中文摘要：

石化工业中,联系上下游装置的物流一般都是在上游装置被冷却至一个较低温度,又在下游装置被加热到工艺要求的温度,重复的冷却升温造成了很大的能量损失。考虑装置之间的热进出料能有效的避免能量的损失,但是不适当的热出料温度不仅不能达到节能的效果,只会增加操作的复杂性,甚至还会造成热公用工程的增加。本文通过分析上下游装置的温焓图,结合夹点技术与数学规划法,研究不影响上游装置公用工程的情况下,工艺装置间单股热进出料的最高温度,并建立相应的数学模型,以原油蒸馏装置与柴油加氢装置的热进出料为例进行研究,结果表明上下游装置总公用工程量显著降低,增加了能量回收利用效率。

英文摘要：

The process stream,connecting the up-plant and down-plant in petrochemical industry,is always cooled to a low temperature at the up-plant,and heated to a required temperature at the down-plant,while repeated cooling and heating processes lead to great energy loss.Energy loss can be effectively avoided with the direct hot discharge/feed between plants.However,inappropriate temperature of hot discharge/feed not only fails to save energy,but also makes the operation complex,even results in increasing hot utilities.T-Q diagram is used to analyze the direct hot discharge/feed between the up-plant and down-plant in this study.Combining with pinch technology as well as mathematical programming is proposed to formulate a model.A crude distillation plant（CDP） and a diesel hydrotreating plant（DHP） are employed to demonstrate the method.The result indicates that it effectively decreases the total hot utility of the up-plant and down-plant and increases energy efficiency.