细粒煤干法深度筛分技术进展及研究方向
|
摘要
细粒煤干法深度筛分技术在煤炭工业中具有重要作用,已成为当今国内外筛分领域研究热点与难点。目前细粒煤干法筛分粒度界限主要为6和3 mm,尤其对于3 mm动力煤不经分选可直接用于火力发电。因此,实现6或3 mm细粒煤干法深度筛分,不仅能提高粉煤的利用率,也可节约大量分选成本。笔者论述了目前国内外细粒煤干法深度筛分相关理论研究成果,着重阐述了国内外典型细粒煤干法深度筛分设备结构及性能特点,并深入探讨了今后细粒煤干法深度筛分技术的研究方向。目前国外细粒煤干法深度筛分相关理论研究成果主要为概率筛分原理、等厚筛分理论、电磁激振理论,弛张筛分理论、强化筛分理论。论述了黏附细粒物料深度筛分模型,潮湿细粒物料的黏结力计算公式及减少黏结力方法,降低潮湿细粒物料堵孔方法以及双质体共振与网振筛分技术等。国内研究主要为实用概率筛分模型,潮湿细粒物料在筛面上积聚原因和黏附机理及黏附力、黏附厚度的影响因素,克服潮湿细粒原煤深度筛分堵孔、黏孔现象的设计方案,采用筛板振动、筛箱不振动的形式实现难筛物料的筛分,弹性筛面克服堵孔的机理及与刚性筛面筛分效果对比,细粒煤粒度分布模型分布特性研究等。在筛分技术和设备开发上不断创新,目前已开发出的概率筛、等厚筛、博后筛、高幅筛、节肢筛、琴弦筛、弛张筛、抛射筛、谐振式泰勒振动筛、双质体振动筛、电磁高频细筛等细粒煤干法深度筛分设备结构与性能特点各异,且适应于不同用途。基于目前细粒煤干法深度筛分技术发展现状,建议未来应加强筛分理论、关键技术、筛机结构优化、振动参数优化配置、筛板相关技术及多样化等方面研究。
The dry deep screening technology of fine coal plays an important role in the coal industry and has become a hot and difficult study point in the field of screening.At present,the particle size limit of dry screening of fine-grained coal is mainly 6 mm and 3 mm,especially for 3 mm steam coal,which can be directly used for thermal power generation without separation.Therefore,the realization of 6 mm or3 mm fine grained dry screening method of raw coal can not only improve the utilization rate of coal,but also can save a lot of seperation cost.In this paper,the related theoretical research results of dry deep screening of fine coal were discussed,and the structure and performance characteristics of some typical dry deep screen equipments of fine grained coal were emphatically expounded.In addition,the research direction of the dry deep screening technology of fine grained coal was discussed in depth. At present,the related theoretical research achievements of the dry deep screen theory of fine grained coal abroad include probability screen principle,equal thickness screening theory,electromagnetic excitation theory,relaxation screen theory and strengthening screen theory. In this paper,the model of depth screen of adhesive fine-grained materials,the formula for calculating the adhesion force of moist fine-grained materials and the method of reducing adhesion force,the method of reducing the plugging of wet fine-grained materials and the technique of double plasmid resonance and mesh vibration screen were discussed.The domestic research mainly focuses on the practical probabilistic screening model,the reason for the accumulation of wet fine grained materials on the screen surface and the mechanism of adhesion and the influence factors of the adhesion force and adhesion thickness,and the design scheme of overcoming the phenomenon of wet fine grained raw coal deep screening blocking holes and sticky holes,the screening of difficult materials by means of vibration of sieve plate and non-vibration of sieve box,the mechanism of elastic screen surface overcoming blockage and comparison with the screening effect of rigid screen,and the distribution characteristics and distribution model of fine-grained coal,etc.The screening technology and equipment development are constantly innovated.Recently,the structures and performance characteristics of the developed screen equipments,such as probability screen,equal thickness screen,bo hou screen,high amplitude screen,arthropod screen,string screen,relaxation screen,ejection screen,resonant Taylor screen,double plasmid screen,electromagnetic high frequency fine screen and other dry deep screen equipments of fine coal,are different and suitable for different purposes.Based on the current development status of the dry deep screen technology of fine-grained coal,it is suggested that the deep research direction should be screen theory,key technology,screen structure optimization,optimization configuration of vibration parameters,related technology of screen plate and diversification research in the future.
