水力旋流器钻井岩屑分离效果研究

发布时间：2018-01-09 10:32

本文关键词：水力旋流器钻井岩屑分离效果研究　出处：《西南石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：水力旋流器是工业中常用的固液分离设备,其具有结构简单、操作方便、无动力部件以及应用经济性等优点。但因其内部为复杂三维强旋转流场,难以进行精确描述,虽有各种理论模型,但在工业中仍是利用经验模型进行设计与应用。在实际应用过程中,即使水力旋流器的结构最优化,然而操作参数与物料参数的变化仍会导致水力旋流器的分离效果变差。因而为了保证在使用过程中使得水力旋流器的分离性能保持在较好的范围内,有必要对操作参数、物料参数与性能参数之间的关系进行探讨。本文的主要目的是运用除泥器中常用的FXJ-100型水力旋流器探讨操作参数、物料参数、性能参数三者之间的内在关系,并运用离心泵的相关知识对与水力旋离器操作性能相关联的离心泵进行调节,以期使水力旋流器在物料参数发生变化时,经过调节离心泵后仍能保持较好的分离效果。首先,根据水力旋流器内部流场的特征选用合适的数值计算模型。在工程应用中,固控系统内的携岩钻井液多为非牛顿流体,而携岩钻井液则是由钻井液与钻井岩屑组成,因而根据已有的关于携岩钻井液以及钻井液流变性的研究成果,选用赫-巴模型来描述非牛顿流体的本构方程。利用MIXTURE与RSM模型进行与已有hsieh实验条件相同的数值模拟,并将模拟所得结果与实验结果进行对比,确保数值模型的有效性。其次,进行数值正交试验设计,探索物料参数与操作参数之间的相互关系。对数值正交试验结果进行方差分析,并找到对于水力旋流器的性能参数有明显显著影响的单因素与物料参数与操作参数的交互作用。根据数值正交试验所得显著性影响因子,分别对水力旋流器性能参数中的入口压力降、底流水量比、分离粒度以及分级效率曲线四个方面进行分析,分别确定各个显著影响因素对性能参数的影响规律,为后续水力旋流器应用系统的调节提供依据。最后,在水力旋流器应用系统中,为水力旋流器提供流量与操作压力的设备为离心泵。为保证在结构最优化的水力旋流器应用过程中,性能参数保持在较为合理的状态,根据上述所得各显著因素变化对性能参数的影响规律,进行与水力旋流器操作参数相关的离心泵的调试,并进行归纳总结不同物料参数变化情况下,离心泵调节的方式以及调节后水力旋流器分离效果的改善情况。
[Abstract]:Hydrocyclone is a commonly used solid-liquid separation equipment in industry. It has the advantages of simple structure, convenient operation, no power components and application economy, but its internal is a complex three-dimensional strong rotating flow field. It is difficult to accurately describe, although there are various theoretical models, but in industry is still the use of empirical models for design and application, in the actual application process, even the structure of hydrocyclone optimization. However, the variation of operating parameters and material parameters will still lead to the separation effect of hydrocyclone become worse, so in order to ensure the separation performance of hydrocyclone in the process of operation in a better range. It is necessary to discuss the relationship among operating parameters, material parameters and performance parameters. The main purpose of this paper is to discuss the operation parameters and material parameters by using FXJ-100 hydrocyclone, which is commonly used in the desliming device. The inherent relationship among the three performance parameters, and use the relevant knowledge of centrifugal pump to adjust the centrifugal pump associated with the operation performance of hydraulic spindles, in order to make the hydrocyclone change when the material parameters change. After adjusting the centrifugal pump, the separation effect can be maintained. Firstly, according to the characteristics of the hydrocyclone internal flow field, the appropriate numerical calculation model is selected. The rock carrying drilling fluid in the solid control system is mostly non-Newtonian fluid, and the rock carrying drilling fluid is composed of drilling fluid and drilling cuttings. Therefore, according to the existing research results of rock carrying drilling fluid and drilling fluid rheology. The Herba model is used to describe the constitutive equation of non-Newtonian fluid, and the MIXTURE and RSM models are used to simulate the constitutive equations of non-Newtonian fluid under the same conditions as the existing hsieh experiments. The simulation results are compared with the experimental results to ensure the validity of the numerical model. Secondly, the numerical orthogonal test design is carried out. The relationship between material parameters and operation parameters was explored. The results of numerical orthogonal test were analyzed by variance analysis. The interaction between single factor and material parameter and operation parameter is found, which has obvious influence on the performance parameters of hydrocyclone, and the significant influence factor is obtained according to the numerical orthogonal test. The inlet pressure drop, bottom income ratio, separation granularity and classification efficiency curve of hydrocyclone performance parameters are analyzed respectively, and the influence law of each significant influence factor on performance parameters is determined respectively. To provide the basis for the subsequent hydrocyclone application system regulation. Finally, in the hydrocyclone application system. Centrifugal pump is the equipment that provides flow and operating pressure for hydrocyclone. In order to ensure that the performance parameters are kept in a more reasonable state during the application of the hydrocyclone with optimized structure. According to the influence of the above significant factors on the performance parameters, the centrifugal pump related to the operation parameters of hydrocyclone was debugged and summarized under the condition of different material parameters. The way of regulating centrifugal pump and the improvement of separation effect of hydrocyclone after adjusting.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE927

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