Experimental Investigations on a Grate Incinerator of L-shaped Flame Fueled by Rural Solid Waste
Abstract
In this article, investigations on the structural parameters and aerodynamic characteristics of the furnace arches of a small scale L-shaped flame incinerator for the disposal of rural solid waste are carried out. A novel configuration of furnace arches for the incinerator of L-shaped flame is developed. Eight different test conditions are determined by using orthogonal experimental design method. Cold test with full coverage arch and sub-warehouse air supply are analyzed under eight different test conditions. Experimental results show that a stable combustion can be obtained by using L-shaped flame technology and the optimum air supply ratio between the front arch and the rear arch is discovered to be 3:7. It is found that the maximum turbulence intensity along the length of grate can reach 10%, and the burning exuberant zone is approximately 40%~75% of the whole relative length of the grate. The optimum dimensionless structural parameters of the furnace arch are: H/L = 0.333 and h/L = 0 .12 with the front arch angle of 45º. The effectiveness of configuration of arches as well as combustion air supply ratio for the L-shaped flame grate incinerator fueled by rural solid waste is verified by hot test.References
Yang, B.Y. Vida, N.S. and Jim, S. (2007). Converting moving-grate incineration from combustion to gasification-Numerical simulation of the burning characteristics. Waste Management. Volume: 27. 645 – 655.
Wang, Y.N. (2010). Study of the status quo of the power generation through the incineration of daily-life refuse in big cities in China and its development. Macroeconomic Research. Volume: 11. 12 – 23.
Chen, D. and Tang, M.H. (2010). Practice of power generation through the refuse incineration in Europe and America and its popularization in China. Journal of Chongqing Institute of Science and Technology. Volume: 11. 63 – 64.
Kuang, M. Li, Z.Q. Zhu, Q.Y. and Liu, C.L. (2013). Arch- and wall-air distribution optimization for a down-fired 350 MWe utility boiler: A cold-modeling experimental study accompanied by real-furnace measurements. Applied Thermal Engineering. Volume: 54. 226 – 236.
Liu, G.K. Chen, Z.C. Li, Z.Q. Li, G.P. and Zong, Q.D. (2015). Numerical simulations of flow, combustion characteristics, and NOx emission for down-fired boiler with different arch-supplied over-fire air ratios. Applied Thermal Engineering. Volume: 75. 1034 – 1045.
Zhang, D.L. Meng, C.W. Zhang, H. Zhang, H. Liu, P.Y. Li, Z.H. Wu, Y.X. Lu, J.F. Zhou, W. Ran, S.M. and Zhang, D.H. (2016). Studies on heat flux distribution on the membrane walls in a 600 MW supercritical arch-fired boiler. Applied Thermal Engineering. Volume: 103. 264 – 273.
Li, J.J. Luo, Y.H. and Hu, L.Y. (2008). Study on the mechanism of unsteady combustion related to volatile in a coal-fired traveling grate boiler. Applied Thermal Engineering. Volume: 28. 145 – 156.
Lin, P.Y. Ji, J.J. Luo, Y.H. and Wang, Y. (2009). A non-isothermal integrated model of coal-fired traveling grate boilers. Applied Thermal Engineering. Volume: 29. 3224 – 3234.
Yu, Z.S. Ma, X.Q. and Liao, Y.F. (2010). Mathematical model of combustion in a grate-fired boiler burning straw and effect of operating conditions under air- and oxygen-enriched atmospheres. Renewable Energy. Volume: 35. 895 – 903.
Lin, H. and Ma, X.Q. (2012). Simulation of co-incineration of sewage sludge with municipal solid waste in a grate furnace incinerator. Waste Management. Volume: 32. 561 – 567.
Asim, T. Oliveira, A. Charlton, M. and Mishra, R. (2019). Improved Design of a Multi-Stage Continuous-Resistance Trim for minimum Energy Loss in Control Valves. Energy. Volume: 174. 954 – 971.
Asim, T. Oliveira, A. Charlton, M. and Mishra, R. (2019). Effects of the Geometrical Features of Flow Paths on the Flow Capacity of a Control Valve Trim. Petroleum science and Engineering. Volume: 172. 124 – 138.
Asim, T. Algadhi, A. and Mishra, R. (2018). Effect of Capsule Shape on Hydrodynamic Characteristics and Optimal Design of Hydraulic Capsule Pipelines. Journal of Petroleum Science and Engineering. Volume: 161. 390 – 408.
Asim, T. Charlton, M. and Mishra, R. (2017). CFD based Investigations for the Design of Severe Service Control Valves used in Energy Systems. Energy Conversion and Management. Volume: 153. 288 – 303.
Asim, T. and Mishra, R. (2017). Large Eddy Simulation based Analysis of Complex Flow Structures within the Volute of a Vaneless Centrifugal Pump. Sadhana. Volume: 42. 505 – 516.
Asim, T. and Mishra, R. (2016). Optimal design of hydraulic capsule pipelines transporting spherical capsules. Canadian Journal of Chemical Engineering. Volume: 94. 966 – 979.
Asim, T. and Mishra, R. (2016). Computational Fluid Dynamics based Optimal Design of Hydraulic Capsule Pipelines Transporting Cylindrical Capsules. International Journal of Powder Technology. Volume: 295. 180 – 201.
Asim, T. Mishra, R. Abushaala, S. and Jain, A. (2016). Development of a Design Methodology for Hydraulic Pipelines Carrying Rectangular Capsules. International Journal of Pressure Vessels and Piping. Volume: 146. 111 – 128.
