【作者】 商丛丛；

【导师】 肖家治； 王兰娟；

【作者基本信息】 中国石油大学 ， 化学工程与技术， 2011， 硕士

【摘要】 焦化原料的性质及反应温度和反应时间是影响重油热反应产品分布的主要因素,提出采用中段循环油作为替代塔底重循环油,作为焦化循环油品成为提高炼厂效益的良好选择。论文期间采集了现场装置的典型减压渣油、中段回流油和塔底循环油,进行了不同循环比模拟辐射进料的复配以及不同原料的馏分分布等常规物性测定。利用静态实验装置重油热加工性能评价仪,开发了定温条件、定热条件、同反应历程及不同循环油配比评价实验,为重油热反应产品分布规律的研究奠定了基础。并完成了减压渣油掺炼塔底循环油和中段回流油复配比分布在0.1、0.2、0.3条件下九个模拟焦化原料的产品分布测定,得到了产品分布变化规律。此外,研究了将不同循环比模拟辐射进料的实测产品分布关联到以减压渣油为基准的产品分布的计算方法。实验结果表明:在各评价实验条件下,减压渣油掺炼中段回流油与掺炼塔底循环油相比,循环比分别为0.1、0.2、0.3时,焦炭产率下降的平均值分别为2.1%、5.2%、7.8%;液体收率升高的平均值分别为4.3%、7.3%、10.3%;气体收率下降的平均值分别为1%、2.1%、2. 5%。减压渣油掺炼中段回流油的产品分布好,能够到达增加液收、降低焦炭的目的。实验研究了同种反应油样的条件下,同时考察反应温度和反应时间对产品分布的影响。实验结果表明:油样在先高温后低温下的反应,高温段对产品分布的影响较大,低温段对产品分布的影响较小;反应温度对产品分布的影响较大,反应时间对产品分布的影响稍小。其中较高的高温段温度和较长的反应时间,是取得较好产品分布的最佳条件。更多还原

【Abstract】 The thermal reaction product distribution of heavy oil is mainly affected by raw material’s properties, reaction temperature and reaction time. A method that mid-reflux oil replaces bottom heavy-cycle oil as coking cycle oil is introducted which can enhance refinery benefit. During the paper typical vacuum residue, the mid-reflux oil and bottom heavy-cycle oil were collected. Analog radiation feed of different recycle ratio were made, and the different raw material’s boiling range were measured. The constant temperature experiment, the constant heat experiment, the same reaction process experiment different recycle ratio experiment were developed with the heavy oil thermal process unit. It is the research foundation of the thermal reaction product distribution. At the condition of recycle ratio 0.1, 0.2, 0.3, the product distribution experiment of vacuum residue oil blending with mid-reflux oil and bottom heavy-cycle oil were completed, and the variation law of product distribution was obtained. In addition, a design procedure was get which can transform the product yield.The results show that: At the different experimental conditions, compared to the vacuum residue oil blending with bottom heavy-cycle oil, the mid-reflux oil can get a better product distribution. At the recycle ratio of 0.1,0.2,0.3, the average yield of coke were declined by 2.1%, 5.2%, 7.8%; average yield of liquid were increased by 4.3%, 7.3%, 10.3%; the average yield of gas were decreased by 1%, 2.1%, 2.5%.Experiment studied using the same oil, how was the product distribution affected by the reaction temperature and reaction time simultaneously. The results show that: in the high-temperature section followed by low-temperature section reactions, the high-temperature section has larger effect on product distribution than low-temperature section; the reaction temperature has greater impact than the reaction time. The higher of high-temperature section and longer reaction time, is the best condition for a better product distribution.更多还原