多杂质氢网络全局节能优化研究

发布时间：2018-03-09 10:52

本文选题：氢网络　切入点：数学规划法　出处：《西安石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着加氢规模的不断扩大,氢气成本已成为炼油企业原料成本中仅次于原油成本的第二位成本要素。我国汽、柴油加氢工艺的综合氢耗在1.2%左右,远高于国外0.45%的综合氢耗,在用氢经济性方面与国外存在相当大的差距,在满足不断增长的用氢需求的同时降低氢气成本和消耗是炼化企业用氢系统的核心需求。本文运用数学规划法建模,对某炼厂的氢气系统进行了优化研究,通过在模型中添加提纯装置约束和网络复杂程度约束,使氢网络的数学规划分析更全面、结果简单可行,综合考虑各含氢流股氢纯度、杂质含量、压力等性质,减少了制氢装置负荷,得到氢网络的最佳供应方式,与原网络相比制氢负荷降低32.81%,氢气利用率提高7.3%,显著提高了企业的经济效益,实现资源的充分利用。本文还通过对一小型炼厂氢气系统的运行数据监测和产氢、用氢、和氢回收三个环节分析,并对氢气系统中存在的富氢资源做燃料造成浪费和制氢PSA未充分利用等问题,制定了相应的优化方案,并提出了合理的操作改进建议。计算结果表明加氢驰放气全作为制氢原料、重整氢送入PSA装置的改造方案的改造工程量小、经济性好,氢气产量可增加16.6%,有效缓解了氢供应不足的矛盾,促进了汽、柴油质量的持续改善。制氢物耗降低17.5%,实现了节能降耗增效的目的。
[Abstract]:With the continuous expansion of hydrogenation scale, hydrogen cost has become the second most important factor in the feedstock cost of oil refining enterprises after crude oil cost. The comprehensive hydrogen consumption of China's steam and diesel hydrogenation process is about 1.2%, which is much higher than that of foreign 0.45%. There is a big gap between the economy of using hydrogen and that of foreign countries. It is the core requirement of hydrogen system for refinery enterprises to reduce the cost and consumption of hydrogen while satisfying the increasing demand of hydrogen. In this paper, the mathematical programming method is used to model the system. The optimization of hydrogen system in a refinery is studied. By adding purification device constraints and network complexity constraints to the model, the mathematical planning and analysis of hydrogen network are more comprehensive, the results are simple and feasible, and the hydrogen purity of each hydrogen stream is considered synthetically. Because of impurity content and pressure, the load of hydrogen production unit is reduced, and the optimum supply mode of hydrogen network is obtained. Compared with the original network, the hydrogen production load is reduced by 32.81%, the hydrogen utilization ratio is increased by 7.3%, and the economic benefit of the enterprise is improved significantly. To realize the full utilization of resources. This paper also analyzes the operation data of a small refinery hydrogen system and hydrogen production, hydrogen recovery and hydrogen recovery. The problems such as waste caused by hydrogen rich resources and insufficient utilization of hydrogen PSA in hydrogen production system are also discussed, and the corresponding optimization scheme is worked out. The calculation results show that hydrogenation gas is used as raw material for hydrogen production, and the revamping scheme of reforming hydrogen into PSA unit is of small quantity and good economy. The hydrogen production can be increased by 16.6b, which effectively alleviates the contradiction of the shortage of hydrogen supply, promotes the continuous improvement of the quality of steam and diesel oil, reduces the hydrogen production consumption by 17.5and achieves the purpose of saving energy, reducing consumption and increasing efficiency.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE624;TQ116.2

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