Discussion on Operation Issues and Optimization Measures of Rapid Cooling System
800 kt·a-1 Ethylene unit in a petrochemical company uses patented technology from the US-based S&W company,operates with a designed annual operating time of 8 000 h.The plant's operational flexibility ranges from 60%to 110%.In this paper,issues in the quench system were discussed,including high dry point of cracked gasoline,frequent leaks in the dilution steam generator,and leaks in the first-stage cooling of the quench water.By employing methods such as data modeling,pressure-pH analysis,scanning electron microscopy,and metallographic analysis,the root causes of these problems were identified.Technical suggestions were presented,such as adjusting the side-stream extraction rate of the quench tower,implementing a pH value advanced process control system,adding a toluene extraction unit for the process water,applying an external boron infiltration process to the outer tube wall,and introducing anodic protection in heat exchangers,in order to enhance the stability and long-term performance of the quench system.
万方数据
维普
