搅拌设备沥青罐动态加热模型的研究与应用
2016-04-21刘洪海唐冬冬韩久剑��
刘洪海 唐冬冬 韩久剑��



摘要:为了研究搅拌设备沥青罐加热节能技术,通过对比2种沥青罐的结构,分析动态加热原理和加热过程,建立了沥青罐动态加热模型,确定了多个沥青罐的加热时序和节点,形成“梯形动态”加热模式;根据依托的实体工程设备和混合料参数,经计算和试验验证得出,在保证搅拌设备连续生产的条件下,相邻罐沥青加热的时间节点为,在用罐内沥青剩余20.6%。该工艺较传统工艺节能16.4%,可以有效降低加热能耗。
关键词:路面机械;搅拌设备;动态加热;加热模型
中图分类号:U415.5 文献标志码:B
Abstract: To study the energy-saving technology for asphalt tank heating of asphalt mixing plants, a dynamic heating model was established by comparing the structures of two kinds of asphalt tanks and analyzing the principle and process of dynamic heating. The heating time and node of the asphalt tanks were determined, and the trapezoid dynamic heating mode was formed. Combined with the equipment used in practical projects and the mixing parameters, a conclusion was drawn after verifying with calculation and test, stating that under the condition that the continuous production of asphalt mixture is ensured, the heating time node for adjacent asphalt tank is when 20.6% of asphalt remains in the tank that's being used. The technology can effectively reduce the heating energy consumption, with 16.4% less comparing to traditional practice.
Key words: road machinery; asphalt mixing plants; dynamic heating; heating model
0 引 言
搅拌设备通常配置多个沥青罐,若同时加热到最高使用温度并长时间储存,不仅会使沥青老化,而且会导致大量能量消耗。针对沥青罐加热节能技术,王发听等基于CFD、FLUENT提出了沥青罐最佳搅拌装置布局,将沥青加热速度提升14%,燃油消耗减少5.5%[1-2];Peerapong Jitsangiam等依据流体力学理论模型研究了搅拌装置在罐内的布置方式与搅拌功率之间的关系。张春铮等从沥青罐安装调试方面提出有利于节能的安装要点及注意事项[3];李广斗对合理配置沥青罐容积、提高加热速度进行了研究[4];美国道路沥青铺装协会(NAPA)于2011年从排放控制、自动化控制、温拌沥青、可持续发展等方面提出了沥青储存、加热的新方法。虽然以上研究从沥青罐结构形式、温度控制、节能环保等不同角度对沥青罐提高加热效率、降低能耗进行了研究,但并未涉及施工过程中多个沥青罐的动态加热模型。……
