论文部分内容阅读
石油馏分的恩氏蒸馏、实沸点蒸馏和平衡汽化曲线是石油加工工艺计算必不可少的基础数据,也是制定原油加工方案、炼油厂调整和控制生产的根据。本文将1.33 kPa绝压下的恩氏蒸馏曲线和实沸点蒸馏曲线分别与平衡汽化曲线的换算图表回归,开发出了1套便于应用的新换算模型。该模型可为计算各种油品物性、相平衡关系以及进行原油评价等提供基础数据,有助于提高设计和控制精度。新模型采用拟多项式的非线性函数,可以直接进行双向计算,稳定性高。恩氏蒸馏和实沸点蒸馏与平衡汽化曲线的50%馏出点换算模型的最大相对误差分别为1.02%和1.03%。用2个体系的实测数据验证该模型,体系1新模型的最大相对误差为0.37%,文献模型为4.50%,体系2新模型的最大相对误差为1.37%,文献模型为1.53%。结果表明新模型与实测数据吻合较好,计算精度优于文献模型。
The oil distillate’s Enzine distillation, solid boiling point distillation and equilibrium vaporization curve are the basic data necessary for the calculation of petroleum processing technology. It is also the basis for formulating the crude oil processing scheme and the refinery adjustment and control of production. In this paper, the Engels’ distillation curve and the boiling point distillation curve at absolute pressure of 1.33 kPa are respectively regressed with the conversion diagram of the equilibrium vaporization curve, and a set of new conversion models are developed which are convenient for application. The model can provide basic data for calculating the properties of various oils, the phase equilibrium relationship and the evaluation of crude oil, which helps to improve the design and control accuracy. The new model uses the non-linear function of quasi-polynomial, which can be directly bi-directional calculation and has high stability. The maximum relative errors of the 50% distillate point conversion model of Engels distillation, solid boiling point distillation and equilibrium vaporization curve were 1.02% and 1.03%, respectively. The maximum relative error of the new model is 0.37% and the literature model is 4.50%. The maximum relative error of the new model is 1.37% and the literature model is 1.53%. The results show that the new model is in good agreement with the measured data, and the calculation accuracy is better than the literature model.