Pressure control in the high-pressure depropanization column in the ethylene pre-depropanization process
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In the pre-depropanization process, the pressure control of the high-pressure depropanization column is achieved solely through the fourth/fifth stages of the compressor; is the pressure of this column stable during operation?
Of course it can be stabilized; otherwise, such a design wouldn’t exist. While driving, certain pressure fluctuations occur due to the opening of the compressor’s minimum flow return.