基于双泵并联的膏体输送特性研究

发布时间：2018-04-02 21:21

本文选题：双泵并联　切入点：膏体充填　出处：《河北工程大学》2016年硕士论文

【摘要】：膏体充填可以使煤矿解决现存的“三下”压煤,并且增强了煤矿的开采率,防止地表塌陷,达到煤矿的绿色生产,改变了以前无法开采和污染环境的现状,使煤矿形成一个从开采到环境治理新理念的技术发展[1]。虽然膏体管道输送技术解决了工业固体废弃物资源化利用的输送瓶颈,但是膏体属于固液存在的两相流,对于充填站制备的料浆在管道输送过程中压力损失是难以解决的问题,相关经验公式也不能直接应用到工程中。本论文提出了一种检测料浆在管路输送中压力损失的方法,通过应变片的形变转换为电阻的变化,将其运用到膏体充填的实际工程中,同时建立基于双泵并联的膏体管道输送阻力计算模型,并能够在设计煤矿膏体充填系统时能应用到工程中,其主要内容如下:(1)通过对工业泵的结构、性能特点、工作原理的介绍,并对膏体充填料浆进行了可泵性研究,而且对充填材料的坍落度和泌水率实验分别从实验目的和实验步骤进行了理论研究,分析了影响水力坡度的主要因素。(2)建立双泵并联的优化模型,采用数值分析方法进行曲线拟合,应用MATLAB等仿真工具求解出约束条件的最优解。基于双泵并联的膏体充填对输送管路的直径、参数以及布置进行设计和选择,并且分析料浆在管路输送的可靠性。(3)建立膏体充填系统的料浆在管道输送过程中的压力损失计算模型以及方法,对压力损失公式进行误差分析。(4)在满足煤矿开采充填量要求的情况下,预计算出膏体充填系统的料浆在管道运送过程中的压力损失,探究影响其压力损失的关键因素,为实际工程中有效降低料浆在管路泵送时的压力损失提供理论基础,为今后设计实际充填系统提供重要参考价值。
[Abstract]:Paste filling can make the coal mine solve the existing "three down" coal compaction, and enhance the mining rate of coal mine, prevent the ground from collapsing, reach the green production of the coal mine, and change the present situation which could not be exploited and pollute the environment before.To form a new concept of coal mining from mining to environmental control technology development [1].Although the technology of plaster pipeline transportation solves the bottleneck of the utilization of industrial solid waste, the paste belongs to the two-phase flow of solid and liquid, so it is difficult to solve the pressure loss of slurry prepared by filling station in the course of pipeline transportation.The relevant empirical formula can not be directly applied to engineering.In this paper, a method of detecting the pressure loss of slurry in pipeline transportation is proposed. The strain gauge is transformed into resistance and applied to the practical engineering of paste filling.At the same time, the model of resistance calculation of plaster pipeline based on parallel connection of double pumps is established, and it can be applied to engineering when designing plaster filling system in coal mine. Its main contents are as follows: 1) through the structure and performance characteristics of industrial pump,The working principle is introduced, and the pumpability of paste filling slurry is studied, and the experimental results of slump and bleeding rate of filling material are studied theoretically from the experimental purpose and the experimental steps, respectively.In this paper, the main factors affecting hydraulic gradient are analyzed. The optimization model of double pump parallel connection is established. The curve fitting is carried out by numerical analysis method, and the optimal solution of constraint condition is solved by MATLAB and other simulation tools.The diameter, parameters and arrangement of the pipeline are designed and selected based on the paste filling with parallel double pumps.The reliability of slurry in pipeline transportation is analyzed. The calculation model and method of pressure loss of slurry in plaster filling system are established.The error analysis of the formula of pressure loss. 4) under the condition of meeting the requirement of coal mining filling quantity, the pressure loss of paste filling system in pipeline transportation process is calculated, and the key factors affecting its pressure loss are explored.It provides a theoretical basis for effectively reducing the pressure loss of slurry during pipe pumping in practical engineering, and provides an important reference value for the design of practical filling system in the future.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TD823.7

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