催化裂化装置反应再生系统操作参数优化

发布时间：2018-01-16 11:20

本文关键词：催化裂化装置反应再生系统操作参数优化　出处：《大连理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：作为液化气、汽油、柴油等气体和轻质油产品的主要生产装置,催化裂化在炼厂中的地位举足轻重,当今社会环境问题突出、燃料油产品亟待升级、高品质汽柴油的需求日益增加,这就对催化裂化装置提出更高要求。如何优化催化装置反应-再生系统操作参数、增加轻质油收率、提高产品质量、最大化经济效益,成为热门研究课题。本文以21集总动力学模型为基础,探究流化床催化裂化反应的内在机理,旨在准确预测产品分布,优化操作参数,提高产品液收和经济效益。针对某石化65万吨／年催化裂化装置,使用HYSYS模拟软件中FCC模型对装置进行模拟,并使用进料和产品数据校准集总模型参数,结果在误差允许范围之内。首先,对常规催化裂化,以产品液收和经济效益为目标函数,分别对反应-再生系统中,反应温度、进料预热温度、反应压力、反应时间和回炼比等独立变量进行单变量灵敏度分析,考察其对剂油比、转化率、产品分布和产品性质的影响,得到每个独立变量的最佳操作条件。其次,论文研究了冷再生催化剂循环催化裂化工艺,由于采用再生剂外取热技术,使再生剂温度不受再生器烧焦效果限制,变得独立可调,成功解决反应温度、进料预热温度、再生剂温度和剂油比等参数相互耦合的问题,将影响提升管反应器反应的本质参数概况为反应温度、剂油比、反应时间和反应压力,保持其他参数不变,对反应温度和剂油比进行灵敏度分析。研究发现,与常规催化裂化不同,当剂油比变化时,最佳反应温度不变,反之亦然,即反应温度和剂油比对反应的影响是相互独立的,可以分别进行优化。进一步,使用Optimizer优化器同时进行多变量优化,发现无回炼时,应采用较大的剂油比、较低的反应时间、适中的反应温度的操作条件；有回炼情况下,应采用大回炼比,低剂油比,以及较低的反应温度,以提高柴油收率和液收。无论是常规催化裂化还是冷再生催化剂循环催化裂化工艺,优化后,液收和经济效益均大幅提高,对于现场操作,有一定指导意义。
[Abstract]:As the liquefied gas, gasoline, diesel oil and gas producing device and light oil products, played an important role in catalytic cracking refinery in today's society, environment problems, the urgent need to upgrade the fuel oil products, high-quality gasoline and diesel oil demand is increasing, the catalytic cracking device is put forward higher request. How to optimize the catalytic reaction device the system operating parameters of regeneration, increase the yield of light oil, improve product quality, to maximize the economic benefits, has become a hot research topic. This paper is based on the 21 lumped kinetic model, to explore the intrinsic mechanism of fluid catalytic cracking reaction, to predict the product distribution, optimizing operation parameters, improve product liquid yield and economic benefits. For a petrochemical 650 thousand tons / year catalytic cracking unit, using HYSYS device simulation software simulation in FCC model, and use the feed and product data calibration lumped model, Results in the allowable error range. Firstly, the conventional catalytic cracking, the product liquid yield and economic benefit as the objective function, respectively. The reaction temperature reaction regeneration system, feeding, preheating temperature, reaction pressure, reaction time and recycle ratio as independent variables for single variable sensitivity analysis, to study the oil agent ratio, conversion rate, influence product distribution and properties, each independent variable optimal operating conditions. Secondly, the research of cold regeneration catalyst catalytic cracking process, due to thermal technology uses the regeneration agent, the agent is not affected by the temperature of coke burning effect, become independent and adjustable, successfully solve the reaction the feed temperature, preheating temperature, regeneration temperature and catalyst / oil ratio and other parameters of the mutual coupling problem will affect the nature of the reactor parameters enhance the reaction to the reaction temperature, catalyst oil ratio, reaction time and reaction Pressure, keeping the other parameters unchanged, the reaction temperature and the ratio of catalyst to oil sensitivity analysis. The study found that different from the conventional catalytic cracking, when the ratio of catalyst to oil changes, the optimal reaction temperature constant, and vice versa, the effects of reaction temperature and catalyst to oil ratio on the reaction is independent of each other, can be separately optimized further. At the same time, using the Optimizer optimizer multi variable optimization, found no recycle, should be larger than the solvent to oil ratio, reaction time, low reaction temperature, moderate operating conditions; a recycling situation, the recycle ratio, low solvent oil ratio, and low reaction temperature, to increase the yield of diesel oil and liquid yield. Both conventional catalytic cracking or cold regeneration catalyst catalytic cracking process, after optimization, the liquid yield and economic benefit are improved greatly, for on-site operation, has a certain significance.

【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE966

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