膜分离-变压吸附协同捕集低浓度烟气二氧化碳工艺模拟研究

Simulation of low-concentration carbon dioxide captured by synergic process of membrane separation and pressure swing adsorption

利用软件PROⅡ和Aspen Adsorption分别模拟协同工艺中膜分离和变压吸附过程,通过引入气体流量修正系数解决气体流量不匹配问题,提高膜-变压吸附协同碳捕集工艺模拟的准确性。案例研究表明,引入流量修正系数解决了协同工艺模拟过程中出现的气体流量不匹配问题,实现了稳态膜分离和动态循环变压吸附过程的耦合。与以往的膜-变压吸附协同工艺模拟方法相比较,更好地识别了能耗降低和捕集率提升的技术途径。

PRO Ⅱ software and Aspen Adsorption software are respectively employed to simulate membrane separation and pressure swing adsorption process in synergic process.The issue of gas flow mismatch is solved by adding a flow rate correction coefficient to improve the accuracy of simulation on membrane separation-pressure swing adsorption collaborative carbon capture process.The results through a case study indicate that the steady-state and dynamic processes are well integrated by adding the flow rate correction coefficient. Compared with previous simulation methods,the technical approach to energy consumption reduction and capture rate improvement are more accurately identified.