论文部分内容阅读
目的:研究余热回收中的新型烧结矿立式冷却装置填充床的阻力特性,揭示烧结矿填充床宏观特性参数和空隙流动状态,提出适用于烧结矿的阻力特性公式。创新点:1.采用实验方法,获取全面的复杂异形烧结矿颗粒宏观特性数据;2.通过实验测量,提出适用于烧结矿填充床的修正型Ergun阻力方程。方法:1.采用多种实验方法,测量烧结矿的颗粒粒度、球形度和堆积空隙率等宏观特性参数;2.通过阻力实验数据分析,得到烧结矿填充床的宏观特性参数和堆积空隙流动状态;3.通过实验数据拟合,提出适用于烧结矿的阻力特性公式。结论:1.表观流速为0.4?2.4 m/s时烧结矿填充床堆积空隙流动状态由层流过渡到湍流;2.Ergun方程的不规则异形颗粒的阻力预测值比实验值偏低约40%;3.提出的修正型Ergun预测公式能够预测颗粒雷诺数500至12 000的烧结矿填充床阻力,预测误差在10%以内。
OBJECTIVE: To study the resistance characteristics of the packed bed of the new sinter vertical cooling device in waste heat recovery, to reveal the macroscopic characteristic parameters and the flow state of the void in the sinter bed, and to propose the formula of resistance characteristic suitable for sinter. Innovative points: 1. Using experimental methods to obtain a comprehensive complex shaped sinter particles macro-characteristics of the data; 2. Through experimental measurements, proposed for sintered sinter bed modified Ergun resistance equation. Methods: 1. A variety of experimental methods were used to measure the macroscopic parameters such as particle size, sphericity and void fraction of sinter; 2. By the analysis of resistance experiment data, the macroscopic characteristic parameters of sinter packed bed and the flow state of accumulated voids ; 3. Through the experimental data fitting, put forward the formula for the resistance characteristics of sinter. CONCLUSIONS: 1. The void flow in the packed beds of sinter transition from laminar to turbulent with an apparent flow rate of 0.4-2.4 m / s. 2. The predicted value of the resistance of irregular shaped particles in Ergun equation is about 40 lower than the experimental value %; 3. The modified Ergun prediction formula proposed can predict the resistance of sinter bed packed bed with a Reynolds Number of 500 to 12000 with a prediction error of less than 10%.