不锈钢折波预过滤器的复用再生工艺研究

Research on reuse and regeneration technology of stainless steel folding wave pre-filter

为减少某核电站热机修厂房送风系统不锈钢折波预过滤器的报废数量,增加使用寿命,通过试验研究了不锈钢折波预过滤器的复用处理工艺,包括冲洗、超声振动、高温灼烧除尘、干燥等工序;研究了处理复用15次预过滤器的过滤阻力及计重效率。结果表明:冲洗、超声振动、高温灼烧除尘和干燥复合的工艺能有效去除不锈钢折波预过滤器中积聚的人工尘和纤维絮状物团球,经过处理复用的预过滤器能达到满足洁净预过滤器的阻力和计重效率的参数要求,复用次数在15次以内时,计重效率保持在86.11%以上;研究发现人工尘易在滤网表面积累堵塞金属纤维孔隙,随着向滤层内部延伸,这种现象逐渐减少。

In order to reduce the quantity of scrap stainless steel folding wave pre-filter in the air supply system of a thermal machinery repair building of a nuclear power plant,and to increase the service life,a reuse process of stainless steel folding wave pre-filter was studied through experiments.The experiments include washing,ultrasonic vibration,high temperature dust removal,drying and other processes.The filtration resistance and weight efficiency of the pre-filter with 15 times reuse were studied.The results show that:The composite process of washing,ultrasonic vibration,high temperature dust removal and drying can effectively remove the artificial dust and fiber flocculent pellets accumulated in the stainless steel folding wave pre-filter,and the processed and reused pre-filter can restore the resistance of the clean pre-filter and the parameter requirements of the weight efficiency.When the number of reuse is less than 15 times,the weight efficiency is maintained above 86.11%.The number of reuse can reach more than 15 times.It is found that artificial dust tends to accumulate and clog the metal fiber pores on the surface of the filter,and this phenomenon gradually decreases as it extends to the inside of the filter layer.