针对隔膜压滤机各工作流程阶段污泥的过滤性能,运用Fluent软件数值模拟隔膜压滤机压滤过程,研究污泥二相流在隔膜压滤机深度脱水过程中滤液总量随时间变化的规律,并采用最小二乘法拟合其关系曲线.通过仿真分析,提出隔膜压滤机鼓膜阶段的虚拟滤液量法的概念,并以此推导鼓膜阶段实际滤液总量V3与压滤时间的数学关系表达式,描述两者的影响关系,进而得到隔膜压滤机工作效率的计算公式;利用该公式对某污泥处理厂隔膜压滤机各工作阶段时间进行优化计算.研究结果表明:对于规格一定的隔膜压滤机,其压滤阶段时间是压滤机工作效率的决定因素;利用本文方法计算的某污泥处理厂隔膜压滤机各工作阶段时间,污泥处理工作总效率提高37.7%,为隔膜压滤机进行污泥脱水找到了最佳作业流程时间,大大提高了作业效率.%In order to study filterability of membrane filter press in each work stage, the filter processes were simulated to find the regulation between the filter volume and the work time by software Fluent. And the algorithm was fitted by the least square method. According to the simulation results, a conception named virtual filter volume that can describe the regulation between the filter volume and work time in the stage of inflating membrane was put forward by mathematical method. Then the efficiency formula of filter press was derived. The results show that pressure filter time is the key factor to the efficiency formula of filter press, and the work efficiency of a certain sludge treatment plant is increased by 37.7% using this mathematical method. The optimum work cycle time of filter press is obtained, and its work efficiency is improved greatly.
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