Measuring in Boiler Feed Water, Steam and Condensate
Many modern power plants are operated in the combined cycle mode. In the first step, a gas turbine produces electricity. The hot off gas from the gas turbine is fed into a conventional thermal boiler system with another steam turbine, resulting in a very good overall efficiency. In the above schematic, the measuring locations for pH, Cond and DO are highlighted.
Power Plants operating Combined Cycle Mode
Sector
3 Applications (1. Checking dissolved Oxygen DO, 2. Checking pH and Conductivity, 3. Checking Conductivity) at several measuring locations
Application
pH, Cond and DO
Measured Parameter
Key Requirements
![Combined-Cycle-Gas-Turbine-800x534 Power plant with Combined Cycle Gas-Turbine CCGT](https://www.knick-international.com/wp-content/uploads/2021/09/Combined-Cycle-Gas-Turbine-800x534-1-300x200.jpg)
Application Description
Monitoring of Boiler Feedwater Limits according to EPRI (Electric Power Research Institute/USA), ASME (American Society of Mechanical Engineers/USA), NEM (NEM Energy (Siemens)/The Netherlands), VGB (German organization of power plant operators) and TÜV (German technical approval organization) Guidelines.
Why Knick ?
Due to many years of experience in process analysis in the energy industry and a wide range of suitable products, such as flow-through fittings, compact transmitters for DIN-Rail and multi-purpose use of the same equipment, Knick is able to adapt simple and cost-effective solutions to the requirements of measuring points.
Solution - Product Highlight
Features
- Compact design and cost saving
- Single and dual channel
- MemoSuite technology
- Optional Modbus output
Customer Benefit
- Cost effective solution for many measuring locations
- Easy remote calibration by using the MemoSuite software
(for Application 1)
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
(for Application 2)
Features
- Designed for low conductivity
- Viscous gel filling
- Inbuilt KCl reservoir
- Memosens technology
- 3 x ceramic junction
Customer Benefit
- No external KCl reservoir needed
- No contact problems due to Memosens technology
2-Electrode Conductivity Sensor SE604
(for Application 2 and 3)
Features
- 0.04 … 1,000 μS/cm
- Stainless steel 1.4435, PEEK insulator
- Up to 120 °C and 25 bar
- Available with Memosens technology
- Easy cleanability due to removable outer electrode
Customer Benefit
- Lowest measuring range
- Suitable for high pressures and temperatures
- Remote calibration by Memosens protocol
Features
- Robust flow through fitting in stainless steel
- Various sensor and process connections
Customer Benefit
- Accurate measurement
- Suitable for high temperatures and high pressures