Two centrifuges in parallel
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In an air separation unit, if a large centrifugal air compressor is in operation and the air volume is insufficient, another smaller centrifugal air compressor is added. How should operations be carried out during startup, shutdown, and normal operation when the two compressors are operated in parallel? I hope friends with this experience can answer, thank you!
Actually, there’s no special operation required; it mainly depends on the outlet settings, such as whether there are designs like check valves to prevent reverse flow
Yes, just follow the normal procedures. The check valve behind the machine is crucial. It is recommended to explain the actual situation on site and share the problems that need to be solved, so as to facilitate targeted discussions.
We have two centrifugal air compressors of the same Elliott model connected in parallel, with identical specifications, and they operate in parallel over the long term. The check valve for discharge is included with the machine. When the load increases and parallel operation is carried out, follow normal procedures. The exhaust volume is high at startup (using a 350 mm pipe equipped with a silencer); it gradually decreases after equilibrium is achieved. Recommendation: Flow rate and pressure must be verified; otherwise, emptying or entry into the surge zone may occur ； Check whether the drain pipe is sufficient.
The two machines can be controlled centrally, provided that the password for the unit is available