蓄热式多孔型烧嘴结构对火焰燃烧特性的影响

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• 英文论文题名：Effects of regenerative preheating nozzles' structure with multiple gas holes on Performance of Combustion
• 论文作者：袁飞 ; 龚华超 ; 汪红兵 ; 徐安军 ; 贺东风 ; 周佩玲
• 英文论文作者：Yuan Fei ; Gong Huachao ; Wang Hongbing ; Xu Anjun ; He Dongfeng ; Zhou Peiling ; School of Metallurgical and Ecological Engineering ; University of Science and Technology Beijing ; State Key Laboratory of Advanced Metallurgy ; University of Science and Technology Beijing ; School of Computer and Communication Engineering ; University of Science and Technology Beijing ; State Key Laboratory of High-Efficient Mining and Safety of Metal Mines(University of Science and Technology Beijing) ; Ministry of Education
• 年：2016
• 作者机构：北京科技大学冶金与生态工程学院;北京科技大学钢铁冶金新技术国家重点实验室;北京科技大学计算机与通信工程学院;北京科技大学金属矿山高效开采与安全教育部重点实验室;
• 论文关键词：钢包 ; 烧嘴 ; 蓄热式燃烧 ; 火焰
• 英文论文关键词：ladle ; nozzle ; regenerative combustion ; flame
• 会议召开时间：2016-05-19
• 会议录名称：第十九届（2016年）全国炼钢学术会议大会报告及论文摘要集
• 语种：中文
• 分类号：TF341
• 学会代码：ZGJS
• 会议名称：第十九届（2016年）全国炼钢学术会议
• 会议地点：中国湖南长沙
• 主办单位：中国金属学会炼钢分会
• 学会名称：中国金属学会
• 页数：2
• 文件大小：149k
• 原文格式：O
• 会议级别：全国

摘要

为了改善钢铁厂钢包蓄热式烧嘴的结构,对蓄热式多孔型烧嘴的火焰燃烧特性进行模拟分析。使用有限体积法商业软件Fluent,对多煤气孔内预混式烧嘴进行了内外流场及反应的数值模拟,分析不同煤气喷入角度及煤气孔数量对火焰温度场、速度场和压力场的影响。结果表明,由于烧嘴内部的预混燃烧得到了控制,使煤气喷入角度20°、4煤气孔烧嘴有最大的火焰温度场长度和火焰后段温度场宽度,是适合大型钢包蓄热式烘烤的最优选择,其以1273K等温线为边界的火焰长度为4.89m,距烧嘴喷口4m处火焰横截面积为0.13m2煤气喷入角度70°、8煤气孔和45°、12煤气孔烧嘴的火焰长度分别为4.08m和4.23m,距喷口4m处横截面积分别为0.021m2和0.045m2。各类型烧嘴距烧嘴喷口4m处的火焰平均流速为10.7m·s-1~13.8m·s-1,都有足够的流场搅拌效果。不同类型烧嘴内部的压损为1 12.2Pa~169.4Pa,都满足烘烤器鼓风机的功率要求。
In order to improve the structural design of the nozzle for ladle regenerative preheating in steel plant and providing references of choosing nozzles,an analysis of the flame combustion characteristics of regenerative preheating nozzles was taken.Flow fluid and reactions inside/outside the nozzles with multiple gas holes and fuels premixed inside were simulated.The influence of different gas injecting angles and amounts of gas holes on temperature,velocity and pressure field was analyzed.The results showed that the best choice for large ladles' regenerative preheating was the nozzle with a 20° gas injecting angle and 4 gas holes since it had the largest flame length and width at the rear of flame temperature field because of the control of premixed combustion inside the nozzle.The length of flame bounded by 1273 K isotherm was 4.89 m and the cross section area 4m away from the outlet of the nozzle was 0.13m2.The flame length of nozzles with a 70° gas injecting angle and 8 gas holes or a 45° gas injecting angle and 12 gas holes were 4.08 m and 4.23 m.Their cross section areas of flame 4m away from the outlet of the nozzle were 0.021m2 and0.045m2.The mean flame velocities of cross sections 4m away from the outlet of different types of nozzles were10.7m·s-1~13.8m·s-1 and there were enough agitation effects for flow field.Different types of nozzles with pressure losses between112.2Pa and 169.4Pa inside could all meet the requirement of blowers of baking facilities.

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