石灰石—湿法烟气脱硫吸收塔仿真模型设计与研究

doi:10.16182/j.issn1004731x.joss.17-0088

系统仿真学报 ›› 2019, Vol. 31 ›› Issue (2): 238-247.doi: 10.16182/j.issn1004731x.joss.17-0088

石灰石—湿法烟气脱硫吸收塔仿真模型设计与研究

张悦, 韩璞, 张想

华北电力大学河北省发电过程仿真与优化控制工程技术研究中心,保定 071003

收稿日期:2017-02-27 修回日期:2017-04-26 出版日期:2019-02-15 发布日期:2019-02-15
作者简介:张悦(1980-),男,河北安国,博士,讲师,研究方向为复杂系统建模与控制;韩璞(1959-2017),男,河北平泉,学士,教授,研究方向为现代控制理论。
基金资助:
中央高校基本科研业务费专项资金(2015MS65)

Design and Research on Simulation Model of Limestone-Wet Flue Gas Desulfurization Absorption Tower

Zhang Yue, Han Pu, Zhang Xiang

Hebei Engineering Research Center of Simulation & Optimized Control for Power Generation, North China Electric Power University, Baoding 071003, China

Received:2017-02-27 Revised:2017-04-26 Online:2019-02-15 Published:2019-02-15

摘要/Abstract

摘要： 石灰石—湿法烟气脱硫涉及的传质及化学反应过程非常复杂,深入研究其内部机理,建立高精度的机理模型,有助于提高脱硫现场的运行水平。对吸收塔进行区域划分,明确不同区域的建模目标。二氧化硫吸收区依据浆液滴下落距离及暴露时间细划成不同高度的“小室”,根据“小室”内浆液滴的运动特征及传质过程,计算“小室”内脱硫效率及压降,进而获得整个区域的吸收效率及压降计算方法;浆液区PH值被描述成浆液中主要组分浓度的函数;除雾区压降依据烟气流速分成低速和高速两段计算。借助具体实例仿真,验证了模型的精度。

关键词: 石灰石—湿法烟气脱硫;, 吸收塔, 脱硫效率, 压降, 机理建模

Abstract: The mass transfer and chemical reaction processes of wet flue gas desulfurization (FGD) are very complex. It is helpful to improve the operation level of desulfurization site by studying the internal mechanism and establishing a high precision mechanism model. The absorption tower is divided into some regions, and the modeling targets in different regions are determined. The sulfur dioxide absorption region is divided into different heights of the "cell" by the slurry droplet falling distance and exposure time. According to the motion characteristics and mass transfer process, the desulfurization efficiency and pressure drop are calculated, and the absorption efficiency calculation method and the pressure drop across the region are obtained; the PH value of the slurry zone is described as a function of the concentration of the major components in the slurry; the mist pressure drop according to velocity of flue gas is divided into low and high speeds for two stage calculations. The accuracy of the model is verified by simulation.

Key words: limestone wet flue gas desulfurization, absorption tower, desulfurization efficiency, pressure drop, mechanism model

中图分类号:

TP391.9

张悦, 韩璞, 张想. 石灰石—湿法烟气脱硫吸收塔仿真模型设计与研究[J]. 系统仿真学报, 2019, 31(2): 238-247.

Zhang Yue, Han Pu, Zhang Xiang. Design and Research on Simulation Model of Limestone-Wet Flue Gas Desulfurization Absorption Tower[J]. Journal of System Simulation, 2019, 31(2): 238-247.

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石灰石—湿法烟气脱硫吸收塔仿真模型设计与研究

Design and Research on Simulation Model of Limestone-Wet Flue Gas Desulfurization Absorption Tower

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