基于LCA法评价钢铁行业焦炉烟气超低排放改造工艺

史美学; 孙斯佳; 肖利平; 邓志毅; 赵成; 陈志航

doi:10.13205/j.hjgc.202510024

基于LCA法评价钢铁行业焦炉烟气超低排放改造工艺

doi: 10.13205/j.hjgc.202510024

1. 湘潭大学环境与资源学院, 湖南湘潭 411105;
2. 邵阳职业技术学院, 湖南邵阳 422004;
3. 生态环境部华南环境科学研究所广东省水与大气污染防治重点实验室广东省大气污染控制工程实验室, 广州 510535

基金项目:

湖南省生态环境厅环保科研项目（HNGR-2021ZC110）；湖南省重点研发计划（2018SK2013，2018SK2024）

详细信息

作者简介:
史美学（1997—），男，硕士研究生，主要研究方向为废物资源化新技术。593806549@qq.com

通讯作者:
肖利平（1972—），女，博士，教授，主要研究方向为水污染控制工程和废物资源化新技术。xiaoliping@xtu.edu.cn

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出版历程
- 收稿日期: 2023-12-26
- 录用日期: 2024-03-05
- 修回日期: 2024-01-23
- 网络出版日期: 2025-12-03
- 刊出日期: 2025-10-01

Evaluation of ultra-low emission transformation process of coke oven flue gas in iron and steel industry using LCA method

1. College of Environment and Resources, Xiangtan University, Xiangtan 411105, China;
2. Shaoyang Poletechnic, Shaoyang 422004, China;
3. Guangdong Key Lab of Water & Air Pollution Control, Guangdong Province Engineering Laboratory for Air Pollution Control, South China Institute of Environmental Science, MEE, Guangzhou 510535, China

摘要

摘要: 焦炉烟气超低排放改造是长流程钢铁企业的重点、难点之一。采用量化的评价手段来合理选择和优化焦炉烟气超低排放改造工艺，是实现焦炉烟气稳定、高效达到超低排放标准的有益技术支撑。以某大型钢铁企业S现有的2种焦炉烟气超低排放改造工艺为研究对象，在实地调研的基础上，采用生命周期评价法构建相关的模型，借助Simapro 软件计算，获得了2种工艺量化的环境影响结果。结果表明：相较于密相干脱硫+陶瓷滤筒脱硫除尘脱硝一体化工艺（B工艺），活性焦吸附法脱硫脱硝工艺（A工艺）对环境的影响减少33.33%，是更值得推荐的焦炉烟气超低排放改造工艺；2种工艺潜在环境影响主要包括人体致癌毒性、臭氧形成（人类健康）、淡水生态毒性、淡水富营养化和海洋生态毒性等方面；焦炉煤气和电力是两种工艺造成环境影响共同的关键因素；针对以上关键因素，对2种工艺在环境影响方面的改进提出了初步建议，可为焦炉烟气超低排放改造工艺的选择和优化提供参考。
- 钢铁行业 /
- 焦炉烟气 /
- 超低排放 /
- 生命周期评价 /
- 模型构建
Abstract: The ultra-low emission transformation treatment of coke oven flue gas is one of the key projects in the steel industry. The selection and optimization of the treatment process are crucial to achieving ultra-low emission modification goals， which can be evaluated using quantitative methods. In this paper， two treatment processes of existing coke oven flue gas ultra-low emission modification in a large steel company（Company S） were considered as the research objects. Based on field investigations， the life cycle assessment（LCA） method was adopted to build a relevant model and the quantitative impact results of two processes were calculated by Simapro software. The results showed that Process A （activated coke adsorption desulfurization and denitration） achieved a 64.56% reduction in environmental impact， compared to Process B （dense-flow absorber flue gas desulfurization + ceramic filter cartridge desulfurization and denitration integrated process）， representing an optimized ultra-low emission solution for coke oven flue gas treatment. The potential environmental impacts of two processes were mainly distributed in human carcinogenicity， ozone formation （impacts on human health）， freshwater ecotoxicity， freshwater eutrophication， and marine ecotoxicity. Furthermore， the key affecting factors for both processes were coke oven gas and electricity. In view of the two key factors， preliminary suggestions were proposed on improving the environmental impacts of both processes， which could serve as a reference for the selection and optimization of ultra-low emission transformation processes for coke oven flue gas.
- iron and steel industry /
- coke oven flue gas /
- ultra-low emission /
- life cycle assessment /
- modeling

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