Development of Prototype of Far-infrared Radiation Grain Dryer Modified from a Recirculated Batch Dryer

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  • 循環式乾燥機を改良した穀物遠赤外線乾燥機の量産試作機の開発
  • ジュンカンシキ カンソウキ オ カイリョウ シタ コクモツエンセキガイセン カンソウキ ノ リョウサン シサクキ ノ カイハツ

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Abstract

We developed a prototype of far-infrared radiation (FIR) grain dryer for practical use. This dryer was modified from a recirculating batch type heated air (HA) dryer. This dryer converted thermal energy into FIR by heating an FIR body with a kerosene burner. Exhaust air was reused to increase energy efficiency. The heat balance was an average of 48 % radiation based on a heated FIR body examination. The central wavelength of the FIR was 4.8 to 5.1 μm. <br> We designed and constructed three FIR prototype dryers in which the FIR body was installed in a) the tempering tank, b) the drying chamber and c) the space of between the rotary valve and under auger. Results of drying tests for rough rice and wheat indicated drying efficiency was good and quality of grain was satisfactory. We found the best adjustments for the FIR grain dryer air flow rate and weight of circulating grain per hour.<br> We finally adopted of the drying chamber and the space of between the rotary valve and under auger for installing the FIR body in commercial products.

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