基于伴热优化的物料结壁缓解技术的研究与应用

降低伴热介质与被伴热介质之间的热阻是提高外伴管伴热系统抑制物料结壁效果的关键。利用自建的对比传热试验装置,进行了蒸汽和热水伴热传热动态特性试验,结果表明优化后传热系数可提高7倍以上,此时提高伴热热水流量可明显增强伴热能力。将该优化措施应用于发生闪蒸的对苯二甲酸母液罐及附属管道,结果表明设备和管道的壁面温度及其均匀性得到了显著提高,物料结壁减缓。

Study of material attachment alleviating technology based on heat tracing optimization and its application

For improving the performance of material attachment alleviation by external pipe heat tracing system,it is the key factor to reduce the thermal resistance between tracing medium and traced material.With the experimental equipment established by the authors,dynamic characteristics of heat tracing with steam and hot water were investigated.The result indicated that,after optimized by heat transfer cement,the heat transfer coefficient between tracing medium and traced material could be increased by more than seven times and heat tracing capability could be obviously raised at a larger mass flow rate of tracing water.The optimization was then applied in the mother liquid evaporation tank and the attached pipe in PTA unit.It was shown that wall temperatures of the tank and the pipe were obviously raised and their uniformity as well,resulting in lower material attachment rate.