船舶油舱油气冷凝回收系统流程模拟与能耗优化

Process simulation and energy consumption optimization of oil and gas condensate recovery system in ship oil tank

关键词:  冷凝回收系统  流程模拟  能耗优化  火用分析 

Key words:  condensate recovery system  process simulation  energy consumption optimization  exergy analysis

摘要:

目的 解决船舶油舱内的油气回收处理问题,节约能源,降低环境污染。方法 使用HYSYS模拟多级冷凝油气回收的流程,并进行试验验证,依据试验后的数据分析,增加了余冷回收流程以改进冷凝回收系统,并通过火用分析方法对比分析改进前后系统的火用损失及火用效率。结果 模拟及试验均能成功完成多级冷凝的油气回收,并且增加了余冷回收流程的系统总能耗,相比试验时总能耗可节约301.5×10⁴ kJ/h,占改进前试验总能耗的13.71％,整个系统火用损失减少了45 432 kJ/h,火用效率提升了2.79%。结论 多级冷凝回收系统处理后的尾气完全满足国家排放标准及油气回收要求,减少了尾气直接排放的冷量损失及冷凝回收系统的能耗。 

Abstract:

Objective The problem of oil and gas recovery and treatment in oil tank of ship is solved in order to save energy and reduce environmental pollution. Methods HYSYS is used to simulate the process of multi-stage condensate oil and gas recovery and carry out test verification. According to the data analysis after the test, the residual cooling recovery process is added to improve the condensate recovery system. The exergy loss and exergy efficiency of the system before and after the improvement are compared and analyzed by exergy analysis method. Results The simulation and test can successfully complete the oil and gas recovery of multi-stage condensation, and the total energy consumption of the system with increased residual cooling recovery process can save 3 015×10³ kJ/h comparing with the total energy consumption in the test, accounting for 13.71% of the total energy consumption in the test before the improvement. The total exergy loss of the whole system is reduced by 45 432 kJ/h, and the exergy efficiency is increased by 2.79%. Conclusion sThe tail gas treated by the multi-stage condensation recovery system fully meets the national emission standards and the requirements for oil and gas recovery, reducing the loss of cooling capacity caused by the direct emission of tail gas and the energy consumption of the condensation recovery system.