氯化铈液滴在喷雾焙烧反应器热解过程的数值模拟研究
Numerical simulation of cerium chloride droplet pyrolysis in a spray roasting reactor
伍永福 1张松松 1王振峰 2董云芳 2刘中兴 2刘玉宝3
作者信息
- 1. 内蒙古科技大学能源与环境学院,内蒙古 包头 014010
- 2. 内蒙古科技大学材料与冶金学院,内蒙古 包头 014010
- 3. 包头稀土研究所白云鄂博稀土资源研究与综合利用国家重点实验室,内蒙古 包头 014030
- 折叠
摘要
Ruthner型喷雾焙烧反应器具有节能、环保和副产物可回收利用等诸多优点,其已被广泛应用于回收钢铁工业酸洗液,但在CeO2颗粒制备领域还没有应用.当前对实心球形CeO2颗粒的需求不断扩大,使得应用Ruthner型喷雾焙烧反应器规模化生产CeO2 颗粒具有诱人的前景.由于焙烧反应过程难以通过试验表征,使用ANSYS Fluent仿真软件对焙烧反应过程进行仿真模拟,可直观表现出CeCl3 热解生成CeO2颗粒的过程.本研究首先通过热重试验,验证了铁元素的氯化物和铈元素的氯化物的热解过程完全一致,只是温度不同:CeCl3液滴在200℃时完全失去自由水,在 500℃时完全反应;FeCl2 液滴在180℃完全失去自由水,在420℃时完全反应;FeCl3液滴在160℃完全失去自由水,在410℃时完全反应,因此使用处理酸洗液的反应器生产CeO2 颗粒理论上可行.进一步,通过使用仿真软件包中的两相流、组分输运等模型,探究反应器内温度场、速度场和浓度场等分布,结果表明在反应器内部,某区域内温度越高,对应的气流、颗粒运动速度就越快.
Abstract
At present,the Ruthner type spray roasting reactor has been widely used in the process of recovering acid washing liquid in iron and steel industry.At present,the demand for solid spherical CeO2 particles is constantly expanding,which makes the large-scale production of CeO2 particles with the Ruthner type spray roasting reactor attractive prospect.Since the roasting reaction process is difficult to be characterized by experiment,using ANSYS Fluent simulation software to simulate the roasting reaction process,the process of CeO2 particles generated by CeCl3 pyrolysis can be intuitively displayed.In this study,thermogravimetric experiments were performed to verify that the pyrolysis processes of iron chlorides and cerium chlorides were identical,but the temperature was different:CeCl3 droplet completely lost free water at 200℃,and completely reacted at 500℃.FeCl2 drops completely lose free water at 180℃,and react completely at 420℃.FeCl3 droplets completely lose free water at 160℃,and react completely at 410℃,so it is theoretically feasible to produce CeO2 particles using a reactor that treats acid wash.Further,the distribution of temperature field,velocity field and concentration field in the reactor was explored by using the two-phase flow and component transport models in the simulation software package.The results showed that the higher the temperature in a certain region,the faster the corresponding air flow and particle movement velocity.
关键词
氯化铈/Ruthner型喷雾焙烧反应器/数值模拟/喷雾热解/热解过程Key words
cerium chloride/ruthner type spray roasting reactor/numerical simulation/spray pyrolysis/pyrolysis process引用本文复制引用
基金项目
国家自然科学基金(51964039)
内蒙古自治区自然科学基金(2022LHMS05004)
内蒙古自治区自然科学基金(2021GG0103)
白云鄂博稀土资源研究与综合利用国家重点实验室开放基金(2021H2275)
出版年
2024
NETL
NSTL
万方数据