脱除烟气SO3实现SCR宽负荷脱硝的可行性分析

doi:10.11930/j.issn.1004-9649.201806086

摘要/Abstract

摘要： 为适应火电机组灵活性改造要求，机组需在超低负荷下安全稳定运行，其中低负荷脱硝改造是重要组成部分。分析了以往燃煤机组SCR脱硝系统低负荷下退出的原因，介绍了宽负荷脱硝改造方案，其主要包括：提高SCR入口烟温技术，使用宽温度范围催化剂和采用碱性吸附剂脱除烟气中SO₃技术。从初投资、改造工期、改造效果、其他收益等方面全面比较了各方案优缺点，提出“因厂制宜，因机制宜”的改造思路。同时指出，由于碱性吸附剂脱除SO₃技术具有消除蓝色烟羽、预防空气预热器堵塞、防治设备腐蚀、减少脱硫废水产生量和重金属协同脱除等其他技术不具备的额外收益，未来应加快发展。

关键词: 燃煤电厂, 有色烟羽, 超低排放, 灵活性改造, SCR, 宽负荷脱硝, 硫酸氢铵, 三氧化硫（SO₃）

Abstract: In order to meet the requirement of the flexibility reconstruction projects in coal fired power plants, it is necessary to ensure the safe and stable operation of the units at low load. The low load SCR denitration is an important part of the flexibility reconstruction project. This paper analyzes why SCR reactor exits when the coal-fired boiler operates at low load, reviews the development of the SCR technology under full load, and introduces some typical retrofitting schemes to improve the adaptability of SCR at low load. These retrofitting schemes are compared with the original design from the aspects of initial investment, retrofitting schedule, effectiveness and other benefits. The specific situation of the plants or units should be considered as well. In addition, the alkaline sorbent injection technology is more practical in engineering, as it has some other benefits such as curing plume visibility, preventing the APH plugging, resolving equipment corrosion, reducing the desulfurization waste water and synergistic removal of heavy metals.

Key words: coal-fired power plant, plume opacity, ultra-low emissions, flexible transformation, SCR, full load SCR denitration, NH₄HSO₄, SO₃

中图分类号:

胡冬. 脱除烟气SO₃实现SCR宽负荷脱硝的可行性分析[J]. 中国电力, 2019, 52(3): 49-55.

HU Dong. Feasibility Analysis on the Application of SO₃ Removal Technology in Coal-fired Power Units at Low Load SCR Operation[J]. Electric Power, 2019, 52(3): 49-55.

