蜡油加氢裂化装置流程模拟与优化研究

发布时间：2018-05-05 03:30

本文选题：加氢裂化 + 流程模拟　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：本文以某石化公司220万吨/年蜡油加氢裂化装置为研究对象。首先介绍了该装置的基本情况,然后以现场的标定数据为基础,使用KBC公司的Petro-SIM流程模拟软件中的HCR-SIM模块对该加氢裂化装置的全套流程进行了模拟,建立了全装置的流程模型,包括其反应系统和分离系统。将模拟结果与现场标定数据进行对比,误差在合理范围内,表明本文所建立的模型可以较好的反映装置的实际生产状况,可以将其用于后续的分析优化工作中。以建立的加氢裂化装置模型为工具,分析了反应温度、反应压力、空速、分馏塔操作条件等因素对装置产品分布、产品质量等的影响,然后以最大限度生产石脑油、航煤、柴油等为目标函数,建立了稳态优化问题,并进行了求解,对实际装置的操作具有指导意义。能量系统分析部分首先根据三环节能量分析方法,对该加氢裂化装置能量转换与传输、能量工艺利用及能量回收三个环节分别进行了计算,结果表明该装置工艺总用能为3630.87 MJ/t原料,能量转换和传输效率为85.08%,能量回收利用率54.73%,找到了装置节能优化的方向,并针对各环节提出了相应的节能措施。然后用夹点技术对装置现行的换热网络进行了分析,找出了违背夹点原则的不合理换热,提出了换热网络的两种优化方案,用HTRI软件对各方案中新增及改动的换热器进行了设计和校核,比较了两种优化方案的可行性和经济性,结果表明方案二要优于方案一,可节省6.39%的冷公用工程及20.13%的热公用工程,投资回收期为0.39年。最后,针对本装置低温热源浪费较多的现状,提出了用低温余热发电的回收方案,经计算得发电量为3.5MW,具有较好的经济效益。
[Abstract]:The hydrocracking unit of 2.2 million t / a wax oil in a petrochemical company was studied in this paper. The basic conditions of the unit are introduced at first, and then based on the field calibration data, the full set of processes of the hydrocracking unit are simulated by using the HCR-SIM module in the Petro-SIM process simulation software of KBC Company, and the process model of the whole unit is established. Including reaction system and separation system. The simulation results are compared with the field calibration data, and the error is within a reasonable range, which shows that the model can reflect the actual production situation of the device and can be used in the subsequent analysis and optimization work. The effects of reaction temperature, reaction pressure, space velocity and operation conditions of fractionator on the product distribution and product quality of the hydrocracking unit were analyzed by using the established hydrocracking unit model. The naphtha and aviation coal were produced to the maximum extent. The steady-state optimization problem is established and solved by using diesel oil as the objective function, which is of guiding significance to the operation of practical equipment. In the part of energy system analysis, the energy conversion and transmission, energy process utilization and energy recovery of the hydrocracking unit are calculated according to the three-ring energy analysis method. The results show that the total energy consumption of the plant is 3630.87 MJ/t, the energy conversion and transmission efficiency is 85.08, and the energy recovery utilization ratio is 54.73. The direction of energy saving optimization is found, and the corresponding energy-saving measures are put forward for each link. Then, the current heat transfer network of the device is analyzed by pinch technique, and the unreasonable heat transfer that violates the pinch principle is found out, and two optimization schemes of the heat transfer network are put forward. The new and modified heat exchangers in each scheme are designed and checked by HTRI software. The feasibility and economy of the two optimization schemes are compared. The results show that the second scheme is better than the first. It can save 6.39% cold utility and 20.13% hot utility, and the investment payback period is 0.39 years. Finally, in view of the present situation that the low temperature heat source is wasted more in this device, the recovery scheme of generating electricity with low temperature waste heat is put forward. The calculation results show that the electricity generating capacity is 3.5 MWs, which has good economic benefit.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE96

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