中国塑料 ›› 2022, Vol. 36 ›› Issue (4): 149-157.DOI: 10.19491/j.issn.1001-9278.2022.04.022

• 机械与模具 • 上一篇    下一篇

热风熔融废旧塑料造粒机熔融室温度场分析

谭磊, 黄兴元(), 王涵, 潘留雯   

  1. 南昌大学机电工程学院,江西省轻质高强结构材料重点实验室,南昌 330031
  • 收稿日期:2021-10-22 出版日期:2022-04-26 发布日期:2022-04-24
  • 通讯作者: 黄兴元,男,教授,主要从事聚合物成型理论与装备研究,huangxingyuan001@126.com
    E-mail:huangxingyuan001@126.com
  • 基金资助:
    国家自然科学基金项目(51403615)

Analysis of temperature field in melting chamber of hot⁃air melting waste plastic granulator

TAN Lei, HUANG Xingyuan(), WANG Han, PAN Liuwen   

  1. Jiangxi Province Key Laboratory of Lightweight and High?strength Structural Materials,School of Mechanical and Electrical Engineering,Nanchang University,Nanchang 330031,China
  • Received:2021-10-22 Online:2022-04-26 Published:2022-04-24
  • Contact: HUANG Xingyuan E-mail:huangxingyuan001@126.com

摘要:

针对熔融室温度分布存在较大温差现象,用Fluent仿真软件对热风熔融废旧塑料造粒机熔融室进行传热模拟。通过比较不同进风口直径、不同进风口位置及不同进风口风速的熔融室温度分布,分析进风口直径、进风口位置、进风口风速对熔融室温度分布的影响,并采用正交试验找出最佳参数组和分辨主次因素。结果表明,使用控制变量法,熔融室箱体内温度随着进风口直径的增大而显著提高,随进风口位置变化有不同变化,即进风口与主轴距离过小或过大均使熔融室温度分布不均匀,唯有处于中间区域,熔融室温度分布更加均匀,随进风口速度的增大而无明显变化;通过正交试验得到最佳参数组为进风口直径120 mm、进风口距中心150 mm、进风口风速2 m/s、熔融室温度差47.7 ℃;为使熔融室箱体内不出现较大温差,使用进风口直径为120 mm、进风口距中心为150 mm的优化方案。

关键词: 废旧塑料, 熔融室, Fluent, 控制变量法, 温度场, 正交试验

Abstract:

In view of a large temperature difference in the temperature distribution of the melting chamber, the heat transfer in the melting chamber of a hot?air melting waste plastic granulator was simulated by using the Fluent simulation software. By comparing the temperature distribution of the melting chamber with different inlet diameters, different inlet positions, and different inlet wind speed, the effects of inlet diameter, inlet position, and inlet wind speed on the temperature distribution of the melting chamber were investigated. An orthogonal experiment was performed to explore the optimal parameter components and distinguish the primary and secondary factors. The analysis results indicated that the temperature inside the melting chamber increased significantly with an increase in the diameter of the air inlet increases when using the controlled variable method. However, this temperature varied with a variation of the position of the air inlet. If the distance between the air inlet and the main shaft was too small or too large, the temperature distribution of the melting chamber was inhomogeneous. Only in the middle area, the temperature distribution of the melting chamber was more uniform, and there was no obvious change with an increase in the air inlet speed. Through the orthogonal experiment, the optimal parameter group was determined to be an air?inlet diameter of 120 mm, a distance of 47.7 ℃ between the air inlet and center 150 mm, and a wind speed of 2 m/s at the air inlet. It is concluded that the optimized scheme with an air?inlet diameter of 120 mm and an air inlet distance of 150 mm from the center should be adopted to avoid a large temperature difference in the melting chamber.

Key words: waste plastic, melting chamber, Fluent, controlled variable method, temperature field, orthogonal test

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