基于ASPEN的络合铁法高炉煤气脱硫模拟与优化

袁宇轩; 沈凯; 陈超; 吴鹏; 李博; 姚全胜; 张亚平

doi:10.13205/j.hjgc.202312021

基于ASPEN的络合铁法高炉煤气脱硫模拟与优化

doi: 10.13205/j.hjgc.202312021

袁宇轩¹,
沈凯¹,
陈超¹,
吴鹏¹,
李博²,
姚全胜²,
张亚平^1, ,

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

基金项目:

江苏省重点研发计划(BE2022832)

详细信息

作者简介:
袁宇轩(1997-),男,硕士研究生。220204886@seu.edu.cn

通讯作者:
张亚平(1979-),女,教授,主要研究方向为环境催化材料与污染土壤处理处置与资源化。amflora@seu.edu.cn

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出版历程
- 收稿日期: 2023-02-19
- 网络出版日期: 2024-03-08

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

1. School of Energy and Environment, Southeast University, Nanjing 214135, China;
2. Jiangsu Langrun Environmental Protection Technology Co., Ltd., Jiangyin 214400, China

摘要

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 m³/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(O₂)∶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。
- ASPEN /
- 模拟 /
- H₂S /
- 络合铁 /
- 正交 /
- 优化
Abstract: 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 m³/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 O₂-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.
- ASPEN /
- simulation /
- hydrogen sulfide /
- complexed iron /
- orthogonal /
- optimization

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