Effects of Air Temperature and Humidity on the Kinetics of Sludge Drying at Low Temperatures

In this study, a low-air temperature sludge drying system was constructed and the effects of temperature and relative humidity on the characteristics of the system were investigated. The results showed that the drying rate of sludge increased with an increase in air temperature and a decrease in the...

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Autores principales:	Zhenyu Wang, Lin Xu, Dong Liu, Qing Zhang, Anjie Hu, Ruheng Wang, Yongcan Chen
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	sludge drying characteristics relative humidity temperature Technology T
Acceso en línea:	https://doaj.org/article/36088817e398479d92f61bbe849facf7
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spelling	oai:doaj.org-article:36088817e398479d92f61bbe849facf72021-11-25T17:28:15ZEffects of Air Temperature and Humidity on the Kinetics of Sludge Drying at Low Temperatures10.3390/en142277221996-1073https://doaj.org/article/36088817e398479d92f61bbe849facf72021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/22/7722https://doaj.org/toc/1996-1073In this study, a low-air temperature sludge drying system was constructed and the effects of temperature and relative humidity on the characteristics of the system were investigated. The results showed that the drying rate of sludge increased with an increase in air temperature and a decrease in the air’s relative humidity. The influence of temperature on the average drying rate exhibited an approximate quadratic distribution, while the influence of relative humidity on the average drying rate exhibited an almost linear distribution. The relationship equations of the average drying rate, temperature, and humidity were summarized and compared with the experimental results, and the maximum relative error was 7.6375%. By comparing the experimental results with the commonly used thin-layer drying models, it was found that the sludge drying characteristics were more consistent with the Midilli model. Based on the relevant parameters of the Midilli model, the relationship between the segmented drying moisture content and the average drying rate was proposed, and the empirical formula of the drying rate and MR under different conditions was fitted.Zhenyu WangLin XuDong LiuQing ZhangAnjie HuRuheng WangYongcan ChenMDPI AGarticlesludgedrying characteristicsrelative humiditytemperatureTechnologyTENEnergies, Vol 14, Iss 7722, p 7722 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	sludge drying characteristics relative humidity temperature Technology T
spellingShingle	sludge drying characteristics relative humidity temperature Technology T Zhenyu Wang Lin Xu Dong Liu Qing Zhang Anjie Hu Ruheng Wang Yongcan Chen Effects of Air Temperature and Humidity on the Kinetics of Sludge Drying at Low Temperatures
description	In this study, a low-air temperature sludge drying system was constructed and the effects of temperature and relative humidity on the characteristics of the system were investigated. The results showed that the drying rate of sludge increased with an increase in air temperature and a decrease in the air’s relative humidity. The influence of temperature on the average drying rate exhibited an approximate quadratic distribution, while the influence of relative humidity on the average drying rate exhibited an almost linear distribution. The relationship equations of the average drying rate, temperature, and humidity were summarized and compared with the experimental results, and the maximum relative error was 7.6375%. By comparing the experimental results with the commonly used thin-layer drying models, it was found that the sludge drying characteristics were more consistent with the Midilli model. Based on the relevant parameters of the Midilli model, the relationship between the segmented drying moisture content and the average drying rate was proposed, and the empirical formula of the drying rate and MR under different conditions was fitted.
format	article
author	Zhenyu Wang Lin Xu Dong Liu Qing Zhang Anjie Hu Ruheng Wang Yongcan Chen
author_facet	Zhenyu Wang Lin Xu Dong Liu Qing Zhang Anjie Hu Ruheng Wang Yongcan Chen
author_sort	Zhenyu Wang
title	Effects of Air Temperature and Humidity on the Kinetics of Sludge Drying at Low Temperatures
title_short	Effects of Air Temperature and Humidity on the Kinetics of Sludge Drying at Low Temperatures
title_full	Effects of Air Temperature and Humidity on the Kinetics of Sludge Drying at Low Temperatures
title_fullStr	Effects of Air Temperature and Humidity on the Kinetics of Sludge Drying at Low Temperatures
title_full_unstemmed	Effects of Air Temperature and Humidity on the Kinetics of Sludge Drying at Low Temperatures
title_sort	effects of air temperature and humidity on the kinetics of sludge drying at low temperatures
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/36088817e398479d92f61bbe849facf7
work_keys_str_mv	AT zhenyuwang effectsofairtemperatureandhumidityonthekineticsofsludgedryingatlowtemperatures AT linxu effectsofairtemperatureandhumidityonthekineticsofsludgedryingatlowtemperatures AT dongliu effectsofairtemperatureandhumidityonthekineticsofsludgedryingatlowtemperatures AT qingzhang effectsofairtemperatureandhumidityonthekineticsofsludgedryingatlowtemperatures AT anjiehu effectsofairtemperatureandhumidityonthekineticsofsludgedryingatlowtemperatures AT ruhengwang effectsofairtemperatureandhumidityonthekineticsofsludgedryingatlowtemperatures AT yongcanchen effectsofairtemperatureandhumidityonthekineticsofsludgedryingatlowtemperatures
_version_	1718412276844724224

Effects of Air Temperature and Humidity on the Kinetics of Sludge Drying at Low Temperatures

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