Numerical simulation of pulverized coal-gas combined combustion in coke oven combustion chamber
QIU Hao1, ZHANG Xue-hong2, LIU He-ping3
1. State Key Laboratory of Advanced Steel Processes and Products, Central Iron and Steel Research Institute, Beijing 100081, China; 2. Central Research Institute (Wuhan), Baosteel, Wuhan 430080, Hubei, China; 3. Material Digtal Research and Development Center, China Iron and Steel Research Institute Group Beijing 100081, China
Abstract:In order to simplify resource utilization process of pulverized coal in coking plant and improve temperature uniformity of coke oven combustion chamber wall, a new pulverized coal-gas combined combustion technology was developed. The effects of air-fuel ratio and coal injection position on temperature characteristics and wall temperature distribution of JN60 coke oven combustion chamber were investigated by numerical simulation. The results show that when air-fuel ratio is 1.2∶1.0, pulverized coal injection in the middle of combustion chamber will reduce temperature and increase vertical temperature difference of chamber wall. Under pulverized coal injection condition, increasing air-fuel ratio can effectively improve the average temperature of chamber wall. When pulverized coal is injected at the bottom of combustion chamber, it can delay gas combustion and improve vertical temperature uniformity of chamber wall.
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