基于ASPEN的络合铁法高炉煤气脱硫模拟与优化  

SIMULATION AND OPTIMIZATION OF FLUE GAS DESULFURIZATION WITH COMPLEXED IRON BASED ON ASPEN

作　　者：袁宇轩 沈凯[1] 陈超 吴鹏 李博 姚全胜 张亚平[1] YUAN Yuxuan;SHEN Kai;CHEN Chao;WU Peng;LI Bo;YAO Quansheng;ZHANG Yaping(School of Energy and Environment,Southeast University,Nanjing 214135,China;Jiangsu Langrun Environmental Protection Technology Co.,Ltd.,Jiangyin 214400,China)

机构地区：[1]东南大学能源与环境学院,南京214135 [2]江苏朗润环保科技有限公司,江苏江阴214400

出　　处：《环境工程》2023年第12期172-181,共10页Environmental Engineering

基　　金：江苏省重点研发计划(BE2022832)。

摘　　要：针对高炉煤气催化水解后的高浓度H2S处理需求,利用ASPEN软件的ELECNRTL物性方法和JOBACK基团贡献法估算以乙二胺四乙酸为配体原料的EDTA络合铁物性参数。以填料吸收塔和曝气再生槽2个反应器为核心,搭建了整套高炉煤气络合铁湿法吸收H2S与络合铁脱硫剂曝气氧化再生的反应流程工艺的仿真模型。通过单一因素分析发现,在1000 m^(3)/h的烟气流量下,pH=8时,填料塔与再生槽的反应温度均为25℃,反应压力均为0.1 MPa,液气比为5∶1,络合铁浓度为0.05 mol/L,停留时间为40 s,n(O_(2))∶n(络合亚铁)为4∶1时,此模型能在成本与效率之间实现最优化,最终可以实现99.5%的H2S吸收率和97.6%的络合铁再生率。在此基础上使用正交分析对各因素的影响度进行分析,并将模型应用于实际示范工程的设计。结果表明,工程运行良好,与模型的预期值相近,表明该模型具有良好的应用价值,可用于指导工程设计与优化。In order to meet the treatment requirement of high concentration H2S after catalytic hydrolysis of blast furnace gas,the ELECNRTL physical property method of ASPEN and JOBACK group contribution method were used to estimate the physical property parameters of EDTA complexed iron with ethylenediamine tetraacetic acid as the ligand raw material.The simulation model of the complete wet desulphurization process with EDTA complexed iron and oxidation regeneration was built.And two reactors,the packed absorption tower,and the aeration regeneration tank,were set as the core unit.Through the single factor analysis,it was found that under the flue gas flow rate of 1000 m^(3)/h,when pH=8,the reaction temperature of the packed column and the regeneration tank was 25℃,the reaction pressure was 0.1 MPa,the liquid-gas ratio was 5∶1,the concentration of iron complexation was 0.05 mol/L,the residence time was 40 s and the molar ratio of O_(2)-ferrous complexation was 4∶1,the model could be optimized with the balance of cost and efficiency.Under these parameters,the H2S absorption rate and the complex ferrous regeneration rate achieved 99.5%and 97.6%,respectively.On this basis,the orthogonal analysis was used to explore the influence of each factor and the model was applied to the design of the actual demonstration project.The project operated well and its result was like the expected values of the model.It indicated that the model has good application potential and can be used to guide engineering design and optimization.

关 键 词：ASPEN 模拟 H2S 络合铁 正交 优化 

分 类 号：X757[环境科学与工程—环境工程] TF53[冶金工程—钢铁冶金]