导出引用管理器 EndNote|Ris|BibTeX

链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201806086

https://www.electricpower.com.cn/CN/Y2019/V52/I3/49

参考文献 47

[1]	龚胜, 石奇光, 冒玉晨, 等. 我国火电机组灵活性现状与技术发展[J]. 应用能源技术, 2017, 5(5):1-6 GONG Sheng, SHI Qiguang, MAO Yuchen, et al. Present situation and development of flexible technology of thermal power units in China[J]. Applied Energy Technology, 2017, 5(5):1-6
[2]	苗强. 脱硝技术的现状及展望[J]. 洁净煤技术, 2017, 23(2):12-19 MIAO Qiang. Progress and prospects of denitration technology[J]. Clean Coal Technology, 2017, 23(2):12-19
[3]	LOCKERT C A, HOEFLICH P C, SMITH L S. Dynamic control of SCR minimum operating temperature[C]//The 9th Convening of COAL-GEN. Charlotte, 2009.
[4]	HIMES R. Summary of selective catalytic reduction system operational issues at low load[R]. Palo Alto, California:Electric Power Research Institute, 2010.
[5]	赵宗让. 电厂锅炉SCR烟气脱硝系统设计优化[J]. 中国电力, 2005, 38(11):69-74 ZHAO Zongrang. Design optimization of SCR system for coal-fired boilers[J]. Electric Power, 2005, 38(11):69-74
[6]	马双忱, 郭蒙, 宋卉卉, 等. 选择性催化还原工艺中硫酸氢铵形成机理及影响因素[J]. 热力发电, 2010, 43(2):75-78, 86 MA Shuangchen, GUO Meng, SONG Huihui, et al. Formation mechanism and influencing factors of ammonium bisulfate during the selective catalytic reduction process[J]. Thermal Power Generation, 2010, 43(2):75-78, 86
[7]	马双忱, 金鑫, 孙云雪, 等. SCR烟气脱硝过程硫酸氢铵的生成机理与控制[J]. 热力发电, 2010, 39(8):12-17 MA Shuangchen, JIN Xin, SUN Yunxue, et al. The formation mechanism of ammonium bisulfate in SCR flue gas denitrification process and control[J]. Thermal Power Generation, 2010, 39(8):12-17
[8]	MOSER R E. Benefits of effective SO3 removal in coal-fired power plants:Beyond opacity control[C]//Power Plant Air Pollutant Control Mega Symposium 2006. Baltimore, 2006:1-14.
[9]	宋玉宝, 刘鑫辉, 何川, 等. SCR催化剂低负荷运行硫酸氢铵失活研究[J]. 中国电力, 2019, 52(1):144-150. SONG Yubao, LIU Xinhui, HE Chuan, et al. Study on the ammonium bisulfate deactivated SCR catalyst at low load operation[J]. Electric Power, 2019, 52(1):144-150.
[10]	MUZIO L, BOGSETH S, HIMES R, et al. Ammonium bisulfate formation and reduced load SCR operation[J]. Fuel, 2017, 206:180-189.
[11]	MENASHA J, DUNN-RANKIN Dn, MUZIO L, et al. Ammonium bisulfate formation temperature in a bench-scale single-channel air preheater[J]. Fuel, 2011, 90(7):2445-2453.
[12]	BURKE J M, JOHNSON K L. Ammonium sulfate and bisulfate formation in air preheaters[R]. Austin:Radian Corporation, 1982.
[13]	WEI J Y, MUZIO L J. Formation temperature of ammonium bisulfate at simulated air preheater conditions[C]//5th US combustion meeting. San Diego, 2007.
[14]	SALEEM A, GALGANO M, INABA S. Hitachi-zosen DeNOx process for fossil fuel-fired boilers[C]//Proceedings of the Second NOx Control Technology Seminar. Denver, 1979.
[15]	MATSUDA S, KAMO T, KATO A, et al. Deposition of ammonium bisulfate in the selective catalytic reduction of nitrogen oxides with ammonia[J]. Industrial & Engineering Chemistry Product Research and Development, 1982, 21(1):48-52.
[16]	杨青山, 廖永进. 降低SCR脱硝装置最低投运负荷的策略研究[J]. 中国电力, 2014, 47(9):153-155 YANG Qingshan, LIAO Yongjin. The strategy on reduction of SCR minimum operation load[J]. Electric Power, 2014, 47(9):153-155
[17]	章义发, 陆明智, 彭万生, 等. 哈尔滨600MW超临界锅炉低负荷期间脱硝运行研究[J]. 中国电业(技术版), 2014(4):36-38 ZHANG Yifa, LU Mingzhi, PENG Wansheng, et al. Research on harbin 600MW supercritical boiler denitrificating operation in low-load[J]. China Electric Power(Technology Edition), 2014(4):36-38
