2020, Volume 6, Issue 12
Engineering >> 2020, Volume 6, Issue 12 doi: 10.1016/j.eng.2019.10.018
Near-Zero Air Pollutant Emission Technologies and Applications for Clean Coal-Fired Power
China Energy Investment Corporation Limited, Beijing 100011, China
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Abstract
Coal is the dominant energy source in China, and coal-fired power accounts for about half of coal consumption. However, air pollutant emissions from coal-fired power plants cause severe ecological and environmental problems. This paper focuses on near-zero emission technologies and applications for clean coal-fired power. The long-term operation states of near-zero emission units were evaluated, and synergistic and special mercury (Hg) control technologies were researched. The results show that the principle technical route of near-zero emission, which was applied to 101 of China’s coal-fired units, has good adaptability to coal properties. The emission concentrations of particulate matter (PM), SO2, and NOx were below the emission limits of gas-fired power plants and the compliance rates of the hourly average emission concentrations reaching near-zero emission in long-term operation exceeded 99%. With the application of near-zero emission technologies, the generating costs increased by about 0.01 CNY∙(kW∙h)–1. However, the total emissions of air pollutants decreased by about 90%, resulting in effective improvement of the ambient air quality. Furthermore, while the Hg emission concentrations of the near-zero emission units ranged from 0.51 to 2.89 μg∙m–3, after the modified fly ash (MFA) special Hg removal system was applied, Hg emission concentration reached as low as 0.29 μg∙m–3. The operating cost of this system was only 10%–15% of the cost of mainstream Hg removal technology using activated carbon injection. Based on experimental studies carried out in a 50 000 m3∙h–1 coal-fired flue gas pollutant control pilot platform, the interaction relationships of multi-pollutant removal were obtained and solutions were developed for emissions reaching different limits. A combined demonstration application for clean coal-fired power, with the new "1123” eco-friendly emission limits of 1, 10, 20 mg∙m–3, and 3 μg∙m–3, respectively, for PM, SO2, NOx, and Hg from near-zero emission coal-fired power were put forward and realized, providing engineering and technical support for the national enhanced pollution emission standards.
Keywords
Clean coal-fired power ; Air pollutants ; Near-zero emission ; Pilot platform ; New ‘‘1123” eco-friendly emission limits
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References
[ 1 ] Cen KF, Ni MJ, Gao X, Luo ZY, Wang ZH, Zheng CH. Progress and prospects on clean coal technology for power generation. Chin J Eng Sci 2015;17(9):49–55. Chinese. link1
[ 2 ] National Bureau of Statistics. [China energy statistical yearbook 2018]. Beijing: China Statistics Press; 2019. Chinese.
[ 3 ] [Basic statistics of China electric power 2018] [Internet]. Beijing: China Electricity Council; 2019 Jan 19 [cited 2019 Jun 18]. Available from: http:// www.stats.gov.cn/tjsj/ndsj/2018/indexch.htm. Chinese. link1
[ 4 ] National Standard of the People’s Republic of China. GB 13223–2011: Emission standard of air pollutants for thermal power plants. Chinese standard. Beijing: Ministry of Environmental Protection of the PRC; 2011. Chinese.
[ 5 ] Wang SM, Song C, Chen YB. Technology research and engineering applications of near-zero air pollutant emission coal-fired power plants. Res Envion Sci 2015;28(4):487–94. Chinese.
