Su Tianxi, Ma Yongzhi, Wang Baolin, Luan Xiaowen, Li Hui, Zhang Xuelong
College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China.
Qingdao Wanfang Recycling Technology Co., Ltd., Qingdao 266071, China.
Polymers (Basel). 2025 Jan 17;17(2):232. doi: 10.3390/polym17020232.
Currently, in the domestic practice of retreading tires using vulcanization tanks, some tanks exhibit uneven temperature distributions leading to low retreading success rates. To address that, this paper simulated the temperature and velocity fields during the heating process of vulcanization tanks for waste tire retreading. The results indicated that a higher heating power reduces the time required for the vulcanizing agent to reach the vulcanization condition, but it also increases the difference in tire temperature in the tank, with a severely uneven distribution of the temperature field. Subsequently, to improve the uniformity of temperature distribution and enhance the retreading rate of waste tires, this paper proposed two types of orifice plates to adjust the airflow organization. The results show that both the plain orifice plate and the frustum cone orifice plate can enhance the uniformity of the temperature field within the vulcanization tank and reduce the temperature difference between tires. Moreover, at the same heating power, the presence of the orifice plates increases the rate of temperature increase in the tires and the vulcanizing agent compared to the original vulcanization tank, improving the thermal efficiency of the vulcanization tank heater.
目前，在国内利用硫化罐翻新轮胎的实际操作中，一些硫化罐存在温度分布不均的情况，导致翻新成功率较低。为解决这一问题，本文对废旧轮胎翻新硫化罐加热过程中的温度场和速度场进行了模拟。结果表明，较高的加热功率虽能缩短硫化剂达到硫化条件所需的时间，但也会增大罐内轮胎的温度差异，使温度场分布严重不均。随后，为提高温度分布的均匀性并提高废旧轮胎的翻新率，本文提出了两种孔板来调节气流组织。结果表明，平板孔板和截头圆锥孔板都能提高硫化罐内温度场的均匀性，减小轮胎之间的温差。此外，在相同加热功率下，与原硫化罐相比，孔板的存在提高了轮胎和硫化剂的升温速率，提高了硫化罐加热器的热效率。
