Zhongguo youzhi (Jul 2023)

基于EDEM的翻板冷却器布料器 布料效果的离散元仿真优化Discrete element simulation optimization of the distribution effect of the distributor of the flap cooler based on EDEM

  • 李庚1，薛亚南1，黄永娜1，申燕2，张京明3，林凤岩2，王伟2，郑峰2LI Geng1, XUE Yanan1, HUANG Yongna1, SHEN Yan2, ZHANG Jingming3, LIN Fengyan2, WANG Wei2, ZHENG Feng2

DOI
https://doi.org/10.19902/j.cnki.zgyz.1003-7969.220826
Journal volume & issue
Vol. 48, no. 7
pp. 143 – 148

Abstract

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翻板冷却器是一种采用逆流冷却原理的立式冷却设备。为解决翻板冷却器布料不均的问题，更好地适应多形态、多物状的物料，基于EDEM软件，针对以大豆颗粒为代表的颗粒料和以大豆低温粕为代表的粕粉料，对翻板冷却器布料器的布料情况进行了离散元仿真。通过中心组合试验回归分析的方法，以颗粒分布离散率为响应值，对撒料盘与铅锤面的倾斜夹角（简称“撒料倾角”）和转轴转速进行了优化，并将优化结果应用于检疫性大豆灭活工艺冷却工段的翻板冷却器布料器。结果表明：物料类型为以大豆颗粒为代表的颗粒料时，撒料倾角为53.59°、转轴转速为45.91 r/min时布料效果最优，颗粒分布离散率为2.44%；物料类型为以大豆低温粕为代表的粕粉料时，撒料倾角为49.02°、转轴转速为46.45 r/min时布料效果最优，颗粒分布离散率为2.99%。实际工程应用结果表明，大豆颗粒布料总体均匀，冷却情况较好。综上，基于EDEM对翻板冷却器布料器的布料效果进行优化具有可行性和有效性。 Flap cooler is a kind of vertical cooling equipment based on counter current cooling principle.To solve the problem of uneven distribution of materials in the flap cooler and better adapt to materials with multiple forms and shapes, based on EDEM, discrete element simulation was conducted on the distribution of the distributor of the flap cooler for granular materials represented by soybean particles and meal powder materials represented by soybean low-temperature meal.Through the method of regression analysis through central combination experiments, the distribution dispersion rate was used as the response value to optimize the inclination angle (referred to as the inclination angle between the sprinkling tray and the lead hammer surface), as well as the rotational speed of the shaft.The optimization results were applied to the distributor of the flap cooler in the cooling section of the quarantine soybean inactivation process.The results showed that when the material type was represented by soybean particles, the optimal distribution effect was achieved when the inclination angle was 53.59° and the rotational speed of the shaft was 45.91 r/min, with a distribution dispersion rate of 244%; when the material type was represented by soybean low-temperature meal, the optimal distribution effect was achieved when the inclination angle was 49.02° and the rotational speed was 46.45 r/min, with a distribution dispersion rate of 2.99%.The actual engineering application results showed that the soybean particle distribution was generally uniform and had good cooling performance.In summary, it is feasible and effective to optimize the distribution effect of the distributor for the flap cooler based on EDEM.

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