焦炉装平煤过程的离散元模拟优化  

Optimization of Coal Loading and Leveling Process in Coke Oven Based on the Simulation with Discrete Element Method

作　　者：朱君伟 金浩[1] 曹银平[2] 杨俊和[3] 黄婕[1] ZHU Jun-wei;JIN Hao;CAO Yin-ping;YANG Jun-he;HUANG Jie(School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;Shanghai Baoshan Iron and Steel Co., Ltd., Shanghai 201900, China;School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

机构地区：[1]华东理工大学化工学院,上海200237 [2]上海宝山钢铁股份有限公司,上海201900 [3]上海理工大学材料科学与工程学院,上海200093

出　　处：《科学技术与工程》2020年第32期13327-13332,共6页Science Technology and Engineering

基　　金：国家自然科学基金钢铁联合基金(U1760119)。

摘　　要：目前炼焦煤的供应日趋紧张,在现有设备下提高焦炉的单孔装煤量成为研究重点。由于物理实验研究不仅耗费劳动力且有很大的不确定性,建立了以离散元为基础的仿真模型,研究焦炉炭化室的装平煤过程。结果表明,由于炭化室结构造成的壁面效应,不同区域的煤料配位数和散密度相差明显,导致机侧和焦侧缺角严重,装煤不满的现象。针对这个问题,通过改变不同落煤口的装煤顺序,发现在靠近焦侧和机侧的落煤口先落煤时,煤料能够为两侧减少缺角提供支持,从而有效地提高了总装煤量。关于平煤过程,研究确定了一种两次长平煤和两次短平煤相结合的方式,对炭化室内煤料起到了压实、压匀的作用,并明显改善了焦侧缺角的问题。Recently,the supply of coking coal is becoming increasingly tight,and increasing the coal charge quantity of a single hole of coke ovens under existing equipment has become a research focus.But the traditional physical experiments are labor-intensive and of highly uncertainty.Therefore,a simulation model based on the discrete element method was established to study the coal loading and leveling process in the carbonization chamber.The results show that due to the wall effect caused by the structure of the carbonization chamber,the coordination number and bulk density of the coal in different regions are significantly different.It results in the serious gap between the machine side and the coke side and the phenomenon of coal loading dissatisfaction.In view of this problem,by changing the loading sequence of different coal drop ports,it is found that when the coal drop ports near the coke side and the machine side first drop coal,the coal can provide support for gaps on both sides,thus effectively increasing the total coal weight.As for the flat coal process,a combination of two long flat coals and two short flat coals has been determined.It can compact and homogenize the coal material in the carbonization chamber,and significantly improve the coke side angle problem.

关 键 词：离散单元法 炭化室 装平煤 数值模拟 

分 类 号：TQ520.6[化学工程—煤化学工程]