A one-dimensional plug-flow model of a counter-current spray drying tower

被引：41

作者：

Ali, Muzammil ^{[1
]}

Mahmud, Tariq ^{[1
]}

Heggs, Peter John ^{[1
]}

Ghadiri, Mojtaba ^{[1
]}

Djurdjevic, Dusan ^{[2
]}

Ahmadian, Hossein ^{[2
]}

de Juan, Luis Martin ^{[2
]}

Amador, Carlos ^{[2
]}

Bayly, Andrew ^{[2
]}

机构：

[1] Univ Leeds, Inst Particle Sci & Engn, Leeds LS2 9JT, W Yorkshire, England

[2] P&G Tech Ctr Ltd, Newcastle Upon Tyne NE12 9BZ, Tyne & Wear, England

来源：

CHEMICAL ENGINEERING RESEARCH & DESIGN | 2014年 / 92卷 / 05期

关键词：

Spray drying; Slurry droplet drying; One dimensional spray tower model; Counter-current spray tower model; Heat and mass transfer; Plug flow model; DEVELOPING DROP MORPHOLOGY; VOLATILE SUBSTANCES; MASS-TRANSFER; PARTICLE; RATES; EVAPORATION; RETENTION;

D O I：

10.1016/j.cherd.2013.08.010

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A one-dimensional numerical model for a detergent slurry drying process in a counter-current spray drying tower is developed for the prediction of the gas and droplet/particle temperature profiles within the tower. The model accommodates droplets/particles over a range of sizes. A semi-empirical slurry droplet drying model is integrated with a counter-current tower simulation based on mass, energy and particulate phase momentum balances in order to calculate the drying rate and the particle residence time within the tower. The coupled first order ordinary differential equations for the two phases are solved numerically using the iterative shooting method in an algorithm developed within MATLAB. The predictions of the numerical model are compared with industrial pilot plant data. The results are found to vary significantly with the specified size distribution of the droplets. Despite the simplicity of the model in ignoring the coalescence, agglomeration, wall deposition and re-entrainment, the model gives reasonable agreement with the experimental data. (C) 2013 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

引用

页码：826 / 841

页数：16

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