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垂直下降管散體顆粒換熱實驗臺設(shè)計與應(yīng)用
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    摘要:

    為研究陶瓷球固體熱載體與生物質(zhì)粉顆粒及空氣的換熱機理,，設(shè)計了一種分離式垂直下降管顆粒換熱實驗裝置,，該裝置可以進行陶瓷球和生物質(zhì)粉2種流動特性完全不同的散體顆粒的換熱實驗研究,。喂料實驗表明：陶瓷球和生物質(zhì)顆粒下料均勻可調(diào),、分離完全,。根據(jù)90℃陶瓷球與室溫空氣換熱實驗數(shù)據(jù),，分析計算出陶瓷球與空氣的對流換熱系數(shù)為291.3W/(m2?K),；以陶瓷球質(zhì)量流量為1.0,、1.2,、1.4kg/min,，陶瓷球與生物質(zhì)粉質(zhì)量比為15、20,、25進行的顆粒換熱實驗結(jié)果表明,，隨陶瓷球流量、陶瓷球與生物質(zhì)粉質(zhì)量比的增大生物質(zhì)粉升溫增大,。

    Abstract:

    In order to investigate the heat exchange mechanism between the ceramic balls heat carrier, biomass particles and air, a downward vertical flow tube of particles separation apparatus was developed and the heat exchange experiments with ceramic balls heat carrier and biomass particles can be conducted with the apparatus. The feeding experiments of particles showed that the feeding rate of the ceramic balls and the biomass particles were stable and these two kinds of particles were separated completely. Based on the data obtained from the heat exchange experiments among the ceramic balls at 90℃ and the air at room temperature, the convective heat exchange coefficient between the ceramic balls and the air was worked out and the value was about 291.3W/(m2?K). The heat transfer experiments of ceramic balls and biomass particles at the condition of ceramic balls’ mass flow rate were 1.0,1.2 and 1.4kg/min, mass ratio of ceramic balls and biomass particles were 15,，20 and 25 respectively. The results indicate that the temperature variation of the biomass particles increases with the increase of ceramic balls mass flow rate and the mass ratio of ceramic balls and biomass particles.

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李志合,劉煥衛(wèi),高巧春,易維明.垂直下降管散體顆粒換熱實驗臺設(shè)計與應(yīng)用[J].農(nóng)業(yè)機械學(xué)報,2009,40(1):100-104.[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(1):100-104.

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