摘要
为了给陶瓷工业浆液干燥过程提供参考,对以高温烟气为热源,带有双层整流板和12个压力雾化喷嘴的陶瓷泥浆喷雾干燥塔进行模拟,对干燥塔的进风结构、雾化器结构、排风结构进行了优化,结果显示,进风结构最优设置是塔头锥角为40°,整流板间距为400 mm,上下层整流板的开孔率分别为0.3040和0.1718;压力雾化喷嘴的相对合理高度是2 m,雾化锥角最优设置是36°;排风结构采用管口正对出料口的弯管形式。通过正交试验分析了入口烟气温度、气浆比、喷雾压力对干燥效果的影响,确定了对于含水量为34%的陶瓷泥浆,最佳操作工况为:入口烟气温度不能低于918.54 K,气浆比不得低于4.61;当入口烟气温度为963 K时,气浆比不得高于4.88;当气浆比为5.235时,入口烟气温度不得高于939.39 K。
In order to provide a reference for the drying process of slurries in the ceramic industry, the ceramic slurry spray drying tower with double rectifier plates and 12 pressure atomizing nozzles was simulated with high-temperature flue gas as the heat source. The inlet structure, atomizer structure and exhaust structure of the drying tower were optimized. The results show that the optimal setting of inlet structure is that the cone angle of the tower head is 40 °, the spacing of rectifier plates is 400 mm, and the opening rates of the upper and lower rectifier plates are 0.3040 and 0.1718, respectively. The relatively reasonable height of pressure atomizing nozzle is 2 m, and the optimal setting of atomizing cone angle is 36 °;The exhaust structure adopts the form of a bent pipe with the mouth facing the outlet. The effects of inlet flue gas temperature, air-slurry ratio and spray pressure on drying effect were analyzed by orthogonal test.The optimum operating conditions for ceramic slurry with 34 % water content were determined as follows:inlet flue gas temperature should not be lower than 918.54 K and air-slurry ratio should not be lower than 4.61;when the inlet flue gas temperature is 963 K, the gas slurry ratio should not be higher than 4.88;when the gas slurry ratio is 5.235, the inlet flue gas temperature should not be higher than 939.39 K.
作者
温俊云
冯俊小
桑琪
樊欢豹
白伟
WEN Junyun;FENG Junxiao;SANG Qi;FAN Huanbao;BAI Wei(University of Science and Technology Beijing,Beijing 100083,China)
出处
《中国陶瓷》
CAS
CSCD
北大核心
2023年第1期48-55,共8页
China Ceramics
基金
国家重点研发计划项目(2017YFC0210303)。
关键词
陶瓷泥浆
喷雾干燥
计算流体力学
多相流
离散相
Ceramic mud
Spray drying
Computational fluid mechanics
Multiphase flow
Discrete phase model
