Mathematical modeling for height of absorption region in spray tower for limestone-gypsum wet flue gas desulfurization

ZHU Jie; YE Shichao; WU Zhenyuan; BAI Jie; ZHENG Yijun

doi:10.3969/j.issn.0438-1157.2014.08.006

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Mathematical modeling for height of absorption region in spray tower for limestone-gypsum wet flue gas desulfurization

更新时间：2025-12-10

- Mathematical modeling for height of absorption region in spray tower for limestone-gypsum wet flue gas desulfurization
- CIESC Journal Issue 8, Pages: 2896-2901(2014)
- 作者机构：
  
  四川大学化学工程学院,四川,成都,610065
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.08.006
  CLC： Q028.17
- Online First：05 August 2014，
  
  Published：05 August 2014
- 稿件说明：
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ZHU Jie, YE Shichao, WU Zhenyuan, et al. Mathematical modeling for height of absorption region in spray tower for limestone-gypsum wet flue gas desulfurization[J]. CIESC Journal, 2014, (8): 2896-2901.
DOI：

ZHU Jie, YE Shichao, WU Zhenyuan, et al. Mathematical modeling for height of absorption region in spray tower for limestone-gypsum wet flue gas desulfurization[J]. CIESC Journal, 2014, (8): 2896-2901. DOI： 10.3969/j.issn.0438-1157.2014.08.006.

摘要

从液滴受力分析入手，建立了喷淋塔的比表面积和传质速率方程，将吸收区划分为变速段与恒速段，推导了吸收区高度的计算模型，引用工业脱硫塔实际的工艺数据验证了模型的正确性，讨论了操作参数对吸收区高度的影响。结果表明，增加喷淋密度、提高吸收液pH值、减小液滴直径，均可降低吸收区高度；提高操作气速、增大烟气入口SO2浓度，吸收区高度增加；脱硫率随塔高而增加，但当脱硫率超过90%以后，增加塔高对脱硫率的影响不大。

Abstract

Specific surface area and mass transfer rate in spray tower were studied by considering the forces acting on a droplet. Absorption region was divided into accelerating segment and constant speed segment

and a segmentation calculation model for the height of absorption region was developed

which was verified by the data of four industrial desulfurization systems. The effects of operating parameters on the height of absorption region were investigated. The results show that height of absorption region decreases with the decrease of spray density and pH value of absorbent

and increases with the decrease of droplet diameter

superficial gas velocity and inlet SO2 concentration. The desulfurization efficiency increases with the height of absorption region. When the desulfurization efficiency reaches above 90%

the height of absorption region only has a slightly influence on the efficiency.

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