Study on energy efficiency improvement and membrane life extension of ion membrane caustic soda electrolyzer
离子膜法烧碱电解槽能效提升与膜寿命延长技术研究

摘要

离子膜法烧碱电解槽的能效与膜寿命是影响工业生产效率和经济性的关键因素。针对电解过程中能耗高、膜老化快的问题，研究通过优化电流密度分布、控制槽内温度、改进膜材料及应用表面处理技术，实现电解效率提升与膜寿命延长。综合技术措施可降低局部极化和能量损失，增强离子迁移效率，维持氢氧化钠产率稳定，并减缓膜性能衰退。实验与工业应用表明，多因素协同优化能够在高电流密度及长期运行条件下保持低能耗、高产率和设备可靠性，为离子膜法烧碱工艺的高效化提供技术保障。

Abstract

The energy efficiency and membrane lifespan of ion-exchange membrane (IM) electrolyzers for caustic soda production are critical determinants of industrial productivity and economic viability. To address challenges such as high energy consumption and rapid membrane degradation during electrolysis, this study proposes integrated optimization strategies including current density distribution adjustment, temperature control within the cell, improved membrane material selection, and surface treatment technologies. These coordinated measures effectively reduce localized polarization and energy loss, enhance ion migration efficiency, maintain stable sodium hydroxide yield, and slow down membrane performance deterioration. Experimental validation and industrial applications demonstrate that this multi-factor synergy enables sustained low energy consumption, high production rates, and equipment reliability under high-current-density operating conditions, providing technical assurance for the efficient implementation of IM-based caustic soda processes.