Abstract

A review of the work devoted to studying the service life of power equipment’s elements shows that important characteristics, such as silicon content, polydispersity, and particle shape of transported materials, are not taken into account in the formulas for calculating the abrasive wear of the hydrotransport pipelines of TPP’s ash- and slag-removal systems. There are separate experimental values of the coefficients of relative abrasiveness of ash and slag materials, which differ significantly. Abrasive wear leads to a decrease in the reliability of the hydraulic ash-removal system, forced equipment downtime, environmental degradation in places where slurry pipelines are depressurized, and lower economic efficiency of ash and slag transportation. The causes of increased abrasive wear are considered, which leads to a decrease in the service life of pipelines of ash- and slag-removal systems in thermal power plants. The main factors affecting the abrasive wear of pipelines are identified, and their impact is evaluated. It is shown that one of the key characteristics that affect the wear rate of slurry pipelines is the abrasiveness of the transported material, which, in turn, depends on the content of silicon oxides as well as on the shape and size of the ash particles. The results of calculating the specific abrasive wear of slurry pipelines for various speeds and mass concentration of pulp during its transportation from boilers in which three types of coal of various characteristics are used as fuel are presented. The results can be used in planning the timing of repair and maintenance work in order to increase the overhaul period of hydraulic ash-removal systems.

中文翻译：

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磨料磨损对TPP除灰渣系统液压输送系统使用寿命的影响评估

摘要

对致力于研究电力设备元件使用寿命的研究的回顾表明，在计算水力运输工具的磨耗公式中，并未考虑重要的特性，例如硅含量，多分散性和运输材料的颗粒形状TPP除灰和除渣系统的管道。粉煤灰和炉渣材料的相对磨蚀系数有单独的实验值，它们之间存在显着差异。磨料磨损会导致液压除灰系统的可靠性下降，设备强制停机，泥浆管道减压的环境恶化以及灰烬和炉渣运输的经济效率降低。考虑到磨料磨损增加的原因，这导致了火力发电厂除灰，除渣系统管道使用寿命的缩短。确定影响管道磨耗的主要因素，并评估其影响。结果表明，影响泥浆管道磨损率的关键特征之一是被输送物料的磨蚀性，而磨蚀性又取决于氧化硅的含量以及灰分颗粒的形状和大小。给出了以三种速度将各种特性的煤作为燃料的锅炉输送过程中不同速度和浆液质量浓度下浆液管道比磨损的计算结果。