Tsai Shao-Chi, Huang Wei-Zhi, Lin Geng-Sheng, Wang Zhen, Tung Kuo-Lun, Chuang Ching-Jung
R&D Center for Membrane Technology, Department of Chemical Engineering, Chung Yuan Christian University, Taoyuan 320, Taiwan.
Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan.
Membranes (Basel). 2022 Apr 16;12(4):432. doi: 10.3390/membranes12040432.
In this study, theoretical models for specific energy consumption (SEC) were established for water recovery in different integrated processes, such as RO-PRO, RO-MD and RO-MD-PRO. Our models can evaluate SEC under different water recovery conditions and for various proportions of supplied waste heat. Simulation results showed that SEC in RO increases with the water recovery rate when the rate is greater than 30%. For the RO-PRO process, the SEC also increases with the water recovery rate when the rate is higher than 38%, but an opposite trend can be observed at lower water recovery rates. If sufficient waste heat is available as the heat source for MD, the integration of MD with the RO or RO-PRO process can significantly reduce SEC. If the total water recovery rate is 50% and MD accounts for 10% of the recovery when sufficient waste heat is available, the SEC values of RO, RO-PRO, RO-MD and RO-MD-PRO are found to be 2.28, 1.47, 1.75 and 0.67 kWh/m, respectively. These critical analyses provide a road map for the future development of process integration for desalination.
在本研究中，针对不同的集成工艺（如反渗透-压力 retarded 渗透（RO-PRO）、反渗透-膜蒸馏（RO-MD）和反渗透-膜蒸馏-压力 retarded 渗透（RO-MD-PRO））中的水回收，建立了特定能耗（SEC）的理论模型。我们的模型可以评估不同水回收条件下以及各种比例的供应废热情况下的特定能耗。模拟结果表明，当水回收率大于 30%时，反渗透中的特定能耗随水回收率增加。对于反渗透-压力 retarded 渗透工艺，当水回收率高于 38%时，特定能耗也随水回收率增加，但在较低水回收率时观察到相反的趋势。如果有足够的废热作为膜蒸馏的热源，将膜蒸馏与反渗透或反渗透-压力 retarded 渗透工艺集成可以显著降低特定能耗。如果总水回收率为 50%且在有足够废热时膜蒸馏占回收率的 10%，则发现反渗透、反渗透-压力 retarded 渗透、反渗透-膜蒸馏和反渗透-膜蒸馏-压力 retarded 渗透的特定能耗值分别为 2.28、1.47、1.75 和 0.67 kWh/m。这些关键分析为海水淡化工艺集成的未来发展提供了路线图。
