摘要
再冷凝器的控制操作繁多且相互关联,容易造成操作不当,同时由于设备性能下降等原因,再冷凝器运行经常进入非设计工况,影响接收站正常生产。利用动态模拟方法可有效还原事故经过,探寻预防措施。在已有LNG接收站再冷凝系统动态仿真模型的基础上,完善了再冷凝器的冷凝量计算模块,更加全面地模拟再冷凝器在各种工况下的运行情况,仿真结果得到了现场数据的验证。进一步动态模拟探究了再冷凝器长时间高液位运行时,采用高压补气降低液位措施的风险,以及提出在截断高压NG管线恢复正常运行过程中,需结合实际情况考虑重设气液配比系数的操作改进建议。
As there are a lot of tangled control operations about the re-condenser,with the decreasing performance of related facilities,it＇s easy to run into non-design cases,and this will affect the normal production of the terminal.Using dynamic simulation method,the accident process can be effectively reappeared and preventive measures can be explored.Based on dynamic simulation model for LNG receiving terminal＇s re-condensing system,the concept of multiplying heat exchange area by the packing material for the condensing rate calculation is introduced,the re-condenser mathematic model is improved and verified by the field data.Further,the process of turning on NG inlet flow after long-term high level running is simulated to analyze its accident risk,and process of turning off NG inlet flow to restore normally operation is suggested to take resetting the gas-liquid ratio coefficient at the right timing.
出处
《石油与天然气化工》
CAS
北大核心
2016年第4期31-37,共7页
Chemical engineering of oil & gas
基金
基金项目:广东省教育厅液化天然气与低温技术重点实验室(39000-3211101)
中山大学-BP液化天然气中心(99103-9390001)
关键词
再冷凝器
低温过程
动态模拟
操作优化
re-condenser
cryogenic processes
dynamic simulation
operation optimization
