Modeling for the Absorption of SO2 in Ｆlue Gas with Landfill Leachate Coupled with Desorption of Ammonia

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Modeling for the Absorption of SO2 in Ｆlue Gas with Landfill Leachate Coupled with Desorption of Ammonia

更新时间：2023-11-28

- Modeling for the Absorption of SO2 in Ｆlue Gas with Landfill Leachate Coupled with Desorption of Ammonia
- Advanced Engineering Sciences Vol. 38, Issue 2, Pages: 47-54(2006)
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- Published：2006，
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苏仕军,万海清,朱家骅.城市垃圾渗滤液烟气脱硫体系气液吸收与解吸过程的数学模拟[J].工程科学与技术,2006,38(2):47-54.

Modeling for the Absorption of SO2 in Ｆlue Gas with Landfill Leachate Coupled with Desorption of Ammonia. [J]. Advanced Engineering Sciences 38(2):47-54(2006)
苏仕军,万海清,朱家骅.城市垃圾渗滤液烟气脱硫体系气液吸收与解吸过程的数学模拟[J].工程科学与技术,2006,38(2):47-54. DOI：

Modeling for the Absorption of SO2 in Ｆlue Gas with Landfill Leachate Coupled with Desorption of Ammonia. [J]. Advanced Engineering Sciences 38(2):47-54(2006) DOI：

摘要

中文摘要: 针对垃圾渗滤液烟气脱硫体系气液吸收和解吸过程反应复杂的特性，基于经典双膜传质理论，建立了填料塔内湿法烟气脱硫模型，包括填料塔反应器模型和烟气SO2在垃圾渗滤液中吸收并伴随氨的解吸过程的数学模型。模型将系统内复杂的多组分反应分解为独立的离子反应，从而在确定的独立反应的条件下，可使模型的数值求解不依赖于特殊的假设条件以及可变的操作条件。根据工艺研究的实验条件对模型赋初值，结合模型参数估值确定适宜的边界条件，采用Maple 8.0对模型方程进行求解，得到了液膜内各组份的浓度分布特性曲线，以及气相分压、pH值、传质阻力、传质速率、吸收增强因子等沿塔高的分布特性，结果表明模型预测结果和实验结果吻合良好。所建立的模型为本工艺过程和其它湿法烟气脱硫过程的传质-反应现象提供了一个定量的理论分析和工程设计基础。

Abstract

Abstract:Based on the two-film mass transfer theory

a model for SO2 absorption in flue gas with landfill leachate coupled with ammonia desorption was put forward

which includes diffusion and reaction processes

and assumes that thermodynamic equilibrium among the reacting species exists in the bulk liquid. The rigorous numerical approach only requires the definition of individual reactions in the system

and the solution is independent of specific assumptions made

or operational variables. The model was validated using experimental conditions in packed column. The equations in the model could be solved using Maple 8.0 with boundary conditions obtained by rational estimation of the parameters involved. Then the model was used to calculate concentration profiles in the liquid film

partial pressure

mass transfer rate

pH profiles

enhancement factor and individual film resistances along the column. The calculated results were compared to experimental data and a good agreement was achieved.The study provided a basic study for theoretical analysis and engineering design of the process of SO2 absorption into flue gas with landfill leachate coupled with ammonia desorption and other wet FGD process.

关键词

烟气脱硫垃圾渗滤液数值模拟二氧化硫

Keywords

flue gas desulfurizationlandfill leachatenumerical simulationsulfur dioxide

references

Su Dan,Su Shijun,Zhu Jiahua.Experimental study on the system of flue gas wet desulfurization with landfill leachate[J].Techniques and Equipment for Environmental Pollution Control,2003,4(5):9-11.[苏丹,苏仕军,朱家骅.垃圾渗滤液烟气脱硫体系的实验研究[J].环境污染治理技术与设备,2003,4(5):9-11.]

Wan Haiqing,Su Shijun,Zhu Jiahua,et al.Study on the factors affecting growth of the sulphate-reducing bacteria and its biological desulfurization capability[J].Journal of Chemical Engineering of Chinese Universities,2004,18(2):218-222.[万海清,苏仕军,朱家骅,等.硫酸盐还原菌的生长影响因子及脱硫性能的研究[J].高校化学工程学报,2004,18(2):218-222.]

Su Shijun.Study on the process of SO2 absorption into landfill leachate coupled with ammonia desorption[D].Chengdu:Sichuan University,2004.[苏仕军.垃圾渗滤液烟气脱硫体系气液吸收与解吸过程研究[D].成都:四川大学,2004.

Kenig E Y,Schneider R,Górak A.Multicomponent unsteady-state film model:a general analytical solution to the linearized diffusion-reaction problem[J].Chemical Engineering Science,2001,83:85-94

Huss A Jr,Lim P K,et al.Oxidation of aqueous sulphur dioxide.1.

柯斯乐 E L.扩散:流体系统中的传质[M].王宇新,姜忠义,译.北京:化学工业出版社,2002:222-226.

肖文德,吴志泉.二氧化硫脱除与回收[M].第1版.北京:化学工业出版社,2001:133-136.

Onda K,Sada E,Okumoto Y.Mass transfer coefficients between gas and liquid phases in packed columns[J].Journal of Chemical Engineering of Japan,1968,1(1):62-66.

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国家烟气脱硫工程技术研究中心四川大学环境工程系

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