Abstract:

According to the characteristics of the energy use of the crude oil distillation unit, the heat integration scheme of the crude oil distillation unit was analyzed and evaluated with the help of the pinch analysis method, Using the proposed thermal integration effective value evaluation index, this paper explored the optimization strategy for heat integration of the crude oil distillation unit based on pinch point analysis, and studied the application of this method in different heat integration schemes such as heat integration below the pinch point, across the pinch point and above the pinch point. The proposed method could be used to determine whether the heat integration scheme of crude oil distillation units was effective, and effectively guided the heat integration between crude distillation units in refining enterprises. The cases study showed that the effective value of heat integration was only 7% in the high temperature hot water heat integration scheme cross pinch point. The effective values of heat integration for the catalytic slurry A and B heat integration scheme above the pinch point, where the slurry A and B had same initial and target temperature and different heat, were 100% and 60%, reducing the thermal utility load of the plant by about 25% and 30%, respectively.

Key words: crude oil distillation unit, heat integration, pinch analysis, optimization

摘要：

根据原油常减压蒸馏装置用能特点，本文利用夹点分析方法对原油常减压蒸馏装置热集成方案进行分析评价，借助提出的热集成有效值评价指数，探讨基于夹点分析的常减压装置热集成优化策略，并研究该指标在夹点之下热集成、跨夹点热集成及夹点之上热集成等不同的热集成方案中的应用，所提出方法可用于判断常减压装置热集成方案是否切实有效，能够有效指导炼油企业常减压装置间的热集成。案例研究表明，跨夹点高温热水热集成方案中，热集成有效值仅为7%；夹点之上相同温度，不同热量催化油浆A与催化油浆B热集成方案中，热集成有效值分别为100%与60%，分别降低了装置热公用工程负荷约25%与30%。

关键词: 原油常减压蒸馏装置, 热集成, 夹点分析, 优化