净水技术2025，Vol.44Issue(7)：50-55,129,7.DOI:10.15890/j.cnki.jsjs.2025.07.006
国产陶瓷超滤膜在低温海水淡化中的应用
Application of Domestic Ceramic UF Membranes in Low-Temperature Seawater Desalination
摘要
Abstract
[Objective]As a pretreatment unit in seawater desalination,ultrafiltration(UF)serves as a critical barrier to ensure the stable operation of the core desalination reverse osmosis membrane.However,under low winter temperatures in northern China,traditional organic UF membranes face significant challenges,including reduced water production capacity and increased membrane filament breakage rates.To address these issues,this study conductes pilot-scale demonstrations of low-temperature seawater desalination pretreatment using domestically developed inorganic ceramic UF membranes,which exhibit high mechanical strength and thermal stability.[Methoods]Under both ambient(from 16.7 to 20.9 ℃)and low-temperature(from 2.2 ℃ to 5.0 ℃)conditions,constant-pressure and constant-flow operational modes were employed to evaluate and compare the permeate flux,transmembrane pressure difference(TMP),and water production variations of ceramic and organic membranes.[Results]Under constant-pressure operation,ceramic membranes demonstrated significantly higher permeate flux than organic membranes at ambient temperatures.Although the permeate flux of ceramic membranes declined more markedly than that of organic membranes under low-temperature conditions,they still outperformed organic membranes.Under constant-flow operational mode,ceramic membranes could enhance filtration driving force by increasing the TMP,thereby maintaining stable water production.In contrast,low-temperature conditions exerted a more pronounced adverse effect on organic membranes,with their water yield dropping to merely from 37％to 41％of that observed under ambient temperatures.[Conclusion]The domestically developed ceramic membranes exhibit superior water production stability compared to organic membranes in low-temperature pilot-scale trials.These findings provide technical references and operational parameter guidelines for the practical application of ceramic membranes in low-temperature seawater desalination pretreatment processes.关键词
国产陶瓷超滤膜/有机超滤膜/低温/海水淡化/产水性能/跨膜压差(TMP)Key words
domestic ceramic UF membrane/organic UF membrane/low temperature/seawater desalination/water production performance/transmembrane pressure difference(TMP)分类
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杨鑫,刘旭阳,杨兴涛,王钧,刘长青,王智美..国产陶瓷超滤膜在低温海水淡化中的应用[J].净水技术,2025,44(7):50-55,129,7.基金项目
青岛市海洋科技创新专项海洋产业关键技术攻关项目(23-1-3-hygg-17-hy) （23-1-3-hygg-17-hy）
