摘要
进行掺炼热转化过程的基础研究可以为炼厂优化掺炼过程以及节能减排增效提供理论指导。文章利用热重分析(TG)和差示扫描量热分析(DSC)模拟热反应过程研究了大庆减渣(DQVR)掺混不同比例辽河减渣(LHVR)和委内瑞拉减渣(VNVR)体系的热反应特性。同时采用偏光显微观察技术对其成焦特性进行了考察。结果表明:随着劣质渣油所占质量分数的增加,热流强度和总反应热逐渐降低。相对LHVR而言,VNVR使得掺混体系热过程中热流强度变化更为剧烈。劣质渣油掺混比例为质量分数10%时,体系基本没有出现分相。VNVR由于和DQVR在平均分子结构特性上存在的较大差异,使得DQVR和VNVR掺混体系的整体稳定性较差。受热反应过程中,较易出现分相现象,导致2种渣油分相成焦。
The thermal process with blending inferior residues are able to provide theoretical guide for the optimizing of process with blending feeds, reducing emission and improving energy efficiency plus profit. Thermogravimetry and differential scanning calorimetry （TG/DSC） were used to research the thermal properties of Daqing vacuum residue （DQVR） blending with Liaohe vacuum residue （LHVR） and Venezuela vacuum residue （VNVR） under different ratios. Polarized light microscope was implemented for the morphology of coke produced. The results indicate that the intensity of heat flow and the enthalpy gradually decreases with the blending mass fraction increasing. By comparison with blending LHVR, the blending of VNVR can make the variation of intensity severer. When the blending mass fraction is 10%, the blending systems show no obvious change in the phase distribution. There is remarkable difference in the structural properties between VNVR and DQVR, which makes the blending system of DQVR and VNVR more unstable. The phase separation is likely to occur under thermal process, which results in different coking patterns in the same system.
出处
《化学工程》
CAS
CSCD
北大核心
2012年第10期70-74,共5页
Chemical Engineering(China)
基金
中国石油天然气集团公司"劣质重油轻质化关键技术研究"重大专项项目(W2008E-1503/01)
关键词
劣质渣油
差示扫描量热
成焦特性
掺炼
反应热
inferior residues
differential scanning calorimetry
morphology of coke
blending
enthalpy
