冷热原油交替顺序输送优化模型研究

冷热原油交替顺序输送总能耗费用主要包括加热炉的燃料费用和输油泵的动力费用.在保证安全输油任务的前提下,如何使输油总能耗达到最小对于降低企业输油成本具有非常重要的意义.以输油总能耗最小为目标函数,建立冷热原油交替顺序输送优化模型.模型中将顺序输送分为4个时间阶段:冷油头加热非稳态阶段、冷油不加热准稳态阶段、冷油尾加热非稳态阶段和热油加热准稳态阶段.两个准稳态输送阶段采用两层嵌套法来求解,两个非稳态阶段采用两层嵌套法和满足高凝油油头(油尾)进站温度相结合的方法优选输油方案.结合工程实际给出冷热原油交替顺序输送优选算例,研究成果可为制定冷热油交替输送经济运行方案提供依据.

Optimization Model Research in Process of Batch Transportation of Cool and Hot Crude Oil

To the batch transportation of cool and hot crude oil,the total cost of transporting oil consists of fuel cost of fire furnace and power consumption cost of oil pump.It is very important to make the total consumption minimal under the premise of accomplishing safely transporting task.Taking the minimal of total energy consumption as the objective function,a batch transportation model of cool and hot crude oil pipeline was set up.The batch transportation in the model was divided into four time stages that unsteady stage of the cold oil head heated,quasi-steady-state stage of the cold oil unheated,unsteady stage of the cold oil end heated and quasi-steady-state phase of the hot oil heated.Two-layer nesting method was used to solve the quasi-steady-state stage;both two-layer nesting method and meeting the pitted in-station temperature of oil head(oil end) were used to select the optimization scheme.Combined the engineering practice,the optimization example of the batch transportation of cool and hot crude oil was given,and the research results can provide a decision-making basic for optimizing transmission of the batch transportation of cool and hot crude oil.