基于环冷机集热罩的烧结矿余热回收优化

利用仿真实验方法,对烧结矿料层孔隙率、颗粒粒径、烧结矿初始温度、料层高度、冷却空气入口温度、冷却空气入口风速等因素对集热罩内热烟气平均温度的影响进行分析.对各个影响因素进行仿真实验并将仿真结果进行曲线拟合,得到其与集热罩内烟气平均温度的拟合曲线.利用待定系数法和各个因素的幂函数构造线性函数组合,得到其函数关系式,利用此关系式可以对热烟气平均温度进行预测;将其与测试数据对比,其误差小于8%.利用此关系式对传统集热罩布置方式进行分析,针对其不合理性,提出了优化的集热罩恒温布置方式.

Optimization of Heat Recovery of Sinter Ore with Heat-Collecting Hood of Circular Cooler

The effects of some factors, including bed voidage, particle size, bed thickness, temperature and velocity of inlet air and sinter temperature, on the average temperature of air in heat-collecting hood on circular cooler of sinters were analyzed by simulation. The curves and the corresponding functions which describe the relationship between the average temperature of air and the factors were obtained by fitting the simulation results. A semiempirical function was developed with the method of undetermined coefficients and the fitting functions. Using the semiempirical function, the temperature of air can be predicted with error less than 8% compared with the test results. The arrangement of the traditional heat collecting hood was analyzed with the semiempirical function. In order to decrease the energy loss and increase the efficiency of waste heat recovery of sinter, an optimized collecting hood arrangement was proposed.