The dynamic model of pulverized coal and waste plastic bonded together in flight combustion process
- 76 Downloads
A mathematical model was established which describes the co-combustion of pulverized coal (PC) and polyethylene particles (PEP) in this study. The model was designed to be incorporated into an overall model simulating PC and PEP process. The combustion model of PC and PEP takes into account the principal physical and chemical phenomena occurring during the pyrolysis and combustion of PC and PEP blend combustion, namely, mass transfer toward and exterior the grain, volatile combustion of PC and PEP, combustion of fixed carbon. Particular care has been taken in the determination of the thermophysical and kinetic parameters necessary for the model. Thus the pyrolysis and combustion kinetics for PC and PEP were determined by thermogravimetry. In order to simulate the flight co-combustion process of PC and PEP blend, the true conversion rates during combustion process of PC and PEP were measured as a function of temperature. The numerical model, calculates the temperature, composition, and mass flow rates of the PC and particles evolved at each point in the grain at any instant of time. In the end, the combustion model has proved to be valid by the comparison between calculated and measured data of the co-combustion process of PC and PEP.
KeywordsRotary kiln Pulverized coal Waste particles volatile Fixed carbon combustion Combustion model
This work was financially supported by The National Natural Science Foundation of China (Nos. 51474124, 51504132, 51674139).
- 1.Guo, J., Zhao, J., Chou, S.: Application status and suggestion of waste plastic used in iron and steel industry [J]. J. Iron Steel Res. 26(6), 1–4 (2014)Google Scholar
- 2.Zhenguo, Z., Hongqiang, L., Guangwei, Y., Peng, Z.: Analysis of tar from co-coking of coal and waste plastic [J]. Coal Chem. Ind. 4, 41–44 (2009)Google Scholar
- 4.Qian, H., Zhou, Y.: Study of coke making experiments with different waste plastic blending [J]. Iron Steel 45(1), 96–103 (2010)Google Scholar
- 5.Li, J., Wang, H., Jin, H., Wang, J.: Study on comelting injection technology of coal and waste plastic [J]. J. Mater. Metall. 6(3), 163–168 (2007)Google Scholar
- 6.Li, J., Wang, H., Wu, F.: Experimental study on pulverized coal and waste plastic mixture combustion under blast furnace simulating blasting temperature [J]. Energy Conserv. 3, 6–8 (2006)Google Scholar
- 7.Artetxe, M., Lopez, G., Amutio, M., Elordi, G., Bilbao, J., Olazar, M.: Light olefins from HDPE cracking in a two-step thermal and catalytic process. Chem. Eng. J. 27, 207–208 (2012)Google Scholar
- 10.Liu, Y.B., Ma, X.B., Chen, D.Z., Zhao, L., Zhou, G.M.: Copyrolysis characteristics and kinetic analysis of typical constituents of plastic wastes. Proc. CSEE 30, 56–61 (2010)Google Scholar
- 18.Wu, Fuzhong, Huixin, Jin, Junqi, Li: Numerical simulation of combustion processes of injecting coal and waste plastics blends in BF. J. Iron Steel Res. 23(3), 11–14 (2011)Google Scholar
- 19.Zhao, W., Wang, Q., Liu, H., Zhou, Z.: Study on thermogravimetry kinetics and thermokinetics of plastic combustion [J]. J. Mater. Metall. 11(1), 70–74 (2012)Google Scholar
- 20.Zhou, L.: Combustion theory and chemical fluid mechanics [M], pp. 178–183. Science Press, Beijing (1986)Google Scholar