煤化工含盐污水降膜蒸发流动特性的数值模拟分析

张游; 赵婷婷; 杜燃利; 李华山; 孔祥成; 薛建良

doi:10.13205/j.hjgc.202306003

煤化工含盐污水降膜蒸发流动特性的数值模拟分析

doi: 10.13205/j.hjgc.202306003

张游¹,
赵婷婷²,
杜燃利³,
李华山^4,5,
孔祥成^4,5,
薛建良^4,5, ,

1. 水发规划设计有限公司, 济南 250014;
2. 江苏河海环境科学研究院有限公司, 南京 210024;
3. 山东省临沂生态环境监测中心, 山东临沂 276007;
4. 山东科技大学安全与环境工程学院, 山东青岛 266590;
5. 黄河三角洲地表过程与生态完整性研究院, 山东青岛 266590

基金项目:

国家自然科学基金资助项目（52070123）；山东省自然科学基金（ZR2020ME224）

详细信息

作者简介:
张游(1987-),男,高级工程师,主要研究方向为含盐废水管内流动特性研究。516537498@qq.com

通讯作者:
薛建良(1982-),男,副教授,博士,主要从事煤化工含盐废水的蒸发模拟研究。jianliangxue@sdust.edu.cn

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出版历程
- 收稿日期: 2022-08-31
- 网络出版日期: 2023-09-02

NUMERICAL SIMULATION ANALYSIS OF FLOW CHARACTERISTICS OF DESCENDING FILM EVAPORATION OF SALT-CONTAINING WASTEWATER IN COAL CHEMICAL INDUSTRY

1. Shuifa Planning and Design Co., Ltd., Jinan 250014, China;
2. Jiangsu Hehai Environmental Science Research Institute Co., Ltd., Nanjing 210024, China;
3. Shandong Linyi Ecological Environment Monitoring Center, Linyi 276007, China;
4. College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China;
5. Institute of Yellow River Delta Earth Surface Processes and Ecological Integrity, Qingdao 266590, China

摘要

摘要: 在黄河流域煤化工高盐废水处理中，降膜蒸发技术由于具有传热系数高、物料停留时间短及处理效率高等优点而被广泛应用，但蒸发过程因流动特性差异而导致蒸发传热效果不佳，成为煤化工"近零排放"处理的关键技术要点之一。通过数值模拟研究3% NaCl在不同入口速度下的降膜流动特性差异，并对比分析了3%、5%和7% NaCl降膜流动特性的轴向与径向变化。结果表明：在不同入口速度下，含盐污水（3% NaCl）液膜温度和液体体积分数变化影响更为明显，入口速度越小，温度升高和液体体积分数减小更为迅速。同一入口速度下，3%、5%和7% NaCl轴向与径向温度、轴向湍流强度、轴向与径向液体体积均相差不大，而浓度高的含盐污水相较于其他组分液体流动轴向速度和径向速度略大，径向湍流强度则相反。
- 煤化工企业 /
- 含盐污水 /
- 降膜蒸发 /
- 数值模拟
Abstract: In the treatment of high salt wastewater emitted from the coal chemical industry in the Yellow River basin, the falling film evaporation technology was widely used, due to its advantages of high heat transfer coefficient, short material residence time and high treatment efficiency, but the evaporation process was not effective due to the difference of flow characteristics, which became one of the keys to the near zero discharge treatment of coal chemical industry. In this paper, the differences in falling film flow characteristics of 3% NaCl at different inlet velocities were studied by numerical simulation, and the axial and radial changes of the falling film flow characteristics of 3%, 5% and 7% NaCl were compared. The results showed that the effect of the change in liquid film temperature and liquid volume fraction of saline wastewater (3% NaCl) was more obvious at different inlet velocities, and the smaller the inlet velocity, the more rapid the temperature increased and the liquid volume fraction decreased. At the same inlet velocity, the difference between axial and radial temperature, axial turbulence intensity and axial and radial liquid volume of 3%, 5% and 7% NaCl was not significant, while the axial velocity and radial velocity of saline effluent with high concentration were slightly higher than other components, while the radial turbulence intensity was the opposite.
- coal chemical enterprises /
- saline wastewater /
- falling film evaporation /
- numerical simulation

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参考文献(16)

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