CFD Simulation of the Two-Phase Flow in a Novel Cooking Tank for Ethanol Production

作     者：Cheng Liu Yang Lu Yan Zhou Xuanwen Zhu Minhua Zhang Zhongfeng Geng 

作者机构：Key Laboratory for Green Chemical Technology of Ministry of EducationTianjin University R&D Center for Petrochemical TechnologyTianjin 300072China Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300072China 

出 版 物：《Transactions of Tianjin University》 (天津大学学报（英文版）)

年 卷 期：2018年第24卷第3期

页      面：212-223页

核心收录：

学科分类：080706[工学-化工过程机械] 081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 

主　　题：Cooking tank Computational fluid dynamics Euler-Euler model Particle dynamics Structural optimization 

摘      要：As a key piece of equipment in bioethanol production, cooking tank is usually used to ensure the uniformity of liquefaction. In this paper, we propose a novel type of cooking tank to ensure a type of starch slurry flow known as a quasi-plug flow in a large-scale process. In the analyses of flow field, we used computational fl uid dynamics(CFD). To simulate the liquid–solid two-phase flow, we chose a Euler–Euler model based on particle dynamics. We investigated the eff ects of several key structural parameters on the flow field. The results show that for a tank with 12,800 mm in height and 1000 mm in diameter, the optimized inlet tube angle and inlet tube diameter range from 0° to 45° and 0.125 to 0.15 D(diameter of cooking tank), respectively. We determined the optimum cone mouth diameter at the exit and its distance to the bottom to range from 0.18 to 0.30 D and 0.045 to 0.070 D, respectively. The analysis results suggest that the tank performs well when its aspect ratio ranges from 9.62 to 12.8. Our findings provide a theoretical basis for designing and optimizing the cooking tank.