1-In the original design, the source of pure hydrogen for start-up and shutdown was from cylinders at 110 bar and to draw from 110 to 15 bar some modifications were necessary to do.
Until now we have not done.
2- The startup procedure, is as your describtion.
3- The switch from N2 to H2 is...
Agree with you because in the initial design the gas seal start-up and shutdown was Hydrogen (82% H2 purity) at 15 kg/cm2G and for unknown reasons they changed to the N2.
Following chart, which simply shows, different operating modes of the compressor, in order to ensure availability of external...
I try to give you more details
- Seal arrangement: Tandem with int labyrinth / bidirectional.
- Driver type : steam turbine with slow roll condition
- For primary seal, we use N2 for startup and shutdown, and H2 from 2 nd stage of compressor in normal operation.
- For secondary seal, we use...
Hi everybody;
Please help us; we have a new (03 years old) H2 recycle gas compressor for reforming unit equipped with dry gas seals (DGS). For 3 times, when we shut down the plant and we restart again, the DGS fail (high pressure in the primary vent) it mean the primary seal is failed, so, we...
