柴油机选择性催化还原系统氨泄漏及控制研究

doi:10.3969/j.issn.1000-1093.2017.04.002

兵工学报 ›› 2017, Vol. 38 ›› Issue (4): 634-642.doi: 10.3969/j.issn.1000-1093.2017.04.002

柴油机选择性催化还原系统氨泄漏及控制研究

岳广照¹，刘兴华¹，仇滔²

(1.北京理工大学机械与车辆学院，北京 100081; 2.北京工业大学环境与能源工程学院, 北京 100124)

收稿日期:2016-11-07 修回日期:2016-11-07 上线日期:2017-06-06
通讯作者: 刘兴华(1963—), 男, 副教授，博士生导师 E-mail:lxh@bit.edu.cn
作者简介:岳广照(1984—), 男, 博士研究生。E-mail:yue110gz@126.com
基金资助:
北京市教育委员会促进人才培养综合改革基金项目（JZ005011201401）

Research on Ammonia Slip and Control of Diesel Engine SCR System

YUE Guang-zhao¹， LIU Xing-hua¹， QIU Tao²

(1.School of Mechanical Engineering,Beijing Institute of Technology, Beijing 100081，China;2.College of Environment and Energy Engineering, Beijing University of Technology, Beijing 100124,China)

Received:2016-11-07 Revised:2016-11-07 Online:2017-06-06

摘要/Abstract

摘要： 氨泄漏的预测和控制是选择性催化还原系统的关键问题。开展选择性催化还原系统小样试验，研究V₂O₅-WO₃/TiO₂催化剂的氨吸附脱附特性以及氨氮比和温度对氨泄漏量的影响。结果表明：氨泄漏一旦发生氨泄漏量将会迅速升高，氨泄漏临界点的预测和控制对氨泄漏量的控制至关重要；氨泄漏临界点对应的氨存储饱和度不随氨氮比和催化剂温度的变化而改变；氨氮比分别为0.7、1.0和1.4时，氨泄漏临界点对应的氨存储饱和度维持在76.7%附近波动，分别为79%、75%和76%. 氨存储饱和度与氨泄漏临界点有较强的相关性，基于这种相关性设计开发了以氨存储饱和度为控制目标的控制算法，并进行了欧洲瞬态测试循环。采用该控制方法后催化剂出口的氮氧综合比排放为2.45 g/(kW·h)，氨泄漏体积浓度均值为3.7×10^-6，峰值为12.8 ×10^-6，达到国家第Ⅳ阶段机动车污染物排放标准要求。

关键词: 动力机械工程, 柴油机, 选择性催化还原, 氨泄漏, 排放

Abstract: The prediction and control of ammonia slip are the key issues of selective catalytic reduction (SCR) system. A SCR sample test bench was built. The adsorption and desorption characteristics of ammonia in V₂O₅-WO₃/TiO₂ catalyst are studied, and the effects of NH₃/NO_x ratio and catalyst temperature on ammonia slip are analyzed. The results show that the ammonia slip increases rapidly once ammonia leaks. The prediction of critical point of ammonia slip is very crucial for the control of ammonia slip. When the ammonia slip reachs to a critical point, the ammonia storage saturation level is not changed with the change in NH₃/NO_x ratio and catalyst temperature. When NH₃/NO_x ratio is set to 0.7, 1.0 and 1.4, the ammonia storage saturation level is 79%, 75% and 76%. The value of ammonia storage saturation level maintains fluctuations in the rangg of about 76.7% when the ammonia slip reachs to the critical point. The ammonia storage saturation level is related to the ammonia slip critical point. The control method of ammonia slip is designed based on the correlation between ammonia saturation level and ammonia slip critical point. The control method was used for SCR, and the European transient cycle (ETC) test of engine was performed. The ETC test results show that the brake specific emission of outlet NO_x is reduced to 2.45 g/(kW·h), the average ammonia slip is 3.7 ×10^-6, and the peak ammonia slip is 12.8×10^-6, which meet the requirements of national IV emission regulations. Key

Key words: powermachineryengineering, dieselengine, selectivecatalyticreduction, ammoniaslip, emission

中图分类号:

TK421⁺.5

岳广照，刘兴华，仇滔. 柴油机选择性催化还原系统氨泄漏及控制研究[J]. 兵工学报, 2017, 38(4): 634-642.