[18]	俞立. 燃煤电厂锅炉宽负荷脱硝技改方案研究及应用[J]. 环境工程, 2017, 35(S):332-336 YU Li. Research and application of the technical scheme of wide load denitration in coal-fired power plant[J]. Environmental Engineering, 2017, 35(S):332-336
[19]	徐昶, 徐良, 胡杰, 等. 国内首台火电机组省煤器分级改造提高SCR入口烟温实践[J]. 锅炉制造, 2014(6):42-23 XU Chang, XU Liang, HU Jie, et al. Practice of economizer classification and reconstruction in the first domestic thermal power plant to enhance SCR inlet gas temperature[J]. Boiler Manufacturing, 2014(6):42-23
[20]	林紫荣. 600 MV超临界机组全负荷脱硝技术改造方案分析[J]. 科技与创新, 2018(4):124-125 LIN Zirong. Analysis on technical scheme of full load denitration in 600 MW supercritical coal-burning power unit[J]. Science and Technology & Innovation, 2018(4):124-125
[21]	章斐然, 周克毅, 徐奇, 等. 燃煤机组低负荷运行SCR烟气脱硝系统应对措施[J]. 热力发电, 2016, 45(7):78-83 ZHANG Feiran, ZHOU Keyi, XU Qi, et al. Countermeasures for SCR denitration system of coal-fired unit during low-load operation[J]. Thermal Power Generation, 2016, 45(7):78-83
[22]	郭贵有. 全负荷脱硝在火力发电厂的可行性探讨[J]. 科技展望, 2017, 27(16):91 GUO Guiyou. Feasibility discussion on full load denitration in coal-fired power plant[J]. Technology Outlook, 2017, 27(16):91
[23]	齐玄, 齐继玄. 浅议燃煤机组低负荷脱硝改造方案[J]. 能源与节能, 2016(1):118-119 QI Xuan, QI Jixuan. Analysis of the denitration modification scheme of coal-fired unit under low load[J]. Energy and Conservation, 2016(1):118-119
[24]	余岳溪, 廖永进, 范军辉, 等. 增设零号高压加热器控制SCR脱硝烟温对机组经济性影响的计算研究[J]. 广东电力, 2016, 29(9):7-12, 32 YU Yuexi, LIAO Yongjin, FAN Junhui, et al. Calculation analysis on influence on economy of the unit by additional No. 0 high pressure heater controlling SCR denitration flue gas temperature[J]. Guangdong Electric Power, 2016, 29(9):7-12, 32
[25]	李千军, 刘光耀, 韩伟, 等. 采用喷射式热泵提高火电机组给水温度的理论研究[J]. 西安交通大学学报, 2013, 47(11):25-28, 47 LI Qianjun, LIU Guangyao, HAN Wei, et al. Heating feedwater of thermal power units using jet heat pump[J]. Journal of XI'AN Jiaotong University, 2013, 47(11):25-28, 47
[26]	李冰心, 张国柱, 陈伟雄, 等. 采用蒸汽喷射器的低负荷给水加热系统变工况性能研究[J]. 西安交通大学学报, 2017, 51(1):65-71 LI Bingxin, ZHANG Guozhu, CHEN Weixiong, et al. Analysis on the performance of low-load feed water heating system with jet heat pump under variable working conditions[J]. Journal of XI'AN Jiaotong University, 2017, 51(1):65-71
[27]	张国柱, 李冰心, 李亚维, 等. 采用给水加热实现660MW超临界机组宽负荷脱硝的理论研究[J]. 动力工程学报, 2018, 38(1):50-54 ZHANG Guozhu, LI Bingxin, LI Yawei, et al. Theoretical study on wide load denitration of a 660 MW supercritical unit by retrofitting the feedwater heating system[J]. Journal of Chinese Society of Power Engineering, 2018, 38(1):50-54
[28]	PARENT R, RIVERA B. SCR reheat burners keep NOx in spec at low loads[J]. Power, 2015, 159(3):38-40.
[29]	曲瑞阳. 新型宽温度窗口催化剂选择性催化还原NOx的机理研究[D]. 杭州:浙江大学, 2017.
[30]	郭凤, 余剑, 牟洋, 等. 宽工作温度烟气脱硝催化剂制备及反应机理研究[J]. 燃料化学学报, 2014, 42(1):101-109 GUO Feng, YU Jian, MOU Yang, et al. Preparation of catalyst with wide working-temperature and the reaction mechanism of flue gas denitration[J]. Journal of Fuel Chemistry and Technology, 2014, 42(1):101-109
[31]	ZHOU Chaoyang, ZHANG Linan, DENG Yue, et al. Research progress on ammonium bisulfate formation and control in the progress of selective catalytic reduction[J]. Environmental Progress & Sustainable Energy, 2016, 35(6):1664-1672.
[32]	GRAY S, JARVIS J. SCR performance enhancement for NOx emission reductions SO3 removal is an important aspect of a successful emission reduction strategy[R]. Livonia:Worldwide Pollution Control Association, 2017:1-4.
