How to choose the high (low) selector in the control circuit?
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High-selectivity or low-selectivity selectors are used in many control loops of the regeneration unit in UOP continuous reforming units. May I ask, dear colleagues, how should one choose between high-selectivity and low-selectivity selectors? Why use it? What are its advantages over other control schemes?
As the name implies, high-selection or low-selection means that the control system always chooses either high or low parameters for output control. The decision on which one to use is determined by the process flow design; it is decided based on the requirements of the process flow. The purpose of this approach is to ensure stable parameter output and relative consistency, thereby guaranteeing stable operation. The advantage is that the parameter for output control can be switched manually via high/low selection, ensuring stable operation under different parameter conditions