Wissing, F. Wirtz, S. and Scherer, V. (2017). Simulating municipal solid waste incineration with a DEM/CFD method–Influences of waste properties, grate and furnace design. Fuel. Volume: 206. 638 – 656.
Kurz, D. Schnell, U. and Scheffknecht, G. (2013). Euler-Euler simulation of wood chip combustion on a grate–effect of fuel moisture content and full scale application. Progress in Computational Fluid Dynamics. Volume: 13. 322 – 332.
Wang, J.F. Xue, Y.Q. Zhang, X.X. and Shu, X.R. (2016). Numerical study of radiation effect on the municipal solid waste combustion characteristics inside an incinerator. Waste Management. Volume: 44. 116 – 124.
Mahmoudi, A.H. Besseron, X. Hoffmann, F. Markovic, M. and Peters, B. (2016). Modeling of the biomass combustion on a forward acting grate using XDEM. Chemical Engineering Science. Volume: 142. 32 – 41.
Yao, B.Y. Sharifi, V.N. and Swithenbank, J. (2007). Converting moving-grate incineration from combustion to gasification-Numerical simulation of the burning characteristics. Waste Management. Volume: 27. 645 – 655.
Thunman, H. (2013). Modelling and verifying experiments on the whole furnace, in principles and models of solid fuel combustion. PhD Thesis, Chalmers University of Technology, Sweden.
Shin, D. and Choi, S. (2000). The combustion of simulated waste particles in a bed. Combustion and Flame. Volume: 121. 167 – 180.
Peters, B. (2003). Thermal Conversion of Solid Fuels. Mechanical Engineering. Volume: 8. 67.
Gómez, M.A. Porteiro, J. Patiño, D. and Míguez, J.L. (2014). CFD modelling of thermal conversion and packed bed compaction in biomass combustion. Fuel. Volume: 117. 716 – 732.
Adams, T.N. (1980). A simple fuel bed model for predicting particulate emissions from a wood waste boiler. Combustion and Flame. Volume: 39. 225 – 239.
Beckmann, M., Scholz, R., (1995), Simplified mathematical model of combustion in stoker systems in Proc. 3rd European Conference on Industrial Furnaces and Boilers, Porto, Potrugal.
Karim, M., Naser, J., (2014), Progress in Numerical Modeling of Packed Bed Biomass Combustion in Proc. 19th Australasian Fluid Mechanics Conference (AFMC), Melbourne, Australia.
Frey, H.H. Peters, B. Hunsinger, H. and Vehlow, J. (2003). Characterization of municipal solid waste combustion in a grate furnace. Waste Management. Volume: 23. 689 – 701.
Lin, H. and Ma, X.Q. (2012). Simulation of co-incineration of sewage sludge with municipal solid waste in a grate furnace incinerator. Waste Management. Volume: 32. 561 – 567.
Sakai, S. and Hiraoka, M. (2000). Municipal solid waste incinerator residue recycling by thermal processes. Waste Management. Volume: 20. 249 – 258.
Jiang, S., Lv, W., Gao, W.X., Qi, G.L., Zhang, S.S., Li, Y.Q., (2017), Study on the Influence of Furnace Arch Structure on the Combustion Characteristics of Chain Furnace in Proc. 2nd International Conference on Electrical, Automation and Mechanical Engineering, Shanghai, China.
Assis, C.F.C. Tenorio, J.A.S. Assis, P.S. and Nath, N.K. (2014). Experimental Simulation and Analysis of Agricultural Waste Injection as an Alternative Fuel for Blast Furnace. Energy Fuels. Volume: 28. 7268 – 7273.
Raj, T. Kapoor, M. Gaur, R. Christopher, J. Lamba, B. and Tuli, D.K. (2015). Physical and Chemical Characterization of Various Indian Agriculture Residues for Biofuels Production. Energy Fuels. Volume: 29. 3111 – 3118.
Chu, J.F. (2014). Numerical simulation study on influence of arch and air distribution mode for combustion performance in reciprocating furnace. PhD Thesis, Harbin Institute of Technology, Harbin, China.
Qian, H.Q. and Miao, Z.Q. (2007). Numerical of air flow in arches of grate stokers. Energy conservation. Volume: 26. 20 – 21.
Huang, X.X. (1984). Characteristics of furnace arch of fire furnace. Chinese Journal of Power Engineering. Volume: 2. 22 – 28.
Ma, X.Q. Yang, Z.L. and Chen, L.Q. (1996). The methods of raising the efficiency of waste incineration power generation. New Energy. Volume: 18. 42 – 45.
Miu, Z.Q. Huang, X.X. Yang, D. Yu, G.Q. and Huang, J.W. (1996). Study on Heat Transfer and Its Effect on the Fire Bed Burning in Arch Rear Area of Fire-bed Furnace. Industrial Boiler. Volume: 4. 18 – 24.
Hui, S.E. Xu, T.M. Liu, Z.J. and Jiang, H.Z. (1994). A New Method for Designing a Fire Hearth Furnace Arch with Strongly Actuated α Flames. Thermal Power Engineering. Volume: 5. 280 – 284.
Ma, X.Q. (1997). Design method for waste incineration boiler and its combustion stability. New Energy. Volume: 19. 9 – 12.
Cen, K.F. and Fan, J.R. (1991). Combustion Fluid Dynamics, 1st ed., China Water Power Press, Beijing, China.
Author(s) by submitting the manuscript to the International Journal of COMADEM agree to transfer the rights to COMADEM International UK with some exceptions as described in COPYRIGHT TRANSFER AGREEMENT available here.
