The dry gas seal of the Chiga cycle hydrogen compressor is damaged; analysis of possible causes
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The dry gas seal was damaged, resulting in excessive primary leakage gas and an interlocked shutdown. After disassembly and inspection by the fitter, it was found that the end faces of the moving and stationary rings of the primary seal were severely worn and needed to be replaced; there were impurities at the spring seat, and the floating C-ring was also worn and required replacement. The secondary seal was also worn, but it could be used again after grinding. Reason for analysis: Caused by impurities in the pipeline ； Impurities in the lean liquid ； The heating temperature of the liquid separation tank at the inlet of the circulating hydrogen compressor is too high, resulting in liquid carried in the circulating hydrogen. Could there be other reasons, according to the experts’ analysis? ? ?
How long is the operation cycle? Has the supply of primary seal gas been stopped?
It was over two years, with a half-year break in between
Dry gas seals are prone to damage; theoretically, the sealing material should last between 4,000 and 8,000 hours. The poster should replace it as soon as possible!
We have encountered situations where damage to the O-rings of the ball valves on the dry gas seal pipelines led to damage to the dry gas seal itself
But why are problems only appearing now, after the catalyst has been in use for so long?
The primary sealing gas must be clean and dry; the dehumidifier should be in proper operation to ensure that no liquid is present
Impurities carried by the sealing gas, high temperature at the compressor’s sealing surface
Given proper quality of the gas supply and pressure within the operational range, the lifespan of dry gas seals should be sufficient to meet the requirements for long-term operation of the equipment, allowing for timely maintenance and replacement. It’s hard to say if the dielectric contains liquid.