罐式煅烧炉内石油焦热解挥发分迁移路径影响机制  

Influence mechanism of migration path of petroleum coke pyrolysis volatiles in a vertical shaft calciner

作　　者：黄金堤[1] 张豆 李静[1] HUANG Jindi;ZHANG Dou;LI Jing(Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学材料冶金化学学部,江西赣州341000

出　　处：《中南大学学报（自然科学版）》2023年第2期465-476,共12页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(52004112);江西省教育厅科学技术研究项目(GJJ200848);江西理工大学清江青年英才支持计划项目(JXUSTQJYX2020016);江西理工大学高层次人才科研启动项目(205200100517);江西省闪速绿色开发与循环利用重点实验室计划项目(20193BCD40019)。

摘　　要：采用计算流体力学(CFD)技术构建罐式炉煅烧石油焦过程仿真模型,研究不同因素对罐内压力及挥发分走向的影响规律。研究结果表明:(1)颗粒粒度是控制罐内压力和挥发分走向的最重要且最有效的因素。当等效粒径d_(p)为1 mm时,在L2~L8火道对应的料罐区域,罐内处于正压状态,挥发分热解气体存在向下迁移趋势,易造成“下火放炮”炉况异常。(2)适当提高火道温度、降低单位排料量和挥发分含量也是抑制“下火放炮”炉况异常的有效措施。火道温度越高,料罐中心的压力越低,料罐出口的热解气体泄漏量也随之降低。单位排料量和挥发分含量越大,料罐中心的压力也越大,料罐出口的热解气体泄漏量也相应增加。研究成果可为揭示“下火放炮”的本质,确保罐式炉稳定运行及节能降耗提供理论基础。A simulation model of the calcined petroleum coke process in a vertical shaft calciner was constructed by using CFD technology. The influence of different factors on the pressure and the migration path of volatiles in the pot was studied. The results show that the particle size is the most important and effective factor in controlling the pressure and volatile orientation in the pot. When the equivalent particle size d_(p) is 1 mm, the pot is in a state of positive pressure in the area corresponding to the L2-L8 fire channel, and the volatile matter has a downward migration trend, which is very likely to cause abnormal furnace conditions of "fire and blowout". Moreover,properly increasing the temperature of the fire channel and reducing the discharge rate and volatile content are also effective measures to suppress the abnormal furnace conditions of "fire and blowout". The higher the temperature of the fire channel, the lower the pressure in the center of pot, and the leakage of pyrolysis gas at the outlet of the pot is also reduced. The greater the discharge rate and volatile content, the greater the pressure in the center of the pot, and the leakage of pyrolysis gas from the pot outlet is also increased accordingly. The research results can provide a theoretical basis for revealing the essence of "fire and blowout", ensuring the stable operation of the furnace and saving energy and reducing consumption.

关 键 词：罐式煅烧炉 挥发分行为 下火放炮 计算流体力学(CFD) 

分 类 号：TF806.1[冶金工程—有色金属冶金]