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国内的丙烯腈装置大多采用丙烯氨氧化工艺,由于该工艺过程循环较多,组分之间的交互作用较强,凭经验难以确定各操作参数对丙烯腈回收率及产品质量的综合影响。应用Aspen Plus软件建立丙烯腈装置回收及精制单元流程模拟模型,包括急冷塔系统、吸收塔系统、回收塔系统、乙腈塔系统、脱氰塔系统和成品塔系统,模型计算值与实际值非常吻合。通过模型对装置运行状况进行分析,在平衡装置能耗和产品经济效益的基础上,判断装置是否处于优化状态下运行,寻找装置能耗和产品之间的操作平衡点,确定装置各系统最优化的操作参数。通过对中石化两套丙烯腈装置进行模拟与优化,方案实施后,每年共实现挖潜增效390.56万元,在降低装置能耗和提升装置经济效益的同时,也提高了丙烯腈装置的精细化操作水平和管理水平。
Most domestic acrylonitrile plant adopts ammoxidation process of acrylonitrile. Due to the cycle of the process is relatively large and the interaction between the components is strong, it is difficult to determine the comprehensive influence of each operating parameter on the recovery of acrylonitrile and product quality by experience. Aspen Plus software was used to establish simulation model of unit recovery and refinement of acrylonitrile plant, including quench tower system, absorption tower system, recovery tower system, acetonitrile tower system, de-cyanogen tower system and finished tower system. The calculated values are in good agreement with the actual values . Through the analysis of plant operating conditions, we can determine whether the plant is operating under optimal conditions based on the energy consumption of the plant and the economic benefits of the plant, look for the energy consumption of the plant and the operational balance between the plants, and determine the optimum of each system of the plant Operating parameters. Through the simulation and optimization of two sets of acrylonitrile units in Sinopec, after the implementation of the plan, a total of 3,905,600 Yuan of tapping potential and efficiency has been realized each year. While reducing the energy consumption of the plant and increasing the economic benefits of the plant, the refinement of the plant of acrylonitrile is also improved Level and management level.