现场污水蒸发处理研究

发布时间：2018-01-05 11:34

本文关键词：现场污水蒸发处理研究　出处：《西安石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：每年我国各大油田会有大量的污水产生,若直接将其外排,势必会对当地环境及地面设施造成危害,采用罐车输送的方式,缺点在于一是成本高,二是输送过程中污水不同程度的逸散,本文以油田现场污水的处理为研究背景,采用蒸发方式对其进行处理,则能最大程度的减少上述问题。主要研究内容和结论如下:(1)基于现如今进行污水处理的装置及本文的创新点,设计一套低成本、清洁化的卧式炉膛蒸发装置,并利用绘图软件CAD实现几何三维模型的建立。(2)针对污水中的硫化物,采用不同的除硫剂利用实验的方法对污水进行脱硫处理,实验结果得出次氯酸盐和氯化铜、H2O2的除硫效果比较好。(3)根据所设计的蒸发装置的尺寸,对天然气、污水的输送速度、流量以及最终装置所产生的热量进行理论计算,根据所得出的数据为后期的模拟提供相对应的边界条件以及物性参数。(4)基于STAR CCM软件在对传热模型进行网格划分的优势性,利用STAR CCM软件对该模型的模拟计算域进行网格划分。(5)在FLUENT模拟软件中数值模拟方法研究的基础上,采用基于传热方面的热传导模型,并且选用多相流模型中的VOF模型,对流体速度等于0m/s和2m/s的热流场进行模拟,根据所得出的云图分析研究了炉膛装置周围的水体内部温度场的分布、热流密度的分布及热通量等的分布进行对比,从而能够很明显的看出污水动态情况下热量的传递比较迅速,从而对污水蒸发的趋势进行一个预测。(6)根据适用于全国水面的蒸发公式对污水的蒸发量进行理论计算,然后采用模拟软件aspen plus对污水蒸发量进行数值模拟计算,模拟结果与理论计算所得的结果进行对比,差距在误差范围内。
[Abstract]:Every year a large number of sewage will be produced in the major oilfields of our country, if it is discharged directly, it will certainly cause harm to the local environment and ground facilities. The other is the dispersal of sewage in the process of transportation. In this paper, the treatment of oilfield field sewage is studied, and the evaporation method is adopted to treat it. The main research contents and conclusions are as follows: 1) based on the present sewage treatment device and the innovation of this paper, we design a set of low-cost. Clean horizontal furnace evaporation device, and use the drawing software CAD to realize the establishment of geometric 3D model. 2) aiming at sulfides in sewage. Different sulfur removal agents were used to desulphurize the wastewater. The experimental results showed that the desulfurization effect of hypochlorite and copper chloride H _ 2O _ 2 was better. (3) according to the size of the evaporator designed. The transportation speed, flow rate of natural gas and sewage and the heat produced by the final plant are calculated theoretically. According to the obtained data, the corresponding boundary conditions and physical parameters are provided for the later simulation. (4) based on the STAR CCM software, the advantage of meshing the heat transfer model is obtained. STAR CCM software is used to mesh the simulation domain of the model. (5) based on the research of numerical simulation method in FLUENT simulation software. The heat conduction model based on heat transfer and the VOF model in the multiphase flow model are used to simulate the heat flow field with fluid velocity equal to 0 m / s and 2 m / s. The distribution of temperature field, the distribution of heat flux and the distribution of heat flux are compared according to the cloud image. Thus it can be clearly seen that the heat transfer is relatively rapid under the dynamic conditions of sewage. Thus, the trend of sewage evaporation is predicted. 6) based on the evaporation formula applicable to the national water surface, the evaporation capacity of sewage is calculated theoretically. Then the simulation software aspen plus is used to simulate and calculate the sewage evaporation. The result of simulation is compared with the result of theoretical calculation, and the difference is within the error range.
【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】：X741

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