异波扰流折板絮凝器对薄荷水提液的絮凝效果研究

为了优化折板絮凝器结构以及提升折板絮凝器对薄荷水提液的絮凝效果,在普通异波折板絮凝器的基础上设计了一种异波扰流折板絮凝器。利用FLUENT对异波扰流折板絮凝器的内部流场进行模拟,分析异波扰流折板絮凝器流场内的涡旋分布,并以壳聚糖为絮凝剂,采用异波扰流折板絮凝器对薄荷水提液进行絮凝处理,以澄清层高度、沉降速度、吸光度以及絮体分形维数为指标,考察异波扰流折板絮凝器在不同进口流速下对薄荷水提液的絮凝效果。结果表明：异波扰流折板絮凝器产生的涡旋主要分布在扰流圆柱后方以及折板两侧,当进口流速为0.041 m.s^-1时,异波扰流折板絮凝器对薄荷水提液的絮凝效果最好,絮体密实度最高。

Study on the Flocculation Effect of Peppermint Water-Extraction Solution by the opposite folded-plate with baffle flow Flocculator

: In order to optimize the structure of the folded-plate flocculator and enhance the flocculation effect of the peppermint water-extraction, on the basis of the ordinary opposite folded-plate flocculator, the opposite folded-plate with baffle flow flocculator was designed. Vortex distribution in the flow field of the opposite folded-plate with baffle flow flocculator were simulated and analyzed by FLUENT. Using chitosan as a flocculant, flocculating the peppermint water-extraction by the opposite folded-plate with baffle flow flocculators, let clear layer height, sedimentation speed, absorbance and fractal dimension of flocs index, the influence of different inlet flow rates on flocculation for the effect of flocculant by the opposite folded-plate with baffle flow flocculators were discussed. Results showed that the vortex position of the opposite folded-plate with baffle flow flocculator was distributed on both sides of the folding plate and the rear of the cylinder. The optimal flocculation inlet flow rates of the opposite folded-plate with baffle flow flocculator for extracting mint water were 0.041 m.s^-1, the floc density was the highest.