自动反冲洗过滤器的改进与研究

Design of an automatic return rinsing filter

针对目前自动反冲洗过滤器过滤过程不连续、占地面积大和自重对过滤过程有影响的问题开发了一种全新的自动反冲洗过滤器。采用混合多相流模型、标准的k-e湍流模型和SIMPLEC算法,应用计算流体力学软件Flu-ent对过滤头相邻叠片间的流场进行分析。通过数值模拟,可以很清楚的显示出深层过滤时叠片间过滤液的过滤过程以及过滤液的速度矢量分布情况。由模拟结果可知过滤头的结构改进满足设计要求,本方案有利于提高过滤效率和降低过滤过程中的压力损失,从而降低了过滤器的成本,有很高的经济价值。在没有成熟设计理论的背景下,为设计方案可行性提供了依据。

A new automatic return rinsing filter has been developed in order to overcome the deficiencies of current automatic return rinsing filters which are not continuous and cover a large area.The new filter is based on a multi-phase flow model,the standard k-e turbulence model and the SIMPLEC algorithm.The computational fluid dynamics software Fluent has been used to analyze the flow field of the lamination adjacent to the filter head.By numerical simulation,the fluid filtration process and the distribution of the velocity vector of the filtrate between adjacent lamination regions have been clearly delineated.The simulation results show that all the design requirements are satisfied,and the program helps to improve filtration efficiency and reduce the pressure loss during the filtration process.This thereby reduces the cost of the filter and brings high economic benefits.The simulations described provide a basis for testing the feasibility of a design in the absence of a mature theory.