Inlet flow rate at the start-up of a centrifugal compressor
Thread Content
When the centrifuge is started, must the inlet flow rate be greater than its surge flow rate for it to operate? When the anti-surge device is activated and the inlet flow rate is still low, is surge about to occur at this point?
It is related to the prime mover; if it is a motor that starts the system, the inlet valve should be opened slightly to prevent backpressure. The outlet vent valve should be opened (if the medium is a hydrocarbon, then the anti-backflow valve should also be opened), while the outlet valve itself remains closed； If the turbine is started, the inlet valve is fully open, the reverse flow valve is also fully open, and the outlet valve is closed.
When the centrifuge starts, the anti-surge valve is fully open and the inlet valve is slightly open; the inlet valve is gradually opened to increase the flow rate according to the surge performance curve. Once the inlet valve is fully open, the current and oil temperature remain stable, after which the anti-surge valve is gradually closed until it is fully shut
What was said upstairs is very detailed; I’ve learned from it