摘要
乙炔二聚反应制备乙烯基乙炔是氯丁橡胶生产等工艺中的重要操作单元,通常在全混式鼓泡塔反应器中进行。但塔内流体混合模式单一、流场对称性强、液相轴向返混较高,乙烯基乙炔容易滞留在催化剂中,并与乙炔进一步反应生成二乙烯基乙炔和高聚物。强化乙炔二聚鼓泡塔内的反应,提高乙炔单程转化率和选择性,有助于氯丁橡胶生产实现节能减排。应用FLUENT软件模拟,计算了鼓泡塔内流场结构及变化规律,发现斜插穿流式挡板可有效地调控乙炔二聚鼓泡塔内流场结构,减小漩涡尺寸,降低液相湍流流速,减小液相返混区域,强化鼓泡塔内乙炔二聚反应。
Acetylene dimerization for preparation neoprene, which is usually operated in a full mixed mode, symmetric flow field structure, serious liquid of monovinyl-acetylene is the key process for production of bubble column reactor. But it has disadvantages of single mixing axial back mixing, and long residue time for monovinyl-acetylene in the catalyst leads to further reaction with acetylene, which results in formation of the divinyl-acetylene and byproduct polymers. Increasing conversion rate and selectivity contributes to energy saving and consumption reduction by the enhancement of bubble column reaction. The FLUENT software was used to simulate the flow field in the bubble column reactor. It shows that the tilted porous baffle can change the flow field structure effectively, reduce the vortex size. It can also reduce liquid back-mixing area and the turbulence intensity in the whole bubble column reactor, which can enhance the dimerization reaction of acetylene.
出处
《化学工程》
CAS
CSCD
北大核心
2013年第2期51-55,共5页
Chemical Engineering(China)
基金
国家重点基础研究发展"973"计划资助项目(2012CDA01203)
中央直属高校基本科研业务资助项目(CDJZR10220001)
教育部新世纪优秀人才支持计划项目(NCET-0552)
关键词
乙炔二聚
鼓泡塔
湍流强度
漩涡尺寸
湍流
acetylene dimerization
bubble column reactor
turbulent intensity
vortex size
back mixing