The dry deep screening technology of fine coal plays an important role in the coal industry and has become a hot and difficult study point in the field of screening.At present,the particle size limit of dry screening of fine-grained coal is mainly 6 mm and 3 mm,especially for 3 mm steam coal,which can be directly used for thermal power generation without separation.Therefore,the realization of 6 mm or3 mm fine grained dry screening method of raw coal can not only improve the utilization rate of coal,but also can save a lot of seperation cost.In this paper,the related theoretical research results of dry deep screening of fine coal were discussed,and the structure and performance characteristics of some typical dry deep screen equipments of fine grained coal were emphatically expounded.In addition,the research direction of the dry deep screening technology of fine grained coal was discussed in depth. At present,the related theoretical research achievements of the dry deep screen theory of fine grained coal abroad include probability screen principle,equal thickness screening theory,electromagnetic excitation theory,relaxation screen theory and strengthening screen theory. In this paper,the model of depth screen of adhesive fine-grained materials,the formula for calculating the adhesion force of moist fine-grained materials and the method of reducing adhesion force,the method of reducing the plugging of wet fine-grained materials and the technique of double plasmid resonance and mesh vibration screen were discussed.The domestic research mainly focuses on the practical probabilistic screening model,the reason for the accumulation of wet fine grained materials on the screen surface and the mechanism of adhesion and the influence factors of the adhesion force and adhesion thickness,and the design scheme of overcoming the phenomenon of wet fine grained raw coal deep screening blocking holes and sticky holes,the screening of difficult materials by means of vibration of sieve plate and non-vibration of sieve box,the mechanism of elastic screen surface overcoming blockage and comparison with the screening effect of rigid screen,and the distribution characteristics and distribution model of fine-grained coal,etc.The screening technology and equipment development are constantly innovated.Recently,the structures and performance characteristics of the developed screen equipments,such as probability screen,equal thickness screen,bo hou screen,high amplitude screen,arthropod screen,string screen,relaxation screen,ejection screen,resonant Taylor screen,double plasmid screen,electromagnetic high frequency fine screen and other dry deep screen equipments of fine coal,are different and suitable for different purposes.Based on the current development status of the dry deep screen technology of fine-grained coal,it is suggested that the deep research direction should be screen theory,key technology,screen structure optimization,optimization configuration of vibration parameters,related technology of screen plate and diversification research in the future.
引文
[1]王新文,庞锟锋,于驰.改革开放以来我国振动筛分设备的发展[J].选煤技术,2019(1):37-42.WANG Xinwen,PANG Kunfeng,YU Chi. Development of the domestic vibrating screening equipment since the in caption of reform and[J].Coal Preparation Technology,2019(1):37-42.
[2]赵环帅.我国振动筛的市场现状及发展对策[J].矿山机械,2018,46(4):1-6.ZHAO Huanshuai. Status of domestic vibrating screen market as well as development countermeasures[J]. Mining&Processing Equipment,2018,46(4):1-6.
[3]闻邦椿,刘树英.现代振动筛分技术及设备技术[M].北京:冶金工业出版社,2013.
[4]刘初升,赵跃民.潮湿细粒煤干法筛分理论和设备的发展[J].矿山机械,1997,25(10):35-37.LIU Chusheng,ZHAO Yuemin.Dry screening theory and screen development moist fine coal[J]. Mining&Processing Equipment,1997,25(10):35-37.
[5]陈惜明,赵跃民,朱红,等.潮湿细粒物料的筛分粘附模型研究[J].中国矿业大学学报,2002,31(5):407-410.CHEN Ximing,ZHAO Yuemin,ZHU Hong,et al. Adhesive model of moist fine material[J].Journal of China University of Mining&Technology,2002,31(5):407-410.
[6]赵跃民,陈惜明,朱红.潮湿细粒物料的透筛粘附模型[J].中国矿业大学学报,2000,29(2):120-123.ZHAO Yuemin,CHEN Ximing,ZHU Hong. Adhesive model of screening fine moist materials[J]. Journal of China University of Mining&Technology,2000,29(2):120-123.