YUE Guang-zhao， LIU Xing-hua， QIU Tao. Research on Ammonia Slip and Control of Diesel Engine SCR System[J]. Acta Armamentarii, 2017, 38(4): 634-642.

参考文献

［1］ Johnson T V. Review of diesel emissions and control［J］ . SAE International Journal of Fuels and Lubricants, 2010, 3(1):16-29.
［2］ GB17691—2005. 车用压燃式、气体燃料点燃式发动机与汽车排气污染物排放限值及测量方法（中国III、IV、V阶段）［S］.北京：国家环境保护总局，2005.
GB17691—2005. Limits and measurement methods for exhaust pollutants from compression ignition and gas fuelled positive ignition engines of vehicles(III,IV,V)［S］. Beijing: Ministry of Environmental Protection of the People's Republic of China, 2005. (in Chinese)
［3］ Ofoli A R. Experimental demonstration of ammonia storage and slip modeling with control for an SCR aftertreatment system［C］∥2011 IEEE Industry Applications Society Annual Meeting. Orlando, FL, US:IEEE, 2011.
［4］ Nova I, Colombo M, Tronconi E. The NH3 inhibition effect in the standard SCR reaction over a commercial Fe-zeolite catalyst for diesel exhaust aftertreatment: an experimental and modeling study［J］.SAE International Journal of Engines, 2011,4(1): 1822-1838.
［5］ Adelman B, Singh N, Charintranond P, et al. Direct injection into the exhaust stream of gaseous ammonia: design and efficiency of injection and mixing hardware［C］∥SAE 2015 World Congress and Exhibition. Detroit, MI, US：SAE, 2015.
［6］ Castagnola M, Caserta J, Chatterjee S, et al. Engine performance of Cu- and Fe-based SCR emission control systems for heavy duty diesel applications［C］∥SAE 2015 World Congress and Exhibition. Detroit, MI, US：SAE, 2015.
［7］ Ong C, Annaswamy A, Kolmanovsky I V, et al. An adaptive proportional integral control of a urea selective catalytic reduction system based on system identification models［C］∥SAE 2010 World Congress and Exhibition. Detroit, MI, US：SAE, 2010.
［8］ Chatterjee D, Burkhardt T, et al. Numerical simulation of ammonia SCR-catalytic converters: model development and application［C］∥SAE 2005 World Congress and Exhibition. Detroit, MI, US：SAE, 2005.
［9］ Czerwinski J, Zimmerli Y, Mayer A, et al. Diesel emission with DPF+SCR in VERTdePN-testing & potentials［C］∥SAE 2011 World Congress and Exhibition. Detroit, MI, US：SAE, 2011.

［10］胡云峰，蒋冰晶，宫洵，等. 柴油机尿素SCR系统氨覆盖率跟踪控制器设计［J］. 农业机械学报, 2016，47(4)：301-308.
HU Yun-feng, JIANG Bing-jing, GONG Xun, et al. Ammonia coverage rate tracking controller design in diesel engine urea-SCR system［J］. Transactions of the Chinese Society for Agricultural Machinery,2016,47(4):301-308. (in Chinese)
［11］王天田，颜伏伍，刘传宝，等. 柴油机Urea-SCR系统尿素喷射控制策略研究［J］. 内燃机工程,2015,36(4):1-7.
WANG Tian-tian, YAN Fu-wu, LIU Chuan-bao, et al. Study on urea dosing control strategy for Urea-SCR system in diesel engine［J］. Chinese Internal Combustion Engine Engineering, 2015,36(4): 1-7. (in Chinese)
［12］ Feng T，Lu L. The characteristics of ammonia storage and the development of model-based control for diesel engine urea-SCR system［J］. Journal of Industrial and Engineering Chemistry,2015，28(25)：97-109.
［13］蔡忆昔，唐炜，王军，等. 基于NOx传感器NH_3交叉感应的柴油机Urea-SCR的试验［J］.内燃机学报，2015，33(5):461-465.
CAI Yi-xi, TANG Wei, WANG Jun, et al. Experiment on diesel engine Urea-SCR system based on ammonia cross-sensitivity of NOx sensor［J］.Transactions of CSICE,2015，33(5):461-465. (in Chinese)
［14］梁虹. 车用柴油机SCR系统催化箱温度场特性研究［D］.北京：北京理工大学,2015.
LIANG Hong. Research on temperature field properties of selective catalytic reduction in a diesel engine［D］. Beijing: Beijing Institute of Technology, 2015. (in Chinese)
［15］ Iwasaki M, Yamazaki K, Shinjoh H. Transient reaction analysis and steady-state kinetic study of selective catalytic reduction of NO and NO+NO₂ by NH₃ over Fe/ZSM-5［J］. Applied Catalysis A: General, 2009, 366(1):84-92.
［16］ Tronconi E, Nova I, Ciardelli C, et al. Redox features in the catalytic mechanism of the "standard" and "fast" NH3-SCR of NOx over a V-based catalyst investigated by dynamic methods［J］. Journal of Catalysis, 2007, 245(1):1-10.
［17］ Tronconi E, Nova I, Colombo M. Dynamic methods in catalytic reaction engineering: applications to the investigation of the NH3 selective catalytic reactions for diesel emission control［J］. Industrial & Engineering Chemistry Research, 2010,49(21):10374-10385.

