Computer optimization and dynamic simulations for the NO.1 polymer distillation column in polyvinyl alcohol production

LI QunSheng1;ZHAO YanLe1;ZHANG DeZhi1;WANG BaoHua2

Journal of Beijing University of Chemical Technology ›› 2012, Vol. 39 ›› Issue (4) : 31-35.

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Journal of Beijing University of Chemical Technology ›› 2012, Vol. 39 ›› Issue (4) : 31-35.
化学与化学工程

Computer optimization and dynamic simulations for the NO.1 polymer distillation column in polyvinyl alcohol production

  • LI QunSheng1;ZHAO YanLe1;ZHANG DeZhi1;WANG BaoHua2
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Abstract

Using chemical process simulation software, the behavior in polymerization section Tower I in polyvinyl alcohol production has been simulated. Though steady-state sensitivity analysis, the operating point of the Tower I was optimized as follows: the location of the feed tray was 40, the reflux ratio was 0.7 and the distillate amount was 6650 kg/h. On this basis, the tower system dynamics simulation was conducted. The results showed that the feed rate, feed composition and return flow step disturbance all had a great impact on the operation. The flow rate and the composition at the top responded slowly and the volatility persisted for 7 h. Vinyl acetate content of the reboiler product peak fluctuated during disturbance for 2-3 h. It was found that simply increasing the return flow to a tower cannot improve the separation efficiency for bottom flow as the main product. In addition, cascade control by changing the blown amount of methanol can quickly and effectively control the vinyl acetate content of the reboiler product. 

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LI QunSheng1;ZHAO YanLe1;ZHANG DeZhi1;WANG BaoHua2. Computer optimization and dynamic simulations for the NO.1 polymer distillation column in polyvinyl alcohol production[J]. Journal of Beijing University of Chemical Technology, 2012, 39(4): 31-35

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