回转煅烧炉内高放废液的流动与传热仿真研究

Simulation study on flow and heat transfer of high-level liquid waste waterin rotary calciner

回转煅烧炉作为第四代玻璃固化技术的关键设备,其主要功能是通过煅烧将高放废液转化为氧化物。煅烧温度是煅烧过程中的主要控制参数,直接影响着煅烧产品的质量和回转煅烧炉的性能。针对回转煅烧炉内高放废液的流动与传热,本文建立回转煅烧炉数值仿真模型,模拟高放废液流动、蒸发以及演化的全部过程,并仿真分析了回转煅烧炉转速和坡度对蒸发速率和空间温度分布的影响。为回转煅烧炉的结构设计、温度参数设置、转速设置提供了重要依据。

As a key equipment of the fourth vitrification technology,the mainly functions of the rotary calcination furnace are to convert high-level radioactive waste into oxides through calcination.The calcination temperature is the main control parameter during the calcination process,which directly affects the quality of calcined product and performance of the rotary calcination furnace.This paper established a numerical simulation model for the flow and heat transfer of high-level radioactive waste in a rotary calcination furnace,simulating the entire process of high-level radioactive waste flow,evaporation,and evolution.The influences of rotary calcination furnace speed and slope on evaporation rate and spatial temperature distribution were also analyzed through simulation.Which provides an important basis for the structural design,temperature parameter setting,and speed setting of the rotary calciner.