油罐呼吸损耗机理及物性场研究

发布时间：2018-06-27 20:37

本文选题：油罐蒸发损耗 + 模拟　；参考：《西安石油大学》2017年硕士论文

【摘要】：油品在静止储存过程中产生的蒸发损耗会造成严重的自然生态环境污染、巨大经济损失、对工作人员身体健康有害以及形成对站场的安全生产的潜在威胁。所以对影响蒸发损耗的因素和参数变化规律的研究讨论,以及用实验设备和计算机软件来模拟油罐的实际工作状态,寻求高效廉价的降低油品蒸发损耗的方法是非常有必要的。本文从油罐呼吸损耗的计算方法入手,对比了目前现存的7种损耗计算公式,分析了其优劣,并且建立了基于峰值守恒法的呼吸损耗计算模型,得到了更精确的损耗计算公式。采用FLUENT模拟软件建立油罐模型、划分网格等,通过计算和后处理得到了油罐内部温度和浓度的分布云图,模拟得出了其温度和浓度的变化情况。通过搭建油罐小呼吸损耗实验工作台,测量得出了在整个呼吸损耗发生过程中油罐内部不同高度的温度和浓度的变化情况,以及原始、起始、终了的3个状态罐内压力的变化规律。并且通过测量和计算得出了油罐小呼吸损耗量和其他损耗计算公式的结果,通过数据的对比,得出了基于峰值守恒法的损耗计算模型公式的计算结果更加精确。根据调研目前的降低油罐呼吸损耗的方法,提出了在油罐所使用的钢材能承受的最大周期性压力的情况下,提高呼吸阀的工作压力,以及采用吸附法和吸收法联合油气回收装置,降低了油品蒸发损耗量。
[Abstract]:The evaporation loss of oil products in static storage process will cause serious pollution of natural ecological environment, huge economic loss, harmful to the health of the staff and the potential threat to the safety production of the station yard. Therefore, it is very necessary to study and discuss the factors affecting evaporation loss and the changing rule of parameters, and to use the experimental equipment and computer software to simulate the actual working state of the oil tank and to find a method to reduce the evaporation loss of oil products efficiently and cheaply. This paper begins with the calculation method of breathing loss of oil tank, compares the existing seven formulas of loss calculation, analyzes its merits and demerits, and establishes a model of calculating respiratory loss based on peak conservation method, and obtains a more accurate formula for calculating loss. The oil tank model was built by fluent software, and the distribution of temperature and concentration in the tank was obtained by calculation and post-processing, and the variation of temperature and concentration was obtained by simulation. By setting up the experimental table of small breathing loss of oil tank, the changes of temperature and concentration of different heights inside the tank during the whole process of breathing loss are measured, as well as the original and initial. The variation of the pressure in the tank at the end of the three states. Through measuring and calculating, the results of calculation formula of small breathing loss and other loss of oil tank are obtained. Through the comparison of data, the calculation results of loss model formula based on peak conservation method are obtained to be more accurate. Based on the investigation of the current method to reduce the breathing loss of the tank, it is proposed to increase the working pressure of the breathing valve under the condition that the steel used in the tank can withstand the maximum periodic pressure. And the oil and gas recovery unit is combined with adsorption method and absorption method to reduce the evaporation loss of oil product.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE972

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