基于激光感生击穿光谱的燃煤结渣特性评估  

Study on Real-time Evaluation of Slagging Propensities of Coals Based on Laser-induced Breakdown Spectroscopy

作　　者：谢承利[1] 陆继东[1] 李捷[1] 刘彦[2] 李娉[2] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,湖北省武汉市430074 [2]华南理工大学电力学院,广东省广州市510640

出　　处：《中国电机工程学报》2007年第23期24-27,共4页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50576029)~~

摘　　要：提出一种利用激光感生光谱在线测量技术来评估燃煤结渣特性的方法。根据测量机理搭建了实验台架,选取4种典型的燃煤作为分析样品,其中6种用于制定激光感生击穿光谱定量分析的标准曲线,并利用该曲线对另外两种样品进行分析测量,将测量结果进行化学换算计算出煤粉的硅铝比以评估煤粉的结渣特性。将评估结果与以实验灰分分析为基础的其他结渣特性预测指标的计算结果进行了比较,结果表明两种预测结果相符。同时,文中也对进一步提高该方法预测精度的测量系统改进方案进行了探讨。A method of real-time evaluation of slagging propensities of coals based on element quantitative technique by laser-induced breakdown spectroscopy was introduced. An experiment apparatus was set up according to the principle of analysis technique, and in which six typical coals samples were analyzed. Four ones were used to construct calibration curves of the analyzed elements as a reference diagram determining the relation between element concentration and spectral intensity, afterwards, analyzed silicon element and aluminum element in other samples were surveyed with the reference diagram. Ratios of silicon dioxide to aluminum trioxide were computed subsequently according to chemical calculation to evaluate the slagging propensities of coals. Comparing the evaluation with the computed result based on ash composition analyzed with conventional measure, the two match well. After all, some improvement programs to optimize the measurement mechanism were discussed.

关 键 词：结渣特性 激光感生击穿光谱 锅炉 煤粉 测量 

分 类 号：TK16[动力工程及工程热物理—热能工程]