Is it necessary to interlock the shutdown when the inlet steam temperature of the turbine changes?
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As the title suggests, the process engineers are requesting that an interlock shutdown be implemented when the steam temperature at the turbine inlet is below 350°C. In the turbines I’ve worked with before, such an interlock was not available. Is it then necessary to have an interlock shutdown for the turbine inlet steam temperature?
The temperature is low; what’s there to worry about as long as there’s enough airflow?
It is said that the temperature is too low, and there is a concern that steam carrying water might damage the impeller.
With a steam engine, it’s obvious right away that there’s no need to check the temperature.
The systems we used in the past didn’t have this interlock, and now the catalysis workshop is requesting that it be added. Personally, I don’t think it’s necessary, but I’m not sure what reason to give to the process engineers.
Just add an alarm – such interlocks are not necessary. It’s still possible to operate it even with water present; in normal cases, draining water at the bends in steam pipes prevents water from remaining there
For changes to the interlock system, approval procedures are required; after the person who proposes the change, the workshop, and the chief engineer in charge of production sign off, the instrumentation can be added. Instruments are meant to serve the process; there’s no need to find reasons for refusal.
The staff in the production workshop all agree; they have submitted it to the company’s chief engineer, who has asked us to discuss whether it is necessary. It is currently at the discussion stage.
. . . I did all the interlocking systems myself; I got suggestions regarding the technology, but the boss didn’t get involved. From the start, it was the design institute’s responsibility, the installation phase was handled by the equipment suppliers, and we took care of everything later on
It’s no big deal, just add it. When there is liquid involved, it’s not just about temperature.
It’s actually not necessary; if the temperature does drop, simply stop the machine manually. It then depends on the operator to monitor the situation. If it’s necessary to add additional sensors, at least two thermometers should be used for comparison – otherwise, a malfunctioning thermometer could cause the machine to stop, which would be counterproductive!