用能源网络图分析石化项目节能技术的先进性

Energy network diagram applied to evaluate a petrochemical project on energy-saving technology

石化项目的能源消耗量很大,在项目前期对其进行科学的节能评估有利于从源头提高能源的利用率。能源网络图作为国家或地区能源统计数据分析的有效工具,在石化项目的节能评估中未曾应用。本文针对石化项目的用能特点,基于能量平衡的原理建立了石化项目的能源网络图,详细阐述了网络图在能量利用各环节中的建立原则、能量平衡方法和计算结果。结果表明,能源网络图能够直观地展示整个项目的能量流动全貌,并揭示各环节的能源利用效率和水平,是评价项目节能技术先进性的有效方法。运用此方法计算出该项目能最利用率为67.72%,表明其整体用能水平达到了先进国家水准。

Large amount of energy is consumed in a petrochemical project. Action should be done to evaluate its effectiveness on energy-saving measures for improving the efficiency during the front-end stage of the project. Energy network diagram, which is taken as a tool for sorting and displaying energy statistical data of a country or a district, is never used to evaluate the energy-saving measures of a petrochemical project by now. According to the characteristics of a petrochemical project, the tool was adopted and the diagram was depicted in this paper based on the energy conservation law. The principles, methods and results were presented and demonstrated in detail, which covered the four parts of energy utilization. The results showed that the diagram was a useful tool for evaluating the effectiveness of energy-saving measures applied in the petrochemical project. It not only illustrated a whole picture of the energy flow process apparently, but also revealed their utilization efficiency systematically. The total energy efficiency of the project calculated using this method was 67.72%, which ranked the project in an advanced and high level on energy consumption.