CHEN, SU DER,陈淑德,陳淑德,LIN, JI HAN,林季函,林季函,SIN, PIE LIN,辛佩琳,辛珮琳
申请号：
TW106101757
公开号：
TW201826943A
申请日:
2017.01.19
申请国别(地区):
TW
年份:
2018
代理人:
摘要：
The harvested wet paddy rice can be rapidly and uniformly heated by radio frequency (RF) and the evaporated water vapor can be blown away by hot air therefore, it can overcome the heat and mass transfer resistance during hot air drying. It can rapidly prepare parboiled rice, which can enhance the nutrition, decrease cracking ratio during milling and reduce mold and pest problems during storage. The moisture content of wet paddy rice is about 22 ~ 33%, and it must be dried to lower than 15% for storage otherwise, it is easily to germinate and spoilage. The rate of RF drying is affected by the rice loading and the RF electrode gap. For example, the RF-hot air drying rate of 4 kg wet paddy rice is more than 73 g / min to complete drying within 10 min. The final temperature of rice is up to 110 ℃ to achieve the effect of parboiled rice by steam pre-cooking. The RF-hot air drying only requires 1.60 kWh power consumption and the rice can be stored after cooling. In general, the preparation of parboiled rice usually has three processing: immersion, higher than 100℃ steam cooking, and a final hot air drying. Therefore, it is a time and energy consumption processing. Compared with the normal hot air drying of milled rice, the milled rice by RF-hot air drying had yellow color due to the rice bran layer of nutrition, so its antioxidant activity is almost equal to brown rice, and significantly higher than rice by hot air drying. Moreover, the cracking ratio is much lower and the yield is much higher during milling the RF-hot air dried paddy rice. The RF-hot air dried rice has higher amylose content due to starch gelatinization and is very easy to cook. Therefore, the RF-hot air drying can be applied to rapid drying of wet paddy rice and prepare of parboiled rice.利用射頻快速均勻加熱濕稻穀,並配合熱風吹散蒸發的水蒸氣,此可克服熱風乾燥之熱傳和質傳阻力。此亦可快速製備預煮米,達到強化營養、減少碾米時破損率和減少儲藏期間發黴和蟲害之問題。因為稻穀剛收割時之水分含量約為20~35%,容易發芽及腐敗,必需乾燥於15%以下,以利貯藏。稻米裝載量和射頻電極板間距均會影響射頻熱風乾燥的速率,以4kg的濕稻穀為例,射頻乾燥速率可達73.6g/min以上,10min內即可完成乾燥,且最終溫度高達110℃以上,已
