Analysis on the Heat Efficiency of Hot-Air Drying System

DOI

10.2991/eers-15.2015.3How to use a DOI?

Keywords

drye; conveyor; hot-air drying; thermal efficiency; moisture; mass transfer

Abstract

Conveyor-belt hot-air drying equipment was developed and used in this study to investigate the feasibility of new heat-efficiency-improvement technology. This novel technology reduces the amount of heat generated by the heater in the new hot-air drying furnace. Sludge sample types A and B used in the study were obtained from a city water treatment plant. Samples that had undergone first-stage dehydration were collected frequently during the experimental period. The result from analyzing the total moisture content in the sludge showed that the average total moisture content detected in Type A sludge samples was 35.12% and that in Type B samples was 51.3%. These samples were treated using various temperatures and hot-air supply rates. Evaluation of the drying efficiency of the conveyor-belt hot-air drying system using the Freeman-Carroll method, showed that the drying rate remained constant with temperature and power. Although Type B samples were dried at high temperature, their drying rates were similar to those of Type A samples, which could be dried at lower temperature. This was because of the drying effectiveness of the hot-air as well as the steady temperature inside the dryer equipment.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Sangan Ha
AU  - Dongkyun Kim
AU  - Jeipil Wang
PY  - 2015/09
DA  - 2015/09
TI  - Analysis on the Heat Efficiency of Hot-Air Drying System
BT  - Proceedings of the 2015 International Conference on Environmental Engineering and Remote Sensing
PB  - Atlantis Press
SP  - 9
EP  - 12
SN  - 2352-538X
UR  - https://doi.org/10.2991/eers-15.2015.3
DO  - 10.2991/eers-15.2015.3
ID  - Ha2015/09
ER  -