Drying Characteristics and Quality of Paddy under Low Temperatures and Far-infrared Drying Conditions of Graphene
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摘要: 为研究稻谷的石墨烯低温远红外干燥特性及其对稻谷干燥品质的影响，以辐射温度、排粮流量和除湿风量为影响因素，以整精米率和应力裂纹指数增值为评价指标，用自制的循环式石墨烯低温远红外干燥机进行稻谷干燥试验，通过BBD（Box-Behnken设计）响应面法，分析了低温远红外干燥对稻谷干燥品质的影响以及工艺参数优化。结果表明：影响稻谷干燥特性和品质的最主要因素是辐射温度，其次是排粮流量和除湿风量。随着辐射温度的升高，稻谷干燥速率和应力裂纹指数增值逐步增大，整精米率则逐步降低。与同温度的热风干燥相比，石墨烯低温远红外干燥平均干燥速率和干燥品质均有显著提高。经优化后，稻谷最佳石墨烯低温远红外干燥工艺条件为：辐射温度43℃、排粮流量4 kg/min、除湿风量193 m3/h,此时应力裂纹指数增值为9,整精米率为79.75%,稻谷干燥品质最佳。这说明利用石墨烯低温远红外干燥稻谷，可以明显提高干燥速率并改善稻谷干燥品质。Abstract: In order to study the graphene low temperature far-infrared drying characteristics of paddy and its influence on the drying quality of rice, the IR temperatures, grain flow and dehumidification air volume were used as influencing factors, and the head rice rate and additional stress crack index were used as evaluation indexes. A self-made circulating graphene low temperature far-infrared drying machine was used to carry out paddy drying tests. The effect of low temperature far-infrared drying on paddy drying quality and the optimization of process parameters were analyzed. The results showed that the most important factors affecting the drying characteristics and quality of paddy were IR temperature, followed by grain flow and dehumidifying air volume. With the increase of IR temperature, the drying rate and additional stress crack index of paddy were increased gradually, while the percentage of head rice was decreased gradually. Compared with hot air drying at the same temperature, the average drying rate and drying quality of graphene low temperature far-infrared drying were significantly improved. After optimization, the optimal low temperature far-infrared drying conditions for paddy were as follows: IR temperature was 43℃, grain flow rate was 4 kg/min, dehumidification air volume was 193 m~3/h, stress crack index increment was 9, head rice rate was 79.75%, and paddy drying quality was the best. The results showed that using graphene to dry paddy at low temperature and far-infrared can significantly increase the drying rate and improve the drying quality of paddy.
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Keywords:
- paddy /
- graphene /
- far-infrared radiation drying /
- heat transfer /
- low temperature drying
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[1] ZHOU X,LIU L,FU P,et al.Effects of infrared radiation drying and heat pump drying combined with tempering on the quality of long-grain paddy rice[J].International Journal of Food Science & Technology,2018,53(11):2448-2456.
[2] 姚渠,尹君,李瑞敏.我国粮食干燥技术发展现状与趋势[J].粮食加工,2022,47(3):77-79.YAO Qu,YIN Jun,LI Ruimin.Development status and trend of grain drying technology in China[J].Grain Processing,2022,47(3):77-79.(in Chinese) [3] 徐小东,崔政伟.农产品和食品干燥技术及设备的现状和发展[J].农业机械学报,2005,36(12):171-174.XU Xiaodong,CUI Zhengwei.Present situation and development of drying technology and equipment for agricultural products and food[J].Transactions of the Chinese Society for Agricultural Machinery,2005,36(12):171-174.(in Chinese) [4] JIN Y,WONG W K,WU Z,et al.Relationship between accumulated temperature and quality of paddy[J].International Journal of Food Properties,2019,22(1):19-33.
[5] El-MESERY H S,QENAWY M,HU Z C,et al.Evaluation of infrared drying for okra:mathematical modelling,moisture diffusivity,energy activity and quality attributes[J].Case Studies in Thermal Engineering,2023,50:103451.
[6] HACHEM H,BOUMNIJEL I,MIHOUBI D.Effect of convective and infrared drying on kinetics,activation energy,and quality of eggshells reinforced kaolin composites:comparative study[J].Materials Today Communications,2023,36:106809.
[7] SHAD Z M,VENKITASAMY C,KUELBS E,et al.Effect of infrared drying on chemical and microbial properties of Cold-Hardy grape pomace (Edelweiss and Marquette)[J].Food Science & Nutrition,2023,11(4):1826-1835.