[ 6 ] [Notice on the issuance of the action plan for upgrading and retrofitting of coal-fired power plants for energy conservation and emission reduction (2014–2020)] [Internet]. Beijing: National Development and Reform Commission; 2014 Sep 12 [cited 2019 Jun 18]. Available from: http:// www.gov.cn/gongbao/content/2015/content_2818468.htm. Chinese. link1
[ 7 ] Wang G, Ma Z, Deng J, Li Z, Duan L, Zhang Q, et al. Characteristics of particulate matter from four coal-fired power plants with low-low temperature electrostatic precipitator in China. Sci Total Environ 2019;662:455–61. link1
[ 8 ] An LS, Wang JP, Li JG, Yang HF, Liu WP, Liu HX, et al. Development and application overview of electrostatic precipitation technology for coal-fired power plant in China. Electr Power 2018;51(4):115–23. Chinese
[ 9 ] Wang SM, Zhang Y, Liu JZ. Integrated application of fine particulate matter control technologies and their ‘‘near-zero emission” characteristics in coalfired power plants. Res Envion Sci 2016;29(9):1256–63. Chinese
[10] Zhong XP, Li FQ, Wu QR. Development status of high temperature dust removal technology in electric power industry. Energy Environ 2018;150 (5):65–8. Chinese
[11] Zhang SJ, Zheng HA, Chen JS, Fan YJ, Li XQ. Status analysis and improvement measures of volatile dust removal technology in coal pyrolysis process. Clean Coal Technol 2014;20(3):79–82. Chinese.
[12] Fang MX, Liu JJ, Cen JM, Chen QL, Xia ZX. Research progress and application prospect of high temperature electrostatic precipitation technology. High Volt Eng 2019;45(4):1108–17. Chinese.
[13] Wang SM. Research on coal-fired power plants near-zero emission technologies and applications. [dissertation]. Beijing: North China Electric Power University; 2017. Chinese.
[14] Shi WZ, Yang MM, Zhang XH, Li SQ, Yao Q. Ultra-low emission technical route of coal-fired power plants and the cooperative removal. P CSEE 2016;36 (16):4308–18. Chinese.
[15] El Sheikh K, Khan MJH, Hamid MD, Shrestha S, Ali BS, Ryabov GA, et al. Advances in reduction of NOx and N2O emission formation in an oxy-fired fluidized bed boiler. Chin J Chem Eng 2019;27(2):426–43. link1
[16] Ke XW, Cai RX, Yang HR, Zhang M, Zhang H, Wu YX, et al. Formation and ultralow emission of NOx for circulating fluidized bed combustion. P CSEE 2018;38 (2):390–6. Chinese.
[17] Hao JM, Ma GD, Wang SX. Air pollution control engineering. 3rd ed. Beijing: Higer Education Press; 2010. Chinese.
[18] Chang SY, Zhuo JK, Meng S, Qin SY, Yao Q. Clean coal technologies in China: current status and future perspectives. Engineering 2016;2 (4):447–59. link1
[19] Cen KF. Research progress and outlook for efficient, clean and low-carbon coal utilization. Sci Technol Rev 2018;36(10):66–74. Chinese.
[20] Ozaki M, Uddin MA, Sasaoka E, Wu S. Temperature programmed decomposition desorption of the mercury species over spent iron-based sorbents for mercury removal from coal derived fuel gas. Fuel 2008;87(17– 18):3610–5. link1
[21] Srivastava RK, Hutson N, Martin B, Princiotta F, Staudt J. Control of mercury emissions from coal-fired electric utility boilers. Environ Sci Technol 2006;40 (5):1385–93. link1
[22] Zhao SL, Duan YF, Yao T, Liu M, Lu JH, Tan HZ, et al. Study on the mercury emission and transformation in an ultra-low emission coal-fired power plant. Fuel 2017;199:653–61. link1
[23] Fan XP, Li CT, Zeng GM, Zhang X, Tao SS, Lu P, et al. Hg0 removal from simulated flue gas over CeO2/HZSM-5. Energy Fuels 2012;26(4):2082–9. link1
[24] Li H, Wu CY, Li Y, Zhang J. CeO2–TiO2 catalysts for catalytic oxidation of elemental mercury in low-rank coal combustion flue gas. Environ Sci Technol 2011;45(17):7394–400. link1
