煤转气型厂拌沥青混合料再生设备骨料加热系统研究
发布时间：2019-05-20 09:17
【摘要】：厂拌沥青混合料再生设备是沥青路面筑养护的主要设备之一,广泛用于公路建设与养护中。随着我国公路建设的快速发展,路面养护与旧料再生规模不断扩大,对厂拌沥青混合料再生设备性能提出了更高的要求。骨料加热系统是厂拌沥青混合料再生设备的核心部分,其性能直接影响骨料加热质量、热能利用以及废气颗粒的排放。因此研究骨料加热系统,开发出性能更优、效率更高的厂拌沥青混合料再生设备,对资源利用,节能和环保具有重要的现实意义。本文运用理论分析与试验相结合方法,对煤转气型厂拌沥青混合料再生设备骨料加热系统进行研究,主要研究工作如下。首先,分析了厂拌热再生设备及其骨料加热系统结构与工作原理,对加热系统匹配关系进行了研究探讨。通过烟气特征分析,计算了烟气中成分含量,为除尘系统的匹配研究提供了理论依据;进行了燃烧器燃烧温度计算过程;计算了加热系统煤气化过程,确定了各成分含量。对加热系统进行了热力学计算,得到干燥滚筒热能流动与热效率,给加热系统热效率分析提供了理论基础,并对骨料颗粒运动进行了分析。其次,对骨料加热系统的主要参数进行了设计与选择;改进设计了干燥滚筒主要结构与参数;通过滚筒的匹配试验研究,确定了干燥滚筒内抄板的选型与布置,通过加热系统的匹配关系,选择了燃烧器与除尘设备,完成了加热系统的设计。然后,进行了改进设计之后的煤转气型厂拌沥青混合料再生设备骨料加热系统与燃煤型、燃油型加热系统对比试验,证明了煤转气型再生设备骨料加热系统设计与选择合理,节能环保效果显著;对骨料加热系统改进设计前后煤转气型厂拌沥青混合料再生设备进行了对比试验,结果为改进之后煤转气型骨料加热系统燃料耗量明显下降,表明煤转气型厂拌沥青混合料再生设备骨料加热系统的改进设计是成功和有效的。最后,进行了加热系统再生性能试验,通过出料温度的实测数据与样品的相关试验,证明了该设备骨料加热与再生性能良好,新旧料、再生料以及热稳定性都满足各项性能指标;并对骨料加热系统进行了实际效率分析,给出了相应的措施与建议。
[Abstract]:The recycling equipment of asphalt mixture is one of the main equipment of asphalt pavement construction and maintenance, which is widely used in highway construction and maintenance. With the rapid development of highway construction in our country, the scale of pavement maintenance and old material regeneration is expanding, which puts forward higher requirements for the performance of factory mix asphalt mixture recycling equipment. Aggregate heating system is the core part of asphalt mixture recycling equipment. Its performance directly affects the heating quality of aggregate, the utilization of heat energy and the emission of waste gas particles. Therefore, it is of great practical significance for resource utilization, energy saving and environmental protection to study aggregate heating system and develop better performance and higher efficiency of factory mix asphalt mixture recycling equipment. In this paper, the aggregate heating system of coal-to-gas asphalt mixture recycling equipment is studied by means of theoretical analysis and test. The main research work is as follows. Firstly, the structure and working principle of the plant mixing heat recycling equipment and its aggregate heating system are analyzed, and the matching relationship of the heating system is studied and discussed. Through the analysis of flue gas characteristics, the content of components in flue gas is calculated, which provides a theoretical basis for the matching study of dust removal system, the combustion temperature calculation process of burners is carried out, and the coal gasification process of heating system is calculated, and the contents of each component are determined. The thermodynamic calculation of the heating system is carried out, and the thermal energy flow and thermal efficiency of the drying drum are obtained, which provides a theoretical basis for the thermal efficiency analysis of the heating system, and the movement of aggregate particles is analyzed. Secondly, the main parameters of the aggregate heating system are designed and selected, and the main structure and parameters of the drying drum are improved. Through the matching test of the drum, the selection and arrangement of the plate in the drying drum are determined. Through the matching relationship of the heating system, the burners and dust removal equipment are selected, and the design of the heating system is completed. Then, the comparative test of aggregate heating system, coal fuel type and oil type heating system of coal to gas type asphalt mixture recycling equipment after the improved design is carried out, and it is proved that the design and selection of aggregate heating system of coal to gas type recycling equipment are reasonable. The effect of energy saving and environmental protection is remarkable. A comparative test was carried out on the recycling equipment of coal-to-gas mix asphalt mixture before and after the improved design of the aggregate heating system. The results showed that the fuel consumption of the coal-to-gas aggregate heating system decreased obviously after the improvement. The results show that the improved design of aggregate heating system for coal-to-gas mixture recycling equipment is successful and effective. Finally, the regeneration performance test of the heating system is carried out. through the measured data of the discharge temperature and the related tests of the samples, it is proved that the aggregate heating and recycling performance of the equipment is good, and the new and old materials are good. The recycled material and thermal stability meet all the performance indexes. The actual efficiency of aggregate heating system is analyzed, and the corresponding measures and suggestions are given.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414
