Research on the evaluation method for the outflow uniformity of liquid distributor

The outflow uniformity of liquid distributors is a crucial indicator affecting efficient wastewater treatment processes. Currently, there is no unified standard for evaluating the outflow uniformity of liquid distributors, especially for symmetrical structures, which are difficult to evaluate. This article established a simplified finite element analysis method based on the species transport model and verified the applicability for the structure of a two-stage liquid distributor. The distribution of flow rate at the outlet under different inlet methods and different sizes of the liquid distributors was studied, and an appropriate evaluation method for the uniformity of the outlet was selected. The results showed that the outflow uniformity of the liquid distributor with two-end inlet and intermediate inlet structures was significantly better than that with one end inlet structure,and the outflow uniformity of the two-end inlet structure was slightly better than that with the intermediate inlet structure. The Killat partition method was more suitable for evaluating the outflow uniformity of large-size symmetric liquid distributor compared to the Christensen uniformity coefficient method and the Bai Yuehua area method.