摘要
为了实现低能耗、低污染和高质量节能减排目标,以某厂50 t倾动式铝液保温炉为原型,结合铝液保温炉的运行特征,耦合用户自定义热负荷波动变化及铝液温度控制模型,建立并实现了铝液保温炉运行过程的解析模型,对铝液保温炉特性要因进行热工特性分析和基于偏最小二乘法多元回归分析。结果表明,铝液温度均匀性系数主要受氧化剂类型和熔池深度的影响。氧化剂为空气时,铝液温度均匀性系数较高;增加空气预热温度和提高天然气流速时,铝液温度均匀性系数在加热和保温阶段减小,而在静置阶段增加;随着空燃比的增加,铝液温度均匀性系数在加热和保温阶段增加,而在静置阶段减小;铝液温度均匀性系数随燃烧器倾角和熔池深度增加而增加。
To attain the goal set for low energy consumption, low pollution and high product quality, and emission reduction, based on 50 t tilting-type aluminum holding furnaces from some company, taking in account the features of aluminum holding furnaces, a CFD process model was developed and integrated with user-defined heat load fluctuation and aluminum temperature monitoring model. Thermal characteristics of aluminum holding furnaces were analyzed according to cause and effect diagram. Mathematical representation of thermal characteristics was obtained by partial least squares method. The results show that oxidant type or pool depth significantly affects aluminum temperature uniform coefficient. Aluminum temperature uniform coefficient is high when air is used as oxidant. Increasing air preheated temperature, and raising natural gas velocity, aluminum temperature uniform coefficient reduces firstly during heating and holding phase, and then increases during standing phase. Aluminum temperature uniform coefficient with air-fuel ratio rises firstly during heating and holding phase, and then drops during standing phase. Aluminum temperature uniform coefficient increases as elevating vertical burner angle or pool depth.
出处
《铸造》
CAS
CSCD
北大核心
2014年第3期225-231,共7页
Foundry
基金
国家自然科学青年基金(51206001)
校自然科学青年基金(QZ201303
QS201304)
关键词
保温炉
数值模拟
热工特性
偏最小二乘法
holding furnace
numerical simulation
thermal characteristics
partial least squares method
