摘要
为了改善激冷室的降温效果 ,文中提出了一种改进结构———在激冷室的中心部位增加中间激冷器 ,并且对该方案进行数学模拟 ,计算采用K ε湍流模型和四通量辐射模型 ,并把有中间激冷器的气化炉激冷室下降管的计算结果与在役结构激冷管的计算结果进行比较来考查新方案的效果。计算表明带有中间激冷器的气化炉激冷室下降管的传热降温效果和流场特性优于在役结构激冷室下降管。
In order to enhance the heat transfer process in quench chamber of coal gasifier, a modified structure was presented, that was, at the center of the modified quench chamber, a pipe with smaller diameter was set up and cooling water flows through it and then flows down around its outer surface. In order to predict the heat transfer capability of the new structure, numerical simulation was carried out to simulate the flow and heat transfer processes of both the modified and on-line quench chambers. K-ε turbulence model was employed in the simulation. The simulation results showed that the heat transfer capability of the retrofitted quench chamber was greater than that of the on-line one.
出处
《化学工程》
CAS
CSCD
北大核心
2003年第6期22-25,共4页
Chemical Engineering(China)
关键词
气化炉
激冷室
下降管
数值模拟
湍流
传热
辐射
coal gasifier
quench chamber
downcomer
numerical simulation
turbulence
heat transfer
radiation
