Recondenser process and control system of Shandong LNG Terminal

Recondenser is the core equipment of recondensation process at LNG terminal. It can condensate the BOG generated in the system, and also act as a buffer tank at the high-pressure pump suction. Therefore, recondenser process and control play a vital role for stable operation of the terminal. Through the exposition of recondenser process and major parameters of Shandong LNG Terminal, four main functions of the control system are analyzed briefly. And on this basis, two improvement schemes for optimizing the recondenser control system are put forward: (1) in view of process, bypass line and control valves should be set from high pressure pump minimum reflux to the tank to ensure the stable operation of recondensation process and receiving terminal; and (2) in view of control, flowrate monitoring and control should be set on high pressure pump minimum reflux line to guarantee that pressure and liquid level fluctuation triggered by material imbalance would not occur in recondenser.