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微波紅外振動床協(xié)同干燥機設計與試驗
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國家自然科學基金項目(31901823)和中國農業(yè)大學基本科研業(yè)務費專項資金項目(2021TC041)


Design and Experiment of Microwave Infrared Vibrating-bed Dryer
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    摘要:

    針對農產品加工中微波干燥不均和紅外干燥穿透能力有限等技術問題,研制了微波紅外振動床協(xié)同干燥(MIVBD)設備。在結構設計上,通過COMSOL仿真分析諧振腔場強分布的均勻性,并優(yōu)化了微波源饋波口布置。設備通過多孔面板將紅外源與微波諧振腔隔離,在保證紅外熱量高效輻射的同時,確保微波、紅外二者互不干擾。振動系統(tǒng)采用聚苯硫醚等諧振腔內部材料和鋼結構外部材料制成,通過振動電機和橡膠彈簧帶動物料振動。以高含水率生姜片為典型物料,對MIVBD設備的干燥效率、均勻性和色澤等相關品質進行試驗研究,當物料溫度超過上限溫度時微波和紅外停止工作,結果發(fā)現,微波紅外振動干燥比微波紅外干燥時間縮短了14.29%,微波紅外振動干燥時溫度不均勻系數最小(2.28%),并且微波紅外振動干燥顯著降低了干燥能耗,改善了相關品質。

    Abstract:

    In order to solve the problems of uneven drying during microwave drying and limited penetration during infrared drying for agricultural products, a microwave infrared vibrating-bed dryer (MIVBD) was developed. In the structure design, the uniformity of the microwave distribution in the resonator was analyzed by COMSOL, and the arrangement of the microwave source was optimized. The infrared source was isolated from the microwave resonator through the porous panel, which ensured the high efficiency of infrared heat radiation and the non-interference of microwave and infrared. The vibration system was made from polyphenylene sulfide (PPS) and other materials inside the resonant cavity, steel structure materials outside the resonant cavity, and agricultural products vibrate through vibration motor and rubber spring. Fresh ginger slices were selected as experimental materials. The drying efficiency, uniformity, and color of MIVBD were studied. When the material temperature exceeded 60℃, microwave and infrared stopped working. The results showed that the drying efficiency of MIVBD was improved by 14.29%. Infrared radiation and vibration can significantly improve the uniformity of material surface temperature distribution. The temperature uniformity of MIVBD was the best, and its temperature nonuniformity coefficient was 2.28%. The MIVBD significantly reduced the drying energy consumption and improved the related quality. The research result can provide theoretical basis and technical support for the application of microwave and infrared radiation in fruit and vegetable drying.

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宿佃斌,曾詩雨,呂為喬,李棟,趙丹,趙東林.微波紅外振動床協(xié)同干燥機設計與試驗[J].農業(yè)機械學報,2022,53(8):423-434. SU Dianbin, ZENG Shiyu, Lü Weiqiao, LI Dong, ZHAO Dan, ZHAO Donglin. Design and Experiment of Microwave Infrared Vibrating-bed Dryer[J]. Transactions of the Chinese Society for Agricultural Machinery,2022,53(8):423-434.

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  • 收稿日期:2021-09-03
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  • 在線發(fā)布日期: 2021-10-26
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