Numerical evaporation characteristics of desulfurization wastewater by rotating spray with different hot air distributor structure

被引：0
|
作者：
Li F. [1 ]
Chen H. [1 ]
Sun Z. [2 ]
Gu X. [1 ]
Bai Y. [1 ]
Gao F. [1 ]
Yang L. [2 ]
机构：
[1] Datang Environment Industry Group Co., Ltd, Beijing
[2] Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Jiangsu, Nanjing
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2020年 / 39卷
关键词：
deflector; desulfurization wastewater; flow field; hot air distributor; spray evaporation;
D O I：
10.16085/j.issn.1000-6613.2020-0867
中图分类号：
学科分类号：
摘要：
A two-phase flow model for gas and liquid including the heat and mass transfer between them was established, and the desulfurization wastewater spray evaporation process in a 300MW power plant was studied by simulation. The influence of angle and number of deflectors on the flow field in drying tower and the movement and evaporation of wastewater droplets was investigated. The results showed that the influence of the angle of outer deflectors on the flow field in the drying tower is greater than that of the inner deflectors. With the increase of the angle of outer deflectors, the rotation effect of flue gas entering the spray drying tower is more obvious, and the rotation effect of flue gas is the best when it is 32°. With the increase of the angle of inner deflectors, the maximum distance of droplets axial movement decreases. Meanwhile, the change of the angle of inner deflectors has a greater influence on the complete evaporation time of the droplets in drying tower than that of the outer deflectors, and the evaporation time of droplets is the shortest when the angle of inner deflectors is 0°. The number of inner deflectors has little influence on the flow field, droplet movement or evaporation in the drying tower. With the increase of the number of inner deflectors, the flow field, droplets movement distance and complete evaporation time in the drying tower tend to be stable. Considering the flue gas diversion and flue gas pressure loss, it is suggested that the number of inner diversions should be 24. © 2020, Chemical Industry Press Co., Ltd. All rights reserved.
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页码：385 / 392
页数：7
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