分压法制备高压氦-氧混合气的HYSYS模拟计算研究

HYSYS Simulation Research on Preparation of High Pressure Helium-Oxygen Mixture with Manometric Method

以氧含量为(20±0.5)%的氦氧混合气的制备为例,选用先充装医用氧、后充装高纯氦的分压法工艺,利用基于SRK、PR、PRSV和BWRS 4种状态方程HYSYS软件,对分压法的控制分压进行了数值模拟。通过与文献值进行比较,推荐与文献结果误差最小的SRK状态方程进行氦氧混合气制备过程的模拟。比较了原料氧气温度、压力和纯度等工艺参数的变化对分压法配气不确定度的影响,认为模拟结果对加强氦氧混合气体工业生产的质量控制具有实际指导意义。

The paper uses the example of preparation for helium-oxygen mixture which contains（20 ± 0. 5）% oxygen. The manometric method of filling medical oxygen before filling high purity helium is selected. Numerical simulation was performed on the partial pressure of manometric method by using the HYSYS calculation software based on the SRK,PR,PRSV and BWRS four state equation. Based on the comparison between the simulation results and the values of literatures,the SRK state equation with the minimum error of the literature values is recommended to simulate the process of preparation for helium-oxygen mixture. Comparative analysis is conducted on the influence of manometric method＇s uncertainty by the parameter-changes（such as temperature,pressure and purity of medical oxygen）. It is considered that the simulation results have important guiding significance for strengthening the quality control of helium-oxygen mixture industrial production.