[7]王宏凯,郭苗,王勇,等.潮湿细粒原煤深度筛分堵孔粘孔现象的分析[J].煤矿机械,2010,31(3):225-227.WANG Hongkai,GUO Miao,WANG Yong,et al.Analyze phenomenon of hole-filling and hole-sticking to screening moist fine coal[J].Coal Mine Machinery,2010,31(3):225-227.
[8]孙刚.大型潮湿细粒物料深度筛分机的研制和应用[J].煤炭加工与综合利用,2004(1):18-20.SUN Gang.Development and application of deep screen of large wet fine grain materials[J].Coal Processing&Comprehensive Utilization,2004(1):18-20.
[9]刘初升,赵跃民.弹性筛面解决潮湿细粒物料深度筛分堵孔问题的研究[J].江苏煤炭,1997(3):10-12.
[10]孙铭阳,朱学帅,韦鲁滨.细粒煤粒度分布特性的研究[J].太原理工大学学报,2016,47(4):436-440.SUN Mingyang,ZHU Xueshuai,WEI Lubin.Studies of size distribution characteristics of fine coal[J].Journal of Taiyuan University and Technology,2016,47(4):436-440.
[11]陈惜明,朱红,赵跃民.潮湿细粒煤用筛分机械的现状及发展[J].煤炭加工与综合利用,2000(3):6-9.CHEN Ximing,ZHU Hong,ZHAO Yuemin. Present status&progress of screening. machines for wetted coal fines[J]. Coal Processing&Comprehensive Utilization,2000(3):6-9.
[12]孙刚,吴玲,孙微.细粒难筛物料筛分机械的发展现状[J].煤质技术,1999(1):33-35.
[13]彭会清,曹钊,曹永丹.筛分机械与筛分机理研究的现状及发展[J].矿山机械,2009,37(15):105-109.PENG Huiqing,CAO Zhao,CAO Yongdan. Present condition and development of screening machinery and mechanisms[J]. Mining&Processing Equipment,2009,37(15):105-109.
[14]刘春水.弛张筛在潮湿细粒煤筛分领域的应用前景[J].煤炭加工与综合利用,2017(1):56-57.LIU Chunshui.The application prospect of flip-flow screening wet fine coal screening[J]. Coal Processing&Comprehensive Utilization,2017(1):56-57.
[15]刘文统.弛张筛在动力煤深度分级中的应用[J].洁净煤技术,2015,21(3):18-20,24.LIU Wentong. The application of Flip-Flow screening in the depth classification of thermal coal[J]. Clean Coal Technology,2015,21(3):18-20,24.
[16]赵环帅.弛张筛在我国的发展现状及对策建议[J].煤炭加工与综合利用,2018(11):20-24,27.ZHAO Huanshuai.The market status of Flip-Flow screen and development proposals of future in China[J]. Coal Processing&Comprehensive Utilization,2018(11):20-24,27.
[17]徐文彬,李素妍,徐浩博,等.粘湿煤炭干法深度筛分关键技术研究及抛射筛的研制[J].煤炭加工与综合利用,2017(9):5-12.XU Wenbin,LI Suyan,XU Haobo,et al.Study on the key technology of dry deep screening of wet coal and the manufacture of projectile screen[J]. Coal Processing&Comprehensive Utilization,2017(9):5-12.
[18]赵环帅.高频振动筛的发展现状及今后重点研究方向[J].选煤技术,2019(2):1-8.ZHAO Huanshuai.State-of-art of development of high-frequency vibrating screen and the key research direction in the future[J].Coal Preparation Technology,2019(2):1-8.
[2]赵环帅.我国振动筛的市场现状及发展对策[J].矿山机械,2018,46(4):1-6.ZHAO Huanshuai. Status of domestic vibrating screen market as well as development countermeasures[J]. Mining&Processing Equipment,2018,46(4):1-6.
[3]闻邦椿,刘树英.现代振动筛分技术及设备技术[M].北京:冶金工业出版社,2013.
[4]刘初升,赵跃民.潮湿细粒煤干法筛分理论和设备的发展[J].矿山机械,1997,25(10):35-37.LIU Chusheng,ZHAO Yuemin.Dry screening theory and screen development moist fine coal[J]. Mining&Processing Equipment,1997,25(10):35-37.
