生物填料塔不同种类填料的过流阻力试验研究

Experimental study on flow resistance of different fillers in a biological packing tower

采用聚氨酯、陶粒、竹炭、活性炭填充生物填料塔,分析了4种填料在不同高度、过滤风速、喷淋密度条件下所产生的过流阻力。结果表明:这4种填料的过流阻力均随过滤风速的增加而增大,填料过流阻力与过滤风速呈多项式函数关系;对于聚氨酯、陶粒等过流阻力较小的填料,喷淋密度对过流阻力的影响较小,过流阻力随喷淋密度增加而略微增大;当过滤风速一定时,按各填料过流阻力大小排序,依次为干态活性炭、湿润竹炭、连续喷淋的陶粒、连续喷淋的聚氨酯。

Polyurethane,ceramsite,bamboo charcoal and activated carbon were used to fill a biological packing tower.The flow resistance of these four fillers was analyzed under different height,filtration velocity and spray density.The results show that the flow resistance increases with the increase of filtration velocity,showing a polynomial function relationship.For polyurethane and ceramsite which have low flow resistance,their flow resistance is hardly affected by spray density,but increased slightly with the increase of spray density.When the filtration velocity was kept constant,the order of fillers based on flow resistance from high to low was dry activated carbon,wet bamboo charcoal,continuous-spraying ceramsite and continuous-spraying polyurethane.