摘要
为了降低炼油企业生产成本、实现节能降耗,必须保证氢气系统在最优的生产计划下运行。针对这一问题,本文将氢气总费用最小化作为生产计划优化目标,以某炼油厂为例,基于Petri网构建了氢系统中供氢装置和耗氢装置间的氢气匹配模型以及氢系统的费用模型,通过合理匹配供氢装置与耗氢装置的氢量得到氢气总费用最小时的生产计划。在Petri网得到的最优计划下氢系统氢气总费用为50335.0$/h,较优化前费用降低了23.4%,说明提出方法的可行性和有效性,对实际的炼油厂氢气系统优化计划具有一定的指导作用。
It is necessary to ensure that hydrogen system is nmning in optimal scheduling in order to reduce the production cost and realize energy saving and consumption reducing in refinery. So a new approach based Petri nets to optimize the scheduling of hydrogen system in refinery was proposed in this paper. A refiney was taken for the example and the object is to minimize the total cost of hydrogen. Firstly, the Petri nets model for hydrogen network was built according to the flow diagram and the logical relation among devices. Then on the basis of the hydrogen amount provided by the hydrogen supply devices and needed by the hydrogen consumption devices, the Petri nets model for matching between the hydrogen supply devices and the hydrogen consumption devices was built. Meanwhile, in accordance to with the coat functions and the mathematical definition of Petri nets, the cost models based on Petri nets for the hydrogen devices, the purification devices and the compressors were built, respectively. At last, the scheduling model with the goal of minimizing cost was built based on Petri nets by combining the process model and the cost models for hydrogen network in refinery. After the scheduling optimization, the total cost of hydrogen gained by Petri nets was 50335 ￥/h, which reduced by 23.4 %. This was a strong illustration that the proposed approach was feasible and effective, which can be a guide for optimizing the scheduling of hydrogen system in refinery.
出处
《计算机与应用化学》
CAS
CSCD
北大核心
2012年第10期1274-1280,共7页
Computers and Applied Chemistry
基金
辽宁省科学技术计划项目(2011224005)
国家杰出青年科学基金(21125628)
中国石油科技创新基金资助(2011D-5006-0401)
