混合料预先干燥对烧结NO<sub><i>x</i></sub>排放的影响

doi:10.13228/j.boyuan.issn0449-749x.20190476

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (954 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为利用烧结过程自身特性,实现烧结NO_x过程减排,通过烧结杯试验研究了烧结混合料热风预先干燥对烧结产质量指标和烧结烟气中NO_x排放浓度的影响。研究表明,随着烧结混合料热风预先干燥时间的增加,烧结矿转鼓强度和落下强度呈现总体增加的趋势,烧结成品率、垂直烧结速度和烧结利用系数呈先升高后下降的趋势;随着热风预先干燥时间的增加,烧结过程中烟气NO_x基准质量浓度和NO_x排放量会逐渐减少,当干燥时间达到30 min时,在不降低烧结矿产质量的情况下,在氧气体积分数为16% 的基准下NO_x质量浓度可降低20%左右,NO_x排放总量相比基准烧结减少22.82%。烧结混合料热风预先干燥可以减少烟气NO_x的排放,在烧结过程中实现NO_x减排的目的,为钢铁企业实现NO_x达标排放提供思路和方法。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	万军营
	陈铁军
	周仙霖
	罗艳红

关键词 ：烧结, 预先干燥, NO_x减排, 烧结烟气

Abstract：In order to utilize the characteristics of sintering itself and realize NO_x emission reduction in the sintering process, the influence of hot air pre-drying of sintering mixture on the production quality index of sintering and the NO_x emission concentration in the sintering flue gas was studied by sintering cup test under laboratory conditions. Through the analysis and research of the experimental results, it is shown that with the increase of the hot air drying time of the sintering mixture, the drum strength and the sinter falling strength of sinter show an overall increasing trend. The sintering yield, vertical sintering speed, and sintering utilization coefficient increased first and then decreased. With the increase of hot air drying time, the reference mass concentration of NO_x and NO_x emission of flue gas will gradually decrease in the sintering process. When the drying time reaches 30 min, the NO_x mass concentration can be reduced by about 20% under the 16% oxygen volume percent baseline, and the total NO_x emission is reduced by 22.82% compared with the baseline sintering while the quality and yield of sinter keep constant. Hot air drying of sintering mixture can reduce the emission of NO_x from flue gas and realize the purpose of NO_x emission reduction from the sintering process, which is a feasible and economical route for iron and steel enterprises to achieve the emission of NO_x up to the standard.

Key words： sintering pre-drying NO_x emissions sintering flue gas

收稿日期: 2019-10-25

引用本文:

万军营, 陈铁军, 周仙霖, 罗艳红. 混合料预先干燥对烧结NO_x排放的影响[J]. 钢铁, 2020, 55(7): 41-46. WAN Jun-ying, CHEN Tie-jun, ZHOU Xian-lin, LUO Yan-hong. Effect of pre-drying of mixture on emission of NO_x in sintering process[J]. Iron and Steel, 2020, 55(7): 41-46.

链接本文:

http://www.chinamet.cn/Jweb_gt/CN/10.13228/j.boyuan.issn0449-749x.20190476 或 http://www.chinamet.cn/Jweb_gt/CN/Y2020/V55/I7/41

