Position of the four-way control valve for the ethylene cracking compressor
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I recently encountered a difficult problem: regarding the location of the four anti-surge valves in the ethylene cracking unit, should they return from after the caustic scrubber or from before it? I hope to receive guidance from the seniors. . . .
It's better to return behind the tower. Returning from in front of the tower has an impact on the caustic scrubber tower; moreover, the shorter the process flow, the more timely the replenishment at the compressor inlet, and the less likely the compressor is to experience surging.
With different focuses, each has its advantages and disadvantages; depending on the perspective from which the issue is viewed, different choices are made.
Returning from in front of the tower, the shorter the process, the less likely the compressor is to experience surge, right? The return process from behind the tower is really long