[8] 游香杨,李文智,曾秀权,等.基于红外线的泡沫监测装置的设计[J].信息通信,2017(10):74-75.YOU Xiangyang,LI Wenzhi,ZENG Xiuquan,et al.Design of foam monitoring device based on infrared ray[J].Information & Communications,2017(10):74-75.(in Chinese) [9] 罗剑毅.稻谷的远红外干燥特性和工艺的实验研究[D].杭州:浙江大学,2006.LUO Jianyi.Study on drying charateristic and technology of paddy dried by far-infrared[D].Hangzhou:Zhejiang University,2006.(in Chinese) [10] 姜春慧,张倩,杨娜,等.桔梗切片远红外干燥特性及动力学研究[J].中国农机化学报,2021,42(2):92-100.JIANG Chunhui,ZHANG Qian,YANG Na,et al.Study on far infrared drying characteristics and kinetics of Platycodon grandiflorum slices[J].Journal of Chinese Agricultural Mechanization,2021,42(2):92-100.(in Chinese) [11] 尚建伟,张倩,王同勋,等.远红外干燥对甘草切片干燥特性及品质的影响[J].核农学报,2023,37(8):1609-1617.SHANG Jianwei,ZHANG Qian,WANG Tongxun,et al.Effect of far-infrared drying on drying characteristics and quality of glycyrrhiza slices[J].Journal of Nuclear Agricultural Sciences,2023,37(8):1609-1617.(in Chinese) [12] ZHANG D Y,HUANG D,ZHANG Y X,et al.Ultrasonic assisted far infrared drying characteristics and energy consumption of ginger slices[J].Ultrasonics Sonochemistry,2023,92:106287.
[13] RATSEEWO J,WARREN F J,MEESO N,et al.Effects of far-infrared radiation drying on starch digestibility and the content of bioactive compounds in differently pigmented rice varieties[J].Foods,2022,11(24):4079.
[14] SAKARE P,PRASAD N,THOMBARE N,et al.Infrared drying of food materials:recent advances[J].Food Engineering Reviews,2020,12(3):381-398.
[15] 汪喜波,胡琼,肖波,等.稻谷红外辐射与对流联合干燥过程的模型模拟[J].农业机械学报,2013,44(9):145-151.WANG Xibo,HU Qiong,XIAO Bo,et al.Modeling simulation of combined convective and infrared radiation in rice drying process[J].Transactions of the Chinese Society for Agricultural Machinery,2013,44(9):145-151.(in Chinese) [16] DU Y J,YAN J C,WEI H,et al.Drying kinetics of paddy drying with graphene far-infrared drying equipment at different IR temperatures,radiations-distances,grain-flow,and dehumidifying-velocities[J].Case Studies in Thermal Engineering,2023,43:102780.
[17] 王波.基于石墨烯等离激元的hBN和VO2薄膜结构的近场辐射换热研究[D].烟台:烟台大学,2021.WANG Bo.Research on near-field thermal radiation of hBN and VO2 thin films structure based on graphene plasmons[D].Yantai:Yantai University,2021.(in Chinese) [18] JAIBOON P,PRACHAYAWARAKORN S,DEVA-HASTIN S,et al.Effect of high-temperature fluidized-bed drying on cooking,textural and digestive properties of waxy rice[J].Journal of Food Engineering,2011,105(1):89-97.
[19] UTARI F D,YASINTASIA C,RATRIDEWI M,et al.Evaluation of paddy drying with vertical screw conveyor dryer (VSCD) at different air velocities and temperatures[J].Chemical Engineering and Processing,2022,174:108881.
[20] HUNDAL J,TAKHAR P S.Experimental study on the effect of glass transition on moisture profiles and stress-crack formation during continuous and time-varying drying of maize kernels[J].Biosystems Engineering,2010,106(2):156-165.
[21] MAHMOOD N,LIU Y H,MUNIR Z,et al.Effects of hot air assisted radio frequency drying on heating uniformity,drying characteristics and quality of paddy[J].LWT,2022,158:113131.
[22] 刘启觉.高水分稻谷干燥工艺试验研究[J].农业工程学报,2005,21(2):135-139.LIU Qijue.Experimental research on drying technology for high moisture content paddy[J].Transactions of the CSAE,2005,21(2):135-139.(in Chinese) [23] 郑先哲,刘辉,沈柳杨,等.基于玻璃化转变的稻谷变温热风干燥工艺研究[J].农业机械学报,2020,51(1):331-340.ZHENG Xianzhe,LIU Hui,SHEN Liuyang,et al.Hot-air drying technology of changing temperature for paddy rice based on glass transition theory[J].Transactions of the Chinese Society for Agricultural Machinery,2020,51(1):331-340.(in Chinese)
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