in harsh conditions
- Remote calibration
- Sensor/cable connection can be submerged in water (Memosens)
(Application 4)
Features
- Up to 130 °C, up to 10 bar
- 2x open hole
- Solid polymer
- For heavy industrial application with a lot of impurities and precipitations
- Memosens technology
Customer Benefit
- Long lifetime even in harsh conditions
- Remote calibration
- Sensor/cable connection can be submerged in water (Memosens)
(Applications 1-3)
Features
- Robust immersion fitting with high flexibility
- Wall mounting brackets
- Rinse function
- Wetting cup
- Various sensor adapters
- Available in PP-H and PVDF
- High chemical and temperature resistance
- Up to 250 cm immersion depth
Customer Benefit
- Unique design for easy maintenance in combination with Memosens technology
(Application 4)
Features
- Robust immersion fitting with high flexibility
- Wall mounting brackets
- Rinse function
- Wetting cup
- Various sensor adapters
- Available in PP-H and PVDF
- High chemical and temperature resistance
- Up to 250 cm immersion depth
- For up to three sensors
Customer Benefit
- Unique design for easy maintenancein combination with Memosens technology