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乙烯原料成本占到乙烯生产成本的60%以上,如何根据当前各种原料的价格和收率情况进行乙烯原料的选择是1个值得研究的课题。利用APS系统建立了某炼化企业乙烯厂的模型,通过建立线性方程以及一些特殊的控制结构来真实描述整个生产过程。利用线性规划分析方法中的边际价值分析方法对运算的结果进行分析,对每种原料的经济效益进行排序,得出吨原料的加工效益列表;根据一定的限制条件,计算各种炉型选择方案的效益排序列表。通过模型计算,管输轻烃的效益最好,边际效益为3 136.73元/吨。加氢尾油的边际效益最低,为2 203.6元/吨。企业可以通过最大限度增加管输轻烃的量,调整炼油部分的生产结构,压缩加氢尾油的用量,实现原料结构的优化。通过对不同炉型选择方案的效益进行对比,选择效益最好的方案进行生产,实现炉型方案选择的优化。利用APS系统建立企业的线性规划模型能为企业原料优化和生产的决策提供重要参考依据。按照模型优化的方案安排生产能够优化原料结构,提高原料的利用率,增加企业的效益。
The cost of ethylene raw materials accounts for more than 60% of the cost of ethylene production. How to choose ethylene raw materials according to the current price and yield of various raw materials is a topic worthy of study. APS system was used to establish a refinery ethylene plant model, through the establishment of linear equations and some special control structure to truly describe the entire production process. Use the marginal value analysis method in linear programming analysis method to analyze the result of operation and sort the economic benefits of each raw material to get a list of the processing benefits of raw materials. According to certain restrictions, calculate various furnace type selection schemes The benefits of sort list. Through the model calculation, the benefit of transporting light hydrocarbons is the best, with a marginal benefit of 3 136.73 yuan / ton. The lowest marginal benefit of hydrogenated tail oil is 2 203.6 yuan / ton. Enterprises can optimize the structure of raw materials by maximizing the amount of light hydrocarbons in pipelines, adjusting the production structure of the refining sector, and compressing the amount of hydrogenated tail oil. By comparing the benefit of different furnace type selection schemes, the best scheme is selected for production, and the selection of furnace type scheme is optimized. Using APS system to establish a linear programming model for enterprises can provide an important reference for the decision-making of raw materials optimization and production. According to the model optimization program scheduling production can optimize the structure of raw materials, improve the utilization of raw materials, increase business efficiency.