Project Scope:
The project includes the construction of a world-scale petrochemical and liquefied gas tank terminal in harbor area of Ain-Sokhna (Egypt). This terminal will serve as the main supply to the Egyptian network for gasoil & LPG which will include:
Three gas oil tanks, with a total capacity of 100 000 m3
Three Liquefied Petroleum Gas (LPG) tanks, with a total capacity of 150 000 m3
4.3 km LPG pipeline
37.5 km gas oil pipeline connecting to the national grid through Mina Sadat
Related infrastructure.
The Liquid Bulk Terminal will also berth the first floating storage and regasification unit, with a storage capacity of 170 000 m3.
Process:
BOG circuit – Vapour:
The fluid conditions (temperatures and pressures) described below are based on the propane case fluid mix and generally describes tank T-601 system. Each storage tank (T-601, T-602, and T-603) are provided with its designed BOG system. All three BOG systems are identically and are designed to compress, condense and sub cool the BOG from an LPG storage tank, or propane storage tank or butane storage tank.
Note: Propane fluid mix is not pure propane and different to the refrigerant propane.
Refrigerant circuit – Vapour:
The circuit is a closed loop refrigeration circuit using propane as the refrigerant. Liquid propane boils in the sub coolers E-621, E-622 and E-623 to cool condensed BOG liquid. The propane vapour (0.10 barG and -40˚C) passes through suction drums V-641, V-642, V-643 to remove liquid droplets.
A stream of saturated refrigerant vapour (0.10 barG and -40˚C) flows from three horizontal suction drums V-641 / V-642 / V-643 into the low-pressure suction port of four x 35% compressors C-621 / C-622 / C-623 / C-624.
Our Solution:
Four Redundant Siemens S7400H PLC System with four HMI Stations and Bentley Nevada Vibration Monitoring Racks.
