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炼油企业通常由生产过程和公用工程两部分组成。将生产计划和公用工程集成优化,不仅获得了真正的全局最优解,而且克服了传统生产计划人为制定生产过程与公用工程之间中间物流(各压力等级的蒸汽、瓦斯等)价格的缺陷,避免了蒸汽减温、减压和放空,以及炼厂气放空的经济损失和环境破坏。笔者首先采用IDEF0方法建立了生产计划与公用工程的功能模型,描述了两者之间的相互关系,然后建立了生产计划与公用工程集成的多周期混合整数线性规划模型。模型描述了装置能耗不仅与加工量相关,而且与装置的生产方案相关,更真实地反映了生产过程与能量系统之间的定量关系。还对模型进行了全厂范围内各压力等级蒸汽和燃料的平衡。笔者将建立的全厂多周期优化模型应用于中国北方的某大型炼油厂,验证了模型的有效性。
Refineries usually consist of two parts: the production process and the public works. The integration of production planning and public utility optimization not only obtains the true global optimal solution but also overcomes the defect that the traditional production planning artificially formulates the price of intermediate logistics (steam, gas, etc.) between the production process and the public works, Avoided the steam temperature reduction, decompression and venting, as well as the economic loss of vent gas and environmental damage. Firstly, the author establishes the functional model of production planning and public works by IDEF0 method, describes the mutual relationship between the two and then establishes a multi-period mixed integer linear programming model integrating production planning and public engineering. The model describes that the energy consumption of the plant is not only related to the processing volume but also related to the production plan of the plant, so as to more truly reflect the quantitative relationship between the production process and the energy system. The model was also steam-fuel-balanced across all plant-wide pressure levels. The author will establish the whole plant multi-period optimization model applied to a large refinery in northern China, verify the effectiveness of the model.