An experimental investigation on the effect of particle size into the flowability of fly ash

被引：12

作者：

Rohilla, Lokesh ^{[1
]}

Garg, Vivek ^{[1
]}

Mallick, S. S. ^{[1
]}

Setia, Gautam ^{[1
]}

机构：

[1] Thapar Univ, Dept Mech Engn, Patiala 147004, Punjab, India

来源：

POWDER TECHNOLOGY | 2018年 / 330卷

关键词：

Fly ash; Powder flow properties; Hoppers; Critical particle size; Wall friction; BULK FLOW PROPERTIES; HIGH-TEMPERATURE; PULVERIZED COAL; HOPPER DESIGN; FOOD POWDERS; BEHAVIOR; FORCES; METHODOLOGY; PROPERTY; FRICTION;

D O I：

10.1016/j.powtec.2018.02.013

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this paper, physical properties and flow properties of fly ash collected from seven fields of Electro-Static precipitator (ESP) hoppers of a coal fired thermal power plant have been investigated by using Powder Flow Tester operating based on Jenike's methodology. It was experimentally observed that the fly ash from different ESP hoppers have different flow properties. Various powder flow properties, such as cohesion, unconfined yield strength, angle of internal friction and wall friction angle were found to have power law variation with median particle size. Critical particle size, which caused a change in the flow properties of fly ash from cohesive to easy flowing, was experimentally evaluated and validated. Hopper half angle and critical outlet opening trends were determined for different fly ash samples to achieve mass flow condition for discharge. Additionally, two power law models were also developed for estimating hopper half angle and critical outlet openings using powder flow properties. (C) 2018 Published by Elsevier B.V.

引用

页码：164 / 173

页数：10

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