CAJ | 학술논문

模板是聚丙烯造粒过程中最为关键的设备之一,模板的温度场对切粒质量有重要影响.建立水下切粒模板的三维传热模型,并对该模型进行数值求解,获得模板内部的温度分布.数值结果表明,受导热油加热作用,浅层模板厚度方向剖面的温度分布较为均匀;切粒模板受到冷却水的冷却作用,导致切粒面温度较低;在导热油加热和冷却水冷却共同作用下,切粒面浅层的温度梯度较大.对切粒模板的温度场进行数值模拟和分析,可为模板内部的导热油通道和模孔的设计和优化提供良好的理论支撑.
모판시취병희조립과정중최위관건적설비지일,모판적온도장대절립질량유중요영향.건립수하절립모판적삼유전열모형,병대해모형진행수치구해,획득모판내부적온도분포.수치결과표명,수도열유가열작용,천층모판후도방향부면적온도분포교위균균;절립모판수도냉각수적냉각작용,도치절립면온도교저;재도열유가열화냉각수냉각공동작용하,절립면천층적온도제도교대.대절립모판적온도장진행수치모의화분석,가위모판내부적도열유통도화모공적설계화우화제공량호적이론지탱.
Die is one of the key devices in of polypropylene pelletizing. The temperature filed of the die has an important influence on the quality of pelletizing granules. A three-dimensional model of heat transfer for a die of pelletizing under water is established and solved by numerical simulation to obtain distribution of temperature inside the die. The numerical results show that temperature distribution of profile in different thickness due to heating of heat-conducting oil. Cooling of die results in pelletizing surface with lower temperature. Combined action of heating of heat-conducting oil and cooling of water leads to greater gradient of temperature close to the pelletizing surface. Numerical simulation and analysis of temperature field of pelletizing die can provide good theorical support for design and optimization of heat-conducting oil pipeline and die hole inside the die.