[5]陈惜明,赵跃民,朱红,等.潮湿细粒物料的筛分粘附模型研究[J].中国矿业大学学报,2002,31(5):407-410.CHEN Ximing,ZHAO Yuemin,ZHU Hong,et al. Adhesive model of moist fine material[J].Journal of China University of Mining&Technology,2002,31(5):407-410.
[6]赵跃民,陈惜明,朱红.潮湿细粒物料的透筛粘附模型[J].中国矿业大学学报,2000,29(2):120-123.ZHAO Yuemin,CHEN Ximing,ZHU Hong. Adhesive model of screening fine moist materials[J]. Journal of China University of Mining&Technology,2000,29(2):120-123.
[7]王宏凯,郭苗,王勇,等.潮湿细粒原煤深度筛分堵孔粘孔现象的分析[J].煤矿机械,2010,31(3):225-227.WANG Hongkai,GUO Miao,WANG Yong,et al.Analyze phenomenon of hole-filling and hole-sticking to screening moist fine coal[J].Coal Mine Machinery,2010,31(3):225-227.
[8]孙刚.大型潮湿细粒物料深度筛分机的研制和应用[J].煤炭加工与综合利用,2004(1):18-20.SUN Gang.Development and application of deep screen of large wet fine grain materials[J].Coal Processing&Comprehensive Utilization,2004(1):18-20.
[9]刘初升,赵跃民.弹性筛面解决潮湿细粒物料深度筛分堵孔问题的研究[J].江苏煤炭,1997(3):10-12.
[10]孙铭阳,朱学帅,韦鲁滨.细粒煤粒度分布特性的研究[J].太原理工大学学报,2016,47(4):436-440.SUN Mingyang,ZHU Xueshuai,WEI Lubin.Studies of size distribution characteristics of fine coal[J].Journal of Taiyuan University and Technology,2016,47(4):436-440.
[11]陈惜明,朱红,赵跃民.潮湿细粒煤用筛分机械的现状及发展[J].煤炭加工与综合利用,2000(3):6-9.CHEN Ximing,ZHU Hong,ZHAO Yuemin. Present status&progress of screening. machines for wetted coal fines[J]. Coal Processing&Comprehensive Utilization,2000(3):6-9.
[12]孙刚,吴玲,孙微.细粒难筛物料筛分机械的发展现状[J].煤质技术,1999(1):33-35.
[13]彭会清,曹钊,曹永丹.筛分机械与筛分机理研究的现状及发展[J].矿山机械,2009,37(15):105-109.PENG Huiqing,CAO Zhao,CAO Yongdan. Present condition and development of screening machinery and mechanisms[J]. Mining&Processing Equipment,2009,37(15):105-109.
[14]刘春水.弛张筛在潮湿细粒煤筛分领域的应用前景[J].煤炭加工与综合利用,2017(1):56-57.LIU Chunshui.The application prospect of flip-flow screening wet fine coal screening[J]. Coal Processing&Comprehensive Utilization,2017(1):56-57.
[15]刘文统.弛张筛在动力煤深度分级中的应用[J].洁净煤技术,2015,21(3):18-20,24.LIU Wentong. The application of Flip-Flow screening in the depth classification of thermal coal[J]. Clean Coal Technology,2015,21(3):18-20,24.
[16]赵环帅.弛张筛在我国的发展现状及对策建议[J].煤炭加工与综合利用,2018(11):20-24,27.ZHAO Huanshuai.The market status of Flip-Flow screen and development proposals of future in China[J]. Coal Processing&Comprehensive Utilization,2018(11):20-24,27.
[17]徐文彬,李素妍,徐浩博,等.粘湿煤炭干法深度筛分关键技术研究及抛射筛的研制[J].煤炭加工与综合利用,2017(9):5-12.XU Wenbin,LI Suyan,XU Haobo,et al.Study on the key technology of dry deep screening of wet coal and the manufacture of projectile screen[J]. Coal Processing&Comprehensive Utilization,2017(9):5-12.
[18]赵环帅.高频振动筛的发展现状及今后重点研究方向[J].选煤技术,2019(2):1-8.ZHAO Huanshuai.State-of-art of development of high-frequency vibrating screen and the key research direction in the future[J].Coal Preparation Technology,2019(2):1-8.