In ongoing operation, the substances suspended in the boiler water are concentrated. In order to avoid the negative consequences (foaming, deposits) of excessive salt content in the boiler water, specified limit values must not be exceeded. With the aid of a desalination control valve, boiler water with concentrated content is constantly removed and replaced with clean water. If the limit values are exceeded, the conductivity limitation ensures prompt switching off of the burner(s). Foreign substances that have sunk to the bottom of the boiler are removed by briefly opening a drainage valve.
By IGEMA GmbH based in Münster, GERMANY.
Secondary Air Flow Overview: The need for accurate, repeatable & reliable combustion air measurements in power generation plants is critical to efficient operation and safety throughout the entire facility and processes. Accurate secondary air flow measurement to the burners is critical for maintaining the proper air to fuel ratio, resulting in more complete and stable combustion, better performance and lower emissions. Coal-fired power plant applications pose a number of challenges to obtaining these critical flow measurements including large ducts, limited metering runs, poor velocity and temperature profiles, vibration and high temperatures.
By Kurz Instruments, Inc. based in Monterey, CALIFORNIA (USA).
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