Experimental study on improving the drying uniformity in hot air cross-flow dryer

2017 International Conference on New Energy and Future Energy System

Bie, Y.^1,2 ; Li, M.^1 ; Guo, X.Y.^2 ; Sun, J.G.^2 ; Qiu, Y.^1

Solar Energy Research Institute, Yunnan Normal University, Kunming

650500, China^1

Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming

650500, China^2

关键词: Deep processing;    Drying efficiency;    Drying equipment;    Experimental research;    Inhomogeneities;    Production practice;    Thermal efficiency;    Wind directions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/93/1/012001/pdf
DOI  :  10.1088/1755-1315/93/1/012001

来源: IOP

【 摘 要 】

Drying is one of the important steps in the deep processing of agricultural and sideline products. It is a main tendency to research and develop the high-efficient and energy-saving drying pattern and technology. However, it is found that drying uneven phenomenon often exists in the material-drying oven in the production practice of hot air flow drying process. In order to explore the causes of the formation of uneven phenomenon, and to propose the ways to eliminate the inhomogeneity, experimental research was conducted concerning a multifunctional drying equipment with the hot air circulation. The temperature distribution uniformity and drying efficiency in the oven were tested under no-loaded and loaded conditions, in aspect of oven tray structure improving, wind direction switching and moisture controlling of exhaust air. Experimental results show that the drying inhomogeneity and thermal efficiency could be improved by the ways of changing the wind direction from cross-flowing to cross-swept-flowing, and as well as proper moisture controlling of exhaust air.