Effect of Slot Wall Jet on Combustion Process in a 660 MW Opposed Wall Fired Pulverized Coal Boiler
-
Yong Zhang
,
Yao Fang
Abstract
Numerical investigations of an anti-corrosion design and the combustion process (original conditions and optimal conditions) were conducted for a 660 MW opposed wall fired boiler. In order to solve high-temperature corrosion of the side wall, a scheme was proposed: slotting in the side wall and introducing air (closing-to-wall air) from the secondary air. The effect of anti-corrosion was disclosed in detail by varying the structures of slotting, gas velocities from nozzles and jet inclination angles. The temperature and NOx distribution in the furnace at optimized conditions were compared with those at the original operating conditions. Simulation results showed that the structures of the slot and gas velocities from the nozzles had a marked effect on anti-corrosion of the side wall. When the gas velocity was 4 m/s, an inclination angle of the gas velocity was not conducive to anti-corrosion of the side wall. When the gas velocity increased at the middle and bottom of the side wall, the anti-corrosion effect increased significantly. When the optimal scheme was adopted, the corrosion area of the side wall decreased obviously, but the furnace temperature and the NOx emission increased slightly. The detailed results of this work promote a full understanding of closing-to-wall air and could help to reduce the corrosive area in pulverized-coal furnaces or boilers.
Acknowledgements
The authors gratefully acknowledge financial support from the National Key Research and Development Program of China (Grant No. 2018YFB0605102), A Foundation for the Author of National Excellent Doctoral Dissertation of PR China (201440) and the Fundamental Research Funds for the Central Universities.
References
Belosevic, Srdjan, Vladimir Beljanski, Ivan Tomanovic, Nenad Crnomarkovic, and Dragan Tucakovic. 2012. “Numerical Analysis of NOx Control by Combustion Modifications in Pulverized Coal Utility Boiler.” Energy Fuels 26(1): 425–42.10.1021/ef201380zSearch in Google Scholar
Chen, T., Y. Lu, J. Liu, Q. Huang, G. Chen, B. Jin, and Z. Yong. 2015. “Numerical Simulation on the Optimization of Closing-To-Wall Air in a 660 MW Front and Rear Wall Opposed Coal-Fired Boiler.” Proceedings of the Csee 35 (20): 5265–5271.Search in Google Scholar
Han, K. H., L. U. Chun-Mei, L. I. Guan-Peng, and J. Liu. 2004. “Current Situation and Discussion about Preventive Measure to the High Temperature Corrosion of Water-Wall Tubes in Large Boilers.” Power System Engineering 20 (2): 37–39.Search in Google Scholar
He, Z., H. Qi, Y. Yao, and L. Ruan. 2015. “Inverse Estimation of the Particle Size Distribution Using the Fruit Fly Optimization Algorithm.” Applied Thermal Engineering 88: 306–14.10.1016/j.applthermaleng.2014.08.057Search in Google Scholar
Hu, L., Y. Liu, G. Yi, N. Li, and D. Che. 2013. “Effects of Air Staging Conditions on the Combustion and NOx Emission Characteristics in a 600 MW Wall Fired Utility Boiler Using Lean Coal.” Energy & Fuels 27(10): 5831–40.10.1021/ef401354gSearch in Google Scholar
Jiang, B., F. G. Liu, K. Liu, and H. J. Liu. 2014. “Experimental Research on High Temperature Corrosion Prevention Technology for Water Wall of Opposed Wall Fired Ultra Supercritical Boiler.” Applied Mechanics & Materials 654: 69–73.10.4028/www.scientific.net/AMM.654.69Search in Google Scholar
Klein, D. H., A. W. Andren, J. A. Carter, J. F. Emery, C. Feldman, W. Fulkerson, W. S. Lyon, J. C. Ogle, and Y. Talmi. 1975. “Pathways of Thirty-Seven Trace Elements through Coal-Fired Power Plant.” Environmental Science & Technology 9: 10.10.1021/es60108a007Search in Google Scholar
Kohli, A., and D. G. Bogard. 1997. “Adiabatic Effectiveness, Thermal Fields, and Velocity Fields for Film Cooling with Large Angle Injection.” Journal of Turbomachinery 119(2): 352–58.10.1115/1.2841118Search in Google Scholar
Li, J., X. Zhuang, X. Querol, O. Font, N. Moreno, and J. Zhou. 2012. “Environmental Geochemistry of the Feed Coals and Their Combustion By-Products from Two Coal-Fired Power Plants in Xinjiang Province, Northwest China.” Fuel 95(95): 446–56.10.1016/j.fuel.2011.10.025Search in Google Scholar
Li, Zhengqi, Lingyan Zeng, Guangbo Zhao, Jing Li, Shanping Shen, and Fucheng Zhang. 2011. “Numerical Simulations of Combustion Characteristics and NOx Emissions for Two Configurations of Swirl Coal Burners in a 300 MWe Wall-Fired Boiler.” Numerical Heat Transfer 60(5): 441–60.10.1080/10407782.2011.600618Search in Google Scholar
Liang, S. H., H. Lei, and E. X. Zhang. 2009. “Study on On-Line Monitoring Technology for High Temperature Corrosion of Boilers.” Journal of Power Engineering 29 (12): 1093–1095.Search in Google Scholar
Liu, J. 2007. “Expermental Research on Flat Plate Film Cooling Effectiveness at Different Injection Angles.” Journal of Engineering Thermophysics 28(3): 409–11.Search in Google Scholar
