基于近红外透光度扫描的重油稳定性检测技术研究
发布时间：2018-07-16 11:56
【摘要】：本论文设计了一种仪器用于实现基于近红外透光度扫描的重油稳定性检测,并借助仪器深入研究了检测过程,构建了检测过程透光度变化的数学模型。首先对重油稳定性问题产生的原因、沥青质分离的过程进行了深入研究,在此基础上分析了检测方法的理论基础,论证了检测方法的可行性。之后根据检测方法要求进行了重油稳定性检测仪的研发,包括单片机控制系统设计、近红外透光度检测系统设计、检测平台平稳运行和精确定位解决方案、步进电机运动控制算法等。并拓展了仪器的人机交互、数据读写、通信等功能。完成检测设备的研制后,本文根据检测原理,对检测设备进行了误差分析和功能验证,验证了仪器功能的实现,并为设备检测精度的提高提供了改进方案。最后使用该仪器对检测过程的透光度变化情况和粒子沉降情况进行了详细研究。根据透光度数据估算出检测过程的粒子沉降速度和粒子直径分布,并将检测过程划分为沥青质分离、颗粒快速沉降、颗粒干扰沉降、基本沉降完成四个阶段,针对四个阶段分别提出了透光度均值变化的数学模型。最后根据四个阶段的数学模型,对透光度均值变化数据进行了曲线拟合,根据拟合效果验证模型可用。并为沉降过程中沥青质分离过程、粒子浓度、粒子直径的进一步研究提供了方法。
[Abstract]:In this paper, an instrument is designed to detect the stability of heavy oil based on near infrared transmittance scanning. Firstly, the cause of the problem of heavy oil stability and the process of asphaltene separation are studied in depth. On this basis, the theoretical basis of the detection method is analyzed, and the feasibility of the detection method is demonstrated. Then according to the requirements of the detection method, the research and development of the heavy oil stability detector is carried out, including the design of the single-chip microcomputer control system, the design of the near-infrared transmittance detection system, the smooth operation of the detection platform and the solution of accurate positioning. Step motor motion control algorithm and so on. And expand the instrument's man-machine interaction, data reading and writing, communication and other functions. After the development of the testing equipment, the error analysis and function verification of the testing equipment are carried out according to the detection principle, the realization of the instrument function is verified, and an improved scheme is provided for the improvement of the detection precision of the equipment. At last, the change of transmittance and particle sedimentation are studied in detail by using this instrument. According to the transmittance data, the particle settling velocity and particle diameter distribution are estimated, and the detection process is divided into four stages: asphaltene separation, particle rapid settlement, particle interference settlement, and basic settlement completion. According to the four stages, the mathematical model of the change of the mean value of transmittance is put forward. Finally, according to the mathematical model of four stages, the curve fitting of the data of the change of the mean value of transmittance is carried out, and the model is proved to be available according to the fitting effect. It also provides a method for the further study of asphaltene separation process, particle concentration and particle diameter.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE622
本文编号：2126313
[Abstract]:In this paper, an instrument is designed to detect the stability of heavy oil based on near infrared transmittance scanning. Firstly, the cause of the problem of heavy oil stability and the process of asphaltene separation are studied in depth. On this basis, the theoretical basis of the detection method is analyzed, and the feasibility of the detection method is demonstrated. Then according to the requirements of the detection method, the research and development of the heavy oil stability detector is carried out, including the design of the single-chip microcomputer control system, the design of the near-infrared transmittance detection system, the smooth operation of the detection platform and the solution of accurate positioning. Step motor motion control algorithm and so on. And expand the instrument's man-machine interaction, data reading and writing, communication and other functions. After the development of the testing equipment, the error analysis and function verification of the testing equipment are carried out according to the detection principle, the realization of the instrument function is verified, and an improved scheme is provided for the improvement of the detection precision of the equipment. At last, the change of transmittance and particle sedimentation are studied in detail by using this instrument. According to the transmittance data, the particle settling velocity and particle diameter distribution are estimated, and the detection process is divided into four stages: asphaltene separation, particle rapid settlement, particle interference settlement, and basic settlement completion. According to the four stages, the mathematical model of the change of the mean value of transmittance is put forward. Finally, according to the mathematical model of four stages, the curve fitting of the data of the change of the mean value of transmittance is carried out, and the model is proved to be available according to the fitting effect. It also provides a method for the further study of asphaltene separation process, particle concentration and particle diameter.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE622
【参考文献】
相关期刊论文 前10条
1 王耀宁;;浅析燃料油市场发展现状[J];化工管理;2016年30期
2 高建宇;程锐涵;晁晖;王莎莎;;基于Cortex-M3的液温检测系统设计[J];数字技术与应用;2015年08期
3 刘永梅;刘志刚;;光纤定位单元的微型步进电机速度控制优化[J];机械与电子;2015年06期
4 王海波;;国内燃料油供需现状分析与思考[J];当代石油石化;2015年05期
5 刘新亮;张菅;尹海亮;;沥青质分散剂对重质燃料油沥青质分散稳定作用研究[J];当代化工;2014年03期
6 张志华;;均质机在船用重质燃油系统中的应用[J];中国高新技术企业;2013年34期
7 黄金珠;;中国燃料油市场现状与展望[J];中外能源;2013年09期
8 吴运吾;;我国船用燃料油市场分析[J];当代石油石化;2011年10期
9 张龙力;杨国华;阙国和;杨朝合;山红红;;大港常压渣油临氮与临氢热反应过程中胶体稳定性变化研究[J];燃料化学学报;2011年09期
10 杨超;张冬泉;;基于S曲线的步进电机加减速的控制[J];机电工程;2011年07期
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