电解室结构随电流密度提升的匹配设计

Design of electrolyzer structure matching increased current density

通过对传统的NBZ-2.7型电解槽的内部结构进行分析和改善,优化电解室的传质条件。对有关气液分离的结构和出口结构进行优化,改善气液分离及导出的结构条件。将阴极弹性缓冲结构与挤压后的极间距状态进行分析,匹配性设计弹性缓冲结构,改善离子膜的受力状态,延长膜的使用周期。通过上述对膜极距电解槽结构的一系列研究及设计完善,使新的(第2代)膜极距电解槽能够在电解电流密度6 k A/m2的条件下稳定运行,开车初期生产1 t烧碱电耗约2 035 k W·h,提高了性能水平。

The internal structure of traditional NBZ - 2.7 type of electrolyzers was analyzed and improved and thus the mass transfer conditions inside the electrolyzers were optimized. The structure associated with gas-liquid separation and the structure of outlet were optimized and thus the conditions of gas-liquid separation and outflow were improved. The cathode elastic buffer structure were analyzed and designed to match the electrode-gap after it was pressured, and thus the stress state of ion-exchange membranes was improved and their use periods prolonged. The structure of zero-gap electrolyzers was studied and well designed, as noted above, and thus the new （second generation） zero-gap electrolyzers had high level of performance, stably run at 6 kA/m^2 current density, consumed about 2 035 kW·h electricity for producing one ton of NaOH at initial production.