第38卷
第4期2017 年4月兵工学报ACTA
ARMAMENTARIIVol.38No.4Apr.2017

[1]	郭圣刚，王建平，赵忠诚，程晶晶，田新伟. 金属掺杂对高强化柴油机活塞销类金刚石薄膜涂层摩擦学性能的影响[J]. 兵工学报, 2021, 42(4): 715-722.
[2]	于飞，刘波澜，颜超，韩耀辉，王文泰. 柴油机电动可变气门正时机构特性[J]. 兵工学报, 2021, 42(3): 468-477.
[3]	顾程，乔新勇，韩立军. 不同燃油对某重型柴油机燃烧稳定性影响分析[J]. 兵工学报, 2020, 41(3): 426-433.
[4]	强永平，李海鹰，张晓琴，蔡忠周，朱伟青，李玉峰，龚永星. 柴油机回水温度对燃烧过程影响试验研究[J]. 兵工学报, 2020, 41(2): 222-230.
[5]	赵建华，应宇辰，郭成豹. 柴油机磁场的计算、试验与消磁优化[J]. 兵工学报, 2020, 41(2): 350-355.
[6]	李佳蔚，崔涛，刘宇航，师帅楠，孙强. 基于排气温度动态模型的在线观测器研究[J]. 兵工学报, 2019, 40(8): 1562-1571.
[7]	王子玉，张岩，王雷，刘金龙，白洪林，李玉峰. 进气门晚关米勒循环对高强化柴油机燃烧和换气影响的研究[J]. 兵工学报, 2019, 40(1): 8-17.
[8]	王旭东，熊春华，鲁长波，安高军，王锋. 高原环境下柴油机燃用聚醚型含氧燃料热平衡试验研究[J]. 兵工学报, 2018, 39(8): 1473-1478.
[9]	刘永丰，王龙飞，刘胜，尹玉婷，杨震寰. 海拔高度对柴油机缸内热流分布影响规律研究[J]. 兵工学报, 2018, 39(6): 1049-1057.
[10]	刘宇航，张付军，高宏力，王苏飞. 对置活塞二冲程柴油机新鲜充量短路研究[J]. 兵工学报, 2018, 39(6): 1058-1065.
[11]	刘宇航，张付军，慕连好，高宏力，王苏飞. 对置活塞二冲程柴油机换气子阶段完成比例研究[J]. 兵工学报, 2018, 39(3): 428-435.
[12]	谭丕强，王德源，王成官，李远，楼狄明，李云广，刘胜，杨振寰. 高原环境下重型柴油机的性能优化研究[J]. 兵工学报, 2018, 39(3): 436-443.
[13]	赵文柱，王宪成，赵永东，孙志新，徐冬冬. 耦合内部流动的喷孔积碳对柴油机喷雾影响研究[J]. 兵工学报, 2018, 39(2): 217-223.
[14]	饶响，盛晨兴，郭智威. 不同表面纹理结构对柴油机缸套-活塞环摩擦磨损性能的影响研究[J]. 兵工学报, 2018, 39(2): 356-363.
[15]	杨绍卿, 翟振东, 王宪成，王雪. 重型车辆柴油机气缸当量漏气面积检测模型研究[J]. 兵工学报, 2018, 39(10): 1883-1891.

柴油机选择性催化还原系统氨泄漏及控制研究

Research on Ammonia Slip and Control of Diesel Engine SCR System

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价