矿浆管道输送工程试验系统设计与弯管特性研究

发布时间：2018-03-08 09:47

本文选题：矿浆管道输送　切入点：试验系统　出处：《昆明理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：长距离矿浆管道输送方式具有输送能力大、耕地占用少、不受气候条件限制、节能减排等许多优点。随着对偏远地区矿产资源需求的增加,长距离矿浆管道输送的应用日益广泛。然而,矿浆管道输送过程中经常可能出现淤积、堵塞、对内管壁产生严重磨损等问题。作为管道输送重要构件——弯管,其结构相对直管段更为复杂,在浆体流经弯管时更易出现以上问题。因此,对浆体管道输送及弯管特性进行研究具有十分重要的意义。由于固液两相流的复杂性、理论研究的相对局限性使得浆体管道输送过程中很多问题还得不到很好的解决,管道浆体输送的很多问题需要借助试验的方法来研究,为管道水力输送的实际工业应用提供支持。因此,浆体管道输送工程试验系统的设计显得尤为重要。论文的主要研究工作如下：(1)分析矿浆管道输送工艺流程及部分重要参数,研究管道输送特性。设计并建设一套综合性多功能的室内管道输送试验平台。对试验平台的系统结构测试方法和主要功能进行着重介绍,并对试验平台矿浆特性进行实验分析。初步确定了工艺优化设计所采用的计算公式,并对主要固体物料,浆体流变特性进行了分析研究。(2)结合国内某著名管道公司实时运行数据,对压差关系式法进行验证,通过两组实验：压差与流量的关系、压差关系式与流量的关系进行对比,对原有公式进行修正。对弯管前后的直管段是否对实验结果有影响做了验证说明,试验中采用两条管径不同的弯管。通过实验来研究弯管的结构参数在一定范围内,弯管流量系数与弯管材质、大小的关系。(3)针对Metzner-Reed模型的分析,结合昆明理工大学矿物管道输送工程技术研究中心129实验室这一小型浆体管道输送试验系统初步研究了铁精矿浆体流经水平弯管的局部阻力特性,具体分析了不同曲率半径Re对弯管的局部阻力系数的影响,浆体流速、体积浓度等的变化对弯管阻力特性的影响。本文对浆体管道输送特性进行理论分析和实际验证,设计并建立浆体试验工程系统,确定输送方案及相关参数,具有较高的现实意义和应用价值。
[Abstract]:Long distance slurry pipeline transportation has many advantages, such as large transportation capacity, less occupation of cultivated land, no restriction of climate conditions, energy saving and emission reduction, etc. With the increasing demand for mineral resources in remote areas, The application of long distance slurry pipeline transportation is becoming more and more extensive. However, sludge, blockage and serious wear on the inner pipe wall may often occur in the process of slurry pipeline transportation. Compared with the straight pipe section, the structure of the pipe is more complex, and the above problems are more likely to occur when the slurry flows through the curved pipe. Therefore, it is of great significance to study the transport of slurry pipe and the characteristics of the curved pipe. Because of the complexity of solid-liquid two-phase flow, Due to the relative limitations of theoretical research, many problems in slurry pipeline transportation can not be solved well, and many problems in pipeline slurry transportation need to be studied by means of experimental methods. This paper provides support for practical industrial application of pipeline hydraulic transportation. Therefore, the design of slurry pipeline transportation engineering test system is particularly important. The main research work of this paper is as follows: 1) analyzing the process flow and some important parameters of slurry pipeline transportation. This paper studies the characteristics of pipeline transportation, designs and builds a set of comprehensive and multifunctional test platform for indoor pipeline transportation, and introduces emphatically the test methods and main functions of the system structure of the test platform. The characteristics of the slurry on the test platform are analyzed experimentally. The calculation formulas used in the process optimization design are preliminarily determined, and the main solid materials are also studied. The rheological characteristics of slurry are analyzed and studied. (2) based on the real-time operation data of a famous pipeline company in China, the pressure differential relation method is verified. The relationship between pressure difference and flow rate, the relationship between pressure difference and flow rate is compared through two groups of experiments: the relationship between pressure difference and flow rate, the relationship between pressure difference and flow rate, and the relationship between pressure difference and flow rate. The original formula is revised. Whether the straight section before and after the bend has an effect on the experimental results is verified. In the experiment, two pipes with different diameters are used. The structural parameters of the elbow are studied in a certain range. The relationship between the flow coefficient and the material and size of the bends. (3) the analysis of the Metzner-Reed model, The local resistance characteristics of iron concentrate slurry flowing through horizontal bend pipe have been preliminarily studied with 129 laboratory of Kunming University of Technology University of Technology for mineral pipeline transportation engineering, which is a small slurry pipeline transportation test system. The influence of different curvature radius re on the local resistance coefficient of curved pipe, the influence of slurry velocity and volume concentration on the resistance characteristic of bent pipe is analyzed in detail, and the theoretical analysis and practical verification of slurry pipeline transportation characteristic are carried out in this paper. It is of great practical significance and application value to design and establish the slurry test engineering system and determine the transportation scheme and related parameters.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TD50

【相似文献】