低温甲醇洗PSRK热力学方程改进与全流程模拟

发布时间：2018-05-06 12:06

本文选题：低温甲醇洗 + PSRK方程改进　；参考：《化学工程》2017年03期

【摘要】：低温甲醇洗工艺广泛应用于酸性气体净化,但在Aspen Plus软件中,软件自带的热力学方程不能准确模拟该流程。为了提高热力学方程计算的精确度,文中首先使用Aspen Plus软件内置的PENG-ROB,PK-ASPEN,PSRK热力学方程,模拟低温甲醇洗工艺中的脱硫塔和脱碳塔。模拟结果表明:这3个方程的模拟结果和实际数据均存在差距,但PSRK方程的模拟结果和实际数据最接近。在此基础上,文中修正了PSRK方程中部分二元交互作用参数,修正后的PSRK方程能够准确模拟脱硫塔和脱碳塔,关键流股中关键组分的模拟结果与实际数据吻合良好。另外,为了增加模拟的实用性,文中设置了撕裂流股和收敛模块,模拟了低温甲醇洗全流程,为低温甲醇洗流程的设计计算提供了可靠的技术支持。
[Abstract]:Low temperature methanol washing process is widely used in acid gas purification, but in Aspen Plus software, the thermodynamic equation of the software can not accurately simulate the process. In order to improve the accuracy of thermodynamic equation calculation, the PENG-ROBN PK-ASPENN PSRK thermodynamic equation built into Aspen Plus software is used to simulate the desulfurization tower and decarbonization tower in the low-temperature methanol washing process. The simulation results show that there is a gap between the simulation results of the three equations and the actual data, but the simulation results of the PSRK equation are the closest to the actual data. On this basis, some binary interaction parameters in the PSRK equation are modified. The modified PSRK equation can accurately simulate the desulfurization tower and the decarburization tower. The simulation results of the key components in the key flow stocks are in good agreement with the actual data. In addition, in order to increase the practicability of the simulation, a tear flow unit and a convergence module are set up to simulate the whole process of low-temperature methanol washing, which provides reliable technical support for the design and calculation of the low-temperature methanol washing process.
【作者单位】：天津大学化工学院;开封空分集团有限公司;
【分类号】：TQ028.2

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