茂名石化2#丁二烯装置气体压缩机机械密封改造

茂名石化80万吨/年乙烯改扩建工程的关键进口机组J-201在密封国产化以后,长期存在寿命短、故障率高的问题,严重影响装置正常生产、累积造成很大经济损失。经过技术路线分析和设计理论计算,判断该机械密封的主要问题是机封参数设计不合理。通过改变该机械密封设计参数,降低密封面发热及增大端面正常泄漏量,成功大幅延长机械密封寿命。

Improvement of Gas Compressor Mechanical Seal for No.2 Butadiene Unit of Maoming Petrochemical Company

After the localization of the mechanical seal of the key imported gas compressor J-201 of 800000 t/a ethylene reconstruction and expansion project of Maoming Petrochemical Company,for a long time,there are problems of short life and high failure rate,which seriously affect the normal production of the device and cause great economic losses. Through technical route analysis and design theoretical calculation,it is concluded that the main problem of the mechanical seal is the unreasonable design of mechanical seal parameters. By changing the design parameters of the mechanical seal,the heat of the sealing surface is reduced and the normal leakage of the end face is increased,the service life of the mechanical seal is greatly prolonged.