一种新型在线近红外光谱分析仪的研制

研制了一种新型的电荷耦合器件(CCD)在线近红外光谱分析仪，它由光谱仪系统、电源电路与控制系统、光纤及其附件与流通池系统、防爆系统、样品前处理系统、模型界外样品抓样系统、实时光谱测量和化学计量学软件等部分组成。在兰州炼油厂联合重整装置上连续5个月的工业实验表明，该仪表测定汽油辛烷值的准确性为0．3个辛烷值单位，重复性为0．2个辛烷值单位，具有准确性高、稳定性好、测量速度快、安全性强、自动化程度高和分析测试项目扩展性宽等特点。该仪表可与APC技术或其它自动化系统联用，对石化等大型生产装置的技术进步将产生积极的推动作用。

Development of A Novel On-line Near Infrared Spectroscopy Analyzer with Charge Coupled Device Detector

A novel on-line near infrared spectroscopy (NIR) analyzer with charge coupled device (CCD) detector was designed and manufactured. The optical theory,hardware configuration,and its technical features are introduced in detail. It consists of spectrometer system,explosion protection system,optical fiber and flow cell system,sample preconditioning system,outlier sample auto-grabbing system,and control and measurement software. A self-contained chemometrics software was also developed for calibration and prediction. It can monitor up to six channels,and measure fifteen chemical and physical properties simultaneously. The analytical time per channel is less than 40 seconds. The analyzer has advantages of no moving optical parts,super long-term stability,high analytical speed,low maintenance costs. It has been successfully applied to reforming unit in Lanzhou Refinery to determine Research Octane Number (RON) and aromatics contents for five months,the accuracy for RON is 0.3 and the repeatability is 0.2. The analytical results obtained by the analyzer can be easily communicated with existing process control system to realize optimization control.