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傾斜料盤式氣體射流沖擊干燥機(jī)設(shè)計與試驗
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國家自然科學(xué)基金資助項目(31201436)


Design and Experiment of Tilted Tray Air-impingement Dryer
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    摘要:

    針對平板式氣體射流沖擊裝置存在的裝料量小、干燥不均勻、干燥結(jié)殼等問題,設(shè)計了一種傾斜料盤式氣體射流沖擊干燥機(jī)。該干燥機(jī)由傾斜料盤車、干燥室、熱空氣循環(huán)利用系統(tǒng)、干燥加濕和控制系統(tǒng)等組成,干燥過程中可根據(jù)不同物料的干燥特性,對料盤托架傾角、料盤距噴嘴間距、噴嘴排列間距等結(jié)構(gòu)參數(shù)和干燥室內(nèi)氣流溫度、濕度、風(fēng)速等工藝參數(shù)在一定范圍內(nèi)進(jìn)行調(diào)節(jié)。以哈密瓜片為試驗物料進(jìn)行了性能試驗,滿裝載量相比傳統(tǒng)射流沖擊裝置提高了1.7倍,而干燥時間縮短了11.1%,干燥機(jī)的處理能力相對于后者提高了3.65倍,單位能耗降低了67.9%,且干燥均勻系數(shù)達(dá)0.97,干燥后的成品色澤褐變及收縮程度更小。所設(shè)計干燥機(jī)提高了氣體射流沖擊干燥裝置的裝載量,確保了干燥過程的均勻性,改善了干后品質(zhì)。

    Abstract:

    In order to solve the problems of conventional air-impingement dryer such as small loading capacity, no uniformity of drying and crustation, a tilted tray air-impingement dryer was designed. This apparatus was composed of tilted tray skip, drying chamber, hot air recycling system, humidifying system and control system. The technological and structural parameters of the dryer, for instance, drying temperature, absolute humidity, airflow velocity, inclination angle, separation distance and nozzle arrangement can be adjusted according to different material properties and products requirement. The experimental results of Hami melon slices demonstrated that the drying uniformity coefficient can reach to 0.97. The carrying capacity and the dehydration intensity of the dryer were increased by 1.7 times and 3.65 times, respectively, compared with the conventional air-impingement dryer at the same temperature. And the drying time was shortened by 11.1% at the same time. The unit energy consumption of Hami melon slices treated by tilted tray air-impingement dryer was about 67.9% lower than that by the conventional way. Both the browning degree and shrinkage level were better than that of the latter. This research improves the loading capacity and adaptability of materials, which provide significance in enlarging applied range of air-impingement technology.

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代建武,肖紅偉,謝 龍,王 棟,李曉明,高振江.傾斜料盤式氣體射流沖擊干燥機(jī)設(shè)計與試驗[J].農(nóng)業(yè)機(jī)械學(xué)報,2015,46(7):238-244. Dai Jianwu, Xiao Hongwei, Xie Long, Wang Dong, Li Xiaoming, Gao Zhenjiang. Design and Experiment of Tilted Tray Air-impingement Dryer[J]. Transactions of the Chinese Society for Agricultural Machinery,2015,46(7):238-244.

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  • 收稿日期:2014-11-06
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  • 在線發(fā)布日期: 2015-07-10
  • 出版日期: 2015-07-10
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