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香蕉低壓過熱蒸汽-真空組合干燥研究
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廣東省重點領(lǐng)域研發(fā)計劃項目(2018B020241003)


rying of Banana Using Combined Low-pressure Superheated Steam and Vacuum Drying
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    摘要:

    針對低壓過熱蒸汽干燥香蕉時高干燥速率與高品質(zhì)難以同時保證的問題,,提出了低壓過熱蒸汽-真空組合干燥方法,,以提高干燥速率、降低物料溫度,,實現(xiàn)提高產(chǎn)品品質(zhì)的目的,。通過第一降速階段和全階段計算的香蕉逆轉(zhuǎn)點溫度分別為88.75℃和89.06℃。在高于逆轉(zhuǎn)點的90℃進(jìn)行低壓過熱蒸汽-真空組合干燥研究,,結(jié)果表明:低壓過熱蒸汽-真空組合干燥香蕉最高溫度比低壓過熱蒸汽干燥降低8.5℃,,干燥時間比真空干燥降低30min。相比低壓過熱蒸汽干燥和真空干燥,,第1次斷裂衰減量分別下降了7.37%和36.03%,,峰個數(shù)分別增加了38.27%和41.77%,香蕉干制品的脆性及脆性層次感增強(qiáng),,干制品的孔隙結(jié)構(gòu)豐富,。組合干燥的維生素C保留率達(dá)到67.9%,比低壓過熱蒸汽干燥和真空干燥分別提高了255%和191%,。

    Abstract:

    Aiming at the problem that it is difficult to guarantee higher drying rate and the quality of banana dried by low-pressure superheated steam. A method of combined low-pressure superheated steam and vacuum drying was proposed to increase the drying rate and reduce the temperature of banana to improve the product quality. The inversion temperatures of banana investigated by the falling rate period and the whole drying period were 88.75℃ and 89.06℃, respectively. The drying kinetics and product quality were studied at 90℃ for combined low-pressure superheated steam and vacuum drying. The results showed that the maximum temperature of samples of combined low-pressure superheated steam and vacuum drying was 8.5℃ lower than that of low-pressure superheated steam drying and the drying time was 30min lower than that of vacuum drying. Compared with low-pressure superheated steam drying and vacuum drying, the number of peaks was increased by 38.27% and 41.77%, and the first fracture attenuation was reduced by 7.37% and 36.03%, respectively. Therefore, the crispness of dried banana slices of combined low-pressure superheated steam and vacuum drying was enhanced. In addition, the pore structure of dried banana slices was rich. The color quality of combined low-pressure superheated steam and vacuum drying was better than that of low-pressure superheated steam drying and vacuum drying. The VC retention was 67.9%, which was increased by 255% and 191% respectively than thta of low-pressure superheated steam drying and vacuum drying.

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王瑞芳,王竟成,趙東海,徐慶,肖波,呂黃珍.香蕉低壓過熱蒸汽-真空組合干燥研究[J].農(nóng)業(yè)機(jī)械學(xué)報,2022,53(3):392-399. WANG Ruifang, WANG Jingcheng, ZHAO Donghai, XU Qing, XIAO Bo, Lü Huangzhen. rying of Banana Using Combined Low-pressure Superheated Steam and Vacuum Drying[J]. Transactions of the Chinese Society for Agricultural Machinery,2022,53(3):392-399.

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  • 收稿日期:2021-02-06
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  • 在線發(fā)布日期: 2022-03-10
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