文丘里洗涤器压力损失计算模型

Prediction Model for Pressure Drop in Venturi Scrubbers

准确预测文丘里洗涤器的压力损失并加以合理利用,是设备优化设计和节能的关键.由实验可知,文丘里洗涤器的扩散段可回收相当大一部分能量,不能简单地认为它与摩擦压力损失可互相抵消.通过理论分析,在考虑气体摩擦压力损失和扩散段液滴减速压力回收的基础上,推导出了1个简单、准确的文丘里洗涤器压力损失模型.该模型的理论预测值和实验值一致,并在实验基础上将该模型和修正的Calvert模型及Yung模型进行了对比.

Accurately predicting and rationally using pressure drop are very important in optimizing the design of a Venturi scrubbers and reducing energy consumption.Experimental results show that diverging section will recover a considerable part of energy,so it′s incorrect to consider that pressure recovery in diverging section can compensate for frictional pressure drop.In this paper,through theoretical analysis,considering gas frictional pressure drop and pressure regain in diverging section due to droplet′s deceleration,a simple and accurate model for the prediction of overall pressure drop in Venturi scrubbers is deduced.Calculation data are found in good (agreement) with that of experiment.Comparison is made experimentally with predictions of pressure drop for Venturi scrubber between presented model, modified Calvert model and Yung model.