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首页> 外文期刊>配管·装置·プラント技術 >Varietal differences in drying rate and fissure occurrence in heated air drying of rough rice
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Varietal differences in drying rate and fissure occurrence in heated air drying of rough rice

机译：粗米的热风干燥中干燥速率和裂隙出现的品种差异

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摘要

Drying rate is the common index of drying ability for a continuous flow grain dryer. In developing this dryer, manufacturers in Japan conventionally apply a standard drying rate at which the upper 30o limit for heavy fissure occurrence in heated air drying of rough rice is not exceeded. Until now the allowable upper limit for drying rate has been 0.8%/h. Recently, however, a certain manufacturer cofflmereia1ized a new dryer with a claim that the rate was doubled to 1.6%/h. Hence the authors carried out basic single-grain layer drying experiments to investigate its possibility. Results showed that varietal differences in fissure resistance were unexpectedly great. Of the five varieties used in the study, Yaeminori was the weakest, with many light fissures occurring even in natural shade drying. Koshihikari was the strongest among the medium grain varieties used since in drying it at a rate of 3.6%/h at 48℃, the 3% heavy fissure limit was not exceeded. In applying this result to practical deep-bed drying, the intended 1.6%/h rate could possibly be realized. For Hitomebore and Tsugaruroman the upper limits to which the rate could be raised were 1.2 and 1.5%/h, respectively. The long grain IR-64 remarkably showed the highest fissure resistance and for this variety the standard rate may easily be doubled.
机译：干燥速率是连续流谷物干燥机干燥能力的通用指标。在开发这种干燥机时，日本的制造商通常采用标准的干燥速率，在该速率下，糙米的加热干燥中发生严重裂缝的上限不超过30o。迄今为止，干燥速度的允许上限为0.8％/ h。然而，最近，某制造商对一种新的干燥机进行了修改，声称该速度增加了一倍，达到1.6％/ h。因此，作者进行了基本的单粒层干燥实验以研究其可能性。结果表明，抗裂性的品种差异出乎意料地大。在研究中使用的五个品种中，八重盛是最弱的，即使在自然的阴凉干燥下也会出现许多裂痕。越光是使用的中粒品种中最强的，因为在48℃下以3.6％/ h的速度干燥时，未超过3％的重裂极限。将这一结果应用于实际的深床干燥中，可以实现预期的1.6％/ h的速率。对于Hitomebore和Tsugaruroman，可以将速率提高到的上限分别为1.2％和1.5％/ h。长粒IR-64表现出最高的抗裂性，对于这种品种，标准率很容易加倍。

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