为方便电厂烟气CO2膜分离过程的工程计算,本文对中空纤维膜组件分离过程建立了简化模型。该模型不考虑浓差极化现象和渗透侧的压力损失,将膜内流动近似为逆流并采用变化的渗透速率参数。在不同的原料气总流量、原料气CO2浓度和原料气压力等条件下,本研究将模拟结果与实验结果进行了对比,并分析了相对误差的变化规律。结果表明,模型的相对误差随原料气CO2浓度和原料气压力的增大而增大,随原料气总流量的增大而减小。在工程允许的误差范围内,该模型所得的模拟值可以近似地反映实际结果。

For the convenience of engineering calculation of CO2 membrane separation in power plant flue gas, a simplified model for hollow fiber membrane module is established in this paper. Without considering concentration polarization and pressure loss on the permeate side, the model approximates the flow in the membrane to countercurrent and uses a variable permeation rate parameter. Under the conditions of different total flow rate of feed gas, CO2 volume fraction of feed gas and feed gas pressure, this model is compared to the experimental results and the variation of relative error is analyzed. The results show that the relative error of the model increases with the increase of CO2 volume fraction of feed gas and feed gas pressure, and decreases with the increase of total flow rate of feed gas. Within the allowable error range of engineering, the simulated values of the model can approximately reflect the actual results.

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国家重点研发计划资助（2017YFB0603403）