Abstract: A seed crystal coating machine dedicated for 800-1000 mm industrial stainless steel or ceramic tubular membrane support was developed. The machine adopt a coating method of spray and smear, seed crystal suspension was first spayed onto the rotating tubular support and then smeared evenly to form a thin film by inflated silicone rubber balloon. Combined with automatic control technology, the machine provided a solution for automatic seed crystal coating in process of zeolite membranes mass production. Main structure and working principle was introduced and the key factors affecting coating performance such as balloon hardness, balloon structure, balloon inflation pressure and moist state of seed crystal has been tested and analyzed. Production experiment of NaA zeolite sieve membrane with prototype has been conducted and the performance of products has been tested with 90% industrial alcohol at temperature of 75℃. Result showed the design was feasible and reliable, prototype coating speed was 30 products per hour and yield was above 98%; permeation flux of produced sieve membrane was 4-5.5 kg·m^-2·h^-1, water ratio of penetrating fluid was 99.2%-99.8%.

Key words: zeolite membrane, membrane support, coating machine, permeation, seed crystal, hydrothermal method

摘要： 研制了基于800~1000 mm长工业规格不锈钢或陶瓷管状支撑体的晶种涂敷设备。采用先喷涂后摩擦工艺，结合自动化控制技术，实现了分子筛膜大规模制备中晶种的快速涂敷。详细介绍了涂敷机工作原理和主要结构，分析研究了影响设备涂敷性能的主要因素。对不锈钢支撑体进行晶种涂敷制备NaA透水膜实验，在温度为75℃、原料液中乙醇质量分数为90%的条件下，膜渗透通量为4.2~5.8 kg·m^-2·h^-1；渗透液中水质量分数为99.2%~99.8%；生产率为30根/小时，成品率大于98%。

关键词: 分子筛膜, 支撑体, 涂敷机, 渗透, 晶种, 水热合成