Does an propylene refrigeration compressor require DCS control to adjust its speed?
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For low-temperature methanol washing units and propylene cooling systems, is it necessary for the propylene cooling compressors to have DCS control to regulate their speed?
Now, ITCC is used to control more units
It is necessary; manual speed setting can be used, or the speed can be controlled via cascade control of the inlet pressure.
Ours is also controlled by ITCC, and it is generally adjusted based on low-temperature methanol washing