Lu, Y., T. Chen, J. Liu, Q. Huang, G. Chen, B. Jin, and Z. Yong. 2015. “Influence of Closing-To-Wall Air on Combustion Process in 660MW Opposed Firing Boiler.” Journal of Southeast University 45(1): 85–90.Search in Google Scholar
Min, K., Z. Li, Z. Ling, X. Jing, and Q. Zhu. 2014. “Effect of Overfire Air Angle on Flow Characteristics within a Small-Scale Model for a Deep-Air-Staging Down-Fired Furnace.” Energy Conversion & Management 79(79): 367–76.10.1016/j.enconman.2013.12.012Search in Google Scholar
Mohr, S. H., and G. M. Evans. 2009. “Forecasting Coal Production until 2100.” Fuel 88(11): 2059–67.10.1016/j.fuel.2009.01.032Search in Google Scholar
Qiong, L. I., W. U. Yuxin, H. Yang, and L. Junfu. 2013. “Simulation and Optimization of SNCR Process.” Ciesc Journal 64 (5): 1789–1796.Search in Google Scholar
Qiu, Jihua, M Liming, Xuexin Sun, and Yonggang Liu. 1999. “The Corrosion of Water Wall in Wall Fired Boiler.” Journal of Huazhong University Ofence & Technology 27(1): 63–65.Search in Google Scholar
Ti, S., Z. Chen, M. Kuang, Z. Li, Q. Zhu, H. Zhang, Z. Wang, and G. Xu. 2016. “Numerical Simulation of the Combustion Characteristics and NO X Emission of a Swirl Burner: Influence of the Structure of the Burner Outlet.” Applied Thermal Engineering 104: 565–76.10.1016/j.applthermaleng.2016.05.079Search in Google Scholar
Wang, J., K. Zheng, R. Singh, H. Lou, J. Hao, B. Wang, and F. Cheng. 2017. “Numerical Simulation and Cold Experimental Research of a low-NO X Combustion Technology for Pulverized Low-Volatile Coal.” Applied Thermal Engineering 114: 498–510.10.1016/j.applthermaleng.2016.11.204Search in Google Scholar
Wu, Z., Z. N. Zhuang, T. S. Liu, G. U. Jie, and H. C. Xia. 2005. “Study on Slagging Problem in the Furnace of a Tangential Fired Boiler.” Proceedings of the Csee 25(4): 131–35.Search in Google Scholar
Xiu-Qing, X. U., and R. L. Zeng. 2001. “High Temperature Corrosion of Water Wall for Tangentially Fired Boiler Furnace.” Power System Engineering 17 (2): 77–79.Search in Google Scholar
Yang, W., R. You, Z. Wang, H. Zhang, Z. Zhou, J. Zhou, J. Guan, and L. Qiu. 2017. “Effects of Near-Wall Air Application in a Pulverized-Coal 300 MWe Utility Boiler on Combustion and Corrosive Gases.” Energy & Fuels 31(9): 10075–81.10.1021/acs.energyfuels.7b01476Search in Google Scholar
Zhang, J. B. 2011. “Research on High-Temperature Corrosion of Ultra-Supercritical Opposed Firing Boiler.” Zhejiang Electric Power 30 (4): 4– 6.Search in Google Scholar
Zhixiang, Zhang, Cheng Dingnan, Wang Yungang, and Zhao Qinxin. 2011. “Structure Design and Optimizing Simulation of a New Type Closing-To-Wall Air Device.” Journal of Chinese Society of Power Engineering 31(2): 79–84.Search in Google Scholar
Zhou, H., G. Mo, D. Si, and K. Cen. 2011. “Numerical Simulation of the NOx Emissions in a 1000 MW Tangentially Fired Pulverized-Coal Boiler: Influence of the Multi-Group Arrangement of the Separated over Fire Air.” Energy & Fuels 25(5): 2004–12.10.1021/ef200227rSearch in Google Scholar
Zhou, H., Y. Yang, H. Liu, and Q. Hang. 2014. “Numerical Simulation of the Combustion Characteristics of a Low NO X Swirl Burner: Influence of the Primary Air Pipe.” Fuel 130(5): 168–76.10.1016/j.fuel.2014.04.028Search in Google Scholar
Zhou, Y. G., L. I. Pei, A. O. Xiang, and Z. Hong. 2015. “High Temperature Corrosion Inhibition for Opposed Firing Boiler Based on Combustion Distribution Evenness.” Journal of Zhejiang University 49 (9): 1768–1775.Search in Google Scholar
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- Effect of Slot Wall Jet on Combustion Process in a 660 MW Opposed Wall Fired Pulverized Coal Boiler
Articles in the same Issue
- Review
- Steam Reforming of Biomass Pyrolysis Oil: A Review
- Research Articles
- Characterization of Highly Active Al2O3-TiO2 Supported Pt and Pd Catalysts for Hydrodechlorination of 1,2-Dichloroethane
- Simulation of Methanol Carbonylation Reactor in Acetic Acid Production Plant: Selection of an Appropriate Correlation for Mass Transfer Coefficients
- Batch Adsorption of Synthetic Dye by Maclura Pomifera, a New Eco-Friendly Waste Biomass: Experimental Studies and Modeling
- Scale-Up of Shear Thinning Fluid Mixing in an Unbaffled Stirred Vessel with Eccentrically Located and Modified Impellers
- Hydrogenation of Dibenzo-18-Crown-6 Ether Using γ-Al2O3 Supported Ru-Pd and Ru-Ni Bimetallic Nanoalloy Catalysts
- Numerical Simulation of Gas-Liquid Dispersion in A Stirred Tank Agitated by Punched Rigid-Flexible Impeller
- RTD Measurement, Modeling, and Analysis of Liquid Phase of Three-Tube Industrial Pulp Digester
- Bio-Crude by Acidic Phenolation and Carbamation for the Preparation of Phenolic Thermosetting Resin and Its Application in Thermoresistant Laminates
- Effect of Slot Wall Jet on Combustion Process in a 660 MW Opposed Wall Fired Pulverized Coal Boiler
