Energy Saving Technology And Energy Use Analysis Of Butadiene Plants

Based on the study of acetonitrile butadiene extraction unit, the process simulation technology was used to explore means of energy-saving way. Also with the uses of systems analysis and pinch analysis methods, measures to optimize the energy consumption are proposed.(1) Using the ASPEN software function of the unit operation simulation and model analysis, the energy saving measures are proposed, such as setting a solvent ratio down to 6.6, washing slope of washing tower down to 0.85, decreasing the pressure of deheavy tower. Using ASPEN software, mixed C4 alkyne selective hydrogenation technology was simulated. After hydrogenation, alkynes content was decreased to 14.8 × 10-6 (mass), to meet the product requirements of the alkyne content. The second extraction distillation tower could be cancelled in the process design, and the implementation process was simplified, also the energy was saved. But the technology to further improve the selective hydrogenation of butadiene hydrogenation process to reduce losses and to reduce the catalyst cost has yet to be improved.(2) With the means of steam power system energy analysis, the unreasonable use of apparatus middle pressure steam and pump selection exist; optimization measures of replacing partial middle pressure steam with low pressure steam and lowering pump head replacement Low-voltage motors are proposed. So the comprehensive energy consumption per ton of product was lowered from 248 kg to 244 kg of standard oil standard oil drops.(3) Using pinch analysis method to analyze plants heat recovery network, the pinch point temperature is 87.4℃, and the minimum heating utilities consumption amount is 24643.98kW. The minimum cooling utilities consumption amount is 34928.18kW, and the utilization rate of waste solvent heat is 94.4%. The overall energy consumption of the device is reasonable.