[33]	胡冬, 王海刚, 郭婷婷, 等. 燃煤电厂烟气SO3控制技术的研究及进展[J]. 科学技术与工程, 2015, 15(35):92-99 HU Dong, WANG Haigang, GUO Tingting, et al. Research and development of mitigating technology of SO3 in flue gas from coal power plants[J]. Science Technology and Engineering, 2015, 15(35):92-99
[34]	姚宣, 杨建辉, 王洪亮, 等. 碱性吸收剂喷射脱除电厂烟气SO3技术及理论模型[J]. 中国电力, 2018, 51(4):130-135 YAO Xuan, YANG Jianhui, WANG Hongliang, et al. Theoretical model for SO3 removal from flue gas using alkali sorbent injection technology in power plant[J]. Electric Power, 2018, 51(4):130-135
[35]	高智溥, 胡冬, 张志刚, 等. 碱性吸附剂SO3脱除技术在大型燃煤机组中的应用分析[J]. 中国电力, 2017, 50(7):102-108 GAO Zhipu, HU Dong, ZHANG Zhigang, et al. Application of SO3 removal with alkaline sorbent injection in large capacity coal-fired power plants[J]. Electric Power, 2017, 50(7):102-108
[36]	LOCKERT C A, CHOTHANI C, FILIPPELLI G et al. Advances in hot side SO3 mitigation technology[C]//The 8th Power Plant Air Pollutant Control Mega Symposium. Baltimore, 2010:2553-2562.
[37]	NORMAN J E, THOMAS M A. Dry sorbent injection at the SCR inlet for SO3 mitigation[C]//The 8th Power Plant Air Pollutant Control Mega Symposium. Baltimore, 2010:1289-1317.
[38]	GHOREISHI, FARROKH, HEALY, et al. Cheat strategies for violating minimum operating temperature[R]. Palo Alto, California:Electric Power Research Institute, 2010.
[39]	BERTOLE C J. Method for enhanced low load SCR operation[C]//Power Plant Pollutant Control and Carbon Management "MEGA" Symposium. Baltimore, 2016.
[40]	王梦勤, 李楠, 郭长仕. 全负荷SCR脱硝烟温调节技术探讨[J]. 环境工程, 2017, 35(S1):67-70 WANG Mengqin, LI Nan, GUO Changshi. Investigation of regulation technology for SCR denitration under the full operation condition[J]. Environmental Engineering, 2017, 35(S1):67-70
[41]	李德波, 曾庭华, 廖永进, 等. 600 MW电站锅炉SCR脱硝系统全负荷投运改造方案研究与工程实践[J]. 广东电力, 2016, 29(6):12-17 LI Debo, ZENG Tinghua, LIAO Yongjin, et al. Research on transformation scheme for full-load operation of SCR denitration system of 600 MW substation boiler and engineering practice[J]. Guangdong Electric Power, 2016, 29(6):12-17
[42]	车聪斌, 张乐乐, 孟胜利. 零号高压加热器热经济性分析[J]. 山东工业技术, 2016(3):61-62 CHE Congbin, ZHANG Lele, MENG Shengli. Thermo-economic performance analysis on the No. 0 high pressure heater[J]. Shandong Industrial Technology, 2016(3):61-62
[43]	刘启军, 李作兰, 方琪. 超超临界机组增设零号高压加热器研究[J]. 吉林电力, 2015, 43(4):1-4 LIU Qijun, LI Zuolan, FANG Qi. Research on adding No. 0 high-pressure heater to ultra supercritical unit[J]. Jilin Electric Power, 2015, 43(4):1-4
[44]	晏敏, 张杨, 朱跃, 等. 超低排放形势下SCR脱硝工程改造现状的调查[J]. 中国电力, 2018, 51(11):163-167 YAN Min, ZHANG Yang, ZHU Yue, et al. Investigation on the status of the reconstructive projects for SCR De-NOx under the condition of ultra-low emission[J]. Electric Power, 2018, 51(11):163-167
[45]	BENAJES J, PASTOR J V, GARCÍA A, et al. The potential of RCCI concept to meet EURO VI NOx limitation and ultra-low soot emissions in a heavy-duty engine over the whole engine map[J]. Fuel, 2015, 159:952-961.
[46]	CANOVA M, MIDLAM-MOHLER S, PISU P, et al. Model-based fault detection and isolation for a diesel lean NOx trap aftertreatment system[J]. Control engineering practice, 2010, 18(11):1307-1317.
[47]	李帅英, 武宝会, 姚皓, 等. SCR催化剂活性评估对NOx超低排放影响[J]. 中国电力, 2017, 50(8):163-167 LI Shuaiying, WU Baohui, YAO Hao, et al. Effect of SCR catalyst activity evaluation on ultra-low emission of NOx[J]. Electric Power, 2017, 50(8):163-167

