空气分离装置氧气及氮气产品的能耗折标系数计算

Standard Energy Consumption Coefficient Calculation of Oxygen and Nitrogen Products in Air Separation Unit

氧气及氮气均为石油化工等化工过程装置运行的必需气体,其能耗折标系数数值大小直接影响气体使用装置的综合能耗水平的计算及评估。本文应用热力学的混合物最小分离功基本原理,通过热力学等相关计算得到从空气中分离获得氧气和氮气的最小分离功,并根据其最小分离功差别以确定氧气和氮气产品的能耗分摊系数,最后计算得到空气分离工艺过程的氧气产品和氮气产品的能耗折标系数。综合分析了氧氮回收率等计算参数对气体能耗分摊系数的影响,并以实例进行了说明,表明氧气氮气能耗分摊系数计算方法合理可行。

Oxygen and nitrogen are the necessary gases for the operation of chemical process equipment in petrochemical industry. The standard energy consumption coefficient directly affects the calculation and evaluation of the comprehensive energy consumption level of the gas using unit. This paper uses the basic principle of the mixture minimum separation work of thermodynamics to get the minimum separation work of separating oxygen and nitrogen from air by thermodynamics calculation and other related calculations, and the energy consumption sharing coefficient of oxygen and nitrogen products is determined according to the minimum separation power difference. The standard energy consumption coefficient of oxygen product and nitrogen product during the air separation process is calculated. This paper comprehensively analyzes the influence of calculation parameters such as oxygen and nitrogen recovery rate on the gas energy consumption sharing coefficient, and the calculation example is illustrated. It shows that the calculation method of oxygen and nitrogen energy consumption sharing coefficient is reasonable and feasible.