全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
化工学报  2015 

燃煤电厂烟气冷却器壁上沉积物分析和形成机理

DOI: 10.11949/j.issn.0438-1157.20141698, PP. 1891-1896

Keywords: 煤燃烧,沉积物,结晶,烟道气,氨逃逸,翅片管换热器

Full-Text   Cite this paper   Add to My Lib

Abstract:

选择性催化还原(SCR)系统和烟气冷却器是实现燃煤电厂节能减排的重要设备,但SCR中的氨逃逸现象对烟气冷却器的影响研究鲜有报道。本文对某电厂SCR设备后的烟气冷却器表面出现的沉积物,进行了XRD、XRF、SEM和EDS等分析研究。结果表明:沉积物的白色结晶物主要为氟硼酸铵,及其反应中间产物(氟化铵、硼酸以及氟硅酸铵),形成该结晶层的主要原因为煤中富集的氟、硼元素和SCR逃逸氨的耦合反应,该沉积物的厚度不会无限增加,但仍会影响烟气冷却器的正常运行。

References

[1]  Tian Yao (田瑶). Study on the waste heat recovery system for utility boiler [D]. Beijing: North China Electric Power University, 2012: 2-3
[2]  Nie Hongguang (聂洪光). Research on the problems and solutions for the increase of energy consumption in China [D]. Jilin: Jilin University, 2013:49-56
[3]  Quoilin S, Orosz M, Hemond H, et al. Performance and design optimization of a low-cost solar organic Rankine cycle for remote power generation [J]. Solar Energy, 2011, 85 (5): 955-966
[4]  Chen Lin (陈林), Sun Yingying (孙颖颖), Liang Jiangtao (梁江涛), Du Xiaoze (杜小泽), Yang Lijun (杨立军). Design and analysis of plastic fin-tube heat exchanger for flue gas heat recover [J]. CIESC Journal (化工学报), 2014, 65 (S1): 175-179
[5]  Juan A M, Malcolm Y. Pedro a nitrous oxide formation in low temperature selective catalytic reduction of nitrogen oxides with V2O5/TiO2 catalysts [J]. Applied Catalysts B: Environmental, 2007, 70 (1-4): 330-334
[6]  Gao Yan (高岩), Luan Tao (栾涛), Peng Jiwei (彭吉伟), Lü Tao (吕涛). DeNOx performance of SCR catalyst for exhaust gas from coal-fired power plant [J]. CIESC Journal (化工学报), 2013, 64 (7): 2611-2618
[7]  Huang Z G, Zhu Z P, Liu Z Y, Liu Q Y. Formation and reaction of ammonium sulfate salts on V2O5/AC catalyst during selective catalytic reduction of nitric oxide by ammonia at low temperatures [J]. J. Catal. , 2003, 214: 213-219
[8]  Burke J M, Johnson K J. Ammonium sulfate and bisulfate formation in air preheaters[R]. EPA-600/S7-82-025a. United States Environmental Protection Agency, 1982
[9]  Lei Z G, Long A B, Wen C P, Zhang J, Chen B H. Experimental and kinetic study of low temperature selective catalytic reduction of NO with NH3 over the V2O5/AC catalys [J]. Industrial & Engineering Chemical Research, 2011, 50 (9): 5360-5368
[10]  Chetan C, Robert M. ABS measurement for SCR NOx control and air heater protection//2008 DOE-EPRI-EPA-A&WMA Power Plant Air Pollutant Control “Mega” Symposium [C]. Baltimore, MD, 2008: 329-331
[11]  U S Department of Energy. Fossil energy research corporation in situ device for real-time catalyst deactivation measurements [R]. Final Technical Report: DOE Project 422FC2G05NT4229898. Laguna Hills, California, 2007
[12]  Li Yingchun (李英春), Li qi (李祺). Preparation and Application of Fluorine Compound (氟化合物制备及应用) [M]. Beijing: Chemical Industry Press, 2006:9-128
[13]  Christe K O, William W W. Nitrogen pentafluoride: covalent NF5 versus ionic NF4+F- and studies on the instability of the latter [J]. Journal of the American Chemical Society, 1992, 114 (25): 9934-9936
[14]  Wu Daishe (吴代赦), Zheng Baoshan (郑宝山), Tang Xiuyi (唐修义), Wang Yan (王燕), Liu Xiaojing (刘晓静), Hu Jun (胡军). Content and distribution of fluorine in Chinese coals [J]. Environmental Science, 2005, 26 (1):7-11
[15]  Huang Wenhui (黄文辉), Yang Yichun (杨宜春). Boron in coal of China [J]. Coal Geology of China (中国煤田地质), 2002, 14 (suppl.):41-42
[16]  Mochizuki Y, Tsubouchi N, Sugawara K. Behavior of boron release and change in the occurrence mode of boron during fixed-bed pyrolysis of coals [J]. Fuel, 2014, 130: 54-59
[17]  Finkelman R B. Modes of occurrence of potentially hazardous elements in coal: levels of confidence [J]. Fuel Processing Technology, 1994, 39: 21-34
[18]  Zheng Xuejia (郑学家). Production and Application of Boron Compounds (硼化合物生产与应用) [M]. Beijing: Chemical Industry Press, 2014:104-124
[19]  Qi Qingjie (齐庆杰), Liu Jianzhong (刘建忠), Cao Xinyu (曹欣玉), Zhou Junhu (周俊虎), Cen Kefa (岑可法). Fluorine distribution characteristics in coal [J]. Journal of Chemical Industry and Engineering (China) (化工学报), 2002, 53 (6): 572-577
[20]  Dalway J S. Trace Elements in Coal [M]. Canada: Butterworths Limited, 1990: 109-113
[21]  Zheng Xuejia (郑学家). Manual of Boron Compounds (硼化合物手册) [M]. Beijing: Chemical Industry Press, 2010:90-101
[22]  Wang Y G, Zhao Q X, Zhang Z X, Zhang Z C, Tao W Q. Mechanism research on coupling effect between dew point corrosion and ash deposition [J]. Applied Thermal Engineering, 2013, 54 (1): 102-110
[23]  Liang Z Y, Zhao Q X, Wang Y G, et al. Coupling mechanism of dew point corrosion and viscous ash deposits [J]. Materials and Corrosion, 2014, 65 (8):797-802
[24]  Li Fei (李飞), Sun Fengzhong (孙奉仲), Shi Yuetao (史月涛). Hot-state experiment on double-pipe heat exchanger under coupled effect of fouling and acid [J]. CIESC Journal (化工学报), 2014, 65 (8): 2876-2881

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133