摘要
含能化合物的制备因反应条件苛刻、放热剧烈、易失控而对反应釜传热性能有较高的要求。设计强放热反应釜盘管时,通过减小管间隙和降低安装高度可以增大釜内传热面积,但会阻碍釜内物料的流动,对物料的整体循环不利。今结合某800 L强放热反应釜的设计,利用计算流体力学软件FLUENT对盘管排布较密集,且物料不能浸没全部盘管的工艺条件进行了数值模拟,采用多重参考系法(MRF)和标准k-ε湍流模型考察了盘管管间隙和离底高度对釜内流动情况的影响。结果表明,对所研究的800 L反应釜,在物料不能浸没全部盘管的工况下,管间隙大于等于10 mm,离底高度大于等于75 mm时,盘管空间排布的变化对釜内流动状况的影响较小。根据本研究结果设计的800 L反应釜已用于某强放热反应的生产,运转状况良好。
Excellent heat transfer performance for the tank reactors used for the synthesis of energetic compounds is highly demanded due to strongly exothermic, easily runaway and strict reaction conditions. The heat transfer area of coils can be increased by decreasing the coil clearance and lowering the fixed height. However, it also results in poor mixing of reactants in tank reactors. Flow performance of a homogeneous system in an 800 L exothermic tank reactor with an intensively arranged coil which cannot be fully immerged was simulated by the computational fluid dynamics software FLUENT. Multiple reference frame （MRF） method and standard k-e turbulence model were used to study the influence of the spatial arrangement of coil on the flow field in the tank reactor. It was found that there＇s no evident effect on the flow performance of the reactants in the entitled tank reactor when the coil clearance is larger than or equal to 10 mm and the fixed height is higher than or equal to 75 mm. The tank reactor designed based on the simulation results has been successfully applied to industrial production.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2015年第1期27-34,共8页
Journal of Chemical Engineering of Chinese Universities
基金
国家自然科学基金项目(21376207)
浙江省重点科技创新团队(2010R50017)
关键词
盘管
管间隙
离底高度
强放热反应釜
数值模拟
优化设计
coil
coil clearance
fixed height
strongly exothermic tank reactor
numerical simulation
design optimization
