乙烯在丙醛体系中的气泡行为研究及乙烯氢甲酰化制丙醛鼓泡塔工程放大预测

Experiment/Simulation of Ethylene Bubble Behavior in Propionaldehyde System and the Prediction of Propionaldehyde Industrial Bubbling Reactor

研究了水-N2、丙醛-N2以及乙烯氢甲酰化反应实际工况下的气泡行为。发现在实际反应工况下,乙烯、氢气、一氧化碳三种原料气同时发生反应,气泡数量逐渐变少,无明显气泡合并及大气泡出现。通过系列假设条件,推导出气泡反应模型,并通过乙烯氢甲酰化模试连续反应进行验证,模型数据与试验数据基本吻合。采用气泡转化率模型对总进气量为13000 L/h(标准状态下)的某丙醛鼓泡塔工业装置进行预测,当有效液面高度约为7000 mm时,可满足工业装置转化率大于80%的设计目标,可为工业装置反应器的设计提供依据。

The motions of bubble in water,propanal and ethylene hydroformylation reaction liquid were measured in this paper.It was found that in hydroformylation reaction,the three raw material gases,ethylene,hydrogen,and carbon monoxide,reacted simultaneously,the number of bubbles decreased gradually,and there was no obvious bubble coalescence and enormous bubbles.At a certain condition,the bubble reaction model was deduced and validated by continuous ethylene hydroformylation pilot plant experiment.The model data were basically in agreement with the experimental data.The model was used to predict a scaled up propionaldehyde bubbling tower with total air inflow of 13000 L/h,at a suitable virtual liquid height of 7000 mm,the design target of reactor conversion rate over 80%could be achieved.The study can provide a basis for the design of industrial plant reactors.