Improvement And Process Optimization Of Separation System For Production Of1800t/a Peach Aldehyde

In order to meet with the production targets of1800t/a, the production technology andequipments of500t/a peach aldehyde for a certain chemical enterprises in Anhui provincewere improved and designed in this paper. The continuous separation process was simulated.The reflux ratio, the number of theoretical plate and other parameters during the separationsection were optimized and designed. Combine with pinch technology theory, the heatexchange network of separation system for peach aldehyde was optimized and designed.The main contents were listed as follows:The synthesis equipment was changed to three parallel reaction kettle from the singlekettle. Intermittent separation device would be replaced by continuous separation device ofthree kettle for separation section. Continuous and efficiency was achieved in the peachaldehyde production process. The production capacity was improve. Purity of peachaldehyde products was reached more than98.8%The Aspen Plus simulation software was applied to simulate the separation process ofpeach aldehyde and to study the foundation data of peach aldehyde separation process; Thesensitivity analysis modules of simulation software was used to optimize theoretical platenumber of three tower, reflux ratio and feed plate of continuous separation section for thepeach aldehyde production process. According to the optimization, the theoretical platenumber were12,16and17, reflux ratio were0.3,0.6and0.5, the feed position were thefifth piece, eighth piece and ninth piece of theoretical plate respectively. Due to theoptimization, the separation effect was so good that the purity of the peach aldehyde was toarrival at99.2%. The operation cost of the production process was reduced effectively;Combine with the design software, the heat exchanger network of the separation systemof peach aldehyde was analyzed and optimized according to pinch technology. Under thecalculation, the pinch point temperature was156.5℃, pinch temperature difference was13℃. The energy saving potential of heating resource was40.68%and energy savingpotential of cooling resource was16.67%. The demand for utility and the total investmentcost of peach aldehyde separation process were reduced by a small amount of equipmentinvestment cost increasing.