Abstract:  The polymer blockage in the process water stripping tower of the 220 kt/a ethylene plant at PetroChina Dushanzi Petrochemical Company serious affected the long-cycle and stable operation of the tower. By analyzing the reasons, the process operation was optimized and process water scale inhibitor was added to reduce the oil content of water and inhibit the formation of polymer, so as to improve the water quality of process water stripping tower and reduce the risk of plant shutdown caused by polymer blockage, laying a solid foundation for the long-cycle and optimal operation of the quench system of ethylene plant at full load.

Key words:  ')">

 , process water, emulsion reaction, polymer blockage, optimization measure