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

YUAN Yuxuan; SHEN Kai; CHEN Chao; WU Peng; LI Bo; YAO Quansheng; ZHANG Yaping

doi:10.13205/j.hjgc.202312021

Volume 41 Issue 12

Dec. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(12): 172-181

YUAN Yuxuan, SHEN Kai, CHEN Chao, WU Peng, LI Bo, YAO Quansheng, ZHANG Yaping. SIMULATION AND OPTIMIZATION OF FLUE GAS DESULFURIZATION WITH COMPLEXED IRON BASED ON ASPEN[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(12): 172-181. doi: 10.13205/j.hjgc.202312021

Citation:

YUAN Yuxuan, SHEN Kai, CHEN Chao, WU Peng, LI Bo, YAO Quansheng, ZHANG Yaping. SIMULATION AND OPTIMIZATION OF FLUE GAS DESULFURIZATION WITH COMPLEXED IRON BASED ON ASPEN[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(12): 172-181. doi: 10.13205/j.hjgc.202312021

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

doi: 10.13205/j.hjgc.202312021

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

Received Date: 2023-02-19
Available Online: 2024-03-08

Abstract

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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References(29)

References

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