脱硫剂喷吹耦合活性焦技术降低烧结烟气SO<sub>2</sub>

doi:10.13228/j.boyuan.issn1006-9356.20230382

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Abstract A large amount of air pollutants such as sulfur dioxide (SO₂), nitrogen oxides (NO_x), and dust can be produced in the process of iron ore sintering, which is the main source of steel pollutant emissions. A certain steel plant′s 435 m² sintering machine employs a countercurrent integrated process with activated coke for the reduction of pollutant emissions. The emission control equipment has experienced prolonged operation, leading to aging issues. Consequently, the concentration of SO₂ has exceeded the maximum threshold that the emission control system can withstand. Following emission control, the SO₂ concentration in the exhaust gas has surpassed acceptable limits, and it has adversely impacted the denitrification capability of the activated coke. In order to alleviate the pressure of active coke emission reduction, a desulfurizer injection emission reduction system was set up in the sintering flue, forming combined emission reduction technology of "process optimization" and "end-of-pipe treatment" for flue gas pollutants. The practical application results demonstrate that, following the injection of desulfurizing agents, the SO₂ concentration in the inlet flue gas of activated coke decreases from 853.78 mg/m³ to 668.76 mg/m³, meeting the operational conditions required for the normal operation of the activated coke desulfurization and denitrification process. This effectively addresses the issue of excessive SO₂ concentration. The dust concentration at the activated coke′s inlet increases from 25.48 mg/m³ to 31.39 mg/m³, with relatively minor increment in dust content in the exhaust gas. The emission control process′s desulfurization and denitrification efficiency remain unaffected by these changes and not experience any adverse effects. After the flue gas is reduced by the activated carbon system, the ultra-low emission requirement is reached. This study has reference value for the field industrial application of sintering flue gas pollutant treatment technology.

Key words： sintering flue gas desulfurization desulfurizer injection activated coke

Received: 12 June 2023

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	Articles by authors
	LI Jinhui
	TAO Jiajie
	YU Yang
	LUO Kaicheng
	CAI Yinqing
	LONG Hongming

Cite this article:

LI Jinhui,TAO Jiajie,YU Yang等. SO₂ reduction in sintering flue gas by desulfurizer injection and activated coke technology[J]. China Metallurgy, 2023, 33(11): 151-157.

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http://www.zgyj.ac.cn/EN/10.13228/j.boyuan.issn1006-9356.20230382 OR http://www.zgyj.ac.cn/EN/Y2023/V33/I11/151

[1]	周茂军,张代华.宝钢烧结烟气超低排放技术集成与实践[J].钢铁,2020, 55(2): 144.
[2]	边瑶,王博,沈伯雄,等.钢铁烧结烟气多污染物协同控制研究进展[J].现代化工, 2022, 42(12): 24.
[3]	龙红明,丁龙,陶家杰,等.烧结烟气脱硝废弃钒钨钛催化剂资源化利用途径分析[J].钢铁, 2022, 57(7): 162.
[4]	龙红明,丁龙,赵贺喜,等.典型钢铁生产流程烟气中CO减排研究进展[J].钢铁,2023,58(8):1.
[5]	朱廷钰,刘霄龙.中国钢铁行业“超低排放”向“减污降碳”过渡的技术思考[J].过程工程学报, 2022, 22(10): 1360.
[6]	蔡九菊.钢铁工业的空气消耗与废气排放[J].钢铁, 2019, 54(4): 1.
[7]	陈伟,陈媛,田朝.烧结烟气脱硫脱硝一体化技术探究[J].山西冶金, 2021, 44(4): 61.
[8]	龙红明,丁龙,钱立新,等.烧结烟气中NOx和二噁英的减排现状及发展趋势[J].化工进展,2022,41(7):3865.
[9]	齐亚兵,唐承卓,贾宏磊.工业烟气湿法脱硫技术的发展现状及研究新进展[J].材料导报, 2022, 36(增刊1): 88.
[10]	付瑞超,罗春欢,苏庆泉.钙基半干法燃煤烟气脱硫技术的影响因素[J].环境工程学报, 2022, 16(4): 1248.
[11]	LIU F, CAI M, LIU X,et al. O3 oxidation combined with semi-dry method for simultaneous desulfurization and denitrification of sintering/pelletizing flue gas[J]. Journal of Environmental Sciences, 2021, 104: 253.
[12]	常治铁. SDS+SCR工艺在焦炉烟气脱硫脱硝中的应用[J].中国冶金, 2019, 29(10): 65.
[13]	王雅新,刘俊,易红宏,等.钢铁行业烧结烟气脱硫脱硝技术研究进展[J].环境工程, 2022, 40(9): 253.
[14]	BO X, LI Z, QU J, et al. The spatial-temporal pattern of sintered flue gas emissions in iron and steel enterprises of China[J]. Journal of Cleaner Production,2020, 266: 121667.
[15]	柳领君,张玉亭,魏全伟.烧结/球团烟气活性焦脱硫脱硝技术研究[J].环境生态学, 2020, 2(9): 66.
[16]	向思羽,张朝晖,邢相栋,等.烧结烟气脱硫脱硝活性炭的研究进展[J].钢铁研究学报, 2023, 35(3): 233.
[17]	陈新.烧结烟气活性焦脱硫再生SO2烟气制酸装置设计与优化[J].硫酸工业, 2017(11): 24.
[18]	LIU Q, YANG J, LIH, et al. Activated carbon prepared from catechol distillation residue for efficient adsorption of aromatic organic compounds from aqueous solution[J]. Chemosphere, 2021, 269: 128750.
[19]	LI X, ZHANG L, YANG Z, et al. Hydrophobic modified activated carbon using PDMS for the adsorption of VOCs in humid condition[J]. Separation and Purification Technology, 2020, 239: 116517.
[20]	莫鸿飞.焦化脱硫废液采用湿法制酸工艺的探讨[J].硫酸工业, 2021(3): 30.
[21]	卢建光,阎占海,邵久刚,等.逆流式活性炭净化烟气工艺在邯钢烧结机的应用[J].中国钢铁业, 2019(3): 52.
[22]	ABDULRASHEED A A, JALIL A A, TRIWAHYONO S, et al. Surface modification of activated carbon for adsorption of SO2 and NOx: A review of existing and emerging technologies[J]. Renewable and Sustainable Energy Reviews, 2018, 94: 1067.
[23]	王新东,侯长江,田京雷.钢铁行业烟气多污染物协同控制技术应用实践[J].过程工程学报, 2020, 20(9): 997.
[24]	中国金属学会. 关于钢铁企业烧结、焦化烟气超低排放情况的调研报告[J].中国冶金, 2019, 29(7): 79.
[25]	唐昊,李慧,杨江毅,等. NH3-SCR工艺中硫酸铵盐的生成与分解机理研究进展[J].化工进展, 2018, 37(3): 822.
[26]	王梁,赵海亮.烧结活性焦脱硫脱硝工程存在的问题及应对措施[J].烧结球团, 2022, 47(3): 104.
[27]	陶家杰,李俊杰,龙红明,等. (NH4)2SO4对烧结烟气脱硫活性炭的中毒机理[J/OL].钢铁[2023-06-30]. https://doi.org/10.13228/i.boyuan.issn0449-749x.20230110.
[28]	张家玮,张玉亭.烧结干法脱硫(SDS)技术的应用[C]//河北省环境科学学会2021年科学技术年会论文集.石家庄:河北省环境科学学会, 2021:5
[29]	吕旭东,吴胜利,张威力.吸附塔工艺参数对活性炭烧结烟气脱硫的影响[J].中国冶金, 2020, 30(1): 88.