How long is the shutdown time for a centrifugal compressor?
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I want to know what the process is for shutting down a reciprocating compressor, and how long it takes approximately I know the rotation speed should drop first, and the pressure will drop as well. Then when should the inlet feeding to the compressor be stopped? How much time is required for the entire process? I am eager to learn from all the engineers!* :)
Search on Baidu; there are detailed procedures for starting and stopping the vehicle.
I’ve looked for it, but there’s no specific timeline associated with it, so I’m not quite clear about the sequence of events in terms of time
Slowly close the outlet valve while slowly opening the vent valve (to release gas; for toxic, flammable, or hazardous gases, a dedicated emission system is used). And at the same time, slowly open the reflux valve. Reduce speed, reduce pressure. Close the outlet valve. After shutting down, close the vent valve, return valve, and inlet valve. Start the barring gear to turn the shaft, but be careful not to let the barring time be too long to avoid wear on the bearing shells.
First, reduce the load and lower the speed, activate the anti-surge valve, then close the outlet and inlet, and start the shutdown procedure.
Are you referring to the time it takes to fall? Five to eight minutes, I guess
Increase the speed first when boosting voltage, and reduce the voltage first when reducing speed. It can generally be stopped within 5 minutes. After stopping, the turbine must be turned until the surface temperature of its casing drops to no more than 50°C above the ambient temperature.
Increase the speed first when boosting voltage, and reduce the voltage first when reducing speed. It can generally be stopped within 5 minutes. After stopping, the turbine must be turned until the surface temperature of its casing drops to no more than 50°C above the ambient temperature.
Once the anti-surge valve is fully open, the machine can be shut down, the inlet valve closed, and the vent opened. The exact time has been calculated before; it’s only a few hours until shutdown
Set the anti-surge control to automatic, inform the process engineers to pay attention to the process parameters, and then reduce the frequency by 5% at a time, generally down to the minimum allowable speed. Then it can be shut down. Emergency stop of the control cabinet, SIS stop, or on-site stop are all acceptable. At the moment of shutdown, the anti-surge valve opens completely on its own. Once the unit stops rotating, close the inlet and outlet valves to disconnect the unit