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浙江大学学报(工学版)
浙江大学学报(工学版)  2020, Vol. 54 Issue (10): 1986-1992    DOI: 10.3785/j.issn.1008-973X.2020.10.016
能源工程、机械工程     
水泥炉窑SNCR-SCR联合脱硝中试实验研究
韦彦斐1,3(),周荣2,周敏捷2,高翔1
1. 浙江大学 能源工程学院，浙江 杭州 310027
2. 浙江省环境保护科学设计研究院，浙江 杭州 310012
3. 浙江省环境科技有限公司，浙江 杭州 311100
Pilot study on combined denitration of SNCR-SCR system in cement furnace
Yan-fei WEI1,3(),Rong ZHOU2,Min-jie ZHOU2,Xiang GAO1
1. College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
2. Environmental Science Research and Design Institute of Zhejiang Province, Hangzhou 310012, China
3. Zhejiang Environmental Technology Limited Company, Hangzhou 311100, China
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摘要：

以水泥炉窑氮氧化物（NOx）脱除为研究对象，分析烟气温度、入口NOx质量浓度、氨氮摩尔比（NSR）、催化剂装载量和积灰时间等对选择性催化还原脱硝技术(SCR)性能的影响，研究水泥炉窑SNCR-SCR联合脱硝工艺. 依托浙江省某水泥熟料生产线，通过在已配套的SNCR脱硝装置后端引入SCR反应器深化烟气脱硝过程，建立体积流量为10 000 m3/h的SNCR-SCR联合脱硝系统. 结果表明，在烟气体积流量为10 000 m3/h，入口温度为340 °C，入口NOx质量浓度为200~320 mg/m3的条件下，选择NSR为0.85~1.00、催化剂用量为8.1 m3时，SCR处理系统出口NOx排放质量浓度为23.4 mg/m3，氨排放质量浓度为0.98 mg/m3，SCR系统脱硝率可达90.4 %. 中试实验NOx的排放质量浓度、氨排放质量浓度均远优于《水泥工业大气污染物排放标准》（GB4915—2013）的规定，证明可实现水泥炉窑烟气氮氧化物的超低排放.
关键词： 水泥炉窑;  烟气脱硝;  NOx;  SCR;  SNCR-SCR    
Abstract:

The effects of flue gas temperature, inlet NOx mass concentration, ammonia-nitrogen ratio (NSR), catalyst loading and ash deposit time on the selective catalytic reduction (SCR) process were analyzed for the removal of nitrogen oxides (NOx) from cement furnace kiln. The characteristics of the SNCR-SCR combined denitrification process in cement furnaces were analyzed. The SNCR-SCR combined denitrification system of 10 000 m3/h was established based on a cement clinker production line in Zhejiang Province to strengthen the flue gas denitrification process by introducing an SCR device at the back end of a supporting SNCR denitrafication device. Results showed that the NOx emission mass concentration and ammonia mass concentration were 23.4 mg/m3 and 0.98 mg/m3 after continuous operation of SCR under 0.85~1.00 NSR, 8.1 m3 catalyst dosage when the flue gas volume was 10 000 m3/h with an inlet NOx mass concentration of 200~320 mg/m3 at 340 °C. The SCR segment denitrafication efficiency can reach 90.4%. These measured NOx emission mass concentration and ammonia escape mass concentration in the pilot test are far superior to those in the “Cement Industry Air Pollutant Emission Standard” (GB4915—2013), which proves that ultra-low emissions of the main pollutants in the flue gas of cement furnace can be realized.
Key words: cement furnace    flue gas denitrification    NOx    SCR    SNCR-SCR
收稿日期: 2020-02-29 出版日期: 2020-10-28
CLC:  X 511  
基金资助: 浙江省科技厅资助项目（2016F50026）
作者简介: 韦彦斐（1969—），男，正高级工程师，博士生，从事非电行业大气污染控制的研究. orcid.org/0000-0002-0955-3467. E-mail： weiyf211@163.com
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引用本文:

韦彦斐,周荣,周敏捷,高翔. 水泥炉窑SNCR-SCR联合脱硝中试实验研究[J]. 浙江大学学报(工学版), 2020, 54(10): 1986-1992.

