Simulation and Optimization of Continuous Rectification Process for Polyoxymethylene Waste Liquid
Proposes a three-tower refining process for the recovery of polyformaldehyde organic waste liquid,based on its composition and characteristics.The process was simulated and optimized using software to minimize total area content(TAC).The optimal conditions were determined as follows:The theoretical plate number for the methyl formate distillation tower was 54,the reflux ratio was 3.002,the feed position was 45,the water consumption ratio of the extractant in the water washing tower was 0.5,the reflux ratio was 1.0253,the theoretical plate number was 18,the feed position was 16,and the extractant feed plate position was 6.The de-methanolization tower had a reflux ratio of 4.1,a plate number of 50,and a feed plate position of 43,with a minimum TAC of 3.02×106 ¥/y.By employing heat pump technology to enhance the de-methanolization tower process,the energy consumption of the reboiler decreased by 38.1%,and the TAC decreased by 8.75×105 ¥/y.The research provides a valuable reference for the design of continuous distillation recovery processes for polyformaldehyde waste liquid.
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