[25] Diamantopoulou I, Skodras G, Sakellaropoulos GP. Sorption of mercury by activated carbon in the presence of flue gas components. Fuel Process Technol 2010;91(2):158–63. link1
[26] Khunphonoi R, Khamdahsag P, Chiarakorn S, Grisdanurak N, Paerungruang A, Predapitakkun S. Enhancement of elemental mercury adsorption by silver supported material. J Environ Sci 2015;32(6):207–16. link1
[27] Wang SM, Zhang YS, Gu YZ, Wang JW, Liu Z, Zhang Y, et al. Using modified fly ash for mercury emissions control for coal-fired power plant applications in China. Fuel 2016;181(1):1230–7. link1
[28] Gu YZ, Zhang YS, Lin LR, Xu H, Orndorff W, Pan WP. Evaluation of elemental mercury adsorption by fly ash modified with ammonium bromide. J Therm Anal Calorim 2015;119(3):1663–72. link1
[29] Wang P, Wu J, He P, Chen JH, Liu QY, Feng C, et al. Experimental study on the characteristics of modified Ca-based sorbents and its mercury adsorption capability in the flue gas. Adv Mat Res 2012;424–425:971–6. link1
[30] Yang S, Yan N, Guo Y, Wu D, He H, Qu Z, et al. Gaseous elemental mercury capture from flue gas using magnetic nanosized (Fe3xMnx)1dO4. Environ Sci Technol 2011;45(4):1540–6. link1
[31] Du W, Yin LB, Zhuo YQ, Xu QS, Zhang L, Chen CH. Experimental study on mercury capture using non-carbon sorbents in 100 MW coal-fired power plant. CIESC J 2014;65(11):4413–19. Chinese
[32] Glesmann S, Mimna R. The state of U.S. mercury control in response to MATS [Internet]. Power; 2015 Apr 1 [cited 2019 Jun 18]. Available from: http://www. powermag.com/the-state-of-u-s-mercury-control-in-response-to-mats/. link1
[33] Jones AP, Hoffmann JW, Smith DN, Feeley TJ 3rd, Murphy JT. DOE/NETL’s phase II mercury control technology field testing program: preliminary economic analysis of activated carbon injection. Environ Sci Technol 2007;41 (4):1365–71. link1
[34] DB 13/2081–2014: Industrial fuel coal and civil fuel coal. Local standard of Hebei Province. Shijiazhuang: Quality and Technology Supervision Bureau of Hebei Province; 2014. Chinese.
[35] [Notice on the issuance of air pollution prevention and control implementation plan in Zhejiang Province 2017] [Internet]. Hangzhou: Department of Ecology and Environment of Zhejiang Province; 2017 May 19 [cited 2019 Jun 18]. Available from: http://www.zj.gov.cn/art/2017/5/22/art_ 12895_292947.html. Chinese. link1
[36] [Notice on the issuance of air pollution prevention and control action plan in Guangdong Province (2014–2017)] [Internet]. Guangdong: Department of Ecology and Environment of Guangzhou Province; 2014 Feb 7 [cited 2019 Jun 18]. Available from: http://www.gd.gov.cn/gkmlpt/content/0/142/post_ 142687.html#7. Chinese. link1
[37] Wang SX, Zhang L, Wu QR, Wang FY. Emission characteristics and environmental impacts of atmospheric mercury in China and control approaches. Beijing: Science Press; 2016. Chinese.
[38] Dai SF, Ren DY, Chou CL, Finkelman RB, Seredin VV, Zhou YP. Geochemistry of trace elements in Chinese coals: a review of abundances, genetic types, impacts on human health, and industrial utilization. Int J Coal Geol 2012;94 (3):3–21. link1
[39] Zhao YC, Yang JP, Ma SM, Zhang SB, Liu H, Gong BG, et al. Emission controls of mercury and other trace elements during coal combustion in China a review. Int Geol Rev 2018;60(5–6):638–70. link1
[40] Zhang L, Wang SX, Hui LL, Hao JM. Strategic recommendations for the coal combustion sector in China on the implementation of minamata convention on mercury. Environ Prot 2016;44(22):38–42. Chinese.
[41] Yin LB, Zhuo YQ, Xu QS, Zhu ZW, Du W, An ZY. Mercury emission from coalfired power plants in China. P CSEE. 2013;33(29):1–10. Chinese.
