脱油沥青喷雾造粒过程影响因素分析Influencing Factors Analysis of De-Oiled Asphalt Spray Granulation
范勐,孙学文,许志明,赵锁奇,翟博
摘要(Abstract):
利用重油梯级分离耦合萃余残渣喷雾造粒的方法将脱油沥青制成沥青粉,为脱油沥青提供了良好的应用前景。在连续溶剂脱沥青装置上考察了影响脱油沥青造粒的主要因素,原料为加拿大油砂沥青、委内瑞拉常压及减压渣油、中东减压渣油,溶剂为正丁烷、正戊烷、正己烷及其混合溶剂,萃取塔底温度分别为130、146、160℃,而副溶剂温度为130℃、150℃,压力为5 MPa,溶剂比为4,喷嘴内径分别选用3、4、8 mm,溶剂分散空间分别为受限空间及敞开空间,氮气气提流速分别为0.063 m·s-1、0.080 m·s-1。通过对脱油沥青颗粒进行拍照对比分析,发现影响因素主要有脱油沥青的性质、萃取塔底及副溶剂的温度、喷嘴内径、溶剂的扩散空间及氮气气提作用。要得到符合造粒要求的高硬组分含量的脱油沥青必须综合考虑原料及溶剂两种因素。适宜的萃取塔底及副溶剂温度、较小的喷嘴内径、溶剂扩散的敞开空间以及适宜的氮气流速均有利于喷雾造粒的顺利实施。
关键词(KeyWords): 溶剂脱沥青;脱油沥青;造粒;影响因素
基金项目(Foundation): 国家重点基础研究发展计划(973)资助项目(2010CB226901,2010CB226902);; 国家国际合作科技计划项目(2008DFA41160)
作者(Author): 范勐,孙学文,许志明,赵锁奇,翟博
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