乳化液体连续配制系统的理论计算

Theoretical Calculation of a Continuous Preparation System for Emulsion

提出一种新型的利用文丘里管连续配制乳化液的乳化方法,达到柴油、甲醇和水三相连续乳化的目的。将待乳化的柴油从文丘里管入口段引入,甲醇水溶液从文丘里管喉部沿径向引入与柴油混合形成乳化液,由扩散段流出。设计了柴油、甲醇和水三相乳化液的整体制备系统,通过计算确定了文丘里管的结构参数,对不同扩散角和长径比的文丘里管内部流场进行了数值模拟,确定了最优化的几何参数,其中,扩散角和长径比分别为8°和1.25时乳化效果最优,为试验系统的设计提供了基础数据。

This article proceeds a new method which can continuously prepare emulsion by using a venturi tube,to achieve the goal of emulsify diesel oil,methane and water.The diesel oil comes in at the entrance of the venturi tube.The solution of methane and water comes in at the throat of venturi tube and mixes with diesel oil to form emulsion.The preparation system is designed and the structure parameter of the venturi tube is calculated.Then FLUENT is used to do a series of numerical simulation of the flow in the venturi tube under different parameters of spread angle and ratio of length to diameter,thus deciding the best parameters which are 8 degree and 1.25.The basic data for the design of experimental system is provided.