关键词: 石油, 蒸馏, 模拟, 整体优化

Abstract:

Atmospheric and vacuum equipment is an important part of refining and chemical enterprises. With the development of science and technology, more and more enterprises have begun to use the sideline of primary distillation towers to increase the production of aviation coal. A refinery chemical company’s 3^# atmospheric and vacuum unit has processed mixed crude oil at 8.0Mt/a. The process simulation and operation optimization of the unit are performed through Aspen Plus. The optimal extraction position of the side line of the initial distillation column is determined to be the 22nd tray. The extraction volume is 16t/h, and the best heat extraction ratio of atmospheric tower is the top of the tower + top cycle∶one middle∶two middle=0.387∶0.233∶0.380. The result not only will increase the heat extraction rate of 8.11GJ/h in Changzhong, providing favorable conditions for subsequent optimization of the heat exchange network, but also increase the production of aviation coal by 16t/h on the basis of ensuring the quality of each sideline product, and the extraction of the atmospheric tower. The output rate has also increased from 35.5% to 36.3%. It shows that based on the optimization of heat extraction in the middle section of the atmospheric tower, the effect of increasing the output of jet coal by using the sideline of the initial distillation tower is obvious, and the extraction rate of the atmospheric tower will also rise. And with the rapid development of Chinese aerospace industry, the market demand for aviation coal is on the rise. Therefore, it has great practical significance for the use of the side line of the primary distillation column.

Key words: petroleum, distillation, simulation, global optimization