Sampling and analysis systems for the water-steam cycle in power plants and process steam generators are state of the art today. Monitoring a wide range of parameters in the water-steam cycle enables the operator to optimize water chemistry and protect expensive investments, such as steam turbines, from corrosion.
In power plants with frequent load changes and fluctuating pressures, technicians usually have to adjust the sample flow manually with a pressure reducing valve. The Dr. Thiedig AutoFlow allows operators to automatically maintain a constant flow rate during changing pressures. The AutoFlow is a prerequisite for the automation of new or existing sampling equipment.
The flow rate can be kept constant at an adjusted set point between 15 and 65 l/h at a process pressure of up to 400 bar.
As in all industries, the trend is towards more automation. Although we strongly recommend that a system used to monitor the entire water-steam cycle in a power plant not only be operated and monitored remotely, there are solutions to automate the operation of the sampling system.
The following solutions are available for this purpose:
Motor valves, solenoid valves or pneumatic valves that can be controlled directly from the control room. E.g. for:
- Shut-off and blow-off valves with actuator
- Temperature protection devices that can either be controlled or shut off according to the stored programs.
Advantages:
- Remote operation and control possible automatically
- Automated temperature protection possible