ABSTRACT

Hollow fiber membrane solution dehumidification technology is a new type of dehumidification technology combining solution dehumidification and membrane separation. It is currently widely used in the field of air conditioning dehumidification. In this study, membrane dehumidification technology was applied to low-temperature flue gas dehumidification, and a model of regularly arranged hollow fiber membrane modules was established on the basis of a conjugate heat and mass transfer model. The accuracy of the model was verified by comparing it with literature and experimental data, applying a random arrangement of components. Numerical simulation is carried out by COMSOL software. The flue gas velocity, temperature and water vapor concentration field in the module are coupled together, and the flue gas flow and heat and mass transfer characteristics are affected by the distance between the membrane filament tubes. The dehumidification and cooling efficiency of the randomly arranged hollow fiber membrane module can reach 68.3% and 39.1%,respectively, which Close to 72.1% and 48.7% of regularly arranged components. And the components can be optimized based on the model.

摘要

中空纤维膜溶液除湿技术是一种将溶液除湿与膜分离相结合的新型除湿技术。目前广泛应用于空调除湿领域。本研究将膜除湿技术应用于低温烟气除湿，基于共轭传热传质模型建立规则排列的中空纤维膜组件模型。通过将其与文献和实验数据进行比较，应用组件的随机排列来验证模型的准确性。数值模拟由 COMSOL 软件进行。模块内的烟气速度、温度和水汽浓度场耦合在一起，烟气流量和传热传质特性受膜丝管间距的影响。随机排列的中空纤维膜组件的除湿降温效率分别达到68.3%和39.1%，接近规则排列组件的72.1%和48.7%。并且可以基于模型优化组件。