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首页> 外文期刊>Agricultural mechanization in Asia, Africa and Latin America >The Cost of Fluidized-Bed Drying Using a Buffered Salt Layer
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The Cost of Fluidized-Bed Drying Using a Buffered Salt Layer

机译：使用缓冲盐层流化床干燥的成本

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A dryer was fabricated and investigated that was based on the fluid-ized-bed method without using the conventional air distribution shaking screen but with a fixed screen that had a buffered dry salt layer as an alternative to promote the heat and humid exchange process effectively. The finished prototype had a capacity of 200 kg/hour and could be used to dry grain material for food processing and chemical industries. All the experiments were randomly conducted and some critical parameters of the machine were determined by a multi-factor experimental plan. The experimental results helped to establish an equation that represented the dependence of humidity versus the active area of the screen, the height of barrier plate, and the temperature of the drying agent for the drying of pure salt. W_b = 5.05612 - 0.213657φ -8.673737 × 10~(-3) h_c - 0.0292034_t + 8.62965 × 10~(-3) φ~2 + 1.48033 × 10~(-5) h_c~2 + 9.694 × 10~(-5)5t~2......................(1) The experimental results also defined an equation for the dependence of the cost of heating energy versus the active area of the screen, the height of barrier plate, and the temperature of the drying agent for the drying of pure salt. B_r = 3905.5 - 82.5117φ -2.45799h_c - 34.53111 + 0.177083 × φ ×h_c + 2.51969 φ~2 + 7.02027 × 10~(-3) h_c~2 + 0.1181123t~2...........................(2) Through the regression equation, some optimum parameters were determined as follows": 1.For the requirement with a humidity of material of 0.3 %, the heat cost was 882 kJ/kg, equivalent to the active area of the screen of 12.1 %, a height of the barrier plate of 249 mm, and a drying temperature of 142 ℃. 2.For the requirement with a humidity of material of 0.4 %, the heat cost was 846 kJ/kg, equivalent to the active area of the screen of 11.79 %, a height of the barrier plate of 203 mm, and a drying temperature of 139 ℃.
机译：干燥机的制造和研究基于流化床方法，不使用传统的空气分配振动筛，而是使用固定筛，该筛具有缓冲的干盐层作为替代方案，以有效地促进热湿交换过程。成品原型的产能为200公斤/小时，可用于干燥谷物材料，用于食品加工和化学工业。所有实验都是随机进行的，并且通过多因素实验计划确定了机器的一些关键参数。实验结果有助于建立一个方程，该方程表示湿度与筛网有效面积，挡板高度和用于干燥纯盐的干燥剂温度之间的关系。 W_b = 5.05612-0.213657φ-8.673737×10〜（-3）h_c-0.0292034_t + 8.62965×10〜（-3）φ〜2 + 1.48033×10〜（-5）h_c〜2 + 9.694×10〜（- 5）5t〜2 .......................（1）实验结果还定义了加热能量成本与有效面积的关系方程筛网的尺寸，挡板的高度以及用于干燥纯盐的干燥剂的温度。 B_r = 3905.5-82.5117φ-2.45799h_c-34.53111 + 0.177083×φ×h_c + 2.51969φ〜2 + 7.02027×10〜（-3）h_c〜2 + 0.1181123t〜2 ........ ................（2）通过回归方程，确定了一些最佳参数，如下所示：“ 1.对于物料湿度为0.3％的要求，热成本为882 kJ / kg，相当于屏幕的有效面积为12.1％，挡板的高度为249 mm，干燥温度为142℃。2.对于材料湿度为0.4％的要求，热成本为846 kJ / kg，相当于屏幕的有效面积为11.79％，挡板的高度为203 mm，干燥温度为139℃。

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