Simulation and optimization of pellet cooling process in rotating annular cooler
JIANG Qian1,SONG Yan-po1,PENG Xiao-qi1,2
1. School of Energy Science and Engineering, Central South University, Changsha 410083, Hunan, China 2. Department of Information Science and Engineering, Hunan First Normal University, Changsha 410205,Hunan, China
Abstract��To investigate the cooling influence of structural parameters and operating parameters on pellets in rotating annular cooler and the optimization ways for process energy-saving and consumption reduction, a non-equilibrium model of heat transfer between gas and solid in the pellet bed was established with double-energy equation, and the reaction rate model for the main reaction in the material layer (the oxidation of magnetite) was developed with ��unreacted core model��. Numerical simulations for the pellet cooling process under different operating conditions were carried out with Matlab. The simulation results indicate that under the condition of keeping the product output and cooling effect unchanged, when the pellet bed thickness is twice as large as the original condition, the exhaust temperature of the three segments respectively increases by 50, 71, 33�� and the air consumption is reduced by 23. 6%, that is to say, increasing the material layer thickness properly is beneficial to energy recovery and air consumption reduction.
��ٻ�������£���С�� . �������������ȴ���̵ķ������Ż�[J]. �й������ڿ���, 2015, 27(6): 12-17.
JIANG Qian,SONG Yan-po,PENG Xiao-qi,. Simulation and optimization of pellet cooling process in rotating annular cooler. Chinese Journal of Iron and Steel, 2015, 27(6): 12-17.
2015, Vol. 27 
