关键词: 造粒模板, 温度场, 流场, 数值模拟

Abstract:

The granulation template is one of the main parts of the granulation system. The internal graining template includes the heating channel and the material channel， and the internal flow media in the channel are thermal oil and polyethylene respectively. In this paper， we explored the uniformity of material extrusion velocity and particle size zone temperature distribution in the case of 0.01 m/s， 0.05 m/s， and 0.1 m/s when other conditions are consistent. The effect of the flow heat transmission process of thermal oil on the temperature and flow fields of the granulation template were investigated. The SolidWorks software was used to model the granulation template in a 3D form， and the ANSYS software was used to numerically simulate the flow and heat transmission of polymer and thermal oil. The temperature and fluid flow field distributions of the granulation template were obtained. The results indicated that the import speed of thermal oil generated a significant effect on the temperature field of the granulation template. The import speeds of thermal oil were 0.01 m/s， 0.05 m/s and 0.1m/s under the three conditions， and the extrusion speed of the material did not show a significant change. Moreover， the temperature differences of the granulation belt were 14.08 ℃， 7.14 ℃， and 5.39 ℃. The granulation belt exhibited the most uniform temperature distribution at 0.1 m/s for the thermal oil entrance.

Key words: granulation template, temperature field, flow field, numerical simulation