[42] Wang SX, Zhang L, Li GH, Wu Y, Hao JM, Pirrone N, et al. Mercury emission and speciation of coal-fired power plants in China. Atmos Chem Phys 2010;10 (3):1183–92. link1
[43] The first near-zero emission coal-fired power in the Jing–Jin–Ji region. Economic Information Daily. 2015 Nov 30; 6. Chinese.
[44] Wang SM, Liu JZ. Investigation of near-zero air pollutant emission characteristics from coal-fired power plants. P CSEE 2016;36(22):6140–7. link1
[45] Zhang Y, Bo X, Zhao Y, Nielsen CP. Benefits of current and future policies on emissions of China’s coal-fired power sector indicated by continuous emission monitoring. Environ Pollut 2019;251:415–24. link1
[46] UNEP. Global mercury assessment, sources, emissions, releases, and environmental transport. Geneva: UNEP Chemicals Branch; 2013. link1
[47] Zhang Y, Yang JP, Yu XH, Sun P, Zhao YC, Zhang JY, et al. Migration and emission characteristics of Hg in coal-fired power plant of China with ultra low emission air pollution control devices. Fuel Process Technol 2017;158:272–80. link1
[48] Pudasainee D, Kim JH, Yoon YS, Seo YC. Oxidation, reemission and mass distribution of mercury in bituminous coal-fired power plants with SCR, CSESP and wet FGD. Fuel 2012;93(1):312–8. link1
[49] Zhang Y, Mei D, Wang T, Wang J, Gu Y, Zhang Z, et al. In-situ capture of mercury in coal-fired power plants using high surface energy fly ash. Environ Sci Technol 2019;53(13):7913–20. link1
[50] Williams J. America’s best coal plants [Internet]. Power Engineering; 2014 Jul 17 [cited 2019 Jun 18]. Available from: http://www.power-eng.com/articles/ print/volume-118/issue-7/features/america-s-best-coal-plants.html. link1
[51] Tian HZ, Lu L, Hao JM, Gao JJ, Cheng K, Liu KY, et al. A review of key hazardous trace elements in Chinese coals: abundance, occurrence, behavior during coal combustion and their environmental impacts. Energy Fuels 2013;27 (2):601–14. link1
[52] Wang SM, Yu XH, Gu YZ, Yuan J, Zhang Y, Chen YB, et al. Discussion of emission limits of air pollutants for near-zero emission coal-fired power plants. Res Environ Sci 2018;31(6):975–84. Chinese.
[53] Wang SM, Liu JZ. Economic and environmental comparison of clean coal-fired power and gas turbine power. China Coal 2016;42(12):5–13. link1
[54] [Environmental protection tax law of the PRC] [Internet]. Beijing: The National People’s Congress of the PRC; 2016 Dec 25 [cited 2019 Jun 18]. Available from: http://www.npc.gov.cn/npc/c12435/201612/c305c6c912054177bbc3143628 983e87.shtml. Chinese. link1
[55] Liu X, Liu ZL, Jiao WD, Li X, Lin JT, Ku A. Impact of ‘‘ultra low emission” technology of coal-fired power on PM 2.5 pollution in the Jing–Jin–Ji region. Front Energy 2017:1–5. link1
[56] Xu HH, Mo H, Wu JY, Zhu J, Huang R. Environmental benefits analysis under thermal power plant in Jing–Jin–Ji region in China under different pollution control scenarios. Environ Eng 2017;35(10):166–70. Chinese.
[57] [Notice on the issuance of air pollution prevention and control action plan] [Internet]. Beijing: The Central People’s Government of the PRC; 2013 Sep 10 [cited 2019 Jun 18]. Available from: http://www.gov.cn/zwgk/2013-09/ 12/content_2486773.htm. Chinese. link1
[58] [Report on the state of the ecology and environment in China 2018]. Beijing: Ministry of Ecology and Environment of the PRC; 2019 May 29. Chinese.
[59] World Health Organization. WHO air quality guidelines for particulate matter, ozone, nitrogen dioxide and sulfur dioxide—global update 2005. Geneva: WHO Press; 2006.
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