Sampling and analysis systems for the water-steam cycle in power plants and process steam generators are state of the art today. Monitoring a large number of parameters in the water-steam cycle enables the operator to optimize the water chemistry and protect expensive systems 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 using a pressure-reducing valve. With the Dr. Thiedig AutoFlow, users can automatically keep the flow rate constant in the event of pressure fluctuations. The AutoFlow is a prerequisite for the automation of new or existing sampling systems. The flow rate can be kept constant at an adjustable setpoint 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 for monitoring the entire water-steam cycle in a power plant is not only operated and monitored remotely, there are solutions for automating the operation of the sampling system.
The following solutions are available for this purpose: Motorized valves, solenoid valves or pneumatic valves that can be controlled directly from the control room. For example:
- Shut-off and blow-off valves with actuator
- Temperature protection devices that can be optionally controlled or switched off according to stored programs.
Advantages:
- Remote control and control automatically possible.
- Automated temperature protection possible.