费托合成油各馏分切割过程的计算机模拟

发布时间：2018-03-04 13:21

  本文选题：费托油　切入点：蒸馏　出处：《北京化工大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着世界石油资源的短缺和环保要求不断地提高,由煤、天然气经费托合成技术合成液体燃料已成为业内关注的焦点。费托合成油最大的优点是无硫、无氮,属于清洁燃料,符合日益严格的环境法规要求。由于费托合成过程的多样性和复杂性,许多国家仍在投入大量资金进行关于费托合成的研究,而在关于分离费托油的技术方面的研究较少。许多费托合成油产品的特性仍不被研究者所知。本文首先对费托合成油的样品进行了理化性能的测定研究,并在此研究基础上,应用Aspen Plus这一大型化工流程模拟软件,对费托合成油的分离切割过程进行了蒸馏模拟。分别针对不同的切割要求和产品要求,对比并选取了适合的蒸馏工艺流程。分别对费托油的二级常减压蒸馏、三级常减压蒸馏、二级常压蒸馏和三级常压蒸馏分离工艺流程进行了模拟,得到了温度压力、各项流量、能耗、产品蒸馏馏程、分离质量等重要参数,分析了塔板的温度、气液相负荷的分布规律。对于针对石油助剂分离的二级常压蒸馏,进行了灵敏度分析,得到了常压加热炉温度高低对各产品物流大小的影响。并依据所得数据,对常压加热炉温度这一能耗关键因素的变化进行经济分析,找出了在保证产品质量的前提下,常压加热炉的最优操作温度。结果表明,对于费托油处理量300kt/y的常减压常规切割过程,加了初馏塔的三级常减压蒸馏工艺优于二级常减压蒸馏工艺。而针对油田助剂进行分离时,产品分离质量随常压炉温度升高而增强,310℃的常压炉温为符合产品分离质量要求的前提下,使总收益最大的最佳温度,此时每吨费托油收益为1899元。对于费托油处理量10kt/y的中试装置,三个简单塔串联的工艺流程合理、分离效果较好。
[Abstract]:With the shortage of petroleum resources in the world and the increasing requirement of environmental protection, the synthesis of liquid fuel from coal and natural gas has become the focus of attention in the industry. The biggest advantage of Fischer synthetic oil is that it has no sulfur, no nitrogen, and belongs to clean fuel. Meeting increasingly stringent environmental regulatory requirements. Owing to the diversity and complexity of the Fischer synthesis process, many countries are still investing heavily in research on Fischer synthesis, However, there are few studies on the separation technology of Fischer oil. Many of the properties of Fischer synthetic oil products are still unknown to the researchers. In this paper, the physical and chemical properties of the samples of Fischer synthetic oil are studied, and on the basis of these studies, The separation and cutting process of Fischer synthetic oil has been simulated by distillation with Aspen Plus, which is a large-scale chemical process simulation software. By comparing and selecting the suitable distillation process, the separation processes of two stage atmospheric and vacuum distillation, three stage atmospheric and vacuum distillation, two stage normal pressure distillation and three stage normal pressure distillation of Fischer oil were simulated, and the temperature, pressure and flow rate were obtained. Some important parameters, such as energy consumption, distillation range, separation quality and so on, are analyzed. The temperature of the tray and the distribution of gas-liquid load are analyzed. The sensitivity analysis of the secondary atmospheric distillation for the separation of petroleum auxiliaries is carried out. The influence of the temperature of the atmospheric heating furnace on the logistics of each product is obtained. According to the data, the change of the temperature of the atmospheric heating furnace as a key factor of energy consumption is analyzed economically, and the premise of ensuring the quality of the product is found out. The optimum operating temperature of atmospheric heating furnace. The results show that for the normal cutting process of 300kt / y of Fett oil, The three-stage atmospheric and vacuum distillation process with primary distillation column is superior to the second-order atmospheric and vacuum distillation process. The product separation quality increases with the increase of atmospheric pressure furnace temperature and the atmospheric pressure furnace temperature of 310 鈩，

本文编号：1565809