| 背压和热压缩空气对流化床气流粉碎的影响 |
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| 引用本文： | 张明星,陈海焱,颜翠平.背压和热压缩空气对流化床气流粉碎的影响[J].非金属矿,2009,32(1). |
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| 作者姓名： | 张明星 陈海焱 颜翠平 |
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| 作者单位： | 西南科技大学,固体废物处理与资源化教育部重点实验室,四川,绵阳,621010 |
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| 基金项目： | 国家支撑计划重大项目 |
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| 摘 要： | 为了提高气流粉碎机的粉碎效率并降低能耗,本实验通过粉碎区背压对粉碎的影响和热压缩空气对喷嘴气流速度的影响进行了研究.结果表明:对超音速喷嘴,与喷嘴背压相匹配的值才能产生最好的粉碎效率;通过相同马赫数的喷嘴,在入口温度为80℃、150℃、300℃时,出口气流速度分别比30℃时的喷嘴出口速度高8%、18%、38%;将压缩空气加热到150℃用于粉碎气源,比常温压缩空气要节约26%～31%的粉碎能耗.同时热空气粉碎具有较好的剥片性,能有效保护云母等矿物的片状结构特性.
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| 关 键 词： | 流化床气流粉碎 背压 热压缩空气 粉碎效率 |
Effect of Back Pressure and Hot Compressed Air on Jet Grinding of Fluidized-bed |
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| Zhang Mingxing,Chen Haiyan,Yan Cuiping.Effect of Back Pressure and Hot Compressed Air on Jet Grinding of Fluidized-bed[J].Non-metallic Mines,2009,32(1). |
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| Authors: | Zhang Mingxing Chen Haiyan Yan Cuiping |
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| Affiliation: | The Key Laboratory of Solid WasteTreatment and Reclamation;Ministry Education;Southwest University of Science and Technology;Mianyang Sichuan 621010 |
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| Abstract: | Nowadays the higher Mach number is adopted to deign nozzle,however,the fluidity parameters of nozzle and systematic airflow status are not considered in jet grinding.So it is difficult to ensure the efficiency of jet grinding and lower the systematic energy.To improve the efficiency of jet grinding and lower the systematic energy,the study was focused on the effect of back pressure on efficiency in jet grinding and the impact of hot compressed air on airflow velocity.The results show:the values matching wit... |
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| Keywords: | fluidized bed back pressure hot compressed air grinding efficiency |
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