New hydrogen compressor for hydrogenation unit

The inlet and outlet valves should be opened first; the unloader is used to adjust the load, and it is adjusted during startup. The load should be kept at 0 before starting up (if it has a variable-speed control system, then the oil pump of that system should be started before beginning operation). The return line is used to control flow. Adjusted according to the export volume. After shutting down the machine, stop the oil pump of the variable speed control system, and finally close the inlet and outlet valves. Generally, the outlet is closed first; if there is no maintenance, the inlet does not need to be closed.

Reciprocating compressors generally require starting or stopping the unit under zero load conditions. I. The startup procedure for our new hydrogen compressors (reciprocating type) is as follows: 1. The circulating water, lubricating oil, oil injector, machine cooling water, as well as the electrical instruments, all must be in normal condition ； 2. Close the main inlet and outlet valves ； 3. Secondary and tertiary return lines are fully open; primary return line is closed ； 4. Place the unloader at 0% position ； 5. Use the safety valve bypass to relieve pressure to below 0.2 MPa ； 6. After turning the shaft, an approval signal for startup is given indoors, and the unit is started on-site ； 7. After observing on-site that the unit is operating normally, activate the first-stage return line and open the inlet main valve to introduce fresh hydrogen into the compressor system ； 8. The unloader is adjusted from 0% to 50% and 100% ； 9. Adjust the third-stage return line (make sure that the compression ratio for each stage does not exceed the allowed limit), so that the pressure at the outlet of the compressor’s third stage is slightly lower than the pressure in the reaction system ； 10. Open the main outlet valve to integrate the compressor into the system ； 11. Adjust the compression amount of fresh hydrogen based on its required quantity and the compression ratios at various stages. II. The shutdown procedure for the new hydrogen compressor is as follows: 1. Gradually reduce the unloader from 100% to 0% ； 2. Gradually close the main outlet valve ； 3. Gradually fully open the third-level return line ； 4. Close the main inlet valve ； 5. Use the safety valve bypass to relieve pressure in the compressor system ； 6. Stop the unit by operating the on-site control column ； 7. Start the unit’s barring gear after shutdown. Let’s discuss this together, fellow sailors, to see if there are any issues! I hope everyone will not hesitate to share their insights!

Thank you, Floor 3, for the detailed explanation on starting and stopping the compressor!

Our new hydrogen compressor also features three-stage compression, so starting and stopping it isn’t as troublesome as you said

Starting with the cranking process: 1. For cranking, the operator checks whether the status displayed on the ITCC cranking device is normal. 2. The HydroCOM system is activated; the pressure is within the required range. 3. The flow path is established by opening the inlet valve. 4. The liquid level in the inter-stage separation tanks is set to automatic control. 5. The valve positions are set as follows: 3-return-3 to 100, 1-return-1 to 100, and 2-return-2 to 100. 6. The outlet electric valve is opened. 7. The ITCC system is reset, all interlocks are activated, and the signals are normal. 8. Pre-startup phase: the oil pump and injector are started, with a 180-second countdown. 9. The motor is started on-site; the valve position for 3-return-3 is set to 100. 10. Loading begins

Everything mentioned upstairs is very detailed. . .