论文部分内容阅读
常减压装置是原油深度加工的基础,同时也是炼油企业用能大户。针对国内某企业的常减压装置,应用流程模拟软件Aspen HYSYS,建立装置的换热网络模型。以加工原油性质、初馏塔、常压塔、减压塔模拟过程参数及常减压装置对产品质量的要求作为换热网络调整的基础参数,利用Aspen Pinch软件,对装置原有换热网络进行夹点分析,根据原油常减压装置内部冷、热物流特点,分析装置用能瓶颈,得出换热网络初底原油的最高理论换热终温。按照消除原换热物流跨夹点传热、中高温位热源多次合理利用、调整换热效率偏低的设备、现有设备布置变动小、投资省的原则,对换热网络进行改造优化。通过换热流程优化调整,初底油进常压加热炉温度由原来的278℃提高到288℃;降低常压炉加热负荷及燃料消耗,可节省加热炉负荷约60×10~4kcal/h,装置能耗降低约0.7kg标油/t,折合每年创造效益约126万元。
Atmospheric vacuum unit is the basis of deep processing of crude oil, but also large oil refining companies. For a domestic enterprise atmospheric and vacuum unit, application flow simulation software Aspen HYSYS, the establishment of the device heat exchange network model. Taking the properties of crude oil processing, initial distillation column, atmospheric tower, vacuum tower simulation process parameters and the product quality requirements of atmospheric and vacuum distillation unit as the basic parameters of heat exchanger network adjustment, the original heat exchange network According to the characteristics of cold and hot flow in the atmospheric and vacuum distillation unit of crude oil, the bottleneck of energy consumption of the device is analyzed, and the maximum theoretical heat transfer final temperature of the crude oil in the heat exchange network is obtained. In accordance with the elimination of the original heat transfer logistics across the pinch-point heat transfer, heat source in the high temperature multiple rational use of multiple times, adjust the low heat transfer efficiency of the equipment, the existing equipment layout changes small, the principle of investment province, heat exchanger network optimization. By optimizing the heat exchange process, the temperature of the crude oil into atmospheric pressure furnace is increased from 278 ° C to 288 ° C. Reducing the heating load and fuel consumption of the atmospheric furnace can save about 60 × 10 ~ 4kcal / h of heating furnace load, The energy consumption of the device is reduced by about 0.7kg standard oil / t, equivalent to about 1.26 million yuan of benefits per year.