Yan-fei WEI,Rong ZHOU,Min-jie ZHOU,Xiang GAO. Pilot study on combined denitration of SNCR-SCR system in cement furnace. Journal of ZheJiang University (Engineering Science), 2020, 54(10): 1986-1992.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2020.10.016    或    http://www.zjujournals.com/eng/CN/Y2020/V54/I10/1986

图 1  SNCR-SCR工艺流程图
图 2  SCR脱硝中试装置
图 3  温度对SCR脱硝性能的影响
图 4  入口NOx质量浓度波动对脱硝性能的影响
图 5  NSR对脱硝率及氨排放质量浓度的影响
图 6  催化剂装载量对脱硝率的影响
图 7  积灰时间对脱硝性能的影响
图 8  水泥炉窑SCR脱硝168 h性能曲线
1 中华人民共和国国家统计局. 中国统计年鉴 2005[R]. 北京: 中国统计出版社, 2005.
2 中华人民共和国国务院. 国务院关于印发国家环境保护“十二五”规划的通知[R/OL]. (2011-12-20). http://www.gov.cn/zwgk/2011-12/20/content_2024895.htm.
3 中华人民共和国生态环境部. 重点区域大气污染防治“十二五”规划[R/OL]. (2012-10-29). http://www.mee.gov.cn/gkml/hbb/bwj/201212/W020121205566730379412.pdf.
4 燃煤电厂超低排放烟气治理工程技术规范: HJ2053-2018 [S]. 北京: 中华人民共和国生态环境部, 2018.
5 中华人民共和国生态环境部. 关于推进实施钢铁行业超低排放的意见[R/OL]. (2019-04-28). http://www.mee.gov.cn/xxgk2018/xxgk/xxgk03/201904/t20190429_701463.html?keywords=关于推进实施钢铁行业超低排放的意见.
6 丁平华, 田学勤, 郎营 基于减排形势和技术应用分析的水泥工业污染减排研究[J]. 环境保护, 2014, 42 (21): 46- 50
DING Ping-hua, TIAN Xue-qin, LANG Ying The research on pollutants emission reduction of cement industry by analyzing it's developmental status and technique applying[J]. Environmental Protection, 2014, 42 (21): 46- 50
7 蒋春来, 宋晓晖, 钟悦之, 等 2010~2015年我国水泥工业NOx排放清单及排放特征 [J]. 环境科学, 2018, 39 (11): 4841- 4848
JIANG Chun-lai, SONG Xiao-hui, ZHONG Yue-zhi, et al Emissions inventory and characteristics of NOx from cement industry [J]. Environmental Science, 2018, 39 (11): 4841- 4848
8 河北省生态环境厅. 关于征求《水泥工业大气污染物超低排放标准(二次征求意见稿)》等两项地方标准意见的函[EB/OL]. (2019-10-19). http://hbepb.hebei.gov.cn/hjzw/kjbz/dfhbbz/yjzj/201910/t20191009_83669.html.
9 SCUR D P, OSTZEMENT C, HOPPE R D H, et al The present state of NOx abatement with the SNCR process [J]. Cement International, 2006, 2: 62- 74
10 SCUR P, HüBNER O NOx emissions and the abatement potential of SNCR technology in a kiln plant with calciner [J]. Cement International, 2013, 11 (2): 54- 63
11 STEUCH H E, HILLE J, SUM W H, et al Reduction of NOx emissions from a dry precess preheater kiln through the use of the NOxout process [J]. ZKG International, 1996, 49 (1): 1- 11
12 STEUCH H E, HILLE J, SUM W H, et al Reduction of NOx emissions from a dry process preheater kiln with calciner through the use of the urea based SNCR process [J]. IEEE Transactions on Industry Applications, 1996, 32 (4): 753- 759
doi: 10.1109/28.511629
13 USEPA. NOx control technologies for the cement industry [EB/OL]. [2020-02-28]. https://www3.epa.gov/airquality/ctg_act/200009_nox_epa457_r-00-002_cement_industry.pdf.
14 周荣, 金瑞奔, 汪昊奇, 等 水泥炉窑SNCR烟气脱硝技术的工程应用分析[J]. 水泥, 2013, (1): 13- 15
ZHOU Rong, JIN Rui-ben, WANG Hao-qi, et al Engineering application analysis of SNCR flue gas denitrification technology in cement kiln[J]. Cement, 2013, (1): 13- 15
15 张家荣 干法水泥熟料生产线SNCR脱硝技术[J]. 科技创新与应用, 2018, 22: 142- 143
ZHANG Jia-rong SNCR denitrification technology for dry process cement clinker production line[J]. Technology Innovation and Application, 2018, 22: 142- 143
doi: 10.3969/j.issn.2095-2945.2018.31.064
