The mechanism of coke size segregation in the radial direction of pre-chamber in coke dry quenching （CDQ） shaft was investigated by experiment and numerical analysis. The experimental apparatus was a cold three-dime...The mechanism of coke size segregation in the radial direction of pre-chamber in coke dry quenching （CDQ） shaft was investigated by experiment and numerical analysis. The experimental apparatus was a cold three-dimensional semicircle model for bell-type charging, which was used to study the influences of different kinds of bells and different stock line levels on the radial distribution of coke size in the radial direction of a pre-chamber. A mathematical model was used, which is capable of estimating the radial average size distribution as well as the radial deposit distribution of each particle size for multiple size coke with a few fixed parameters. The calculated results agree well with the experimental data, which proves the reliability of both experimental study and numerical analysis.展开更多
Owing to its merits in energy savings, environmental protection and coke quality improvement, the Coke Dry Quenching (CDQ) technology is favorite in coke making industry today. In order to validate the mathematical mo...Owing to its merits in energy savings, environmental protection and coke quality improvement, the Coke Dry Quenching (CDQ) technology is favorite in coke making industry today. In order to validate the mathematical model developed for the cooling process of real CDQ shaft, the one-seventh scale experimental setup was established. With the air as the working fluid and the coke as the packed bed, the coke and gas temperatures and the pressure drop in the cooling shaft were measured. A mathematical model based on the non-Darcian and non-thermal equilibrium model for the cooling process of the CDQ experimental shaft was presented. The computational results were compared to the experimental data. It was found that most numerical predictions were supported by the measured values.展开更多
干熄焦用钢丝绳由于受气体侵蚀、粉尘黏附、红焦烘烤等原因,恶劣的工作环境对钢丝绳的综合性能要求很高。介绍6×K36WS+IWRC—30干熄焦用压实股钢丝绳试制过程,给出干熄焦提升用钢丝绳生产技术要求。选用直径8.0 mm SWRH77A盘条作...干熄焦用钢丝绳由于受气体侵蚀、粉尘黏附、红焦烘烤等原因,恶劣的工作环境对钢丝绳的综合性能要求很高。介绍6×K36WS+IWRC—30干熄焦用压实股钢丝绳试制过程,给出干熄焦提升用钢丝绳生产技术要求。选用直径8.0 mm SWRH77A盘条作为制绳钢丝原料,针对不同层成品钢丝直径选择的半成品钢丝直径分别为3.40,4.30,5.30,6.50 mm。拉丝采用多道次、小压缩率方法,股绳生产中采用股淋油,钢丝绳表面涂进口油脂,股绳捻距79.2～83.3 mm,左交互捻钢丝绳整绳破断拉力达784 kN,右交互捻钢丝绳整绳破断拉力达831 kN。使用表明该钢丝绳满足用户要求,可替代进口钢丝绳。展开更多
文摘The mechanism of coke size segregation in the radial direction of pre-chamber in coke dry quenching （CDQ） shaft was investigated by experiment and numerical analysis. The experimental apparatus was a cold three-dimensional semicircle model for bell-type charging, which was used to study the influences of different kinds of bells and different stock line levels on the radial distribution of coke size in the radial direction of a pre-chamber. A mathematical model was used, which is capable of estimating the radial average size distribution as well as the radial deposit distribution of each particle size for multiple size coke with a few fixed parameters. The calculated results agree well with the experimental data, which proves the reliability of both experimental study and numerical analysis.
基金This work has been supported by Cross-Century Talents Projects of Educational Ministry of China.
文摘Owing to its merits in energy savings, environmental protection and coke quality improvement, the Coke Dry Quenching (CDQ) technology is favorite in coke making industry today. In order to validate the mathematical model developed for the cooling process of real CDQ shaft, the one-seventh scale experimental setup was established. With the air as the working fluid and the coke as the packed bed, the coke and gas temperatures and the pressure drop in the cooling shaft were measured. A mathematical model based on the non-Darcian and non-thermal equilibrium model for the cooling process of the CDQ experimental shaft was presented. The computational results were compared to the experimental data. It was found that most numerical predictions were supported by the measured values.
