Simulation and Emission Reduction Optimization of NOx Generation in Cement Kiln Based on Aspen Plus

Abstract

Abstract: Aiming at the whole process of NO_x generation in the calciner and rotary kiln in the production process of cement kilns, the Aspen Plus software was used to establish a simulation model of the system, and the reliability of the model was verified by field test data. Then the model simulation was used to study the influences of temperature and combustion atmosphere in the calciner on NO_x. It is concluded that the temperature in the calciner changes from 804 ℃ to 1 050 ℃, and the NO_x concentration changes from 242 mg/m³ to 800 mg/m³. After the calciner temperature exceeds 900 ℃, the NO_x concentration rises sharply. The CO concentration in the calciner changes from 26 mg/m³ to 990 mg/m³, and the NO_x concentration drops from 585 mg/m³ to 154 mg/m³. The NO_x concentration in the calciner is greatly affected by the flue gas temperature in the rotary kiln. When the flue gas temperature of the rotary kiln rises from 900 ℃ to 1 400 ℃, the NO_x concentration in the calciner changes from 260 mg/m³ to 430 mg/m³. It is feasible to use Aspen Plus to simulate the NO_x changes of cement kilns, and the model setting is flexible, which can provide parameter optimization and data support for the NO_x control of cement kilns.

Key words: calciner, rotary kiln, NO_x concentration, Aspen Plus, model, factor analysis

CLC Number:

TK09

LIU Dingping, ZHOU Youkun. Simulation and Emission Reduction Optimization of NO_x Generation in Cement Kiln Based on Aspen Plus[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(2): 351-358.

References

[1] CHEN C, CHENG S S, GUO X B. Hazard control of NO_x in hot stove[J]. Journal of Iron and Steel Research, International, 2014, 21(3): 306-311.
[2] 李佳.分解炉内煤粉燃烧与碳酸钙分解的数值模拟[D].长沙:湖南大学,2013.
LI J. Numerical simulation of the calciner with coal's combustion and decomposition of calcium carbonate[D]. Changsha: Hunan University, 2013 (in Chinese).
[3] 徐顺生,张丽娜,石永彬,等.分解炉混煤高效低NO_x燃烧最佳窑尾烟气速率的模拟研究[J].硅酸盐通报,2014,33(3):547-552.
XU S S, ZHANG L N, SHI Y B, et al. Simulation study on the better flue gas velocity of high efficiency and low NO_x combustion of coal blends in the calciner[J]. Bulletin of the Chinese Ceramic Society, 2014, 33(3): 547-552 (in Chinese).
[4] 王为术,廖义涵,田苗,等.分解炉分级燃烧三次风配风优化[J].科学技术与工程,2019,19(30):159-165.
WANG W S, LIAO Y H, TIAN M, et al. Optimization of tertiary air velocity distribution of staged combustion in the precalciner[J]. Science Technology and Engineering, 2019, 19(30): 159-165 (in Chinese).
[5] 徐顺生,赵鹏飞,刘小宇,等.燃用无烟煤分解炉分风降氮数值模拟研究[J].硅酸盐通报,2018,37(12):4027-4033.
XU S S, ZHAO P F, LIU X Y, et al. Numerical simulation study of decreasing NO_x combustion of anthracite on the condition of the air staging in precalciner[J]. Bulletin of the Chinese Ceramic Society, 2018, 37(12): 4027-4033 (in Chinese).
[6] 王世杰,陆继东,李卫杰,等.水泥回转窑内NO生成的模拟[J].化工学报,2006,57(11):2631-2637.
WANG S J, LU J D, LI W J, et al. Numerical simulation of NO formation in cement rotary kiln[J]. Journal of Chemical Industry and Engineering (China), 2006, 57(11): 2631-2637 (in Chinese).
[7] ILIUTA I, DAM-JOHANSEN K, JENSEN A. Modelling of in-line low-NO_x calciners—NO_x emission[J]. Chemical Engineering Research and Design, 2003, 81(5): 537-548.
[8] TAN Y W, CROISET E, DOUGLAS M A, et al. Combustion characteristics of coal in a mixture of oxygen and recycled flue gas[J]. Fuel, 2006, 85(4): 507-512.
[9] 金保升,朱颖,王小芳.用吉布斯自由能最小化方法模拟垃圾气化熔融工艺[J].中国电机工程学报,2007,27(26):46-51.
JIN B S, ZHU Y, WANG X F. Simulation of gasification and melting of municipal solid waste by method of Gibbs free energy minimization[J]. Proceedings of the CSEE, 2007, 27(26): 46-51 (in Chinese).
[10] LI C Y, GAO Y H, XIA S Q, et al. Calculation of the phase equilibrium of CO₂-hydrocarbon binary mixtures by PR-BM EOS and PR EOS[J]. Transactions of Tianjin University, 2019, 25(5): 540-548.
[11] 韩进有,王艺璇.分解炉和回转窑用煤比例的探讨[J].水泥,2014(4):30-31.
HAN J Y, WANG Y X. Discussion on coal proportion for decomposition furnace and rotary kiln[J]. Cement, 2014(4): 30-31 (in Chinese).
[12] 岳鹏程,孟志东,梁晓瑜.煤质工业分析转换元素分析数学模型研究[J].中国计量学院学报,2013,24(3):327-330.
YUE P C, MENG Z D, LIANG X Y. Study on mathematical models for quick-calculating ultimate analysis from proximate analysis[J]. Journal of China University of Metrology, 2013, 24(3): 327-330 (in Chinese).
[13] 董桢.水泥窑协同处理城市生活垃圾系统研究[D].郑州:郑州大学,2016.
DONG Z. Research on system of cement kiln Co-processing with municipal solid wastes incineration[D]. Zhengzhou: Zhengzhou University, 2016 (in Chinese).
[14] 张三梅.DD分解炉分级燃烧减排NO_x的数值模拟及优化研究[D].武汉:武汉理工大学,2012.
ZHANG S M. Numerical simulation of low-NO_x staging combustion and optimization research in DD prcealciner[D]. Wuhan: Wuhan University of Technology, 2012 (in Chinese).
[15] 王美琪,陈恩利,郭文武,等.高温熟料非稳态非热平衡渗流换热模型[J].计量学报,2019(3):432-439.
WANG M Q, CHEN E L, GUO W W, et al. Seepage heat transfer model with thermal non-equilibrium of high temperature clinker[J]. Acta Metrologica Sinica, 2019(3): 432-439 (in Chinese).
[16] 夏诺.基于Aspen Plus的磷石膏制酸联产水泥的模拟与分析[D].武汉:武汉工程大学,2018.
XIA N. Simulation and analysis of phosphogypsum and acid producing cement based on Aspen Plus[D]. Wuhan: Wuhan Institute of Technology, 2018 (in Chinese).
[17] 陈彦广,郭占成,王志.烧结过程中CO还原NO的模拟研究[J].钢铁研究学报,2009,21(1):6-9.
CHEN Y G, GUO Z C, WANG Z. Simulation of NO reduction by CO in sintering process[J]. Journal of Iron and Steel Research, 2009, 21(1): 6-9 (in Chinese).

