本文關(guān)鍵詞：水力旋流器鉆井巖屑分離效果研究　出處：《西南石油大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 水力旋流器 數(shù)值模擬 非牛頓流體 正交試驗(yàn) 分離效果

【摘要】：水力旋流器是工業(yè)中常用的固液分離設(shè)備,其具有結(jié)構(gòu)簡(jiǎn)單、操作方便、無(wú)動(dòng)力部件以及應(yīng)用經(jīng)濟(jì)性等優(yōu)點(diǎn)。但因其內(nèi)部為復(fù)雜三維強(qiáng)旋轉(zhuǎn)流場(chǎng),難以進(jìn)行精確描述,雖有各種理論模型,但在工業(yè)中仍是利用經(jīng)驗(yàn)?zāi)Ｐ瓦M(jìn)行設(shè)計(jì)與應(yīng)用。在實(shí)際應(yīng)用過(guò)程中,即使水力旋流器的結(jié)構(gòu)最優(yōu)化,然而操作參數(shù)與物料參數(shù)的變化仍會(huì)導(dǎo)致水力旋流器的分離效果變差。因而為了保證在使用過(guò)程中使得水力旋流器的分離性能保持在較好的范圍內(nèi),有必要對(duì)操作參數(shù)、物料參數(shù)與性能參數(shù)之間的關(guān)系進(jìn)行探討。本文的主要目的是運(yùn)用除泥器中常用的FXJ-100型水力旋流器探討操作參數(shù)、物料參數(shù)、性能參數(shù)三者之間的內(nèi)在關(guān)系,并運(yùn)用離心泵的相關(guān)知識(shí)對(duì)與水力旋離器操作性能相關(guān)聯(lián)的離心泵進(jìn)行調(diào)節(jié),以期使水力旋流器在物料參數(shù)發(fā)生變化時(shí),經(jīng)過(guò)調(diào)節(jié)離心泵后仍能保持較好的分離效果。首先,根據(jù)水力旋流器內(nèi)部流場(chǎng)的特征選用合適的數(shù)值計(jì)算模型。在工程應(yīng)用中,固控系統(tǒng)內(nèi)的攜巖鉆井液多為非牛頓流體,而攜巖鉆井液則是由鉆井液與鉆井巖屑組成,因而根據(jù)已有的關(guān)于攜巖鉆井液以及鉆井液流變性的研究成果,選用赫-巴模型來(lái)描述非牛頓流體的本構(gòu)方程。利用MIXTURE與RSM模型進(jìn)行與已有hsieh實(shí)驗(yàn)條件相同的數(shù)值模擬,并將模擬所得結(jié)果與實(shí)驗(yàn)結(jié)果進(jìn)行對(duì)比,確保數(shù)值模型的有效性。其次,進(jìn)行數(shù)值正交試驗(yàn)設(shè)計(jì),探索物料參數(shù)與操作參數(shù)之間的相互關(guān)系。對(duì)數(shù)值正交試驗(yàn)結(jié)果進(jìn)行方差分析,并找到對(duì)于水力旋流器的性能參數(shù)有明顯顯著影響的單因素與物料參數(shù)與操作參數(shù)的交互作用。根據(jù)數(shù)值正交試驗(yàn)所得顯著性影響因子,分別對(duì)水力旋流器性能參數(shù)中的入口壓力降、底流水量比、分離粒度以及分級(jí)效率曲線四個(gè)方面進(jìn)行分析,分別確定各個(gè)顯著影響因素對(duì)性能參數(shù)的影響規(guī)律,為后續(xù)水力旋流器應(yīng)用系統(tǒng)的調(diào)節(jié)提供依據(jù)。最后,在水力旋流器應(yīng)用系統(tǒng)中,為水力旋流器提供流量與操作壓力的設(shè)備為離心泵。為保證在結(jié)構(gòu)最優(yōu)化的水力旋流器應(yīng)用過(guò)程中,性能參數(shù)保持在較為合理的狀態(tài),根據(jù)上述所得各顯著因素變化對(duì)性能參數(shù)的影響規(guī)律,進(jìn)行與水力旋流器操作參數(shù)相關(guān)的離心泵的調(diào)試,并進(jìn)行歸納總結(jié)不同物料參數(shù)變化情況下,離心泵調(diào)節(jié)的方式以及調(diào)節(jié)后水力旋流器分離效果的改善情況。
[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.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TE927

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