Problems of anti-freezing and anti-condensation for the cold hydrogen line in winter reactors
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Due to internal leakage in the check valve before the cold hydrogen line enters the reactor, oil flowed back to the cold hydrogen control valve, resulting in freezing of the cold hydrogen line in winter and preventing it from functioning properly. Our approach is to slightly open the cold hydrogen control valve to prevent condensation in the hydrogen flow pipeline ； Alternatively, wrap the cold hydrogen lines with steam tape for heat tracing to prevent condensation. Do you have any good solutions when this phenomenon occurs in your device?
Under normal circumstances, cold hydrogen does not require heating, and the additional measures taken are unnecessary, as it comes directly from the compressor outlet at a pressure higher than that in the reactor; it is only necessary to quickly close the cold hydrogen valve during shutdowns
Yes, by setting the cold hydrogen valve at the upper limit on the DCS and maintaining a certain degree of opening, freezing will not occur.
I think it’s better to have a certain degree of openness; it’s troublesome if it freezes.