Simulation and Emission Reduction Optimization of NO_x Generation in Cement Kiln Based on Aspen Plus

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	YU Bo, HUANG Junhui, WANG Jialiang, QIN Hecheng. Multi-Factor Prediction Model for Chloride Diffusion Coefficient Considering Material Parameters and Stress Level [J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(9): 3091-3099.
[2]	GAO Qiang, MEI Kaiyuan, WANG Dekun, ZHANG Liwei, ZHANG Chunmei, CHENG Xiaowei. CO₂ Corrosion Kinetics of C₃S in Cement Single Ore under CCUS Environment [J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(8): 2644-2653.
[3]	OUYANG Jianxin, GUO Rongxin, WAN Fuxiong, MA Qianmin, YANG Yang. Tensile Property and Crack Control Mechanism of Basalt Fiber Reinforced Polymer Bar Reinforced ECC [J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(8): 2684-2695.
[4]	SUN Jie, FENG Chuan, WU Shuang, MA Wen, SUN Mingxing. Damage Properties of Fiber Concrete under Coupling Effect of Continuous Loading and Freeze-Thaw Cycles [J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(8): 2728-2738.
[5]	JIA Fei, YAN Wanghu, PAN Huimin, TANG Jianhua, WANG Xuanming, GAO Kun. Effect of Initial Damage on Sulfate Attack Resistance of Shotcrete [J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(7): 2258-2267.
[6]	CHENG Gaoli, LI Xiaoguang, WANG Panqi, MA Ronggui. Influence of Fineness Change of Limestone Powder-Fly Ash on Hydration Kinetics of Cement-Based Cementitious Material System [J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(7): 2337-2343.
[7]	LU Mingyang, PANG Laixue, YANG Da, SONG Di, ZHANG Jiali, TIAN Xiaofeng, ZHANG Yiyang. Preparation and Thermodynamic Analysis of Steel Slag-Coal Based Solid Waste Controllable Low-Strength Materials [J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(7): 2344-2351.
[8]	LIAO Yishun, HUANG Weifeng, LI Hao, WANG Sichun. Effect of Steel Slag Powder on Hydration Process of Calcium Sulfoaluminate Cement and Thermodynamic Modelling [J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(7): 2376-2383.
[9]	HAO Yunhong, HE Dandan, WU Rigen, HE Xiaoyan. Research on Frost Damage of Ancient Building Blue Brick Wall of Longshengzhuang in Inner Mongolia [J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(7): 2438-2446.
[10]	HUANG Weifeng, LIAO Yishun, ZUO Yibing. Thermodynamic Modelling and Verification of Ye'elimite-Anhydrite-Limestone Hydration System [J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(6): 1861-1868.
[11]	FAN Xiaochun, XU Wei, CHEN Yuancheng, LIANG Tianfu, YIN Yaoxiao. Experimental Study and Numericals Simulation on Bond Performance of Basalt Fiber Reinforced Polymer Bars and Alkali Activated Concrete [J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(6): 1896-1911.
[12]	ZHANG Tianqi, WANG Boxin. Effect of Grid Size on Tensile Performance of Basalt Textile Reinforced Concrete [J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(6): 1938-1945.
[13]	CHEN Sihan, LYU Fangtao, HUANG Wei, WANG Lingling, KONG Dewen. Prediction of Equivalent Elastic Modulus for Concrete Based on Homogenization Theory [J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(5): 1609-1616.
[14]	ZHANG Jiaoyan, GONG Li, JIA Zhiyuan, LI Yiqiang, KANG Chuntao. Analysis on Influencing Factors of Durability of Hydraulic Concrete Based on Improved Matter-Element Extension Model [J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(5): 1617-1626.
[15]	ZONG Jingmei, ZHANG Xuelan, HAN Meng. Mechanical Properties and Three-Dimensional Prediction Model of Waste Ceramic Aggregate Concrete [J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(5): 1774-1781.