Can the pressure difference in the balance pipe not meet the startup conditions when starting the hydrogen circulation compressor?
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This post was last edited by libingtaoff8 on 2016-12-21 10:38. What should be done if the pressure in the balance pipe does not reach the required level when starting the hydrogen circulation compressor? The hydrogen circulation pump is driven by a turbine, and a pressure difference of more than 50 kPa is required. At startup, the system pressure is 4.5 MPa; during normal operation, it is around 11.3 MPa! The booster pump starts when the pressure is low and stops when it is high; since the start-up signal cannot be sent, the turbine cannot be started! I need expert advice: after removing the manual valve behind the differential pressure gauge, the differential pressure can be increased, but sometimes the booster pump does not start, resulting in insufficient flow of seal gas at the first stage, which can easily damage the dry gas seal! Do any sea friends have any good suggestions! The conditions for startup are met; the dry gas seal is a three-stage series dry gas seal with a labyrinth design from Sichuan Nikki! The main sealing gas is fresh hydrogen!
Use a bypass for the control valve to facilitate the transition.
If the pressure of the new hydrogen remains unchanged, the system pressure will decrease a bit; ask the manufacturer what pressure level is allowed for the unit to operate.