负压闪蒸原油稳定工艺的模拟与运行参数优化

Simulation and operating parameters optimization of minus pressure flash technology for crude stabilization process

采用原油实沸点蒸馏-天然气组分混合模型对油气混合物进行表征,利用流程模拟软件对联合站的负压闪蒸原油稳定工艺进行模拟,对不同运行参数下的综合效益进行预测及分析,确定优化运行参数。流程模拟中,采用原油实沸点蒸馏实验数据和天然气组分测试数据对稳定塔进料进行表征,利用Aspen HYSYS对实际流程进行模拟,并将模拟结果与现场运行参数进行对比,验证模拟计算的准确性。对不同稳定塔操作压力、压缩机出口压力、气提气流量、进料温度条件下的工艺流程进行了模拟,并对不同条件下的产品产量和能耗进行综合分析,优化分析结果表明:1当稳定塔操作压力为-0.065^-0.06 MPa时,轻烃产量较高;2气提气工艺可有效提高轻烃回收率;3当稳定塔进料温度为75~90℃时,综合效益较高。

The minus pressure flash technology of crude stabilization was simulated by using process simulation software with TBP-NG component model and the comprehensive benefits under different operating parameters were predicted and analyzed to determine the optimal operating param-eters.In process simulation,the TBP distillation data of crude oil and test data of natural gas compo-nents were adopted to characterize the feed of stabilizer,and the simulation of actual process was crea-ted by Aspen HYSYS,and the simulation results were compared with the actual operating parameters to verify the accuracy of simulation calculation.The processes under various stabilizer operating pres-sure,compressor outlet pressure,stripping gas flow and feed temperature were simulated and the corresponding product yield and energy consumption were analyzed comprehensively to determine the optimal operating parameters.The analysis result showed that the light hydrocarbon yield is higher when the operating pressure ranges from -0.065 MPa to -0.06 MPa;the stripping gas technology is effective to increase the light hydrocarbon yield;and the comprehensive benefit is higher when the in-let temperature ranges from 75 ℃ to 90 ℃.