本文编号：2481537
[Abstract]:The recycling equipment of asphalt mixture is one of the main equipment of asphalt pavement construction and maintenance, which is widely used in highway construction and maintenance. With the rapid development of highway construction in our country, the scale of pavement maintenance and old material regeneration is expanding, which puts forward higher requirements for the performance of factory mix asphalt mixture recycling equipment. Aggregate heating system is the core part of asphalt mixture recycling equipment. Its performance directly affects the heating quality of aggregate, the utilization of heat energy and the emission of waste gas particles. Therefore, it is of great practical significance for resource utilization, energy saving and environmental protection to study aggregate heating system and develop better performance and higher efficiency of factory mix asphalt mixture recycling equipment. In this paper, the aggregate heating system of coal-to-gas asphalt mixture recycling equipment is studied by means of theoretical analysis and test. The main research work is as follows. Firstly, the structure and working principle of the plant mixing heat recycling equipment and its aggregate heating system are analyzed, and the matching relationship of the heating system is studied and discussed. Through the analysis of flue gas characteristics, the content of components in flue gas is calculated, which provides a theoretical basis for the matching study of dust removal system, the combustion temperature calculation process of burners is carried out, and the coal gasification process of heating system is calculated, and the contents of each component are determined. The thermodynamic calculation of the heating system is carried out, and the thermal energy flow and thermal efficiency of the drying drum are obtained, which provides a theoretical basis for the thermal efficiency analysis of the heating system, and the movement of aggregate particles is analyzed. Secondly, the main parameters of the aggregate heating system are designed and selected, and the main structure and parameters of the drying drum are improved. Through the matching test of the drum, the selection and arrangement of the plate in the drying drum are determined. Through the matching relationship of the heating system, the burners and dust removal equipment are selected, and the design of the heating system is completed. Then, the comparative test of aggregate heating system, coal fuel type and oil type heating system of coal to gas type asphalt mixture recycling equipment after the improved design is carried out, and it is proved that the design and selection of aggregate heating system of coal to gas type recycling equipment are reasonable. The effect of energy saving and environmental protection is remarkable. A comparative test was carried out on the recycling equipment of coal-to-gas mix asphalt mixture before and after the improved design of the aggregate heating system. The results showed that the fuel consumption of the coal-to-gas aggregate heating system decreased obviously after the improvement. The results show that the improved design of aggregate heating system for coal-to-gas mixture recycling equipment is successful and effective. Finally, the regeneration performance test of the heating system is carried out. through the measured data of the discharge temperature and the related tests of the samples, it is proved that the aggregate heating and recycling performance of the equipment is good, and the new and old materials are good. The recycled material and thermal stability meet all the performance indexes. The actual efficiency of aggregate heating system is analyzed, and the corresponding measures and suggestions are given.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414
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