摘要
针对炼油厂渣油加氢装置进料性质的变化引起产品及工艺条件变化的情况,提出一种渣油加氢脱残炭反应动力学模型并对其进行了验证.结果表明,在反应压力为17.0MPa、液时空速为0.4h-1、氢油体积比（700～1000）：1、反应温度380 ～418℃的工况下,以两种常压渣油的混合油为加工原料,选择催化剂活性平稳阶段（1000～2000 h）工业装置数据进行了非线性拟合获得动力学参数和理论反应温度,将该温度下产品残炭计算值与实验值进行了对比,两者以对角线形式均匀分布,非常吻合,且两者平均相对误差为1.6％;对理论反应温度与预期运行周期（DOS）进行拟合,催化剂活性稳定后两者呈较好的线性关系,通过计算得知,当装置操作温度达到418℃时的DOS计算值为548 d,DOS实验值为523 d,两者平均相对误差为4.6％,说明该模型准确度较高.最后选用其他原料油对该模型进行了验证,验证产品中残炭实验值与计算值平均相对误差为1.3％,当反应温度为399.65℃时的DOS计算值与实验值的平均相对误差为4.1％,满足动力学相对误差不大于5％的要求,说明该模型可靠性较高.
For the changes of the products and the process conditions due to the changes of feed properties of the refinery, a reaction kinetic model of residue hydrodecarbonization is built and verified. Under the conditions of 17.0 MPa reaction pressure, 0.4 h -1 LHSV, 700 - 1 000 volumetric hydrogen to oil ratio and 380 -418 ℃ reaction temperature, the kinetic parameters and theoretical reaction temperature are obtained by non-linear fitting of commercial data of stabilized catalyst operation （ 1 000 - 2 000 hours） with blended feed of two atmospheric residues. The calculated carbon residue under this temperature is compared with the test data, which shows that these two data fit well. The average relative error of these two data is 1.6%. The theo- retical reaction temperature is fitted with DOS and these two are in good linearity. The calculated data of DOS at 418 ℃ operating temperature is 548 d and laboratory data of DOS is 523 d. The average error of these two data is 4.6% , which indicates that the accuracy of this model is high. In addition, the other feedstock oil is selected to verify the model. The average error between the verification test data and calculated data of carbon residue in product oil is 1.3%. The average error between the calculated DOS data and test data at the condi- tions of 399.65 ℃ reaction temperature is 4.1% , which meets the maximum 5% requirement in kinetics. All these show that the model has a high reliability.
出处
《炼油技术与工程》
CAS
2014年第7期19-22,共4页
Petroleum Refinery Engineering
关键词
渣油
加氢脱残炭
反应动力学模型
催化剂活性
残炭
预期运行周期
residue oil, hydrodecarbonization, reaction kinetic model, catalyst activity, carbon resi- due, DOS
