Study and comparison of different drying processes of porous particle at high temperature

IF 1.1 4区工程技术 Q4 Engineering

High Temperatures-high Pressures Pub Date : 2022-01-01 DOI:10.32908/hthp.v51.1103

Souad Messai, L. Chrusciel, O. Al-Hagan, Mona Almuadi, J. Sghaier

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引用次数: 0

Abstract

This work presents a comparative study of four drying processes of a porous media: superheated steam drying at atmospheric pressure (APSSD), humid air (HA), low pressure superheated steam drying (LPSSD) and vacuum drying (VD). A single porous particle model has been developed to simulate the four drying processes. The model is based on the method of averaging volume. Spherical porous particles of coal are used as the model material in this paper. The evaporation rates are equal for these processes in point called the inversion temperature. This temperature was calculated during the constant rate period (CRP) and the falling rate period (FRP). A variation in the values of inversion temperature was observed (363-503 K). The effect of drying parameters such as: particle radius, gas mass flux, permeability, porosity and operating pressure were investigated. Several researchers have reported the noticeable variation of the inversion temperature values according to the drying period used to calculate this key parameter. Our results are compared with those obtained from a front model reported in the literature. A good agreement is found.

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多孔颗粒高温干燥不同工艺的研究与比较

本文对多孔介质的常压过热蒸汽干燥(APSSD)、湿空气干燥(HA)、低压过热蒸汽干燥(LPSSD)和真空干燥(VD)四种干燥工艺进行了比较研究。建立了单孔颗粒模型来模拟四种干燥过程。该模型基于平均体积法。本文以煤的球形多孔颗粒为模型材料。这些过程的蒸发速率在称为转化温度的点上相等。该温度是在恒定速率期(CRP)和下降速率期(FRP)计算的。在363 ~ 503 K的温度范围内，观察了不同干燥参数(颗粒半径、气体质量通量、渗透率、孔隙度和操作压力)对干燥过程的影响。一些研究人员已经报道了根据用于计算这一关键参数的干燥时间，反演温度值的显著变化。我们的结果与文献中报道的前模型得到的结果进行了比较。双方达成了很好的协议。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

High Temperatures-high Pressures THERMODYNAMICS-MECHANICS

CiteScore

1.00

自引率

9.10%

发文量

期刊介绍： High Temperatures – High Pressures (HTHP) is an international journal publishing original peer-reviewed papers devoted to experimental and theoretical studies on thermophysical properties of matter, as well as experimental and modelling solutions for applications where control of thermophysical properties is critical, e.g. additive manufacturing. These studies deal with thermodynamic, thermal, and mechanical behaviour of materials, including transport and radiative properties. The journal provides a platform for disseminating knowledge of thermophysical properties, their measurement, their applications, equipment and techniques. HTHP covers the thermophysical properties of gases, liquids, and solids at all temperatures and under all physical conditions, with special emphasis on matter and applications under extreme conditions, e.g. high temperatures and high pressures. Additionally, HTHP publishes authoritative reviews of advances in thermophysics research, critical compilations of existing data, new technology, and industrial applications, plus book reviews.