[1] 于勇, 朱廷钰, 刘霄龙. 中国钢铁行业重点工序烟气超低排放技术进展[J]. 钢铁, 2019,54(9):1.(YU Yong, ZHU Ting-yu, LIU Xiao-long. Progress of ultra-low emission technology for key processes of iron and steel industry in China[J]. Iron and Steel,2019,54(9): 1.)
[2] 史夏逸,董艳苹,崔岩.烧结烟气脱硝技术分析及比较[J].中国冶金,2017,27(8):56.(SHI Xia-yi, DONG Yan-ping, CUI Yan. Analysis and comparison of sintering gas denitrification technology[J]. China Metallurgy, 2017, 27(8): 56.)
[3] 王海风,裴元东,张春霞,等.中国钢铁工业烧结/球团工序绿色发展工程科技战略及对策[J].钢铁,2016,51(10):1.(WANG Hai-feng, PEI Yuan-dong, ZHANG Chun-xia, et al. Green development of sintering/pellet procedure in China iron and steel industry[J]. Iron and Steel, 2016, 51(10): 1.)
[4] 刘文武,姜辉,金胜,等. 双压烧结余热回收的实际应用[J]. 冶金能源,2019,38(4):41. (LIU Wen-wu,JIANG Hui,JIN Sheng,et al. Application of double pressure sintering waste heat recover[J]. Energy for Metallurgical Industry,2019,38(4):41.)
[5] 刘征建,张建良,杨天钧.烧结烟气脱硫技术的研究与发展[J].中国冶金,2009,19(2):1.(LIU Zheng-jian, ZHANG Jian-liang, YANG Tian-jun. Research and development of sintering flue gas desulphurization technology[J]. China Metallurgy, 2009, 19(2): 1.)
[6] 高巨宝,樊越胜,邹峥,等.活性炭烟气脱硫脱氮技术的现状[J].电力建设,2006,27(2):66.(GAO Ju-bao, FAN Yue-sheng, ZOU Zheng, et al. Current status of activated carbon FGD and De-NO_x technology[J]. Electric Power Construction, 2006, 27(2): 66.)
[7] Raymundo Pinero E, Cazorla Amoros D, Linares Solano A. Temperature programmed desorption study on the mechanism of SO₂ oxidation by activated carbon and activated carbon fibres[J]. Carbon, 2001, 39(2): 231.
[8] 张威力,吴胜利,胡中杰. 活性焦法烧结烟气脱硝率影响因素解析[J].钢铁,2020,55(5):109.(ZHANG Wei-li,WU Sheng-li,HU Zhong-jie.Analysis of factors affecting activated coke denitration rate for sintering flue gas[J].Iron and Steel,2020, 55(5): 109.)
[9] 闫武装,谢桂龙,周景伟,等.低温氧化法用于烧结烟气脱硝的可行性探析[J].中国冶金, 2018, 28(5): 1.(YAN Wu-zhuang,XIE Gui-long,ZHOU Jing-wei,et al. Feasibility analysis of applying low temperature oxidation technology to sintering flue gas denitration[J]. China Metallurgy, 2018, 28(5): 1.)
[10] 李军,殷迪,王际童,等.活性焦表面改性及其常温催化氧化NO的性能研究[J].华东理工大学学报:自然科学版,2017(1):8.(LI Jun, YIN Di, WANG Ji-tong, et al. Surface modification of activated coke for NO oxidation at ambient temperature[J]. Journal of East China University of Science and Technology:Natural Science, 2017(1): 8.)
[11] LIU Z, LI Y, ZHU T, et al. Selective catalytic reduction of NO_x by NH₃ over Mn-promoted V₂O₅/TiO₂ catalyst[J]. Industrial and Engineering Chemistry Research, 2014, 53(33): 12964.
[12] 张亚平,郭婉秋,王龙飞,等.V₂O₅-CeO₂/TiO₂-ZrO₂催化剂表征及NH₃还原NO_x性能[J].催化学报,2015,36(10):1701.(ZHANG Ya-ping, GUO Wan-qiu, WANG Long-fei, et al. Characterization and activity of V₂O₅-CeO₂/TiO₂-ZrO₂ catalysts for NH₃-selective catalytic reduction of NO_x[J]. Chinese Journal of Catalysis, 2015, 36(10): 1701.)
[13] 阮志勇. 铁矿烧结烟气氧化-氨法协同脱硫脱硝[J].中国冶金,2018,28(5):72.(RUAN Zhi-yong. Simultaneously desulfurization and denitration of iron ore sintering flue gas based on pre-oxidized and ammonia process[J]. China Metallurgy, 2018, 28(5): 72.)
[14] LI J, CHANG H, MA L, et al. Low-temperature selective catalytic reduction of NO_x with NH₃ over metal oxide and zeolite catalysts—A review[J]. Catalysis Today, 2011, 175(1): 147.
[15] Ettireddy P R, Ettireddy N, Mamedov S, et al. Surface characterization studies of TiO₂ supported manganese oxide catalysts for low temperature SCR of NO with NH₃[J]. Applied Catalysis B: Environmental, 2007(76): 123.
[16] 江厚月.工业锅炉烟气臭氧法脱硝应用技术浅析[J].山东化工,2016,45(24):150.(JIANG Hou-yue. Application of ozone denitrification in industrial boiler flue gas[J]. Shandong Chemical Industry, 2016, 45(24): 150.)
[17] 王旭.烧结烟气脱硝工艺的探讨[J].资源节约与环保,2017(9):7.(WANG Xu. Discussion of denitration process of sintering flue gas[J]. Resources Economization and Environmental Protection,2017(9): 7.) .
[18] 潘建.铁矿烧结烟气减量排放基础理论与工艺研究[D].长沙:中南大学, 2007.(PAN Jian. Study on the Basic Theory and Technology of Reducing Emission of Iron Ore Sintering Flue Gas[D]. Changsha: Central South University, 2007.) .
[19] 李博.浅谈改善烧结料层透气性的几点措施[J].南钢科技,1995(3):7.(LI Bo. Several measures to improve the permeability of sintered material layer[J]. Nangang Technology, 1995(3): 7.)
[20] 张展雷,吕娟珍.提高烧结料层透气性的实践[J].烧结球团,2004,29(4):52.(ZHANG Zhan-lei, LÜ Juan-zhen. Practice of inceasing the ventilation of sintering mixture[J]. Sintering and Pelletizing, 2004, 29(4): 52.)
[21] 李文琦.优化烧结料层透气性和温度场的研究[D].长沙:中南大学,2012.(LI Wen-qi. Study on Optimizing Permeability and Temperature Field of Sintering Layer[D]. Changsha: Central South University, 2012.)
[22] Morioka K, Inaba S, Shimizu M, et al. Primary application of the "In-Bed-de NO_x" process using Ca-Fe oxides in iron ore sintering machines[J]. ISIJ International, 2000, 40(3):280.
[23] YU Z Y, FAN X H, GAN M, et al. Effect of Ca-Fe oxides additives on NO_x reduction in iron ore sintering[J]. Journal of Iron and Steel Research, International, 2017, 24(12): 1184.
[24] El Geassy A A. Influence of doping with CaO and/or MgO on stepwise reduction of pure hematite compacts[J]. Ironmaking and Steelmaking, 2013, 26(1): 41.