CAJ | 학술논문

工业中填料床往往处于湍流操作条件下，导致传质扩散呈现各向异性。针对填料床反应过程的预测，本文采用了雷诺质流模型，该模型的特点是通过直接求解雷诺质流方程来封闭湍流传质方程，从而准确表征填料床内湍流传质扩散的各向异性，得到更为准确的组分浓度、流体温度及速度分布。本文模拟了散堆填料塔内一乙醇胺溶液(MEA)-CO2化学吸收过程。模拟结果与文献报道的实验数据符合较好，验证了模型的可靠性。
공업중전료상왕왕처우단류조작조건하，도치전질확산정현각향이성。침대전료상반응과정적예측，본문채용료뢰낙질류모형，해모형적특점시통과직접구해뢰낙질류방정래봉폐단류전질방정，종이준학표정전료상내단류전질확산적각향이성，득도경위준학적조분농도、류체온도급속도분포。본문모의료산퇴전료탑내일을순알용액(MEA)-CO2화학흡수과정。모의결과여문헌보도적실험수거부합교호，험증료모형적가고성。
The mass diffusion in packed bed under turbulent condition,which is a common operating conditionin industry,often shows anisotropy. In the present study,Reynolds mass flux model was applied for simulating the reaction processes in packed bed. The feature of the model is that the modeled Reynolds mass flux equation is used to close the turbulent mass transfer equation,therefore the anisotropic turbulent mass diffusion can be characterized with accuracy. With the proposed model,the distributions of concentration and temperature as well as the velocity were obtained. To validate the present Reynolds mass flux model,simulation of the chemical absorption of CO2into aqueous MEA solution in packed bed was carried out. The simulated results were compared against the open experi-mental data and satisfactory agreement has been found between them.