16 USEPA. Alternative control techniques document - NOx emissions from cement manufacturing [EB/OL]. [2020-02-28]. https://www3.epa.gov/ttncatc1/dir1/cement.pdf.
17 水泥工业大气污染物排放标准: GB4915–2013 [S]. 北京: 中华人民共和国国家质量监督检验检疫总局, 2013.
18 程鹏飞. LNB+SCR联合脱硝技术在某燃煤锅炉脱硝改造中的应用研究[D]. 兰州: 兰州大学, 2015.
CHENG Peng-fei. Study and application of denitration technique combined LNB and SCR in coal-fired boiler [D]. Lanzhou: Lanzhou University, 2015.
19 温智勇, 胡敏, 杨玉, 等 联合空气分级与SNCR 300 MW 锅炉上的应用[J]. 浙江大学学报: 工学版, 2014, 48 (1): 63- 69
WEN Zhi-yong, HU Min, YANG Yu, et al Application of air staging combined with SNCR on 300 MW boiler[J]. Journal of Zhejiang University: Engineering Science, 2014, 48 (1): 63- 69
20 HARDISON L C, NAGL G J, ADDISON G E NOx reduction by the Econ-NOx SCR process [J]. Environmental Progress, 1991, 10 (4): 314- 318
doi: 10.1002/ep.670100419
21 张杨, 杨用龙, 冯前伟, 等 燃煤电厂SCR烟气脱硝改造工程关键技术[J]. 中国电力, 2015, 48 (4): 32- 35
ZHANG Yang, YANG Yong-long, FENG Qian-wei, et al Key technical issues of SCR denitrification from coal-fired boiler flue gas[J]. Electric Power, 2015, 48 (4): 32- 35
22 崔海峰, 谢峻林, 李凤祥, 等 SCR烟气脱硝技术的研究与应用[J]. 硅酸盐通报, 2016, 35 (3): 805- 809
CUI Hai-feng, XIE Jun-lin, LI Feng-xiang, et al Research and application of SCR flue gas denitrification technology[J]. Bulletin of the Chinese Ceramic Society, 2016, 35 (3): 805- 809
23 何陆灿, 葛铭, 陈国庆, 等 火电厂SCR 脱硝系统喷氨优化调整[J]. 热力发电, 2019, 48 (11): 129- 134
HE Lu-can, GE Ming, CHEN Guo-qing, et al Optimization of ammonia-injection in SCR denitrification system of coal-fired power plants[J]. Thermal Power Generation, 2019, 48 (11): 129- 134
24 李媛, 吕龙, 张小龙, 等 水泥窑炉SCR烟气脱硝工艺设计[J]. 中国环保产业, 2019, (11): 37- 40
LI Yuan, LV Long, ZHANG Xiao-long, et al Design of SCR flue gas denitration process in cement kiln[J]. China Environmental Protection Industry, 2019, (11): 37- 40
doi: 10.3969/j.issn.1006-5377.2019.11.011
25 曹俊, 傅敏, 周林, 等 SCR脱硝催化剂中毒的研究进展[J]. 应用化工, 2018, 47 (2): 380- 385
CAO Jun, FU Min, ZHOU Lin, et al Research progress of SCR denitrification catalyst poisoning[J]. Applied Chemical Industry, 2018, 47 (2): 380- 385
doi: 10.3969/j.issn.1671-3206.2018.02.042
26 凌庭生 浅析水泥窑炉烟气SCR脱硝技术的现状[J]. 新世纪水泥导报, 2014, (6): 20- 24
LING Ting-sheng Analysis on the status of SCR denitration technology in cement kiln flue gas[J]. Cement Guide for New Epoch, 2014, (6): 20- 24
doi: 10.3969/j.issn.1008-0473.2014.06.004
27 房晶瑞, 马忠诚, 汪澜 水泥窑炉烟气催化还原脱硝技术研究进展[J]. 环境污染与防治, 2013, 35 (2): 85- 92
FANG Jing-rui, MA Zhong-cheng, WANG Lan Research progress on catalytic reduction technique for denitration of cement flue gas[J]. Environmental Pollution and Control, 2013, 35 (2): 85- 92
doi: 10.3969/j.issn.1001-3865.2013.02.018
28 唐飞翔, 廖达琛, 郑俊杰, 等 用于水泥行业的脱硝除尘一体化技术与中试研究[J]. 上海节能, 2019, (9): 778- 781
TANG Fei-xiang, LIAO Da-chen, ZHENG Jun-jie, et al Denitrification and dust removal in-tegration technology and pilot study for cement industry[J]. Shanghai Energy Conservation, 2019, (9): 778- 781
29 李海波, 雷华, 李凌霄 水泥窑烟气SCR脱硝技术应用[J]. 中国水泥, 2019, (2): 84- 86
LI Hai-bo, LEI Hua, LI Ling-xiao Application of SCR denitration technology in cement kiln flue gas[J]. China Cement, 2019, (2): 84- 86
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