正仲转化换热一体化大规模氢液化流程模拟

Simulation on large-scale hydrogen liquefaction process integrating ortho-para conversion and heat exchange

针对实际氢液化工厂存在的能源消耗高、产量小的问题,氢正仲转化催化和热交换一体化技术出现在许多新概念的氢液化循环中。文中采用氢膨胀制冷的氢液化循环,针对催化剂填充在换热器中及使用独立转化器2种氢液化流程进行研究,使用Aspen HYSYS搭建了2种液化系统,对比分析其在能耗、[火用]效率、氢液化率的差异。结果表明:与设置独立转换器的氢液化系统相比,一体化流程的单位能耗降低了6.6%,[火用]效率提高了27.76%,氢液化率提高了48.7%。一体化氢液化流程设备更加简单,投资成本更低,发展前景广阔,为一体化氢液化流程的应用提供了理论参考。

In view of the problems of high energy consumption and low output in actual hydrogen liquefaction plants,an integrated technology of heat transfer and ortho-para hydrogen conversion appears in many new conceptual hydrogen liquefaction cycles.The integrated hydrogen liquefaction cycle and the liquefaction system with independent converters adopting hydrogen turbine expansion refrigeration were simulated using Aspen HYSYS software.The differences in energy consumption,exergy efficiency and hydrogen liquefaction rate were compared and analyzed.The results show that compared with the hydrogen liquefaction system with independent converters,the unit energy consumption of the integrated process decreases by 6.6%,the efficiency increases by 27.76%,and the liquefaction rate also increases by 48.7%.Besides of the simpler equipment and the lower investment cost,the integrated hydrogen liquefaction also has wider application scenarios.This paper provides a reference for the research of the integrated hydrogen liquefaction process.