脱除烟气SO₃实现SCR宽负荷脱硝的可行性分析

Feasibility Analysis on the Application of SO₃ Removal Technology in Coal-fired Power Units at Low Load SCR Operation

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献 47

相关文章 15

编辑推荐

Metrics

[1]	刘志强, 李建锋, 潘荔, 王志轩. 中国煤电机组改造升级效果分析与展望[J]. 中国电力, 2024, 57(7): 1-11.
[2]	曲立涛, 齐晓辉, 王德鑫, 于洪海. 基于CEMS数据的超低排放燃煤机组大气污染物排放特性分析[J]. 中国电力, 2023, 56(2): 171-178.
[3]	刘毅. 燃煤电厂烟气中SO₃排放控制中试研究[J]. 中国电力, 2022, 55(7): 201-208.
[4]	刘含笑, 吴黎明, 赵琳, 于立元, 郦建国, 崔盈. 燃煤电厂湿式电除尘器减排及能效特性研究[J]. 中国电力, 2022, 55(5): 196-203.
[5]	张志勇, 莫华, 王猛, 帅伟. 600 MW燃煤机组烟气污染物控制研究[J]. 中国电力, 2022, 55(5): 204-210.
[6]	孙尊强, 郑成航, 周灿, 王圣, 马修元, 叶毅科. 燃煤电厂典型除尘器运行现状分析及优化[J]. 中国电力, 2022, 55(11): 194-201.
[7]	陈晨, 贾舒雅, 刘丁嘉, 贾海威, 张颖, 曲艳超. 平板式抗砷中毒SCR脱硝催化剂在高砷烟气中活性变化研究[J]. 中国电力, 2022, 55(11): 202-208.
[8]	王彦哲, 周胜, 姚子麟, 欧训民. 中国煤电生命周期二氧化碳和大气污染物排放相互影响建模分析[J]. 中国电力, 2021, 54(8): 128-135.
[9]	刘志坦, 姚杰, 庄柯, 喻乐蒙, 周凯. 燃气轮机与燃煤机组SCR脱硝催化剂特性比较[J]. 中国电力, 2021, 54(6): 145-152.
[10]	朱法华, 许月阳, 孙尊强, 孙雪丽, 王圣. 中国燃煤电厂超低排放和节能改造的实践与启示[J]. 中国电力, 2021, 54(4): 1-8.
[11]	晏敏, 张杨, 郭博闻, 朱跃. 基于全寿命周期成本的SCR脱硝系统优化分析[J]. 中国电力, 2021, 54(3): 191-196.
[12]	吴家玉, 莫华, 胡耘, 朱杰, 帅伟, 张晴, 姜岸. 京津冀及周边地区燃煤电厂煤场无组织颗粒物不同控制情景下时空变化特征[J]. 中国电力, 2021, 54(2): 182-189.
[13]	惠立锋. 燃煤电厂超低排放PM₁₀/PM_2.5实验室采样对比分析[J]. 中国电力, 2021, 54(2): 190-196.
[14]	华晨飞, 朱林, 姚杰, 庄柯. 废烟气脱硝催化剂资源回用载体的品质及特性研究[J]. 中国电力, 2021, 54(2): 197-204.
[15]	赵宏, 张发捷, 马云龙, 马宝林, 唐潇, 徐仁博, 罗通达, 李成宝, 任传明, 于洁, 孙路石. 燃煤电厂SCR脱硝氨逃逸迁移规律试验研究[J]. 中国电力, 2021, 54(1): 196-202.

模态框（Modal）标题